EP3428445A1 - Procédé destiné au demarrage d'un moteur à combustion interne - Google Patents

Procédé destiné au demarrage d'un moteur à combustion interne Download PDF

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Publication number
EP3428445A1
EP3428445A1 EP18178192.3A EP18178192A EP3428445A1 EP 3428445 A1 EP3428445 A1 EP 3428445A1 EP 18178192 A EP18178192 A EP 18178192A EP 3428445 A1 EP3428445 A1 EP 3428445A1
Authority
EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
control unit
cylinder
decompression valve
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.)
Withdrawn
Application number
EP18178192.3A
Other languages
German (de)
English (en)
Inventor
Werner Kübler
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.)
MAN Truck and Bus SE
Original Assignee
MAN Truck and Bus SE
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 MAN Truck and Bus SE filed Critical MAN Truck and Bus SE
Publication of EP3428445A1 publication Critical patent/EP3428445A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • F02D41/3005—Details not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N9/00—Starting of engines by supplying auxiliary pressure fluid to their working chambers
    • F02N9/04—Starting of engines by supplying auxiliary pressure fluid to their working chambers the pressure fluid being generated otherwise, e.g. by compressing air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
    • F02D33/006—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge depending on engine operating conditions, e.g. start, stop or ambient conditions
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/004—Aiding engine start by using decompression means or variable valve actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2201/00—Electronic control systems; Apparatus or methods therefor
    • 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
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
    • F02N2200/022—Engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2300/00—Control related aspects of engine starting
    • F02N2300/10—Control related aspects of engine starting characterised by the control output, i.e. means or parameters used as a control output or target
    • F02N2300/102—Control of the starter motor speed; Control of the engine speed during cranking

