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WO2020119943A1 - Système de mise à l'air libre de réservoir de carburant à actionnement de limitation de pression et de solénoïde - Google Patents

Système de mise à l'air libre de réservoir de carburant à actionnement de limitation de pression et de solénoïde Download PDF

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Publication number
WO2020119943A1
WO2020119943A1 PCT/EP2019/025449 EP2019025449W WO2020119943A1 WO 2020119943 A1 WO2020119943 A1 WO 2020119943A1 EP 2019025449 W EP2019025449 W EP 2019025449W WO 2020119943 A1 WO2020119943 A1 WO 2020119943A1
Authority
WO
WIPO (PCT)
Prior art keywords
assembly
vent shut
fuel tank
main housing
poppet valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2019/025449
Other languages
English (en)
Inventor
Robert Dayton
Mayur Sudhir Pote
Sagar PINGALE
Sanjay MOHITE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Intelligent Power Ltd
Original Assignee
Eaton Intelligent Power Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eaton Intelligent Power Ltd filed Critical Eaton Intelligent Power Ltd
Publication of WO2020119943A1 publication Critical patent/WO2020119943A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/035—Fuel tanks characterised by venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03243—Fuel tanks characterised by special pumps, the mounting thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03256—Fuel tanks characterised by special valves, the mounting thereof
    • B60K2015/03302—Electromagnetic valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/035—Fuel tanks characterised by venting means
    • B60K2015/03542—Mounting of the venting means
    • B60K2015/03557—Mounting of the venting means comprising elements of the venting device integrated in the fuel tank, e.g. vapor recovery means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/035—Fuel tanks characterised by venting means
    • B60K2015/03561—Venting means working at specific times
    • B60K2015/03566—Venting means working at specific times comprising means for stopping the venting of fuel vapor, e.g. during refuelling or engine stop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2410/00—Constructional features of vehicle sub-units
    • B60Y2410/10—Housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2410/00—Constructional features of vehicle sub-units
    • B60Y2410/113—Mount clips, snap-fit, e.g. quick fit with elastic members

Definitions

  • the present disclosure relates generally to fuel tanks on passenger vehicles and more particularly to a fuel tank having an electronically controlled module that manages the complete evaporative system for the vehicle, the fuel tank venting system having a cam operated venting system and over pressure relief.
  • Fuel vapor emission control systems are becoming increasingly more complex, in large part in order to comply with environmental and safety regulations imposed on manufacturers of gasoline powered vehicles. Along with the ensuing overall system complexity, complexity of individual components within the system has also increased. Certain regulations affecting the gasoline-powered vehicle industry require that fuel vapor emission from a fuel tank’s ventilation system be stored during periods of an engine’s operation. In order for the overall vapor emission control system to continue to function for its intended purpose, periodic purging of stored hydrocarbon vapors is necessary during operation of the vehicle. In fuel tanks configured for use with a hybrid powertrain it is also necessary to properly vent the fuel tank. Such fuel tanks need to account for high pressures and can incorporate an over pressure relief (OPR) and over vacuum relief (OVR). Moreover, it may also be necessary to provide a means for OVR in a conventional gasoline fuel tank system.
  • OPR over pressure relief
  • OVR over vacuum relief
  • a vent shut-off assembly configured to manage venting to a fuel tank configured to deliver fuel to an internal combustion engine includes a first liquid vapor discriminator (LVD), a main housing, a poppet valve assembly and an actuator having a first solenoid.
  • the LVD is disposed in the fuel tank.
  • the main housing selectively vents to a carbon canister.
  • the poppet valve assembly has a poppet valve arranged in the main housing.
  • the actuator assembly is at least partially housed in the main housing.
  • the first solenoid one of opens and closes a poppet valve fluidly coupled to the first LVD. When the poppet valve is in a closed position, vapor is precluded from passing from the fuel tank to the carbon canister. When the poppet valve is in an open position, vapor is permitted from passing from the fuel tank to the carbon canister.
  • a second LVD is disposed in the fuel tank.
  • a first vapor tube can be fluidly connected between the first LVD and the main housing.
  • a second vapor tube can be fluidly connected between the second LVD and the main housing.
  • the main housing can include a vent line port.
  • the first and second vapor tubes can be fluidly coupled to the vent line port.
  • First and second vapor tubes can merge at a union.
  • the main housing can include a canister line port that is fluidly connected to the carbon canister.
  • a liquid pump can be configured to selectively pump liquid out of the main housing.
  • the first solenoid can be configured to selectively actuate the liquid pump.
  • a second solenoid can selectively engage a pump causing the pump to pump liquid fuel out of the main housing.
  • the first and second solenoids can be mounted in the main housing.
  • a top housing can mate with the main housing.
  • the top housing can include boss features configured to accept fasteners that couple at least one of the first and second solenoids to the top housing.
  • the top housing can further comprise a u-channel receiving structure arranged to receive one of the first and second solenoids.
  • the poppet valve assembly can include a poppet, a carrier that supports the poppet, a disk that supports a seal member and a pin that selectively engages the first cam.
  • the poppet valve assembly can further comprise a first biasing member biased between the poppet and the carrier.
