A control device for a vehicle is provided. The vehicle includes an engine, an accessory, a continuously variable transmission, and a lock-up clutch. The control device includes an electronic control unit. The electronic control unit is configured to: when the load state is less than a predetermined value, control the speed ratio of the continuously variable transmission and the rotational speed of the engine such that the rotational speed of the engine during engagement of the lock-up clutch is kept at a first rotational speed; and when the load state is greater than or equal to the predetermined value, control the speed ratio of the continuously variable transmission and the rotational speed of the engine such that the rotational speed of the engine during engagement of the lockup clutch becomes a second rotational speed higher than the first rotational speed.

A vehicle includes an engine, a continuously variable transmission, an engine stop system, and a brake system. The brake system is configured to control a braking force of the wheel based on an operation state of a brake operating portion that is operated by a driver. The brake system includes a braking force adjusting device. The braking force adjusting device includes an actuator and an electronic control unit. The actuator is configured to adjust a braking force of the wheel. The electronic control unit is configured to, when the engine stop system stops the driving of the engine, control the actuator such that slip of a belt of the belt-type continuously variable transmission relative to the pulley becomes less than or equal to a predetermined allowable limit.

A vehicle includes an engine, a continuously variable transmission, an engine stop system, and a brake system. The brake system is configured to control a braking force of the wheel based on an operation state of a brake operating portion that is operated by a driver. The brake system includes a braking force adjusting device. The braking force adjusting device includes an actuator and an electronic control unit. The actuator is configured to adjust a braking force of the wheel. The electronic control unit is configured to, when the engine stop system stops the driving of the engine, control the actuator such that slip of a belt of the belt-type continuously variable transmission relative to the pulley becomes less than or equal to a predetermined allowable limit.

A driving control mechanism includes: a motor that is coupled to a driving wheel; a transmission that is coupled to the driving wheel; and an internal combustion engine that is coupled to an input shaft of the transmission. In a first state in which a driving force of the motor is transmitted to the driving wheel and a driving force of the internal combustion engine is not transmitted to the driving wheel, the transmission reduces a transmission gear ratio to a value less than a target transmission gear ratio according to a requested driving force when a transition request to a second state in which driving forces of the motor and the internal combustion engine are transmitted to the driving wheel is issued. The motor increases a driving force to be transmitted to the driving wheel when the transition request is issued.

A driving control mechanism includes: a motor that is coupled to a driving wheel; a transmission that is coupled to the driving wheel; and an internal combustion engine that is coupled to an input shaft of the transmission. In a first state in which a driving force of the motor is transmitted to the driving wheel and a driving force of the internal combustion engine is not transmitted to the driving wheel, the transmission reduces a transmission gear ratio to a value less than a target transmission gear ratio according to a requested driving force when a transition request to a second state in which driving forces of the motor and the internal combustion engine are transmitted to the driving wheel is issued. The motor increases a driving force to be transmitted to the driving wheel when the transition request is issued.

A power transmission device for a hybrid vehicle has a first clutch device (1a) disposed in a drivetrain between an engine (E) and a driving wheel (D). A second clutch device (1b) disposed in a drivetrain extends from a motor (M) to the driving wheel (D). The oil pump (P), connected to the motor (M), supplies oil to a predetermined moving component disposed in the vehicle by using driving power of the motor (M). A transmission (A) is disposed in a drivetrain between the engine (E) and the motor (M) and the driving wheel (D). The transmission adjusts rotation speed of the motor (M). The power transmission device supplying oil by causing the motor (M) to rotate the oil pump (P) at an appropriate rotation speed.

A startup control device includes a vehicle temperature sensor configured to sense a temperature of the vehicle, a vehicle startup controller configured to select the second vehicle startup mode in a low temperature state in which the temperature of the vehicle is equal to or smaller than at least a first temperature judgment value when the request of the startup of the vehicle is sensed, and to select the third vehicle startup mode in an extremely low temperature state in which the temperature of the vehicle is equal to or smaller than a second vehicle temperature judgment value which is smaller than the first temperature judgment value when the request of the startup of the vehicle is sensed.

A startup control device includes a vehicle temperature sensor configured to sense a temperature of the vehicle, a vehicle startup controller configured to select the second vehicle startup mode in a low temperature state in which the temperature of the vehicle is equal to or smaller than at least a first temperature judgment value when the request of the startup of the vehicle is sensed, and to select the third vehicle startup mode in an extremely low temperature state in which the temperature of the vehicle is equal to or smaller than a second vehicle temperature judgment value which is smaller than the first temperature judgment value when the request of the startup of the vehicle is sensed.

A controller includes a control unit which is configured to execute a coast stop control. The coast stop control is configured to perform automatic stopping of the drive source while the vehicle is traveling, when a permitting condition is satisfied, the permitting condition including a condition that a speed ratio R of the variator is lower than a first threshold R1 while the lock-up clutch is in an engaged phase. The control unit is configured to prohibit execution of the coast stop control in a case in which an input-output rotation speed difference of the torque converter is equal to or more than a predetermined value when the lock-up clutch is in the engaged phase.

A first target secondary pulley pressure Psteng is calculated based on an output torque Teng of an engine, and then an offset value Psteng+PO is calculated by adding a predetermined offset PO to the first target secondary pulley pressure Psteng. The first target secondary pulley pressure Psteng is outputted as a target secondary pulley pressure Ps(n) when a target secondary pulley pressure Ps(n−1) in a previous control cycle is less than or equal to the first target secondary pulley pressure Psteng; the offset value Psteng+PO is outputted as the target secondary pulley pressure Ps(n) when the target secondary pulley pressure Ps(n−1) in the previous control cycle is greater than or equal to the offset value Psteng+PO; and otherwise, the target secondary pulley pressure Ps(n−1) in the previous control cycle is outputted as the target secondary pulley pressure Ps(n), thereby suppressing an oscillation in the target secondary pulley pressure Ps(n).