WO2009130153A1 - Dispositif et procédé de répartition du carburant et moteur à combustion interne équipé de celui-ci - Google Patents

Dispositif et procédé de répartition du carburant et moteur à combustion interne équipé de celui-ci Download PDF

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Publication number
WO2009130153A1
WO2009130153A1 PCT/EP2009/054497 EP2009054497W WO2009130153A1 WO 2009130153 A1 WO2009130153 A1 WO 2009130153A1 EP 2009054497 W EP2009054497 W EP 2009054497W WO 2009130153 A1 WO2009130153 A1 WO 2009130153A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
way valve
storage device
internal combustion
combustion engine
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/EP2009/054497
Other languages
German (de)
English (en)
Inventor
Reinhard Barth
Sebastian Gast
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.)
Aumovio Germany GmbH
Original Assignee
Continental Automotive Technologies GmbH
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 Continental Automotive Technologies GmbH filed Critical Continental Automotive Technologies GmbH
Publication of WO2009130153A1 publication Critical patent/WO2009130153A1/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
    • 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
    • F02M63/0245—Means for varying pressure in common rails by bleeding fuel pressure between the high pressure pump and the common rail
    • 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
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • 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
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0047—Four-way valves or valves with more than four ways

Definitions

  • the invention relates to an apparatus and a method for fuel allocation, in which the fuel is stored under increased pressure in at least one storage device and taken there by at least one injector and at least one combustion chamber of an internal combustion engine is supplied.
  • Such devices are equally used for fuel allocation to self-igniting and spark-ignited internal combustion engines.
  • the process for generating pressure is separated from the control of the injection process. Therefore, the injection process can be completely controlled by an electronic control unit, which controls an electrically operated valve by means of electrical signals.
  • a valve is provided for each cylinder of a multi-cylinder engine. The injection process is influenced by the injection timing, the injection quantity, the number of individual injections and the injection pressure.
  • the storage device In order to control the injection pressure to a predefinable setpoint, the storage device must also have an opening for the removal of excess fuel in addition to a connected to a feed pump inlet, in order to reduce pressure within the storage device can.
  • the removal opening is connected by means of an electrically controllable valve with a fuel return line.
  • the engine control a certain amount of fuel supplied to the storage device.
  • the motor control can control a controlled agreed amount of fuel to be removed from the storage device.
  • the invention has the object to increase the reliability of a device for fuel allocation. Furthermore, the space required for an internal combustion engine and its weight should be reduced.
  • a device for fuel allocation which contains at least one storage device, at least one feed pump, at least one injector and a multi-way valve.
  • fuel can be stored with a predeterminable pressure, wherein the delivery pump is adapted to convey the fuel into the storage device. This can be removed by means of an injector in a predeterminable amount at predetermined times from the storage device and can be supplied to the combustion chamber of an internal combustion engine.
  • the multi-way valve By the multi-way valve, the amount of fuel supplied can be influenced, whereby the pressure in the storage device can be regulated.
  • the object is achieved in a fuel allocation method in which the fuel is stored under increased pressure in at least one storage device and removed there by at least one injector and fed to at least one combustion chamber of an internal combustion engine, the pressure in the engine being increased by a multiway valve Storage device is regulated.
  • the cancellation solution of the problem in an internal combustion engine which is equipped with a device for fuel allocation of the type mentioned.
  • a single multiway valve is adapted to both supply fuel to a storage device to increase the pressure prevailing in the storage device and to withdraw fuel from the storage device to reduce the pressure prevailing in the storage device.
  • the multi-way valve used according to the invention can be controlled particularly advantageously by a single electrical signal from the engine control.
  • the single multi-way valve saves weight and space.
  • An actuator should be an active element, such as an actuator. a servomotor, a piezo actuator, a solenoid or a similar element to be understood.
  • a passive element such as. a spring are provided to bring the multi-way valve in case of failure of the actuator in a predetermined position.
  • the storage device used according to the invention in the device for fuel allocation can be, for example, a pressure vessel or a connecting line which is shared by all the cylinders of an internal combustion engine. The removed from the storage device and the
  • Combustion chambers of the internal combustion engine supplied fuel is replaced via a supply line by means of a feed pump.
  • the pressure prevailing in the storage device can be the limit pressure which the delivery pump is able to provide.
  • the desired value of the pressure in the storage device is predetermined by a control device, the actual value of the pressure is measured and regulated to this desired value.
  • the setpoint can be adapted to the respective operating condition of the internal combustion engine.
  • the storage device by means of the multi-way valve both with a supply line which supplies fuel from a reservoir of the storage device and with a return line, via which fuel from the storage device can be removed.
