EP0745184A1 - Verfahren zur reduzierung des kraftstoffdruckes in einer kraftstoffeinspritzeinrichtung - Google Patents
Verfahren zur reduzierung des kraftstoffdruckes in einer kraftstoffeinspritzeinrichtungInfo
- Publication number
- EP0745184A1 EP0745184A1 EP95919966A EP95919966A EP0745184A1 EP 0745184 A1 EP0745184 A1 EP 0745184A1 EP 95919966 A EP95919966 A EP 95919966A EP 95919966 A EP95919966 A EP 95919966A EP 0745184 A1 EP0745184 A1 EP 0745184A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- valve
- chamber
- injection
- control
- 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.)
- Granted
Links
Classifications
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- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
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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
- F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
- F02D41/3872—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves characterised by leakage flow in injectors
-
- 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
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
-
- 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
- F02D41/3827—Common rail control systems for diesel engines
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
-
- 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
- F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
- F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated 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
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
-
- 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
Definitions
- the invention is based on a fuel injection device for internal combustion engines according to the preamble of claim 1.
- a high-pressure feed pump fills a high-pressure accumulator with fuel from a pre ⁇ council tank.
- Pressure lines lead from the high-pressure accumulator (common rail) to the individual injection valves projecting into the combustion chamber of the internal combustion engine to be supplied, which in the known device via a first channel directly into a first valve valve of the injection valve in the opening direction Open pressure chamber and can be connected via a second channel with a second pressure chamber, which acts on the valve member in the closing direction and forms a control chamber.
- a 3/2-way control valve is used in this second channel, which connects the control chamber on the valve member with the pressure line coming from the high-pressure accumulator or a relief line into the storage tank.
- the 3/2-way control valve is actuated by a solenoid valve which is actuated by an electronic control device which processes various operating parameters of the internal combustion engine.
- the injection valve is kept closed by the connection of the control chamber to the high-pressure accumulator, for which purpose the pressure application surface of the valve member projecting into the control chamber is made larger than the pressure application surface projecting into the first pressure chamber in the opening direction. If an injection is to take place at the injection valve, the control valve connects the control chamber to the relief line, so that the high pressure in the control chamber is relieved via this into the storage tank, a throttle in the relief line also being provided to control the course of the injection.
- the pressure reduction in the control chamber results in an opening stroke movement of the valve member as a result of the pressure in the first pressure chamber, which is permanently connected to the high-pressure accumulator, so that an injection cross section is opened at the injection valve, via which the fuel is injected under high pressure into the combustion chamber of the internal combustion engine becomes.
- the injection is ended by switching the control valve again and connecting the control chamber to the high-pressure accumulator, in the course of which the high-pressure fuel builds up again in the control chamber, so that the valve member is pushed back into its closed position.
- the known fuel injection device has the disadvantage that the high fuel pressure remains in the system for a long time even after the internal combustion engine has been switched off, which makes maintenance and repair work very dangerous, so that the known system does not meet the usual safety requirements .
- the method according to the invention for reducing the fuel pressure in a fuel injection device with the characterizing features of patent claim 1 has the advantage over the fact that it is possible to keep the high pressure in the high-pressure accumulator and the system connected to it to a low level after the internal combustion engine has been switched off to lower non-hazardous pressure levels. This is done by means of the components already present on the system, so that, in contrast to other solutions, no additional pressure valve and no further line are required be, which in particular reduces the manufacturing effort and thus the cost of the injection device.
- the pressure relief is advantageously carried out via the control valve and the pressure chambers of the injection valve in the storage tank, for which purpose only a further control option of the solenoid valve actuating the control valve on the electronic control unit is to be provided after the internal combustion engine has been switched off.
- the control valve is then actuated so briefly that the pressure required for lifting the valve member cannot build up on the injection valve.
- this is done either by briefly relieving the pressure on the control chamber on the valve member or by briefly pressurizing the pressure chamber acting in the opening direction, which is followed by refilling the control chamber or relieving the pressure from the pressure chamber that the high pressure can be continuously reduced via the relief line in the storage tank.
