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EP1317619A1 - Common rail system - Google Patents

Common rail system

Info

Publication number
EP1317619A1
EP1317619A1 EP01971670A EP01971670A EP1317619A1 EP 1317619 A1 EP1317619 A1 EP 1317619A1 EP 01971670 A EP01971670 A EP 01971670A EP 01971670 A EP01971670 A EP 01971670A EP 1317619 A1 EP1317619 A1 EP 1317619A1
Authority
EP
European Patent Office
Prior art keywords
valve
common rail
pressure
fluid
controlled
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
EP01971670A
Other languages
German (de)
French (fr)
Other versions
EP1317619B1 (en
Inventor
Friedrich Boecking
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1317619A1 publication Critical patent/EP1317619A1/en
Application granted granted Critical
Publication of EP1317619B1 publication Critical patent/EP1317619B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
    • F02D41/3872—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves characterised by leakage flow in injectors
    • 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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F02M2200/244—Force sensors
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F02M2200/247—Pressure sensors
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. for compensating clearance or thermal expansion

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Fluid-Driven Valves (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

Disclosed is a valve which is used to control a fluid, comprising an actuator unit (7) which is used to actuate an axially displaceable valve member (6) with an associated valve closing member (15), cooperating with a valve seat (23) in order to open and close the valve (1) and separating a high pressure area (3) from the valve (1). The fluid to be controlled is located in the high pressure area (3) at a working pressure (p-R). Said working pressure (p-R) and an over pressure occurring in specific circumstances are recorded by the actuator unit (7) which is embodied as a force measuring sensor.Said valve (1) is especially used as a pressure limiting valve in a common rail system.

Claims

- 11 -Patentansprüche - 11 patent claims
1. Common-Rail -System mit einem Common-Rail -Druckspeicher (5) und mehreren über jeweils ein Steuerventil (1) ansteuerbaren Einspritzeinrichtungen (2) , dadurch gekennzeichnet, daß wenigstens eines der Steuerventile (1) gleichzeitig als Druckbegrenzungsventil für den Common- Rail-Druckspeicher (5) ausgebildet ist.1. Common rail system with a common rail pressure accumulator (5) and several injectors (2) which can be controlled via a control valve (1), characterized in that at least one of the control valves (1) simultaneously as a pressure relief valve for the common Rail pressure accumulator (5) is formed.
2. Common-Rail -System nach Anspruch 1, dadurch gekennzeichnet, daß das Steuerventil (1) von einem Steuergerät (28) derart ansteuerbar ist-, daß es bei Erkennen eines Über- druckes in dem Common-Rail-Druckspeicher (5) so lange geöffnet bleibt, bis der Überdruck über das Steuerventil (1) abgebaut ist, ohne daß dabei eine Düsennadel (26) der Einspritzeinrichtung (2) angesteuert ist.2. Common rail system according to claim 1, characterized in that the control valve (1) can be controlled by a control unit (28) in such a way that it detects overpressure in the common rail pressure accumulator (5) remains open for a long time until the excess pressure is released via the control valve (1) without a nozzle needle (26) of the injection device (2) being activated.
3. Ventil, insbesondere als Steuerventil in einem Common- Rail-System nach dem Anspruch 1 oder 2, zum Ansteuern eines Fluids mit einer Aktuator-Einheit (7) zur Betätigung eines axial verschiebbaren Ventilglieds (6) , dem ein Ventilschließglied (15) zugeordnet ist, das zum Öff- nen und Schließen des Ventils (1) mit einem Ventilsitz (23) zusammenwirkt und das einen Hochdruckbereich (3) von dem Ventil (1) trennt, in dem sich das anzusteuernde Fluid unter einem Hochdruck (p_R) befindet, dadurch ge- - 12 -3. Valve, in particular as a control valve in a common rail system according to claim 1 or 2, for controlling a fluid with an actuator unit (7) for actuating an axially displaceable valve member (6) to which a valve closing member (15) is assigned which cooperates with a valve seat (23) to open and close the valve (1) and which separates a high-pressure region (3) from the valve (1) in which the fluid to be controlled is at a high pressure (p_R), thereby - 12 -
kennzeichnet, daß zur Messung des anstehenden Hochdrucks (p_R) die Aktuator-Einheit (7) gleichzeitig als Krraft- meßsensor ausgebildet ist und in Abhängigkeit der detek- tierten, auf diese einwirkenden Kraft ansteuerbar ist.indicates that for the measurement of the high pressure (p_R), the actuator unit (7) is simultaneously designed as a force measurement sensor and can be controlled as a function of the detected force acting on it.
4. Ventil nach Anspruch 3, dadurch gekennzeichnet, daß die Aktuator-Einheit (7) als piezoelektrische Einheit ausgebildet ist.4. Valve according to claim 3, characterized in that the actuator unit (7) is designed as a piezoelectric unit.
5. Ventil nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß das Ventilglied (6) mit einer Dichtfeder (27) gekoppelt ist, die das Ventilschließglied (15) unter einer bestimmten Dichtkraft gegen den Ventilsitz (23) drückt.5. Valve according to claim 3 or 4, characterized in that the valve member (6) is coupled to a sealing spring (27) which presses the valve closing member (15) under a certain sealing force against the valve seat (23).
6. Ventil nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß das Ventilschließglied (15) in einem Niederdruckbereich (24) angeordnet ist, in dem sich das Fluid bei geschlossenem Ventil (1) unter einem Niederdruck befindet .6. Valve according to one of claims 3 to 5, characterized in that the valve closing member (15) is arranged in a low pressure region (24) in which the fluid is at a low pressure when the valve (1) is closed.
7. Ventil nach Anspruch 6, dadurch gekennzeichnet, daß der Niederdruckbereich (24) mit einem Leckageausgleichkanal (25) verbunden ist.7. Valve according to claim 6, characterized in that the low pressure region (24) is connected to a leakage compensation duct (25).
8. Ventil nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, daß das Ventilglied (6) eine hydraulische Übersetzungseinrichtung (13) aufweist.8. Valve according to one of claims 3 to 7, characterized in that the valve member (6) has a hydraulic transmission device (13).
9. Ventil nach Anspruch 8, dadurch gekennzeichnet, daß die hydraulische Übersetzungseinrichtung (13) so ausgebildet ist, daß das Ventilglied (6) entgegen einer Auslenkungs- richtung der piezoelektrischen Einheit (7) verschiebbar ist. - 13 -9. Valve according to claim 8, characterized in that the hydraulic transmission device (13) is designed such that the valve member (6) against a deflection direction of the piezoelectric unit (7) is displaceable. - 13 -
10. Ventil nach Anspruch 9, dadurch gekennzeichnet, daß die hydraulische Übersetzungseinrichtung (13) einen ersten Kolben (12) aufweist, in dem ein zweiter Kolben (14) des Ventilglieds (6) derart geführt ist, daß zu beiden Seiten des zweiten Kolbens (14) jeweils eine Hydraulikkammer (18) und (19) angeordnet ist. 10. Valve according to claim 9, characterized in that the hydraulic transmission device (13) has a first piston (12) in which a second piston (14) of the valve member (6) is guided such that on both sides of the second piston ( 14) a hydraulic chamber (18) and (19) is arranged.
EP01971670A 2000-09-07 2001-08-29 Common rail system Expired - Lifetime EP1317619B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10044120 2000-09-07
DE10044120A DE10044120A1 (en) 2000-09-07 2000-09-07 Common Rail System
PCT/DE2001/003303 WO2002020976A1 (en) 2000-09-07 2001-08-29 Common rail system

