JPS6098133A - Throttle valve open/close controller - Google Patents

Throttle valve open/close controller

Info

Publication number
JPS6098133A
JPS6098133A JP20465483A JP20465483A JPS6098133A JP S6098133 A JPS6098133 A JP S6098133A JP 20465483 A JP20465483 A JP 20465483A JP 20465483 A JP20465483 A JP 20465483A JP S6098133 A JPS6098133 A JP S6098133A
Authority
JP
Japan
Prior art keywords
throttle valve
actuator
valve
closing
pulp
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.)
Pending
Application number
JP20465483A
Other languages
Japanese (ja)
Inventor
Yuuki Ejiri
裕城 江尻
Hiroshi Kamifuji
上藤　博司
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP20465483A priority Critical patent/JPS6098133A/en
Publication of JPS6098133A publication Critical patent/JPS6098133A/en
Pending legal-status Critical Current

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
    • F02M3/00—Idling devices for carburettors
    • F02M3/06—Increasing idling speed
    • F02M3/07—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/08—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the pneumatic type

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

PURPOSE:To reduce the size of valve opening regulating actuator thus to assure the returning force of a throttle valve providing the actuator dedicated for closing of the valve independently from the valve opening regulating actuator. CONSTITUTION:An actuator 4 dedicated for closing of a throttle valve is provided together with a throttle valve opening regulating actuator 2 in a throttle valve 1 in engine supply system. A control system 3 will control the actuator 2 while simultaneously drive a solenoid valve 7 to control supply of suction negative pressure to the actuator 4 thus to control the valve 1. Consequently, a strong valve returning spring is not required resulting in reduction of the size of actuator 2.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、絞り弁開閉制御装置、さらに詳細には、燃料
と空気との混合気をシリンダに供給する場合（ガノリン
機関の場合）や、空気のみをシリンダに供給する場合（
ディーゼル機関の場合）のように、内燃機関に燃料と空
気との混合気、あるいは空気のみを供給する場合に、そ
の吸気系の途中に設けられている絞シ弁の開度を調整す
る絞シ弁開閉制御装置の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a throttle valve opening/closing control device, and more specifically, to a device for controlling the opening and closing of a throttle valve, and more specifically, for supplying a mixture of fuel and air to a cylinder (in the case of a ganolin engine), When only feeding the cylinder (
When supplying a mixture of fuel and air, or only air, to an internal combustion engine (as in the case of diesel engines), a throttle valve is used to adjust the opening of the throttle valve installed in the middle of the intake system. This invention relates to improvement of a valve opening/closing control device.

〔発明の背景〕[Background of the invention]

内燃機関に燃料と空気との混合気、あるいは空気のみを
供給する場合、従来は、特開昭５６−１５４１４１号公
報にあるように吸気系の途中に設けられている絞り弁の
閉鎖をばね力を利用しておこなっているが、絞多弁の開
度が太きぐなるほど、その閉鎖トルクも大きくなｐ１絞
シ弁開度調整用のアクチュエータを大型化せざるを得す
、絞り弁を閉鎖する方向のばね力を小さくすると、絞り
弁の戻シネ足につながる不具合を生じる。When supplying a mixture of fuel and air or only air to an internal combustion engine, conventionally, a spring force was used to close a throttle valve provided in the middle of the intake system, as disclosed in Japanese Patent Application Laid-Open No. 154141/1983. However, the wider the opening of the throttle valve, the greater the closing torque.The actuator for adjusting the opening of the throttle valve must be made larger, and the direction of closing the throttle valve is increased. If the spring force is reduced, a problem will occur that will lead to the throttle valve returning to its original position.

〔発明の目的〕[Purpose of the invention]

本発明は、以上の点を考慮してなされたものであって、
その目的とするところは、絞シ弁開度調薬用のアクチュ
エータを小型化しても、絞シ弁の戻シネ足をきたすこと
のない、実用に供して好適な内燃機関の絞シ弁開閉制御
装置を提供しようとするものである。The present invention has been made in consideration of the above points, and includes:
The purpose is to create a throttle valve opening/closing control system for an internal combustion engine that is suitable for practical use and does not cause the throttle valve to return even if the actuator for adjusting the throttle valve opening is made smaller. This is what we are trying to provide.