Definitions

  • the invention relates to a method for starting an internal combustion engine according to the preamble of claim 1, an apparatus for carrying out the method according to the preamble of claim 10 and a vehicle for carrying out the method and / or with the apparatus according to claim 11.
  • a generally known internal combustion engine in particular a diesel internal combustion engine in a commercial vehicle or in a stationary system has at least one cylinder, usually a plurality of cylinders, a controllable starter, a controllable fuel injection device and a control unit.
  • a start operating element for example an ignition key
  • the control unit activates the starter and the fuel injection device.
  • the starter By activating the starter, the engine is driven with increasing engine speed and the engine starts.
  • a disadvantage of this well-known starting process is that the starter with relatively high starting torque must overcome the compression in the compression stroke of each cylinder to the engine start, so that the starter must be sized for a corresponding high performance.
  • Another disadvantage is that the simultaneous activation of the fuel injector during the starting process unburned fuel enters the exhaust system and leads to unfavorable high polluting emissions.
  • an internal combustion engine in particular a stationary internal combustion engine
  • a decompression lever with which mechanical input and / or exhaust valves can be opened mechanically during the starting process in order to suppress compression.
  • the decompressing lever is reversed, whereby the valves maintain their operational function and the internal combustion engine starts.
  • this measure is only feasible for a relatively low starting torque if a decompression lever is present on an internal combustion engine and is directly accessible, which is usually not the case in vehicles the case is.
  • the fuel injection device is also activated here already at the start of the starting process, so that here too polluting high emissions are generated during the starting process.
  • Object of the invention is in contrast to propose a method for starting an internal combustion engine and an apparatus for performing the method, in which a required starter torque and also polluting emissions are reliably and effectively reduced.
  • a method for starting an internal combustion engine wherein the internal combustion engine has at least one cylinder, a controllable starter and a controllable fuel injection device, wherein at least one cylinder, in particular each cylinder, the internal combustion engine at least one decompression valve to reduce the Operation of the internal combustion engine is assigned at a compression stroke compression takes place.
  • a defined starting rotational speed is or is predetermined in the control unit.
  • the at least one decompression valve is opened automatically controlled by means of a control unit, wherein the fuel injection device is not activated here.
  • the control unit detects the current, increasing speed of the internal combustion engine and closes when reaching the defined starting speed, the at least one decompression valve. In addition, then, in particular after closing the at least one decompression valve, the fuel injection device is activated, so that the internal combustion engine starts immediately and is started.
  • the starting method according to the invention runs automatically after actuation of a start operating element. Since during the starting process no counterforce developed by the compression of the starter has to be overcome, a comparatively low starter torque is required for the starting process.
  • the starter can be dimensioned with relatively low power and possibly small volume. Also the required Starting energy is advantageously comparatively low.
  • an electric starter is used, in principle, the method with other starter versions, for example, with a pneumatic or hydraulic starter feasible.
  • the fuel injection device is activated by the control unit only when the predetermined starting speed is reached, advantageously no polluting emissions arise during the starting process, so that the total emission of the internal combustion engine is advantageously reduced.
  • the above method is particularly suitable for multi-cylinder diesel engine, which are installed in particular as a drive motor in commercial vehicles.
  • start speed speeds between 100 U / min and 180 U / min are preferably suitable.
  • a starting speed can optionally be variably defined automatically in the control unit to different, detected boundary conditions, in particular to different environmental conditions, adapted.
  • an additional controllable valve in addition to the existing intake and exhaust valves, is preferably proposed for the respective cylinder.
  • an inlet and / or outlet valve which can be opened by the control unit in a further function as a decompression valve according to the method.
  • An additional decompression valve should preferably be designed as an electrically controllable solenoid valve.
  • the starter and the fuel injection device can also be controlled by the control unit to realize a simple structure.
  • the control unit for the starting process is at least partially integrated in a motor control unit, so that control technology for the inventive method then no additional costs.
  • an electric starter which is customary today on internal combustion engines can optionally be dispensed with and a starter generator, preferably a starter generator which can be operated with 48V, be used.
  • the starter generator should then be dimensioned so that it provides the required electrical power for at least one motor-associated electrical auxiliary consumer or ancillary unit, such as an electric water pump, during normal operation of the internal combustion engine.
  • the at least one electrically drivable auxiliary unit can be supplied with sufficient electrical drive energy by the starter generator.
  • the starter generator in particular with high gear ratio, integrated in the wheel drive of the internal combustion engine, whereby a drive belt for a belt drive can optionally be omitted.
  • the starter generator can then have a toothed wheel as a drive element which meshes with a toothed wheel of the gear drive.
  • At least one cylinder is proposed to use the associated decompression valve for a further function: in normal operation with the combustion function switched off, the decompression valve should be controllably openable, so that the associated cylinder-piston unit works as a pressure pump.
  • This can be promoted compressed air for compressed air powered equipment.
  • a device for conveying compressed air by means of a cylinder-piston unit and an actuated removal valve is already off AT 51 41 27 B1 2015-02-15 known.
  • the at least one decompression valve is associated with a cylinder head of the internal combustion engine to realize a simple and effective construction.
  • a device is further claimed, with an internal combustion engine having at least one cylinder, a controllable starter and a controllable fuel injection device, wherein at least one cylinder, in particular each cylinder, at least one decompression valve to reduce the Operation of the internal combustion engine associated with a compression stroke compression occurring.
  • a defined starting speed is predetermined in the control unit and / or that the at least one decompression valve is automatically controlled controlled by a control unit in a controlled activation of the starter, and that the control unit detects the current speed of the internal combustion engine and upon reaching the defined starting speed, the at least one decompression valve closes and activates the fuel injector.
  • a vehicle in particular a commercial vehicle, is claimed for carrying out the method according to the invention and / or with the device according to the invention.
  • the single figure represents a flowchart 1 of the starting method according to the invention, as it is realized for example for a multi-cylinder diesel engine in a commercial vehicle.
  • a driver in the driver's cab actuates a start control element for an engine start, for example with an ignition key.
  • a control unit is activated in accordance with status rectangle 3, which activates a starter generator for a motor drive.
  • the decompression valves of the individual cylinders are opened.
  • the fuel injector is not yet activated.
  • decision diamond 4 is checked by the control unit, whether the increasing by activation of the starter generator speed has reached a predetermined in the control unit start speed.
  • control unit closes the decompression valves and activates the fuel injector so that the engine responds and starts according to status rectangle 6, after which the starter function of the starter generator is turned off and switched to the generator function.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
EP18178192.3A 2017-07-12 2018-06-18 Procédé destiné au demarrage d'un moteur à combustion interne Withdrawn EP3428445A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017115596.1A DE102017115596A1 (de) 2017-07-12 2017-07-12 Verfahren zum Starten einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
EP3428445A1 true EP3428445A1 (fr) 2019-01-16

Family

ID=62705467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18178192.3A Withdrawn EP3428445A1 (fr) 2017-07-12 2018-06-18 Procédé destiné au demarrage d'un moteur à combustion interne

Country Status (6)

