| 摘要 |
PURPOSE:To prevent an over delayed angle or an over advanced angle even if there is a cylinder which is likely to knock by calculating ignition timing through the operation of the control delayed angle amount in the control range stored in advance about the cylinder where knocking is generated. CONSTITUTION:A distinguishing means B for distinguishing a stroke of each cylinder based on a detection signal of a crank angle sensor A which detects revolutional angle of a crank shaft is provided. Also, a knock detecting circuit D which detects whether or not knocking is generated based on an output signal of a knock sensor C is provided. Moreover, A memory device E which stores the upper limit value and the lower limit value of the control delay angle amount of the basic ignition timing and each cylinder is provided. And the cylinder where knocking is generated is distinguished in an operating means F based on the output of the distinguishing means B and the knock detecting circuit D, and ignition timing is calculated by each cylinder by operating the control delayed angle amount in the controlled range stored in the memory device E, and an ignition device H is controlled through an output circuit G based on the calculated result. |