Publications (2)

Publication Number Publication Date
EP1317619A1 true EP1317619A1 (en) 2003-06-11
EP1317619B1 EP1317619B1 (en) 2006-03-29

Family

ID=7655321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01971670A Expired - Lifetime EP1317619B1 (en) 2000-09-07 2001-08-29 Common rail system

Country Status (6)

Country Link
EP (1) EP1317619B1 (en)
JP (1) JP2004508494A (en)
AT (1) ATE321945T1 (en)
CZ (1) CZ20021537A3 (en)
DE (2) DE10044120A1 (en)
WO (1) WO2002020976A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10216154A1 (en) * 2002-04-12 2003-10-23 Hydraulik Ring Gmbh Pressure relief valve, in particular for high-pressure diesel pumps for injectors in motor vehicles
DE10307816A1 (en) * 2003-02-24 2004-09-02 Robert Bosch Gmbh Fuel injector
DE10333695A1 (en) * 2003-07-24 2005-03-03 Robert Bosch Gmbh Fuel injector
DE10333696A1 (en) * 2003-07-24 2005-02-24 Robert Bosch Gmbh Fuel injector
DE10333697A1 (en) * 2003-07-24 2005-02-24 Robert Bosch Gmbh Fuel injector
DE10358864A1 (en) * 2003-12-16 2005-07-14 Volkswagen Ag Fuel supply device for an internal combustion engine and method for operating this
DE102007017126A1 (en) * 2007-04-11 2008-10-16 Robert Bosch Gmbh Injection Module
DE102008040629A1 (en) * 2008-07-23 2010-01-28 Robert Bosch Gmbh Method for controlling a fuel injector in the event of overpressure or failure and associated injection system
DE102012204252B3 (en) 2012-03-19 2013-08-29 Continental Automotive Gmbh Method for operating a pressure-reducing fuel-injection system and fuel-injection system with servo-valve
DE102015205114B4 (en) 2015-03-20 2022-08-04 Volkswagen Aktiengesellschaft Procedure for avoiding excessive system pressures in common rail systems

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
ATE192263T1 (en) 1990-09-25 2000-05-15 Siemens Ag ARRANGEMENT FOR AN ADAPTIVE, MECHANICAL TOLERANCE COMPENSATION FOR THE DISTANCE TRANSFORMER OF A PIEZOELECTRIC ACTUATOR, ACTING IN THE STROKE DIRECTION
JP3740733B2 (en) * 1996-02-13 2006-02-01 いすゞ自動車株式会社 Fuel injection device for internal combustion engine
GB9610819D0 (en) * 1996-05-22 1996-07-31 Lucas Ind Plc Valve arrangement
DE29708369U1 (en) * 1997-05-09 1997-07-10 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Controllable injection valve for fuel injection on internal combustion engines
JP2000027725A (en) * 1998-07-08 2000-01-25 Isuzu Motors Ltd Common rail type fuel injection device
DE19954023B4 (en) * 1998-11-30 2009-02-26 Denso Corp., Kariya-shi High-pressure fuel injection device
DE19917711C2 (en) * 1999-04-20 2001-06-07 Bosch Gmbh Robert Method and device for controlling an internal combustion engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0220976A1 *

Also Published As

Publication number Publication date
DE50109392D1 (en) 2006-05-18
EP1317619B1 (en) 2006-03-29
WO2002020976A1 (en) 2002-03-14
DE10044120A1 (en) 2002-04-04
ATE321945T1 (en) 2006-04-15
JP2004508494A (en) 2004-03-18
CZ20021537A3 (en) 2003-10-15

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