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A vehicle body stability control system for an electric vehicle

A technology of body stability and control system, applied in electric vehicles, control drive, brakes, etc., can solve problems such as safety hazards and electric vehicle control

Inactive Publication Date: 2016-10-05
吴刚 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no effective method to control the body stability of electric vehicles, so there are certain safety hazards

Method used

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  • A vehicle body stability control system for an electric vehicle
  • A vehicle body stability control system for an electric vehicle
  • A vehicle body stability control system for an electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] figure 1 It is a schematic diagram of a body stability control system for an electric vehicle provided in Embodiment 1 of the present invention. Such as figure 1 As shown, it mainly includes:

[0021] Sensor unit 100, vehicle electronic control unit ECU111, acceleration unit 106, braking unit 107, motor controller 109 and in-wheel motor 110;

[0022] Wherein, the sensor unit 100 is used to collect vehicle speed, wheel speed, yaw rate, lateral acceleration and steering wheel angle information of the vehicle;

[0023] The acceleration module 106 is configured to send an acceleration signal to control the vehicle to accelerate;

[0024] The braking module 107 is configured to send a braking signal to control the vehicle to run slowly;

[0025] The vehicle ECU unit 111 is configured to calculate the expected yaw rate based on the two-degree-of-freedom steering dynamics model based on the information collected by the sensor unit 100 and the signals sent by the accelerati...

Embodiment 2

[0045] In order to facilitate understanding of the present invention, below in conjunction with figure 2 The present invention is further described.

[0046]In the embodiment of the present invention, the vehicle stability control system consists of a vehicle ECU unit, wheel speed sensors of four wheels, a vehicle yaw acceleration sensor, a vehicle lateral acceleration sensor, a steering wheel angle sensor, an acceleration unit, a braking unit, and an in-wheel motor and its The controller is composed of the sensor. The sensor is mainly responsible for providing the actual state signal of the vehicle movement. The vehicle ECU unit is responsible for the calculation of the model and is responsible for sending the control command signal of the vehicle stability control system. The hub motor and the motor controller are mainly responsible for controlling the speed and torque of the wheel. control and slip rate control, and active braking control to ensure that the car can run sta...

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Abstract

The invention discloses an automobile body stability control system for an electric automobile. A hierarchical control structure is adopted for the system. An upper layer controller aims at achieving yaw stability control, wherein the yawing moment required in the whole automobile movement process needs to be calculated, required signals are provided by sensors, and the required yawing moment can be calculated according to the signals and is compared with the practical value. The control target of a lower layer controller is achieved by ensuring that yawing moment instructions sent by the upper layer controller are distributed through braking force, wherein the lower layer controller controls motor moment distribution and the slip rate of wheels so that the required yawing moment can be obtained for an automobile and the automobile can stably run.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles and their control, in particular to a body stability control system of an electric vehicle. Background technique [0002] In today's increasingly severe energy shortage and increasingly serious environmental pollution, the development of electric vehicles is the general trend, and rear-wheel drive electric vehicles have also become a research hotspot. [0003] The narrow and long single-row electric vehicle with front and rear seats is a new type of electric vehicle. It has the characteristics of fast, agile and small. It is not only suitable for urban travel, high passability, convenient parking, but also has the high speed and endurance of traditional vehicles. A new electric vehicle trend. [0004] The vehicle stability control system is very important for rear-wheel drive electric vehicles. Its main function is to ensure the stability and controllability of the vehicle when turnin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/1755B60L15/28
CPCY02T10/72
Inventor 吴刚石春王江安秦琳琳毛俊鑫
Owner 吴刚
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