  • fuel is removed via at least one feed pump from the reservoir and fed to the storage device.
  • the multi-way valve is brought into a second position in which fuel is removed from the storage device via a return line.
  • the extracted fuel can be returned, for example, in the reservoir.
  • the withdrawn fuel can be passed back to the feed pump directly or via a heat exchanger.
  • Both positions of the inventively proposed multi-way valve can be approached sequentially via a single actuator, such as a solenoid, a piezo actuator or a servo motor.
  • a single actuator requires only a single control signal. It can therefore be saved with the inventive device for fuel allocation an actuator and a connecting line to the control unit.
  • the multi-way valve can be brought in case of failure of the actuator in a position which allows emergency operation. This can be done for example by means of an elastic element which acts on the operating element of the multiway valve. As a result, the multi-way valve can, for example, be brought into a position in which an average pressure is established in the storage device, with which in emergency operation a great deal of number of operating states of the internal combustion engine can be realized.
  • the invention proposes that the multiway valve has a blocking position in which neither the supply line nor the return line from or to the storage container are connected to the storage device. If this blocking position is provided as the center position of the multi-way valve, the supply line from the storage container to the storage device and the return line from the storage device to the storage container are never connected at the same time. It is therefore reliably avoided that subsidized fuel is immediately returned through the return line in the reservoir. In this way, the amount of fuel delivered by the feed pump as well as the drive energy required to drive the feed pump is minimized.
  • the multi-way valve is designed as a proportional valve. This allows, as a function of the control signal generated by the control unit, an almost stepless influencing of both the supplied and the discharged fuel quantity and thus a particularly sensitive regulation of the pressure prevailing in the storage device.
  • a further reduction of the installation space as well as a further increase in the reliability in operation results, in particular, when the delivery pump and the multi-way valve are combined in one assembly. As a result, the line length between the components is effectively reduced.
  • the fuel allocation device according to the invention can be universally used for self-igniting and spark-ignited
  • the inventively proposed is
  • Multi-way valve on the inlet side of the feed pump. As a result, the amount of fuel sucked in and compressed by the delivery pump can be optimized and the required drive energy is reduced as desired.
  • FIG. 1 shows a device for fuel allocation of the generic type according to the prior art.
  • Figure 2 shows an embodiment of the device according to the invention, in which a 4/3-way valve is used, in a first position of the valve
  • Figure 3 shows an embodiment of the device according to the invention, in which a 4/3-way valve is used, in a second position of the valve
  • Figure 4 shows an embodiment of the device according to the invention, in which a 4/3-way valve is used, in a third position of the valve
  • Figure 5 shows the valve position of a 4/3-way valve in response to a control signal which can be generated by an engine control unit.
  • FIG. 1 shows a device for allocating fuel to an internal combustion engine of the type mentioned in the introduction according to FIG.
  • the fuel is removed from a storage device 10 and supplied to the combustion chamber of an internal combustion engine.
  • an injector 19a, 19b, 19c and 19d available.
  • Each injector is connected to the storage device 10 by means of a supply line.
  • Each injector has a shut-off valve, not shown in detail, which can be influenced by an electrical control signal of an engine control unit 11. If the controller gives the command to open, the fuel exits at a predetermined time in a predetermined amount at the combustion chamber end of the injector 19. If the injector has leaks, leaking fuel is collected via a return line 22 and fed back to the reservoir 12.
  • the fuel taken out of the storage device 10 via the injectors 19 is replenished via a supply line 21.
  • the supply line 21 is connected to a reservoir 12.
  • the fuel is taken from a low pressure pump 14 via a fuel filter 13.
  • the fuel temperature is measured by means of a temperature sensor 15. This value is available to the control unit 11 for calculating the injection quantity.
  • the output of the low pressure pump 14 is connected to an input of the high pressure pump 17 via a control valve 16. Via the control valve 16, the amount of fuel precalculated by the control unit 11 is allocated to the high-pressure pump 17.
  • the high pressure pump 17 then conveys the
  • both pumps 14, 17 can be combined to form a single delivery pump.
  • the pressure prevailing in the storage device 10 is measured by means of a pressure sensor 18.
  • a pressure sensor 18 This can be arranged in the supply line 21, the storage device 10 or an injector 19.
  • the actual value measured with the pressure sensor 18 is also available to the control unit 11.
  • the control unit 11 presets a desired value for the accumulator pressure 10. For example, it can be provided in part-load operation lower pressure to the storage device 10 to create.
  • the determination of the desired pressure value can take place, for example, by means of numerical maps, with a neural network or by a fuzzy logic.
  • the control device 11, case by case, further input signals 23 are available.
  • the input signals 23 may detect, for example, an accelerator pedal position, a boost pressure, a coolant temperature, an air temperature, an engine speed, or a crankshaft position.