〔発明の概要〕[Summary of the invention]

上記目的を達成するため、本発明は、絞シ弁と、当該絞
υ弁の開度を調整するアクチュエータとを備えてなる絞
シ弁開閉制御装置において、上記絞υ弁開度調整用アク
チュエータとは別異に、絞り弁の開度調整動作にフリー
の状態で追従する絞シ弁閉鎖専用アクチュエータを付設
してなることを特徴とするものである。In order to achieve the above object, the present invention provides a throttle valve opening/closing control device comprising a throttle valve and an actuator for adjusting the opening of the throttle υ valve. This is different in that it is equipped with an actuator dedicated to closing the throttle valve, which freely follows the opening adjustment operation of the throttle valve.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明を、ガソリン機関に適用した場合を例にと
シ、第１図の実施例にもとづいて説明すると、１は給気
系の途中に設けられた絞り弁、〉は絞シ弁１の開度を調
整するアクチュエータを示し、アクチュエータ２は、コ
ントローラ３からの指令により、リンク機構を介して絞
シ弁１の開度を調整する。４はダイアクラム４ａを備え
た絞シ弁閉鎖専用のアクチュエータで、ダイアクラム４
ａによって仕切られている一方のチャンバ５は、大気に
開放されており、他方のチーヤンバ６は、ソレノイドバ
ルブ７の流体通路８あるいは９を介し、バルブ７ａのシ
ート穴１０あるいはバルブ７ｂのシート穴１１と選択的
に連通ずるよう構成されている。ソレノイドパルプ７は
、絞）弁開度調整用アクチュエータ２と同様、コントロ
ーラ３からの指令をうけるものであって、当該ソレノイ
ドノ（ルプ７は、絞シ弁開度調整用アクチュエータ２の
作動時にオンし、バルブ７ａを開いて当該）（ルブ７ａ
のシート穴１０を大気開放とするものである。Hereinafter, the present invention will be explained based on the embodiment shown in Fig. 1, taking as an example the case where the present invention is applied to a gasoline engine. The actuator 2 adjusts the opening degree of the throttle valve 1 via a link mechanism in response to a command from the controller 3. 4 is an actuator dedicated to closing the throttle valve, which is equipped with a diaphragm 4a;
One chamber 5 partitioned by a is open to the atmosphere, and the other chamber 6 is connected to the seat hole 10 of the valve 7a or the seat hole 11 of the valve 7b through the fluid passage 8 or 9 of the solenoid valve 7. It is configured to selectively communicate with. The solenoid pulp 7, like the throttle valve opening adjustment actuator 2, receives a command from the controller 3, and the solenoid pulp 7 is turned on when the throttle valve opening adjustment actuator 2 is operated. Then open the valve 7a to open the valve 7a.
The seat hole 10 is opened to the atmosphere.

また、ソレノイドパルプ７は、絞り弁開度調整用アクチ
ュエータ２にコントローラ３からの入力が零となった場
合にオフしてバルブ７ａを閉じ、）くルプ７ｂを開いて
当該バルブ７ｂのシート穴１１をインテークマニホール
ドに連通ずるものである。In addition, when the input from the controller 3 to the throttle valve opening adjustment actuator 2 becomes zero, the solenoid pulp 7 is turned off to close the valve 7a, and opens the coil 7b to close the seat hole 11 of the valve 7b. It communicates with the intake manifold.

以上の構成において、絞り弁１は、通常、コントローラ
３からの指令でコントロールされるアクチュエータ２に
よってのみ開［調整されるものであシ、機関の停止に際
し、アクチュエータ２に対するコントローラ３からの入
力が零となつ７’（場合、当該アクチュエータ２はフリ
ーの状態となる。また、ソレノイドパルプ７は、アクチ
ュエータ２の作動時にオンし、バルブ７ａのノート穴１
０を大気開放し、流体通路８を介して絞シ弁閉鎖専用ア
クチュエータ４のチャンバ６内を大気圧と同じ状態に保
つため、ダイアフラム４ａは、絞シ弁ｌの動作にフリー
の状態で追従する。In the above configuration, the throttle valve 1 is normally opened (adjusted) only by the actuator 2 controlled by a command from the controller 3, and when the engine is stopped, the input from the controller 3 to the actuator 2 is zero. 7', the actuator 2 is in a free state. Also, the solenoid pulp 7 is turned on when the actuator 2 is operated, and the note hole 1 of the valve 7a is turned on.
0 to the atmosphere and maintain the chamber 6 of the actuator 4 dedicated to closing the throttle valve 4 at the same pressure as the atmospheric pressure via the fluid passage 8, the diaphragm 4a follows the operation of the throttle valve l in a free state. .

