EP0784749B1 - Dispositif d'alimentation en carburant pour vehicule automobile avec regulation de pression - Google Patents

Dispositif d'alimentation en carburant pour vehicule automobile avec regulation de pression Download PDF

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Publication number
EP0784749B1
EP0784749B1 EP95933465A EP95933465A EP0784749B1 EP 0784749 B1 EP0784749 B1 EP 0784749B1 EP 95933465 A EP95933465 A EP 95933465A EP 95933465 A EP95933465 A EP 95933465A EP 0784749 B1 EP0784749 B1 EP 0784749B1
Authority
EP
European Patent Office
Prior art keywords
pressure
fuel
pump
fact
regulator
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
EP95933465A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0784749A1 (fr
Inventor
Denis Ragot
Jean-Luc Taurel
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.)
Marwal Systems SAS
Original Assignee
Marwal Systems SAS
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
Priority claimed from FR9411783A external-priority patent/FR2725244B1/fr
Application filed by Marwal Systems SAS filed Critical Marwal Systems SAS
Publication of EP0784749A1 publication Critical patent/EP0784749A1/fr
Application granted granted Critical
Publication of EP0784749B1 publication Critical patent/EP0784749B1/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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/54—Arrangement of fuel pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/3082—Control of electrical fuel pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • 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
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • 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
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/224—Diagnosis of the fuel system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel 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
    • 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
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M2037/085—Electric circuits therefor
    • F02M2037/087—Controlling fuel pressure valve

