A method for a vehicle includes receiving a shift schedule for a transmission of a vehicle, the shift schedule indicating when shift events occur based on operation of the vehicle. The method further includes receiving vehicle operation data during operation of the vehicle. The method further includes determining a power to overcome vehicle losses based on the vehicle operation data. The method further includes determining an adjustment to the shift schedule to optimize a vehicle operating parameter based on the determined power to overcome vehicle losses and implementing the adjustment to the shift schedule.

A method for a vehicle includes receiving a shift schedule for a transmission of a vehicle, the shift schedule indicating when shift events occur based on operation of the vehicle. The method further includes receiving vehicle operation data during operation of the vehicle. The method further includes determining a power to overcome vehicle losses based on the vehicle operation data. The method further includes determining an adjustment to the shift schedule to optimize a vehicle operating parameter based on the determined power to overcome vehicle losses and implementing the adjustment to the shift schedule.

A vehicle includes an engine and a vehicle park mechanism. The vehicle further includes a controller configured initiate an auto-stop of the engine in response to an auto-stop condition. The controller is further configured to actuate the vehicle park mechanism in response to a driver exit condition and the engine being auto-stopped.

A seat belt attachment determining unit of a rough terrain vehicle determines whether or not a seat belt is being worn by a vehicle occupant. In the case it is determined by the seat belt attachment determining unit that the vehicle occupant is wearing the seat belt, the ECU switches a transmission gear stage of an automatic transmission using a first speed change mode. On the other hand, in the case it is determined by the seat belt attachment determining unit that the vehicle occupant is not wearing the seat belt, the ECU switches the transmission gear stage using a second speed change mode.

A seat belt attachment determining unit of a rough terrain vehicle determines whether or not a seat belt is being worn by a vehicle occupant. In the case it is determined by the seat belt attachment determining unit that the vehicle occupant is wearing the seat belt, the ECU switches a transmission gear stage of an automatic transmission using a first speed change mode. On the other hand, in the case it is determined by the seat belt attachment determining unit that the vehicle occupant is not wearing the seat belt, the ECU switches the transmission gear stage using a second speed change mode.

An object of the present invention is to provide a vehicle parking lock system that realizes a parking lock with a positive user perception, and enables energy and cost reductions without complex control and with a simple configuration. The object is achieved by a selectable clutch configured to be switchable between four operating modes and provided to one of an input shaft, an output shaft, and an intermediate shaft of a transmission. The operating mode of the selectable clutch is controlled based on detection signals of a plurality of sensors to prevent an unintended movement of the vehicle when the vehicle is stationary.

An object of the present invention is to provide a vehicle parking lock system that realizes a parking lock with a positive user perception, and enables energy and cost reductions without complex control and with a simple configuration. The object is achieved by a selectable clutch configured to be switchable between four operating modes and provided to one of an input shaft, an output shaft, and an intermediate shaft of a transmission. The operating mode of the selectable clutch is controlled based on detection signals of a plurality of sensors to prevent an unintended movement of the vehicle when the vehicle is stationary.

Provided is a method of securing a safe state of a vehicle transmission and avoiding deterioration of drivability without restricting a function of the vehicle transmission when a ROM failure is detected in a controller for a vehicle transmission. A software program is duplicated in a unit of control with identical contents, and when a ROM failure is detected, same control as a normal operation is performed by alternative control of control at the ROM failure site.

Provided is a method of securing a safe state of a vehicle transmission and avoiding deterioration of drivability without restricting a function of the vehicle transmission when a ROM failure is detected in a controller for a vehicle transmission. A software program is duplicated in a unit of control with identical contents, and when a ROM failure is detected, same control as a normal operation is performed by alternative control of control at the ROM failure site.

A vehicle control device includes an actuator drive control section that controls drive of an actuator, a main motor drive control section that controls drive of a main motor, and a stagnation determination section. The stagnation determination section determines a stagnation of the actuator based on a detected value of a sensor unit that detects a physical quantity that changes according to a drive state of the actuator. When performing a meshing surface pressure reduction control for reducing a meshing surface pressure generated at the meshing point between a parking gear and a parking lever by driving the main motor, the main motor drive control section decreases a main motor torque which is a torque of the main motor based on the detected value of the sensor unit.