JP4663017B2 - Inspection method for fluid fuel injection system for ignition - Google Patents

Inspection method for fluid fuel injection system for ignition Download PDF

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JP4663017B2
JP4663017B2 JP2009004052A JP2009004052A JP4663017B2 JP 4663017 B2 JP4663017 B2 JP 4663017B2 JP 2009004052 A JP2009004052 A JP 2009004052A JP 2009004052 A JP2009004052 A JP 2009004052A JP 4663017 B2 JP4663017 B2 JP 4663017B2
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fuel
ignition
fluid fuel
injection device
inspection method
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JP2009168026A (en
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ニコラウス・ベックホフ
アクセル・ハーネンカンプ
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エムアーエヌ・ディーゼル・エスエー
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    • 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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • 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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/001—Measuring fuel delivery of a fuel injector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/18—Applying ornamental structures, e.g. shaped bodies consisting of plastic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/10—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/10—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder
    • F02B19/1019—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber
    • F02B19/108—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber with fuel injection at least into pre-combustion chamber, i.e. injector mounted directly in the pre-combustion chamber
    • F02B19/1085—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber with fuel injection at least into pre-combustion chamber, i.e. injector mounted directly in the pre-combustion chamber controlling fuel injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0602—Control of components of the fuel supply system
    • F02D19/0607—Control of components of the fuel supply system to adjust the fuel mass or volume flow
    • F02D19/061—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0626—Measuring or estimating parameters related to the fuel supply system
    • F02D19/0628—Determining the fuel pressure, temperature or flow, the fuel tank fill level or a valve position
    • F02D19/0631—Determining the fuel pressure, temperature or flow, the fuel tank fill level or a valve position by estimation, i.e. without using direct measurements of a corresponding sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
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    • F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02D19/0686—Injectors
    • F02D19/0692—Arrangement of multiple injectors per combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
    • F02D19/10—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
    • F02D19/10—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
    • F02D19/105—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous operating in a special mode, e.g. in a liquid fuel only mode for starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
    • 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
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • 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
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/722—Decorative or ornamental articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
    • B44C3/02—Superimposing layers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06Q—DECORATING TEXTILES
    • D06Q1/00—Decorating textiles
    • D06Q1/10—Decorating textiles by treatment with, or fixation of, a particulate material, e.g. mica, glass beads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F02D19/0644—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being hydrogen, ammonia or carbon monoxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F02D19/0647—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
    • 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
    • F02D2200/1015—Engines misfires
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    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
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    • Y02T10/00—Road transport of goods or passengers
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    • 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
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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Testing Of Engines (AREA)

Description

本発明は、多燃料機関の、点火用流体燃料噴射装置のための検査方法に関する。当該多燃料機関は、液体燃料とガス燃料とを燃焼室に選択的に供給するための供給装置と、点火用流体燃料の供給のための少なくとも１つの点火用流体燃料噴射装置および、排ガス温度を検出するための測定装置と、測定装置によって検出された排ガス温度を分析するための分析装置とを備えている。   The present invention relates to an inspection method for a fluid fuel injection device for ignition of a multi-fuel engine. The multi-fuel engine includes a supply device for selectively supplying liquid fuel and gas fuel to the combustion chamber, at least one ignition fluid fuel injection device for supplying ignition fluid fuel, and an exhaust gas temperature. A measuring device for detection and an analyzer for analyzing the exhaust gas temperature detected by the measuring device are provided.

ガス駆動において多燃料機関を駆動させる際には、通常は希薄なガス・空気混合気が、燃焼室において、少量の点火用流体燃料の点火エネルギーによって点火される。当該点火用流体燃料は、適切な供給システムを通じ、点火用流体燃料噴射装置によって、たとえばピストンエンジンのピストンが上死点に達する直前に燃焼室へと送り込まれる。   When a multi-fuel engine is driven by gas driving, usually a lean gas / air mixture is ignited in the combustion chamber by a small amount of ignition energy of ignition fluid fuel. The ignition fluid fuel is fed into the combustion chamber through an appropriate supply system by the ignition fluid fuel injection device, for example, just before the piston of the piston engine reaches top dead center.

噴射装置によりピストンエンジンの燃焼室に点火用流体燃料を供給するための既知のシステムによって、ほとんど任意に構成可能な噴射プロセスが可能となる。噴射開始や噴射終了、および噴射装置を通過する点火用流体燃料の体積流量が、自由に選択可能である。さらに多燃料機関には、たいてい電子工学式の機関制御装置が備えられており、当該機関制御装置は常に、駆動燃料や排ガスの温度、出力値、燃焼パラメータ、回転数、圧力などの、機関の駆動データを検出する。   Known systems for supplying ignition fluid fuel to the combustion chamber of a piston engine by means of an injector allow an almost arbitrarily configurable injection process. The start and end of injection, and the volume flow rate of the ignition fluid fuel passing through the injection device can be freely selected. In addition, multi-fuel engines are usually equipped with an electronic engine control device, which always controls the engine fuel temperature, output value, combustion parameters, rotational speed, pressure, etc. Drive data is detected.

