JPH0281947A - Fuel pump control method - Google Patents

Fuel pump control method

Info

Publication number
JPH0281947A
JPH0281947A JP23289488A JP23289488A JPH0281947A JP H0281947 A JPH0281947 A JP H0281947A JP 23289488 A JP23289488 A JP 23289488A JP 23289488 A JP23289488 A JP 23289488A JP H0281947 A JPH0281947 A JP H0281947A
Authority
JP
Japan
Prior art keywords
fuel pump
fuel
supply line
pump
electronic control
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.)
Granted
Application number
JP23289488A
Other languages
Japanese (ja)
Other versions
JPH0520589B2 (en
Inventor
Atsushi Sasaki
淳 佐々木
Shogo Nishimura
西村 昭吾
Eiji Mishima
三嶋 英二
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.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu Motor 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 Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Priority to JP23289488A priority Critical patent/JPH0281947A/en
Publication of JPH0281947A publication Critical patent/JPH0281947A/en
Publication of JPH0520589B2 publication Critical patent/JPH0520589B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

PURPOSE:To eliminate unnecessary consumption of power by providing an electronic control unit in a fuel pump performing air bleed action only when an input terminal, for a signal to perform the air bleed action, is short-circuited further with an ignition switch closed. CONSTITUTION:A fuel pump 1 is connected to a battery 5 through a fuel pump relay 3 and an ignition switch 4, and the relay 3 is connected to an electronic control unit 2. A signal for air bleed to be performed in a fuel supply line is input when a check circuit is closed short-circuiting a check terminal 8, and being based on the pump operational time (for instance, 8 seconds) set for the air bleed, the relay 3 is energized operating the fuel pump 1. Thus in the case of an engine such as being started in a vehicle assembly line, the fuel pump is operated for the predetermined time charging the fuel supply line with fuel and performing the air bleed action, and unnecessary supply of power for a long time to an electric load is eliminated.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、電子制御式燃料噴射装置を備えた自動車用エ
ンジン等に好適に利用可能な燃料ポンプの制御方法に関
する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of controlling a fuel pump that can be suitably used in an automobile engine equipped with an electronically controlled fuel injection device.

[従来の技術] 電子制御式燃料噴射装置を備えた自動車等のエンジンで
は、燃料供給ラインに介設した燃料ポンプの運転を電子
制御装置により制御し得るように構成しておき、エンジ
ンの点火信号等が前記電子制御装置に入力された場合、
すなわち、クランキング時およびエンジン始動後に連続
的に燃料ポンプを作動させてインジェクタに燃料を圧送
するようにしている。
[Prior Art] In an automobile engine equipped with an electronically controlled fuel injection device, the operation of a fuel pump installed in a fuel supply line is controlled by an electronic control device, and the engine ignition signal is etc. are input to the electronic control device,
That is, the fuel pump is operated continuously during cranking and after the engine is started to forcefully feed fuel to the injectors.

このような電子制御式の燃料ポンプを備えたものにあっ
ては、本発明の先行技術として、例えば特開昭57−2
03826号公報に示されるように、イグニッションス
イッチが閉じられた旨の信号が電子制御装置に入力され
た場合等に、燃料ポンプを微小な時間(例えば、約2秒
前後)作動させて、インジェクタから噴射する燃料を燃
料供給開始前に予め所定圧まで上昇させるようにしてい
る例もある。
In the case of a device equipped with such an electronically controlled fuel pump, as a prior art of the present invention, for example, Japanese Patent Application Laid-Open No. 57-2
As shown in Publication No. 03826, when a signal to the effect that the ignition switch is closed is input to the electronic control unit, the fuel pump is operated for a short period of time (for example, about 2 seconds) and the injector is In some cases, the pressure of the injected fuel is raised to a predetermined pressure before the fuel supply starts.

[発明が解決しようとする課題] ところが、従来のものには燃料供給ラインの空気抜きを
行うためのポンプ作動時間は格別に設定されていない。
[Problems to be Solved by the Invention] However, in conventional pumps, the pump operating time for venting air from the fuel supply line is not specifically set.

