JPH03128868U - - Google Patents
Info
- Publication number
- JPH03128868U JPH03128868U JP3666090U JP3666090U JPH03128868U JP H03128868 U JPH03128868 U JP H03128868U JP 3666090 U JP3666090 U JP 3666090U JP 3666090 U JP3666090 U JP 3666090U JP H03128868 U JPH03128868 U JP H03128868U
- Authority
- JP
- Japan
- Prior art keywords
- solenoid
- signal
- switch means
- port
- input section
- 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
Links
- 238000001514 detection method Methods 0.000 claims 2
- 238000003745 diagnosis Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Protection Of Static Devices (AREA)
Description
第１図は本考案の構成を示す機能ブロツク図、
第２図は第１の考案による実施例を示す回路図、
第３図は第２図の信号波形図、第４図は第２の考
案による実施例を示す回路図、第５図は第４図の
信号波形図、第６図は従来のソレノイド診断装置
を示す回路図である。
１…ソレノイド、２…マイクロコンピユータ、
４…入出力回路、５…バツフア、Ｔｒ１，Ｔｒ４
…トランジスタ。
Figure 1 is a functional block diagram showing the configuration of the present invention.
FIG. 2 is a circuit diagram showing an embodiment according to the first invention;
Fig. 3 is a signal waveform diagram of Fig. 2, Fig. 4 is a circuit diagram showing an embodiment according to the second invention, Fig. 5 is a signal waveform diagram of Fig. 4, and Fig. 6 is a diagram of the conventional solenoid diagnostic device. FIG. 1...Solenoid, 2...Microcomputer,
4...Input/output circuit, 5...Buffer, Tr 1 , Tr 4
...transistor.
Claims (1)
ピユータからソレノイド駆動信号を出力して前記
スイツチ手段をオンさせてソレノイドに通電し、
ソレノイド駆動信号の停止によりオフさせた時に
発生するソレノイドの逆起電力の電圧をマイクロ
コンピユータで検出することにより、ソレノイド
の断線を診断するソレノイド断線診断装置におい
て、 前記スイツチ手段の信号入力部にソレノイド駆
動信号を出力すると共に、前記スイツ手段のオフ
した時の前記信号入力部の電圧を入力する入出力
可能なポートと、 前記ソレノイド駆動信号を出力する直前に前記
ポートを出力モードに切り換え、前記ソレノイド
駆動信号の出力が停止した後、所定時間内に前記
ポートを入力モードに切り換えるポートモード切
り換え手段と、 前記ポートの入力モード時に前記ポートの入力
電圧を入力してソレノイドの断線の判定を行う判
定手段と、を前記マイクロコンピユータに備え、 前記スイツチ手段がオフした時、前記スイツチ
手段の信号入力部にソレノイドの逆起電力の電圧
を入力する入力手段を備えたことを特徴とするソ
レノイド断線診断装置。 (2) スイツチ手段の信号入力部にマイクロコン
ピユータからソレノイド駆動信号を出力して前記
スイツチ手段をオンさせてソレノイドに通電し、
ソレノイド駆動信号の停止によりオフさせた時に
発生するソレノイドの逆起電力の電圧をマイクロ
コンピユータで検出することにより、ソレノイド
の断線を診断するソレノイド断線診断装置におい
て、 前記スイツチ手段の信号入力部にソレノイド駆
動信号を出力すると共に、前記スイツチ手段のオ
フした時の前記信号入力部の電圧を入力する入出
力可能なポートと、 該ポートに接続し、オン動作の時に当該ポート
を介して前記スイツチ手段の信号入力部にソレノ
イド駆動信号を出力し、オフ動作の時には前記ポ
ートから見て高抵抗である信号出力手段と、 前記信号出力手段をオン・オフ駆動制御する制
御手段と、 前記ポートに接続し、当該ポートを介して前記
スイツチ手段の信号入力部の電圧を検出する検出
手段と、 前記スイツチ手段がオフした時の前記検出手段
の出力に基づいてソレノイドの断線の判定を行う
判定手段と、を前記マイクロコンピユータに備え
、 前記スイツチ手段がオフした時、前記スイツチ
手段の信号入力部にソレノイドの逆起電力の電圧
を入力する入力手段を備えたことを特徴とする請
求項１記載のソレノイド断線診断装置。[Claims for Utility Model Registration] (1) A solenoid drive signal is output from a microcomputer to a signal input section of the switch means to turn on the switch means and energize the solenoid;
In a solenoid disconnection diagnosis device for diagnosing disconnection of a solenoid by detecting with a microcomputer the voltage of the back electromotive force of the solenoid generated when the solenoid is turned off by stopping the solenoid drive signal, the solenoid drive signal is connected to the signal input section of the switching means. an input/output port that outputs a signal and inputs the voltage of the signal input section when the switch means is turned off; and immediately before outputting the solenoid drive signal, the port is switched to an output mode to drive the solenoid. Port mode switching means for switching the port to an input mode within a predetermined time after the output of a signal has stopped; and determining means for inputting the input voltage of the port when the port is in the input mode to determine whether the solenoid is disconnected. A solenoid disconnection diagnosing device, characterized in that the microcomputer is equipped with: input means for inputting the voltage of the back electromotive force of the solenoid to a signal input section of the switch means when the switch means is turned off. (2) outputting a solenoid drive signal from the microcomputer to the signal input section of the switch means to turn on the switch means and energize the solenoid;
In a solenoid disconnection diagnosis device for diagnosing disconnection of a solenoid by detecting with a microcomputer the voltage of the back electromotive force of the solenoid generated when the solenoid is turned off by stopping the solenoid drive signal, the solenoid drive signal is connected to the signal input section of the switching means. an input/output port that outputs a signal and inputs the voltage of the signal input section when the switch means is turned off; a signal output means that outputs a solenoid drive signal to the input section and has a high resistance when viewed from the port when in off operation; a control means that controls on/off drive of the signal output means; A detection means for detecting a voltage at a signal input section of the switch means through a port, and a determination means for determining whether the solenoid is disconnected based on the output of the detection means when the switch means is turned off. 2. The solenoid disconnection diagnostic device according to claim 1, further comprising input means for inputting the voltage of the back electromotive force of the solenoid to a signal input section of the switch means when the switch means is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3666090U JPH0645273Y2 (en) | 1990-04-06 | 1990-04-06 | Solenoid disconnection diagnostic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3666090U JPH0645273Y2 (en) | 1990-04-06 | 1990-04-06 | Solenoid disconnection diagnostic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03128868U true JPH03128868U (en) | 1991-12-25 |
| JPH0645273Y2 JPH0645273Y2 (en) | 1994-11-16 |
Family
ID=31543084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3666090U Expired - Lifetime JPH0645273Y2 (en) | 1990-04-06 | 1990-04-06 | Solenoid disconnection diagnostic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0645273Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4736569B2 (en) * | 2005-07-01 | 2011-07-27 | 株式会社デンソー | Inductive load abnormality detection device |
| JP2016143799A (en) * | 2015-02-03 | 2016-08-08 | 株式会社デンソー | Abnormality detection circuit |
-
1990
- 1990-04-06 JP JP3666090U patent/JPH0645273Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4736569B2 (en) * | 2005-07-01 | 2011-07-27 | 株式会社デンソー | Inductive load abnormality detection device |
| JP2016143799A (en) * | 2015-02-03 | 2016-08-08 | 株式会社デンソー | Abnormality detection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0645273Y2 (en) | 1994-11-16 |
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