JP3774061B2 - Engine fuel supply control device - Google Patents

Engine fuel supply control device Download PDF

Info

Publication number
JP3774061B2
JP3774061B2 JP12575698A JP12575698A JP3774061B2 JP 3774061 B2 JP3774061 B2 JP 3774061B2 JP 12575698 A JP12575698 A JP 12575698A JP 12575698 A JP12575698 A JP 12575698A JP 3774061 B2 JP3774061 B2 JP 3774061B2
Authority
JP
Japan
Prior art keywords
fuel
injector
engine
gasoline
gaseous fuel
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.)
Expired - Fee Related
Application number
JP12575698A
Other languages
Japanese (ja)
Other versions
JPH11324749A (en
Inventor
光夫 小川
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.)
Aisan Industry Co Ltd
Original Assignee
Aisan Industry Co Ltd
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 Aisan Industry Co Ltd filed Critical Aisan Industry Co Ltd
Priority to JP12575698A priority Critical patent/JP3774061B2/en
Publication of JPH11324749A publication Critical patent/JPH11324749A/en
Application granted granted Critical
Publication of JP3774061B2 publication Critical patent/JP3774061B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • F02D19/0613—Switch-over from one fuel to another
    • F02D19/0615—Switch-over from one fuel to another being initiated by automatic means, e.g. based on engine or vehicle operating conditions
    • 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
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0284—Arrangement of multiple injectors or fuel-air mixers per combustion chamber
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は気体燃料と液体燃料を用いるエンジンの燃料供給制御装置に関する。
【０００２】
【従来の技術】
気体燃料供給装置と液体燃料供給装置とを備えた内燃機関の燃料供給制御装置が特開平７−３４９１４号公報に開示されている。
【０００３】
この従来技術では空燃比制御等の補正ＣＮＧ（圧縮天然ガス）燃料をガソリン燃料供給装置を構成する燃料噴射弁（インジェクタ）から噴射供給するように構成している。ミキサ方式でキャブレタのスロットル弁下流に燃料噴射弁を各気筒毎に配置している。ＣＮＧ燃料はスロットル弁の上流に設けられたミキサに供給される。
【０００４】
ガス（ＣＮＧ）燃料供給時においても、燃料噴射弁に潤滑用の液体（ガソリン）燃料を少量供給するようにして、燃料噴射弁のスティック（固着）やスカップ（凝着）等を防止することで燃料噴射弁の耐久性の向上を図っている。
【０００５】
【発明が解決しようとする課題】
前記従来の技術では、インジェクタの潤滑用に、ＣＮＧ燃料供給時においても少量のガソリン燃料を供給しているが、耐久性の向上は図れるものの、エンジンの始動性は向上せず、特に極低温時における始動性が悪いという問題点があった。
【０００６】
そこで本発明はかかる問題点を解消できるエンジンの燃料供給制御装置を提供することを目的とする。
【０００７】
【課題を解決するための手段】
前記目的を達成するために、請求項１の発明は、気体燃料と液体燃料の両燃料に共用のインジェクタを備えて燃料を気筒に噴射する燃料供給制御装置において、
各気筒毎にインジェクタを設けると共に、吸気マニホールドの上流に設けたベンチュリに気体燃料を供給するアナログ弁と該アナログ弁を操作するモータを設け、
エンジンの始動時にはインジェクタにガソリンを供給し、その後気体燃料に切り替え、
エンジン運転状態がアイドル又は軽負荷時はインジェクタのみで気体燃料を供給し、中高負荷時は予め定めた基本制御マップに基づいてステップモータを制御してベンチュリから付加的に気体燃料を供給すると共に排気系のＯ 2 センサの信号に基づいてＥＣＵによりインジェクタを駆動して空燃比を制御することを特徴とするエンジンの燃料供給制御装置である。
【０００８】
始動時に供給するガソリン燃料がエンジンの始動性、特に極低温時の始動性を向上させる。
また、各気筒に配置したインジェクタが応答性と空燃比の制御を向上させ、アイドル空燃比無調整化が可能となる。そして、中高負荷時には、予めエンジンの回転数等に対応して定めた基本制御マップに基づいてモータを制御してベンチュリからも気体燃料を供給する。このときインジェクタはＥＣＵによって空燃比を理論空燃比に制御する。
【０００９】
請求項２の発明は、請求項１のエンジンの燃料供給制御装置において、インジェクタへのガソリン燃料通路と気体燃料通路とを切替制御する燃料切替弁を設け、スタータＯＮでガソリン燃料通路を開いて気体燃料通路を閉じ、スタータＯＦＦで、かつ、所定の水温以上で気体燃料通路を開いてガソリン燃料通路を閉じることを特徴とするものである。
燃料切替弁をスタータのＯＮ−ＯＦＦと連動させ、かつ、水温センサの出力値によってガソリン燃料と気体燃料を簡単に切り替えられ、エンジン始動時のみガソリン燃料を供給する。
【００１２】
【発明の実施の形態】
次に本発明の好ましい実施の形態を図１の実施例に従って説明する。
４気筒のエンジン１の排気マニホールド２の下流にはエミッション対策としての触媒３が設けてある。Ｏ2 センサ４は排気中の酸素濃度（空燃比）を検出して後述するＥＣＵ（電子制御ユニット）５に入力する。
【００１３】
エンジン１の各気筒にはインジェクタ６が設けられており、図では４気筒エンジンで合計４個設けられている。これらのインジェクタはＥＣＵ５により駆動される。インジェクタ６と吸気マニホールド７の上流にはスロットルバルブ８が、さらに上流にベンチュリ９が設けてある。
【００１４】
車両に搭載されたボンベ１０内には、気体燃料源としてのＣＮＧ（圧縮天然ガス）又はＬＰＧ（液化石油ガス）が充てんされており、ボンベ１０内のガスは緊急遮断弁１１を経てＰＴＣヒータ（正温度係数ヒータ）１２で加温され、レギュレータ１３で減圧気化される。
【００１５】
