A vehicle control device is configured to: execute a fuel cut control for stopping fuel supply to the internal combustion engine in response to a deceleration request to the vehicle; engage the lock-up clutch and open a throttle of the vehicle during the execution of the fuel cut control; close the throttle and execute the motor assist in a case where there is an acceleration request to the vehicle while the lock-up clutch is engaged, the throttle is opened, and the fuel cut control is executed; end the fuel cut control and resume fuel supply to the internal combustion engine when an intake pressure of the internal combustion engine reaches a predetermined startable negative pressure after the throttle is closed; and disengage the lock-up clutch when the fuel supply to the internal combustion engine is resumed.

A driving force control device for a vehicle is provided, which includes a motor, an engine, and a controller. The controller sets a target torque of the vehicle corresponding to accelerator operation, distributes a target engine torque, based on the target torque, and outputs a control signal corresponding to the target engine torque. The controller estimates a future amount of intake air to a cylinder based on the target engine torque, and estimates an engine torque after a setup time from the present time based on the estimated future amount of intake air. The controller sets a target motor torque after the setup time based on the estimated engine torque after the setup time so that the target torque is achieved, and outputs a control signal corresponding to the target motor torque to synchronize a torque response of the engine with a torque response of the motor.

A driving force control device for a vehicle is provided, which includes a motor, an engine, and a controller. The controller sets a target torque of the vehicle corresponding to accelerator operation, and distributes a target engine torque according to a distribution rule defined beforehand, based on the target torque of the vehicle, and outputs a control signal corresponding to the target engine torque to the engine. The controller estimates a future amount of intake air to a cylinder based on the target engine torque, and estimates a torque of the engine in the future based on the estimated future amount of intake air. The controller sets a target motor torque based on the estimated torque of the engine so that the target torque of the vehicle is achieved in the future, and outputs a control signal corresponding to the target motor torque to the motor.

Provided is a control device for a vehicle, the vehicle including an internal combustion engine, a generator, a battery, and a motor, in which, in a case where the internal combination engine is in operation under a state in which the internal combustion engine and the drive wheel are not mechanically connected to each other, when exhaust gas recirculation is performed and a number of rotations and a torque of the internal combustion engine are switched from a first state to a second state, and in which the control device determines whether to execute an assistance operation or a non-assistance operation.

A vehicle control device controls a vehicle that includes an internal combustion engine, an electric motor, and a drive wheel driven that is capable of starting the internal combustion engine by cranking of the electric motor. When the internal combustion engine is started by cranking of the electric motor, the vehicle control device is configured to: control a power running torque of the electric motor based on an intake pressure of the internal combustion engine until the internal combustion engine goes into a complete combustion state; and control a regenerative torque of the electric motor based on a fuel injection amount of the internal combustion engine until a rotation speed of the internal combustion engine converges within a predetermined range including a target rotation speed, after the internal combustion engine goes into the complete combustion state.

Systems for efficiently starting an engine of a hybrid electric vehicle are provided. An example of a system comprises a first processor and a second processor. The second processor is configured to determine when to start an internal combustion engine, cause energy to be supplied from an energy storage device to a generator/motor to cause the generator/motor and crankshaft to rotate to at least a hold speed, transmit a first instruction to a first processor when determining that the internal combination engine should be started. The first processor does not supply fuel to at least one cylinder of the internal combustion engine in response to the first instruction. The second processor is configured to transmit a second instruction to the first processor after a variable period of time has elapse after the generator/motor or crankshaft has reached at least the hold speed.

Methods and systems are provided for controlling an aspirator shut-off valve in an engine of a hybrid vehicle. One example method includes opening the aspirator shut-off valve following a shut-down command to the engine when engine speed is between a first engine speed and a second engine speed, the first engine speed being lower than an idle speed and the second engine speed occurring before an imminent engine stop. The example method further includes not opening the aspirator shut-off valve between the first engine speed and the second engine speed if an oxygen content of an emission control device is at or near a threshold.

A hybrid vehicle may include: an engine; a drive motor assisting a driving torque of the engine; an engine clutch selectively delivering power between the engine and the drive motor; a first intake valve disposed in a first intake line; a second intake valve disposed in a second intake line; a first electric supercharger disposed in the first intake line; a second electric supercharger disposed in the second intake line; a connecting valve disposed in a connecting line for connecting the first intake line and the second intake line; and a controller determining an operating mode among a plurality of operating modes of the first and the second electric superchargers based on a pressure ratio and a flow rate of the intake air supplied by each of the first and the second electric superchargers.

A hybrid vehicle may include: an engine; a drive motor assisting a driving torque of the engine; an engine clutch selectively delivering power between the engine and the drive motor; a first intake valve disposed in a first intake line; a second intake valve disposed in a second intake line; a first electric supercharger disposed in the first intake line; a second electric supercharger disposed in the second intake line; a connecting valve disposed in a connecting line for connecting the first intake line and the second intake line; and a controller determining an operating mode among a plurality of operating modes of the first and the second electric superchargers based on a pressure ratio and a flow rate of the intake air supplied by each of the first and the second electric superchargers.

A vehicle air-conditioning device is provided for controlling a vehicle air-conditioning of a vehicle in accordance with a control method. The air-conditioning compressor is stopped for a first time period after a brake pedal transitions from an operated state to a non-operated state when negative pressure inside a vacuum servo is insufficient relative to a predetermined pressure while an air-conditioning compressor is operating, and The air-conditioning compressor is stopped for a second time period after the acceleration pedal has come to be in a non-operated state when an acceleration pedal is operated before the first time period elapses.