絞り弁開度調整用アクチュエータ２にコントローラ３か
ら入力がない場合には、ソレノイドパルプ７もオフし、
バルブ７ａを閉じてバルブ７ｂを開き、バルブ７ｂのシ
ート穴１１をインテークマニホールドに連通ずる。した
がって、絞シ弁閉鎖専用アクチュエータ４のチャンバ６
内は、流体通路９を介してインテークマニホールド内と
同じ負圧の状態に保たれ、ダイアフラム４ａはチャンバ
６側に引かれ、絞シ弁１を閉じるものであって、このと
き絞り弁開度調整用アクチュエータ２はフリーの状態に
あるため、絞り弁１の閉動作に追従する。When there is no input from the controller 3 to the throttle valve opening adjustment actuator 2, the solenoid pulp 7 is also turned off,
Valve 7a is closed and valve 7b is opened to communicate the seat hole 11 of valve 7b with the intake manifold. Therefore, the chamber 6 of the actuator 4 dedicated to closing the throttle valve
The inside is maintained at the same negative pressure as the inside of the intake manifold via the fluid passage 9, and the diaphragm 4a is pulled toward the chamber 6 to close the throttle valve 1. At this time, the throttle valve opening is adjusted. Since the actuator 2 is in a free state, it follows the closing operation of the throttle valve 1.

また、通常運転時、絞シ弁１を閉じ側に動作させるにあ
た９、絞シ弁開度調整用アクチュエータ２のみで絞シ弁
１を閉じることができない場合は、コントローラ３から
の指令によってソレノイドパルプ７をオフし、バルブ７
ａを閉じてバルブ７ｂを開くことによシ、絞シ弁閉鎖専
用アクチュエータ４のチャンバ６内を負圧にしてダイア
フラム４ａをチャンバ６側に引き、絞り弁１の閉じ動作
をアシストすることもできる。In addition, during normal operation, when the throttle valve 1 cannot be closed only by the throttle valve opening adjustment actuator 2, when the throttle valve 1 is moved to the closing side, a command from the controller 3 is used. Turn off the solenoid pulp 7 and turn off the valve 7.
By closing the valve 7a and opening the valve 7b, the chamber 6 of the actuator 4 dedicated to closing the throttle valve is made negative pressure, and the diaphragm 4a is pulled toward the chamber 6, thereby assisting the closing operation of the throttle valve 1. .

次に、本発明を、過給機料ディーゼル（幾関に適用した
場合を例にとシ、第２図の実施例にもとづいて説明する
と、１は給気系の途中に設けられた絞シ弁、２は絞シ弁
１の開度を調整するアクチュエータを示し、アクテュエ
ータ２は、コントローラ３からの指令によシ、リンク機
構を介して絞シ弁ｌの開度を調整する。４はダイアフラ
ム４ａｆ：備えた絞シ弁閉鎖尋用のアクチュエータで、
ダイアフラム４ａによって仕切られている一方のチャン
バ５は、改述するソレノイドパルプ７のバルブボックス
７Ｃと流体通路１２を介して連通ずるよう構成されてい
る。また、パルプボックス７Ｃは、流体通路１２と分岐
した流体通路１３　Ｆ、？介し−Ｃ紋シ弁１の上流側１
４とも連通するよう構成されでいる。他方、絞ル弁閉鎖
専用アクチュエータ４のチャンバ６は、ソレノイドパル
プ７の流体通路８あるいは９を介し、バルブ７ａのシー
ト穴ｌＯあるいはバルブ７ｂのシート穴１１と選択的に
連通するよう構成されている。ソレノイドパルプ７は、
絞シ弁開度調整用アクチュエータ２と同様、コントロー
ラ３からの指令をうけるものであって、当該ソレノイド
パルプ７は、絞シ弁開度調整用アクチュエータ２の作動
時にオンしてパルプ７ａを開く。したがって、パルプ７
ａのシー）穴１０を介して絞シ弁１の上流側１４とアク
チュエータ４のチャンバ５．６とが連通ずる。また、ソ
レノイドパルプ７は、絞シ弁開度調整用アクチュエータ
２にコントローラ３からの入力が零となった場合にオフ
してバルブ７ａｆ閉じ、パルプ７ｂｅ開いて当該パルプ
７ｂのシート穴１１を、流体通路１５を介して絞シバル
ブ１の下流側１ｂに連通ずるものである。Next, the present invention will be explained based on the embodiment shown in FIG. 2, taking as an example the case where the present invention is applied to a supercharger diesel engine. The valve 2 indicates an actuator that adjusts the opening degree of the throttle valve 1, and the actuator 2 adjusts the opening degree of the throttle valve l according to a command from the controller 3 via a link mechanism. 4 is a diaphragm. 4af: Equipped with an actuator for closing the throttle valve,
One chamber 5 partitioned by a diaphragm 4a is configured to communicate with a valve box 7C of a solenoid pulp 7, which will be described later, via a fluid passage 12. Further, the pulp box 7C has a fluid passage 13F, which is branched from the fluid passage 12. Intermediate - Upstream side 1 of C-shaped valve 1
It is configured to communicate with 4. On the other hand, the chamber 6 of the actuator 4 dedicated to closing the throttle valve is configured to selectively communicate with the seat hole IO of the valve 7a or the seat hole 11 of the valve 7b via the fluid passage 8 or 9 of the solenoid pulp 7. . Solenoid pulp 7 is
Like the throttle valve opening adjustment actuator 2, it receives a command from the controller 3, and the solenoid pulp 7 is turned on when the throttle valve opening adjustment actuator 2 is activated to open the pulp 7a. Therefore, pulp 7
a) The upstream side 14 of the throttle valve 1 and the chamber 5.6 of the actuator 4 communicate via the hole 10. Further, when the input from the controller 3 to the throttle valve opening adjustment actuator 2 becomes zero, the solenoid pulp 7 is turned off to close the valve 7af, and the pulp 7be is opened to allow the seat hole 11 of the pulp 7b to be closed by the fluid. It communicates with the downstream side 1b of the throttle valve 1 via a passage 15.

