JPS6483120A - Knocking detector - Google Patents
Knocking detectorInfo
- Publication number
- JPS6483120A JPS6483120A JP24123887A JP24123887A JPS6483120A JP S6483120 A JPS6483120 A JP S6483120A JP 24123887 A JP24123887 A JP 24123887A JP 24123887 A JP24123887 A JP 24123887A JP S6483120 A JPS6483120 A JP S6483120A
- Authority
- JP
- Japan
- Prior art keywords
- knocking
- signal
- circuit
- pulses
- ignitions
- 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
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Electrical Control Of Ignition Timing (AREA)
Abstract
PURPOSE:To detect knocking even in the high speed rotation region of an engine, by counting the number of the pulses from a comparing circuit over a plurality of ignitions and judging knocking when the number of pulses at a plurality of ignitions are a predetermined value or more. CONSTITUTION:A knocking gate circuit 8 (or noise gate circuit 9) gates the vibration signal (a) from a knocking sensor 1 from a knocking gate signal forming circuit 6 (or noise gate signal forming circuit 7) in synchronous relation to the rotation of an engine and extracts a vibration signal (b) [or (c)] within a range easy to generate knocking. The signal (c) is formed as the reference signal (d) of a noise level averaged by an amplifying offset rectifying and smoothing circuit 10. The levels of the signals (b), (d) are compared by a comparing circuit 11 and, when the level of the signal (b) is higher, a pulse signal (e) is generated and the number of the pulses from the circuit 11 are counted over a plurality of ignitions by a knocking judge means 12 and, when said numbers of the pulses are a predetermined value or more, knocking is judged. Therefore, even when the characteristic signal of knocking is out of the range of a knocking signal at one ignition, judge is performed as mentioned above and, therefore, knocking can be detected even in a high speed rotation region.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62241238A JPH06103217B2 (en) | 1987-09-25 | 1987-09-25 | Knock detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62241238A JPH06103217B2 (en) | 1987-09-25 | 1987-09-25 | Knock detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6483120A true JPS6483120A (en) | 1989-03-28 |
JPH06103217B2 JPH06103217B2 (en) | 1994-12-14 |
Family
ID=17071260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62241238A Expired - Lifetime JPH06103217B2 (en) | 1987-09-25 | 1987-09-25 | Knock detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06103217B2 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55143428A (en) * | 1979-04-26 | 1980-11-08 | Nissan Motor Co Ltd | Knocking discriminating unit |
JPS5638562A (en) * | 1979-09-04 | 1981-04-13 | Nissan Motor Co Ltd | Knocking control system |
JPS58187831A (en) * | 1982-04-27 | 1983-11-02 | Nec Corp | Knocking signal processing circuit |
-
1987
- 1987-09-25 JP JP62241238A patent/JPH06103217B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55143428A (en) * | 1979-04-26 | 1980-11-08 | Nissan Motor Co Ltd | Knocking discriminating unit |
JPS5638562A (en) * | 1979-09-04 | 1981-04-13 | Nissan Motor Co Ltd | Knocking control system |
JPS58187831A (en) * | 1982-04-27 | 1983-11-02 | Nec Corp | Knocking signal processing circuit |
Also Published As
Publication number | Publication date |
---|---|
JPH06103217B2 (en) | 1994-12-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment |
Free format text: PAYMENT UNTIL: 20071214 Year of fee payment: 13 |