Braking control method in regenerative braking cooperative control
AssigneeHyundai Motor Company
InventorsIn Su Kim, Sang Hyup Lee
Life of this patent
Estimating the term…
Abstract
A braking control method includes steps of: (i) confirming whether to enter a blending section where regenerative braking torque is reduced and friction braking torque is increased; (ii) determining a target reduced deceleration by a controller upon entering the blending section; (iii) reducing braking torque of a vehicle in response to the determined target reduced deceleration; and (iv) returning the braking torque of the vehicle to driver's requested braking torque when the vehicle is being stopped.
Claims20
A braking control method in regenerative braking cooperative control, the method comprising:
- confirming whether to enter a blending section where regenerative braking torque is reduced and friction braking torque is increased;
- determining a target reduced deceleration by a controller upon entering the blending section, the target reduced deceleration being determined only when vehicle speed is less than or equal to a predetermined reference vehicle speed and when vehicle deceleration is less than or equal to a predetermined reference deceleration;
- reducing braking torque of a vehicle in response to the determined target reduced deceleration;
- and
- returning the braking torque of the vehicle to a driver's requested braking torque when the vehicle is being stopped.
A brake controller for a vehicle, the brake controller comprising:
- a processor;
- and
- a non-transitory computer-readable storage medium storing code to be executed by the processor, the code including instructions for a braking control method in regenerative braking cooperative control, the method comprising:
- confirming whether to enter a blending section where regenerative braking torque is reduced and friction braking torque is increased;
- determining a target reduced deceleration by a controller upon entering the blending section;
- reducing braking torque of the vehicle in response to the determined target reduced deceleration;
- and
- returning the braking torque of the vehicle to a driver's requested braking torque when the vehicle is being stopped, wherein returning the braking torque of the vehicle to the driver's requested braking torque comprises determining whether a predetermined waiting time elapses after the vehicle stops and when the waiting time elapses, returning the braking torque to the driver's requested braking torque.
A vehicle comprising:
- a drive motor;
- a battery coupled to the drive motor to supply power to the drive motor;
- a differential gear;
- vehicle wheels operatively coupled to the differential gear, wherein the drive motor, battery, differential gear and vehicle wheels are configured so that a rotational force generated from the drive motor by the battery is transmitted to the vehicle wheels via the differential gear;
- a braking system coupled to the vehicle wheels;
- a controller configured to control the braking system, the controller configured to:
- confirm whether to enter a blending section where regenerative braking torque is reduced and friction braking torque is increased;
- determine a target reduced deceleration upon entering the blending section, the target reduced deceleration being determined only when vehicle speed is less than or equal to a predetermined reference vehicle speed and when vehicle deceleration is less than or equal to a predetermined reference deceleration;
- reduce braking torque of the vehicle in response to the determined target reduced deceleration;
- and
- return the braking torque of the vehicle to a driver's requested braking torque when the vehicle is being stopped.
Dependencies are inferred from the claim text.