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WO1997019265A2 - Rechauffeur de carburant - Google Patents

Rechauffeur de carburant Download PDF

Info

Publication number
WO1997019265A2
WO1997019265A2 PCT/CA1996/000769 CA9600769W WO9719265A2 WO 1997019265 A2 WO1997019265 A2 WO 1997019265A2 CA 9600769 W CA9600769 W CA 9600769W WO 9719265 A2 WO9719265 A2 WO 9719265A2
Authority
WO
WIPO (PCT)
Prior art keywords
container
fuel
outlet
tube
inlet
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/CA1996/000769
Other languages
English (en)
Other versions
WO1997019265A3 (fr
Inventor
Gordon Bridgeman
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.)
UNIVERSAL DIESEL PRODUCTS Inc
Original Assignee
UNIVERSAL DIESEL PRODUCTS Inc
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 UNIVERSAL DIESEL PRODUCTS Inc filed Critical UNIVERSAL DIESEL PRODUCTS Inc
Priority to AU76147/96A priority Critical patent/AU7614796A/en
Publication of WO1997019265A2 publication Critical patent/WO1997019265A2/fr
Publication of WO1997019265A3 publication Critical patent/WO1997019265A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/10—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot liquids, e.g. lubricants or cooling water
    • F02M31/102—Particular constructional characteristics of the shape of the heat exchange surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/10—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot liquids, e.g. lubricants or cooling water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0606—Fuel temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a heat exchanger for pre ⁇ heating fuel with a heated liquid.
  • That heat exchanger comprises: a container with a cylindrical outer wall and closed ends; a tube formed into a helical coil located within the outer wall, with ends of the tube extending through the container to the exterior thereof, adjacent opposite ends of the container; inlet and outlet fittings connected to the cylindrical outer wall, to open in opposite tangential directions into the container adjacent opposite ends thereof; and a baffle extending along the container, from end to end of the container and within the coil.
  • the baffle is an inner tube, concentric with the outer housing, providing an annular chamber around the coil. This confines the flow of heating fluid to the annular chamber around the coil.
  • a fuel pre-heater of the type described in the foregoing characterized in that: the baffle is of substantially S-shaped cross-section across the container.
  • the spacing between the coil, the baffle and the outer wall is kept to a minimum. Fuel is passed through the coil in counter flow to hot engine coolant passing through the container between the baffle and the outer wall.
  • a fuel heat exchanger so constructed has a number of significant characteristics.
  • the tangential inlet and outlet for heating medium and the helical fuel tube coil cause the heating medium to flow helically through the annular chamber to provide the maximum length of heat transfer path. This provides the highest possible log mean temperature difference.
  • the most important factor in heat transfer is the heat transfer surface area and the second most important factor is the method of using that area.
  • Heat transfer is inhibited when laminar flow exists at the heat transfer surface, as one of the most important factors influencing the amount of heat that can be transmitted through any wall is the film resistance of the fluid at the wall.
  • Film resistance is a function of film thickness, and film thickness is an inverse function of flow rate.
  • the S- shaped baffle is close to the surface of the internal coil at two points, along the longitudinal edges of the baffle. This may be about one half the coil to internal tube spacing in the unit of U.S. patent 4,858,584. As a result, the flow rate should in theory double, thereby increasing the Reynolds number and producing more turbulent flow, which in turn reduces the film coefficient. Additional turbulence and hence film reduction will be caused by turbulence created by the non-uniformity of the baffle itself.
  • the new configuration has been found to heat fuel to an outlet temperature of 186°F (86°C), as compared to the heater of the earlier patent discharging fuel at 1 70°F (77 °C).
  • the total heat transferred with the new configuration is approximately 666 Btu (7 x 10 5 joules) per hour as compared to approximately 588 Btu (6.2 x 10 5 joules) per hour with the internal tube.
  • a diesel engine may be fitted with a smaller unit to accomplish the desired diesel fuel temperature increase.
  • the smaller units are more easily fitted to all engines. There are cost savings for the manufacturer as less steel is required to produce similar results.
  • Another characteristic of preferred embodiments of the present invention is an electric heater element extending into the container, within the coil, from one end of the container.
  • a fuel pre-heater comprising a container with a cylindrical outer wall and closed ends and a fuel tube formed into a helical coil located between the outer wall, with the tube having inlet and outlet ends extending through the container to the exterior thereof, adjacent opposite ends of the container is characterized by: temperature sensor means for sensing the temperature of fuel in the fuel tube at the outlet end of the tube; valve means for controlling coolant flow through the coolant inlet and outlet fittings; « and valve operating means responsive to temperatures sensed by the temperature sensor means for operating the valve means.
  • the sensor will detect a fuel outlet temperature that is sufficient that further pre-heating is not required. The valve will then shut off the coolant flow until the outlet temperature drops below that desired.
  • Figure 1 is an isometric view of a fuel heat exchanger according to the present invention
  • Figure 2 is a side elevation with the outer wall shown in section of the heat exchanger in Figure 1 ;
  • Figure 3 is a schematic view of the connections of the heat exchanger to an internal combustion engine
  • FIG. 4 is an isometric view of the baffle
