A system comprises a powertrain including an engine configured to output torque to a driveline, and an electronic control system operatively coupled with the powertrain. The electronic control system is configured to determine an engine torque value, and control a component of the driveline in response to the engine torque value. The engine torque value may account for an effect of air-fuel ratio (AFR) on engine torque. The engine torque value may account for an effect of charge transport delay on engine torque

A control device of a hybrid vehicle including an engine, an electric motor coupled to a power transmission path between the engine and drive wheels, and a clutch connecting/disconnecting a power transmission path between the engine and both the electric motor and the drive wheels, the control device performing detection of air-fuel ratio variation between cylinders of the engine, the control device changing an operation state of the clutch based on a request drive force of the vehicle, and the control device performing the detection of air-fuel ratio variation when the clutch is in an open state or a slip amount of the clutch is equal to or larger than a preset value.

A clutch control system includes a clutch, and a control unit. The control unit includes one or more processors, and one or more memories configured to store an executable instruction(s). The one or more processors are configured, in accordance with the instruction, to: acquire an engine torque; based on the engine torque, calculate a base transmission torque of the clutch; calculate a first transmission torque of the clutch by limiting, based on a first limiting condition, an amount of change of the base transmission torque; based on the first transmission torque, control the clutch; during return from a fuel cut, calculate a second transmission torque of the clutch by limiting the amount of change of the base transmission torque based on a second limiting condition that is more limiting than the first limiting condition; and, during return from the fuel cut, control the clutch based on the second transmission torque.

A clutch control system includes a clutch, and a control unit. The control unit includes one or more processors, and one or more memories configured to store an executable instruction(s). The one or more processors are configured, in accordance with the instruction, to: acquire an engine torque; based on the engine torque, calculate a base transmission torque of the clutch; calculate a first transmission torque of the clutch by limiting, based on a first limiting condition, an amount of change of the base transmission torque; based on the first transmission torque, control the clutch; during return from a fuel cut, calculate a second transmission torque of the clutch by limiting the amount of change of the base transmission torque based on a second limiting condition that is more limiting than the first limiting condition; and, during return from the fuel cut, control the clutch based on the second transmission torque.

A basic pulse time setting section determines a basic pulse time for initial invalid stroke elimination by applying current values of oil temperature and throttle opening to the basic pulse time map. A subtraction time setting section determines a subtraction time by applying current values of oil temperature and clutch oil pressure to the subtraction time map. A pulse time determining section determines a predetermined initial invalid stroke elimination pulse time by subtracting the subtraction time from the basic pulse time. An initial invalid stroke elimination permission/inhibition determination section, at a starting timing of initial invalid stroke elimination, inhibits this-time initial invalid stroke elimination if the elapsed time from the execution timing of the preceding initial invalid stroke elimination is within the predetermined inhibition period.

A mechanical front wheel drive roller wedging control system includes a 4WD switch in a vehicle operator station, a roller cage drag mechanism electrically activated by the 4WD switch and providing a drag on a roller cage if the 4WD switch is in an on position, and a throttle pedal switch actuated by the throttle pedal and that deactivates the roller cage drag mechanism when the throttle pedal is released. In an alternative embodiment, a controller may deactivate the roller cage drag mechanism when a throttle position sensor or engine speed sensor is below a minimum value.

A method of controlling a damper pulley clutch for selectively transmitting power of an engine to engine accessories, may include determining, by a controller, whether a vehicle is driven in a fuel-cut mode under deceleration of the vehicle and controlling the damper pulley clutch, by the controller, to be engaged upon determining that the vehicle is driven in the fuel-cut mode and to be disengaged upon determining that the vehicle is not driven in the fuel-cut mode.

A mechanical front wheel drive roller wedging control system includes a 4WD switch in a vehicle operator station, a roller cage drag mechanism electrically activated by the 4WD switch and providing a drag on a roller cage if the 4WD switch is in an on position, and a throttle pedal switch actuated by the throttle pedal and that deactivates the roller cage drag mechanism when the throttle pedal is released. In an alternative embodiment, a controller may deactivate the roller cage drag mechanism when a throttle position sensor or engine speed sensor is below a minimum value.

A method of controlling a damper pulley clutch for selectively transmitting power of an engine to engine accessories, may include determining, by a controller, whether a vehicle is driven in a fuel-cut mode under deceleration of the vehicle and controlling the damper pulley clutch, by the controller, to be engaged upon determining that the vehicle is driven in the fuel-cut mode and to be disengaged upon determining that the vehicle is not driven in the fuel-cut mode.

A control apparatus for an automatic transmission including a torque converter with a lock-up clutch capable of connecting the output shaft of an engine and the input shaft of the automatic transmission includes a state determination unit configured to determine, based on an operation signal from an ABS device, whether the ABS device of a vehicle is in a normally operating state or in a fail state, a rotation speed determination unit configured to determine whether the rotation speed of the input shaft is not less than a reference rotation speed, and an operation control unit configured to control engagement of the lock-up clutch based on the operation state of the ABS device and the result of comparison between the rotation speed of the input shaft and the reference rotation speed.