燃焼残滓による噴射装置の損傷あるいは損耗、あるいは点火用流体燃料供給における不明な欠陥が、点火用流体燃料噴射の中断をもたらしかねない。点火用流体燃料噴射の中断により、ガス駆動においては、該当するシリンダー内での燃焼停止に至る。シリンダー内での燃焼停止は、一方では機関の出力低下をもたらし、他方では燃焼しなかったガス・空気混合気が排ガス装置へと達し、局地的に不都合な境界条件下では爆発さえ引き起こしかねない。それゆえガス駆動における燃焼停止は、避けるべきである。それゆえ、すでにガス駆動に切り替える前に、点火用流体燃料噴射の稼働能力を検査できることが望ましい。   Damage or wear to the injector due to combustion residues, or unknown deficiencies in the ignition fluid fuel supply, can lead to interruptions in the ignition fluid fuel injection. Due to the interruption of the ignition fluid fuel injection, in the gas drive, the combustion in the corresponding cylinder is stopped. Stoppage of combustion in the cylinder will cause a reduction in engine power on the one hand, and the gas / air mixture that did not burn on the other will reach the exhaust system and may even cause an explosion under locally unfavorable boundary conditions. . Therefore, stoppage of combustion in gas drive should be avoided. Therefore, it is desirable to be able to test the operating capability of ignition fluid fuel injection before switching to gas drive.

多燃料機関をガス駆動に切り替える前、先行する液体燃料駆動の間にすでに点火用流体燃料噴射装置を検査することは、これまでは不可能であった。点火用流体燃料噴射装置の機能不全はこれまでのところ、出力低下や、ガス駆動において機関がスムーズに働かなくなったことに基づいて、もしくは排ガス内のガスの比率に基づいて、認識されている。今までは目視による検査の形態で、あるいはそれぞれのシリンダーの出力検出もしくは運転挙動に基づいて、点火用流体燃料噴射装置の損傷もしくは損耗の位置確認が行われる。   Before switching a multi-fuel engine to gas drive, it has not been possible to inspect the ignition fluid fuel injection device already during the preceding liquid fuel drive. Up to now, malfunctions of the ignition fluid fuel injection device have been recognized based on a reduction in output, on the basis of the fact that the engine does not work smoothly in gas drive, or on the basis of the ratio of gas in the exhaust gas. Until now, the position of damage or wear of the ignition fluid fuel injection device is confirmed in the form of visual inspection or based on the output detection or operation behavior of each cylinder.

それゆえ本発明の課題は、点火用流体燃料噴射装置のための検査方法を実現することであり、当該検査方法によって、多燃料機関の点火用流体燃料噴射装置の機能検査が、液体燃料駆動の間に可能となる。   Therefore, an object of the present invention is to realize an inspection method for an ignition fluid fuel injection device, and by the inspection method, a function inspection of an ignition fluid fuel injection device of a multi-fuel engine can be performed with liquid fuel drive. It becomes possible in between.

当該課題は、本発明により、請求項１に記載の方法によって解決される。有利なさらなる形態は、従属請求項の対象となっている。   This problem is solved according to the invention by the method according to claim 1. Advantageous further forms are subject to the dependent claims.

本発明に係る方法は、課題解決に際して以下のステップを有している。
ａ）液体燃料駆動において多燃料機関を駆動させ、少なくとも１つの点火用流体燃料噴射装置が、当該多燃料機関のシリンダーの燃焼室に点火用流体燃料を噴射するステップと、
ｂ）１つあるいは複数の点火用流体燃料噴射装置の噴射時間および／または噴射量を変えるステップと、
ｃ）点火用流体燃料噴射装置の噴射時間および／または噴射量を変化させている間に測定装置によって検出された、排ガス温度の値を分析するステップ。 The method according to the present invention includes the following steps in solving the problem.
a) driving a multi-fuel engine in liquid fuel drive, wherein at least one ignition fluid fuel injection device injects ignition fluid fuel into a combustion chamber of a cylinder of the multi-fuel engine;
b) changing the injection time and / or injection quantity of one or more ignition fluid fuel injectors;
c) analyzing the value of the exhaust gas temperature detected by the measuring device while changing the injection time and / or the injection amount of the ignition fluid fuel injection device.

本発明の方法は、様々な液体およびガス状の燃料によって駆動可能な多燃料機関に適している。本発明においては、液体燃料として、好ましくはセタン価が３０以上の点火しやすい燃料が問題となっており、当該燃料は、ディーゼル原理にしたがって機関の駆動を可能にしている。さらに、点火しにくい液体燃料、すなわちセタン価３０以下でかつ点火のためにたとえば点火プラグのような付加的装置を必要とする液体燃料にも適している。   The method of the present invention is suitable for multi-fuel engines that can be driven by various liquid and gaseous fuels. In the present invention, the liquid fuel is preferably a fuel that is easily ignited with a cetane number of 30 or more, and the fuel enables the engine to be driven according to the diesel principle. Furthermore, it is also suitable for liquid fuels that are difficult to ignite, that is, liquid fuels that have a cetane number of 30 or less and that require additional devices such as spark plugs for ignition.

本発明に係る方法の応用に適した多燃料機関は、液体燃料による駆動から、好適には点火しやすい希薄な燃料・空気混合気、好ましくはガス状燃料を有する燃料・空気混合気による駆動法へと切替可能になるように実施される。さらに、ガス状燃料だけでなく、当該方法は希薄な液体燃料・空気混合気に点火するための点火用流体燃料噴射装置にも同様に応用可能である。そのような多燃料機関のための燃焼ガスとして、たとえば天然ガス、液化ガス、薪ガス、バイオガス、廃棄物から発生するガス、メタン（Grubengase）あるいは水素を使用することができる。   The multi-fuel engine suitable for application of the method according to the present invention is driven by a liquid fuel, preferably a lean fuel / air mixture that is easily ignited, preferably a fuel / air mixture having a gaseous fuel. It is implemented so that it can be switched to. In addition to gaseous fuel, the method is equally applicable to igniting fluid fuel injectors for igniting lean liquid fuel / air mixtures. As combustion gas for such a multi-fuel engine, for example, natural gas, liquefied gas, soot gas, biogas, gas generated from waste, methane (Grubengase) or hydrogen can be used.

