Spark ignited internal combustion engine and a control system therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 9, 1991
Grant Date -
N/A
app pub date -
Apr 9, 1990
filing date -
May 5, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spark ignited internal combustion engine is disclosed in which at least one of the inlet tracts of the engine has an optical knock sensor in the form of an infra-red temperature sensor located in it. The infra-red temperature sensor is positioned to sense by viewing past an inlet valve means associated with the respective inlet tract at least during part of the induction stroke of the respective cylinder of the engine the temperature of the upper surface of the respective piston. A control system for such an engine is also disclosed in which the output from the infra-red temperature sensor is supplied to an electronic control unit. The electronic control unit operates so as to adjust the ingition timing of the engine in response to the signal received from the infra-red temperature sensor.
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