  • a second biasing member can be biased between the disk and the retainer.
  • a third biasing member can be biased between the retainer and the collar fixed to the pin.
  • the vent shut-off assembly operates during normal operation between a fully open position and a fully closed position.
  • the solenoid moves to a position where the solenoid urges the pin to be depressed causing the poppet to be lifted off of sealing engagement with an inner lip seal of the seal member.
  • the solenoid moves to a position where the third biasing member urges the pin to retract away from the poppet to attain a sealing engagement with the inner lip seal of the seal member.
  • the vent shut-off assembly operates during an over pressure relief (OPR) event wherein pressure within the fuel tank is great enough to cause the seal member to be lifted off of a sealed position with the carrier allowing vapor to pass from the fuel tank to the carbon canister.
  • OPR over pressure relief
  • the vent shut-off assembly operates during an over vacuum relief (OVR) event wherein pressure within the fuel tank has dropped low enough to cause a vacuum wherein the poppet is lifted off of a sealing engagement with the inner lip seal of the seal member allowing vapor to pass into the fuel tank.
  • the top housing can further comprise an integrally formed retaining box that includes a series of fingers configured to slidably flex outward while receiving one of the first and second solenoids.
  • a vent shut-off assembly is configured to manage venting to a fuel tank configured to deliver fuel to an internal combustion engine.
  • the vent shut-off assembly includes a first liquid vapor discriminator (LVD), a main housing, a poppet valve assembly, a pump and an actuator having a first solenoid.
  • the LVD is disposed in the fuel tank.
  • the main housing selectively vents to a carbon canister.
  • the poppet valve assembly has a poppet valve arranged in the main housing.
  • the actuator assembly is at least partially housed in the main housing.
  • the first solenoid selectively (i) actuates a poppet valve fluidly coupled to the first LVD and (ii) actuates the pump to drain liquid from the main housing.
  • the first solenoid comprises a first plunger that acts on the poppet valve and a second plunger that acts on the pump.
  • a second LVD can be disposed in the fuel tank.
  • a first vapor tube can be fluidly connected between the first LVD and the main housing.
  • a second vapor tube can be fluidly connected between the second LVD and the main housing.
  • FIG. 1 is a schematic illustration of a fuel tank system having an evaporative emissions control system including a vent shut-off assembly, a controller, an electrical connector and associated wiring in accordance to one example of the present disclosure;
  • FIG. 2 is a front perspective view of an evaporative emissions control system including a vent shut-off assembly configured with solenoids according to one example of the present disclosure
  • FIG. 3 is an exploded view of the evaporative emissions control system of FIG.
  • FIG. 4A is a table illustrating operating conditions for the poppet valve assembly shown in FIG. 4B;
  • FIG. 4B is a cross-sectional view of the poppet assembly during the conditions shown in FIG. 4A;
  • FIG. 5A is a table illustrating operating conditions for the poppet valve assembly shown in FIG. 5B;
  • FIG. 5B is a cross-sectional view of the poppet assembly during the conditions shown in FIG. 5A;
  • FIG. 6A is a table illustrating operating conditions for the poppet valve assembly shown in FIG. 6B;
  • FIG. 6B is a cross-sectional view of the poppet assembly during the conditions shown in FIG. 6A;
  • FIG. 7A is a table illustrating operating conditions for the poppet valve assembly shown in FIG. 7B;
  • FIG. 7B is a cross-sectional view of the poppet assembly during the conditions shown in FIG. 7A;
  • FIG. 8A is a first cross-sectional view of the poppet assembly during the conditions shown in FIGS 4A and 4B;
  • FIG. 8B is a second cross-sectional view of the poppet assembly during the conditions shown in FIGS 4A and 4B;
  • FIG. 9A is a first cross-sectional view of the poppet assembly during the conditions shown in FIGS 5A and 5B;
  • FIG. 9B is a second cross-sectional view of the poppet assembly during the conditions shown in FIGS 5A and 5B;
  • FIG. 10A is a first cross-sectional view of the poppet assembly during the conditions shown in FIGS 6A and 6B;
  • FIG. 10B is a second cross-sectional view of the poppet assembly during the conditions shown in FIGS 6A and 6B;
  • FIG. 1 1A is a first cross-sectional view of the poppet assembly during the conditions shown in FIGS 7A and 7B;
  • FIG. 1 1 B is a second cross-sectional view of the poppet assembly during the conditions shown in FIGS 7A and 7B;
  • FIG. 12A is a cross-sectional view of the vent shut-off assembly taken through a pump and shown with a pump shaft in an extended position;
  • FIG. 12B is a cross-sectional view of the vent shut-off assembly taken through the pump and shown with the pump shaft in a depressed position;
  • FIG. 13 is a cross-sectional view of a vent shut-off assembly having two solenoids according to another example of the present disclosure;
  • FIG. 14 is another cross-sectional view of a vent shut-off assembly having a single solenoid according to the present disclosure
  • FIG. 15 is a top perspective view of a vent shut-off assembly constructed in accordance to another example of the present disclosure.