  • the quantity valve 16 is opened and additional fuel is introduced into the storage device 10 by the high-pressure pump 17, in order to increase the pressure prevailing in storage device 10. If the pressure prevailing in the storage device 10 is higher than the desired value, fuel is discharged from the storage device 10. This is preferably done by means of the injectors 19a, 19b, 19c or 19d fuel from the storage device 10 is passed into the combustion chamber of at least one cylinder of the internal combustion engine. However, if no additional fuel is needed in the combustion chamber in the currently present operating state, for example in overrun, a drain valve 20 is available. This can also be opened by an electrical signal from the controller 11 and returns fuel from the storage device 10 via the return line 22 into the reservoir 12.
  • Figure 2 shows an embodiment of the present invention pelg.
  • the same reference numerals designate the same components as in Figure 1. For clarity, not all existing components are shown.
  • the device according to the invention also has a storage device 10. Fuel from the storage device 10 is distributed via injectors 19 to at least one cylinder of an internal combustion engine. As already described above, so many injectors are provided as the Internal combustion engine cylinder has. The injectors 19 are controlled as well as the multi-way valve 24 by a control device, not shown.
  • the fuel passes from a reservoir 12 by means of a low pressure pump 14 via the multiway valve 24 to the input of the high pressure pump 17.
  • further components may be provided, such as sensors for measuring the fuel temperature, fuel filters or sensors for measuring the fuel pressure on the low pressure side.
  • the low-pressure pump 14 can also be dispensed with or combined with the high-pressure pump 17 to form a single delivery pump.
  • the input A is connected to the output D.
  • the fuel flows from the output of the low pressure pump 14 to the input of the high pressure pump 17.
  • the amount thereby conveyed can be influenced by the control unit, for example by the proportion of the opening time to the closing time of the multiway valve 24 is influenced by the control unit. If the multi-way valve 24 is a proportional valve, the flow rate can also be controlled via the opening degree of the multi-way valve.
  • the fuel is conveyed by the high-pressure pump 17 and the supply line 21 into the storage device 10 until the measured fuel pressure corresponds to the desired value.
  • FIG. 3 shows the same mechanical structure as FIGS. 2 and 4.
  • the multiway valve 24 has a blocking means position, which is shown in FIG. In the blocking center position are all Inputs of the multi-way valve 24 separated from all outputs.
  • overlapping of the opening areas of the paths AD and CB is avoided.
  • the pumped by pump 17 amount of fuel and thus the energy required for pump 17 can be minimized.
  • a multi-way valve 24 may be used without such blocking means position.
  • the person skilled in the art will offset in particular the saved effort for the multiway valve 24 against the saved primary energy.
  • Figure 4 shows the same mechanical structure as Figures 2 and 3. However, another switching position of the 4/3-way valve is shown.
  • the switching position shown in Figure 4 is always set by the engine control unit 11 when the measured actual value of the fuel pressure in the storage device 10 is greater than the desired target value and due to the operating condition, a pressure reduction via an injector 19 is not an option.
  • the return line opens into the reservoir 12.
  • the line may end at the input A of the multi-way valve 24.
  • the discharged via the multi-way valve 24 amount of fuel can in turn be controlled by the control of the engine control 11 via the control of the multi-way valve. This can be For example, about the opening time of the connection from input C to output B done. If the multi-way valve 24 is designed as a proportional valve, the discharged fuel quantity can also be controlled via the opening degree.
  • FIG. 5 shows by way of example the degree of opening of the two fluid paths of the multi-way valve according to the invention as a function of the control signal.
  • an analog voltage signal can be used as a control signal, wherein the valve opening curve is successively passed through with an increasing or decreasing voltage value of the control signal.
  • the control signal may also be a pulse width modulated signal.
  • a valve position of the multi-way valve is specified by the duty cycle of a rectangular signal.
  • the control signal may also be a digitally coded signal, by means of which a position on the X axis is specified directly as a digital datum.
  • Various implementations of the control signal are considered to be equally effective and can be arbitrarily selected by the person skilled in the art.
  • one path of the multi-way valve is closed and the other path is opened.
  • the closed path shown in dash-dotted line in FIG. 5 may be the path C-B, through which fuel is returned from the storage device 10 into the storage container 12.
  • the second, shown as a solid line liquid path A-D is fully open.
  • a maximum fuel quantity would thus be conducted from the high-pressure pump 17 into the storage device 10 in the case of a control signal below the limit ThI.
  • the path between the high-pressure pump 17 and the storage device 10 is completely closed.
  • the limits Th2 and Th3 define the blocking means position in which all paths on the multiway valve are closed.
  • the course of the opening degree shown as a dash-dot line is merely an example.
  • the person skilled in the art will here too adapt the multi-way valve and the associated actuator in such a way that a desired course of the curve results.
  • FIG. 5 This realization of an emergency operation shown in FIG. 5 can also be seen by way of example only.
  • the person skilled in the art will adapt the multi-way valve and the associated actuator so that a predefinable valve position results for both paths A-D and C-B, by means of which a multiplicity of possible operating states of the internal combustion engine can be realized.

