WO2015169467A1 - Système d'injection et procédé de fonctionnement d'un système d'injection - Google Patents

Système d'injection et procédé de fonctionnement d'un système d'injection Download PDF

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Publication number
WO2015169467A1
WO2015169467A1 PCT/EP2015/054399 EP2015054399W WO2015169467A1 WO 2015169467 A1 WO2015169467 A1 WO 2015169467A1 EP 2015054399 W EP2015054399 W EP 2015054399W WO 2015169467 A1 WO2015169467 A1 WO 2015169467A1
Authority
WO
WIPO (PCT)
Prior art keywords
injector
piston pump
control
injection system
control unit
Prior art date
Application number
PCT/EP2015/054399
Other languages
German (de)
English (en)
Inventor
Siamend Flo
Frank Nitsche
Willi Strohl
Thorsten Allgeier
Juergen Koreck
Walter Maeurer
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
Priority to CN201580023120.6A priority Critical patent/CN106460745A/zh
Publication of WO2015169467A1 publication Critical patent/WO2015169467A1/fr

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
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/04—Fuel pressure pulsation in common rails
    • 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
    • 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

Definitions

  • the present invention relates to an injection system for a vehicle, in particular a motorcycle, and a method for operating such an injection system.
  • Injection systems for two-wheelers usually have to be very robust and compact.
  • the injector is usually controlled by an engine control unit, which depending on an engine operating state
  • Fuel injection makes.
  • the piston pump is usually operated at a constant frequency to provide a necessary injection pressure at the injector. It has now been determined that it is in operation too
  • Pressure pulsations may come at the injector inlet, causing a
  • the injection system according to the invention with the features of claim 1 has the advantage that an undesirable
  • a control device for this purpose, which is set up to control a piston pump, which conveys the fuel to the injector, as a function of a triggering of the injector.
  • a targeted control of the piston pump which is adapted to a control of the injector, so that undesirable
  • control unit is set up, the piston pump relative to an actuation time point relative to an actuation time of the injector and / or with respect to an actuation frequency relative to a
  • the timing and frequency of the piston pump can be adjusted to the control of the injector and be adapted to these changed injection cycles by changing the timing and / or the frequency with changed operating conditions and thus changed injection cycles.
  • control unit is set up to control the piston pump and the injector synchronously.
  • a separate control unit can be provided for the piston pump and the injector is driven, for example, by means of a known engine control unit.
  • control unit is adapted to control the piston pump to perform a suction stroke while the injector is driven to make an injection.
  • control unit is set up, the injector and the
  • Control unit configured, the injector and the piston pump so
  • control unit is set up to control the piston pump as a function of activation of the injector in such a way that a maximum pressure difference in a region of the injection system takes place before the injection Injector is not greater than 2 x 10 5 Pa. This is 50% less than in the prior art, whereby a significant reduction of noise and reduced deviations are obtained from a desired injection quantity.
  • the present invention relates to a method for operating an injection system with an injector and a piston pump for delivering fuel to the injector, wherein a coordinated control of the piston pump takes place to control the injector.
  • a common control device is provided to control injector and piston pump.
  • the piston pump and injector are controlled in such a way that fuel is delivered while an injection is still being carried out by the injector.
  • a control of the piston pump can also be such that a delivery by the piston pump takes place immediately after completion of an injection process.