  • FIG. 16 is a bottom perspective view of the vent shut-off assembly of FIG. 15;
  • FIG. 17 is an exploded bottom perspective view of the vent shut-off assembly of FIG. 15;
  • FIG. 18 is a top perspective view of a vent shut-off assembly constructed in accordance to another example of the present disclosure.
  • FIG. 19 is a bottom perspective view of the vent shut-off assembly of FIG. 18;
  • FIG. 20 is an exploded bottom perspective view of the vent shut-off assembly of FIG. 18;
  • FIG. 21 is a top perspective view of a vent shut-off assembly constructed in accordance to another example of the present disclosure.
  • FIG. 22 is a bottom perspective view of the vent shut-off assembly of FIG. 21 ;
  • FIG. 23 is an exploded bottom perspective view of the vent shut-off assembly of FIG. 21 ;
  • FIG. 24 is a top perspective view of a vent shut-off assembly constructed in accordance to another example of the present disclosure.
  • FIG. 25 is a bottom perspective view of the vent shut-off assembly of FIG. 24;
  • FIG. 26 is an exploded bottom perspective view of the vent shut-off assembly of FIG. 24;
  • FIG. 27 is a top perspective view of a vent shut-off assembly constructed in accordance to another example of the present disclosure.
  • FIG. 28 is a bottom perspective view of the vent shut-off assembly of FIG. 27;
  • FIG. 29 is an exploded bottom perspective view of the vent shut-off assembly of FIG. 27;
  • FIG. 30 is a top perspective view of a vent shut-off assembly constructed in accordance to another example of the present disclosure.
  • FIG. 31 is a bottom perspective view of the vent shut-off assembly of FIG. 30;
  • FIG. 32 is an exploded bottom perspective view of the vent shut-off assembly of FIG. 30;
  • FIG. 33 is a top perspective view of a vent shut-off assembly constructed in accordance to another example of the present disclosure.
  • FIG. 34 is a bottom perspective view of the vent shut-off assembly of FIG. 33;
  • FIG. 35 is an exploded bottom perspective view of the vent shut-off assembly of FIG. 33;
  • FIG. 36 is a top perspective view of a vent shut-off assembly constructed in accordance to another example of the present disclosure.
  • FIG. 37 is a bottom perspective view of the vent shut-off assembly of FIG. 36;
  • FIG. 38 is an exploded bottom perspective view of the vent shut-off assembly of FIG. 36.
  • FIG. 39 is a sectional view taken along lines 39-39 of FIG. 37.
  • the fuel tank system 10 can generally include a fuel tank 12 configured as a reservoir for holding fuel to be supplied to an internal combustion engine via a fuel delivery system, which includes a fuel pump 14.
  • the fuel pump 14 can be configured to deliver fuel through a fuel supply line 16 to a vehicle engine.
  • the fuel tank 12 can define a vapor dome 18 generally at an upper portion of the fuel tank 12.
  • An evaporative emissions control system 20 can be configured to recapture and recycle the emitted fuel vapor.
  • the evaporative emissions control system 20 provides an electronically controlled module that manages the complete evaporative system for a vehicle.
  • the evaporative control system 20 provides a universal design for all regions and all fuels. In this regard, the requirement of unique components needed to satisfy regional regulations may be avoided. Instead, software may be adjusted to satisfy wide ranging applications. In this regard, no unique components need to be revalidated saving time and cost. A common architecture may be used across vehicle lines. Conventional mechanical in-tank valves may be replaced. As discussed herein, the evaporative control system 20 may also be compatible with pressurized systems including those associated with hybrid powertrain vehicles.
  • the evaporative emissions control system 20 includes a vent shut-off assembly 22, a manifold assembly 24, a liquid trap 26, a control module 30, a purge canister 32, a first vapor tube or vent line 40, a second vapor tube or vent line 42, a third vapor tube or vent line 43, an electrical connector 44, a fuel delivery module (FDM) flange 46 and a fuel fill level sensor assembly such as a float level sensor assembly 48.
  • the first vapor tube 40 can terminate at a vent opening or liquid vapor discriminating (LVD) valve 41A arranged at a top corner of the fuel tank 12.
  • the second vapor tube 42 can terminate at a vent opening or LVD valve 41 B arranged at a top corner of the fuel tank 12.
  • the third vapor tube 43 can terminate at a vent opening or LVD valve 41 C arranged at a top of the fuel tank 12. All of the vent openings 41A-41 C can terminate at a vapor dome 18.
  • Each of the LVD valves 41 A, 41 B and 41 C are configured to permit vapor to pass from the vapor space 18 to the vent shut-off assembly 22 while inhibiting liquid fuel from entering and passing into the vent shut-off assembly.
  • the first, second and third vapor tubes 41 , 42 and 43 can merge at a union 47. From the union 47, a vent line connection 49 connects with vent line port 50 defined on the vent shut-off assembly 22. In other examples, some or all of the vapor tubes 41 , 42 and 43 can have a dedicated input port into the vent shut-off assembly 22. In one example, the manifold assembly 24 can be defined within the vent shut-off assembly 22 downstream of the vent line port 50 (or equivalent porting that accepts the respective vapor tubes 41 , 42 and 43).
  • vent shut-off assembly 22 can take many forms.
  • the vent shut-off assembly 22 has an actuator assembly that is configured as a cam actuated system.