ガス駆動もしくはリーン駆動において燃焼室に供給される希薄なガス・空気混合気は通常、明らかに空気過剰であり、それゆえ火花点火のために点火用流体燃料が当該燃焼室に噴射され、当該点火用流体燃料の点火エネルギーがガス・空気混合気に火をつける。点火用流体燃料としては通常、当該目的に適した液体燃料が用いられ、当該液体燃料は好ましくは、多燃料機関の液体燃料駆動においても使用される。   The lean gas / air mixture supplied to the combustion chamber in a gas drive or lean drive is usually clearly excessive in air, so that ignition fluid fuel is injected into the combustion chamber for spark ignition, and the ignition The ignition energy of the fluid fuel ignites the gas / air mixture. As the ignition fluid fuel, a liquid fuel suitable for the purpose is usually used, and the liquid fuel is preferably used also in a liquid fuel drive of a multi-fuel engine.

本発明に係る検査方法の実施に適した多燃料機関は、液体燃料を第１の燃焼室に供給するための第１の供給装置を備えている。多燃料機関のシリンダーは、本発明においては、１つあるいは複数の燃焼室を備えている。以下においては、シリンダーの主燃焼室が第１燃焼室と呼ばれている。供給装置は、複数の様々な液体燃料を供給するのにも適していてよい。第１供給装置は好ましくはポンプ装置と燃料管とを備えており、また燃料を直接多燃料機関の燃焼室に送り込む噴射装置あるいは、燃料・空気混合気を生成しかつ供給するための装置で、混合気の生成後に初めて液体燃料を燃焼室へと送り込む装置のいずれかを備えている。   The multi-fuel engine suitable for carrying out the inspection method according to the present invention includes a first supply device for supplying liquid fuel to the first combustion chamber. In the present invention, a cylinder of a multi-fuel engine is provided with one or a plurality of combustion chambers. In the following, the main combustion chamber of the cylinder is called the first combustion chamber. The supply device may also be suitable for supplying a plurality of different liquid fuels. The first supply device preferably comprises a pump device and a fuel pipe, and is an injection device for directly sending fuel to the combustion chamber of a multi-fuel engine or a device for generating and supplying a fuel / air mixture, One of the devices that feeds liquid fuel into the combustion chamber for the first time after the mixture is generated is provided.

さらに上記のような多燃料機関は、ガス状燃料を機関の燃焼室に供給するための第２の供給装置を備えている。当該供給装置は、好適には希薄なガス・空気混合気を、すでに燃焼室に供給する前に生成するよう、好ましくは形成されている。   Further, the multi-fuel engine as described above includes a second supply device for supplying gaseous fuel to the combustion chamber of the engine. The supply device is preferably configured to produce a suitably lean gas / air mixture before it is already supplied to the combustion chamber.

多燃料機関はさらに、点火用流体燃料を機関の燃焼室に供給するための第３の供給装置を備えている。第３の供給装置は、好ましくは多燃料機関のシリンダーそれぞれのために１つあるいは複数の点火用流体燃料噴射装置を備えている。それぞれのシリンダーに備えられる際に、点火用流体燃料噴射装置は、点火用流体燃料が多燃料機関のシリンダーの第１燃焼室に直接噴射されるよう、設けられることができる。しかしながら点火用流体燃料噴射装置は、第２燃焼室たとえばいわゆる予燃焼室においても設けられ得る。点火用流体燃料は燃焼室において、自己点火によって、あるいは適当な点火装置によって点火される。点火用流体燃料噴射装置がシリンダーの第２燃焼室に設置されている場合、当該第２燃焼室は第１燃焼室への１つあるいは複数の接続部を備えており、当該接続部を通じて点火エネルギーは、第２燃焼室から第１燃焼室へと伝達され、第１燃焼室にあるガス・空気混合気に点火される。第２燃焼室においては、燃焼室の形態に関連して複数の点火用流体燃料噴射装置が設置され得、さらに複数の第２燃焼室もシリンダーの第１燃焼室と連結され得る。点火用流体燃料噴射装置は、好ましくは液体燃料駆動においてもガス駆動においても、シリンダーに点火用流体燃料を供給し、噴射装置の損耗を回避する。当該方法は、第１供給装置の噴射装置と統合されて形成されている点火用流体燃料噴射装置にも同様に適しており、当該点火用流体燃料噴射装置の噴射は、第１供給装置の噴射機能とは独立して制御可能である。   The multi-fuel engine further includes a third supply device for supplying ignition fluid fuel to the combustion chamber of the engine. The third supply device preferably comprises one or more ignition fluid fuel injectors for each cylinder of the multi-fuel engine. When provided in each cylinder, the ignition fluid fuel injection device can be provided such that the ignition fluid fuel is directly injected into the first combustion chamber of the cylinder of the multi-fuel engine. However, the ignition fluid fuel injection device can also be provided in a second combustion chamber, for example, a so-called precombustion chamber. The ignition fluid fuel is ignited in the combustion chamber by self-ignition or by a suitable ignition device. When the ignition fluid fuel injection device is installed in the second combustion chamber of the cylinder, the second combustion chamber has one or more connections to the first combustion chamber, and the ignition energy passes through the connection. Is transmitted from the second combustion chamber to the first combustion chamber and ignited in the gas / air mixture in the first combustion chamber. In the second combustion chamber, a plurality of ignition fluid fuel injection devices can be installed in relation to the form of the combustion chamber, and the plurality of second combustion chambers can also be connected to the first combustion chamber of the cylinder. The ignition fluid fuel injection apparatus preferably supplies ignition fluid fuel to the cylinder in both liquid fuel driving and gas driving to avoid wear of the injection apparatus. The method is equally suitable for an ignition fluid fuel injection device that is integrated with the injection device of the first supply device, the injection of the ignition fluid fuel injection device being the injection of the first supply device. It can be controlled independently of the function.

