EP0195948B1 - Einspritzvorrichtung für Kraftstoffe bei Dieselmotoren - Google Patents

Einspritzvorrichtung für Kraftstoffe bei Dieselmotoren Download PDF

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Publication number
EP0195948B1
EP0195948B1 EP86102511A EP86102511A EP0195948B1 EP 0195948 B1 EP0195948 B1 EP 0195948B1 EP 86102511 A EP86102511 A EP 86102511A EP 86102511 A EP86102511 A EP 86102511A EP 0195948 B1 EP0195948 B1 EP 0195948B1
Authority
EP
European Patent Office
Prior art keywords
injection
pump
nozzle
pressure
motor
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
EP86102511A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0195948A3 (en
EP0195948A2 (de
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/de
Publication of EP0195948A3 publication Critical patent/EP0195948A3/de
Application granted granted Critical
Publication of EP0195948B1 publication Critical patent/EP0195948B1/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
    • 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, wherein an additional pump is switched on in the fuel supply to the injection pump and the suction space of the injection pump can be pressurized with a pre-pressure.
  • the object of the invention is to improve injection devices of the known type by increasing the overall pressure level and to provide a device for relatively high injection pressures in a simple and reliable manner, which enables a practical solution and ensures a mixture formation that is adaptable to the present operating conditions in an optimized ratio.
  • the spring space 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 varying the start of the injection by influencing the opening time via the selection of the admission pressure. This aspect is particularly important for the optimization of fuel consumption in diesel engines.
  • the feed line for the spring chamber of the injection nozzle has a pressure control valve controlled by a regulator, the regulator 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 injector 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 n Mot , charge F, charge air temperature t Lt , cooling water temperature t Kw , 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 further in a return line 17 from the suction space of the injection pump 5 are provided with a multi-way valve 16 in order to enable a ring system in heavy oil engines for the circulation of the preheated fuel when the engine is at a standstill .
  • the pump piston of the injection pump 5 to deliver the fuel via the injection nozzle 8 into the cylinder after the pressure in the pressure line 7 has been reached.
  • the respective pressure by the pressure control valve 18 in the spring chamber of the injection nozzle 8 is higher than the pre-pressure in the suction chamber of the injection pump 5 It is thus ensured that, if the admission pressure is specified accordingly, the opening and closing of the nozzle needle of the injection pump 5 takes place at pressure values which already guarantee optimal mixture formation ratios.

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 Einspritzvorrichtung für Kraftstoffe bei Dieselmotoren Expired - Lifetime EP0195948B1 (de)

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 EP0195948A2 (de) 1986-10-01
EP0195948A3 EP0195948A3 (en) 1989-09-06
EP0195948B1 true EP0195948B1 (de) 1991-06-26

Family

ID=6265950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102511A Expired - Lifetime EP0195948B1 (de) 1985-03-22 1986-02-26 Einspritzvorrichtung für Kraftstoffe bei Dieselmotoren

Country Status (3)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255350A3 (en) * 1986-07-30 1989-05-24 Ambac International Corporation High pressure fuel injection system
DE3811773A1 (de) * 1988-04-08 1989-10-19 Pierburg Gmbh Brennstoffversorgungseinrichtung fuer eine brennkraftmaschine
DE19937674B4 (de) * 1999-08-10 2005-02-17 Siemens Ag Einspritzanlage für eine Brennkraftmaschine
DE102012221524A1 (de) 2012-11-26 2014-05-28 Bayerische Motoren Werke Aktiengesellschaft Einspritzvorrichtung für einen Verbrennungsmotor

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 (en) * 1984-07-03 1987-05-13 Baralaba Pty Ltd LIQUID PUMP.

Also Published As

Publication number Publication date
DE3510301A1 (de) 1986-09-25
EP0195948A3 (en) 1989-09-06
EP0195948A2 (de) 1986-10-01
DE3679925D1 (de) 1991-08-01
DE3510301C2 (enrdf_load_stackoverflow) 1991-01-10
JPS61223264A (ja) 1986-10-03

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