Torque control method and torque control device
AssigneeNissan Motor Co., Ltd.
InventorsTakahisa KUROSAWA, Yohei NAKAMURA
Life of this patent
Estimating the term…
Abstract
A torque control method for controlling torque of a motor, comprises detecting request of speed control requested from a driver by using a sensor, calculating a request torque based on the request, performing, controlling torque generated at the motor based on the request torque, when the request torque is smaller than a predetermined torque threshold value, a coast traveling control for setting the request torque to zero and controlling the motor based on the request torque which is set to zero.
Claims9
A torque control method for controlling torque of a motor, comprising:
- detecting request of speed control requested from a driver by using a sensor;
- calculating a request torque based on the request;
- controlling torque generated at the motor based on the request torque;
- and
- performing, when the request torque is smaller than a predetermined torque threshold value, a coast traveling control for setting the request torque to zero and controlling the motor based on the request torque which is set to zero,
- wherein the predetermined torque threshold value when rotation speed of the motor is greater than a first rotation speed threshold value, is greater than the predetermined torque threshold value when the rotation speed of the motor is smaller than the first rotation speed threshold value.
(canceled)
A torque control device, comprising:
- an accelerator-opening sensor for detecting an accelerator opening;
- a rotation speed sensor for detecting rotation speed of a motor;
- a memory for storing a map indicating a relative relationship between torque of the motor, the rotation speed, and the accelerator opening;
- and
- a controller for controlling the motor,
- wherein, the controller
- calculates the torque which corresponds to the accelerator opening and the rotation speed as a request torque from a driver while referencing the map,
- controls the motor so that generation torque generated at the motor match with the request torque when the request torque is greater than a predetermined torque threshold value, and
- controls the motor so that the generation torque becomes zero by setting the request torque to zero when the request torque is smaller than the predetermined torque threshold value, and
- the predetermined torque threshold value when rotation speed of the motor is greater than a first rotation speed threshold value, is greater than the predetermined torque threshold value when the rotation speed of the motor is smaller than the first rotation speed threshold value.
Dependencies are inferred from the claim text.