- the electronic control unit controls the solenoid valve with a high frequency, which is preferably achieved by a two-part activation (pre-injection, main injection) and by assuming a high engine speed, with all injection valves of the internal combustion engine are involved in this relief process.
- the individual control valves are actuated one after the other, preferably in the order of the firing order of the individual cylinders.
- the pressure in the high-pressure system is monitored during the pressure relief process by means of at least one pressure sensor, which is coupled to the electronic control unit. that the actuation duration of the actuating the control valves Adapts solenoid valves to the existing system pressure. This adjustment advantageously makes it possible to shorten the emptying time, since the activation time of the solenoid valves can already be extended at lower pressures in the system.
- FIG. 1 shows a first exemplary embodiment in a schematic illustration, in which the injection valve has two pressure chambers acting in opposite directions on the valve member of the injection valve, of which a first pressure chamber is permanently connected to the high-pressure system and a second one, the stroke movement the pressure chamber controlling the valve member can be connected to the high-pressure system or a storage tank by means of a 3/2-way control valve
- FIG. 2 shows a second exemplary embodiment analogous to FIG. 1, in which the second pressure chamber can be connected to the storage tank by means of a 2/2-way control valve
- FIG. 3 shows a third exemplary embodiment in a schematic representation, in which only one pressure chamber, which acts against the spring force in the direction of opening, is provided, which can be connected to the high-pressure system or the storage tank by means of a 3/2-way control valve, and FIG. 4 a diagram in which the duration of the ersi- gnals of the solenoid valve, the duration of the solenoid valve needle stroke and the pressure in the system are plotted over time.
- a pressure-controllable high-pressure feed pump 1 delivers fuel from a storage tank 5 at high pressure via a delivery line 3 into a high-pressure storage space 7 (common rail), of which several pressure lines 9 correspond to the number of injection points lead to the individual injection valves 11 projecting into the combustion chamber of the internal combustion engine to be supplied.
- the injection valve 11 has a piston-shaped valve member 15 which is axially displaceable in a guide bore 13, with a conical valve sealing surface 17 at one end, with which it cooperates with a valve seat surface on the housing 21 of the injection valve 11, which is not shown in any known manner Connect the injection openings downstream to the valve seat 19.
- the valve member 15 projects into two pressure spaces formed within the guide bore 13, of which a first pressure space 23 acting on the valve member in the opening direction is formed by a reduction in the cross section of the valve member 15.
- This first pressure chamber 23 is continuously connected to the high-pressure accumulator chamber 7 via a pressure channel 25 which opens into the pressure line 9 and continues in a known manner via an annular gap between the valve member 15 and the guide bore 13 to the valve seat 19.
- valve member 15 projects through a spring chamber 26 sealed against the high fuel pressure, in which a valve spring 28 is arranged, which acts on the valve member 15 in the closing direction.
- valve member At its end facing away from the valve seat 19, the valve member has a cross-sectional widening, the end face 27 of which faces away from the valve seat defines a second pressure chamber which forms a control chamber 29 and acts on the valve member 15 in the closing direction and which connects via a connecting channel 29 to a 2-way control valve 31 is connected, which connects the control chamber 29 with a relief line 35 containing a throttle 33 into the storage tank 5 serving as relief space or with the pressure line 9 from the high-pressure storage space 7, wherein a relief line without throttle is also possible analogously.
- the 3/2-way control valve is actuated by an electromagnet 37, which is controlled by an electronic control device 39, which in turn processes various operating parameters (speed, accelerator pedal position, etc.) of the internal combustion engine to be supplied, which parameters are supplied to it.
- an electronic control device 39 which in turn processes various operating parameters (speed, accelerator pedal position, etc.) of the internal combustion engine to be supplied, which parameters are supplied to it.
- a pressure sensor 43 is also inserted in the high-pressure storage space 7.
- the fuel injection device operates in a known manner during operation of the internal combustion engine, the high-pressure feed pump 1 initially filling the high-pressure storage space 7 with fuel under high pressure. This high fuel pressure continues through the pressure lines 9 to the individual injection valves 11 and acts there on the first pressure chamber 23.
