EP0309501A1 - Kraftstoffeinspritzpumpe für Brennkraftmaschinen. - Google Patents
Kraftstoffeinspritzpumpe für Brennkraftmaschinen.Info
- Publication number
- EP0309501A1 EP0309501A1 EP19880902423 EP88902423A EP0309501A1 EP 0309501 A1 EP0309501 A1 EP 0309501A1 EP 19880902423 EP19880902423 EP 19880902423 EP 88902423 A EP88902423 A EP 88902423A EP 0309501 A1 EP0309501 A1 EP 0309501A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- pump
- fuel
- fuel injection
- injection
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 77
- 238000002347 injection Methods 0.000 title claims abstract description 72
- 239000007924 injection Substances 0.000 title claims abstract description 72
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000001133 acceleration Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- 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
-
- 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
- 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
- F02M41/125—Variably-timed valves controlling fuel passages
-
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Definitions
- the invention is based on a method and a device for controlling the fuel injection quantity by means of a fuel injection pump for internal combustion engines according to the type of the independent claims.
- a fuel injection pump for internal combustion engines according to the type of the independent claims.
- most diesel engines have uncomfortably hard combustion noises when idling or in the low partial load range, which can be reduced by extending the injection duration in this speed range.
- the amount of fuel sprayed off is the balance between the amount of fuel delivered by the pump workspace and the amount of fuel flowing out via the bypass.
- a fuel injection pump of this type known from DE-OS 35 07 853
- an electric valve is used which flows into loose state keeps the bypass fully open and which closes the bypass with increasing electrical excitation.
- the valve for defining the injection phase In a first operating state, the valve for defining the injection phase is completely closed and in a second operating state, in idle mode, is only partially closed over the entire duration of the injection with the result that the fuel injection rate is reduced.
- the duration of the partially closed state compared to an injection with a high injection rate must be extended accordingly in order to bring the same amount of fuel to the injection.
- the start and end of delivery are determined solely by the closing or opening movement of the valve, which requires precise coordination between the delivery movement of the pump piston and the electrical actuation of the valve. Even slight irregularities in the mutual coordination of these movements can lead to major changes in the fuel quantities reaching the injection valves and thus to irregularities in the fuel metering of the internal combustion engine.
- the course of the injection can be designed in such a way that the one reaching the injection valves Fuel quantity is injected towards the end of delivery with a high injection rate, but at the beginning of injection with a reduced injection rate that takes into account the still low combustion rate. This increases the combustion efficiency and reduces the combustion noise, these advantages also being achieved above the idling speed and idling quantity.
- FIG. 1 shows a fuel injection pump in a simplified representation with a ring slide for controlling the fuel quantity
- FIG. 2 shows a diagram that shows the course of the pump piston stroke over time
- FIG. 3 shows a diagram that shows the course of the stroke of the valve closing member over time
- FIG 4 shows a further diagram which shows the course of the element pressure in the pump working chamber over time.
- FIG. 5 shows a fuel injection pump with an additional magnetic valve instead of the ring slide for controlling the total duration of the injection per pump piston stroke.
- a socket 2 is arranged in a housing 1, in which a pump piston 3 executes a reciprocating and simultaneously rotating movement.
- the pump piston 3 is driven in a manner known per se by a cam drive via a shaft which rotates synchronously with the speed of the internal combustion engine supplied with fuel by the injection pump.
- the pump piston 3 is mounted in a pump cylinder 4 within the bushing 2.
- the pump piston 3 encloses the pump cylinder 4 with a pump working space 5 which Via a filling groove 6 in the lateral surface of the pump piston 3 during the suction stroke thereof, it is connected to a fuel supply line 8 which opens laterally on the pump piston 3 into the pump cylinder 4. This branches off from a suction chamber 9, which is filled with fuel-controlled pressure levels by means not shown.