レギュレータ１３は１次減圧室１３ａと２次減圧室１３ｂを有し、１次減圧室１３ａで調圧された気体燃料は気体燃料通路１４に挿入した燃料切替弁１５を介して各気筒のインジェクタ６へ供給される。また、レギュレータ１３の２次減圧室１３ｂで調圧された気体燃料はメイン燃料用ニードルとしてのアナログ弁１６を通じて前記ベンチュリ９へ供給される。アナログ弁１６はＥＣＵ５で制御されるステップモータ１７で操作されて進退し、２次減圧室１３ｂからベンチュリ９へ吐出する気体燃料量を加減する。
【００１６】
液体燃料源としてのガソリンタンク１８からのガソリンは燃料ポンプ１９からガソリン燃料通路２０に挿入した燃料切替弁１５を介して各気筒のインジェクタ６へ供給される。２２はエンジンの冷却水の温度を計測する水温センサである。また、２３，２４は周知の回転数センサと負圧センサである。
【００１７】
燃料切替弁１５はスタータスイッチ２１のＯＮ−ＯＦＦに連動し、スイッチ２１を閉じてスタータＯＮになるとガソリン燃料通路２０を開き気体燃料通路１４を閉じるように作動する。そして、スイッチ２１が開いてスタータＯＦＦになり、かつ、水温が所定温度以上になると、ガソリン燃料通路２０を閉じ気体燃料通路１４を開く。なお、水温の所定温度は３０℃以上に設定される。
【００１８】
図１の実施例で、エンジン始動時スタータスイッチ２１を閉じると、燃料切替弁１５を介して各気筒へインジェクタ６からガソリンが噴射されて確実にエンジンを始動させることができる。
【００１９】
その後、スタータスイッチ２１を開き、かつ、水温が所定温度以上になると燃料切替弁１５が切り替わって、ガソリンに代わって１次減圧室１３ａからの気体燃料がインジェクタ６に供給されて各気筒に噴射される。
【００２０】
アイドリング時など軽負荷時は、各気筒のインジェクタ６のみで燃料が供給される。中高負荷時には、ＥＣＵ５がステップモータ１７を駆動してアナログ弁１６を開きベンチュリ９からも併せて気体燃料を供給する。ＥＣＵ５はエンジン１の回転数等に応じて予め定めた基本マップに基づいてステップモータ１７を駆動制御して、ベンチュリからの付加燃料量を制御する。
【００２１】
この基本マップはＥＣＵ５内のメモリに格納しておくものである。
また、中高負荷時には、Ｏ2 センサ４の信号に基づいてＥＣＵ５によりインジェクタ６を駆動して空燃比を理想空燃比に制御する。
【００２２】
【発明の効果】
本発明のエンジンの燃料供給制御装置は上述のように構成されていて、始動をガソリンで行なうことで低温時における気体燃料の難点を克服してエンジンの始動性を向上でき、特に極低温でその効果が大きい。
更にアイドル空燃比の無調整が可能となり、空燃比制御性が向上するので、燃費、ドラビリ、出力の向上とエミッションの改善ができる。
【００２３】
また、請求項２の発明では、更に、簡単な構成で上記の始動性の改善を実現できる。
【図面の簡単な説明】
【図１】本発明の実施例にかかる全体構成図である。
【符号の説明】
１ エンジン
２ 排気マニホールド
４ Ｏ2 センサ
５ ＥＣＵ
６ インジェクタ
７ 吸気マニホールド
８ スロットルバルブ
９ ベンチュリ
１０ ボンベ
１３ レギュレータ
１４ 気体燃料通路
１５ 燃料切替弁
１６ アナログ弁
１７ ステップモータ
１８ ガソリンタンク
１９ 燃料ポンプ
２０ ガソリン燃料通路
２１ スタータスイッチ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel supply control device for an engine using gaseous fuel and liquid fuel.
[0002]
[Prior art]
Japanese Patent Laid-Open No. 7-34914 discloses a fuel supply control device for an internal combustion engine provided with a gaseous fuel supply device and a liquid fuel supply device.
[0003]
In this prior art, correction CNG (compressed natural gas) fuel such as air-fuel ratio control is injected and supplied from a fuel injection valve (injector) constituting a gasoline fuel supply device. A fuel injection valve is arranged for each cylinder downstream of the carburetor throttle valve in a mixer system. CNG fuel is supplied to a mixer provided upstream of the throttle valve.
[0004]
Even when supplying gas (CNG) fuel, a small amount of lubricating liquid (gasoline) fuel is supplied to the fuel injection valve to prevent sticking (sticking) and scoop (adhesion) of the fuel injection valve. The durability of the fuel injection valve is improved.
[0005]
[Problems to be solved by the invention]
In the prior art, a small amount of gasoline fuel is supplied for the lubrication of the injector even when CNG fuel is supplied. However, although the durability can be improved, the engine startability is not improved, especially at extremely low temperatures. There was a problem of poor startability.
[0006]
Therefore, an object of the present invention is to provide an engine fuel supply control device that can eliminate such problems.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is a fuel supply control apparatus comprising a common injector for both gaseous fuel and liquid fuel and injecting fuel into a cylinder.
In addition to providing an injector for each cylinder, an analog valve for supplying gaseous fuel to a venturi provided upstream of the intake manifold and a motor for operating the analog valve are provided.
When starting the engine, supply gasoline to the injector, then switch to gaseous fuel,
