JPH0356849U

JPH0356849U -

Info

Publication number: JPH0356849U
Application number: JP11583789U
Authority: JP
Priority date: 1989-10-03
Filing date: 1989-10-03
Publication date: 1991-05-31

Description

[Brief explanation of drawings]

第１図は本考案の構成を示す機能ブロツク図、
第２図は本考案の一実施例を示すシステム図、第
３図は制御内容を示すフローチヤート、第４図は
従来の問題点を示す線図である。１…機関、２…ノツクセンサ、３…バンドパス
フイルタ、４…積分回路、６…マイクロコンピユ
ータ、７…点火栓、８…クランク角センサ、９…
エアフローメータ。 Figure 1 is a functional block diagram showing the configuration of the present invention.
FIG. 2 is a system diagram showing an embodiment of the present invention, FIG. 3 is a flowchart showing control details, and FIG. 4 is a line diagram showing conventional problems. DESCRIPTION OF SYMBOLS 1... Engine, 2... Knock sensor, 3... Bandpass filter, 4... Integrating circuit, 6... Microcomputer, 7... Spark plug, 8... Crank angle sensor, 9...
air flow meter.

Claims

[Scope of Claim for Utility Model Registration] A knock sensor that outputs a signal corresponding to engine vibration; A bandpass filter that passes the frequency component corresponding to the knock vibration of the signal from the knock sensor; An internal combustion engine comprising: an integrating circuit that integrates a signal in a predetermined crank angle section; and a knock determining means that compares the integral value of the integrating circuit with a predetermined slice level and determines that there is a knock when the value exceeds the slice level. The knock detection device includes: an engine rotation speed detection means for detecting the engine rotation speed; a load detection means for detecting the engine load; and a slice for setting the slice level in the knock determination means based on the engine rotation speed and the load. A knock detection device for an internal combustion engine, comprising: a level setting means;