| 摘要 |
PURPOSE:To protect an engine body and a catalytic converter by installing a controller for judging misfire by comparing the pressure value in a combustion chamber, at two crank-angle positions, having the compression top dead center as center. CONSTITUTION:Misfire judgement is performed by a controller 20 consisting of a digital computer on the basis of the detected outputs of a pressure sensor 12 and a crank-angle sensor 14 which are installed onto an engine body 1, and the result is informed to a driver through an indication lamp 2. The output of the pressure sensor 12 is input into a misfire judging calculation apparatus 22 through an A/D converter 23. A crank-angle sensor 14 A/D-converts the signal of the pressure sensor 12 at each prescribed angle and starts the interruption for taking-in the signal. Therefore, the engine body or a catalytic converter can be protected by informing the driver of abnormally by urging inspection. |
