WO2007049780A1 - Moteur diesel utilisant du dimethylether en tant que carburant - Google Patents

Moteur diesel utilisant du dimethylether en tant que carburant Download PDF

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Publication number
WO2007049780A1
WO2007049780A1 PCT/JP2006/321591 JP2006321591W WO2007049780A1 WO 2007049780 A1 WO2007049780 A1 WO 2007049780A1 JP 2006321591 W JP2006321591 W JP 2006321591W WO 2007049780 A1 WO2007049780 A1 WO 2007049780A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
engine
fuel
common rail
dme
Prior art date
Application number
PCT/JP2006/321591
Other languages
English (en)
Japanese (ja)
Inventor
Takeshi Tokumaru
Original Assignee
Isuzu Motors Limited
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 Isuzu Motors Limited filed Critical Isuzu Motors Limited
Publication of WO2007049780A1 publication Critical patent/WO2007049780A1/fr

Links

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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/08—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for non-gaseous fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • 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
    • 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
    • F02D41/22—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
    • 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
    • F02D2041/225—Leakage detection
    • 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
    • F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the present invention relates to a diesel engine that uses dimethyl ether (DME) as a fuel, and more particularly to a diesel engine that is equipped with a so-called common rail material supply device and injects liquid-floated DME into a cylinder.
  • DME dimethyl ether
  • DME dimethyl ether
  • DME is an ether having the structure of CH 3 OCH 3 and has a boiling point of about _25 ° C, and can be easily liquidified by applying pressure or low temperature. For this reason, transportation and storage are simple, and there are few harmful components in the exhaust gas, and the cetane number, which is an indicator of fuel compatibility of a single cell engine, is high. R & D for fuel is being promoted for practical use.
  • this fuel supply apparatus includes a high-pressure fuel accumulator tube 3 called a common rail between a fuel injection pump 1 and a fuel injection valve 2 attached to each cylinder of the engine.
  • the high-pressure fuel sent from the fuel injection pump 1 is once accumulated in the common rail 3 and then the accumulated fuel is injected into each cylinder by the fuel injection valve 2.
  • the fuel injection valve 2 in the common rail fuel supply system is as shown in Fig. 3.
  • a solenoid valve 21 for controlling fuel injection is provided.
  • the high-pressure fuel pumped from the fuel injection pump 1 is sent to the fuel reservoir formed in the hole of the holder 2 3 where the needle valve 2 2 slides, and to the control chamber 2 5 at the top of the control piston 24. Sent.
  • the needle valve 22 is pushed downward by the spring 26 and its tip is seated on the seal portion 27.
  • the solenoid valve 21 opens the orifice 28 and opens the high-pressure fuel from the control port chamber 25 to the low-pressure fuel return pipe.
  • the pressure at the top of the chondro piston 24 drops, the needle valve 22 is pushed up by the fuel pool high J3E fuel and leaves the seal part 27, and high-pressure fuel is injected into the cylinder from the nozzle 29. Is done.
  • the orifice 2 8 is closed by the solenoid valve 21, the pressure in the control inlet / outlet chamber 25 is increased, and the needle valve 2 2 is seated on the seal portion '2 7.
  • the fuel injection valve that opens and closes the nozzle hole with the needle # is not limited to the common rail type fuel supply device, but is generally used in diesel engines.
  • the common rail fuel supply system makes it easy to increase the pressure of the injected fuel, and it is easy to precisely control the fuel injection amount and injection timing, such as particulate matter (PM) or nitrogen oxide (NO x).
  • This fuel supply device is effective in suppressing the generation of harmful exhaust gas components from the diesel engine.
  • Such a common rail fuel supply device is known to be applied to a diesel engine that uses DME as a fuel, and is disclosed in, for example, Japanese Patent Application Laid-Open No. 2 0 03-5 6 4 10.
  • DME is a fuel that becomes a gas at normal temperature and normal pressure, and is capable of being liquefied by pressurization. Its viscosity is lower than that of light oil or the like normally used as fuel for diesel engines. Diesel engine fuel supply systems have seals to prevent leakage of high-pressure fuel at various locations, and this point remains the same even with common rail fuel supply systems.