  • other configurations suitable to selectively open and close vent line port 50 are contemplated including, but not limited to, other mechanical systems, solenoid systems, hydraulic systems, magnetic systems and combinations thereof.
  • the control module 30 can further include or receive inputs from system sensors, collectively referred to at reference 60.
  • the system sensors 60 can include a tank pressure sensor 60A that senses a pressure of the fuel tank 12, a canister pressure sensor 60B that senses a pressure of the canister 32, a temperature sensor 60C that senses a temperature within the fuel tank 12, a tank pressure sensor 60D that senses a pressure in the fuel tank 12 and a vehicle grade sensor and or vehicle accelerometer 60E that measures a grade and/or acceleration of the vehicle. It will be appreciated that while the system sensors 60 are shown as a group, that they may be located all around the fuel tank system 10.
  • the control module 30 can additionally include fill level signal reading processing, fuel pressure driver module functionality and be compatible for two-way communications with a vehicle electronic control module (not specifically shown).
  • the vent shut-off assembly 22 can be configured to control a flow of fuel vapor between the fuel tank 12 and the purge canister 32.
  • the purge canister 32 is adapted to collect fuel vapor emitted by the fuel tank 12 and to subsequently release the fuel vapor to the engine.
  • the control module 30 can also be configured to regulate the operation of evaporative emissions control system 20 in order to recapture and recycle the emitted fuel vapor.
  • the float level sensor assembly 48 can provide fill level indications to the control module 30.
  • the control module 30 can send signals to the vent shut-off assembly 22 based on operating conditions such as provided by the sensors 60 to open and close venting from the fuel tank 12 to the purge canister 32.
  • the vent shut-off assembly 22 generally comprises a main housing 70, a top housing 72 having a canister line port 73, a poppet valve assembly 74, a cam assembly 76, a motor 78 and a pump 80.
  • the motor 78 and the cam assembly 76 can collectively define an actuator assembly 81.
  • the main housing 70 and the top housing 72 can collectively define a chamber that includes the manifold assembly 24.
  • the main housing 70 can define a poppet assembly receiving bore 84 and a pump outlet opening 88.
  • the poppet assembly receiving bore 84 leads to the vent line port 50 and receives the poppet valve assembly 74.
  • the pump outlet opening 88 generally mounts the pump 80 and provides an outlet for pumping liquid out of the main housing 70 as will be described in detail herein.
  • a vent line 89 can be fluidly connected between the canister line port 73 of the vent shut-off assembly 22 and the canister 32.
  • the cam assembly 76 generally includes a first or poppet cam 90 and a second or pump cam 92.
  • the first and second cams 90, 92 are mounted for rotation with a cam shaft 94.
  • a gear 96 is meshingly engaged with a complementary gear (not shown) extending from the motor 78. In other examples the gear 96 can be directly coupled for rotation with a motor drive shaft.
  • the first cam 90 (see FIG. 8A) generally includes a cam surface 100 having a generally high lift surface 102 and a low lift surface 104.
  • the second cam 92 (FIG. 12A) generally includes lift lobes 1 12, 1 14 separated by a valley 1 16.
  • movement of the cam 92 causes a pump shaft 1 18 extending from the pump 80 to translate along its axis as it slidably negotiates along the cam 92 between the lift lobes 1 12, 1 14 and the valley 1 16 causing the pump 80 to pump liquid fuel out of the main housing 70.
  • the pump shaft 1 18 is urged into engagement with the cam 92 by a pin biasing member 1 19.
  • the poppet valve assembly 74 includes a poppet 120, a disk 122 that supports a seal member 124, a pin 130, a retainer 132 and a poppet carrier 136.
  • a first biasing member 140 is biased between the poppet 120 and the carrier 136.
  • a second biasing member 144 is biased between the disk 122 and the retainer 132.
  • a third biasing member 146 is biased between the retainer 132 and a collar 150 on the pin 130.
  • the seal member 124 includes an inner lip seal 154 and an outer lip seal 156.
  • the poppet valve assembly 74 will be described as moving between fully open and closed positions for achieving various operating functions. However, the poppet valve assembly 74 and other components (such as the disk 122) can move to attain positons intermediate“fully open” and“fully closed”. In this regard, it may be desirable, based on operating conditions, to vent the fuel tank 12 to the carbon canister 30 a predetermined amount between fully open and fully closed.
  • the poppet valve 74 allows the vent shut-off assembly 22 to operate in various states, depending on operating conditions, to allow vapor to flow along a first path A (from the fuel tank 12 to the carbon canister 32) or a second path B (from the carbon canister 32 to the fuel tank 12).
  • vapor that enters at least one of the LVD valves 41 A, 41 B, 41 C passes along at least one of the vapor lines 40, 42, 43 and enters the vent shut-off assembly 22.
  • the operating state of the poppet valve 74 allows the vapor to pass therethrough and out of the canister line port 73 to the carbon canister 32 (see flow path A, FIG. 2).
  • Flow path A is desirable alleviate high pressure within the vapor space 18 of the fuel tank.
  • Flow path A can also be desirable during a refueling event or other operating conditions that may cause pressure to rise above a threshold.
