JPH0313417B2 - - Google Patents
Info
- Publication number
- JPH0313417B2 JPH0313417B2 JP57097380A JP9738082A JPH0313417B2 JP H0313417 B2 JPH0313417 B2 JP H0313417B2 JP 57097380 A JP57097380 A JP 57097380A JP 9738082 A JP9738082 A JP 9738082A JP H0313417 B2 JPH0313417 B2 JP H0313417B2
- Authority
- JP
- Japan
- Prior art keywords
- injectors
- fuel injection
- disconnection
- injector
- fuel supply
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 claims description 32
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 12
- 230000005856 abnormality Effects 0.000 description 14
- 230000002159 abnormal effect Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
【発明の詳細な説明】
本発明は複数個のインジエクタにより燃料を供
給する電子式燃料噴射装置に関するもので、特に
インジエクタの異常時に燃料噴射時間を変えるこ
とにより車輌を走行可能とするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic fuel injection device that supplies fuel using a plurality of injectors, and in particular, enables a vehicle to run by changing the fuel injection time when an injector is abnormal.
従来の、例えばインジエクタを２個有する特開
昭54−114642号公報に示される如きシングル・ポ
イント燃料噴射システム（Single Point Fuel
Injection SPFI）では、一方のインジエクタの駆
動回路又はワイヤーハーネスが断線した時に、燃
料供給量が半分となり、その結果車輌が走行不能
となる欠点があつた。 A conventional single point fuel injection system (Single Point Fuel
Injection SPFI) had the disadvantage that if the drive circuit or wire harness of one injector was disconnected, the amount of fuel supplied would be halved, resulting in the vehicle being unable to run.
本発明は上記の欠点を解消するものである。 The present invention overcomes the above-mentioned drawbacks.
本発明の目的は燃料供給系の異常状態を断線状
態と特定することにより、燃料供給量を正常に維
持し、車輌の正常な走行を可能とする点にある。 An object of the present invention is to maintain a normal fuel supply amount by identifying an abnormal state in a fuel supply system as a disconnection state, thereby enabling the vehicle to run normally.
この目的を達成するために本発明は燃料供給系
の断線を検出する断線検出手段と、断線検出手段
により断線が検出された時、複数の燃料供給系の
各駆動回路に対し、複数個全てのインジエクタの
燃料噴射時間をそれぞれ同じ量丈変更する信号を
供給する噴射時間変更手段とを備える。 In order to achieve this object, the present invention includes a disconnection detection means for detecting a disconnection in a fuel supply system, and when a disconnection is detected by the disconnection detection means, a disconnection detection means for detecting a disconnection in a fuel supply system. and injection time changing means for supplying signals for changing the fuel injection times of the injectors by the same amount.
以下本発明により電子式燃料噴射装置を実施例
に従つて詳細に説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS An electronic fuel injection device according to the present invention will be described in detail below according to embodiments.
第１図は本発明による電子式燃料噴射装置の一
実施例の構成図を示す。第１図に於いて、１はセ
ントラル・プロセツサ・ユニツト（Central
Processor Unit、以下CPUと略す）でエンジン
の運転状態に応じてインジエクタ駆動信号を出力
する。２，３はそれぞれインジエクタ駆動回路
で、CPU１からの信号８，９に基きスロツトル
弁６の上流に設けられたインジエクタ５及び５′
を駆動する。４はインジエクタ駆動回路系異常検
出器で、インジエクタ駆動回路２及び３への入力
信号８，９と、駆動回路後の電流検出回路１０，
１１からの信号１４，１５を比較し、インジエク
タ駆動回路２，３の異常及びインジエクタ５，
５′とインジエクタ駆動回路２，３間の配線の断
線及びインジエクタ５，５′内のコイル５ａ，
５′ａの断線を検出し、異常ならば異常信号１６
をCPU１へ出力する。エンジン７の回転速度
（Ｎ）を回転検出センサ１２により検出したCPU
１へ出力する。同様に、エンジン７の吸気管圧力
（Pm）の圧力センサ１３により検出しCPU１へ
出力する。 FIG. 1 shows a configuration diagram of an embodiment of an electronic fuel injection device according to the present invention. In Figure 1, 1 is the central processor unit.
