WO2004104397A1 - Verfahren zum betreiben eines verbrennungsmotors, kraftstoffsystem und ein volumenstromregelventil - Google Patents
Verfahren zum betreiben eines verbrennungsmotors, kraftstoffsystem und ein volumenstromregelventil Download PDFInfo
- Publication number
- WO2004104397A1 WO2004104397A1 PCT/EP2004/050586 EP2004050586W WO2004104397A1 WO 2004104397 A1 WO2004104397 A1 WO 2004104397A1 EP 2004050586 W EP2004050586 W EP 2004050586W WO 2004104397 A1 WO2004104397 A1 WO 2004104397A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel
- pressure
- flow
- operating mode
- accumulator
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
- F02M59/366—Valves being actuated electrically
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/023—Means for varying pressure in common rails
- F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
- F02M63/025—Means for varying pressure in common rails by bleeding fuel pressure from the common rail
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
-
- 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
- F02D2200/0602—Fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/31—Control of the fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/08—Introducing corrections for particular operating conditions for idling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
- F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
Definitions
- the invention relates to a method for operating an internal combustion engine with a fuel pressure accumulator.
- the invention further relates to a fuel system for an internal combustion engine with a fuel pressure accumulator, and a volume flow control valve for use in a fuel system.
- fuel is demanded from a tank by means of a fuel pump to advance a downstream high-pressure pump.
- the high-pressure pump is usually driven by the internal combustion engine and loads the fuel into a fuel pressure accumulator (fuel rail).
- the high pressure pump itself is not regulated and requests the fuel made available at its inlet connection in the fuel pressure accumulator.
- a volume flow control valve is provided between the fuel pump and the high-pressure pump, which is controlled by a control unit. Depending on a current flowing in a valve coil of the volume flow control valve, the fuel flow through the volume flow control valve is set.
- the pressure in the fuel pressure accumulator can be set via the amount of fuel made available to the high-pressure pump.
- the volume flow control valve usually has a leak flow when de-energized. This can lead to an undesirable increase in fuel pressure in the fuel pressure accumulator if the injection quantities are very small or e.g. B. no fuel is injected at overrun fuel cutoff. Avoiding the leakage flow in the undisturbed state of the volume flow control valve can only be implemented in a complex manner due to the design and is also undesirable in certain cases if the internal combustion engine runs limp in the event of a failure of the volume flow control valve or the control unit.
- a regulator valve is usually provided on the fuel pressure accumulator, with which the pressure in the fuel pressure accumulator is regulated as a function of an actuating current.
- the regulator valve is actively controlled via the actuating current, so that the pressure in the fuel pressure accumulator is set as a function of the actuating current and as a function of a fuel flow through the regulator valve.
- the fuel flow must exceed a limit so that the regulator valve can operate in a linear range.
- This additional fuel flow through the regulator valve must be required by the high pressure pump in order to be able to operate the regulator valve in the linear range.
- this requires that the high-pressure pump supplies the regulator valve with the minimum flow rate and, moreover, provides the amount required to build up pressure or to maintain the fuel pressure in the fuel pressure accumulator.
- a method for operating an internal combustion engine is provided.
- a fuel pressure accumulator a fuel quantity with a set pressure is made available for injection into a combustion chamber.
- the pressure in the fuel pressure accumulator is generated by a high pressure pump.
- the high pressure pump is supplied with a fuel flow via a volume flow control valve.
- the pressure in the fuel pressure accumulator is regulated to the target pressure by setting the fuel flow of the fuel supplied to the high-pressure pump as a function of the quantity of fuel to be injected and the target pressure.
- the pressure in the fuel pressure accumulator is regulated to the target pressure by adjusting the pressure in the fuel pressure accumulator to the target pressure by releasing fuel from the high-pressure accumulator for a given fuel flow.
- the setpoint pressure in the fuel pressure accumulator is usually set by a volume flow control valve providing a fuel flow that is at least a certain amount above the amount of fuel to be injected. This serves to operate a regulator valve in a linear range, via which fuel from the force of pressure pressure is rather discharged into the low-pressure circuit.
- the regulator valve is controlled by a control variable in such a way that a pressure is set in the fuel pressure accumulator at a specific flow. The fuel is drained into the low pressure circuit of the fuel system.
- the high-pressure pump has to pump a minimum amount of fuel into the fuel pressure accumulator so that the pressure can be adjusted to the setpoint pressure there via the regulator valve.
- This requires a high-pressure pump that is dimensioned in order to ensure sufficient demand.
