JPS62155324U - - Google Patents
Info
- Publication number
- JPS62155324U JPS62155324U JP4299486U JP4299486U JPS62155324U JP S62155324 U JPS62155324 U JP S62155324U JP 4299486 U JP4299486 U JP 4299486U JP 4299486 U JP4299486 U JP 4299486U JP S62155324 U JPS62155324 U JP S62155324U
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- knocking sensor
- phase difference
- high frequency
- frequency signal
- 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
Links
- 238000001514 detection method Methods 0.000 claims 2
- 238000004092 self-diagnosis Methods 0.000 claims 2
- 238000002485 combustion reaction Methods 0.000 claims 1
- 230000006866 deterioration Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
従来例の回路図を示す。
１１……ノツキングセンサ、１３……ハーネス
、１４……コントロールユニツト、１６……マイ
クロコンピユータ、１７……ベクトルインピーダ
ンスメータ、１８……電流値判定回路、１９……
位相差判定回路、Ｆ……クロツク信号。
FIG. 1 shows a circuit diagram of an embodiment of the present invention, and FIG. 2 shows a circuit diagram of a conventional example. 11...Knocking sensor, 13...Harness, 14...Control unit, 16...Microcomputer, 17...Vector impedance meter, 18...Current value judgment circuit, 19...
Phase difference judgment circuit, F...clock signal.
Claims (1)
れたハウジング内に、振動を検出するための圧電
素子を備えたノツキングセンサの自己診断装置に
おいて、前記圧電素子に供給する高周波信号を発
生する手段と、該発生手段からの高周波信号によ
つて前記圧電素子に流れる電流値及び電流と電圧
の位相差を検出する検出手段と、該検出手段の検
出した電流値と位相差に基づいてノツキングセン
サの劣化状況を判定する判定手段とを設けて構成
したことを特徹とするノツキングセンサの自己診
断装置。 A knocking sensor self-diagnosis device comprising a piezoelectric element for detecting vibration in a housing formed to be attached to a main body of an internal combustion engine, comprising: means for generating a high frequency signal to be supplied to the piezoelectric element; a detection means for detecting the current value flowing through the piezoelectric element and the phase difference between the current and the voltage according to the high frequency signal from the generation means; and deterioration of the knocking sensor based on the current value and phase difference detected by the detection means. A self-diagnosis device for a knocking sensor is characterized in that it is constructed by providing a judgment means for judging the situation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4299486U JPS62155324U (en) | 1986-03-26 | 1986-03-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4299486U JPS62155324U (en) | 1986-03-26 | 1986-03-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62155324U true JPS62155324U (en) | 1987-10-02 |
Family
ID=30859436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4299486U Pending JPS62155324U (en) | 1986-03-26 | 1986-03-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62155324U (en) |
-
1986
- 1986-03-26 JP JP4299486U patent/JPS62155324U/ja active Pending
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