PROCESS AND DEVICE FOR RECOGNIZING SPARK FAILURES

摘要

A device for recognizing spark failures in an internal combustion engine has a sensor (15) for measuring the exhaust gas pressure and means (16, 17, 18) for recording the measurement value of the sensor during each cycle. Each exhaust gas pressure measurement value is compared with a corresponding expected value and an occurence signal is emitted when both values deviate from each other by more than a given difference. Means (21) for recognizing and processing failures determine the frequency of the occurrence signals and emit a failure signal when the frequency thus determined exceeds a threshold value. A warning light is switched on when the failure signal is emitted. This device for recognizing spark failures has a simple design, since the ignition in all cylinders of an internal combustion engine (11) can be monitored at the same time with a single sensor. The device can also detect failures in the exhaust gas duct (12), not only spark failures.