- a relief channel 10 runs axially in the pump piston 3, from which a radial bore 11 leads and opens into a distributor groove 12. This is connected in the course of the pump piston working movement during each pressure stroke of the pump piston 3 to one of a plurality of fuel supply lines 14 which, in an axial plane corresponding to the number and distribution of the cylinders of the associated internal combustion engine to be supplied by the fuel injection pump, around the pump piston 3 from the pump cylinder 4 branch.
- Each of the fuel supply lines 14 leads to a pressure-actuated injection nozzle which is known per se.
- the relief channel 10 merges in a part of the pump piston 3 projecting into the suction chamber 9 into a transverse bore 15, the mouth of which is controlled on the outer surface of the pump piston 3 by a ring slide 16 which can be moved tightly on the pump piston 3.
- a controller of which only one eccentric 18 is shown in the drawing, the ring slide 16 is adjusted in its axial position in a known manner in order to change that lifting point of the pump piston 3 at which the delivery of fuel to the injection nozzles by opening the Relief channel 10 is ended.
- a mechanical or hydraulic as well as an electrical signal box can be used to adjust the ring slide 16.
- a removal duct 20 branches off from the pump work chamber 5, which is followed by a constriction designed as a throttle 22. After the throttle 22, the extraction channel 20 merges into a valve seat 23. which cooperates with an axially movable valve closing member 25 of an electrically controllable valve 26, so that when the valve closing member 25 rests on the valve seat 23, the removal channel 20 is blocked.
- the valve closing member 25 is lifted from the valve seat 23, part of the fuel under pressure passes from the pump working chamber 5 via the extraction channel 20 into a collecting chamber 27 which partially surrounds the valve closing member 25 and which is connected via a relief channel 29 either to the suction chamber 9 or to a fuel reservoir .
- the valve 26 thus controls a bypass for the fuel.
- the valve closing member 25 is guided axially by a soft magnetic core 31 arranged inside a valve housing 30.
- the core 31 forms the inner part of a soft magnetic pole housing 35 which almost completely surrounds a magnetic coil 34 and which is embedded in the valve housing 30.
- the valve closing member 25 is fixedly connected to an armature 37 at its end facing away from the valve seat 23, a first magnetic gap being located between the armature 37 and one end face of the core 31 and a second magnetic gap being located between the armature 37 and an outer end face of the pole housing 35.
- valve closing member 25 when the valve closing member 25 is lifted from the valve seat 23, the solenoid 34 is supplied with electric current, the armature 37 is pulled towards the pole housing 35 while reducing the thickness of the magnetic gaps, whereby the valve closing member 25 moves towards the valve seat 23; the valve 26 closes.
- a pressure spring 38 acts, which on the other hand is supported on the bottom of a cup-shaped adjusting sleeve 40.
- the adjusting sleeve 40 can slide axially in a shoulder 41 of reduced diameter of the valve housing 30.
- the adjusting sleeve 40 is averted from the spring 38 and is supported by an adjusting screw 43 means of its thread within the valve housing 30 is axially adjustable. By turning the adjusting screw 43, the axial position of the adjusting sleeve 40 can be changed, which directly changes the pretension of the spring 38 acting on the armature 37.
- the adjusting screw 43 thus serves to set that opening pressure in the pump work chamber 5 at which the valve closing member 25 lifts off the valve seat 23, ie the valve 26 opens.
- the sensors can be designed, for example, as position, speed or acceleration sensors or as switches 50a and arranged in the valve 26 in such a way that the latter generates a signal at the same time that the valve closing member 25 lifts off the valve seat 23. This signal is assigned to an electronic control unit 52.
- An indirectly working method for generating an opening signal to be assigned to the electronic control unit 52 consists in attaching a pressure sensor 50b, which detects the pressure in the pump work chamber 5 and which generates a measurement signal as soon as the pressure in the pump work chamber 5 is reached at which the valve 26 opens.