When the engine is idle or lightly loaded, gaseous fuel is supplied only by the injector, and when the engine is operating at medium and high loads, the stepper motor is controlled based on a predetermined basic control map to additionally supply gaseous fuel from the venturi and exhaust. An engine fuel supply control apparatus that controls an air-fuel ratio by driving an injector by an ECU based on a signal from a system O 2 sensor .
[0008]
The gasoline fuel supplied at the start improves the startability of the engine, particularly at extremely low temperatures.
In addition, the injectors arranged in the respective cylinders improve responsiveness and control of the air-fuel ratio, and the idle air-fuel ratio can be eliminated. At medium and high loads, the fuel is supplied from the venturi by controlling the motor based on a basic control map determined in advance corresponding to the engine speed and the like. At this time, the injector controls the air-fuel ratio to the stoichiometric air-fuel ratio by the ECU.
[0009]
According to a second aspect of the present invention, there is provided a fuel supply control device for an engine according to the first aspect, wherein a fuel switching valve for switching between a gasoline fuel passage and a gaseous fuel passage to the injector is provided, and when the starter is turned on, the gasoline fuel passage is opened to make the gas The fuel passage is closed, the starter is OFF, and the gas fuel passage is opened at a predetermined water temperature or higher to close the gasoline fuel passage.
The fuel switching valve is interlocked with the starter ON-OFF, and the gasoline fuel and the gaseous fuel can be easily switched by the output value of the water temperature sensor, and the gasoline fuel is supplied only when the engine is started.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the present invention will be described with reference to the embodiment of FIG.
A catalyst 3 as an emission countermeasure is provided downstream of the exhaust manifold 2 of the four-cylinder engine 1. The O 2 sensor 4 detects the oxygen concentration (air-fuel ratio) in the exhaust gas and inputs it to an ECU (electronic control unit) 5 described later.
[0013]
In each cylinder of the engine 1, an injector 6 is provided. In the figure, a total of four injectors are provided for a four-cylinder engine. These injectors are driven by the ECU 5. A throttle valve 8 is provided upstream of the injector 6 and the intake manifold 7, and a venturi 9 is provided further upstream.
[0014]
The cylinder 10 mounted on the vehicle is filled with CNG (compressed natural gas) or LPG (liquefied petroleum gas) as a gaseous fuel source, and the gas in the cylinder 10 passes through an emergency shut-off valve 11 to be a PTC heater ( Heated by a positive temperature coefficient heater (12) and vaporized under reduced pressure by a regulator (13).
[0015]
The regulator 13 has a primary decompression chamber 13a and a secondary decompression chamber 13b, and the gaseous fuel regulated in the primary decompression chamber 13a passes through the fuel switching valve 15 inserted in the gaseous fuel passage 14 and is injected into the injector 6 of each cylinder. Supplied to. The gaseous fuel regulated in the secondary decompression chamber 13b of the regulator 13 is supplied to the venturi 9 through an analog valve 16 as a main fuel needle. The analog valve 16 is operated by a step motor 17 controlled by the ECU 5 to advance and retreat, thereby adjusting the amount of gaseous fuel discharged from the secondary decompression chamber 13b to the venturi 9.