本発明に係る検査方法の応用に適した多燃料機関はさらに、好ましくは機関制御装置の一部分として、多燃料機関の排ガス温度を検出する測定装置を備えている。好ましくは、当該測定装置は、多燃料機関のそれぞれ個々のシリンダーの排ガス温度を検出する。方法の実施のためにさらに、測定装置によって検出された排ガス温度の値を分析するための分析装置が備えられている。検出と測定の際に測定装置および分析装置は好ましくは、検査方法の間の排ガス温度の短時間の変化も検出可能かつ分析可能なように形成されている。好適には排ガス温度の変化は、シリンダーのほんの数ストローク後にすでに特定され得る。   The multi-fuel engine suitable for application of the inspection method according to the present invention preferably further includes a measuring device for detecting the exhaust gas temperature of the multi-fuel engine as a part of the engine control device. Preferably, the measuring device detects the exhaust gas temperature of each individual cylinder of the multi-fuel engine. For the implementation of the method, an analysis device is further provided for analyzing the value of the exhaust gas temperature detected by the measuring device. During the detection and measurement, the measuring device and the analyzing device are preferably configured such that short-term changes in the exhaust gas temperature during the inspection method can also be detected and analyzed. Suitably the change in exhaust gas temperature can already be determined after only a few strokes of the cylinder.

本発明に係る方法を実施する際、機関は液体燃料駆動で動かされる。すでに述たように、検査されるべき点火用流体燃料噴射装置は、好ましくは液体燃料駆動においても動作する。好適には検査方法は、多燃料機関が低負荷もしくは部分負荷、好ましくは５から２５％の範囲内での負荷で駆動されている間、実施される。当該範囲内においては、本発明に係る検査方法によって特に述べるに値する成果を出すことができる。   In carrying out the method according to the invention, the engine is operated with a liquid fuel drive. As already mentioned, the ignition fluid fuel injector to be tested preferably also operates in liquid fuel drive. Preferably, the inspection method is carried out while the multi-fuel engine is being driven at a low load or partial load, preferably a load in the range of 5 to 25%. Within this range, results worthy of mention can be obtained by the inspection method according to the present invention.

本発明の実施例にしたがえば、検査プロセスの際には、できる限り変動しない負荷での駆動段階で、点火用流体燃料噴射装置の噴射時間が変えられる。点火用流体燃料噴射装置を通る体積流量が変動しない場合、噴射時間が長くなれば、より多くの点火用流体燃料がシリンダーの第１燃焼室、あるいは機関の構造によっては第２燃焼室へと達し、それによって当該シリンダーの排ガス温度が上昇する。   According to an embodiment of the present invention, during the inspection process, the injection time of the ignition fluid fuel injection device is changed in a driving stage with a load that does not vary as much as possible. If the volumetric flow rate through the ignition fluid fuel injector does not vary, more ignition fluid fuel can reach the first combustion chamber of the cylinder or the second combustion chamber depending on the engine structure if the injection time is increased. This raises the exhaust gas temperature of the cylinder.

同様に、点火用流体燃料噴射装置の噴射時間を短縮することも可能であり、噴射時間の短縮によってより少量の点火用流体燃料が燃焼室へと達し、排ガス温度の低下をもたらす。   Similarly, it is possible to reduce the injection time of the ignition fluid fuel injection device, and by reducing the injection time, a smaller amount of ignition fluid fuel reaches the combustion chamber, resulting in a decrease in exhaust gas temperature.

点火用流体燃料噴射の際、延長される噴射時間の噴射開始を早め、および／あるいは噴射終了を遅らせることが可能である。噴射時間が短縮されるという逆の場合には、噴射開始を遅らせ、および／あるいは噴射終了を早めることができる。   During the ignition fluid fuel injection, the injection start of the extended injection time can be advanced and / or the end of the injection can be delayed. In the opposite case where the injection time is reduced, the start of injection can be delayed and / or the end of injection can be advanced.

同様に、噴射装置を通る体積流量を変えることによって点火用流体燃料の噴射量を変えることが可能であり、液体燃料駆動中の多燃料機関の燃焼室において、同様により多くの点火用流体燃料あるいはより少ない点火用流体燃料を送り込むことができ、これにより同様にシリンダーの排ガス温度の上昇もしくは低下が引き起こされる。   Similarly, it is possible to change the injection quantity of ignition fluid fuel by changing the volume flow rate through the injector, and in the combustion chamber of a multi-fuel engine driven by liquid fuel, as well as more ignition fluid fuel or Less igniting fluid fuel can be pumped, which also causes the cylinder exhaust gas temperature to rise or fall.

本発明に係る方法の好ましい形態においては、検査される噴射装置の噴射時間が、あらかじめ設定された検査サイクルに応じて変えられ、当該検査サイクルにおいてたとえば、点火用流体燃料噴射装置の最短の噴射時間から点火用流体燃料噴射装置の最長の噴射時間まで噴射時間が延ばされる。最長の噴射時間では、点火用流体燃料噴射装置が機能している場合、排ガス温度はかかった負荷の平均値を越えて上昇し、最短の噴射時間では排ガス温度はかかった負荷の平均値を下回る。   In a preferred form of the method according to the invention, the injection time of the injector to be inspected is varied according to a preset inspection cycle, for example the shortest injection time of the ignition fluid fuel injector To the longest injection time of the ignition fluid fuel injection device. At the longest injection time, when the ignition fluid fuel injection device is functioning, the exhaust gas temperature rises above the average value of the applied load, and at the shortest injection time, the exhaust gas temperature is below the average value of the applied load .