- the valve member 15 is affected by the force of the valve spring 28 and the pressure in the control chamber 29 by the 3/2-way control valve 31 connected to the pressure line 9, held in the closed state of the injection valve 11 in contact with the valve seat 19, the end face 27 of the valve member 15 projecting into the control chamber 29 being larger than the annular shoulder delimiting the first pressure chamber 23.
- control chamber 29 is controlled by the 3/2-way control valve 31 with the Relief line 35 connected so that the pressure in the control chamber 29 relaxes in the storage tank 5.
- the pressure in the pressure chamber 23 acting on the valve member 15 in the opening direction exceeds the forces acting on the valve member 15 in the closing direction, so that the valve member 15 lifts off the valve seat 19 and fuel is injected via the injection openings.
- the relief process of the control chamber 29 and thus the opening stroke movement of the valve member 15 can be influenced by the dimensioning of the throttle 33.
- the end of the injection process is initiated by switching the 3/2-way control valve 31 again, which connects the control chamber 29 to the pressure line 9 again, so that the control element 29 builds up again, the valve member 15 moving back to its valve seat 19 .
- the explanation of the pressure reduction according to the invention in the high-pressure storage space 7 and in the pressure lines 9 after the internal combustion engine has been switched off is based on the diagram shown in FIG. 4, in which the duration of the control signal of the electromagnet 37 (MV), the needle stroke (NH) 3/2-way control valve 31 actuated by electromagnet 37 and the pressure curve ( ⁇ P) in high-pressure storage space 7 are plotted over time (t).
- the control unit 39 controls the electromagnet 37 after the internal combustion engine to be supplied has been switched off at a high frequency, which can be achieved, for example, by a divided control (analogous to pre-injection and main injection). Due to the short current supply to the electromagnet 37, the valve member of the 3/2-way control valve 31 actuated by it only executes a ballistic needle stroke (NH), so that the 3/2-way control valve 31 does not completely connect the control chamber 29 and the relief line 35 ⁇ dig opens. This ensures that the pressure in the control chamber 29 does not drop so far that the differential pressure to the pressure chamber 23 is sufficient, the valve member 15 to let the injector 11 lift off its seat 19. After this brief opening of the connection between the control chamber 29 and the relief line 35, through which part of the high fuel pressure from the control chamber 29 relaxes in the storage tank 5, the control chamber 29 is again connected to the pressure line 9 and filled with the high system pressure.
- NH ballistic needle stroke
- This brief opening of the control chamber 29 to the relief line 35 takes place until the high fuel pressure in the high-pressure storage space 7 has dropped to a certain value ( ⁇ P).
- the individual injection valves 11 are activated one after the other, which can be done, for example, in the order of the firing order of the individual cylinders of the internal combustion engine.
- the process of reducing the pressure is monitored by the pressure sensor 43 from the control unit 39, which adjusts the actuation duration of the 3/2-way control valves 31 as a function of the pressure present in the high-pressure storage space 7.
- the electromagnets 37 are actuated shorter at high pressure than at low pressure, so that an optimal emptying time can be achieved while reliably avoiding fuel injection.
- the second exemplary embodiment of a fuel injection device for carrying out the method according to the invention shown in FIG. 2 differs from the first exemplary embodiment shown in FIG. 1 only in the manner in which the control chamber 29 on the injection valve 11 is connected to the pressure line 9 and the relief line 35 and the structure of the control valve that there is designed as a 2/2-way control valve 45 and opens or closes the connection of the control chamber 29 to the relief line 35.
- the control chamber 29 is connected to the pressure line 9 via a connecting line 49 containing a first throttle point 47.
- a second throttle point 51 is located in the connecting channel 30 to the 2/2-way control valve 45 used, the design of the outflow of fuel from the control chamber 29 into the storage tank 5 and thus the opening stroke movement of the valve member 15 can be adjusted.