そのため、車両の組付はラインの最終工程でエンジンを
始動する場合や燃料パイプ、燃料タンク等の交換・点検
後は、比較的長い時間燃料ポンプを作動させて燃料供給
ラインの空気抜きを行うようにしているのが実状である
。しかして、このような手法によれば、スタータ等を連
続的に駆動させることになるとともに、イグナイタ等か
ら前記電子制御装置に点火信号等を長時間入力させるこ
とが必要となるため、作業の繁雑化を招く上に、スター
タやイグナイタ等の電気負荷へも多量の電力が消費され
ることになる。
Therefore, when assembling a vehicle, when starting the engine in the final process of the line, or after replacing or inspecting the fuel pipe, fuel tank, etc., it is recommended to operate the fuel pump for a relatively long time to bleed air from the fuel supply line. The reality is that However, according to such a method, it is necessary to continuously drive the starter etc., and it is also necessary to input the ignition signal etc. from the igniter etc. to the electronic control device for a long time, making the work complicated. In addition to this, a large amount of power is consumed by electric loads such as starters and igniters.

また、単にイグニッンヨンスイッチを閉じただけの条件
で燃料ポンプを長時間運転させるように設定すれば、イ
グニッションスイッチを閉じる都度に燃料ポンプが長時
間運転されることになり、安全上の面などからも好まし
くない。
Additionally, if the fuel pump is set to run for a long time when the ignition switch is simply closed, the fuel pump will run for a long time each time the ignition switch is closed, which poses a safety issue. It is also not desirable.

本発明は、このような不具合を解消することを目的とし
ている。
The present invention aims to eliminate such problems.

[課題を解決するための手段] かかる目的を達成するための本発明は、燃料供給ライン
に介設した燃料ポンプを電子制御装置により制御するよ
うに構成した燃料ポンプの制御方法であって、前記燃料
供給ラインの空気抜きを行うべき旨の信号を前記電子制
御装置に人力するチェック端子を短絡し、かつイグニッ
ションスイッチが閉じられた場合に限り、前記燃料ポン
プを前記燃料供給ラインの空気抜き用に設定したポンプ
作動時間に基づいて作動させるようにしたことを特徴と
する。
[Means for Solving the Problems] To achieve the above object, the present invention is a fuel pump control method configured to control a fuel pump interposed in a fuel supply line by an electronic control device, which comprises: The fuel pump is set to bleed air from the fuel supply line only when a check terminal that manually sends a signal to the electronic control device to bleed air from the fuel supply line and an ignition switch is closed. It is characterized in that the pump is operated based on the pump operating time.

[作用] このような構成からなる燃料ポンプの制御方法によれば
、チェック端子を短絡し、かつイグニッションスイッチ
を閉じると、予め設定したポンプ作動時間に基づいて燃
料ポンプが作動する。このため、車両組立ラインの最終
工程でエンジンを始動させる場合や燃料供給ラインの部
品交換・点検等の後には、スタータやイグナイタ等によ
って多量の電力が消費されることがなく、燃料ポンプに
よって自動的に燃料供給ラインに燃料が充填されるとと
もに、燃料供給ラインの空気抜きが行われることになる
。そして、次回からはイグニッションスイッチが閉じら
れる毎に、燃料ポンプの一般的な制御が行われることに
なる。
[Operation] According to the fuel pump control method having such a configuration, when the check terminal is short-circuited and the ignition switch is closed, the fuel pump is operated based on a preset pump operation time. Therefore, when starting the engine in the final process of a vehicle assembly line or after replacing or inspecting parts of the fuel supply line, large amounts of electricity are not consumed by starters, igniters, etc., and the fuel pump automatically starts the engine. At the same time, the fuel supply line is filled with fuel and air is vented from the fuel supply line. From next time onwards, general control of the fuel pump will be performed every time the ignition switch is closed.

