Clutch biting point monitoring system

摘要

A clutch biting point (CBP) monitoring system comprises an engine management electronic control unit which measures and/or estimates vehicle engine torque and acceleration. When the clutch is fully disengaged there is a direct relationship between the torque produced by the engine and its rotational acceleration, hence the clutch biting point is monitored by detecting, in a predetermined time period, a significant loss in the proportionality between measured engine torque and measured engine rotational acceleration. A clutch pedal sensor has means to determined the velocity of the clutch pedal as it moves towards the clutch biting point and is used to compensate for any delays between the clutch reaching the biting point and the time taken for the monitoring system to detect biting point.