点火用流体燃料噴射装置が、機能不全のために、燃焼室に過多または過少の点火用流体燃料を送り込んだり、あるいはまったく送り込まなかったりする場合には、測定装置が、多燃料機関の排ガス温度の過大または過小な変化もしくはまったく変化していないことを検出する。測定装置の検出により、すでに多燃料機関のガス駆動が開始される前に、点火用流体燃料噴射装置の稼働能力が検査され得る。   If the ignition fluid fuel injector fails to deliver too much or too little ignition fluid fuel into the combustion chamber due to malfunction, or does not send it at all, the measuring device will measure the exhaust gas temperature of the multi-fuel engine. Detects over or under change or no change at all. By the detection of the measuring device, the operating capability of the ignition fluid fuel injection device can be checked before the gas drive of the multi-fuel engine is already started.

１つのシリンダーに複数の点火用流体燃料噴射装置が設置されている場合には、個々の点火用流体燃料噴射装置の機能テストは、好ましくは次々に連続して実施される。多燃料機関に設置された測定装置によって、個々のシリンダーの排ガス温度ではなく、多燃料機関の過半数あるいはすべてのシリンダーの排ガス温度のみが検出される場合、好適には同様の処置が行われる。   In the case where a plurality of ignition fluid fuel injection devices are installed in one cylinder, the functional tests of the individual ignition fluid fuel injection devices are preferably carried out successively one after another. If the measuring device installed in the multi-fuel engine detects not only the exhaust gas temperature of individual cylinders but the majority of the multi-fuel engine or the exhaust gas temperatures of all cylinders, the same procedure is preferably performed.

分析装置は、測定装置によって検出された排ガス温度値の分析に利用され、かつ好ましくは、機能していない点火用流体燃料噴射装置の位置確認をするために、検査される点火用流体燃料噴射装置に、検出された測定値を割り当てることに利用される。本発明に係る検査方法によって得られる分析結果により、点火用流体燃料噴射装置の故障に基づく不完全な燃焼、あるいは燃焼停止が予想され得る場合、多燃料機関がガス駆動に切り替わるのを回避することができる。   The analyzing device is used for analyzing the exhaust gas temperature value detected by the measuring device, and preferably, the igniting fluid fuel injection device to be inspected to confirm the position of the non-functioning igniting fluid fuel injection device Is used to assign a detected measurement value. When the incomplete combustion based on the failure of the ignition fluid fuel injection device can be expected from the analysis result obtained by the inspection method according to the present invention, avoid switching the multi-fuel engine to gas drive. Can do.

分析結果に基づき、点火用流体燃料噴射装置が機能していない、あるいは正しく機能していないことが認識されることによってさらに、たとえば多燃料機関の個々のシリンダーのみにガスが供給され得ない。１つのシリンダーに複数の点火用流体燃料噴射装置が設置されている場合には、当該その他の点火用流体燃料噴射装置の噴射時間および／あるいは噴射量を増やすことができる。結局のところ、検査結果は、必要なメンテナンスの計画と実施の助けとなる。   Based on the analysis results, it is recognized that the ignition fluid fuel injection device is not functioning or is not functioning properly, and further, for example, gas cannot be supplied only to individual cylinders of a multi-fuel engine. When a plurality of ignition fluid fuel injection devices are installed in one cylinder, the injection time and / or injection amount of the other ignition fluid fuel injection devices can be increased. After all, the test results help plan and implement the necessary maintenance.

本発明のさらなる利点、特徴、応用の可能性は、図と関連した以下の記述から明らかとなる。図が示すのは、以下の通りである。   Further advantages, features and potential applications of the present invention will become apparent from the following description in conjunction with the figures. The figure shows the following:

本発明に係る検査方法の応用に適した多燃料機関である。This is a multi-fuel engine suitable for application of the inspection method according to the present invention. 点火用流体燃料噴射装置が機能している場合の、模範的な検査サイクルの間のシリンダーの排ガス温度の時間による模範的な経過である。FIG. 4 is an exemplary progression of cylinder exhaust gas temperature over time during an exemplary inspection cycle when an ignition fluid fuel injector is functioning. 点火用流体燃料噴射装置が機能していない場合の、検査サイクルの間のシリンダーの排ガス温度の時間による経過である。The time course of the exhaust gas temperature of the cylinder during the inspection cycle when the ignition fluid fuel injector is not functioning.

図１には、本発明に係る検査方法の応用に適した多燃料機関の構成要素が記載されている。当該機関は、既知のように構成されたシリンダーヘッド３を有するシリンダー２を備えている。シリンダー２において、コネクティングロッド５にガイドされているピストン４が移動する。   FIG. 1 shows components of a multi-fuel engine suitable for application of the inspection method according to the present invention. The engine comprises a cylinder 2 having a cylinder head 3 constructed in a known manner. In the cylinder 2, the piston 4 guided by the connecting rod 5 moves.