[0016]
Gasoline from the gasoline tank 18 as a liquid fuel source is supplied from the fuel pump 19 to the injector 6 of each cylinder through the fuel switching valve 15 inserted into the gasoline fuel passage 20. A water temperature sensor 22 measures the temperature of the engine coolant. Reference numerals 23 and 24 are known rotational speed sensors and negative pressure sensors.
[0017]
The fuel switching valve 15 is interlocked with the ON / OFF of the starter switch 21 and operates to open the gasoline fuel passage 20 and close the gaseous fuel passage 14 when the switch 21 is closed and the starter is turned ON. When the switch 21 is opened and the starter is turned off and the water temperature is equal to or higher than a predetermined temperature, the gasoline fuel passage 20 is closed and the gas fuel passage 14 is opened. In addition, the predetermined temperature of water temperature is set to 30 degreeC or more.
[0018]
In the embodiment of FIG. 1, when the starter switch 21 at the time of starting the engine is closed, gasoline is injected from the injector 6 to each cylinder via the fuel switching valve 15 so that the engine can be started reliably.
[0019]
After that, when the starter switch 21 is opened and the water temperature becomes equal to or higher than the predetermined temperature, the fuel switching valve 15 is switched, and the gaseous fuel from the primary decompression chamber 13a is supplied to the injector 6 instead of gasoline and injected into each cylinder. The
[0020]
At a light load such as idling, the fuel is supplied only by the injector 6 of each cylinder. During medium and high loads, the ECU 5 drives the step motor 17 to open the analog valve 16 and supply gaseous fuel also from the venturi 9. The ECU 5 controls the amount of fuel added from the venturi by drivingly controlling the step motor 17 based on a predetermined basic map according to the rotational speed of the engine 1 or the like.
[0021]
This basic map is stored in a memory in the ECU 5.
Further, during medium and high loads, the ECU 6 drives the injector 6 based on the signal from the O 2 sensor 4 to control the air / fuel ratio to the ideal air / fuel ratio.
[0022]
【The invention's effect】
The fuel supply control device for an engine of the present invention is configured as described above. By starting with gasoline, the problem of gaseous fuel at low temperatures can be overcome and engine startability can be improved. Great effect.
Further, no adjustment of the idle air-fuel ratio is possible, and the air-fuel ratio controllability is improved, so that fuel consumption, drivability, output, and emission can be improved.
[0023]
Further, in the invention of claim 2, the startability can be improved with a simple configuration .
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram according to an embodiment of the present invention.
[Explanation of symbols]
1 Engine 2 Exhaust manifold 4 O 2 sensor 5 ECU
6 Injector 7 Intake manifold 8 Throttle valve 9 Venturi 10 Cylinder 13 Regulator 14 Gas fuel passage 15 Fuel switching valve 16 Analog valve 17 Step motor 18 Gasoline tank 19 Fuel pump 20 Gasoline fuel passage 21 Starter switch