Country Link
US (1) US20190017459A1 (fr)
EP (1) EP3428445A1 (fr)
CN (1) CN109253011A (fr)
BR (1) BR102018014189A2 (fr)
DE (1) DE102017115596A1 (fr)
RU (1) RU2018125484A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111058953A (zh) * 2019-12-28 2020-04-24 潍柴动力股份有限公司 发动机起动系统、发动机及发动机起动方法
CN111396203A (zh) * 2020-03-26 2020-07-10 扬州翊翔航空科技有限公司 一种无人机用微型混动系统的辅助起动装置及控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004032918A1 (de) * 2004-07-08 2006-02-02 Robert Bosch Gmbh Vorrichtung und Verfahren zum Start einer Brennkraftmaschine mit mehreren Zylindern
DE102005001144A1 (de) * 2005-01-11 2006-08-03 Mehnert, Jens, Dr.-Ing. Verfahren und Vorrichtung zur Steuerung der Inbetriebnahme von Verbrennungskraftmaschinen
DE102006025439A1 (de) * 2005-06-07 2006-12-14 Hitachi, Ltd. Kompressionszündungsmotor
DE102011078913A1 (de) * 2011-07-11 2013-01-17 Robert Bosch Gmbh Brennkraftmaschine, insbesondere für Hybridfahrzeuge
EP2993342A1 (fr) * 2014-09-03 2016-03-09 GE Jenbacher GmbH & Co. OG Procede destine au demarrage d'un moteur a combustion interne

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JP2574292Y2 (ja) * 1992-05-18 1998-06-11 株式会社共立 エンジンのデコンプ装置
JP3103000B2 (ja) * 1994-11-21 2000-10-23 株式会社共立 デコンプ装置付内燃エンジン
JP2000227064A (ja) * 1999-02-04 2000-08-15 Sanshin Ind Co Ltd 船外機用エンジンのデコンプ装置
US6761148B2 (en) * 2001-09-03 2004-07-13 Prufrex-Electro-Apparateubau, Inh. Helga Muller, Geb Dutschke Electronic rotation speed-dependent control and/or diagnosis process for combustion engines
DE10243167B4 (de) * 2002-09-18 2013-01-17 Andreas Stihl Ag & Co. Verbrennungsmotor mit einem Vergaser und einer Starteinrichtung
US20070204827A1 (en) * 2006-03-02 2007-09-06 Kokusan Denki Co., Ltd. Engine starting device
JP4682966B2 (ja) * 2006-11-06 2011-05-11 国産電機株式会社 エンジン始動方法及び装置
JP2009024540A (ja) * 2007-07-18 2009-02-05 Kokusan Denki Co Ltd エンジン始動装置
JP2011236743A (ja) * 2010-04-30 2011-11-24 Hitachi Koki Co Ltd エンジンおよびそれを備えたエンジン作業機
CN103375242B (zh) * 2012-04-23 2019-11-12 北京奋进科技有限公司 内燃机混合燃烧控制方法
US9850825B2 (en) * 2012-10-03 2017-12-26 Nissan Motor Co., Ltd. Vehicle control device with automatic engine stop function
DE102013005807A1 (de) * 2013-04-04 2014-10-09 Andreas Stihl Ag & Co. Kg Verfahren zum Betrieb eines Verbrennungsmotors
AT514127B1 (de) 2013-04-09 2015-02-15 MAN Truck & Bus Österreich AG Vorrichtung zum Fördern von Druckluft für druckluftbetriebene Einrichtungen in Kraftfahrzeugen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004032918A1 (de) * 2004-07-08 2006-02-02 Robert Bosch Gmbh Vorrichtung und Verfahren zum Start einer Brennkraftmaschine mit mehreren Zylindern
DE102005001144A1 (de) * 2005-01-11 2006-08-03 Mehnert, Jens, Dr.-Ing. Verfahren und Vorrichtung zur Steuerung der Inbetriebnahme von Verbrennungskraftmaschinen
DE102006025439A1 (de) * 2005-06-07 2006-12-14 Hitachi, Ltd. Kompressionszündungsmotor
DE102011078913A1 (de) * 2011-07-11 2013-01-17 Robert Bosch Gmbh Brennkraftmaschine, insbesondere für Hybridfahrzeuge
EP2993342A1 (fr) * 2014-09-03 2016-03-09 GE Jenbacher GmbH & Co. OG Procede destine au demarrage d'un moteur a combustion interne

Also Published As

Publication number Publication date
BR102018014189A2 (pt) 2019-06-11
US20190017459A1 (en) 2019-01-17
DE102017115596A1 (de) 2019-01-17
RU2018125484A (ru) 2020-01-13
CN109253011A (zh) 2019-01-22

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