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Four-wheel drive vehicle-based moment of force distribution control system

A control system, four-wheel drive technology, applied in the direction of control devices, vehicle components, other vehicle parameters, etc., can solve problems such as car insecurity

Inactive Publication Date: 2016-08-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the limit of road surface adhesion is broken, slippage will occur, and the lateral force of the outer front wheel will drop sharply. Obviously, this is an extremely unsafe working condition for a turning car
It can be seen that both differential braking control and traction control have defects

Method used

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Embodiment Construction

[0054] The invention provides a comprehensive torque distribution control system based on inter-axle driving torque control and wheel braking torque control under the steering working condition of a four-wheel drive vehicle. According to the vehicle turning, it can collect information such as the wheel speed, the longitudinal speed of the body center of mass, the yaw rate and the steering wheel angle signal through the sensor, and transmit it to the ECU to use its internal stored program to automatically calculate the actual and ideal speed difference of the front and rear axles. Limit and ideal yaw rate, analyze, judge, calculate and process various signals collected by sensors, generate signals to control the action of the executive system of the electronically controlled limited-slip differential and hydraulically controlled brakes, so as to ensure that the steering process of the vehicle safety and stability.

[0055] The present invention will be further described below i...

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Abstract

The invention discloses a four-wheel drive vehicle-based moment of force distribution control system. The four-wheel drive vehicle-based moment of force distribution control system comprises an ECU (Electronic Control Unit), wheel rotating speed sensors, a steering wheel rotating angle sensor, a vehicle body speed sensor, a hydraulic control brake, a yaw velocity sensor and an inter-axis electric control limited slip differential, wherein all of the wheel rotating speed sensors, the vehicle body speed sensor, the yaw velocity sensor and the steering wheel rotating angle sensor are connected with the input end of the ECU; both the inter-axis electric control limited slip differential and the hydraulic control brake are connected with the output end of the ECU. According to the four-wheel drive vehicle-based moment of force distribution control system, a vehicle shows high dynamic performance and operating stability after moment of force distribution comprehensive control and inter-axis moment of force distribution control are applied to the vehicle, so that the four-wheel drive vehicle-based moment of force distribution control system has high practicability in the application of improving the traction trafficability, the directional stability or the steering maneuverability of the vehicle.

Description

technical field [0001] The invention belongs to the field of steering stability control of a four-wheel drive vehicle, and in particular relates to a comprehensive torque distribution control system based on inter-axle drive torque control and wheel braking torque control under the steering working condition of a four-wheel drive vehicle. Background technique [0002] With the development of automobile technology, people have higher and higher requirements for various performances such as automobile power, handling stability and safety. The four-wheel drive technology can make full use of the adhesion of the wheels to obtain the greatest possible driving force, so more and more high-end cars and sports cars have begun to apply this technology. [0003] When the four-wheel drive vehicle is turning, the inter-axle torque distribution control technology is the key technology of the four-wheel drive vehicle. By controlling the torque distribution between the front and rear axles...

Claims

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Application Information

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IPC IPC(8): B60W30/045B60W40/114B60W10/188B60W10/14
CPCB60W10/14B60W10/188B60W30/045B60W40/114B60W2520/10B60W2520/14B60W2520/28B60W2530/00B60W2540/18B60W2552/40
Inventor 邓亚东舒绍文苏楚奇管灵
Owner WUHAN UNIV OF TECH
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