Definitions

  • the present invention relates to the field of devices supply of fuel to internal combustion engines on motor vehicles.
  • conventional fuel supply systems for engines with internal combustion include a pump 10 which takes the fuel in a tank 12, and directs this fuel to the area of use, or generally to the injectors 14, via piping 16. The excess fuel is returned to the tank 12 using a return pipe 18.
  • the pump 10 comprises generally an upstream filter 11.
  • a downstream filter 13 is generally placed at the outlet of pump 10, on piping 16 feed.
  • This classic arrangement called a loop, represented on the Figure 1, has the disadvantage of leading to a warming of the fuel passing through the zone of use 14 and brought back to the tank 12 through the return duct. In addition, it requires a significant permanent flow of fuel at the outlet of pump 10, therefore a current consumption significant electrical.
  • a pressure regulator 20 working in bypass is preferably integrated on the supply line 16.
  • This pressure regulator 20 ensures the return of excess fuel to tank 12.
  • This regulator pressure 20 at its input connected to the supply line 16, generally downstream of the filter 13, by a bypass duct 15. The outlet of regulator 20 opens into tank 12.
  • Document US-A-5265644 describes a supply device in fuel for an internal combustion engine comprising a pump designed to draw fuel from a tank, a regulator placed in series on a supply line without branch connected to the output the pump upstream of the fuel use site, which regulator incorporates a pressure-sensitive contactor type element pressure prevailing in the supply line to control the setting pump service.
  • the present invention now aims to improve known fuel supply devices.
  • a internal combustion engine fuel supply device comprising a pump designed to draw fuel from a tank, an element of the pressure switch type sensitive to the pressure in a supply line without connected branch at the pump outlet and adapted to control the commissioning of the pump, and a regulator placed in series on the supply line without bypass connected to the pump outlet, upstream of the site of use of fuel, characterized in that the pressure sensitive element at a tilt threshold greater than the pressure required to use the fuel, and the regulator type regulator is located near the site of use, advantageously on a rail of injectors.
  • a set comprising a fuel tank 12, a pump 10 associated with a upstream filter 11, and a supply line 16 connected to the outlet of the pump 10 and designed to direct fuel to a site of use 14, for example an injector manifold.
  • the system further comprises a sensor 30 sensitive to the prevailing pressure in the supply line 16 and a pressure reducer 40 placed in series on the supply line 16, upstream of the site of use 14.
  • the pressure sensor 30 is connected to a control module 50 which controls the pump 10 itself.
  • the fuel tank 12 and the pump 10, preferably electric, can be the subject of many variants. These do not will therefore not be described in more detail below.
  • the pressure sensor 30 is preferably formed of a simple pressure switch.
  • the contactor illustrated in this figure 6 includes a housing 31 divided into two chambers 32, 33 by a deformable membrane 34 stressed on one side by a calibrated spring 35, and on the other by the fuel pressure to be measured in the supply line 16.
  • the sensor 30 further comprises two electrical contacts 36, 37 whose bonding state depends on the position of the membrane 34, therefore on the fuel pressure prevailing in the supply line 16.
  • one of the contacts 36 is for example secured to the housing 31 while the second contact 37 is integral with the membrane 34.
  • a first chamber 32 preferably watertight, houses the spring 35 and the two electrical contacts 36, 37.
  • the second chamber 33 is provided with a nozzle 38 allowing to put said chamber 33 in communication with the supply line 16.
  • the electrical contacts 36 and 37 are adapted to be connected, which corresponds to a switch in the closed state, when the fuel pressure in the supply line 16 is below a predetermined threshold.
  • the supply line 16 is a line without bypass, or at a dead end, connected to the outlet of the pump 10; that is to say that the supply line 16 does not include any bypass allowing return excess fuel to the tank 12.
  • the regulator regulator 40 is, as indicated previously, placed in series on the supply line 16 between the pump 10 and the site fuel use 14.
  • the regulator regulator 40 can be the subject of different embodiments.
  • a regulator regulator 40 comprising a housing 41 divided into two chambers 42, 43 by a deformable membrane 44 sensitive to pressure.
  • a first chamber 42 houses a spring tared 45 which stresses the membrane 44.
  • the second chamber 43 has an inlet 46 formed on a end piece 47 and at least one outlet 48.
  • the inlet 46 is controlled by a valve 49.
  • This valve 49 has a movable element 51 linked to the membrane 44 and which cooperates with a seat 52 linked to the housing 41.
  • the membrane 44 is biased on one side by the calibrated spring 45 and of the side order by the fuel pressure prevailing in the chamber 43.
  • the valve 49 provided on the inlet 46 opens when the pressure in chamber 43 is less than the setting force of spring 45 and the otherwise the valve 49 closes when the pressure in the chamber 43 becomes greater than the setting of spring 45.
  • the regulator regulator 40 makes it possible to obtain a pressure constant in room 43.
  • the end piece 47 which forms the inlet 46 is connected to the part of the conduit supply 16 from pump 10.
  • the output 48 is itself directed to the site of use 14 by any suitable connection.
  • the setting pressure of the pressure sensor 30 is higher than the operating pressure required at the sensor outlet regulator 40.
  • the calibration pressure of the pressure sensor 30, which corresponds to the pressure required in the supply line 16 is at least 200 mbar higher than the pressure required on site of use 14 which also corresponds to the setting pressure of the regulator regulator 40.
  • the system preferably comprises, and in a manner known per se, a filter 13 on the supply line 16.
  • the filter 13 can be located in downstream of the pressure sensor 30 as illustrated in FIG. 4, or upstream of this pressure sensor 30 as illustrated in FIG. 5, this which compensates for the possible and variable pressure drop of the filter 13 (by clogging), without increasing the pressure difference necessary for correct functioning of regulator regulator 40 ..
  • the pressure sensor 30 and / or the filter 13 can each be placed either inside the tank 12 or outside the reservoir 12, or even on a wall thereof.
  • the regulator regulator 40 is located on the site of use, preferably on the injector rail.
  • the pump 10 is also not traveled only by the fuel actually used. The consumption of pump current remains low for this reason.
  • the service life of the pump is elongated compared to known prior arrangements comprising a branch on the supply line 16.
  • the pressure sensor delivers a all or nothing information, calibrated by a pressure threshold, directly on the power stage controlling the pump 10, this pressure threshold being chosen slightly higher than the fuel use pressure by the motor as previously indicated.
  • Chamber 42 housing the calibration spring 45 of the regulator regulator 40 can be a closed chamber as illustrated in the figure 7, or an open chamber allowing this chamber 42 to be placed a reference pressure, for example atmospheric pressure or again the pressure of the intake manifold.
  • the drawing assembly comprising the pump 10 can be fitted with a fuel gauging system.
  • the invention also relates to tanks equipped with the aforementioned power system.
  • all or nothing information, calibrated against a threshold of pressure, coming from the pressure sensor 30, is applied to the computer motor control 60, as illustrated in FIGS. 4 and 5.
  • This computer 60 can also integrate the module 50 of aforementioned pump control.
  • the computer 60 can use the information from the sensor 30 to establish the diagnosis of the power supply system fuel.
  • This diagnosis is made according to surveillance strategies of the fuel system pressure (monitoring the rise time in pressure after ignition, maintenance of fuel pressure after an engine stop phase, constant pressure or maintained in a predetermined range).
  • This diagnostic function can also be used alone; however preferably the fuel system pressure information from the pressure sensor 30 is also used to control the fuel pump 10 and allow energy savings electric as previously indicated.
  • This architecture allows not only a gain on the number of sensors used, but it allows also by integrating the fuel pump control function 10 in the engine control system 60, to decrease the cost of the system complete (one control electronics 60, one source information), and obtain more comprehensive control strategies (additional corrections possible thanks to new information) and simpler diagnosis (reaction recognized following a request from the control function).
  • Use of information from the pressure sensor 30 diagnoses the fuel system by the engine control system (leaks on injection components 14, good components).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP95933465A 1994-10-03 1995-10-02 Dispositif d'alimentation en carburant pour vehicule automobile avec regulation de pression Expired - Lifetime EP0784749B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9411783 1994-10-03
FR9411783A FR2725244B1 (fr) 1994-10-03 1994-10-03 Dispositif d'alimentation en carburant pour vehicule automobile avec regulation de pression
FR9502624 1995-03-07
FR9502624A FR2725245B1 (fr) 1994-10-03 1995-03-07 Dispositif d'alimentation en carburant pour vehicule automobile avec regulation de pression
PCT/FR1995/001275 WO1996010693A1 (fr) 1994-10-03 1995-10-02 Dispositif d'alimentation en carburant pour vehicule automobile avec regulation de pression