以上の構成において、絞シ弁１は、通常、コントローラ
３からの指令でコントロールされるアクチュエータ２に
よってのみ回置調整されるものあり、機関の停止に際し
、アクチュエータ２に対するコントローラ３からの入力
を零となった場合、当該アクチュエータ２はフリーの状
態となる。ま作動時にオンし、パルプ７ａを開く。した
がって、パルプ７ａのシート穴１０を介して絞り弁１の
上流側１４とアクチュエータ４のチャンバ５．６とが連
通ずるため、チャンバ５．６内の圧力は同じ圧力に保た
れ、ダイアフラム４ａは、絞シ弁１の動作にフリーの状
態で追従する。In the above configuration, the throttle valve 1 is normally adjusted in rotation only by the actuator 2, which is controlled by commands from the controller 3, and when the engine is stopped, the input from the controller 3 to the actuator 2 is set to zero. When this occurs, the actuator 2 becomes free. When activated, it turns on and opens the pulp 7a. Therefore, since the upstream side 14 of the throttle valve 1 and the chamber 5.6 of the actuator 4 communicate through the seat hole 10 of the pulp 7a, the pressure in the chamber 5.6 is kept at the same pressure, and the diaphragm 4a The operation of the throttle valve 1 is followed in a free state.

絞υ弁開度調整用アクチュエータ２にコントローラ３か
ら入力がない場合には、ソレノイドパルプ７もオフし、
パルプ７ａを閉じてパルプ７ｂを開き、パルプ７ｂのシ
ート穴１１を、流体通路１５を介して絞シ弁１の下流側
１６に連通ずる。When there is no input from the controller 3 to the throttle υ valve opening adjustment actuator 2, the solenoid pulp 7 is also turned off,
The pulp 7a is closed and the pulp 7b is opened, and the seat hole 11 of the pulp 7b is communicated with the downstream side 16 of the throttle valve 1 via the fluid passage 15.

したがって、絞シ弁閉鎖専用アクチュエ〜り４のチャン
バ６内は、流体通路９および１５を介して絞９弁ｌのＦ
流側１６と同じ圧力となシ、他方チャンバ５内の圧力は
、絞シ弁１の上流側１４と同じ圧力を保っておシ、ダイ
アフラム４ａは、絞シ弁１の上流側圧力と下流側圧力と
の差によってチャンバ６側に引かれ、絞シ弁１を閉じる
ものであって、このとき絞り弁開度調整用アクチュエー
タ２はフリーの状態にあるため、絞シ弁１の閉動作に追
従する。Therefore, the inside of the chamber 6 of the actuator 4 dedicated to closing the throttle valve 1 passes through the fluid passages 9 and 15 to the F of the throttle valve 1.
The pressure in the chamber 5 is maintained at the same pressure as the upstream side 14 of the throttle valve 1, and the diaphragm 4a maintains the same pressure as the upstream side 16 of the throttle valve 1. It is pulled toward the chamber 6 side by the difference in pressure and closes the throttle valve 1. At this time, the throttle valve opening adjustment actuator 2 is in a free state, so it follows the closing operation of the throttle valve 1. do.

