EP0515813B1 - Pompe à injection de combustible pour moteurs à combustion interne - Google Patents
Pompe à injection de combustible pour moteurs à combustion interne Download PDFInfo
- Publication number
- EP0515813B1 EP0515813B1 EP92106301A EP92106301A EP0515813B1 EP 0515813 B1 EP0515813 B1 EP 0515813B1 EP 92106301 A EP92106301 A EP 92106301A EP 92106301 A EP92106301 A EP 92106301A EP 0515813 B1 EP0515813 B1 EP 0515813B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- space
- control
- control valve
- restoring
- 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.)
- Expired - Lifetime
Links
- 238000002347 injection Methods 0.000 title claims description 37
- 239000007924 injection Substances 0.000 title claims description 37
- 239000000446 fuel Substances 0.000 title claims description 35
- 238000002485 combustion reaction Methods 0.000 title claims description 15
- 238000006073 displacement reaction Methods 0.000 claims 1
- 239000007921 spray Substances 0.000 description 19
- 230000001419 dependent effect Effects 0.000 description 6
- 239000002828 fuel tank Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
- F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
- F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
- F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
- F02M41/128—Varying injection timing by angular adjustment of the face-cam or the rollers support
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/16—Adjustment of injection timing
- F02D1/18—Adjustment of injection timing with non-mechanical means for transmitting control impulse; with amplification of control impulse
- F02D1/183—Adjustment of injection timing with non-mechanical means for transmitting control impulse; with amplification of control impulse hydraulic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/16—Adjustment of injection timing
- F02D1/18—Adjustment of injection timing with non-mechanical means for transmitting control impulse; with amplification of control impulse
- F02D1/183—Adjustment of injection timing with non-mechanical means for transmitting control impulse; with amplification of control impulse hydraulic
- F02D2001/186—Adjustment of injection timing with non-mechanical means for transmitting control impulse; with amplification of control impulse hydraulic using a pressure-actuated piston for adjustment of a stationary cam or roller support
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0606—Fuel temperature
Definitions
- the invention is based on a fuel injection pump according to the preamble of the main claim.
- a fuel injection pump according to the preamble of the main claim.
- Such is known from German patent application DE-A-39 12 624.
- a hydraulic blocking of the pressure control valve of the feed pump prevents it from being deactivated and thus the entire fuel delivered is used to build up the control pressure. In this way, even with a cold internal combustion engine, a high suction chamber pressure and the associated spray adjustment in the direction of early can be achieved as quickly as possible.
- the known cold start system consists of a fuel injection pump with an injection adjustment device, a feed pump via which a pressure control valve located in the feed line to the fuel injection pump controls the inflow to the suction space and two valves arranged in parallel in the relief line of the pressure control valve return space, one of which depends on the operating temperature of the engine and the other is opened depending on the control pressure in the suction chamber.
- These two valves in the relief line of the pressure control reset chamber enable the fuel flow to be shut off in the warm-up phase or when the engine is started by hydraulically blocking the bypass line via the pressure control valve, so that all of the fuel flows to the fuel injection pump and can build up the control pressure quickly in a known manner , which results in an advance adjustment of the spray adjustment device.
- the fuel injection pump according to the invention with the features of claim 1 has the advantage that the position of the actuating piston of the spray adjustment device is used as a speed-proportional signal to control the blocking of the relief line of the pressure control valve. This eliminates a separate pressure-controlled valve, which represents a noticeable cost advantage in the manufacture of the fuel injection pump. In addition, the tolerances of the spray adjustment during the transition from cold star acceleration to normal function can be kept small. Further advantages of advantageous embodiments of the invention can be found in the following description, the drawing and the claims.
- FIG. 1 shows a schematic illustration of the fuel injection pump according to the invention
- FIG. 2 shows the pressure curve in the pressure chamber of the pressure control valve or of the control pressure effective at the spray adjustment device in various functional positions of the actuating piston.
- FIG. 1 shows a part of a distributor fuel injection pump 1 with a spray adjustment device 2, which has an adjustment piston 4 which can be displaced in a cylinder 3 and which is acted upon on one end face by a return spring 5, which is supported in a stationary manner on an end face of the cylinder 3 and is supported is located in a reset space 9, which is formed by an end face and the wall of the cylinder 3, and an end face of the injection adjusting piston 4, on the other end side of which a spray adjuster working space 6 in the cylinder 3 is delimited.
- the injection adjuster working space 6 is connected via a throttle bore 7 in the injection adjustment piston 4 to a suction space 8 inside the fuel injection pump.
- the cylinder 3 has an inlet bore 10 on its cylindrical wall, which is opened or closed via a control edge 11 formed by a bore in the injection adjustment piston 4 that is permanently connected to the resetting space during the axial movement of the injection adjustment piston 4 in the cylinder 3.