- the fuel flow that is made available to the high-pressure pump must not be shut off completely or set to any small value, since the volume flow control valve allows a constant leakage flow. This is particularly the case in operating states with little or no injection quantities, e.g. B. with a fuel cut-off, problematic because the pressure in the fuel pressure accumulator rises steadily when the regulator valve is blocked.
- two operating states are provided according to the invention:
- a first operating mode the pressure in the fuel pressure accumulator is regulated to the target pressure. This is done by setting the target pressure only by making the amount of fuel to be injected through the injection valves available to the high-pressure pump. By adjusting the amount of fuel supplied, the pressure in the fuel pressure reservoir can be regulated. In the meantime, the regulator valve is completely blocked and there is no regulated outflow of fuel from the fuel pressure accumulator into the low-pressure circuit.
- the fuel quantity to be injected and the setpoint pressure can be controlled only by regulating the fuel flow through the volume flow control valve.
- a second mode of operation relates to the operation of the internal combustion engine with overrun cutoff, in emergency operation or with very small injection quantities, such as. B. idle.
- the volume flow control valve is not activated, so that the high-pressure pump merely requests the leakage flow through the volume flow control valve into the fuel pressure accumulator. If the amount of fuel supplied due to the leakage flow is greater than the amount of fuel to be injected, the pressure in the fuel pressure accumulator rises above the set pressure. The pressure in the fuel pressure accumulator is then determined by Ab release fuel from the fuel pressure accumulator.
- a pressure control with the aid of the regulator valve to the desired pressure is also possible with very small injection quantities if the regulator valve, through which fuel is released from the fuel pressure accumulator, is not operated in a linear range. With such a pressure control, it is therefore not necessary to provide a minimum residual fuel flow via the high-pressure pump.
- the second operating mode is adopted when the required fuel flow in the fuel pressure accumulator falls below the first fuel flow and / or the first operating mode is entered when the required fuel flow exceeds a second fuel flow.
- the first fuel flow is preferably smaller than the second fuel flow, so that an oscillation between the first operating mode and the second operating mode can be avoided by a hysteresis formed in this way if the fuel flow to be injected is in a limit range.
- a fuel system for an internal combustion engine with a fuel pressure accumulator in order to provide a fuel quantity to be injected with a target pressure.
- the fuel system has a high-pressure pump to generate pressure in the fuel pressure accumulator. It also has a volume flow control valve 1 in order to supply the high-pressure pump with an adjustable fuel flow. Fuel is discharged from the fuel pressure reservoir via a regulator valve. Fs a control unit is provided which is connected to the volume flow control valve in order to adjust the pressure in the fuel pressure accumulator in a first operating mode by the amount of fuel flow of the fuel supplied to the high pressure pump depending on the amount of fuel to be injected and the set pressure.
- the control unit is also connected to the regulator valve in order to block the regulator valve in a first operating mode In a second operating mode, regulating the pressure in the fuel pressure accumulator to the target pressure by removing the fuel from the fuel pressure accumulator.
- the first operating mode relates to the operation of the internal combustion engine under load, the setpoint pressure in the fuel pressure accumulator being set by controlling the volume flow control valve.
- the fuel flow through the volume flow control valve corresponds to the amount of fuel to be injected at a constant load, so that the pressure in the fuel pressure accumulator is maintained.
- the high-pressure pump is essentially supplied with the leakage flow through the volume flow control valve.
- the usual leakage flow is greater than the amount of fuel to be injected in the second operating mode.
- the excess fuel is now discharged from the fuel pressure accumulator via the regulator valve via a pressure control.
- the regulator valve is set in such a way that the desired setpoint pressure depends in a defined manner on the fuel flow of the quantity of fuel to be discharged and on a control current.
- the regulator valve is preferably designed in such a way that in the second operating mode it discharges the excess fuel from the fuel pressure accumulator into a fuel line which connects the volume flow control valve to a low-pressure pump.
- the control unit preferably has a switchover unit in order to switch between the first operating mode and the second operating mode.
- the switchover unit switches to the second operating mode when the fuel flow through the volume flow control valve falls below a first fuel flow and / or into the first operating mode when the fuel flow through the volume flow control valve exceeds a second fuel flow.
- the first fuel flow is preferably less than the second fuel flow. In this way, it can be avoided that oscillation occurs between the first and the second operating mode.
