JPS5627634A - Knock detector - Google Patents
Knock detectorInfo
- Publication number
- JPS5627634A JPS5627634A JP10319679A JP10319679A JPS5627634A JP S5627634 A JPS5627634 A JP S5627634A JP 10319679 A JP10319679 A JP 10319679A JP 10319679 A JP10319679 A JP 10319679A JP S5627634 A JPS5627634 A JP S5627634A
- Authority
- JP
- Japan
- Prior art keywords
- output
- signal
- filter
- knock
- product
- 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
- Testing Of Engines (AREA)
Abstract
PURPOSE: To make output almost zero when there is no knock by passing knock signals through two filters whose characteristics are different from each other and taking the average of the product of their outputs.
CONSTITUTION: Output from a vibration pick-up 2 attached to an engine block 1 is amplified by an amplifier 3 and output x(t) (t represents time) is supplied to the input terminal of a filter 4. Output y(t) of the filter 4 is inputted together with x(t) to a multiplier 5 and multiplied there. Signal u(t) of the product thus obtained is averaged by an averaging circuit 6, becoming a discriminating signal m, and a discriminating circuit 7 discriminates the existence of knocks based on the magnitude of the signal m.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10319679A JPS5627634A (en) | 1979-08-15 | 1979-08-15 | Knock detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10319679A JPS5627634A (en) | 1979-08-15 | 1979-08-15 | Knock detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5627634A true JPS5627634A (en) | 1981-03-18 |
Family
ID=14347755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10319679A Pending JPS5627634A (en) | 1979-08-15 | 1979-08-15 | Knock detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5627634A (en) |
-
1979
- 1979-08-15 JP JP10319679A patent/JPS5627634A/en active Pending
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