- the second exemplary embodiment works analogously to the first, wherein during operation of the internal combustion engine, due to the opening of the connection between the control chamber 29 and the relief line 35 by the 2/2-way control valve 45 controlled by the electromagnet 37, the valve member 15 is lifted off the valve seat 19 and thus the injection process takes place .
- the pressure relief of the high-pressure storage space 7 after the internal combustion engine has been switched off is carried out, as described in the first exemplary embodiment, by briefly opening the connection between the control space 29 and the relief line 35, so that the pressure is relieved from the high-pressure storage space 7 by constantly refilling the control space 29 can be lowered.
- the pressure relief of the control chamber 29 takes place only so briefly and to such a small extent that no injection takes place at the injection valves 11.
- the reduction of the high fuel pressure in the high-pressure storage chamber 7 after the internal combustion engine has been switched off takes place in the third exemplary embodiment by a short-term connection of the pressure chamber 323 to the pressure line 9, which, however again so short that, on the one hand, the pressure required for an injection cannot build up in the pressure chamber 323, but, on the other hand, the pressure is above the opening pressure of the pressure valve 53 in the relief line 35, so that the high pressure in the high-pressure storage chamber 7, as already described, by repeated activation of the 3/2-way control valve 31 can be reduced to the opening pressure of the pressure valve 53.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4445586 | 1994-12-20 | ||
DE4445586A DE4445586A1 (de) | 1994-12-20 | 1994-12-20 | Verfahren zur Reduzierung des Kraftstoffdruckes in einer Kraftstoffeinspritzeinrichtung |
PCT/DE1995/000713 WO1996019659A1 (de) | 1994-12-20 | 1995-06-01 | Verfahren zur reduzierung des kraftstoffdruckes in einer kraftstoffeinspritzeinrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0745184A1 true EP0745184A1 (de) | 1996-12-04 |
EP0745184B1 EP0745184B1 (de) | 1998-10-28 |
Family
ID=6536449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95919966A Expired - Lifetime EP0745184B1 (de) | 1994-12-20 | 1995-06-01 | Verfahren zur reduzierung des kraftstoffdruckes in einer kraftstoffeinspritzeinrichtung |
Country Status (6)
Country | Link |
---|---|
US (1) | US5711274A (de) |
EP (1) | EP0745184B1 (de) |
JP (1) | JPH09509716A (de) |
KR (1) | KR100378722B1 (de) |
DE (2) | DE4445586A1 (de) |
WO (1) | WO1996019659A1 (de) |
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US6189508B1 (en) * | 1997-03-12 | 2001-02-20 | FORSCHUNGS- UND TRANSFERZENTRUM E.V. AN DER WESTSäCHSISCHEN HOCHSCHULE ZWICKAU | Method for fuel injection in multicylinder engines and device for the implementation of said method |
JP3546285B2 (ja) | 1997-08-04 | 2004-07-21 | トヨタ自動車株式会社 | 蓄圧式エンジンの燃料噴射制御装置 |
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DE19744723A1 (de) * | 1997-10-10 | 1999-04-15 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung |
US6167869B1 (en) * | 1997-11-03 | 2001-01-02 | Caterpillar Inc. | Fuel injector utilizing a multiple current level solenoid |
GB2332241B (en) * | 1997-12-11 | 2001-12-19 | Denso Corp | Accumulator fuel injection system for diesel engine of automotive vehicles |
US5875764A (en) * | 1998-05-13 | 1999-03-02 | Siemens Aktiengesellschaft | Apparatus and method for valve control |
US6092509A (en) * | 1998-11-19 | 2000-07-25 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Accumulator type fuel injection system |