- Another method for generating an opening signal is to detect the axial movement of the pump piston 3 by means of a displacement sensor 50c. This is also an indirect method for detecting the opening time of the valve 26. This is only intended to reflect a selection of methods for determining the start of opening of the valve 26 and in this way establishing a start and reference time. Ultimately, it is crucial to receive an electrical signal that reports to the electronic control unit 52 the time at which the valve closing member 25 lifts off the valve seat 23, and consequently a part of the fuel via the extraction channel 20, the throttle 22 and the relief channel 29 from the pump work chamber 5 can flow off.
- the electronic control unit 52 is also assigned further electrical signals, which above all describe the position of an accelerator pedal 58, determined, for example, via a further travel sensor 59 and the speed 62 of the internal combustion engine.
- the pump piston 3 is moved axially in the direction of the pump working chamber 5 by the cam drive, as is described in FIG. 2.
- Element pressure p EL in the pump work space 5 is equal to the pressure in the extraction channel 20 immediately in front of the valve seat 23. If this element pressure increases with increasing compression, the counter pressure of the spring 38 rises, the valve closing member 25 lifts off the valve seat 23, fuel can thus be throttled by Throttle 22 via the collecting space 27 in the relief channel 29 and from there flow into the suction space 9 or in the fuel tank. After opening the valve 26, only a part of the fuel delivered by the pump piston 3 reaches the injection valves, while the other part can flow out at least temporarily via the opened valve 26.
- valve 26 which is completely currentless, opens like a check valve only due to the force of the element pressure p EL .
- valve 26 is fully open,
- Fuel can both reach the respective injection valve via the relief duct 10 and the fuel delivery line 14 and also flow out via the throttle 22 and the relief duct 29.
- a time difference .DELTA.t (see FIG. 4) is determined within the electronic control unit 52, after the end of which the magnetic coil 34 is supplied with electrical current by the electronic control unit 52.
- the element pressure in the pump work space is only subject to the back pressure of the injection nozzles, a pressure reduction via the extraction channel 20, the throttle 22 and the relief channel 29 is no longer possible, as a result of which the element pressure p EL and thus the fuel injection rate suddenly increases.
- This increase after the time t s is shown in FIG. 4 by the dash-dotted line. If the axial movement of the pump piston 3 leads into the area of the opening of the transverse bore 15 through the ring slide 16, the element pressure p EL drops sharply, the fuel delivery to the injection valves has ended.
- the opening time of the valve 26 is denoted by ⁇ t ö in FIG. 3, that is to say that time difference t 1 -t 0 which the valve closing member 25 requires in order to open completely due to the element pressure.
- ⁇ t s is the pull-in delay time of the armature 37 and thus denotes the closing time of the valve 26, that is to say that period of time between the electrical closing signal of the electronic control unit 52 and the actual contact of the valve closing member 25 on the valve seat 23.
- the simply dashed line in FIGS. 3 and 4 represents the axial movement of the valve closing member 25 (h V ) or the element pressure (p EL ) for a higher load state of the internal combustion engine.
- the time difference .DELTA.t during which the electronic control unit 52 causes the valve 26 to close. Due to the early closing of the bypass, a higher element pressure is built up earlier in the pump work chamber 5 than in the previous example, as a result of which the fuel quantity emitted by the injection valve increases.
- the smaller the time difference A t t s - t 0 formed within the electronic control unit 52, the smaller the amount of fuel flowing out through the throttle 22 and the greater the amount of fuel sprayed off by the injection valves.
- the other limit case is formed by the lowest idling mode of the internal combustion engine. In Figures 3 and 4, this load case is shown with a solid line. If the internal combustion engine is idling, which is transmitted to the electronic control unit 52 via the speed sensor 62 and the further travel sensor 59, the energization of the solenoid 34 can be completely omitted.
- the valve 26 therefore opens due to the increasing element pressure p EL when the pump piston 3 begins to deliver, remains in this open position and closes due to pressure when the pump working chamber 5 is relieved by opening the relief channel 10 by means of the ring slide 16. In certain cases, For example, when the engine is cold, in order to achieve a larger injection quantity, it may also be necessary to prematurely close the valve 26 by energizing the solenoid 34 even in idle operation.
