| 摘要 |
A method for recognizing misfires in a piston-type internal-combustion engine with spark ignition and an engine control unit (ECU) for actuating electromagnetic actuators to operate the cylinder valves. The time difference between the opening time preset by the engine control unit and the actual opening time of an exhaust valve is detected as the actual value, then compared to a preset tolerance-time difference as the nominal value, and a signal is generated if this nominal value is not met, i.e., the nominal value exceeds the actual value.
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