[実施例] 以下、本発明の一実施例を図面を参照して説明する。[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

第1図は、自動車のエンジン(図示せず)に装着された
電子制御装置や燃料ポンプ等の接続回路を慨略的に示し
たものである。このエンジンは、吸気管等に装着したイ
ンジェクタや、燃料タンクから前記インジェクタに至る
燃料供給ライン(図示せず)に介設した燃料ポンプ1等
を共通の電子制御装置2により制御するように構成した
ものである。
FIG. 1 schematically shows a connection circuit for an electronic control unit, a fuel pump, etc. installed in an engine (not shown) of an automobile. This engine is configured so that a common electronic control device 2 controls an injector attached to an intake pipe, etc., a fuel pump 1, etc. interposed in a fuel supply line (not shown) leading from a fuel tank to the injector. It is something.

燃料ポンプ1は、燃料ポンプリレー3およびイグニッシ
ョンスイッチ4を介してバッテリ5に接続l、である。
A fuel pump 1 is connected to a battery 5 via a fuel pump relay 3 and an ignition switch 4.

そして、この燃料ポンプ1にバッテリ5の電力が入力さ
れると、連続的な運転に伴って燃料タンクから吸い上げ
た燃料を調圧弁を介して前記インジェクタに圧送するよ
うになっている。
When power from the battery 5 is input to the fuel pump 1, the fuel sucked up from the fuel tank during continuous operation is pumped to the injector via the pressure regulating valve.

前記燃料ポンプリレー3は、コイル3aに通電状態で接
点3bが閉じる常開型のもので、そのコイル3aの一方
を燃料ポンプ駆動回路6を介して前記電子制御装置2に
接続しである。
The fuel pump relay 3 is of a normally open type in which a contact 3b closes when a coil 3a is energized, and one side of the coil 3a is connected to the electronic control unit 2 via a fuel pump drive circuit 6.

電子制御装置2は、中央演算処理装置やメモリ、人出力
インターフェース等を備えたものであり、電源回路7お
よび前記イグニッションスイッチ4を介して前記バッテ
リ5に接続しであるとともに、イグナイタ(図示せず)
等と接続しである。そして、この電子制御装置2にイグ
ナイタの点火信号が人力されると、その点火信号が入力
されている間、前記燃料ポンプリレー3の接点3bを閉
じて連続的に燃料ポンプ1を作動させるようになってい
る。さらに、この電子制御装置2には、燃料供給ライン
の空気抜きを行うべき旨の信号を該電子制御装置2に入
力するためのチェック端子8を設けてあり、そのチェッ
ク端子8に開閉自在なチェック回路9を接続しである。
The electronic control unit 2 is equipped with a central processing unit, a memory, a human output interface, etc., and is connected to the battery 5 via a power supply circuit 7 and the ignition switch 4, as well as an igniter (not shown). )
It is connected with etc. When the igniter's ignition signal is manually input to the electronic control device 2, the contact 3b of the fuel pump relay 3 is closed to continuously operate the fuel pump 1 while the ignition signal is being input. It has become. Further, this electronic control device 2 is provided with a check terminal 8 for inputting a signal to the electronic control device 2 to the effect that air in the fuel supply line should be vented, and a check circuit that can be opened and closed freely is provided at the check terminal 8. 9 is connected.

そして、図面に示すように、上記チェック回路9を閉じ
てチェック端子8を短絡させ、かつ前記イグニッション
スイッチ4を閉じると、前記燃料供給ラインの空気抜き
用に設定したポンプ作動時間(例えば、約8秒)に基づ
き、前記燃料ポンプリレー3のコイル3aに通電して接
点3bを閉じ、燃料ポンプ1を連続的に作動させるよう
に設定しである。
Then, as shown in the drawing, when the check circuit 9 is closed to short-circuit the check terminal 8 and the ignition switch 4 is closed, the pump operation time (for example, about 8 seconds) set for venting the fuel supply line is activated. ), the coil 3a of the fuel pump relay 3 is energized, the contact 3b is closed, and the fuel pump 1 is set to operate continuously.

