System and Method for Improving Handling Stability of Four-Wheel Hub Motor Drives

A technology for handling stability and in-wheel motors, which is used in electrical devices, driving interaction, and control driving, etc., and can solve problems such as poor vehicle dynamics and lateral stability, wheel slippage, and vehicle cornering.

Active Publication Date: 2021-01-08
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When a four-wheel hub motor drives a pure electric vehicle on a low-adhesion road, the wheels are prone to slip. Once slip occurs, the vehicle's dynamic performance and lateral stability will deteriorate rapidly, and in severe cases, it will cause the vehicle to sideways or even roll over. , thereby threatening the personal safety of drivers and passengers

Method used

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Embodiment Construction

[0016]The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0017]Such asfigure 1 The system shown for improving the driving stability of a four-wheel hub motor includes a driving torque decision module, a torque optimization module, and a slip control module. The vehicle controller in the driving torque decision module is based on the collected driver Accelerator pedal input, brake pedal input, gear input, steering wheel angle input, vehicle speed, power battery voltage value, power battery current value, four-wheel hub motor torque, four-wheel hub motor speed, perform logical operations to identify the driver's driving Intention information, driving intention information includes vehicle acceleration information, vehicle deceleration information and vehicle turning information, and calculates (VCU calculates the electrical output torque of the hub according to the accelerator pedal opening and the brake pedal open...

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Abstract

The invention discloses a system used for enhancing four-wheel hub motor drive control stability. Control yaw moment is obtained by a driving moment decision module through calculation; a moment optimization module is dynamically distributed to the front and rear shafts of a vehicle based on the four-wheel hub motor total target moment of the expectation of a driver according to a front and rear shaft load distribution principle, and front and rear shaft distribution moment and differential torsional yaw moment are distributed to four driving wheels; and a wheelspin control module formulates wheelspin torque dynamic compensation control logic of the vehicle under the working conditions such as single wheel wheelspin, same side wheelspin, coaxial wheelspin and multi-wheel wheelspin according to the driving intention information of the driver, and a spinning wheel cannot spin by distributing yaw moment. Thus, the stability and safety of the vehicle can be enhanced.

Description

Technical field[0001]The present invention relates to the technical field of in-wheel motor vehicle control technology, in particular to a system and method for improving the driving stability of a four-wheel in-wheel motor.Background technique[0002]In-wheel motor technology is also called in-wheel motor technology. Compared with traditional centralized-driven internal combustion engines or electric motors, in-wheel motors adopt distributed drive, integrating driving, transmission and braking devices into the hub, omitting clutch, transmission, Transmission parts such as transmission shaft, differential, transfer case. Therefore, the mechanical parts of pure electric vehicles are greatly simplified. Pure electric vehicles equipped with in-wheel motors have the characteristics of independent four-wheel control and easy measurement of the torque of the in-wheel motors. By using the precise and easy-to-obtain characteristics of the torque and speed of the in-wheel motors, more vehicle ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B60L15/20B60L15/32
CPCB60L15/20B60L15/32B60L2220/42B60L2220/44B60L2240/12B60L2240/24B60L2240/421B60L2240/423B60L2240/486B60L2240/547B60L2240/549B60L2250/26Y02T10/72
Inventor张泽阳史建鹏赵春来王秋来李洪涛
OwnerDONGFENG MOTOR CORP HUBEI