Publications (2)

Publication Number Publication Date
EP0784749A1 EP0784749A1 (fr) 1997-07-23
EP0784749B1 true EP0784749B1 (fr) 1999-01-13

Family

ID=26231441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95933465A Expired - Lifetime EP0784749B1 (fr) 1994-10-03 1995-10-02 Dispositif d'alimentation en carburant pour vehicule automobile avec regulation de pression

Country Status (7)

Country Link
EP (1) EP0784749B1 (ja)
JP (1) JP3816519B2 (ja)
BR (1) BR9509228A (ja)
DE (1) DE69507318T2 (ja)
ES (1) ES2126935T3 (ja)
FR (1) FR2725245B1 (ja)
WO (1) WO1996010693A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6729307B2 (en) 2002-01-28 2004-05-04 Visteon Global Technologies, Inc. Bypass/leakage cooling of electric pump

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510494A1 (de) * 1995-03-23 1996-09-26 Pierburg Gmbh Brennstoffversorgungssystem für Brennkraftmaschinen
US5961293A (en) * 1995-05-19 1999-10-05 Uis, Inc In-take fuel pump assembly with unitary control unit for internal combustion engines
DE10355804A1 (de) 2003-11-28 2005-06-30 Robert Bosch Gmbh Vorrichtung zum Fördern von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine und Verfahren zur Druckerfassung
FR2949812B1 (fr) 2009-09-10 2012-03-30 Peugeot Citroen Automobiles Sa Dispositif et procede de regulation de l'injection d'une quantite de reducteur en phase gaz
FR2950651A1 (fr) 2009-09-29 2011-04-01 Peugeot Citroen Automobiles Sa Dispositif d'injection dans une ligne d'echappement d'un agent reducteur gazeux
FR2957970B1 (fr) 2010-03-29 2013-01-11 Peugeot Citroen Automobiles Sa Dispositif d'injection dans une ligne d'echappement d'un agent reducteur gazeux
DE102011081965A1 (de) * 2011-09-01 2013-03-07 Robert Bosch Gmbh Positionierung eines Druckreglers in einem Kraftstoffversorgungs-System mit einer bürstenlos betriebenen Kraftstoffpumpe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4728264A (en) * 1986-10-10 1988-03-01 Walbro Corporation Fuel delivery system with pressure-controlled electric pump
US5337718A (en) * 1992-06-02 1994-08-16 Walbro Corporation Electronic fuel injection system with heat-pressure response
US5265644A (en) * 1992-06-02 1993-11-30 Walbro Corporation Fuel pressure regulator
FR2692937B1 (fr) * 1992-06-30 1995-07-07 Renault Systeme d'injection de carburant pour un moteur a combustion interne.
FR2695964B1 (fr) * 1992-09-24 1995-07-21 Walbro Corp Circuit de distribution de carburant pour moteur a combustion interne.
FR2700584B1 (fr) * 1993-01-19 1995-02-24 Renault Dispositif de sécurité pour circuit à carburant de moteur à combustion interne.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6729307B2 (en) 2002-01-28 2004-05-04 Visteon Global Technologies, Inc. Bypass/leakage cooling of electric pump

Also Published As

Publication number Publication date
JP3816519B2 (ja) 2006-08-30
FR2725245B1 (fr) 1996-12-20
DE69507318T2 (de) 1999-06-17
BR9509228A (pt) 1998-01-27
DE69507318D1 (de) 1999-02-25
EP0784749A1 (fr) 1997-07-23
WO1996010693A1 (fr) 1996-04-11
ES2126935T3 (es) 1999-04-01
FR2725245A1 (fr) 1996-04-05
JPH10511158A (ja) 1998-10-27

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