EP0030907A1 - Dispositif d'injection de carburant pour un moteur à combustion interne - Google Patents

Dispositif d'injection de carburant pour un moteur à combustion interne Download PDF

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Publication number
EP0030907A1
EP0030907A1 EP80420143A EP80420143A EP0030907A1 EP 0030907 A1 EP0030907 A1 EP 0030907A1 EP 80420143 A EP80420143 A EP 80420143A EP 80420143 A EP80420143 A EP 80420143A EP 0030907 A1 EP0030907 A1 EP 0030907A1
Authority
EP
European Patent Office
Prior art keywords
injection
pressure
drawers
needle
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.)
Ceased
Application number
EP80420143A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jean-Loyis Dazzi
Jean-Louis Froment
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.)
Renault Trucks SAS
Original Assignee
Renault Vehicules Industriels SA
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 Renault Vehicules Industriels SA filed Critical Renault Vehicules Industriels SA
Publication of EP0030907A1 publication Critical patent/EP0030907A1/fr
Ceased 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/025—Hydraulically actuated valves draining the chamber to release the closing pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87893—With fluid actuator

Definitions

  • the present invention relates to an electronic injection device for an internal combustion potter.
  • an electronic injection device for an internal combustion potter At present, the majority of diesel engines in industrial vehicles are equipped with mechanical injection devices.
  • an electronic central unit taking into account the different parameters on which the injection depends supplies an electro-valve. This is precisely where the pitfall lies: it is very difficult, if not im p os - sihle, to solve the problem of the instants of start and end of injection and that of controlling the flow rate with a single drawer, makes very high precision to be observed in a very short period of time.
  • the injection time on a truck diesel engine is around 1.3 milliseconds at full speed, and around 3 milliseconds at full speed. -gime of maximum torque. At full speed, the time between two injections is gold in the order of 50 milliseconds. The required accuracy is less than 1/10 of a millisecond, or approximately 1 sexagesimal degree of angle of rotation of the drive wheel.
  • the object of the present invention resides essen - -so in the use of a double drawer system to solve this problem.
  • the injector used is a conventional injector.
  • the injector needle is subjected on both sides to the same pressure, generated by a high pressure pump.
  • the high pressure is of the order of 1000 bars. Opening the metering valve drops the pressure downstream of the injector needle for the required time, which defines both the timing of the injection start and the control of the flow .
  • the flow is therefore regulated by the phase difference between the movements of the two drawers.
  • the drawers do not go back and forth within the time allowed for injection.
  • the opening drawer remains in its opening position when the closing drawer controls the end of injection.
  • the drawers move again one after the other, but in the opposite direction to their previous displacement, only then returning to their initial position. This frees you from the operating times of the solenoid valves.
  • the flow rate is only adjusted by the phase shift between the movements of the two drawers.
  • a single assembly with two drawers is successively brought into contact with each injector by a rotary distributor in the order of ignition of the engine.
  • the drawers are actuated by electromagnets, or hydraulically, from solenoid valves. Electricity is supplied by an electronic control unit supplying the control current.
  • This control unit receives the necessary information from conventional sensors, namely: a magnetic sensor on the flywheel for locating the position of the piston, a coolant temperature sensor, a temperature sensor ( temperature sensitive to ambient temperature, a pressure sensor sensitive to atmospheric pressure or to the discharge pressure of the compressor, and other sensors.
  • FIG. 1 shows an engine equipped with the electronic injection device according to the invention.
  • a high pressure pump 1 capable of raising the pressure of the diesel to approximately 1000 bars, is actuated by the motor, for example from a connection at the level of the distribution plate.
  • This pump 1 receives the diesel by a pipe 2 coming from the tank, by means of the usual filters and priming pumps generally designated by the reference 3.
  • the pump 1 directly supplies the injectors in series with a ramp 4. When they are not controlled, the injectors do not flow, because their needle is supplied with pressure by its downstream face by means of a pipe 5.
  • the pipes 5 come from a rotary distributor 6 visible more particularly in FIGS. 2 and 3.
  • the rotor 11 of this distributor is driven at a speed which, in the case of a four-stroke engine, is equal at half the speed of the crankshaft.
  • the order of connection of the pipes5 leading to the injectors is the same as that of the ignition.
  • an orifice 8 arranged in the rotorll feeds an axial channel 9 which, via a circular groove and a pipe 7, connects the distributor to the double-slide valve 10.
  • the rotary distributor 6 connects the corresponding injector - corresponding to a two-drawer valve of the type shown in FIG. 4.
  • the drawers 12 and 13 then remain in their new position, to return to their initial position, only after having ordered another injection for another cylinder. Thus these drawers do not perform a round trip during a single injection, but only a single forward movement, or a single return movement. This allows fast operating frequencies, and good accuracy.
  • the computer 14 also has four output terminals 19,20,21, and 22. Via terminals 19 and 20, it can supply electricity to the control coils 23 and 24 of a micro-solenoid valve 25 which controls the supply of oil to the control cylinders 31 and 32 of the drawer 13.
  • the computer controls, for each injection, the start of injection and the duration injection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP80420143A 1979-12-14 1980-12-12 Dispositif d'injection de carburant pour un moteur à combustion interne Ceased EP0030907A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7931353 1979-12-14
FR7931353A FR2471483A1 (fr) 1979-12-14 1979-12-14 Dispositif d'injection de carburant pour un moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP0030907A1 true EP0030907A1 (fr) 1981-06-24