  • the fuel injection valve is controlled using a solenoid valve, and as described above, when fuel is not injected, a seal portion on which a dollar valve is seated, or an electromagnetic valve There is a seal section where the valve closes the orifice. Because liquefied DME has low viscosity, There is a tendency for leakage to occur in the seals of the fuel supply system compared to the fuel from Zellengjin.
  • a diesel engine equipped with a common rail fuel supply device and using DME as fuel prevents the engine from being damaged by a leaked DME when restarting after stopping the engine
  • the present invention detects a pressure inside a fuel supply device such as a common rail in a diesel engine equipped with a common rail fuel supply device using DME as fuel, and stores the pressure when the engine is stopped. If the pressure detected at the time of restarting is lower than the predetermined value, starting the engine is prohibited. That is, the present invention, as described in claim 1,
  • the control device stores the pressure when the storage means stops when the engine is stopped, and the pressure detection means detects the pressure in the fuel supply device when the engine is restarted, and the pressure is stored. When the pressure is lower than the specified pressure by more than the specified value, prohibit engine restart. ''
  • FIG. 3 is a view showing a fuel injection valve of the common rail fuel supply apparatus.
  • BEST MODE FOR CARRYING OUT THE INVENTION embodiments of the fuel supply apparatus of the present invention using DME as fuel will be described with reference to the drawings.
  • Fig. 1 shows the outline of a common rail fuel supply apparatus to which the present invention is applied. The basic equipment configuration and operation are shown in the background art section. It is no different from the device.
  • a common rail 3 that is a fuel accumulator pipe is provided between the fuel injection pump 1 and the fuel injection valve 2 for increasing the pressure of the fuel.
  • the fuel injection valve 2 injects the accumulated fuel into each cylinder. To do.
  • the predetermined value for determining prohibition of restart is the common rail 3 in the common rail 3 that is generated when a failure occurs in the seat portion 2 7 (Fig. 3) where the needle valve 2 2 of the fuel injection valve 2 is seated and the DME leaks. It is determined by confirming the pressure drop through experiments. If the engine has been stopped for a long time, an inevitable pressure drop occurs even if there is no seal failure. Therefore, the predetermined value may be changed according to the stop time while taking this point into consideration. By using a predetermined value that assumes a poor seal at the seat of the $ 21 fuel injection valve, engine damage due to explosive combustion of the leaked DME can be prevented.
  • a flowchart of the operation procedure in the control device 8 of the present invention is shown in FIG.
  • step SA2 it is determined whether or not the engine key is OF F. If the engine key is ON, the process returns to SA 1 to detect the common rail pressure again. If the engine key is turned OFF, the process proceeds to step SA3, where the engine is stopped, and the common rail pressure (CRP e) immediately after the engine is stopped is stored (SA4). In this way, the operation procedure when the engine is stopped is completed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un moteur diesel utilisant du diméthyléther (DME) en tant que au carburant, équipé d'un circuit d'alimentation à rampe commune, ce moteur étant protégé contre les dégâts causés les fuites de DME. Ce moteur comprend une commande (8) pourvue de moyens (81) de détection de pression, et de moyens (82) de mémorisation, qui permette de détecter la pression dans le circuit d'alimentation en carburant, par exemple la pression dans la rampe commune (3), et de mémoriser cette pression à l'arrêt du moteur. Lors du redémarrage du moteur, la pression est détectée au même emplacement, et si la pression détectée est inférieure à la pression mémorisée, à raison d'une valeur égale ou supérieure à une valeur prédéterminée, le démarrage du moteur est empêché. Etant donné que le démarrage du moteur n'est pas possible en cas de baisse de la pression dans la rampe commune (3) due à une défectuosité de l'élément d'étanchéité de la soupape (2) d'injection, les dégâts causés au moteur par la combustion du DME qui a fui sont évités, même en cas d'accumulation de DME dans le cylindre.
PCT/JP2006/321591 2005-10-28 2006-10-24 Moteur diesel utilisant du dimethylether en tant que carburant WO2007049780A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-314684 2005-10-28
JP2005314684A JP4670588B2 (ja) 2005-10-28 2005-10-28 ジメチルエーテルを燃料とするディーゼルエンジン

