Patent ID: 7238142
Filing Date: 2007-07-03
Classification: F16H,Y10T

Abstract:
1. A lock-up capacity control apparatus for a torque converter, the torque converter enabling a relative revolution between input and output elements of the torque converter to be limited and constituting a vehicular power train with a combination of an engine and an automatic transmission, the lock-up capacity control apparatus comprising: a controller configured to cause the torque converter to have a converter state in which the relative revolution between the input and output elements of the torque converter is free of limitation in a case where a lock-up capacity (L/Uprso) during a no-load state when the engine is switched into the no-load state is equal to or larger than a shock determining lock-up capacity (α), during an acceleration slip lock up in which the lock-up capacity of the torque converter is augmented by means of a time series control which accords with a load state of the engine, and to cause the torque converter to be oriented toward a lock-up state in which the relative revolution between the input and output elements of the torque converter is zeroed by continuing an augmentation of the lock-up capacity by means of the time series control in a case where the lock-up capacity during the no-load state is smaller than the shock determining lock-up capacity (α) during the acceleration slip lock up.