  • the poppet valve 74 can be commanded to move (by the controller 30, FIGS. 4A, 4B) to achieve flow path A or, can automatically move to achieve flow path A (over pressure relief condition, FIGS. 6A, 6B).
  • fresh air is permitted to pass from the carbon canister 32, into the vent shut-off assembly 22.
  • the operating state of the poppet valve 74 allows that fresh air to exit the vent shut-off assembly 22 through the vent line port 50 and backflow into the vapor space 18 through at least one of the LVD valves 41 A, 41 B, 41 C.
  • Flow path B is desirable to alleviate an undesirable vacuum condition within the vapor space 18 of the fuel tank 12.
  • the poppet valve assembly 74 is shown during normal operation in a fully open position.
  • the first cam 90 is rotated to a position wherein the high lift surface 102 urges the pin 130 to be depressed or translated leftward as viewed in the FIGS. Translation of the pin 130 causes the poppet 120 to be lifted off of sealing engagement with the inner lip seal 154 of the seal member 124 and into the bias of the first biasing member 140.
  • the poppet 120 is in the open position, the vapor flow is permitted along flow path A into the vent line port 50 and out of the canister port 73. Fuel vapor from the vapor space 18 is caused to be vented to the canister 32.
  • the poppet valve assembly 74 is shown during normal operation in a fully closed position.
  • the first cam 90 is rotated to a position wherein the low lift surface 104 aligned with the pin 130 such that bias of the first biasing member 140 causes the pin to be translated rightward as viewed in the FIGS. Translation of the pin 130 rightward causes the poppet 120 to attain a sealing engagement with the inner lip seal 154 of the seal member 124.
  • the poppet 120 is in the closed position, the vapor flow is inhibited from flowing into the vent line port 50 and out of the canister port 73. Fuel vapor from the vapor space 18 is precluded from venting to the canister 32. Flow along either of flow paths A or B is inhibited.
  • the poppet valve assembly 74 is shown during an over pressure relief (OPR) condition.
  • OPR over pressure relief
  • pressure within the vapor space 18 of the fuel tank 18 has exceeded a threshold wherein vapor pressure in the fuel tank 12 is great enough to cause the seal member 124 to be lifted off of a sealed position with the carrier 136.
  • the threshold can be around 14kPa for a conventional fuel vehicle and around 37kPa for a pressurized/hybrid vehicle.
  • the seal member 124 is caused to translate rightward as viewed in the FIGS such that the outer lip seal 156 moves off of a sealed relationship with the carrier 136.
  • the outer lip seal 156 acts as an OPR seal.
  • fuel vapor from the vapor space 18 is caused to flow along flow path A and be vented to the canister 32.
  • the seal member 124 can move rightward in an OPR condition without any command from the controller 30.
  • the poppet valve assembly 74 is shown during an over vacuum relief (OVR) condition.
  • OVR over vacuum relief
  • pressure within the vapor space 18 of the fuel tank 18 has dropped below a threshold wherein vapor pressure in the fuel tank is low enough to cause a vacuum wherein the poppet 120 is lifted off of sealing engagement with the inner lip seal 154 of the seal member 124 and into the bias of the first biasing member 140.
  • the poppet 120 is in the open position, the vapor flow is permitted to equalize pressures. In other words, vapor is permitted to flow along flow path B (from the canister 32 through the canister line 89) out of the vent line port 50 and into the vapor space 18.
  • the poppet 120 can move leftward in an OVR condition without any command from the controller 30.
  • the pump 80 can be a piston pump or any pump suitable to pump liquid fuel out of the vent shut off assembly 22.
  • the pump can be configured to pump 1 -3 cubic centimeters of liquid fuel per cycle and have a maximum pump rate of around 8.3 cubic centimeters per minute.
  • the evaporative emissions control system 20 can replace conventional fuel tank systems that require mechanical components including in-tank valves with an electronically controlled module that manages the complete evaporative system for a vehicle.
  • some components that may be eliminated using the evaporative emissions control system 20 of the instant disclosure can include in-tank valves such as GW’s and FLW’s, canister vent valve solenoid and associated wiring, tank pressure sensors and associated wiring, fuel pump driver module and associated wiring, fuel pump module electrical connector and associated wiring, and vapor management valve(s) (system dependent). These eliminated components are replaced by the control module 30, vent shut-off assembly 22, manifold 24, and associated electrical connector 44.
  • Various other components may be modified to accommodate the evaporative emissions control system 20 including the fuel tank 12.
  • the fuel tank 12 may be modified to eliminate valves and internal lines to pick-up points.
  • the flange of the FDM 46 may be modified to accommodate other components such as the control module 30 and/or the electrical connector 44.
  • the fresh air line of the canister 32 and a dust box may be modified.
  • the fresh air line of the canister 32 and the dust box may be connected to the control module 30.
  • FIG. 13 a vent shut-off assembly constructed in accordance to another example of the present disclosure is shown and generally identified by reference numeral 222A.
  • the vent shut-off assembly 222A includes a poppet valve assembly 274 that is actuated by a first solenoid 230A and a pump or drain 280 that is actuated by a second solenoid 232A.