- a relief bore 12 opens into the resetting space 9 of the spray adjustment device 2 via the end face of the cylinder 3, so that this is constantly relieved of pressure via a return line 13 to the fuel tank 14.
- the suction chamber 8 is supplied with fuel by a feed pump 15, which is driven synchronously with the distributor fuel injection pump 1, via a pressure line 16, the feed pump 15 taking the fuel from the fuel tank 14 via a suction line 17.
- a bypass line 18, in which a pressure control valve 19 is located, is arranged parallel to the feed pump 15.
- This has an adjustable wall in the form of a control piston 20, which slides tightly in a cylinder 21 and delimits a pressure chamber 22 on one end side, into which the bypass line 18 opens from the pressure line 16.
- the control piston 20 delimits a pressure control valve return space 25, in which a return spring 26 is arranged, which is supported on the star piston 20 on the one hand and on the upper end side of the cylinder 21 on the other.
- a drain line 23 of the pressure chamber 22 is introduced into the cylindrical wall of the cylinder 21, the cross section of which is opened or closed by a control edge 24 formed by the bottom of the control piston 20, depending on the axial position of the control piston 20.
- This drain line 23 opens via the bypass line 18 into the suction line 17 to the feed pump 15.
- the pressure control valve reset chamber 25 is connected to the pressure chamber 22 continuously via a throttle 27. Furthermore, the reset space 25 is connected to the fuel tank 14 via a relief line 29. In this relief line 29, a pressure holding valve 30 is arranged, which can block the outflow from the pressure control valve reset chamber 25.
- This pressure holding valve 30 is designed as a check valve and is closed by a ball valve 31 with a spring element 32, the closing member being able to be pushed open by a temperature-dependent actuating element 33.
- This actuator 33 is, for example, a thermostat or an expansion element which is exposed to the cooling water of the internal combustion engine and thus detects the operating temperature of the internal combustion engine.
- a relief line 39 leads to the inlet bore 10 in the cylinder 3 of the injection adjustment device 2, an opening cross section being released by the injection adjustment piston 4 from a certain axial position and the fuel from the recovery space 25 of the pressure control valve 19 via the recovery space 9 of the injection adjustment device 2 can flow to the fuel tank 14.
- the fuel injection pump When the fuel injection pump is operating, its suction space is filled with fuel.
- the return spring 26 adjusts the control piston 20 to the bottom of the cylinder 21 of the pressure control valve 19 and thus closes the drain line 23 held and closes the circumference of the inlet bore 10.
- the feed pump 15 is set in motion and generates a pressure in the suction chamber 8 or in the pressure chamber 22 of the pressure control valve 19. Since the relief of the pressure control valve reset chamber 25 when the internal combustion engine is still cold in the pressure control valve 19 via the Pressure holding valve 30 and is blocked by the spray adjustment device 2, the control piston 20 is held in its initial position, and the bypass line 18 remains closed.
- the temperature-dependent actuator 33 keeps the pressure-maintaining valve 30 open even when the engine is switched off and the fuel pressure drop associated therewith and when the coolant is hot, thus ensuring the constant relief of the pressure control valve return space 25 in the pressure control valve 19. If the engine is now started, the pressure is controlled and, with it, the spray adjustment is also speed-dependent via the pressure control valve 19.
- the device according to the invention thus enables extreme spray adjustment, up to a degree limited by the adjustment piston of the spray adjuster, only when the internal combustion engine is cold. In this way, the advantage of a strong advance adjustment when the internal combustion engine is cold does not have a disadvantageous effect on starting when the internal combustion engine is at operating temperature.
- the advantage to be emphasized of the fuel injection pump according to the invention consists in the saving of a pressure valve in the relief line 29 of the pressure control valve 19, in that the speed-dependent control is implemented during the warm-up phase of the engine via the adjusting piston 4 of the spray adjustment device 2 of the distributor fuel injection pump 1.
- FIG. 2 shows the course of the spray adjustment in a diagram over the speed.
- the dashed lines show the fuel injection pump according to the invention in relation to the full line of a distributor fuel injection pump without a cold start accelerator. After starting the engine, the rapid build-up of pressure in the suction chamber and the associated steep increase in the start of spraying can be seen (point A - point B).
