EP0195948A2 - Dispositif d'injection de combustible pour moteurs Diesel - Google Patents

Dispositif d'injection de combustible pour moteurs Diesel Download PDF

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Publication number
EP0195948A2
EP0195948A2 EP86102511A EP86102511A EP0195948A2 EP 0195948 A2 EP0195948 A2 EP 0195948A2 EP 86102511 A EP86102511 A EP 86102511A EP 86102511 A EP86102511 A EP 86102511A EP 0195948 A2 EP0195948 A2 EP 0195948A2
Authority
EP
European Patent Office
Prior art keywords
injection
pump
pressure
nozzle
injection device
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
Application number
EP86102511A
Other languages
German (de)
English (en)
Other versions
EP0195948A3 (en
EP0195948B1 (fr
Inventor
Hugo Dipl.-Ing. Fiedler
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.)
Caterpillar Motoren GmbH and Co KG
Original Assignee
Krupp Mak Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krupp Mak Maschinenbau GmbH filed Critical Krupp Mak Maschinenbau GmbH
Publication of EP0195948A2 publication Critical patent/EP0195948A2/fr
Publication of EP0195948A3 publication Critical patent/EP0195948A3/de
Application granted granted Critical
Publication of EP0195948B1 publication Critical patent/EP0195948B1/fr
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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/18—Feeding by means of driven pumps characterised by provision of main and auxiliary pumps
    • 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
    • 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 relates to an injection device for fuels in diesel engines, consisting of an injection pump driven by the engine and a spring-loaded nozzle holder of the injection nozzle.
  • the injection pump is driven by a corresponding cam of the engine.
  • the amount of fuel injected is influenced by an adjustable inclined edge located on the pump plunger and an overflow bore located in the pump element itself, or in other cases by overflow valves that can be regulated at the time of opening.
  • the achievable injection pressure is dependent on the engine speed and thus causes low injection pressures and the associated mixture formation ratios, especially at low engine speeds.
  • Injection systems are also known in which fuel upstream in the injectors is conveyed via a special high-pressure pump.
  • the injection pump, the start of injection and the injection duration are regulated by externally controlled opening and closing of the nozzle needles.
  • This actuation is carried out mechanically, for example via rocker arms, bumpers and corresponding control devices take, whereby the control takes place by cams on the camshaft as well as by electronic control of electro-hydraulic actuation mechanisms.
  • These systems have the advantage that the fuel is introduced into the cylinder in an optimal ratio with a mixture formation at all possible loads and engine speeds.
  • the electronic-hydraulic actuation of the injection valve has so far not been developed to series production due to technical difficulties in the electro-hydraulic part of the high pressures to be overcome by the feed pumps and the high costs of the electronic control.
  • the object of the invention is to improve injection devices of the known type and to easily create a device which enables a practical solution and ensures an increase in the overall pressure level.
  • an additional pump in the form of an independently drivable high-pressure pump is switched on in the fuel supply to the injection pump, and a high admission pressure can be applied to the suction chamber of the injection pump.
  • a conventional intermittent injection system is raised in its entire pressure level by the additional pump in such a way that both opening and closing of the nozzle needle takes place at pressures which are already optimal for the combustion. Improvements in mixture formation are also achieved.
  • the spring space of the nozzle holder of the injection nozzle can be acted upon simultaneously by the pressure of the additional pump.
  • the opening and closing pressure of the valve of the injection nozzle changed by appropriate support of the spring, but there is also the possibility of influencing the time of opening via the.
  • Choice of the admission pressure to vary the beginning of the injection This aspect is particularly important for the optimization of fuel consumption in diesel engines.
  • the additional pump can be controlled via a controller, which can be supplied with setpoint inputs of the motor via a computing unit.
  • the supply line for the spring space of the nozzle holder of the injection nozzle has a pressure control valve controlled by a controller, the controller being able to be supplied with setpoint inputs of the engine via a computing unit.
  • the fuel supply line to the injection pump can be switched as multi-way valves and additional lines as a ring line when the engine is not running.
  • the fuel is fed via a feed pump 1 from a fuel tank 2 via line 3 to a pump 4, which generates a pre-pressure for an injection pump 5 and is connected via a line 6 to the suction chamber of the injection pump 5.
  • the injection pump 5 delivers the fuel to an injection nozzle 8 via a pressure line 7 Via a line 9, the spring space of the nozzle holder of the injection nozzle 8 is acted upon by the pre-pressure of the pump 4.
  • the pump 4 for generating the admission pressure is controlled by a controller 10, which can be supplied with setpoint inputs of the engine via a computing unit 11.
  • a controller 10 which can be supplied with setpoint inputs of the engine via a computing unit 11.
  • the speed of the engine nMot, charge F, charge air temperature t Lt , cooling water temperature tKw, fuel temperature t Br st is taken into account, for example, via the computing unit 11.
  • a pressure control valve 18 is switched on in line 9 as a supply space to the spring space of the injector 8, which can be controlled via a controller 12 and at the same time influenced by the computing unit 11. This makes it possible to set different pressure ratios on the injection nozzle 8 and as a pre-pressure on the injection pump 5 by hydraulic means.
  • multi-way valves 13, 14 for controlling an additional line 15 and also in a return line 17 from the suction chamber of the injection pump 5 are provided with a multi-way valve 16 to enable a ring system in heavy oil engines for the circulation of the preheated fuel when the engine is stopped .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP86102511A 1985-03-22 1986-02-26 Dispositif d'injection de combustible pour moteurs Diesel Expired - Lifetime EP0195948B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3510301 1985-03-22
DE19853510301 DE3510301A1 (de) 1985-03-22 1985-03-22 Einspritzvorrichtung fuer kraftstoffe bei dieselmotoren

