Electric vehicle control system
An electric vehicle control system includes a traction control portion, a wheel torque control portion, a front motor control portion, and a rear motor control portion. The traction control portion controls the traction of each of a plurality of wheels. The wheel torque control portion controls the torque of each of the plurality of wheels by setting a request torque for each of a plurality of rotary electric machines that transmit and receive the torque to and from the plurality of wheels. The front motor control portion and the rear motor control portion control operations of a front motor and a rear motor. The wheel torque control portion relatively prioritizes an operation of the wheel torque control portion over an operation of the traction control portion in accordance with an idling state of at least one of the plurality of wheels.
1 . An electric vehicle control system, comprising:
a first control portion that controls a traction of respective ones of a plurality of wheels;
a second control portion that controls a torque of the respective ones of the plurality of wheels by setting a requested torque for respective ones of a plurality of rotary electric machines that at least one of transmit the torque to or receive the torque from, the plurality of wheels;
a plurality of rotary electric machine control portions that control an operation of the respective ones of the plurality of rotary electric machines in response to a command input from the first control portion and the second control portion; and
a cooperation control portion that relatively prioritizes an operation of the second control portion over an operation of the first control portion in accordance with an idling state of at least one of the plurality of wheels, wherein the cooperation control portion comprises the second control portion, and wherein the second control portion performs the operation of the second control portion prior to the operation of the first control portion in response to the idling state.
2 . The electric vehicle control system according to claim 1 , wherein the plurality of rotary electric machine control portions are provided individually so as to correspond to the respective ones of the plurality of rotary electric machines.
3 . The electric vehicle control system according to claim 1 , wherein the cooperation control portion relatively prioritizes the operation of the second control portion over the operation of the first control portion, by changing a second determination threshold value that determines whether or not it is necessary to operate the second control portion with respect to the idling state, in accordance with a first determination threshold value that determines whether or not it is necessary to operate the first control portion with respect to the idling state.
4 . The electric vehicle control system according to claim 3 , wherein the first control portion controls the traction of the respective ones of the plurality of wheels by setting a target rotation speed for the respective ones of the plurality of rotary electric machines, and wherein the second control portion sets a torque distributed to the respective ones of the plurality of wheels in accordance with the requested torque, requested from a driver.
5 . The electric vehicle control system according to claim 2 , wherein the cooperation control portion relatively prioritizes the operation of the second control portion over the operation of the first control portion, by changing a second determination threshold value that determines whether or not it is necessary to operate the second control portion with respect to the idling state, in accordance with a first determination threshold value that determines whether or not it is necessary to operate the first control portion with respect to the idling state.
6 . The electric vehicle control system according to claim 5 , wherein the first control portion controls the traction of the respective ones of the plurality of wheels by setting a target rotation speed for the respective ones of the plurality of rotary electric machines, and wherein the second control portion sets the requested torque distributed to the respective ones of the plurality of wheels in accordance with a torque requested from a driver.
7 . The electric vehicle control system according to claim 1 , wherein the operation of the first control portion is an operation of decreasing an overall torque of a vehicle, and wherein the operation of the second control portion is an operation of changing the torque of the respective ones of the plurality of wheels without decreasing the overall torque of the vehicle.