The Processor Unit (hereinafter abbreviated as CPU) outputs an injector drive signal according to the engine operating status. 2 and 3 are injector drive circuits, respectively, which drive injectors 5 and 5' provided upstream of the throttle valve 6 based on signals 8 and 9 from the CPU 1.
to drive. 4 is an injector drive circuit abnormality detector, which detects input signals 8 and 9 to the injector drive circuits 2 and 3, and a current detection circuit 10 after the drive circuit;
The signals 14 and 15 from the injector drive circuits 2 and 3 are compared, and the signals 14 and 15 from the injector drive circuits 2 and 3 are compared, and the injectors 5 and 11 are abnormal.
5' and the injector drive circuits 2 and 3, and the coils 5a and 5a in the injectors 5 and 5'.
5'a is detected, and if it is abnormal, an abnormality signal 16 is sent.
Output to CPU1. The CPU detects the rotation speed (N) of the engine 7 by the rotation detection sensor 12
Output to 1. Similarly, the pressure sensor 13 detects the intake pipe pressure (Pm) of the engine 7 and outputs it to the CPU 1.
第２図は第１図に示される電子式燃料噴射装置
に用いられるインジエクタ駆動回路系異常検出器
４の動作を説明するための動作波形図を示す。第
１図に於いてCPU出力信号８と検出電流信号１
４、又はCPU出力信号９と検出電流信号１５を
それぞれ比較し、異なつていれば異常信号１６を
CPU１へ出力する。 FIG. 2 shows an operational waveform diagram for explaining the operation of the injector drive circuit abnormality detector 4 used in the electronic fuel injection system shown in FIG. In Figure 1, CPU output signal 8 and detection current signal 1
4, or compare the CPU output signal 9 and the detected current signal 15, and if they are different, send the abnormal signal 16.
Output to CPU1.
第３図は第１図に示される電子式燃料噴射装置
の動作過程を示すフローチヤートである。 FIG. 3 is a flowchart showing the operation process of the electronic fuel injection system shown in FIG.
第３図に於いて燃料噴射量演算ルーチン１００
が起動されるとまずステツプ101で回転検出セン
サ１２よりエンジン回転速度（Ｎ）、又圧力セン
サ１３より吸気管圧力（Pm）を取り込む。次に
ステツプ102へ進みエンジン回転速度（Ｎ）、及び
吸気管圧力（Pm）によりあらかじめ定められた
基本噴射パルス巾Tpを算出し、ステツプ103へ進
む。ステツプ103では、前記異常検出器４からの
信号が異常を示しているかどうかを判別し、異常
ならばステツプ104へ進も基本噴射パルス巾に２
倍の値を入れ、次のステツプ105へ進む。ステツ
プ103で正常と判別した場合には、ステツプ105へ
進み、基本噴射パルス巾にその時の運転状態に対
応する補正比(K)を乗じ、電圧に対する補正項
（τv）を加え、噴射パルス巾（τ）を算出する。
次にステツプ106で噴射パルス巾（τ）に相当す
る信号をインジエクタ駆動回路２及び３へ出力
し、ステツプ107へ進み噴射量演算ルーチンを終
了する。この実施例では異常検出器４から異常信
号１６が出力されている時に正常側と異常側両方
のインジエクタ駆動回路２及び３が２倍のパルス
巾で駆動されることになるが、異常側のインジエ
クタは作動しないので、結局は正常側のインジエ
クタのみが２倍の量の燃料を噴射して両方のイン
ジエクタが正常の場合と同じ燃料供給量となる。 In FIG. 3, fuel injection amount calculation routine 100
When the engine is started, first, in step 101, the engine rotation speed (N) is taken in from the rotation detection sensor 12, and the intake pipe pressure (Pm) is taken in from the pressure sensor 13. Next, the process proceeds to step 102, where a basic injection pulse width Tp predetermined based on the engine speed (N) and intake pipe pressure (Pm) is calculated, and the process proceeds to step 103. In step 103, it is determined whether the signal from the abnormality detector 4 indicates an abnormality, and if abnormal, the process proceeds to step 104.