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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

L'invention concerne un dispositif de répartition du carburant comprenant au moins un dispositif d'accumulation (10), au moins une pompe d'alimentation (17), au moins un injecteur (10) et une vanne de distribution multivoie (24). Le carburant peut être accumulé à une pression donnée dans le dispositif d'accumulation (10). Selon l'invention, la pompe d'alimentation (17) est configurée pour alimenter le dispositif d'accumulation (10) en carburant. Celui-ci peut être prélevé du dispositif d'accumulation (10) au moyen de l'injecteur, dans des volumes pouvant être prédéfinies et à des instants pouvant être prédéfinis et peut être acheminé jusqu'à au moins une chambre de combustion d'un moteur à combustion interne. La pression régnant dans le dispositif d'accumulation (10) peut être régulée par la vanne de distribution multivoie (24) par action sur le volume de carburant acheminé ou prélevé. L'invention concerne également un procédé de répartition du carburant et un moteur à combustion interne équipé du dispositif conforme à l'invention.
PCT/EP2009/054497 2008-04-23 2009-04-16 Dispositif et procédé de répartition du carburant et moteur à combustion interne équipé de celui-ci Ceased WO2009130153A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810020329 DE102008020329A1 (de) 2008-04-23 2008-04-23 Vorrichtung und Verfahren zur Kraftstoffzuteilung sowie damit ausgestattete Brennkraftmaschine
DE102008020329.7 2008-04-23

Publications (1)

Publication Number Publication Date
WO2009130153A1 true WO2009130153A1 (fr) 2009-10-29

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PCT/EP2009/054497 Ceased WO2009130153A1 (fr) 2008-04-23 2009-04-16 Dispositif et procédé de répartition du carburant et moteur à combustion interne équipé de celui-ci

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DE (1) DE102008020329A1 (fr)
WO (1) WO2009130153A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5558068A (en) * 1994-05-31 1996-09-24 Zexel Corporation Solenoid valve unit for fuel injection apparatus
EP1403509A2 (fr) * 2002-09-27 2004-03-31 Robert Bosch Gmbh Dispositif de limitation de pression et système de combustible avec tel dispositif de limitation de pression
DE102004048594A1 (de) * 2004-10-06 2006-04-13 Robert Bosch Gmbh Kraftstoffsystem, für eine Brennkraftmaschine, sowie Verfahren zum Betreiben eines Kraftstoffsystems
DE102005020362A1 (de) * 2005-05-02 2006-11-09 Robert Bosch Gmbh Steuerung eines Volumenstromregelventils und eines Druckventils mit veränderbarer PWM Frequenz

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5558068A (en) * 1994-05-31 1996-09-24 Zexel Corporation Solenoid valve unit for fuel injection apparatus
EP1403509A2 (fr) * 2002-09-27 2004-03-31 Robert Bosch Gmbh Dispositif de limitation de pression et système de combustible avec tel dispositif de limitation de pression
DE102004048594A1 (de) * 2004-10-06 2006-04-13 Robert Bosch Gmbh Kraftstoffsystem, für eine Brennkraftmaschine, sowie Verfahren zum Betreiben eines Kraftstoffsystems
DE102005020362A1 (de) * 2005-05-02 2006-11-09 Robert Bosch Gmbh Steuerung eines Volumenstromregelventils und eines Druckventils mit veränderbarer PWM Frequenz

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Publication number Publication date
DE102008020329A1 (de) 2009-10-29

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