また、通常運転時、絞り弁１を閉じ側に動作させるにあ
たシ、絞シ弁開度調整用アクチュエータ２のみで絞ｐ弁
１を動作させることができない場什ハ、コントローラ３
からの指令によってソレノイドパルプ７をオフし、パル
プ７ａを閉じてパルプ７ｂを開くことによシ、絞シ弁１
の上流側圧力と下流側圧力との差によってダイアフラム
４ａｆチヤンバ６側に引き、絞り弁１の閉じ動作をアシ
ストすることもできる。In addition, during normal operation, when the throttle valve 1 cannot be operated to the closing side by the throttle valve opening adjustment actuator 2 alone, the controller 3
By turning off the solenoid pulp 7, closing the pulp 7a and opening the pulp 7b, the throttle valve 1
The diaphragm 4af can be pulled toward the chamber 6 side by the difference between the upstream pressure and the downstream pressure, thereby assisting the closing operation of the throttle valve 1.

〔発明の効果〕〔Effect of the invention〕

本発明は以上のごときであシ、本発明は、内燃機関の絞
シ弁開閉制御装置において、絞シ弁開度調整用のアクチ
ュエータとは別異に、絞シ弁の開度調整動作にフリーの
状態で追従する絞り弁閉鎖専用のアクチュエータを付設
したことにょシ、上記絞９弁開度調整用のアクチュエー
タを小型化しても、絞シ弁の戻シネ足をきたすことのな
い、実用に供して好適なこの種制御装置を得ることがで
きる。The present invention is as described above, and the present invention provides a throttle valve opening/closing control device for an internal combustion engine. By attaching an actuator dedicated to closing the throttle valve to follow the condition of , even if the actuator for adjusting the opening of the nine throttle valves is miniaturized, the throttle valve will not return to its original position, making it suitable for practical use. A suitable control device of this type can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明に係る絞シ弁開閉制御卸装置の一実施例
を示す系統説明図、第２図は本発明装置の他の実施例を
示す系統説明図である。 ｌ・・・絞シ弁、２・・・絞シ弁開度調整用アクチュエ
ータ、３・・・コントローラ、４・・・絞シ弁閉鎖専用
アクチュエータ、４ａ・・・ダイアフラム、５および６
・・・チャンバ、７・・・ソレノイドパルプ、７ａおよ
び７ｂ・・・パルプ、７Ｃおよび７ｄ・・・パルプボッ
クス、８および９・・・流体通路、１０および１１・・
・シート穴、１２および１３・・・流体通路、１４・・
・絞り弁上流側、１５・・・流体通路、１６・・・絞り
弁ド？ＩＣ側。FIG. 1 is a system diagram showing one embodiment of the throttle valve opening/closing control device according to the present invention, and FIG. 2 is a system diagram showing another embodiment of the device of the present invention. l... Throttle valve, 2... Actuator for adjusting the opening of the throttle valve, 3... Controller, 4... Actuator dedicated to closing the throttle valve, 4a... Diaphragm, 5 and 6
...Chamber, 7...Solenoid pulp, 7a and 7b...Pulp, 7C and 7d...Pulp box, 8 and 9...Fluid passage, 10 and 11...
・Seat holes, 12 and 13...Fluid passage, 14...
- Throttle valve upstream side, 15... Fluid passage, 16... Throttle valve closed? IC side.

Claims (1)

【特許請求の範囲】[Claims] １、絞シ弁と、当該絞シ弁の開度を調整するアクチュエ
ータとを備えてなる絞シ弁開閉制御装置において、上記
絞り弁開度調整用アクチュエータとは別異に、絞り弁の
開度調整動作にフリーの状態で追従する絞シ弁閉鎖専用
アクチュエータを付設してなることを特徴とする絞り弁
開閉制御装置。1. In a throttle valve opening/closing control device comprising a throttle valve and an actuator that adjusts the opening of the throttle valve, the throttle valve opening/closing control device is different from the actuator for adjusting the throttle valve opening. A throttle valve opening/closing control device characterized by being equipped with an actuator dedicated to closing the throttle valve that freely follows adjustment operations.
JP20465483A 1983-11-02 1983-11-02 Throttle valve open/close controller Pending JPS6098133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20465483A JPS6098133A (en) 1983-11-02 1983-11-02 Throttle valve open/close controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20465483A JPS6098133A (en) 1983-11-02 1983-11-02 Throttle valve open/close controller

Publications (1)

Publication Number Publication Date
JPS6098133A true JPS6098133A (en) 1985-06-01

Family

ID=16494071

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20465483A Pending JPS6098133A (en) 1983-11-02 1983-11-02 Throttle valve open/close controller

Country Status (1)

Country Link
JP (1) JPS6098133A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660518A (en) * 1985-01-25 1987-04-28 Hitachi, Ltd. Idling return device for internal combustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660518A (en) * 1985-01-25 1987-04-28 Hitachi, Ltd. Idling return device for internal combustion engines

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