Computerised control of motor vehicle drive assembly - allows engine-to-flywheel transmission clutch to be re-engaged in circumstances not incurring waste of fuel

摘要

The control computer economises on fuel by decoupling and stalling the engine for suitable periods while propulsion is maintained by the flywheel, until the driver restores normal working by depressing the accelerator pedal through a given angle and/or at a given rate. To exclude the possibility of a skilled driver deliberately shortening the overrun period by premature pedal depression, the gearbox output shaft speed and gear lever position are measured continuously and a desired accelerator pedal position is read out from memory. The clutch can be re-engaged earlier if the actual pedal position corresponds. ADVANTAGE - The clutch between the engine and flywheel can be engaged in the overrun mode only without engine-braking effect.