EP2205852B1 - Procédé de commande d'un moteur à combustion avec un injecteur à combustible - Google Patents

Procédé de commande d'un moteur à combustion avec un injecteur à combustible Download PDF

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Publication number
EP2205852B1
EP2205852B1 EP08804376A EP08804376A EP2205852B1 EP 2205852 B1 EP2205852 B1 EP 2205852B1 EP 08804376 A EP08804376 A EP 08804376A EP 08804376 A EP08804376 A EP 08804376A EP 2205852 B1 EP2205852 B1 EP 2205852B1
Authority
EP
European Patent Office
Prior art keywords
pressure
fuel
injection valve
injection
chamber
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.)
Not-in-force
Application number
EP08804376A
Other languages
German (de)
English (en)
Other versions
EP2205852A2 (fr
Inventor
Andreas Rau
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 EP2205852A2 publication Critical patent/EP2205852A2/fr
Application granted granted Critical
Publication of EP2205852B1 publication Critical patent/EP2205852B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • 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
    • 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
    • F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
    • 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
    • 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

Definitions

  • the invention relates to a method for operating an internal combustion engine having a fuel injection valve according to the preamble of claim 1.
  • a fuel injection valve in which an actuator via a pressure chamber in hydraulic operative connection with an injection valve member, which is also referred to as a nozzle needle.
  • a control valve which controls the pressure in a control chamber by pressure relief to the low pressure area in otherwise conventional manner is not provided in this embodiment.
  • the from the DE 103 52 736 Known type of operation of the nozzle needle is referred to as a direct needle control.
  • fuel injection valves with direct needle control are off DE 10 2006 036 444 A1 and DE 103 52 736 A1 known.
  • a driving method for driving a piezoelectric actuator of a fuel injection valve is known.
  • it is proposed to reduce the voltage applied to the actuator between two injections.
  • the gradient of the voltage change (dU / dt) is so small that the change in length of the actuator is compensated by leakage at the piston.
  • the reduced voltage must therefore be increased relatively early before the next injection cycle, so that at a given maximum permissible gradient of the voltage change (dU / dt) at the right time the voltage level required to achieve an injection is reached.
  • the method according to the invention with the characterizing features of claim 1 has the advantage that the increase in pressure associated with the rise of the voltage in the pressure chamber, which can not be compensated by leakage because of the high gradient of the voltage change dU / dt, because of the Druckbastungsventils not to an inadmissible high pressure rise in the pressure chamber leads.
  • This makes it possible to reduce the voltage level between two injections in quick succession, for example, between a main injection and a post-injection, so as to additionally protect the piezoelectric actuator.
  • fuel injection valve 1 after FIG. 1 First, fuel from a fuel tank 2 by means of a high pressure pump 3 via a high pressure line 4 in a high-pressure fuel storage 5.
  • terminals 6 are arranged, each leading to a cylinder of the internal combustion engine.
  • Each of the terminals 6 is connected via a fuel supply line 7 with a fuel injection valve 1 designed according to the invention.
  • the fuel injection valve 1 comprises a piston 8 designed as a piston, which is guided in a coupler housing 9, and an injection valve member 10, which may also be referred to as a nozzle needle.
  • the injection valve member 10 is divided in a preferred embodiment of the fuel injection valve 1 into a translator section 11, a guide section 12 and a needle section 13.
  • the piston 8, the coupler housing 9 and the injection valve member 10 are accommodated in a housing.
  • the housing is divided into an injector housing part 14 and a nozzle housing part 15.
  • the connection of the Injektorgepuruseteils 14 and the nozzle housing part 15 is preferably carried out non-positively by means of a nozzle clamping nut, not shown here.
  • the fuel injection valve 1 comprises at least one injection opening 16, which can be closed by the needle portion 13 of the injection valve member 10.
  • the needle section 13 of the injection valve member 10 is placed on a seat 17 arranged above the injection opening 16.
  • An axial movement for opening and closing the at least one injection opening 16 is ensured by the fact that the injection valve member 10 is guided with its guide portion 12 in a needle guide 18 arranged in the nozzle housing part 15.
  • the translator section 11 of the injection valve member 10 is enclosed by a sleeve 19.
  • the sleeve 19 serves as a lateral boundary of a pressure chamber 20.
  • the sleeve 19 is provided with a sealing edge 21 against a serving as a sealing seat paragraph 22 of the coupler housing 9 or as in Fig.
  • the pressure chamber 20 is divided into a coupler space 20a and a control chamber 20b, wherein the piston 8, the coupler space 20a and the translator section 11 limit the control chamber 20b.
  • a spring element 24 is supported.
  • the spring element 24 is annular and surrounds the translator portion 11 of the injection valve member 10.
  • spring elements 24 are, for example, coil springs, coil springs or other known in the art, annularly shaped spring elements. With its other side, the spring element 24 is supported against a ring 25, which is preferably arranged in a recess 26 which is located between the translator section 11 and the guide section 12 of the injection valve member 10