- FIG. 1 is a block diagram of an inventive fuel system
- FIG. 2 shows a diagram to illustrate the dependency of the flow of the volume flow control valve on the control current applied and to clarify component parameters
- FIG. 3 shows a control diagram for the regulator valve for the pressure in the fuel pressure accumulator depending on the flow of the regulator and the control current applied to the regulator
- Figure 4 is a diagram showing the dependence of the flow through the volume flow control valve as a function of the engine speed and the injected fuel mass
- Figure 5 shows a section of the control unit for switching between the first and the second operating state.
- the fuel injection system has a fuel tank 1, from which fuel is supplied to a volume flow control valve 3 via a low-pressure pump 2 and via a feed line 4.
- a pressure relief valve 5 is provided, which discharges fuel into the fuel tank 1 when the fuel pressure in the supply line 4 is too great.
- the volume flow control valve 3 is arranged directly on an inlet of a high-pressure pump 6, which on the off gear of the volume flow control valve 3 provided fuel with a set fuel flow into a fuel pressure tank 7.
- the high pressure pump 6 is coupled to the internal combustion engine, so that the high pressure pump 6 is driven by the internal combustion engine.
- the high pressure pump 6 is able to bring the fuel into the fuel pressure accumulator 7 by applying a high delivery pressure.
- the fuel pressure accumulator 7 is connected to injection valves 8 which, controlled by a control unit 9, inject fuel into the combustion chambers of the internal combustion engine.
- the control unit 9 controls the period of time during which each individual injection valve 8 is open, so that the fuel under pressure in the fuel pressure accumulator 7 is injected into the combustion chamber.
- the control unit 9 controls the volume flow control valve 3 and a regulator valve 10 with control signals.
- a target pressure should prevail in the fuel pressure accumulator 7, which pressure is checked by means of a pressure sensor 11 connected to the control unit 9.
- the pressure in the fuel pressure accumulator 7 is regulated with the aid of the volume flow control valve 3 and the regul atorvenLils 10.
- the fuel discharged via the regulator valve 10 is fed into the supply line 4 between the low-pressure pump 2 and the volume flow control valve 3.
- the volume flow control valve 3 supplies a fuel flow to the high-pressure pump 6, which is larger than is injected into the combustion chambers through the injection valves 8. So that the pressure in the fuel pressure accumulator 7 does not rise above the target pressure, the regulator valve 10 is opened with an actuating current by the control unit 9 such that much fuel quantity required is discharged back into the feed line 4.
- a minimum flow through the regulator valve is necessary so that the pressure in the fuel pressure accumulator 7 can be set as precisely as possible via the regulator valve 10.
- the characteristic curve for the regulator valve 10 is shown in FIG. It can be seen that only when the regulator has a minimum fuel flow Q mln can the pressure P ra ⁇ in the fuel pressure accumulator 7 be adjusted essentially by the control current 9 from the control unit 9. If the fuel flow Q through the regulator valve 10 is less than the minimum fuel flow Q mln, the pressure P ra ⁇ i in the fuel pressure accumulator 7 depends more strongly on the fuel flow Q through the regulator valve 10 and significantly less on the actuating current I reg that is provided by the control device 9 , from.
- the volume flow control valve 3 is controlled by a control current from the control unit 9, so that the flow of the fuel can be adjusted by the magnitude of the control current.
- the volume flow control valve 3 generally has a leak flow when de-energized. This leads to an undesirable increase in fuel pressure, in operating conditions with extremely small or no injection quantities, for. B. in an emergency operation or in overrun cutoff.
- volume flow control valve 7 shows an upper and a lower limit of characteristic curves of essentially identical volume flow control valves. It can be seen that in ranges between 0 to 0.6 A, the volume flow control valve generally does not close completely and thus a leakage flow reaches the fuel pressure accumulator 7 via the high pressure pump 6. If less fuel is injected into the combustion chambers than is made available by this leakage flow, the pressure in the fuel pressure accumulator 7 increases. Since the minimum fuel flow for the regulator valve 10 is not given, the pressure which arises in the fuel pressure accumulator 7 depends on the excess amount of fuel supplied and the set actuating current.
- the fuel flow through the volume flow control valve is shown as a function of the engine speed and the injected fuel quantity Q ⁇ n : .
- the control unit 9 controls the volume flow control valve 3 and the regulator valve 10 according to two operating modes.
- the first mode is defined by the fact that the fuel flow that can be be mars through the volume flow control alve 3 via the high-pressure pump 6 the fuel pressure accumulator 7, substantially the injected Kraf stof ( "quantity.