Publications (1)

Publication Number Publication Date
WO2007049780A1 true WO2007049780A1 (fr) 2007-05-03

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Application Number Title Priority Date Filing Date
PCT/JP2006/321591 WO2007049780A1 (fr) 2005-10-28 2006-10-24 Moteur diesel utilisant du dimethylether en tant que carburant

Country Status (2)

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JP (1) JP4670588B2 (fr)
WO (1) WO2007049780A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9657653B2 (en) 2014-06-09 2017-05-23 Caterpillar Inc. Gas pressure high and low detection
CN108223195A (zh) * 2018-01-22 2018-06-29 哈尔滨工程大学 一种电磁阀保护型双燃料发动机燃气气路系统及控制方法
CN113482823A (zh) * 2021-07-02 2021-10-08 东风商用车有限公司 诊断燃油喷射系统故障的方法、装置和具有该装置的汽车

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009203840A (ja) * 2008-02-27 2009-09-10 Hitachi Ltd エンジン燃料系異常診断・フェールセーフ制御装置及び方法
JP5187228B2 (ja) * 2009-02-24 2013-04-24 株式会社デンソー 燃料噴射装置
JP5699699B2 (ja) * 2011-03-10 2015-04-15 いすゞ自動車株式会社 燃料ノズル及びリーク検出装置
CN102606345A (zh) * 2012-03-20 2012-07-25 武汉科技大学 一种二甲醚燃料喷射系统
KR20130140383A (ko) * 2012-06-14 2013-12-24 현대자동차주식회사 디메틸에테르 커먼레일 연료 공급장치 및 그 방법
JP6642104B2 (ja) * 2016-02-26 2020-02-05 いすゞ自動車株式会社 内燃機関、車両、及び内燃機関の制御方法
CN113202676A (zh) * 2021-04-29 2021-08-03 安徽江淮汽车集团股份有限公司 汽车起动控制方法、设备、存储介质及装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0565841A (ja) * 1991-09-06 1993-03-19 Nippondenso Co Ltd 内燃機関の異常診断装置
JP2005076543A (ja) * 2003-09-01 2005-03-24 Denso Corp 内燃機関用燃料噴射装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0565841A (ja) * 1991-09-06 1993-03-19 Nippondenso Co Ltd 内燃機関の異常診断装置
JP2005076543A (ja) * 2003-09-01 2005-03-24 Denso Corp 内燃機関用燃料噴射装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9657653B2 (en) 2014-06-09 2017-05-23 Caterpillar Inc. Gas pressure high and low detection
CN108223195A (zh) * 2018-01-22 2018-06-29 哈尔滨工程大学 一种电磁阀保护型双燃料发动机燃气气路系统及控制方法
CN108223195B (zh) * 2018-01-22 2020-09-11 哈尔滨工程大学 一种电磁阀保护型双燃料发动机燃气气路系统及控制方法
CN113482823A (zh) * 2021-07-02 2021-10-08 东风商用车有限公司 诊断燃油喷射系统故障的方法、装置和具有该装置的汽车
CN113482823B (zh) * 2021-07-02 2023-03-03 东风商用车有限公司 诊断燃油喷射系统故障的方法、装置和具有该装置的汽车

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Publication number Publication date
JP2007120422A (ja) 2007-05-17
JP4670588B2 (ja) 2011-04-13

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