シリンダーヘッド３には燃料噴射装置６が固定されており、液体燃料は当該燃料噴射装置６を通り、燃料供給管７を介して燃料ポンプ８から直接第１燃焼室９に噴射可能である。燃料噴射装置６と燃料供給管７および燃料ポンプ８とは、液体燃料を第１燃焼室９に供給するための第１供給装置１０の構成要素である。燃料噴射装置６と並んで第２燃焼室１１がシリンダーヘッド３に設置されており、当該第２燃焼室は１つあるいは複数の接続通路１２を介して第１燃焼室９と連結されている（図では好ましい実施例となっており、燃焼室９に点火用流体燃料噴射装置１３が設置されてもよい）。第２燃焼室１１には、点火用流体燃料噴射装置１３が設置されており、当該点火用流体燃料噴射装置１３は、点火用流体燃料供給管１４を介し、点火用流体燃料ポンプ１６によって点火用流体燃料が供給される。第３供給装置１５の点火用流体燃料供給管１４における圧力は、点火用流体燃料ポンプ１６によってもたらされる。   A fuel injection device 6 is fixed to the cylinder head 3, and liquid fuel can be injected directly from the fuel pump 8 into the first combustion chamber 9 via the fuel supply pipe 7 through the fuel injection device 6. The fuel injection device 6, the fuel supply pipe 7, and the fuel pump 8 are components of the first supply device 10 for supplying liquid fuel to the first combustion chamber 9. A second combustion chamber 11 is installed in the cylinder head 3 along with the fuel injection device 6, and the second combustion chamber is connected to the first combustion chamber 9 via one or a plurality of connection passages 12 ( In the figure, a preferred embodiment is shown, and an ignition fluid fuel injection device 13 may be installed in the combustion chamber 9). An ignition fluid fuel injection device 13 is installed in the second combustion chamber 11, and the ignition fluid fuel injection device 13 is ignited by an ignition fluid fuel pump 16 via an ignition fluid fuel supply pipe 14. Fluid fuel is supplied. The pressure in the ignition fluid fuel supply pipe 14 of the third supply device 15 is provided by the ignition fluid fuel pump 16.

機関のガス交換は、既知のように、第１燃焼室９への吸気弁１７と排気弁１８とを介して行われる。ガス・空気混合気は当該模範的実施形態においては、燃焼室の外で作られる。混合気製造の際には、混合気製造装置２０とガス供給管２１とが含まれる第２供給装置１９の構成要素が関わっている。   The gas exchange of the engine is performed via an intake valve 17 and an exhaust valve 18 to the first combustion chamber 9 as is known. The gas / air mixture is created outside the combustion chamber in the exemplary embodiment. In the air-fuel mixture production, the components of the second supply device 19 including the air-fuel mixture production device 20 and the gas supply pipe 21 are involved.

点火用流体燃料噴射装置１３の噴出時間および／または噴出量を変化させる検査サイクルの実施の間、分析装置２５と連結された温度センサー２６は、シリンダー２の排ガス温度を検出し、かつ分析する。   During the execution of the inspection cycle for changing the ejection time and / or the ejection amount of the ignition fluid fuel injection device 13, the temperature sensor 26 connected to the analysis device 25 detects and analyzes the exhaust gas temperature of the cylinder 2.

図２は、本発明に係る検査方法を実施する間の、シリンダー２から排出された排ガスの温度の経過を示している。この図では検査方法は、模範的な検査サイクルの形態で実施された。図示されているのは、検査方法の間の、シリンダー２の排ガス温度の時間による経過である。図２において「ｍ」は、検査前および検査中に機関がｔ１の時点まで駆動されたときにかかった負荷に対する温度の平均値を示している。ｔ１の時点で、噴射時間が最小値にまで低下した。当該低下の結果、比較的短い移行時間の後温度が安定し、当該温度は、検査前および検査中に機関がｔ１の時点まで駆動されたときにかかった負荷に対する平均値「ｍ」の温度よりも低くなっている。ｔ２の時点で点火用流体燃料噴射装置の噴射時間は、最短の噴射時間から最長の噴射時間へと長くなった。そのため、再び比較的短い移行時間の後に、排ガス温度は平均値「ｍ」を超えて上昇する。 FIG. 2 shows the temperature course of the exhaust gas discharged from the cylinder 2 during the execution of the inspection method according to the invention. In this figure, the inspection method was implemented in the form of an exemplary inspection cycle. Shown is the time course of the exhaust gas temperature of the cylinder 2 during the inspection method. In FIG. 2, “m” indicates an average value of the temperature with respect to the load applied when the engine is driven to the time point t 1 before and during the inspection. At the time of t 1, the injection time is reduced to a minimum. As a result of the decrease, the temperature stabilizes after a relatively short transition time, which is the temperature of the average value “m” for the load applied when the engine was driven to the time t 1 before and during the inspection. Is lower than. injection time of the ignition fluid fuel injection system at the time of t 2 was longer from the shortest injection time to the longest injection time. Therefore, again after a relatively short transition time, the exhaust gas temperature rises above the average value “m”.

ｔ３の時点で、点火用流体燃料噴射装置１３の噴射時間は、再び元の値に戻される。再び短い移行時間の後に、排ガス温度はシリンダー２の平均値「ｍ」の領域に戻る。 At the time of t 3, the injection time of the ignition fluid fuel injection system 13 is returned to the original value. After a short transition time again, the exhaust gas temperature returns to the area of the average value “m” of the cylinder 2.