  • the first solenoid 230A includes a first plunger 240A that communicates with the poppet valve assembly 274.
  • the second solenoid 232A includes a second plunger 240B that communicates with the drain 280.
  • Operation of the vent shut-off assembly 222A can be similar to the vent shut off assembly 22 except instead of a cam assembly 76, the poppet valve assembly 274 and the pump 280 are actuated by the first and second solenoid 230A, 232A respectively.
  • the configuration and operation of the poppet valve assembly 274 can be similar to described above with poppet valve assembly 74.
  • the pump 280 can operate similar to the pump 80.
  • Solenoids provide quiet operation, miniature size for space- restricted application and long life with extremely consistent and dependable operation. Solenoids provide exceptional force and torque along with simplified control and uncompromising reliability.
  • the solenoids 230A, 232A can be independently controlled such as by controller 30 (FIG. 1 ).
  • FIG. 14 a vent shut-off assembly constructed in accordance to another example is shown and generally identified at reference 222C.
  • the vent shut-off assembly 222C includes a poppet valve assembly 274 and a pump 280 that are both actuated by a first solenoid 230C.
  • the first solenoid 230C is a ninety degree solenoid that provides independent translation of a first and a second plunger 240A and 240B, respectively.
  • FIGS. 13 and 14 show the solenoids mounted within a main housing 270A and 270C. It will be appreciated that the solenoids can alternatively be mounted in a top housing 272A and 272C as will be shown in various examples herein.
  • the vent shut-off assembly 322A comprises a first solenoid 330A and a second solenoid 332A.
  • the vent shut-off assembly 322A includes a poppet valve assembly 374A that is actuated by the first solenoid 330A and a pump or drain 380A that is actuated by the second solenoid 332A.
  • the first solenoid 330A includes a first plunger 340A that communicates with the poppet valve assembly 374A.
  • the second solenoid 332A includes a second plunger 342A that communicates with the drain 380A.
  • both solenoids 330A and 332A are securely coupled and arranged on a top housing 372A.
  • a main housing 370A can be arranged to cover the first and second solenoids 330A and 332A when assembled (as best illustrated in FIG. 16).
  • the top housing 372A comprises an integrally formed retaining box 390A that has a series of fingers 392A configured to slidably flex outwardly while receiving the second solenoid 332A into the retaining box 390A and rebound to a static position where tabs 394A secure the second solenoid 332A in a retained position within the retaining box 390A.
  • the operation of the vent shut-off assembly 322A is similar to the vent shut-off assembly 22 discussed herein with the exception of the dual solenoid actuation rather than the mechanical cam configuration.
  • FIGS. 15 - 17 The architectural illustration shown in FIGS. 15 - 17 provides improved and/or independent operation of the first and second solenoids 330A, 332A and improved control.
  • the design is flexible such that solenoids can be selected based on a particular application.
  • the example shown in FIGS. 15 - 17 provides high response time, low/no noise operation and moderate liquid trap volume.
  • the vent shut-off assembly 322B comprises a first solenoid 330B and a second solenoid 332B.
  • the vent shut-off assembly 322B includes a poppet valve assembly 374B that is actuated by the first solenoid 330B and a pump or drain 380B that is actuated by the second solenoid 332B.
  • the first solenoid 330B includes a first plunger 340B that communicates with the poppet valve assembly 374B.
  • the second solenoid 332B includes a second plunger 342B that communicates with the drain 380B.
  • both solenoids 330B and 332B are securely coupled and arranged on a top housing 372B.
  • a main housing 370B can be arranged to cover the first and second solenoids 330B and 332B when assembled (as best illustrated in FIG. 19).
  • the top housing 372B comprises an integrally formed retaining box 390B that is generally in the form of a series of fingers configured to receive the second solenoid 332B.
  • the operation of the vent shut-off assembly 322B is similar to the vent shut-off assembly 22 discussed herein with the exception of the dual solenoid actuation rather than the mechanical cam configuration.
  • FIGS. 18 - 20 The architectural illustration shown in FIGS. 18 - 20 provides improved and/or independent operation of the first and second solenoids 330B, 332B and improved control.
  • the design is flexible such that solenoids can be selected based on a particular application.
  • the example shown in FIGS. 18 - 20 provides high response time, low/no noise operation and moderate liquid trap volume.
  • the vent shut-off assembly 322C comprises a first solenoid 330C and a second solenoid 332C.
  • the vent shut-off assembly 322C includes a poppet valve assembly 374C that is actuated by the first solenoid 330C and a pump or drain 380C that is actuated by the second solenoid 332C.
  • the first solenoid 330C includes a first plunger 340C that communicates with the poppet valve assembly 374C.
  • the second solenoid 332C includes a second plunger 342C that communicates with the drain 380C.
  • both solenoids 330C and 332C are securely coupled and arranged on a top housing 372C.
  • a main housing 370C can be arranged to cover the first and second solenoids 330C and 332C when assembled (as best illustrated in FIG. 22).
  • the top housing 372C comprises a series of integrally formed boss extensions 390C configured to receive screws extending through complementary mounting ears 392C defined on both of the first and second solenoids 330A, 332B.