  • the present invention relates to a vehicle, in particular a motorcycle, comprising an injection system according to the invention.
  • the piston pump and the injector are driven and operated at the same frequency.
  • the piston pump is dimensioned smaller for reasons of smaller space or for energy reasons, so that a single promotion of the fuel does not cover the injection quantity of the fuel at the injector, the piston pump must be operated at a higher frequency.
  • the piston pump is preferably driven at a multiple of the injector frequency in order to partially maintain the advantages of a synchronous injection.
  • operating point dependent increase in the pumping frequency may be required as a multiple of the injector frequency, e.g. in cold start with mixture enrichment, or a temporary fuel enrichment in the dynamic case to compensate for the fuel wall film in the intake manifold.
  • FIG. 1 shows a schematic view of an injection system according to an embodiment of the invention
  • Figure 2 is a diagram illustrating a control of a piston pump and an injector over time, with the corresponding pressure differences in the diagram
  • Figure 3 shows an alternative diagram, which is a control of a
  • Figure 4 is a diagram showing a drive of piston pump and injector according to the prior art.
  • the injection system 1 comprises an injector 2 and a piston pump 3.
  • the piston pump 3 is connected to the injector 2 via a pressure line 7.
  • the piston pump 3 is shown only schematically in FIG. 1 and comprises a piston 30 which can be reciprocated in a cylinder 34 (double arrow A), a delivery chamber 31, an inlet valve 32 and an outlet valve 33.
  • the pressure line 7 is in the flow direction of the fuel the exhaust valve 33 is arranged.
  • the reference numeral 8 denotes a fuel supply line, via which fuel can be sucked through an open inlet valve 32 into the delivery chamber 31 in a known manner (arrow C).
  • the piston pump 3 is actuated by means of a first actuator 4.
  • a second actuator 5 is provided for actuating the injector 2.
  • the first actuator 4 of the piston pump is connected to a control unit 6.
  • the second actuator 5 of the injector is also with the
  • Control unit 6 connected.
  • the common control unit 6 is set up to control the injector 2 and the piston pump 3 by activating the actuators 4, 5. Actuation of the actuator 5 of the injector 2 is effected in dependence on an operating state of an internal combustion engine and an operating state desired by a driver, for example when this gas is present.
  • the control unit 6 is now set up to synchronize a control of the piston pump 3 with respect to a control of the injector 2. As a result, the piston pump 3 is activated as a function of activation of the injector 2.
  • FIGS. 2 and 3 show the timing of the piston pump 3 as a function of a triggering of the injector 2.
  • Figure 2 shows an optimal timing with lowest pulsations and uniformly recurring course
  • Figure 3 shows a synchronous operation with unfavorable timing with higher pulsations, but still uniformly recurring course.
  • FIG. 2 shows a control of the piston pump 3 and the injector 2 over the time t in seconds (s).
  • the dashed line I indicates the
  • Termination of a control of the injector 2 is a suction stroke.
  • the injection by the injector 2 is stopped before the suction stroke is completed.
  • Piston pump 3 over the time t and the control of the injector 2 each constant.
  • a pressure level of the fuel in the pressure line 7 is in a range B of about 2.2 to 4.2 x 10 5 Pa.
  • a recurrent pressure fluctuation within this bandwidth B can be achieved over the time t.
  • FIG. 3 shows an alternative control according to the invention of the piston pump 3 as a function of activation of the injector 2.
  • the piston pump 3 is always actuated by the control unit 6, even if the injector 2 is actuated, that is to say if one
  • a synchronous activation of piston pump 3 and injector 2 is thus carried out, so that significant reduced pressure fluctuations in the region upstream of the injector 2 are obtained.
  • the control of injector 2 and piston pump 3 can be effected by a common control unit 6 or alternatively by two separate control units, which are e.g. connected via a bus system.