図３は、図２の検査サイクルを実施する間の、シリンダー２から排出された排ガスの温度の経過を示しており、当該検査は故障した点火用流体燃料噴射装置１３によって実施された。測定開始時には、同様に検査前および検査中に機関がｔ１の時点まで駆動されたときにかかった負荷に対する温度の平均値に当たる排ガス温度となっていた。ｔ１の時点での噴射時間の短縮も、ｔ２の時点での噴射時間の延長も、シリンダー２の排ガス温度の変化を引き起こさない。以上の検査結果から、点火用流体燃料噴射装置１３は故障しているということが分かる。 FIG. 3 shows the course of the temperature of the exhaust gas discharged from the cylinder 2 during the execution of the inspection cycle of FIG. 2, which inspection was performed by the igniting fluid fuel injector 13 for ignition. At the start of measurement has been a exhaust gas temperature which corresponds to the average value of the temperature on applied when the engine is driven up to the point of t 1 in the same manner inspected before and testing load. Neither shortening the injection time at time t 1 nor extending the injection time at time t 2 causes a change in the exhaust gas temperature of the cylinder 2. From the above inspection results, it can be seen that the ignition fluid fuel injection device 13 has failed.

２ シリンダー
３ シリンダーヘッド
４ ピストン
５ コネクティングロッド
６ 燃料噴射装置
７ 燃料供給管
８ 燃料ポンプ
９ 第１燃焼室
１１ 第２燃焼室
１２ 接続通路
１３ 点火用流体燃料噴射装置
１４ 点火用流体燃料供給管
１６ 点火用流体燃料ポンプ
１７ 吸気弁
１８ 排気弁
２０ 混合気製造装置
２１ ガス供給管
２５ 分析装置
２６ 温度センサー 2 cylinder 3 cylinder head 4 piston 5 connecting rod 6 fuel injection device 7 fuel supply pipe 8 fuel pump 9 first combustion chamber 11 second combustion chamber 12 connection passage 13 ignition fluid fuel injection device 14 ignition fluid fuel supply tube 16 ignition Fluid fuel pump 17 Intake valve 18 Exhaust valve 20 Air-fuel mixture production device 21 Gas supply pipe 25 Analytical device 26 Temperature sensor

Claims (18)

