EP0690222B1 - Einspritzvorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine - Google Patents

Einspritzvorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine Download PDF

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Publication number
EP0690222B1
EP0690222B1 EP94810381A EP94810381A EP0690222B1 EP 0690222 B1 EP0690222 B1 EP 0690222B1 EP 94810381 A EP94810381 A EP 94810381A EP 94810381 A EP94810381 A EP 94810381A EP 0690222 B1 EP0690222 B1 EP 0690222B1
Authority
EP
European Patent Office
Prior art keywords
fuel
piston
injection
injection device
accordance
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
Application number
EP94810381A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0690222A1 (de
Inventor
Robert Hofer
Paul Weber
Erwin Matter
Klaus Heim
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.)
Wartsila NSD Schweiz AG
Original Assignee
Wartsila NSD Schweiz AG
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 Wartsila NSD Schweiz AG filed Critical Wartsila NSD Schweiz AG
Priority to EP94810381A priority Critical patent/EP0690222B1/de
Priority to DK94810381T priority patent/DK0690222T3/da
Priority to DE59408588T priority patent/DE59408588D1/de
Priority to JP10577595A priority patent/JP3597910B2/ja
Priority to KR1019950012979A priority patent/KR100364070B1/ko
Priority to CN95106181A priority patent/CN1057818C/zh
Priority to FI953161A priority patent/FI106973B/fi
Publication of EP0690222A1 publication Critical patent/EP0690222A1/de
Application granted granted Critical
Publication of EP0690222B1 publication Critical patent/EP0690222B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M59/32—Varying fuel delivery in quantity or timing fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
    • 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
    • F02M59/205—Quantity of fuel admitted to pumping elements being metered by an auxiliary metering device