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4117813A DE4117813A1 (de) | 1991-05-31 | 1991-05-31 | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE4117813 | 1991-05-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0515813A1 EP0515813A1 (fr) | 1992-12-02 |
EP0515813B1 true EP0515813B1 (fr) | 1995-03-08 |
Family
ID=6432847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92106301A Expired - Lifetime EP0515813B1 (fr) | 1991-05-31 | 1992-04-11 | Pompe à injection de combustible pour moteurs à combustion interne |
Country Status (4)
Country | Link |
---|---|
US (1) | US5188083A (fr) |
EP (1) | EP0515813B1 (fr) |
JP (1) | JPH05156970A (fr) |
DE (2) | DE4117813A1 (fr) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5263457A (en) * | 1989-12-06 | 1993-11-23 | Robert Bosch Gmbh | Fuel injection pump for internal combustion engines |
DE3943246A1 (de) * | 1989-12-29 | 1991-07-04 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe |
DE4311672A1 (de) * | 1993-04-08 | 1994-10-13 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe |
GB9725415D0 (en) * | 1997-12-02 | 1998-01-28 | Lucas Ind Plc | Advance arrangement |
GB9826348D0 (en) * | 1998-12-02 | 1999-01-27 | Lucas Ind Plc | Advance arrangement |
DE19832842C1 (de) * | 1998-07-21 | 2000-02-17 | Bosch Gmbh Robert | Kraftstoff-Fördersystem zur Kraftstoffversorgung einer Brennkraftmaschine |
DE19942548A1 (de) * | 1999-09-07 | 2001-03-08 | Mannesmann Vdo Ag | Zum Fördern von Kraftstoff aus einem Kraftstoffbehälter zu einer Brennkraftmaschine eines Kraftfahrzeuges vorgesehene Fördereinrichtung |
GB0122968D0 (en) * | 2001-09-24 | 2001-11-14 | Delphi Tech Inc | Advance arrangement |
WO2011126835A2 (fr) | 2010-03-30 | 2011-10-13 | Stephen Lee Cunningham | Moteur à pistons oscillants |
US9869272B1 (en) | 2011-04-20 | 2018-01-16 | Martin A. Stuart | Performance of a transcritical or supercritical CO2 Rankin cycle engine |
CA2870310C (fr) | 2012-04-18 | 2021-03-30 | Martin A. Stuart | Moteur a piston oscillant polygonal |
WO2024107534A1 (fr) * | 2022-11-14 | 2024-05-23 | Cummins Inc. | Soupape de régulation de pression pour système de carburant de moteur |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3147746A (en) * | 1961-04-01 | 1964-09-08 | Bosch Gmbh Robert | Injection pump adjusting structure |
US3101078A (en) * | 1961-04-25 | 1963-08-20 | Cav Ltd | Liquid fuel pumps |
DE2918867C2 (de) * | 1979-05-10 | 1987-03-19 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzpumpe für Brennkraftmaschinen mit einer Steuereinrichtung für die Änderung des Förderbeginns |
DE3112487A1 (de) * | 1980-03-31 | 1982-03-18 | Nissan Motor Co., Ltd., Yokohama, Kanagawa | Kraftstoff-einspritzverteilerpumpe |
DE3121635A1 (de) * | 1981-05-30 | 1982-12-23 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE3138606A1 (de) * | 1981-09-29 | 1983-04-14 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE3148214A1 (de) * | 1981-12-05 | 1983-06-09 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE3410146A1 (de) * | 1984-03-20 | 1985-10-03 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE3418437A1 (de) * | 1984-05-18 | 1985-11-21 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
JPS6117150U (ja) * | 1984-05-28 | 1986-01-31 | 株式会社ボッシュオートモーティブ システム | 分配型燃料噴射ポンプ |
DE3517974A1 (de) * | 1985-05-18 | 1986-11-20 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE3619325A1 (de) * | 1986-06-09 | 1987-12-10 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE3912624A1 (de) * | 1989-04-18 | 1990-10-25 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
-
1991
- 1991-05-31 DE DE4117813A patent/DE4117813A1/de not_active Withdrawn
-
1992
- 1992-04-11 EP EP92106301A patent/EP0515813B1/fr not_active Expired - Lifetime
- 1992-04-11 DE DE59201577T patent/DE59201577D1/de not_active Expired - Fee Related
- 1992-05-29 US US07/890,427 patent/US5188083A/en not_active Expired - Fee Related
- 1992-06-01 JP JP4140213A patent/JPH05156970A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US5188083A (en) | 1993-02-23 |
DE59201577D1 (de) | 1995-04-13 |
DE4117813A1 (de) | 1992-12-03 |
EP0515813A1 (fr) | 1992-12-02 |
JPH05156970A (ja) | 1993-06-22 |
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Inventor name: GOLL, WOLFGANG Inventor name: TAUDT, CHRISTIAN, DIPL.-ING. Inventor name: REISSER, BERNI, DIPL.-ING. Inventor name: KHOSRAWI, MOHAMMAD-ALI, DR.-ING. Inventor name: SIMON, HELMUT Inventor name: WUETHERICH, PAUL Inventor name: PFLUG, HANNES, DIPL.-MIN. Inventor name: KONRATH, KARL |
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