- the relief duct 10 is located in the housing 1. It opens into the pump working chamber 5 on the one hand, and into the suction chamber 9 on the other hand and can be closed by means of a further solenoid valve 72.
- the solenoid valve 72 which, in contrast to the valve 26, has no upstream throttle, replaces the ring slide 16 of the first exemplary embodiment and, like this, determines the start and end of delivery. The start of delivery is determined by the closing and the end of delivery by opening the solenoid valve 72. After opening the solenoid valve 72, the fuel delivered by the pump piston 3 no longer reaches the injection valves, but flows out via the relief duct 10 into the suction chamber 9 or into the fuel reservoir.
- the solenoid valve 72 can also be used instead of the transmitters 50a, b, c to determine the reference point in time, in that the point in time at which the solenoid valve 72 closes (for example by electromagnetic actuation) and thus the fuel delivery to the injection valves begins in the electronic control unit 52 is stored as the initial time t 0 , from which the time difference ⁇ t for closing the valve 26 is then calculated.
- Valve 26 and solenoid valve 72 are therefore components of a common control concept, which is defined within the electronic control unit 52. The start and end of delivery is determined by solenoid valve 72, and the delivery rate by valve 26.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873711744 DE3711744A1 (de) | 1987-04-07 | 1987-04-07 | Verfahren und vorrichtung zur steuerung der kraftstoffeinspritzmenge |
DE3711744 | 1987-04-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0309501A1 true EP0309501A1 (de) | 1989-04-05 |
EP0309501B1 EP0309501B1 (de) | 1993-01-07 |
Family
ID=6325079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88902423A Expired - Lifetime EP0309501B1 (de) | 1987-04-07 | 1988-03-26 | Kraftstoffeinspritzpumpe für Brennkraftmaschinen |
Country Status (6)
Country | Link |
---|---|
US (1) | US4974564A (de) |
EP (1) | EP0309501B1 (de) |
JP (1) | JP2818175B2 (de) |
KR (1) | KR960013108B1 (de) |
DE (2) | DE3711744A1 (de) |
WO (1) | WO1988008080A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7100579B2 (en) | 2000-07-10 | 2006-09-05 | Mitsubishi Heavy Industries, Ltd. | Fuel injection device |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0374569A (ja) * | 1989-08-15 | 1991-03-29 | Fuji Heavy Ind Ltd | ガソリンエンジンの燃料噴射制御装置 |
DE3934953A1 (de) * | 1989-10-20 | 1991-04-25 | Bosch Gmbh Robert | Magnetventil, insbesondere fuer kraftstoffeinspritzpumpen |
DE3937709A1 (de) * | 1989-11-13 | 1991-05-16 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE4016309A1 (de) * | 1990-05-21 | 1991-11-28 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
EP0669457B1 (de) * | 1992-03-26 | 1998-09-02 | Zexel Corporation | Kraftstoff-Einspritzvorrichtung |
DE4415826C2 (de) * | 1994-05-05 | 2000-07-13 | Deutz Ag | Luftverdichtende Brennkraftmaschine |
JP3999855B2 (ja) * | 1997-09-25 | 2007-10-31 | 三菱電機株式会社 | 燃料供給装置 |
EP2282043B1 (de) | 2009-07-02 | 2013-04-17 | Continental Automotive GmbH | Flüssigkeitseinspritzvorrichtung und Verfahren und Gerät zum Betreiben der Flüssigkeitseinspritzvorrichtung |
KR101144504B1 (ko) * | 2010-10-20 | 2012-05-11 | 현대중공업 주식회사 | 가변 압력실을 가지는 연료분사펌프 |