Publications (3)

Publication Number Publication Date
EP0195948A2 true EP0195948A2 (fr) 1986-10-01
EP0195948A3 EP0195948A3 (en) 1989-09-06
EP0195948B1 EP0195948B1 (fr) 1991-06-26

Family

ID=6265950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102511A Expired - Lifetime EP0195948B1 (fr) 1985-03-22 1986-02-26 Dispositif d'injection de combustible pour moteurs Diesel

Country Status (3)

Country Link
EP (1) EP0195948B1 (fr)
JP (1) JPS61223264A (fr)
DE (2) DE3510301A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255350A3 (fr) * 1986-07-30 1989-05-24 Ambac International Corporation Système d'injection de combustible à haute pression
EP0336060A3 (fr) * 1988-04-08 1990-03-21 Pierburg Gmbh Dispositif d'alimentation en carburant pour un moteur à combustion interne
WO2014079646A1 (fr) * 2012-11-26 2014-05-30 Bayerische Motoren Werke Aktiengesellschaft Dispositif d'injection pour moteur à combustion interne

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19937674B4 (de) * 1999-08-10 2005-02-17 Siemens Ag Einspritzanlage für eine Brennkraftmaschine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1046402B (de) * 1955-12-31 1958-12-11 Daimler Benz Ag Kraftstoffoerderanlage fuer elektrisch anlassbare Brennkraftmaschinen
DE1064290B (de) * 1957-02-05 1959-08-27 Daimler Benz Ag Kraftstoffoerderanlage fuer Brennkraftmaschinen, insbesondere in Kraftfahrzeugen
FR1543434A (fr) * 1967-09-13 1968-10-25 Peugeot Dispositif d'alimentation en carburant d'un moteur à injection
US3818882A (en) * 1972-03-27 1974-06-25 O Leonov Fuel system of internal combustion engine
US3976249A (en) * 1973-05-12 1976-08-24 C.A.V. Limited Fuel injection systems for internal combustion engines
NL153975B (nl) * 1974-02-05 1977-07-15 Doornes Bedrijfswagen Fab Brandstofverbruikmeetinrichting voor een verbrandingsmotor.
DE2558790A1 (de) * 1975-12-24 1977-07-14 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer brennkraftmaschinen
GB2121116B (en) * 1982-06-01 1985-10-16 Lucas Ind Plc Fuel pumping apparatus
DE3247915A1 (de) * 1982-12-24 1984-07-12 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffoerderanlage fuer brennkraftmaschinen, insbesondere in kraftfahrzeugen
JPS6036771A (ja) * 1983-08-09 1985-02-25 Daihatsu Diesel Kk デイ−ゼル機関の燃料噴射装置
EP0216774A4 (fr) * 1984-07-03 1987-05-13 Baralaba Pty Ltd Pompe a liquides.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255350A3 (fr) * 1986-07-30 1989-05-24 Ambac International Corporation Système d'injection de combustible à haute pression
EP0336060A3 (fr) * 1988-04-08 1990-03-21 Pierburg Gmbh Dispositif d'alimentation en carburant pour un moteur à combustion interne
WO2014079646A1 (fr) * 2012-11-26 2014-05-30 Bayerische Motoren Werke Aktiengesellschaft Dispositif d'injection pour moteur à combustion interne
US9790907B2 (en) 2012-11-26 2017-10-17 Bayerische Motoren Werke Aktiengesellschaft Injection device for an internal combustion engine

Also Published As

Publication number Publication date
EP0195948A3 (en) 1989-09-06
DE3510301C2 (fr) 1991-01-10
DE3679925D1 (de) 1991-08-01
DE3510301A1 (de) 1986-09-25
JPS61223264A (ja) 1986-10-03
EP0195948B1 (fr) 1991-06-26

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