JPS5663219A - Knocking detecting system - Google Patents
Knocking detecting systemInfo
- Publication number
- JPS5663219A JPS5663219A JP13879979A JP13879979A JPS5663219A JP S5663219 A JPS5663219 A JP S5663219A JP 13879979 A JP13879979 A JP 13879979A JP 13879979 A JP13879979 A JP 13879979A JP S5663219 A JPS5663219 A JP S5663219A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- gate
- ignition
- timing
- 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
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Engines (AREA)
Abstract
PURPOSE: To ensure an accurate detection of knocking, by resetting the holding signal of the noise level detecting means immediately after detection of occurrence of the knocking and then stopping temporarily the new sampling of the output singal of the vibration sensor.
CONSTITUTION: The 1st gate circuit 10 is turned on and off when the gate signal G1 supplied from the timing circuit 11 is at a high and low levels H and L respectively. And the timing and period during which the signal G1 becomes L are set so as to be identical to a fixed period right after the ignition. Thus the ignition noise N mixing into the signal Sa right after the ignition can be cut off and then eliminated by the 1st circuit 10. The 2nd gate circuit 5 and the averaging circuit 6 forming the noise level detecting circutit 4 are controlled by the gate signal G2 delivered from the timing circuit 11. The holding signal is average through the circuit 6, and the average value is held for the period during which the circuit 5 is turned off. And then the holding signal is reset with the rise of the signal G2.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13879979A JPS5663219A (en) | 1979-10-29 | 1979-10-29 | Knocking detecting system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13879979A JPS5663219A (en) | 1979-10-29 | 1979-10-29 | Knocking detecting system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5663219A true JPS5663219A (en) | 1981-05-29 |
Family
ID=15230494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13879979A Pending JPS5663219A (en) | 1979-10-29 | 1979-10-29 | Knocking detecting system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5663219A (en) |
-
1979
- 1979-10-29 JP JP13879979A patent/JPS5663219A/en active Pending
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