多燃料機関の点火用流体燃料噴射装置のための検査方法であって、前記多燃料機関は、
液体燃料をシリンダー（２）の第１燃焼室（９）に供給するための第１供給装置（１０）と、
ガス状燃料を前記シリンダー（２）の前記第１燃焼室（９）に供給するための第２供給装置（１９）と、
点火用流体燃料を前記第１燃焼室（９）あるいは該第１燃焼室（９）と連通する第２燃焼室（１１）に供給するための、少なくとも１つの点火用流体燃料噴射装置（１３）を有する第３供給装置（１５）と、
前記多燃料機関の排ガス温度値を検出するための測定装置（２６）と、
該測定装置（２６）によって検出された排ガス温度値を分析するための分析装置（２５）と、
を有しており、
前記検査方法は、
ａ）液体燃料駆動において前記多燃料機関を駆動させ、少なくとも１つの前記点火用流体燃料噴射装置（１３）が、前記第１あるいは第２燃焼室（９，１１）に点火用流体燃料を噴射するステップと、
ｂ）１つあるいは複数の前記点火用流体燃料噴射装置（１３）の噴射時間および／または噴射量を変えるステップと、
ｃ）前記点火用流体燃料噴射装置（１３）の噴射時間および／または噴射量を変化させている間に前記測定装置（２６）によって検出された、排ガス温度値を分析するステップと、
を備えている、多燃料機関の点火用流体燃料噴射装置のための検査方法。 An inspection method for a fluid fuel injection device for ignition of a multi-fuel engine, wherein the multi-fuel engine comprises:
A first supply device (10) for supplying liquid fuel to the first combustion chamber (9) of the cylinder (2);
A second supply device (19) for supplying gaseous fuel to the first combustion chamber (9) of the cylinder (2);
At least one ignition fluid fuel injection device (13) for supplying ignition fluid fuel to the first combustion chamber (9) or the second combustion chamber (11) communicating with the first combustion chamber (9). A third supply device (15) having:
A measuring device (26) for detecting an exhaust gas temperature value of the multi-fuel engine;
An analyzer (25) for analyzing the exhaust gas temperature value detected by the measuring device (26);
Have
The inspection method is:
a) In the liquid fuel drive, the multi-fuel engine is driven, and at least one of the ignition fluid fuel injection devices (13) injects ignition fluid fuel into the first or second combustion chamber (9, 11). Steps,
b) changing the injection time and / or injection quantity of one or more of the ignition fluid fuel injectors (13);
c) analyzing the exhaust gas temperature value detected by the measuring device (26) while changing the injection time and / or the injection amount of the ignition fluid fuel injection device (13);
An inspection method for a fluid fuel injection device for ignition of a multi-fuel engine. 前記多燃料機関が、検査方法の実施の間、低負荷もしくは部分負荷の領域で駆動されることを特徴とする請求項１に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   2. The inspection method for a fluid fuel injection device for ignition of a multi-fuel engine according to claim 1, wherein the multi-fuel engine is driven in a low load or partial load region during execution of the inspection method. . 前記多燃料機関が、定格負荷の５から２５％の領域で駆動されることを特徴とする請求項２に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   3. The inspection method for a fluid fuel injection device for ignition of a multi-fuel engine according to claim 2, wherein the multi-fuel engine is driven in a range of 5 to 25% of a rated load. 前記多燃料機関が、ディーゼルサイクルにしたがって、液体燃料駆動で作動することを特徴とする請求項１から請求項３のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   4. The multi-fuel engine ignition fluid fuel injection device according to claim 1, wherein the multi-fuel engine is operated by liquid fuel drive according to a diesel cycle. 5. Inspection method. 液体燃料駆動における燃料としてディーゼル燃料が使用されることを特徴とする請求項１から請求項４のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   5. The inspection method for a fluid fuel injection device for ignition of a multi-fuel engine according to any one of claims 1 to 4, wherein diesel fuel is used as fuel in liquid fuel drive. ガス駆動のための点火用流体燃料として、液体燃料駆動のための燃料が使用されることを特徴とする請求項１から請求項５のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   6. The ignition fluid fuel for a multi-fuel engine according to any one of claims 1 to 5, wherein a fuel for driving a liquid fuel is used as the ignition fluid fuel for gas driving. Inspection method for injection device. 前記第２燃焼室（１１）が、前記第１燃焼室（９）の予燃焼室として形成され、かつ該第１燃焼室（９）に連結されていることを特徴とする請求項１から請求項６のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   The second combustion chamber (11) is formed as a precombustion chamber of the first combustion chamber (9) and is connected to the first combustion chamber (9). The inspection method for a fluid fuel injection device for ignition of a multi-fuel engine according to any one of items 6. 点火用流体燃料を前記第１燃焼室（９）に供給するための前記第３供給装置の前記点火用流体燃料噴射装置（１３）が、前記第１供給装置の燃料噴射装置（６）と一体的に形成されていることを特徴とする請求項１から請求項７のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   The ignition fluid fuel injection device (13) of the third supply device for supplying ignition fluid fuel to the first combustion chamber (9) is integrated with the fuel injection device (6) of the first supply device. The inspection method for a fluid fuel injection device for ignition of a multi-fuel engine according to any one of claims 1 to 7, wherein the inspection method is formed as a system. 前記測定装置（２６）が、前記多燃料機関の個々のシリンダーの排ガス温度値を検出することを特徴とする請求項１から請求項８のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   The multi-fuel engine ignition fluid according to any one of claims 1 to 8, wherein the measuring device (26) detects an exhaust gas temperature value of each cylinder of the multi-fuel engine. Inspection method for a fuel injection device. 前記測定装置（２６）が、シリンダーのほんの数ストローク後にすでに排ガス温度の変化を検出することを特徴とする請求項１から請求項９のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   The fluid fuel for ignition of a multi-fuel engine according to any one of claims 1 to 9, wherein the measuring device (26) detects a change in exhaust gas temperature already after only a few strokes of a cylinder. Inspection method for injection device. 前記ステップｂ）において噴射時間が延長され、その結果より多くの点火用流体燃料が前記燃焼室（９，１１）にもたらされることを特徴とする請求項１から請求項１０のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   11. The fuel cell according to claim 1, wherein the injection time is extended in step b), resulting in more ignition fluid fuel being delivered to the combustion chamber (9, 11). Inspection method for a fluid fuel injection device for ignition of a multi-fuel engine as described. 噴射開始を早め、および／あるいは噴射終了を遅らせることを特徴とする請求項１１に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   12. The inspection method for a fluid fuel injection device for ignition of a multi-fuel engine according to claim 11, wherein the start of injection is advanced and / or the end of injection is delayed. 前記ステップｂ）において噴射時間が短縮され、その結果より少ない点火用流体燃料が前記燃焼室（９，１１）にもたらされることを特徴とする請求項１から請求項１０のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   11. The fuel cell according to claim 1, wherein the injection time is shortened in step b), resulting in less ignition fluid fuel being introduced into the combustion chamber (9, 11). Method for a fluid fuel injection device for ignition of a multi-fuel engine. 噴射開始を遅らせ、および／あるいは噴射終了を早めることを特徴とする請求項１３に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   14. The inspection method for a fluid fuel injection device for ignition of a multi-fuel engine according to claim 13, wherein the start of injection is delayed and / or the end of injection is advanced. 前記点火用流体燃料噴射装置（１３）の噴射時間が、あらかじめ設定された検査サイクルに応じて変えられることを特徴とする請求項１から請求項１４のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   The multi-fuel engine according to any one of claims 1 to 14, wherein an injection time of the ignition fluid fuel injection device (13) is changed according to a preset inspection cycle. Inspection method for a fluid fuel injection device for ignition. ステップｂ）において、噴射される点火用流体燃料の量が、前記点火用流体燃料噴射装置（１３）を通る体積流量を変化させることによって変えられ、その結果より多くの点火用流体燃料あるいはより少ない点火用流体燃料が前記燃焼室（９，１１）にもたらされることを特徴とする請求項１から請求項１０のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   In step b), the amount of ignition fluid fuel injected is changed by changing the volume flow through the ignition fluid fuel injector (13), so that more or less ignition fluid fuel is produced. 11. A test for an ignition fluid fuel injection device of a multi-fuel engine according to any one of the preceding claims, characterized in that an ignition fluid fuel is provided to the combustion chamber (9, 11). Method. 前記点火用流体燃料噴射装置（１３）の体積流量が、あらかじめ設定された検査サイクルに応じて変えられることを特徴とする請求項１６に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   The ignition fluid fuel injection device for a multi-fuel engine according to claim 16, characterized in that the volume flow rate of the ignition fluid fuel injection device (13) is changed according to a preset inspection cycle. Inspection method. 個々の前記点火用流体燃料噴射装置（１３）が、次々に連続して検査されることを特徴とする請求項１から請求項１７のいずれか一項に記載の多燃料機関の点火用流体燃料噴射装置のための検査方法。   18. The fluid fuel for ignition of a multi-fuel engine according to any one of claims 1 to 17, characterized in that the individual fluid fuel injection devices (13) for ignition are continuously inspected one after another. Inspection method for injection device.
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CN101482066B (en) 2013-06-12
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