Definitions

  • the invention relates to an injection device for fuel injection one Reciprocating internal combustion engine according to the generic term of Claim 1.
  • injectors for example in diesel engines the fuel under high pressure injected into the cylinder.
  • the injection process has a very specific cycle, i.e. at the right time and with the right amount respectively.
  • Conventional fuel injection systems with Cam controls are mechanically complex and also for example, only flexible with regard to the Optimizing fuel consumption and emissions.
  • Similar injection systems as the one after The preamble of the invention are known for Cars and trucks. All of these systems are not suitable for operation with heavy oil, have only a purely timed Fuel quantity metering and the High-pressure fuel storage is not against leakage protected.
  • French Patent No. 1 206 849 describes a self-regulating piston pump for a fuel injection for internal combustion engines.
  • the piston pump has one rotating control piston, which is driven by the engine.
  • the injection quantity the piston pump per piston stroke can be changed with a throttle device.
  • the object of the invention is to provide an injection device with which the Injection process is improved.
  • Such is according to the invention Injector through the features in the hallmark of the independent Claim 1 marked.
  • the dependent claims relate to advantageous developments of the invention.
  • the injection controlled the fuel with a control piston and a metering piston and supervised.
  • the control piston is advantageously hydraulic in one direction electric hydraulic valve actuated and switched. If a for redundancy reasons mechanical drive of the control piston is desired, this is also possible.
  • a corresponding arrangement can also be provided in the other direction or the actuation in the other direction can be with the under pressure standing fuel, with a separate control hydraulics with control oil or with a spring.
  • the control piston controls both the inlet of the fuel to the metering piston and also the outlet of the fuel from the metering piston chamber to the injection nozzle of the Cylinder of the engine.
  • the controls e.g. the grooves and / or holes are arranged so that both, both the Inflow of the fuel to the metering piston as well as the outflow of the fuel to the Injector valve of the cylinder is open.
  • the control piston To start the injection, the control piston must be lifted off its seat, so that a direct connection from the high-pressure fuel reservoir to the injection nozzle arises.
  • the metering piston In the metering piston is located on this connection path, which during the fuel injection process is dragged along. His way, multiplied by his Cross-sectional area, represents exactly the injected Volume of fuel.
  • inductive displacement sensor included in the electrical Control processed and used as an injection end signal Pilot valve sent. This in turn directs the Return movement of the control piston, so that its seat seals the connection from the high pressure fuel storage to Injection valve interrupted and with it the injection is ended.
  • the dosing piston becomes a volumetric one Injection realized.
  • Injection volume can be kept constant, which at a pure time-controlled injection would not be possible.
  • the Injection device according to the invention the ignition pressure the permissible value is regulated so that the cheapest fuel consumption is achieved.
  • the dosing piston fulfills another task. in the In the event of control failure or blocking of the control piston, it limits the injection volume to maximum volume provided during operation. In one Trap can be measured from the electrical control are found to be too large injection has occurred. The next and further Injections can thus be suppressed and displayed.
  • the Injection line build up the pressure because of the spool not absolutely against the fuel under high pressure from to seals to 2000 bar and more. To prevent this from happening relieves the line with a relief control valve become. This prevents uncontrolled injection.
  • a lead value must be added to the signal of the metering piston displacement meter, so that the fuel supply with the control piston is closed in time can, what enables a clean regulation and prevents that from the Speed controller demanded injection volume is exceeded.
  • this lead value is a stored, approximate value. After the start this will be The value is constantly adapted to the current conditions by means of an adaptive control.
  • FIG. 1 and 2 show schematically and partially in one Cut the injector 1, which of the High pressure pump 8 and the accumulator 81 with fuel is loaded.
  • the input channel 2 for the fuel branches into channel 21 to the rear of the as Differential piston formed metering piston 3 and in the Main channel 22, with the fuel via the groove 41 of the Control piston 4 to the input channel section 23 in the Dosing piston chamber 30 is guided.
  • the Control valve 61 of the control hydraulics 6, which is an inlet and has a return, with control oil that is under pressure stands the end face 43 of the control piston 4 is after moved down.
  • the pilot valve receives its Control commands from the control electronics 7, which are therefor ensures that the fuel injection process is correct Timed and done with the right amount.
  • the pilot valve 61 is closed and the return opened for the control oil, the control piston 4 through those acting on the end face 44 of the control piston 4 Fuel pressure and spring force pushed up.
  • the Fuel supply to channel 25 is interrupted and thus brought about the injection end.
  • Fig. 2 shows a control piston 4 'with only two Sealing points 46 ', where only very small amounts of leakage occur. In this embodiment, three are constantly sealing Sealing points against those under high pressure Fuel off.
  • This version has a higher one Hydraulic efficiency as a variant 1. The Injector is also thanks to the smaller Leakage currents less heated.
  • control piston 4 In order to maintain a long service life of the control piston 4, it is hardened on its surface. Anything can a suitable hardening process can be used.
  • the control piston and associated bushing can be designed in this way be that when they're worn out they're light can be exchanged. So this sleeve can be used as a cone be inserted into the housing, what the exchange of this Bush, together with the control piston, as a whole Control unit enables and makes easy.
  • control pistons can also be used for a metering piston the associated pilot valves and injectors to be ordered.
  • the individual Injection nozzles of a cylinder individually in time can be controlled.
  • the encoder 72 for the control electronics works with advantage inductive. But there are also other measuring systems that work capacitively, optically, magnetically or in any other way suitable to monitor the position of the dosing piston and to eat.
  • the influence of dead time, i.e. of the Delay of the system on the functional accuracy of the Minimizing the injector can be an adaptive Injection volume control with adaptive components be provided.
  • Monitoring and control of the current situation and Actual speed of the dosing piston can at any time with its target position and target speed compared become.
  • Deviation i.e. Difference between target and The electronics can deduce the actual value from whether too much, too little fuel or the fuel too fast or too is slowly injected.
  • the size of these deviations can, for example, when reaching a predetermined Limit value can be used to trigger an alarm, the injection of an affected cylinder too suppress and reduce the power of the engine.
  • control piston is in the Closing direction with the high pressure Fuel, in one case with an additional spring driven.
  • a separate hydraulic drive also in the closing direction and not just in the opening direction.
  • the control piston in the Examples are described and shown as one piece. However, it is easily possible to remove the control piston several pieces, possibly even different ones Materials or differently treated materials manufacture. The individual pieces can then be fixed together be connected or only due to the pressure and Force ratios on the control piston are constantly adjacent. It is also conceivable to use a control piston mechanical camshaft and hydraulic rod too actuate. However, this only as redundancy in the event where the hydraulic drive is faulty or fails.
  • Injectors in diesel engines work with one Fuel pressure in the range from 400 bar to over 2000 bar and the pressure in the hydraulic control circuit can for example with a pressure in the range of 100 to 400 work in cash.
  • the injector as shown can be both for the injection of diesel oil as well as for heavy oil be used. This allows using the cold engine To start diesel oil and as soon as necessary for heavy oil higher operating temperature is reached on heavy fuel oil switch.