- the regulator valve 10 is not The setpoint pressure in the fuel pressure accumulator 7 is thus achieved by controlling the fuel flow through the volume flow control valve 3.
- the fuel flow that is supplied to the fuel pressure accumulator 7 therefore becomes essentially the amount of fuel injected correspond.
- the second operating mode is assumed if the minimum flow that flows through the volume flow control valve 3 due to leakage is greater than the amount of fuel to be injected. This is the case in particular in the case of a fuel cut-off when no fuel is injected into the combustion chambers through the injection valves 8. However, this can also be the case in emergency operation or in idle mode, depending on how large the leakage flow of the volume flow control valve is in the de-energized or weakly activated state.
- the pressure in the fuel pressure accumulator 7 would increase continuously with a closed regulator valve and would therefore no longer be able to be controlled by the control unit 9 via the manipulated variable for the volume flow control valve 3.
- the second operating mode provides that the pressure in the fuel pressure accumulator 7 is set via the regulator valve 10.
- the regulator valve 10 is operated in the non-linear range.
- the control current provided by the control unit 9 is adapted to the linear course of the parameters of the regulator valve. In this way, the pressure in the fuel pressure accumulator 7 is essentially determined by the quantity of fuel which the volume flow control valve 3 is carrying due to the leakage and the actuating current from the control unit 9.
- the distinction between two operating modes for the fuel system has the advantage, on the one hand, that the high-pressure pump can be dimensioned smaller, since the regulator valve 1 does not have to be supplied with the minimum fuel flow in normal operation, ie in the first operating mode.
- the regulator valve can have a lower mechanical control quality, since this component is only operated as an additional leak.
- the drive torque can be reduced considerably, especially in the area close to idling, since pilot control of the regulator valve with the minimum fuel flow is not necessary.
- the first operating mode is adopted when the required fuel flow, ie the amount of fuel to be injected, exceeds a first fuel flow
- the second operating mode is adopted when the required fuel flow falls below a second fuel flow.
- the first fuel flow is greater than the second fuel flow so that there is no oscillating change between the first and the second operating mode in the limit region.
- FIG. 5 shows a possible switchover unit 12 which can be provided in the control unit 9 and which is used to provide a hysteresis when switching over between the first and the second operating mode.
- the circuit receives values for a first fuel flow Qi and a second fuel flow Q ? made available.
- the fuel flow through the volume flow control valve 3 corresponds to the instantaneous fuel flow Q.
- a first comparator unit 20 which compares the instantaneous fuel flow Q with the second fuel flow Q? compares and outputs a logical “1” as soon as the instantaneous fuel flow Q is smaller than the second fuel flow Q ?.
- a second comparator device 21 the instantaneous fuel flow Q is compared with the first fuel flow Qi and a logical “1” is output when the instantaneous fuel flow Q exceeds the first fuel flow Qi.
- the output of the first comparator device 20 is connected to a set input of a flip-flop 22. Furthermore, the output of the first comparator device 20 is connected to an input of an AND gate 24 via an inverter 23. An output of the second comparator device 21 is connected to a further input of the AND gate 24.
- An output of the AND gate 24 is connected to a reset input of the flip-flop 22. In this way, the respective operation o be queried.
- a logical "0" corresponds to the first operating mode and a logical "1" to the second operating mode.
- the minimum fuel flow can be determined in overrun mode, ie there is no injection into the combustion chamber.
- the pressure in the fuel pressure accumulator is briefly reduced in overrun mode and the set pressure is then increased again so that there is no fuel flow through the regulator valve.
- Q mln can be calculated from the increase in pressure P ra ⁇ i (t) in the fuel pressure accumulator.
