JPS5627634A - Knock detector - Google Patents

Knock detector

Info

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
Application number
JP10319679A
Other languages
Japanese (ja)
Inventor
Yasushi Ishii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP10319679A priority Critical patent/JPS5627634A/en
Publication of JPS5627634A publication Critical patent/JPS5627634A/en
Pending legal-status Critical Current

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  • 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
JP10319679A 1979-08-15 1979-08-15 Knock detector Pending JPS5627634A (en)

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)

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