A method for adjusting clutch fill command pressure for a transmission using a lubrication compensator model includes determining clutch fill line pressure and lubrication compensator model pressures, and adjusting the clutch fill command pressure to achieve the lubrication compensator model pressure based on the torque converter clutch status.

A vehicle includes a transmission having a torque converter, an oncoming clutch, and a controller. The controller is programmed to, in response to a torque of the oncoming clutch exceeding an estimated average by a threshold during an engagement, increase the torque of the oncoming clutch via a feedforward command and adjust the torque of the oncoming clutch via a feedback command to compensate for deviations in the torque generated by the feedforward command during the engagement.

A shift control device includes: a selector configured to receive operation of selecting a shift range of an automatic transmission and output selection information corresponding to the operation, the automatic transmission being configured to convert and output driving force of an engine; a range switch controller configured to switch the shift range in accordance with the selection information; a parking mechanism configured to bring the automatic transmission into a parking state by locking rotation of the automatic transmission; a clutch configured to turn on/off transmission of driving force; a clutch controller configured to control operation of the clutch in accordance with the selection information; and a delay setter configured to set delay time until driving of the parking pawl starts on the basis of rotation speed difference and oil temperature of the automatic transmission when selection information indicating that the parking range is selected is output.

An apparatus for controlling engagement of a clutch comprises at least one distance sensor adapted to provide a signal proportional to the movement of a gear selector in a gearbox along a path for selecting one gear ratio, a clutch engagement control unit adapted to gradually engage the clutch connected to the gearbox in response to the signal of the distance sensor and a clutch signal control unit adapted to receive the signal from the at least one distance sensor and to provide a corresponding control signal to the clutch engagement control unit. A method for controlling the engagement of a clutch comprises receiving a signal proportional to distance of a gear selection lever from the Neutral zone of a gearbox along at least one gear selection path of the gear selection lever and providing a control signal to a clutch control unit to control the engagement of said clutch in response to said signal proportional to the distance of the gear selection lever from the Neutral zone.