  • Figure 5 is a cross-section along line 5-5 of Figure 2.
  • a heat exchanger 10 that is housed within a container 12 defined by a cylindrical outer wall 14 and two circular end walls 16 and 18.
  • the end wall 16 has a clean-out and bleed opening closed by a plug 20.
  • Two mounting brackets 22 of L-shape are mounted on the respective ends of the heat exchanger.
  • the cylindrical outer wall 14 of the container 12 is fitted with tangential inlet and outlet nipples 24 and 26 respectively.
  • the inlet nipple 24 is located adjacent the end 18, while the outlet nipple 26 is located adjacent the end 16.
  • the two nipples project in opposite tangential directions from the container.
  • a fuel inlet tube 28 projects through the end 16 of the container 12, adjacent the periphery of the wall, while a fuel outlet 30 projects through the end 18, also adjacent the periphery of that wall.
  • the inlet and outlet 28 and 30 are the opposite ends of a fuel tube 32 that is formed into a coil 34 inside the container 12.
  • the coil 34 surrounds an inner baffle 36 that extends between the ends 16 and 18 of the container 12.
  • the baffle has an S-shaped cross-section as seen in Figures 4 and 5. The longitudinal edges 38 and 40 of the S-shaped baffle are directed away from the inlet and outlet 28 and 30.
  • fuel is supplied to the fuel inlet 28 to flow internally through the helical coil 34 to the fuel outlet 30.
  • a heating medium such as engine coolant, is supplied to the container through the tangential inlet 24.
  • the flow is caused by the helical coil 34 to flow in a swirling path, following the coil to the outlet 26 at the opposite end of the heat exchanger.
  • the close spacing between the baffle and the coil ensures that this flow travels at high velocity in the vicinity of the coil
  • an electric heater 42 extends into the container 12 through the end 1 6 associated with the fuel inlet 28 and the coolant outlet 26.
  • This heater is of a conventional type and is shaped into a U extending along an axial slot 44 in the center of the baffle 36. The heater is mains powered to heat the coolant in the pre-heater before starting the engine.
  • a temperature sensor 46 mounted on the fuel outlet 30 to monitor the temperature of the fuel leaving the pre-heater. Also at this end of the pre-heater is a valve 48 mounted on the coolant inlet 24. This is a shut-off valve operated by an electric valve actuator 50. The actuator is connected to the temperature sensor 46 and to an electrical supply from the vehicle through a connector 52 on the end of the heater.
  • the temperature sensor 46 monitors the outlet fuel temperature and, when it reaches a sufficient level that further heating is not required, the sensor closes the electric circuit to the actuator 50, causing it to shut off the valve 48 and the coolant supply to the pre-heater. If the fuel temperature drops sufficiently, the sensor will open once again, allowing the valve 46 to re-open and supply hot coolant to the pre-heater.
  • FIG. 3 illustrates the use of the heat exchanger in connection with an internal combustion engine 53.
  • the engine has a coolant pump 54 that pumps the engine coolant from the radiator 56 through a line 58 to the low water jacket 60 of the engine 53.
  • a line 62 allows hot engine coolant to flow from the high water jacket 64 to the top of the radiator 56 when the engine thermostat is in the open position.
  • a hot coolant line 68 leads from
  • SUBSTITUTE SHEET (RULE 26) the high water jacket 64 of the engine 53 to the heating medium inlet 24 of the heat exchanger 10.
  • a second coolant return line 70 leads from the outlet 26 of the heat exchanger 10 to the suction side of the water pump 54..
  • a fuel tank 72 is connected to a fuel line 74 leading to the fuel inlet 28 of the heat exchanger 10, while a further fuel line 76 leads the heated fuel from the heat exchanger 10 to a fuel filter 78. From the fuel filter 78 a fuel line 80 leads the heated fuel to a schematically illustrated fuel atomizing device 82 of the engine 53 which, for a diesel engine, is a set of fuel injectors.
  • the heat exchanger 10 may also be installed after the fuel filter 78 and before the atomizing device 82.
  • a return line 84 from the atomizing device to the fuel tank 72 supplies excess warm fuel to the fuel tank to prevent gelling in gold weather.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Cette invention concerne un réchauffeur utilisé pour chauffer le carburant et destiné aux moteurs à combustion interne, particulièrement aux moteurs Diesel. Ce réchauffeur comporte un boîtier (12) externe, cylindrique et allongé enfermant une chicane (36) en forme de S. Un tube (32) à carburant, qui a la forme d'un serpentin disposé sur toute la longueur du boîtier, possède des orifices d'entrée (28) et de sortie (30) ménagés à travers les extrémités (16, 18) du boîtier. Les mamelons des orifices d'entrée (24) et de sortie (26) du milieu chauffant destiné au boîtier sont disposés tangentiellement, au niveau des extrémités opposées du boîtier, et orientées dans des directions opposées. Les orifices d'entrée et de sortie du milieu chauffant sont reliés au système de refroidissement du moteur à combustion interne tandis que les orifices d'entrée et de sortie du carburant sont reliés à la conduite de carburant aboutissant aux injecteurs de carburant ou au carburateur du moteur. Ce réchauffeur, avec son circuit long et son schéma de circulation à contre-courant, produit un transfert de chaleur extrêmement efficace du milieu de refroidissement au carburant. Dans les réalisations préférées de l'invention, un dispositif de chauffage électrique (42) peut être installé sur le boîtier et est conçu pour le chauffage précédant le démarrage. Un capteur (46) de température surveille la température de sortie du carburant et commande une vanne (48) disposée au niveau de l'orifice d'entrée (24) du fluide de refroidissement, fermant ladite vanne lorsque le carburant a atteint la température souhaitée.
PCT/CA1996/000769 1995-11-21 1996-11-21 Rechauffeur de carburant Ceased WO1997019265A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU76147/96A AU7614796A (en) 1995-11-21 1996-11-21 Fuel pre-heater

