초록 ▼

Misfire is detected in an internal combustion engine during its starting mode by analyzing the engine speed profile. Average speed is determined for 60°increments of crankshaft rotation. If an increment midway between top dead center positions has a higher speed than the previous increment and a hig

Misfire is detected in an internal combustion engine during its starting mode by analyzing the engine speed profile. Average speed is determined for 60°increments of crankshaft rotation. If an increment midway between top dead center positions has a higher speed than the previous increment and a higher speed than cranking speed, combustion occurred, otherwise a misfire occurred. When misfires are detected for a particular cylinder the calculated fuel allotment for that cylinder is reduced in accordance with the number of consecutive misfires for that cylinder.

대표청구항 ▼

The method of detecting misfire in an internal combustion engine during start up comprising the steps of: sensing first engine speeds at positions midway between top dead center positions and second engine speeds at positions between each midway position and the previous top dead center position, du

The method of detecting misfire in an internal combustion engine during start up comprising the steps of: sensing first engine speeds at positions midway between top dead center positions and second engine speeds at positions between each midway position and the previous top dead center position, during initial cranking, storing first speeds as cranking speed, and comparing the first speed with the second speed during the combustion period of each cylinder and with the cranking speed whereby a failure to increase speed over the cranking speed and over the second speed denotes misfire for that cylinder.