  • the coupler housing 9 is surrounded by a second spring element 27 which is supported with one side on a step 28 on the coupler housing 9 and with its other side on a ring 29 which rests against a step 30 on the piston 8.
  • the step 28 serves at the same time as a guide of the coupler housing 9 in the injector housing part 14.
  • the spring element 27 is accommodated in a first spring chamber 32, which is arranged between the coupler housing 9 and the inner wall 33 of the injector housing part 14.
  • at least one groove 34 which is preferably axially aligned, is received.
  • the first spring chamber 32 with a the translator section 11 of the injection valve member 10 surrounding the second spring chamber 39 in hydraulic communication.
  • the at least one groove 34 and the grooves 35 in paragraph 31 of the nozzle housing part 15 are preferably aligned so that their positions coincide radially and axially.
  • the second spring chamber 39 is connected via at least one channel, which is formed between at least one bevel 40 in the guide portion 12 of the injection valve member 10 and the needle guide 18, in hydraulic communication with a nozzle chamber 41st
  • actuator which acts on an upper end face 42 of the piston 8.
  • a piezoelectric actuator 43 is preferably used. But there are also electromagnet or hydraulic / mechanical actuator.
  • the operation of the fuel injection valve 1 takes place hydraulically with fuel under system pressure.
  • the fuel is provided by the high-pressure fuel storage 5.
  • the fuel flows into an annular space 44, which surrounds the piezoelectric actuator 43.
  • the fuel under system pressure passes into the first spring chamber 32.
  • the fuel flows into the second spring chamber 39. From there, the fuel passes along the at least one bevel 40 in the nozzle chamber 41.
  • the piezoelectric actuator 43 For injecting fuel into the combustion chamber 52 of the internal combustion engine, the piezoelectric actuator 43 is discharged and the voltage U applied to the piezoelectric actuator 43 is lowered. As a result, the piezocrystals contract and the piezoactuator 43 contracts. Supported by the force exerted by the spring element 27 spring force, the piston 8 moves in the with the arrow 46 marked direction of movement. As a result, the lower end face 47 of the piston 8 moves out of the pressure chamber 20, which increases its volume. Due to the increasing volume of the pressure chamber 20, the pressure in the pressure chamber 20 decreases. Since the pressure in the pressure chamber 20 in this case drops below the system pressure, it is necessary that the connection between the sleeve 19 and the shoulder 22 in the coupler housing 9 is pressure-tight. The filling of the pressure chamber 20 takes place by guide leakage between the coupler housing 9 and the piston 8 and between the inside 43 of the sleeve 19 and the translator section 11 of the injection valve member 10th
  • the piezoelectric actuator 43 For closing the at least one injection opening 16, the piezoelectric actuator 43 is energized again. The piezocrystals thereby expand and the piezoactuator 43 lengthens. As a result, the piston 8 again moves against the direction of movement indicated by the arrow 46 into the pressure chamber 20, whereby the volume of the pressure chamber 20 is reduced. This in turn increases the pressure in the pressure chamber 20 and thus the force acting on the end face 48 of the translator portion 11 of the injection valve member 10 hydraulic force.
  • the injection valve member 10 moves in the direction the at least one injection opening 16 and is placed on the seat 17. As a result, the at least one injection opening 16 is closed and the injection process into the combustion chamber 52 is terminated.
  • the sleeve 19 is designed such that a pressure application surface 55 is formed on it, acts on the pressure prevailing in the pressure chamber 20 pressure and exerts a counter to the spring 24 directed force.
  • the pressure application surface 55 is formed by a chamfer, which is arranged on the pressure chamber side on the inside of the sleeve 19.
  • the force of the spring 24 and the size of the pressure stage are dimensioned so that a pressure relief valve 56 is formed, which opens at pressure above system pressure in the pressure chamber 20 to the high-pressure fuel area out by the sealing edge 21 upon reaching the opening pressure of paragraph 31 against the force the spring 24 lifts and releases a gap to the high pressure area behind it. In this way, an overpressure in the pressure chamber 20 is avoided.
  • FIG. 2 a second embodiment of the invention is shown, which differs from the first embodiment in that between the coupler chamber 20a and the control chamber 20b, a throttle 57 is arranged.
  • FIG. 3 shows a third embodiment of the invention, in which the pressure relief valve 56 is arranged in the coupler space 20b.
  • a sleeve 19a is guided for this purpose, which is acted upon by a spring element 24a in a closed position.
  • a sealing edge 21a is formed, which cooperates with a corresponding sealing seat.
  • Coupler space side is formed on the sleeve 19a, a pressure application surface 55a in the form of a chamfer.
  • the pressure application surface 55a and the spring element 24a are dimensioned so that the pressure relief valve 56 opens at a fuel pressure above the fuel inlet pressure, so that a pressure reduction takes place to the fuel inlet channel 7 out.
  • the injection valve member 10 could be made in several parts and the translator section 11 could be connected to a push rod which actuates the injection valve member 10.
  • the pressure relief valve 56 may also be formed by a conventional pressure relief valve of known type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (1)