DE19954023B4 (de) * | 1998-11-30 | 2009-02-26 | Denso Corp., Kariya-shi | Hochdruckkraftstoffeinspritzvorrichtung |
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DE102005012997B4 (de) * | 2005-03-21 | 2010-09-09 | Continental Automotive Gmbh | Druckabbauverfahren für eine Einspritzanlage und entsprechende Einspritzanlagen |
DE102005060552B4 (de) * | 2005-12-17 | 2009-06-10 | Man Diesel Se | Einspritzvorrichtung für Brennstoffmotoren |
PL1803917T3 (pl) * | 2005-12-28 | 2009-01-30 | Magneti Marelli Powertrain Spa | Sposób sterowania systemem typu common-rail bezpośredniego wtrysku paliwa do silnika spalania wewnętrznego |
DE602007004184D1 (de) * | 2007-01-23 | 2010-02-25 | Scania Cv Ab | Anordnung und Verfahren zum Abschalten eines Verbrennungsmotors |
DE602007006173D1 (de) * | 2007-07-05 | 2010-06-10 | Magneti Marelli Spa | Verfahren zur Steuerung des Überdrucks in einem Brennstoffversorgungssystem des Common-Rail-Typs |
US8291889B2 (en) | 2009-05-07 | 2012-10-23 | Caterpillar Inc. | Pressure control in low static leak fuel system |
US8196567B2 (en) * | 2010-05-28 | 2012-06-12 | Ford Global Technologies, Llc | Approach for controlling fuel flow with alternative fuels |
CA2809539C (en) * | 2013-03-15 | 2014-05-13 | Westport Power Inc. | Preventing fuel regulation failure |
FR3012177A1 (fr) * | 2013-10-23 | 2015-04-24 | Peugeot Citroen Automobiles Sa | Procede de decharge d'un rail d'injection de carburant haute pression de moteur a combustion interne en cas d'intervention apres-vente |
US10267282B2 (en) * | 2014-09-12 | 2019-04-23 | Ge Global Sourcing Llc | Pressure relief valve systems |
DE102016207297B3 (de) | 2016-04-28 | 2017-10-19 | Mtu Friedrichshafen Gmbh | Verfahren zum Betrieb einer Brennkraftmaschine, Einrichtung zum Steuern und/oder Regeln einer Brennkraftmaschine, Einspritzsystem und Brennkraftmaschine |
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US4782808A (en) * | 1986-08-13 | 1988-11-08 | Ashland Oil, Inc. | Process and apparatus for reducing port fuel injector deposits |
US5074272A (en) * | 1986-08-13 | 1991-12-24 | Ashland Oil, Inc. | Process and apparatus for reducing port fuel injector deposits |
JPH0354358A (ja) * | 1989-07-21 | 1991-03-08 | Yamaha Motor Co Ltd | エンジンの高圧燃料噴射装置 |
JP2773826B2 (ja) * | 1989-12-27 | 1998-07-09 | ヤマハ発動機株式会社 | 2サイクルエンジンの空気燃料噴射装置 |
US5159911A (en) * | 1991-06-21 | 1992-11-03 | Cummins Engine Company, Inc. | Hot start open nozzle fuel injection systems |
DE4332119B4 (de) * | 1993-09-22 | 2006-04-20 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen |
US5408970A (en) * | 1994-05-02 | 1995-04-25 | General Motors Corporation | Electronically controlled continuous flow fuel system |
-
1994
- 1994-12-20 DE DE4445586A patent/DE4445586A1/de not_active Withdrawn
-
1995
- 1995-06-01 DE DE59504070T patent/DE59504070D1/de not_active Expired - Lifetime
- 1995-06-01 EP EP95919966A patent/EP0745184B1/de not_active Expired - Lifetime
- 1995-06-01 US US08/696,870 patent/US5711274A/en not_active Expired - Lifetime
- 1995-06-01 KR KR1019960704519A patent/KR100378722B1/ko not_active IP Right Cessation
- 1995-06-01 JP JP8519396A patent/JPH09509716A/ja active Pending
- 1995-06-01 WO PCT/DE1995/000713 patent/WO1996019659A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9619659A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0745184B1 (de) | 1998-10-28 |
US5711274A (en) | 1998-01-27 |
DE4445586A1 (de) | 1996-06-27 |
WO1996019659A1 (de) | 1996-06-27 |
JPH09509716A (ja) | 1997-09-30 |
DE59504070D1 (de) | 1998-12-03 |
KR100378722B1 (ko) | 2003-06-19 |
KR970701309A (ko) | 1997-03-17 |
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