Enter the double value and proceed to the next step 105. If it is determined to be normal in step 103, the process proceeds to step 105, where the basic injection pulse width is multiplied by the correction ratio (K) corresponding to the operating state at that time, a correction term for voltage (τv) is added, and the injection pulse width ( τ) is calculated.
Next, in step 106, a signal corresponding to the injection pulse width (τ) is output to the injector drive circuits 2 and 3, and the process proceeds to step 107, ending the injection amount calculation routine. In this embodiment, when the abnormality signal 16 is output from the abnormality detector 4, the injector drive circuits 2 and 3 on both the normal side and the abnormal side are driven with twice the pulse width, but the injector drive circuits on the abnormal side does not operate, so only the injector on the normal side injects twice the amount of fuel, resulting in the same fuel supply amount as when both injectors are normal.
本実施例によれば、第３図に示される異常検出
器４の制御を実行することにより、インジエクタ
の駆動系回路の一系統に異常が生じた場合にも、
高負荷の運転を除く、一般の走行は可能となり、
修理工場への移動が容易となるという優れた効果
が得られる。前記実施例においては、２本のイン
ジエクタ５，５′を持つ電子式燃料噴射装置につ
いて述べたが、インジエクタの本数ｎは３本以上
の何本であつても異常時に補正係数をｎ／（ｎ−
ｍ）とすることにより同等の効果が得られること
は明らかである。但し、ｍは異常インジエクタの
本数とする。 According to this embodiment, by executing the control of the abnormality detector 4 shown in FIG. 3, even when an abnormality occurs in one system of the drive system circuit of the injector,
General driving is possible, except for high-load driving.
An excellent effect can be obtained in that transportation to a repair shop is facilitated. In the above embodiment, an electronic fuel injection device having two injectors 5 and 5' was described, but no matter how many injectors n is 3 or more, the correction coefficient is set to n/(n −
It is clear that equivalent effects can be obtained by using m). However, m is the number of abnormal injectors.
以上述べたように、本発明によれば、複数本の
インジエクタの内のいくつかに異常が生じたとし
ても、その異常が異常検出手段によつて検出され
ることで、噴射時間変更手段にてその異常に対応
してインジエクタの噴射時間が変更されるので、
エンジンに対する燃料供給量を適正な状態から大
きくずれるということが抑制でき、従つて車輌の
走行不能を防止できるという優れた効果がある。 As described above, according to the present invention, even if an abnormality occurs in some of the plurality of injectors, the abnormality is detected by the abnormality detection means, and the injection time changing means The injection time of the injector will be changed in response to the abnormality, so
This has an excellent effect in that it is possible to prevent the amount of fuel supplied to the engine from deviating significantly from the appropriate state, and therefore it is possible to prevent the vehicle from being unable to run.
更に本発明によれば、燃料供給系の異常状態を
断線状態と特定しており、異常状態時に異常であ
ると検出したインジエクタへ信号を送つても、も
ともと噴射不能であるため、正常インジエクタと
異常インジエクタとにそれぞれ供給する信号を特
に区別する必要がなく、その結果構成が簡単にな
るという効果がある。 Furthermore, according to the present invention, an abnormal state in the fuel supply system is identified as a disconnection state, and even if a signal is sent to the injector detected as abnormal during the abnormal state, since it is originally unable to inject, it can be distinguished from the normal injector and the abnormal injector. There is no need to distinguish between the signals supplied to the injectors and the injectors, and as a result, the configuration is simplified.