  1. Procédé pour faire fonctionner un moteur à combustion interne avec une soupape d'injection de carburant (1), qui comprend un actionneur (43), qui est en liaison fonctionnelle hydraulique par le biais d'un piston (8) et d'un espace de pression (20) avec un organe de soupape d'injection (10) et qui est sollicité par une tension électrique, qui détermine la position du piston (8), la tension électrique étant accrue juste avant le début d'une injection, caractérisé en ce qu'une augmentation de pression dans l'espace de pression (20) se produisant suite à l'augmentation de tension est diminuée à l'aide d'une soupape de détente de la pression (56) vers un canal d'alimentation en carburant (7).
EP08804376A 2007-10-29 2008-09-18 Procédé de commande d'un moteur à combustion avec un injecteur à combustible Not-in-force EP2205852B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007051554A DE102007051554A1 (de) 2007-10-29 2007-10-29 Kraftstoffeinspritzventil für eine Brennkraftmaschine
PCT/EP2008/062436 WO2009056395A2 (fr) 2007-10-29 2008-09-18 Injecteur de carburant pour moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2205852A2 EP2205852A2 (fr) 2010-07-14
EP2205852B1 true EP2205852B1 (fr) 2011-08-03

Family

ID=40490281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08804376A Not-in-force EP2205852B1 (fr) 2007-10-29 2008-09-18 Procédé de commande d'un moteur à combustion avec un injecteur à combustible

Country Status (4)

Country Link
EP (1) EP2205852B1 (fr)
AT (1) ATE519032T1 (fr)
DE (1) DE102007051554A1 (fr)
WO (1) WO2009056395A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012212614A1 (de) 2012-07-18 2014-01-23 Continental Automotive Gmbh Piezoinjektor mit hydraulisch gekoppelter Düsennadelbewegung
DE102012222509A1 (de) 2012-12-07 2014-06-12 Continental Automotive Gmbh Piezoinjektor
DE102012223934B4 (de) 2012-12-20 2015-10-15 Continental Automotive Gmbh Piezoinjektor
GB201420017D0 (en) * 2014-11-11 2014-12-24 Delphi International Operations Luxembourg S.�.R.L. Hydraulic lash adjuster arrangement ina servo injector
CN114151240A (zh) * 2021-11-19 2022-03-08 哈尔滨工程大学 单体泵控制式多阀氨燃料喷射系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352736A1 (de) 2003-11-12 2005-07-07 Robert Bosch Gmbh Kraftstoffinjektor mit direkter Nadeleinspritzung
DE102005032841B4 (de) 2005-07-14 2017-06-14 Robert Bosch Gmbh Ziehender Betrieb eines Einspritzventils mit Spannungsabsenkung zwischen Einspritzungen
DE102005059169A1 (de) * 2005-12-12 2007-06-14 Robert Bosch Gmbh Kraftstoffinjektor mit direkt betätigbarem Einspritzventilglied
DE102006036444A1 (de) * 2006-03-30 2007-10-04 Robert Bosch Gmbh Kraftstoffinjektor

Also Published As

Publication number Publication date
WO2009056395A2 (fr) 2009-05-07
EP2205852A2 (fr) 2010-07-14
ATE519032T1 (de) 2011-08-15
DE102007051554A1 (de) 2009-04-30
WO2009056395A3 (fr) 2009-06-18

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