- the determined minimum fuel flow Q ml corresponds to the leakage through the volume flow control valve. If the fuel pressure in the fuel pressure accumulator increases by ⁇ p during the time T, the following formula results for overrun operation and for a closed regulator valve:
- the minimum fuel flow Q mln can be calculated from this according to the formula given above. As a further alternative, the minimum fuel flow can also be determined if the volume flow control valve is not activated during the time T, there is no flow through the regulator valve, and the fuel quantity m ln - is injected.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020057022590A KR101086170B1 (ko) | 2003-05-26 | 2004-04-22 | 내연기관, 연료 시스템 및 체적유동 제어밸브를 작동시키는방법 |
| US10/557,526 US7302935B2 (en) | 2003-05-26 | 2004-04-22 | Method for operating an internal combustion engine, fuel system, and volume flow control valve |
| DE502004001622T DE502004001622D1 (de) | 2003-05-26 | 2004-04-22 | Verfahren zum betreiben eines verbrennungsmotors, kraftstoffsystem und ein volumenstromregelventil |
| EP04728820A EP1629187B1 (de) | 2003-05-26 | 2004-04-22 | Verfahren zum betreiben eines verbrennungsmotors, kraftstoffsystem und ein volumenstromregelventil |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10323874.3 | 2003-05-26 | ||
| DE10323874A DE10323874A1 (de) | 2003-05-26 | 2003-05-26 | Verfahren zum Betreiben eines Verbrennungsmotors, Kraftstoffsystem und ein Volumenstromregelventil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004104397A1 true WO2004104397A1 (de) | 2004-12-02 |
Family
ID=33461887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2004/050586 Ceased WO2004104397A1 (de) | 2003-05-26 | 2004-04-22 | Verfahren zum betreiben eines verbrennungsmotors, kraftstoffsystem und ein volumenstromregelventil |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7302935B2 (de) |
| EP (1) | EP1629187B1 (de) |
| KR (1) | KR101086170B1 (de) |
| DE (2) | DE10323874A1 (de) |
| WO (1) | WO2004104397A1 (de) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005098221A3 (de) * | 2004-04-06 | 2007-04-26 | Siemens Ag | Verfahren zum steuern einer kraftstoffzuführeinrichtung einer brennkraftmaschine |
| DE102006023468B3 (de) * | 2006-05-18 | 2007-09-13 | Siemens Ag | Verfahren und Vorrichtung zur Steuerung eines Einspritzventils eines Verbrennungsmotors |
| WO2008090033A1 (de) * | 2007-01-24 | 2008-07-31 | Continental Automotive Gmbh | Verfahren zum regeln einer kraftstoffzuführeinrichtung für eine brennkraftmaschine |
| WO2009056402A1 (de) * | 2007-10-31 | 2009-05-07 | Continental Automotive Gmbh | Verfahren zur erkennung einer kraftstoffsorte |
| WO2011082938A1 (de) * | 2010-01-08 | 2011-07-14 | Continental Automotive Gmbh | Vorrichtung zur verhinderung des absterbens des motors bei einem mit einem dieseleinspritzsystem ausgestatteten fahrzeug |
| EP2946998A4 (de) * | 2013-01-15 | 2017-01-25 | Yanmar Co., Ltd. | Schiff |
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| DE102004045738B4 (de) * | 2004-09-21 | 2013-05-29 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Steuern einer Brennkraftmaschine |
| DE102004049812B4 (de) * | 2004-10-12 | 2017-09-14 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Kraftstoffeinspritzanlage insbesondere eines Kraftfahrzeugs |
| DE102005008364B3 (de) * | 2005-02-23 | 2006-08-03 | Siemens Ag | Verfahren und Vorrichtung zur Ermittlung der Kraftstoffdruckwerte eines Kraftstoffhochdrucksystems |
| DE102005014161B4 (de) * | 2005-03-29 | 2007-10-31 | Siemens Ag | Verfahren und Vorrichtung zur Ermittlung der Kraftstoffdruckwerte eines Kraftstoffhochdrucksystems |
| DE102006018164B3 (de) * | 2006-04-19 | 2007-08-30 | Siemens Ag | Verfahren und Vorrichtung zur Steuerung einer Einspritzanlage für eine Brennkraftmaschine |
| WO2008088889A1 (en) * | 2007-01-18 | 2008-07-24 | Tekelec | Methods, systems, and computer program products for routing a short message service (sms) message from a 2g network to a session initiation protocol (sip)-based network |
| DE102007060006B3 (de) | 2007-12-13 | 2009-07-09 | Continental Automotive Gmbh | Kraftstoffdruckregelsystem |