第１図は本発明による電子式燃料噴射装置の一
実施例の構成図、第２図は第１図に示される装置
の動作波形図、第３図は第１図に示される装置の
動作過程を示すフローチヤートである。
１……CPU、２，３……インジエクタ駆動回
路、４……異常検出器、５，５′……インジエク
タ、６……スロツトル弁、７……エンジン、１
０，１１……電流検出回路、１２……回転検出セ
ンサ、１３……圧力センサ。
FIG. 1 is a configuration diagram of an embodiment of an electronic fuel injection device according to the present invention, FIG. 2 is an operating waveform diagram of the device shown in FIG. 1, and FIG. 3 is an operating process of the device shown in FIG. 1. This is a flowchart showing the following. 1... CPU, 2, 3... Injector drive circuit, 4... Abnormality detector, 5, 5'... Injector, 6... Throttle valve, 7... Engine, 1
0, 11... Current detection circuit, 12... Rotation detection sensor, 13... Pressure sensor.
Claims (1)
それぞれ接続された駆動回路から成る複数の燃料
供給系を有する電子式燃料噴射装置に於いて、 該燃料供給系の断線を検出する断線検出手段
と、 該断線検出手段により断線が検出された時、前
記複数の燃料供給系の各駆動回路に対し、前記複
数個全てのインジエクタの燃料噴射時間をそれぞ
れ同じ量丈変更する信号を供給する噴射時間変更
手段とを有する事を特徴とする電子式燃料噴射装
置。 ２ 前記複数個のインジエクタがスロツトル弁の
上記に設けられていることを特徴とする特許請求
の範囲第１項記載の電子式燃料噴射装置。 ３ 前記インジエクタの数ｎ個の内断線燃料供給
系の数をｍ個とした場合、前記噴射時間変更手段
は前記複数個全てのインジエクタの有効燃料噴射
時間をｎ／ｎ−ｍ倍とすることを特徴とする特許
請求の範囲第１項記載の電子式燃料噴射装置。[Scope of Claims] 1. Disconnection detection for detecting disconnection in the fuel supply system in an electronic fuel injection device having a plurality of fuel supply systems each including a plurality of injectors and drive circuits connected to the injectors, respectively. means, when a disconnection is detected by the disconnection detection means, an injection unit that supplies a signal to each drive circuit of the plurality of fuel supply systems to change the fuel injection time of each of the plurality of injectors by the same amount. An electronic fuel injection device characterized by having a time change means. 2. The electronic fuel injection device according to claim 1, wherein the plurality of injectors are provided above a throttle valve. 3 When the number of injectors is n and the number of internally disconnected fuel supply systems is m, the injection time changing means increases the effective fuel injection time of all the plurality of injectors by n/n-m times. An electronic fuel injection device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9738082A JPS58214634A (en) | 1982-06-07 | 1982-06-07 | Electronically controlled fuel injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9738082A JPS58214634A (en) | 1982-06-07 | 1982-06-07 | Electronically controlled fuel injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58214634A JPS58214634A (en) | 1983-12-13 |
| JPH0313417B2 true JPH0313417B2 (en) | 1991-02-22 |
Family
ID=14190899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9738082A Granted JPS58214634A (en) | 1982-06-07 | 1982-06-07 | Electronically controlled fuel injection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58214634A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5776778B2 (en) * | 2011-09-02 | 2015-09-09 | トヨタ自動車株式会社 | Fuel supply device for internal combustion engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173536A (en) * | 1981-04-16 | 1982-10-25 | Nissan Motor Co Ltd | Fuel feed controller of internal combustion engine |
-
1982
- 1982-06-07 JP JP9738082A patent/JPS58214634A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173536A (en) * | 1981-04-16 | 1982-10-25 | Nissan Motor Co Ltd | Fuel feed controller of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58214634A (en) | 1983-12-13 |
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