そして、このような制御を実行するために、上記電子制
御装置2には、第2図に概略的に示すようなプログラム
を内蔵しである。先ず、ステップ51ではチェック端子
8が短絡(ON)されているか否かを判別し、短絡され
ていると判断した場合にはステップ52へ進む。ステッ
プ52ではイグニッションスイッチ(IGスイッチ)4
が閉じられている(ON)か否かを判別し、閉じられて
いると判断した場合にはステップ53へ進む。ステップ
53では燃料ポンプ駆動回路6から燃料ポンプリレー3
のコイル3aに通電して接点3bを閉じ、燃料ポンプ1
を燃料供給ラインの空気抜き用に設定した時間(例えば
、約8秒)連続的に作動させる。
In order to execute such control, the electronic control device 2 has a built-in program as schematically shown in FIG. 2. First, in step 51, it is determined whether or not the check terminal 8 is short-circuited (ON). If it is determined that the check terminal 8 is short-circuited, the process proceeds to step 52. In step 52, the ignition switch (IG switch) 4
It is determined whether or not the is closed (ON), and if it is determined that it is closed, the process proceeds to step 53. In step 53, the fuel pump drive circuit 6 is connected to the fuel pump relay 3.
The coil 3a of the fuel pump 1 is energized to close the contact 3b, and the fuel pump 1
is operated continuously for a set period of time (for example, about 8 seconds) to bleed the fuel supply line.

このような構成によると、車両の組立ラインの最終工程
でエンジンを始動させる場合や燃料供給ラインの部品交
換・点検等の終了後にチェック端子8を短絡させ、イグ
ニッションスイッチ4を閉じれば、電子制御装置2等の
働きによって燃料ポンプ1が所定時間作動する。その結
果、燃料供給ラインに燃料が充填されるとともに、燃料
供給ラインの空気抜きが行われ、インジェクタに所定圧
の燃料が供給される。そして、この状態で引続いてクラ
ンキング状態に入ると、インジェクタからは所定圧の燃
料が噴射されるため、失火等が発生し難くなり、速やか
なエンジン始動が可能となる。
According to such a configuration, when starting the engine in the final process of a vehicle assembly line or after replacing or inspecting parts of the fuel supply line, if the check terminal 8 is short-circuited and the ignition switch 4 is closed, the electronic control device The fuel pump 1 operates for a predetermined period of time due to the actions of the components 2 and the like. As a result, the fuel supply line is filled with fuel, air is vented from the fuel supply line, and fuel at a predetermined pressure is supplied to the injector. When the cranking state is subsequently entered in this state, fuel at a predetermined pressure is injected from the injector, so that misfires and the like are less likely to occur, and the engine can be started quickly.

したがって、このような構成によれば、車両組立ライン
の最終工程や燃料供給ラインの部品交換・点検等の後に
燃料供給ラインの空気抜きを簡便に行うことができると
ともに、エンジン始動性を確実に高めることができる。
Therefore, with this configuration, the air in the fuel supply line can be easily vented after the final process of the vehicle assembly line or after parts replacement or inspection of the fuel supply line, and the engine startability can be reliably improved. Can be done.

また、燃料供給ラインの空気抜きを行う際に、空気抜作
業に不必要なスタータやイグナイタ等によって多量の電
力が消費されるような不具合も防止できる。
Further, when air is vented from the fuel supply line, it is possible to prevent problems such as a large amount of electric power being consumed by a starter, an igniter, etc. that are unnecessary for the air venting operation.

以上、本発明の一実施例について述べたが、本発明は上
記実施例に限定されないのは勿論である。
Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the above embodiment.

例えば、燃料供給ラインの空気抜を行うための設定時間
等は、燃料供給ラインの形態等に応じて適宜変更が可能
である。
For example, the set time for venting the fuel supply line can be changed as appropriate depending on the form of the fuel supply line.