  • the operation of the vent shut-off assembly 322B is similar to the vent shut-off assembly 22 discussed herein with the exception of the dual solenoid actuation rather than the mechanical cam configuration.
  • FIGS. 21 - 23 The architectural illustration shown in FIGS. 21 - 23 provides improved and/or independent operation of the first and second solenoids 330C, 332C and improved control.
  • the design is flexible such that solenoids can be selected based on a particular application.
  • the example shown in FIGS. 21 - 23 provides high response time, low/no noise operation and moderate liquid trap volume.
  • the vent shut-off assembly 322D comprises a first solenoid 330D and a second solenoid 332D.
  • the vent shut-off assembly 322D includes a poppet valve assembly 374D that is actuated by the first solenoid 330D and a pump or drain 380D that is actuated by the second solenoid 332D.
  • the first solenoid 330D includes a first plunger 340D that communicates with the poppet valve assembly 374D.
  • the second solenoid 332D includes a second plunger 342D that communicates with the drain 380D.
  • both solenoids 330D and 332D are securely coupled and arranged on a top housing 372D.
  • a main housing 370D can be arranged to cover the first and second solenoids 330D and 332D when assembled (as best illustrated in FIG. 25).
  • the top housing 372D comprises a series of integrally formed boss extensions 390D configured to receive screws extending through complementary mounting ears 392D defined on both of the first and second solenoids 330D, 332D.
  • the operation of the vent shut-off assembly 322D is similar to the vent shut-off assembly 22 discussed herein with the exception of the dual solenoid actuation rather than the mechanical cam configuration.
  • FIGS. 24 - 26 The architectural illustration shown in FIGS. 24 - 26 provides improved and/or independent operation of the first and second solenoids 330D, 332D and improved control.
  • the design is flexible such that solenoids can be selected based on a particular application.
  • the example shown in FIGS. 24 - 26 provides high response time, low/no noise operation and moderate liquid trap volume.
  • the vent shut-off assembly 322E comprises a first solenoid 330E and a second solenoid 332E.
  • the vent shut-off assembly 322E includes a poppet valve assembly 374E that is actuated by the first solenoid 330E and a pump or drain 380E that is actuated by the second solenoid 332E.
  • the first solenoid 330E includes a first plunger 340E that communicates with the poppet valve assembly 374E.
  • the second solenoid 332E includes a second plunger 342E that communicates with the drain 380E.
  • both solenoids 330E and 332E are securely coupled and arranged on a top housing 372E.
  • a main housing 370E can be arranged to cover the first and second solenoids 330E and 332E when assembled (as best illustrated in FIG. 28).
  • the top housing 372E comprises a series of integrally formed boss extensions 390E configured to receive screws extending through complementary mounting ears 392E defined the second solenoid 332E.
  • a u-channel receiving structure 394E can be arranged on the top housing 372E for receiving the first solenoid 330E.
  • the u-channel receiving structure 394E can be configured to expand and return to a static position when receiving the first solenoid 330E in a secure position.
  • the operation of the vent shut-off assembly 322E is similar to the vent shut-off assembly 22 discussed herein with the exception of the dual solenoid actuation rather than the mechanical cam configuration.
  • FIGS. 27 - 29 The architectural illustration shown in FIGS. 27 - 29 provides improved and/or independent operation of the first and second solenoids 330E, 332E and improved control.
  • the design is flexible such that solenoids can be selected based on a particular application.
  • the example shown in FIGS. 27 - 29 provides high response time, low/no noise operation and moderate liquid trap volume.
  • the vent shut-off assembly 322F comprises a first solenoid 330F and a second solenoid 332F.
  • the vent shut-off assembly 322F includes a poppet valve assembly 374F that is actuated by the first solenoid 330F and a pump or drain 380F that is actuated by the second solenoid 332F.
  • the first solenoid 330F includes a first plunger 340F that communicates with the poppet valve assembly 374F.
  • the second solenoid 332F includes a second plunger 342F that communicates with the drain 380F.
  • both solenoids 330F and 332F are securely coupled and arranged on a top housing 372F.
  • a main housing 370F can be arranged to cover the first and second solenoids 330F and 332F when assembled (as best illustrated in FIG. 32).
  • the top housing 372F comprises an integrally formed retaining boxes 390F that receive the respective first and second solenoids 330F and 332F.
  • the operation of the vent shut-off assembly 322F is similar to the vent shut-off assembly 22 discussed herein with the exception of the dual solenoid actuation rather than the mechanical cam configuration.
  • FIGS. 30 - 32 The architectural illustration shown in FIGS. 30 - 32 provides improved and/or independent operation of the first and second solenoids 330F, 332F and improved control.
  • the design is flexible such that solenoids can be selected based on a particular application.
  • the example shown in FIGS. 30 - 32 provides high response time, low/no noise operation and moderate liquid trap volume.
  • the vent shut-off assembly 322G comprises a first solenoid 330G and a second solenoid 332G.
  • the vent shut-off assembly 322G includes a poppet valve assembly 374G that is actuated by the first solenoid 330G and a pump or drain 380G that is actuated by the second solenoid 332G.
  • the first solenoid 330G includes a first plunger 340G that communicates with the poppet valve assembly 374G.