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| DE102010064374B3 (de) * | 2010-12-30 | 2012-07-12 | Continental Automotive Gmbh | Kraftstoffeinspritzsystem einer Brennkraftmaschine sowie dazugehöriges Druckregelverfahren, Steuergerät und Kraftfahrzeug |
| DE102013203490B4 (de) | 2012-11-09 | 2025-08-14 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Verbrennungsmotors in einem Notfahrbetrieb |
| US9587581B2 (en) * | 2013-06-20 | 2017-03-07 | GM Global Technology Operations LLC | Wideband diesel fuel rail control using active pressure control valve |
| DE102013218505A1 (de) * | 2013-09-16 | 2015-03-19 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Verbrennungsmotors in einem Notfahrbetrieb |
| DE102013221981A1 (de) * | 2013-10-29 | 2015-04-30 | Robert Bosch Gmbh | Verfahren zur Steuerung eines Druckregelventils einer Kraftstoffeinspritzanlage insbesondere eines Kraftfahrzeugs |
| DE102014005014A1 (de) | 2014-04-05 | 2015-10-08 | Daimler Ag | Verfahren zum Betreiben einer Kraftstoffversorgungseinrichtung einer Verbrennungskraftmaschine |
| DE102015205586B3 (de) * | 2015-03-27 | 2016-04-07 | Continental Automotive Gmbh | Hochdruckeinspritzvorrichtung für einen Verbrennungsmotor |
| DE102016211551A1 (de) * | 2016-06-28 | 2017-12-28 | Robert Bosch Gmbh | Verfahren zum Ermitteln eines Korrekturwertes für eine Kraftstoffzumessung eines Kraftstoffinjektors |
| DE102019202004B4 (de) * | 2019-02-14 | 2025-07-03 | Rolls-Royce Solutions GmbH | Verfahren zum Betreiben eines Einspritzsystems einer Brennkraftmaschine, Einspritzsystem für eine Brennkraftmaschine sowie Brennkraftmaschine mit einem solchen Einspritzsystem |
| CN114592985B (zh) * | 2022-03-21 | 2022-11-08 | 中国第一汽车股份有限公司 | 一种多次喷射喷油控制方法、车辆及存储介质 |
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| US6647965B1 (en) * | 2003-01-08 | 2003-11-18 | Robert H. Breeden | Pump assembly and method |
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- 2003-05-26 DE DE10323874A patent/DE10323874A1/de not_active Withdrawn
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2004
- 2004-04-22 KR KR1020057022590A patent/KR101086170B1/ko not_active Expired - Fee Related
- 2004-04-22 DE DE502004001622T patent/DE502004001622D1/de not_active Expired - Lifetime
- 2004-04-22 US US10/557,526 patent/US7302935B2/en not_active Expired - Lifetime
- 2004-04-22 EP EP04728820A patent/EP1629187B1/de not_active Expired - Lifetime
- 2004-04-22 WO PCT/EP2004/050586 patent/WO2004104397A1/de not_active Ceased
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| DE19714489C1 (de) * | 1997-04-08 | 1998-10-01 | Siemens Ag | Einspritzsystem, Druckventil und Volumenstromregelventil und Verfahren zum Regeln eines Kraftstoffdruckes |
| EP1273780A2 (de) * | 2001-07-02 | 2003-01-08 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005098221A3 (de) * | 2004-04-06 | 2007-04-26 | Siemens Ag | Verfahren zum steuern einer kraftstoffzuführeinrichtung einer brennkraftmaschine |
| US7624719B2 (en) | 2004-04-06 | 2009-12-01 | Siemens Aktiengesellschaft | Method for controlling a fuel supplying device of an internal combustion engine |
| DE102006023468B3 (de) * | 2006-05-18 | 2007-09-13 | Siemens Ag | Verfahren und Vorrichtung zur Steuerung eines Einspritzventils eines Verbrennungsmotors |
| US7913666B2 (en) | 2006-05-18 | 2011-03-29 | Continental Automotive Gmbh | Method and device for controlling an injection valve of an internal combustion engine |
| WO2008090033A1 (de) * | 2007-01-24 | 2008-07-31 | Continental Automotive Gmbh | Verfahren zum regeln einer kraftstoffzuführeinrichtung für eine brennkraftmaschine |
| WO2009056402A1 (de) * | 2007-10-31 | 2009-05-07 | Continental Automotive Gmbh | Verfahren zur erkennung einer kraftstoffsorte |
| WO2011082938A1 (de) * | 2010-01-08 | 2011-07-14 | Continental Automotive Gmbh | Vorrichtung zur verhinderung des absterbens des motors bei einem mit einem dieseleinspritzsystem ausgestatteten fahrzeug |
| EP2946998A4 (de) * | 2013-01-15 | 2017-01-25 | Yanmar Co., Ltd. | Schiff |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1629187B1 (de) | 2006-09-27 |
| KR20060015625A (ko) | 2006-02-17 |
| US20060288984A1 (en) | 2006-12-28 |
| EP1629187A1 (de) | 2006-03-01 |
| DE10323874A1 (de) | 2004-12-30 |
| KR101086170B1 (ko) | 2011-11-25 |
| DE502004001622D1 (de) | 2006-11-09 |
| US7302935B2 (en) | 2007-12-04 |
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