Granted Patent B2

US 12,728,733 · App. 18/856,657 · Granted Sep 8, 2026

Inventor: Bing Wei (Baoding, CN)

Assignee: GREAT WALL MOTOR COMPANY LIMITED

B60L15/2072B60L2240/421B60L2240/423B60L2240/461B60L2240/465B60L2240/48

Abstract

Claims (56)

1 . A slip control method, characterized in that the method comprises:

acquiring a wheel speed of each wheel of a vehicle in response to a working condition that the vehicle is in a launch starting execution stage;

determining a slip working condition of the vehicle according to the wheel speed of each wheel;

acquiring one or more motor operating parameters of the vehicle, and determining a slip output torque of the vehicle according to the slip working condition of the vehicle and the motor operating parameters; and

adjusting an actual output torque of the vehicle according to the slip output torque, and controlling a motor to operate at the adjusted actual output torque;

wherein the step of determining the slip working condition of the vehicle according to the wheel speed of each wheel comprises:

if a rotational speed difference between a rotational speed of a front wheel and a rotational speed of a rear wheel on any same side of the vehicle is greater than a first threshold, determining that the slip working condition of the vehicle is a wheel-on-one-side slip working condition; and

if a rotational speed of a left rear wheel of the vehicle is greater than a preset second threshold and a rotational speed of a right rear wheel of the vehicle is greater than a preset third threshold, determining that the slip working condition of the vehicle is a wheel-on-two-side slip working condition.

2 . The method according to claim 1 , wherein the step of acquiring the motor operating parameters of the vehicle, and determining the slip output torque of the vehicle according to the slip working condition of the vehicle and the motor operating parameters comprises:

if the slip working condition of the vehicle is the wheel-on-one-side slip working condition, acquiring a real-time rotational speed of the motor and a gear request;

determining a target torque gradient according to a motor rotational speed level to which the real-time rotational speed of the motor belongs and a gear request type; and

acquiring an initial output torque of the vehicle, and correcting the initial output torque according to the target torque gradient to obtain a slip output torque in the wheel-on-one-side slip working condition.

3 . The method according to claim 2 , wherein the step of determining the target torque gradient according to the motor rotational speed level to which the real-time rotational speed of the motor belongs and the gear request type comprises:

if the gear request is an upshift request, determining a loading torque gradient with a corresponding level according to the motor rotational speed level; and

if the gear request is a downshift request, determining an unloading torque gradient with a corresponding level according to the motor rotational speed level,

wherein the motor rotational speed level is matched with a level of the loading torque gradient and a level of the unloading torque gradient, the unloading torque gradient changes linearly with a change of the motor rotational speed level, and the loading torque gradient changes linearly with the change of the motor rotational speed level.

4 . The method according to claim 1 , wherein the step of acquiring the motor operating parameters of the vehicle, and determining the slip output torque of the vehicle according to the slip working condition of the vehicle and the motor operating parameters comprises:

if the slip working condition of the vehicle is the wheel-on-two-side slip working condition, acquiring an operating current of the motor in a steady state working condition; and

acquiring a slip output torque in the wheel-on-two-side slip working condition according to the operating current of the motor in the steady state working condition and preset motor parameters.

5 . The method according to claim 4 , wherein a calculation formula of acquiring the slip output torque in the wheel-on-two-side slip working condition according to the operating current of the motor in the steady state working condition and preset motor parameters is as follows:

T

rq

=

n

p

[

Φ

f

⁢

i

q

+

(

L

d

-

L

q

)

⁢

i

d

⁢

i

q

]

,

wherein T rq is the slip output torque, n p is a quantity of pole pairs of the motor, Φ f is a flux linkage of a permanent magnet, L d is a d-axis inductance of a stator winding, L q is q-axis inductance of the stator winding, i d is a d-axis current of the motor in the steady state working condition, and i q is a q-axis current of the motor in the steady state working condition.

6 . The method according to claim 1 , wherein the step of adjusting the actual output torque of the vehicle according to the slip output torque comprises:

calculating a torque difference between the slip output torque and a target output torque;

if the torque difference is greater than a fourth threshold, determining the slip output torque as the actual output torque; and

if the torque difference is less than or equal to the fourth threshold, determining the target output torque as the actual output torque.

7 . A non-transitory computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the method according to claim 1 is implemented.

8 . An electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus;

the memory is configured to store a computer program; and

the processor is configured to, when executing the computer program stored in the memory, implement the method according to claim 1 .

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (13)