| 摘要 |
PROBLEM TO BE SOLVED: To suppress wrong judgement of knock occurrence in a knock controller for an internal combustion engine by which the combustion condition of an engine is adjusted by adding a corrective amount to ignition timing according to knock judgement results, by adjusting a judgement level of knock detection according to the corrective amount of the ignition timing. SOLUTION: A knock detecting sensor 11 is arranged to an engine block, and also an intake air amount sensor 13 and a throttle opening sensor 12 are arranged in an intake system. These output signals are inputted to a control unit 10 together with the output signals of an air cylinder discriminating sensor 2 and magnetic sensors 5, 6, and a power transistor 9 or an injector 3 is controlled on the basis of ignition timing and an injection amount determined by engine information. Also, frequency analysis is executed so that the signal output of the knock detecting sensor 11 is divided into a plurality of frequency components, knock judgement is executed according to these outputs, and ignition timing is delayed, therefore an ignition signal is corrected. Further, at this time, knock detecting sensitivity is changed according to the corrective amount of the ignition timing. |
