Förfarande för styrning av motormoment vid växling

摘要

Automatic gear changing in a mechanical stepped gearbox without clutch release in a motor vehicle involves the generation of a signal ( phi ) representing the torque transmitted in the gear box (6). This signal is driven to nil by the applied engine torque (M) being reduced so long as the signal is other than nil. Gear changing is executed when the signal has been driven to nil, thereby ensuring that the operative gear is disengaged quickly and gently. The signal used to represent the torque in the gearbox is a signal denoting the corresponding torsion ( phi ) of driveshafts (12) connected to the vehicle's driving wheels (14).