When a starter clutch slips, a wheel driving force is calculated based on a transmitting torque of the clutch obtained from not an engine torque but the clutch pressure (engagement force) of the starter clutch (S21-12), whereby a road gradient is calculate...

A clutch control apparatus includes a clutch disk (23), which is engaged with a flywheel (21), by means of a diaphragm spring (25); a release mechanism (including a rod and an electric motor (32)) for pressing a central portion of the diaphragm spring; and...