[発明の効果] 以上のような構成からなる本発明によれば、燃料供給ラ
インの最終点検の際に、燃料供給ラインの空気抜作業に
不必要な電気負荷へ電力を消費させることなく、燃料供
給ラインの空気抜きを簡便に行うことができるとともに
、エンジンをクランキング状態から速やかに始動させる
ことができる燃料ポンプの制御方法を提供できる。
[Effects of the Invention] According to the present invention configured as described above, during the final inspection of the fuel supply line, the fuel It is possible to provide a fuel pump control method that allows air to be easily vented from a supply line and that allows an engine to be started quickly from a cranking state.

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

第1図は本発明の一実施例を示す概略的な構成図、第2
図は同実施例の制御手順を概略的に示すフローチャート
図である。 1・・・燃料ポンプ 2・・・電子制御装置 4・・・イグニッションスイッチ 8・・・チェック端子
FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention, and FIG.
The figure is a flowchart diagram schematically showing the control procedure of the same embodiment. 1...Fuel pump 2...Electronic control device 4...Ignition switch 8...Check terminal

Claims (1)

【特許請求の範囲】[Claims] 燃料供給ラインに介設した燃料ポンプを電子制御装置に
より制御するように構成した燃料ポンプの制御方法であ
って、前記燃料供給ラインの空気抜きを行うべき旨の信
号を前記電子制御装置に入力するチェック端子を短絡し
、かつイグニッションスイッチを閉じた場合に限り、前
記燃料ポンプを前記燃料供給ラインの空気抜き用に設定
したポンプ作動時間に基づいて作動させるようにしたこ
とを特徴とする燃料ポンプの制御方法。
A fuel pump control method configured to control a fuel pump interposed in a fuel supply line by an electronic control device, the check comprising inputting a signal to the electronic control device to the effect that the fuel supply line should be vented. A method for controlling a fuel pump, characterized in that the fuel pump is operated based on a pump operating time set for venting air from the fuel supply line only when terminals are short-circuited and an ignition switch is closed. .
JP23289488A 1988-09-17 1988-09-17 Fuel pump control method Granted JPH0281947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23289488A JPH0281947A (en) 1988-09-17 1988-09-17 Fuel pump control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23289488A JPH0281947A (en) 1988-09-17 1988-09-17 Fuel pump control method

Publications (2)

Publication Number Publication Date
JPH0281947A true JPH0281947A (en) 1990-03-22
JPH0520589B2 JPH0520589B2 (en) 1993-03-19

Family

ID=16946509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23289488A Granted JPH0281947A (en) 1988-09-17 1988-09-17 Fuel pump control method

Country Status (1)

Country Link
JP (1) JPH0281947A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046363A1 (en) * 2001-11-29 2003-06-05 Mikuni Corporation Method for driving fuel injection pump
WO2011007827A1 (en) * 2009-07-16 2011-01-20 ヤンマー株式会社 Method for starting dme engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3045607U (en) * 1997-07-25 1998-02-13 株式会社ヨコタ Containers and sheets for cotton tofu production

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5341630A (en) * 1976-09-27 1978-04-15 Kubota Ltd Fuel jet apparatus for diesel engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5341630A (en) * 1976-09-27 1978-04-15 Kubota Ltd Fuel jet apparatus for diesel engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046363A1 (en) * 2001-11-29 2003-06-05 Mikuni Corporation Method for driving fuel injection pump
US7100578B2 (en) 2001-11-29 2006-09-05 Mikuni Corporation Method for driving fuel injection pump
WO2011007827A1 (en) * 2009-07-16 2011-01-20 ヤンマー株式会社 Method for starting dme engine
JP2011021557A (en) * 2009-07-16 2011-02-03 Yanmar Co Ltd Starting method for dme engine
CN102472203A (en) * 2009-07-16 2012-05-23 洋马株式会社 How to start a DME engine

Also Published As

Publication number Publication date
JPH0520589B2 (en) 1993-03-19

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