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)
EP94810381A 1994-06-27 1994-06-27 Einspritzvorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine Expired - Lifetime EP0690222B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP94810381A EP0690222B1 (de) 1994-06-27 1994-06-27 Einspritzvorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine
DK94810381T DK0690222T3 (da) 1994-06-27 1994-06-27 Indsprøjtningsindretning til indsprøjtning af brændstof ved en stempelforbrændingsmotor
DE59408588T DE59408588D1 (de) 1994-06-27 1994-06-27 Einspritzvorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine
JP10577595A JP3597910B2 (ja) 1994-06-27 1995-04-28 ピストン往復動型内燃機関における燃料噴射装置
KR1019950012979A KR100364070B1 (ko) 1994-06-27 1995-05-24 왕복피스톤내연기관의연료분사장치
CN95106181A CN1057818C (zh) 1994-06-27 1995-06-05 往复活塞式内燃机的燃料喷射装置
FI953161A FI106973B (fi) 1994-06-27 1995-06-26 Ruiskutuslaitteisto iskumäntäpolttomoottorikoneen polttoaineen ruiskuttamiseksi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94810381A EP0690222B1 (de) 1994-06-27 1994-06-27 Einspritzvorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0690222A1 EP0690222A1 (de) 1996-01-03
EP0690222B1 true EP0690222B1 (de) 1999-08-04

Family

ID=8218276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94810381A Expired - Lifetime EP0690222B1 (de) 1994-06-27 1994-06-27 Einspritzvorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine

Country Status (7)

Country Link
EP (1) EP0690222B1 (fi)
JP (1) JP3597910B2 (fi)
KR (1) KR100364070B1 (fi)
CN (1) CN1057818C (fi)
DE (1) DE59408588D1 (fi)
DK (1) DK0690222T3 (fi)
FI (1) FI106973B (fi)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110748447A (zh) * 2019-09-30 2020-02-04 广西擎芯动力科技有限公司 重油活塞发动机燃油气辅助喷射用低功耗驱动气体计量阀

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4574762B2 (ja) * 1998-08-28 2010-11-04 ヴェルトジィレ シュヴァイツ アクチェンゲゼルシャフト 往復ピストンエンジンの燃料噴射装置
DE59910639D1 (de) * 1998-09-21 2004-11-04 Waertsilae Schweiz Ag Winterth Hubkolbenbrennkraftmaschine
JP2007085214A (ja) * 2005-09-21 2007-04-05 Nabtesco Corp 機関用流体供給装置の計量機構
KR20150146245A (ko) 2014-06-23 2015-12-31 천승준 우산꽂이대 및 이를 이용한 쇼핑카트
DE102016223838A1 (de) * 2016-11-30 2018-05-30 Robert Bosch Gmbh Leckageprüfvorrichtung einer Tankanordnung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1206849A (fr) * 1958-05-19 1960-02-11 Perfectionnements apportés aux pompes à pistons autorégulatrices, notamment pour l'injection de combustible dans les moteurs
US3191812A (en) * 1964-02-25 1965-06-29 Honda Gijutsu Kenkyusho Kk High pressure fuel injection apparatus for internal combustion engines
GB1404584A (en) * 1971-10-15 1975-09-03 Cav Ltd Liquid fuel injection pumping apparatus for an internal combustion engine
DE3001155A1 (de) * 1980-01-15 1981-07-16 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzanlage fuer selbstzuendende brennkraftmaschine
US4422424A (en) * 1981-06-23 1983-12-27 The Bendix Corporation Electronically controlled fuel injection pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110748447A (zh) * 2019-09-30 2020-02-04 广西擎芯动力科技有限公司 重油活塞发动机燃油气辅助喷射用低功耗驱动气体计量阀
CN110748447B (zh) * 2019-09-30 2020-11-20 黎鑫悦 重油活塞发动机燃油气辅助喷射用低功耗驱动气体计量阀

Also Published As

Publication number Publication date
FI106973B (fi) 2001-05-15
DK0690222T3 (da) 1999-12-06
JPH0842423A (ja) 1996-02-13
FI953161A0 (fi) 1995-06-26
KR960001449A (ko) 1996-01-25
EP0690222A1 (de) 1996-01-03
JP3597910B2 (ja) 2004-12-08
DE59408588D1 (de) 1999-09-09
KR100364070B1 (ko) 2003-02-26
CN1118411A (zh) 1996-03-13
FI953161A (fi) 1995-12-28
CN1057818C (zh) 2000-10-25

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