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56075795A 1995-11-21 1995-11-21
US08/560,757 1995-11-21

Publications (2)

Publication Number Publication Date
WO1997019265A2 true WO1997019265A2 (fr) 1997-05-29
WO1997019265A3 WO1997019265A3 (fr) 1997-07-31

Family

ID=24239242

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1996/000769 Ceased WO1997019265A2 (fr) 1995-11-21 1996-11-21 Rechauffeur de carburant

Country Status (3)

Country Link
AU (1) AU7614796A (fr)
WO (1) WO1997019265A2 (fr)
ZA (1) ZA969783B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000061938A1 (fr) * 1999-04-09 2000-10-19 Francisco Carrasco Rivas Dispositif mecanique destine a ameliorer la combustion de gazole et/ou d'essence dans les moteurs de vehicules ou les moteurs stationnaires
KR20020013233A (ko) * 2000-08-12 2002-02-20 한만성 내연기관의 연료 예열장치
KR20030087287A (ko) * 2002-05-08 2003-11-14 강선희 디젤 엔진의 연료가열 장치
CN102022191A (zh) * 2009-09-09 2011-04-20 通用电气公司 电子启动加热器、燃气涡轮发电设备及其操作方法
WO2012009582A1 (fr) 2010-07-14 2012-01-19 Scott Taucher Procédé et appareil de modification de carburant par écoulement de liquide de refroidissement vers le catalyseur
CN107165757A (zh) * 2017-05-12 2017-09-15 重庆康明斯发动机有限公司 一种发动机冷却液加热装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1101284A (fr) * 1980-06-06 1981-05-19 Rejean Gendron Traduction non-disponible
DE3637483C1 (en) * 1986-11-04 1988-01-28 Peter Socha Mixture preparation for carburettor internal combustion engine
US4858584A (en) * 1988-09-27 1989-08-22 Gordon Bridgeman Heat exchanger

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000061938A1 (fr) * 1999-04-09 2000-10-19 Francisco Carrasco Rivas Dispositif mecanique destine a ameliorer la combustion de gazole et/ou d'essence dans les moteurs de vehicules ou les moteurs stationnaires
ES2156813A1 (es) * 1999-04-09 2001-07-16 Rivas Francisco Carrasco Dispositivo mecanico para mejorar la combustion de gasoleo y/o gasolina en motores de vehiculos o de estacionarios.
KR20020013233A (ko) * 2000-08-12 2002-02-20 한만성 내연기관의 연료 예열장치
KR20030087287A (ko) * 2002-05-08 2003-11-14 강선희 디젤 엔진의 연료가열 장치
CN102022191A (zh) * 2009-09-09 2011-04-20 通用电气公司 电子启动加热器、燃气涡轮发电设备及其操作方法
WO2012009582A1 (fr) 2010-07-14 2012-01-19 Scott Taucher Procédé et appareil de modification de carburant par écoulement de liquide de refroidissement vers le catalyseur
EP2593657A4 (fr) * 2010-07-14 2017-03-22 L.L.C. Catalyzed Fuel Technologies Procédé et appareil de modification de carburant par écoulement de liquide de refroidissement vers le catalyseur
CN107165757A (zh) * 2017-05-12 2017-09-15 重庆康明斯发动机有限公司 一种发动机冷却液加热装置

Also Published As

Publication number Publication date
WO1997019265A3 (fr) 1997-07-31
AU7614796A (en) 1997-06-11
ZA969783B (en) 1997-07-21

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