Claims (2)

気体燃料と液体燃料の両燃料に共用のインジェクタを備えて燃料を気筒に噴射する燃料供給制御装置において、
各気筒毎にインジェクタを設けると共に、吸気マニホールドの上流に設けたベンチュリに気体燃料を供給するアナログ弁と該アナログ弁を操作するモータを設け、
エンジンの始動時にはインジェクタにガソリンを供給し、その後気体燃料に切り替え、
エンジン運転状態がアイドル又は軽負荷時はインジェクタのみで気体燃料を供給し、中高負荷時は予め定めた基本制御マップに基づいてステップモータを制御してベンチュリから付加的に気体燃料を供給すると共に排気系のＯ 2 センサの信号に基づいてＥＣＵによりインジェクタを駆動して空燃比を制御することを特徴とするエンジンの燃料供給制御装置。In a fuel supply control device that includes a common injector for both gaseous fuel and liquid fuel and injects fuel into a cylinder,
In addition to providing an injector for each cylinder, an analog valve for supplying gaseous fuel to a venturi provided upstream of the intake manifold and a motor for operating the analog valve are provided.
When starting the engine, supply gasoline to the injector, then switch to gaseous fuel,
When the engine is idle or lightly loaded, gaseous fuel is supplied only by the injector, and when the engine is operating at medium and high loads, the stepper motor is controlled based on a predetermined basic control map to additionally supply gaseous fuel from the venturi and exhaust. A fuel supply control device for an engine, wherein an ECU controls an air-fuel ratio by driving an injector based on a signal from an O 2 sensor of the system. インジェクタへのガソリン燃料通路と気体燃料通路とを切替制御する燃料切替弁を設け、スタータＯＮでガソリン燃料通路を開いて気体燃料通路を閉じ、スタータＯＦＦで、かつ所定の水温以上で気体燃料通路を開いてガソリン燃料通路を閉じることを特徴とする請求項１記載のエンジンの燃料供給制御装置。 A fuel switching valve that switches between the gasoline fuel passage and the gaseous fuel passage to the injector is provided. When the starter is on, the gasoline fuel passage is opened and the gaseous fuel passage is closed. 2. The fuel supply control device for an engine according to claim 1, wherein the fuel fuel passage is opened and the gasoline fuel passage is closed.
JP12575698A 1998-05-08 1998-05-08 Engine fuel supply control device Expired - Fee Related JP3774061B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12575698A JP3774061B2 (en) 1998-05-08 1998-05-08 Engine fuel supply control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12575698A JP3774061B2 (en) 1998-05-08 1998-05-08 Engine fuel supply control device