Family

ID=9233032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80420143A Ceased EP0030907A1 (fr) 1979-12-14 1980-12-12 Dispositif d'injection de carburant pour un moteur à combustion interne

Country Status (3)

Country Link
US (1) US4462369A (oth)
EP (1) EP0030907A1 (oth)
FR (1) FR2471483A1 (oth)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089301A1 (fr) * 1982-03-16 1983-09-21 RENAULT VEHICULES INDUSTRIELS Société dite: Système pour la commande de l'injection sur un moteur diesel
DE19621583C2 (de) * 1995-06-06 1999-11-18 Avl Verbrennungskraft Messtech Speichereinspritzsystem für Dieselbrennkraftmaschine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5152762A (en) * 1990-11-16 1992-10-06 Birtcher Medical Systems, Inc. Current leakage control for electrosurgical generator
US5507260A (en) * 1995-02-27 1996-04-16 Hintzen; Mark N. Fuel management system for internal combustion engines
EP1612407B1 (en) * 2004-06-30 2006-08-23 C.R.F. Società Consortile per Azioni Fuel pressure regulating system for an internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316450A1 (fr) * 1975-07-04 1977-01-28 Maschf Augsburg Nuernberg Ag Dispositif d'injection de carburant pour moteurs a combustion interne
FR2331693A2 (fr) * 1975-11-15 1977-06-10 Maschf Augsburg Nuernberg Ag Dispositif d'injection de carburant pour moteurs a combustion interne
DE2759187A1 (de) * 1977-12-31 1979-07-12 Bosch Gmbh Robert Kraftstoffeinspritzanlage mit mindestens einem kraftstoffeinspritzventil, insbesondere fuer grossmotoren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH443787A (de) * 1965-09-14 1967-09-15 Sulzer Ag Einspritzvorrichtung einer Kolbenbrennkraftmaschine
US3530884A (en) * 1969-03-07 1970-09-29 Fluidic Controls Corp Fluid logic module
US3851635A (en) * 1969-05-14 1974-12-03 F Murtin Electronically controlled fuel-supply system for compression-ignition engine
US4185779A (en) * 1978-01-16 1980-01-29 The Bendix Corporation Fuel injector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316450A1 (fr) * 1975-07-04 1977-01-28 Maschf Augsburg Nuernberg Ag Dispositif d'injection de carburant pour moteurs a combustion interne
FR2331693A2 (fr) * 1975-11-15 1977-06-10 Maschf Augsburg Nuernberg Ag Dispositif d'injection de carburant pour moteurs a combustion interne
DE2759187A1 (de) * 1977-12-31 1979-07-12 Bosch Gmbh Robert Kraftstoffeinspritzanlage mit mindestens einem kraftstoffeinspritzventil, insbesondere fuer grossmotoren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089301A1 (fr) * 1982-03-16 1983-09-21 RENAULT VEHICULES INDUSTRIELS Société dite: Système pour la commande de l'injection sur un moteur diesel
DE19621583C2 (de) * 1995-06-06 1999-11-18 Avl Verbrennungskraft Messtech Speichereinspritzsystem für Dieselbrennkraftmaschine

Also Published As

Publication number Publication date
FR2471483B1 (oth) 1984-12-07
US4462369A (en) 1984-07-31
FR2471483A1 (fr) 1981-06-19

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: FROMENT, JEAN-LOUIS

Inventor name: DAZZI, JEAN-LOYIS