Vehicle driving force control device

A driving force control device for a vehicle, comprising:

• a motor configured to generate torque for the vehicle to travel by being supplied with electric power;
• an engine configured to combust fuel inside a cylinder to generate torque for the vehicle to travel;
• and
• a controller configured to receive an accelerator operation signal and output a control signal corresponding to the accelerator operation to the motor and the engine, wherein
• the controller sets a target torque of the vehicle corresponding to the accelerator operation, and distributes a target engine torque according to a predefined distribution rule, based on the target torque of the vehicle, and outputs a control signal corresponding to the target engine torque to the engine,
• during acceleration while in motion, the controller estimates a future amount of intake air to the cylinder at a predetermined time from a present time based on the target engine torque, and estimates a torque of the engine at the predetermined time based on the estimated future amount of intake air,
• during acceleration while in motion, the controller sets a target motor torque at the predetermined time based on the estimated torque of the engine at the predetermined time so that the target torque of the vehicle is achieved, and outputs a control signal corresponding to the target motor torque to the motor to synchronize a torque response of the engine with a torque response of the motor,
• when estimating the torque of the engine, the controller delays a torque change of the engine with respect to a change in the estimated future amount of intake air as an engine speed of the engine increases,
• the controller shortens a delay time of the torque change as the engine speed increases, and sets the delay time to zero when the engine speed is higher than a reference engine speed, and
• the controller sets control target values of a throttle valve, an injector, a spark plug, and an intake S-VT of the engine based on the target engine torque.