Landscapes

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

Abstract

L'invention concerne un système d'injection, comprenant un injecteur (2), une pompe à piston (3) pour alimenter en carburant l'injecteur (2), la pompe à piston (3) comprenant un premier actionneur (4) pour actionner un piston (30), et une unité de commande (6) qui est adaptée pour commander la pompe à piston (3) en réponse à une activation de l'injecteur (2).
PCT/EP2015/054399 2014-05-07 2015-03-03 Système d'injection et procédé de fonctionnement d'un système d'injection WO2015169467A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201580023120.6A CN106460745A (zh) 2014-05-07 2015-03-03 喷射系统以及用于运行喷射系统的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014208558.6 2014-05-07
DE102014208558.6A DE102014208558A1 (de) 2014-05-07 2014-05-07 Einsspritzsystem sowie Verfahren zum Betreiben eines Einsspritzsystems

Publications (1)

Publication Number Publication Date
WO2015169467A1 true WO2015169467A1 (fr) 2015-11-12

Family

ID=52598762

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/054399 WO2015169467A1 (fr) 2014-05-07 2015-03-03 Système d'injection et procédé de fonctionnement d'un système d'injection

Country Status (3)

Country Link
CN (1) CN106460745A (fr)
DE (1) DE102014208558A1 (fr)
WO (1) WO2015169467A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0962650A2 (fr) * 1998-06-01 1999-12-08 Toyota Jidosha Kabushiki Kaisha Dispositif d'injection de combustible du type à accumulation et procédé de commande associé
DE19908678A1 (de) * 1999-02-26 2000-08-31 Bosch Gmbh Robert Steuerung einer Kraftstoff direkt-einspritzenden Brennkraftmaschine eines Kraftfahrzeugs insbesondere im Startbetrieb
EP1188919A2 (fr) * 2000-09-18 2002-03-20 Hitachi, Ltd. Système d'alimentation en carburant
JP2003227390A (ja) * 2002-01-31 2003-08-15 Mitsubishi Motors Corp 筒内噴射型内燃機関
EP1382825A2 (fr) * 2002-07-17 2004-01-21 Keihin Corporation Système de commande d'une pompe à carburant à piston
JP2004340042A (ja) * 2003-05-16 2004-12-02 Keihin Corp 燃料ポンプを含む燃料噴射装置
EP1548262A1 (fr) * 2002-09-30 2005-06-29 Yanmar Co., Ltd. Detecteur de pression de carburant concu pour dispositif d'injection de carburant type rampe commune, et dispositif d'injection de carburant type rampe commune equipe d'un tel detecteur de pression de carburant
JP2009057860A (ja) * 2007-08-30 2009-03-19 Hitachi Ltd 内燃機関の制御装置及び内燃機関
EP2096288A1 (fr) * 2008-02-29 2009-09-02 Magneti Marelli S.p.A. Procédé de contrôle d'un système d'alimentation en carburant par injection électronique
JP2010229936A (ja) * 2009-03-27 2010-10-14 Toyota Motor Corp 高圧ポンプのカム角設定方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4603867B2 (ja) * 2004-12-07 2010-12-22 日立オートモティブシステムズ株式会社 可変容量式燃料ポンプの制御装置及び燃料供給システム
DE102005005547A1 (de) * 2005-02-07 2006-08-10 Robert Bosch Gmbh Verfahren, Computerprogramm und Steuergerät zum Ansteuern einer Pumpe-Düse-Einheit oder einer Pumpe-Leitung-Düse-Einheit
PT1911963E (pt) * 2006-10-10 2009-03-10 Magneti Marelli Spa Sistema de fornecimento de combustível por injecção electrónica

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0962650A2 (fr) * 1998-06-01 1999-12-08 Toyota Jidosha Kabushiki Kaisha Dispositif d'injection de combustible du type à accumulation et procédé de commande associé
DE19908678A1 (de) * 1999-02-26 2000-08-31 Bosch Gmbh Robert Steuerung einer Kraftstoff direkt-einspritzenden Brennkraftmaschine eines Kraftfahrzeugs insbesondere im Startbetrieb
EP1188919A2 (fr) * 2000-09-18 2002-03-20 Hitachi, Ltd. Système d'alimentation en carburant
JP2003227390A (ja) * 2002-01-31 2003-08-15 Mitsubishi Motors Corp 筒内噴射型内燃機関
EP1382825A2 (fr) * 2002-07-17 2004-01-21 Keihin Corporation Système de commande d'une pompe à carburant à piston
EP1548262A1 (fr) * 2002-09-30 2005-06-29 Yanmar Co., Ltd. Detecteur de pression de carburant concu pour dispositif d'injection de carburant type rampe commune, et dispositif d'injection de carburant type rampe commune equipe d'un tel detecteur de pression de carburant
JP2004340042A (ja) * 2003-05-16 2004-12-02 Keihin Corp 燃料ポンプを含む燃料噴射装置
JP2009057860A (ja) * 2007-08-30 2009-03-19 Hitachi Ltd 内燃機関の制御装置及び内燃機関
EP2096288A1 (fr) * 2008-02-29 2009-09-02 Magneti Marelli S.p.A. Procédé de contrôle d'un système d'alimentation en carburant par injection électronique
JP2010229936A (ja) * 2009-03-27 2010-10-14 Toyota Motor Corp 高圧ポンプのカム角設定方法

Also Published As

Publication number Publication date
CN106460745A (zh) 2017-02-22
DE102014208558A1 (de) 2015-11-12

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