DE102016200016B4 (de) * | 2016-01-05 | 2017-12-21 | Continental Automotive Gmbh | Schaltventil für ein Kraftstoffeinspritzsystem, Kraftstoffhochdruckpumpe für ein Kraftstoffeinspritzsystem sowie Ansteuerverfahren zum Ansteuern eines Schaltventils in einer Kraftstoffhochdruckpumpe |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2503346C2 (de) * | 1975-01-28 | 1986-04-03 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffverteilereinspritzpumpe für Brennkraftmaschinen |
FR2481752A1 (fr) * | 1980-04-30 | 1981-11-06 | Renault Vehicules Ind | Amelioration des dispositifs mecaniques d'injection de combustible, notamment pour des moteurs diesel |
US4434675A (en) * | 1981-09-11 | 1984-03-06 | Excelermatic Inc. | Transmission ratio control arrangement for a precess cam controlled infinitely variable traction roller transmission |
DE3211680A1 (de) * | 1982-03-30 | 1983-10-06 | Espenschied Helmut Dipl Ing | Kraftstoffeinspritzsystem fuer brennkraftmaschinen |
JPS5918243A (ja) * | 1982-07-23 | 1984-01-30 | Nissan Motor Co Ltd | 燃料噴射ポンプ |
JPS5932633A (ja) * | 1982-08-16 | 1984-02-22 | Nissan Motor Co Ltd | デイ−ゼル機関の燃料噴射制御装置 |
JPS59203876A (ja) * | 1983-05-07 | 1984-11-19 | Toyota Motor Corp | デイ−ゼル機関の着火時期検出装置 |
US4562810A (en) * | 1983-06-23 | 1986-01-07 | Nippondenso Co., Ltd. | Fuel injection pump |
US4497298A (en) * | 1984-03-08 | 1985-02-05 | General Motors Corporation | Diesel fuel injection pump with solenoid controlled low-bounce valve |
JPS60162238U (ja) * | 1984-04-05 | 1985-10-28 | 株式会社ボッシュオートモーティブ システム | 燃料噴射装置 |
DE3524590A1 (de) * | 1984-07-13 | 1986-02-13 | Volkswagen AG, 3180 Wolfsburg | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE3633107A1 (de) * | 1986-04-10 | 1987-10-15 | Bosch Gmbh Robert | Kraftstoffeinspritzvorrichtung fuer brennkraftmaschinen |
-
1987
- 1987-04-07 DE DE19873711744 patent/DE3711744A1/de not_active Withdrawn
-
1988
- 1988-03-26 WO PCT/DE1988/000197 patent/WO1988008080A1/de active IP Right Grant
- 1988-03-26 EP EP88902423A patent/EP0309501B1/de not_active Expired - Lifetime
- 1988-03-26 KR KR1019880701618A patent/KR960013108B1/ko not_active IP Right Cessation
- 1988-03-26 JP JP63502515A patent/JP2818175B2/ja not_active Expired - Lifetime
- 1988-03-26 US US07/290,166 patent/US4974564A/en not_active Expired - Fee Related
- 1988-03-26 DE DE8888902423T patent/DE3877302D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO8808080A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7100579B2 (en) | 2000-07-10 | 2006-09-05 | Mitsubishi Heavy Industries, Ltd. | Fuel injection device |
Also Published As
Publication number | Publication date |
---|---|
JP2818175B2 (ja) | 1998-10-30 |
DE3877302D1 (de) | 1993-02-18 |
US4974564A (en) | 1990-12-04 |
JPH01502768A (ja) | 1989-09-21 |
KR890700752A (ko) | 1989-04-27 |
WO1988008080A1 (en) | 1988-10-20 |
KR960013108B1 (ko) | 1996-09-30 |
DE3711744A1 (de) | 1988-10-27 |
EP0309501B1 (de) | 1993-01-07 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 19881110 |
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17Q | First examination report despatched |
Effective date: 19900201 |
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RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ROBERT BOSCH GMBH |
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GRAA | (expected) grant |
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AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: LAUFER, HELMUT |
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