Ignition timing control apparatus for internal combustion engines
AssigneeNippon Soken, Inc.
InventorsTadashi Hattori, Hiroaki Yamaguchi, Yoshinori Ootsuka
Life of this patent
Estimating the term…
Abstract
An ignition timing control apparatus for internal combustion engines is constructed to retard or advance the spark time of an engine when a knocking detector in the ignition timing control apparatus detects the occurrence or non-occurrence of knocking in the engine, respectively, and to retard the spark time by a predetermined angular value irrespective of an output signal from the knocking detector when a failure occurring in the knocking detector has been detected. Further, the ignition timing control apparatus may comprise alarm means which is actuated when a failure occurring in the knocking detector has been detected.
Claims8
An ignition timing control apparatus for internal combustion engines comprising:
- a knocking detector for detecting vibrations corresponding to a knocking phenomenon occurring in an engine and for producing an output signal responsive thereto;
- a knocking detecting circuit for detecting a knocking condition of said engine in response to said output signal from said knocking detector and for producing a detection signal responsive thereto;
- a correcting advance angle operating circuit for retarding and advancing the ignition timing of said engine in response to said detection signal from said knocking detecting circuit which indicates the occurrence and non-occurrence of knocking, respectively;
- failure detecting means for detecting the occurrence of a failure in said knocking detector in accordance with said output signal thereof;
- and
- ignition timing retarding means for retarding the ignition timing by predetermined angular value irrespective of the output signal from said knocking detector when said failure detecting means has detected the occurrence of a failure in said knocking detector.
An ignition timing control apparatus for internal combustion engines comprising:
- a knocking detector for detecting vibrations corresponding to a knocking pehnomenon occurring in an engine and for producing an output signal responsive thereto;
- a knocking detecting circuit for detecting a knocking condition of said engine in response to said output signal from said knocking detector and for producing a detection signal responsive thereto;
- a correcting advance angle operating circuit for retarding and advancing the ignition timing of said engine in response to said detection signal from said knocking detecting circuit which indicates the occurrence and non-occurrence of knocking, respectively;
- failure detecting means for detecting the occurrence of a failure in said knocking detector in accordance with said output signal thereof;
- ignition timing retarding means for retarding the ignition timing by a predetermined angular value irrespective of the output signal from said knocking detector when said failure detecting means has detected the occurrence of a failure in said knocking detector;
- and
- alarm means being actuated when said failure detecting means has detected the occurrence of a failure in said knocking detector.
An ignition timing control apparatus for internal combustion engines comprising:
- a knocking detector for detecting vibrations corresponding to a knocking pehnomenon occurring in an engine and for producing an output signal responsive thereto;
- means for detecting the operating condition of said engine;
- means responsive to said output signals of said knocking detector and said engine operating condition detecting means for controlling the engine ignition timing, said engine ignition timing controlling means including;
- means for determining the ignition timing in accordance with the output signal of said engine operating condition detecting means;
- knocking detecting means for detecting a knocking condition of said engine in response to said output signal from said knocking detector and for producing a detection signal responsive thereto;
- correcting means for retarding and advancing the ignition timing of said engine in response to said detection signal from said knocking detecting means which indicates the occurrence and non-occurrence of knocking, respectively;
- failure detecting means for detecting the occurrence of a failure in said knocking detector in accordance with the output signal of said knocking detector;
- and
- ignition timing retarding means for retarding the ignition timing by a predetermined angular value irrespective of said output signal of said knocking detector when said failure detecting means has detected the occurrence of a failure in said knocking detector.
Dependencies are inferred from the claim text.