Publications (2)

Publication Number Publication Date
JPH11324749A JPH11324749A (en) 1999-11-26
JP3774061B2 true JP3774061B2 (en) 2006-05-10

Family

ID=14918045

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12575698A Expired - Fee Related JP3774061B2 (en) 1998-05-08 1998-05-08 Engine fuel supply control device

Country Status (1)

Country Link
JP (1) JP3774061B2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020020570A (en) * 2000-09-09 2002-03-15 이병옥 Pressure control system of lpg bombe
KR20010025669A (en) * 2001-01-16 2001-04-06 김효영 LPG car fuel autoswitch over unit
DE10121609B4 (en) * 2001-05-04 2006-04-06 Dirk Vialkowitsch Method for setting a particular retrofittable control device
WO2004029438A1 (en) * 2002-09-24 2004-04-08 Engine Control Technology, Llc Methods and apparatus for operation of multiple fuel engines
KR100716314B1 (en) * 2005-08-30 2007-05-11 현대자동차주식회사 A method for detecting LPG switch line disconnection
KR100771824B1 (en) 2006-09-26 2007-10-30 지멘스 오토모티브 주식회사 Apparatus for supplying lpg fuel and gasoline fuel of lpi car
CN101858260A (en) * 2010-05-06 2010-10-13 长治市新能清洁燃料有限公司 Cold start device of methanol automobile
JP5813483B2 (en) * 2011-11-30 2015-11-17 愛三工業株式会社 Fuel supply control device for bi-fuel internal combustion engine and fuel switching method in bi-fuel internal combustion engine
JP5983133B2 (en) * 2012-07-20 2016-08-31 株式会社デンソー Fuel injection valve
DE102016202612A1 (en) * 2016-02-19 2017-08-24 Volkswagen Aktiengesellschaft Internal combustion engine and method for operating an internal combustion engine

Also Published As

Publication number Publication date
JPH11324749A (en) 1999-11-26

Similar Documents

Publication Publication Date Title
EP0828938B1 (en) Method and apparatus for clean cold starting of internal combustion engines
US6874467B2 (en) Fuel delivery system for an internal combustion engine
US5549083A (en) Method and apparatus for clean cold starting of internal combustion engines
JP3774061B2 (en) Engine fuel supply control device
KR19990067079A (en) Control device of cylinder internal combustion engine
JP2003065112A (en) Fuel supply controller for engine
JPH06123248A (en) Fuel switching method for gaseous fuel-liquid fuel compatible engine
JP2007255360A (en) Engine control device
JP3708164B2 (en) Engine start control device
KR20010023298A (en) Conversion system with electronic controller for utilization of gaseous fuels in spark ignition engines
JPH07253051A (en) Fuel vaporizing device for gaseous fuel engine
JPH06257479A (en) Control device for internal combustion engine
JPH0643814B2 (en) Dual fuel switching control method and device
JP2002349305A (en) Electronic controller for internal combustion engine
KR100846426B1 (en) Fuel supply system
JPS58206841A (en) Starting device for lpg engine
KR19980052773U (en) LPG vaporizer for improving low temperature start-up
KR910008911B1 (en) Air-fuel ratio control method for liquid gas
JP3644822B2 (en) Gas engine ignition device
JP2003074415A (en) Fuel supply method in internal combustion engine and its device
US4428347A (en) Internal combustion engine
KR200359817Y1 (en) Structure for directly injecting lp gas into the manifold
KR100189435B1 (en) Heating device for intake gas at cold starting of a gasoline engine
KR910008910B1 (en) Air fuel ratio control method for liquid gas engine
KR20110072701A (en) Starting performance improving system in lpg engine

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20051101

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20051122

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20051227

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20060124

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20060216

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees