Engine ready signal using peak engine cylinder pressure detection

摘要

The present invention provides a method and system for determining "engine on" status in a Hybrid Electric Vehicle. A controller determines that the engine is necessary and then checks the current "engine on" status. If the engine is not currently running, the controller proceeds to start the engine by commanding the generator to spin or "motor" the engine. The controller then starts fuel and spark within the engine to create combustion. Measuring devices are then used to determine the ion current/breakdown voltage across a spark gap in the engine. The controller receives this measurement and determines whether the measured ion current/breakdown voltage exceeds a calibratable threshold. If the calibratable threshold is exceeded, combustion is occurring and the engine is on. The controller then turns on the "engine on" status flag.