| 摘要 |
PURPOSE:To prevent erroneous detection of knocking because of making low knocking sensor output during fuel cutting a knock judgement level at the time of carrying out knocking control of an engine. CONSTITUTION:At the time when fuel cut control is not carried out, reading of a knocking sensor is prohibited by closing a knock gate for a specified period of time (KGT) after output of an ignition timing signal. Thereafter, existence of knocking generation is judged by comparing output value of the knocking sensor in a specified detection period A after this KGT passes with a standard level set in a detection period B less influenced by normal combustion. Subsequently, at the time when the fuel cut control is being carried out, reading of detected value of the knocking sensor is prohibited in the whole period. |