  • the second solenoid 332G includes a second plunger 342G that communicates with the drain 380G.
  • both solenoids 330G and 332G are securely coupled and arranged on a top housing 372G.
  • a main housing 370G can be arranged to cover the first and second solenoids 330G and 332G when assembled (as best illustrated in FIG. 34).
  • the top housing 372G comprises an integrally formed retaining boxes 390F that receive the respective first and second solenoids 330G and 332G.
  • One or both of the boxes can include ears 392G configured to align with bosses 393G.
  • the operation of the vent shut-off assembly 322G is similar to the vent shut-off assembly 22 discussed herein with the exception of the dual solenoid actuation rather than the mechanical cam configuration.
  • FIGS. 33 - 35 The architectural illustration shown in FIGS. 33 - 35 provides improved and/or independent operation of the first and second solenoids 330G, 332G and improved control.
  • the design is flexible such that solenoids can be selected based on a particular application.
  • the example shown in FIGS. 33 - 35 provides high response time, low/no noise operation and moderate liquid trap volume.
  • the vent shut-off assembly 322H comprises a first or single solenoid 330H.
  • the vent shut-off assembly 322H includes a poppet valve assembly 374H that is actuated by the single solenoid 330H and a pump or drain 380H that is actuated by the single solenoid 330H.
  • the single solenoid 330H includes a first plunger 340H that communicates with the poppet valve assembly 374H and a second plunger 342H that communicates with the drain 380H.
  • the single solenoid 330H is securely coupled and arranged on a top housing 372H.
  • a main housing 370H can be arranged to cover the single solenoid 330H when assembled (as best illustrated in FIG. 37).
  • the top housing 372H can include any integrally formed retaining structures such as described herein for securing the single solenoid 330H.
  • the operation of the vent shut-off assembly 322H is similar to the vent shut-off assembly 22 discussed herein with the exception of the single solenoid actuation rather than the mechanical cam configuration.
  • FIGS. 36 - 39 The architectural illustration shown in FIGS. 36 - 39 provides improved and/or independent operation of the first solenoid 330H and improved control.
  • the design is flexible such that solenoids can be selected based on a particular application.
  • the example shown in FIGS. 36 - 39 provides high response time, low/no noise operation and moderate liquid trap volume.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)

Abstract

Un ensemble d'arrêt de mise à l'air libre conçu pour gérer la mise à l'air libre d'un réservoir de carburant conçu pour distribuer du carburant à un moteur à combustion interne comprend un premier discriminateur de vapeur de liquide (LVD), un logement principal, un ensemble soupape champignon et un actionneur comprenant un premier solénoïde. Le LVD est disposé dans le réservoir de carburant. Le logement principal assure une mise à l'air libre sélective vers un canister. L'ensemble soupape champignon comprend une soupape champignon disposée dans le logement principal. L'ensemble actionneur est au moins partiellement logé dans le logement principal. Le premier solénoïde ouvre et ferme une soupape champignon couplée de manière fluidique au premier LVD. Lorsque la soupape champignon est en position fermée, elle empêche la vapeur de passer entre le réservoir de carburant et la cartouche. Lorsque la soupape champignon est en position ouverte, elle laisse passer la vapeur entre le réservoir de carburant et le canister.
PCT/EP2019/025449 2018-12-10 2019-12-10 Système de mise à l'air libre de réservoir de carburant à actionnement de limitation de pression et de solénoïde Ceased WO2020119943A1 (fr)

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IN201811046650 2018-12-10
IN201811046650 2018-12-10

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050279406A1 (en) * 2004-06-22 2005-12-22 Atwood Jeffrey M Vehicle fuel system
US20150122347A1 (en) * 2013-11-07 2015-05-07 George J. Marlow Liquid vapor separator drain valve
US20150144819A1 (en) * 2010-03-30 2015-05-28 Eaton Corporation Isolation valve with fast depressurization for high-pressure fuel tank
US20170045019A1 (en) * 2015-08-12 2017-02-16 Ford Global Technologies, Llc System and methods for regulating fuel vapor flow in a fuel vapor recirculation line
US20180087475A1 (en) * 2014-09-24 2018-03-29 Eaton Corporation Electrically controlled fuel system module
CN108407607A (zh) * 2017-12-31 2018-08-17 亚普汽车部件股份有限公司 一种新式电控燃油系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050279406A1 (en) * 2004-06-22 2005-12-22 Atwood Jeffrey M Vehicle fuel system
US20150144819A1 (en) * 2010-03-30 2015-05-28 Eaton Corporation Isolation valve with fast depressurization for high-pressure fuel tank
US20150122347A1 (en) * 2013-11-07 2015-05-07 George J. Marlow Liquid vapor separator drain valve
US20180087475A1 (en) * 2014-09-24 2018-03-29 Eaton Corporation Electrically controlled fuel system module
US20170045019A1 (en) * 2015-08-12 2017-02-16 Ford Global Technologies, Llc System and methods for regulating fuel vapor flow in a fuel vapor recirculation line
CN108407607A (zh) * 2017-12-31 2018-08-17 亚普汽车部件股份有限公司 一种新式电控燃油系统

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