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A method for controlling steering performance

A control method and handling performance technology, which is applied in the field of controlling powertrain to improve steering handling performance, and can solve problems such as understeer, weakening of driver's cornering confidence, and reduction of front wheel adhesion

Active Publication Date: 2020-12-04
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the process of acceleration and turning, because the center of gravity of the vehicle moves backward, the adhesion of the front wheels is reduced, resulting in understeer. Usually, the driver will constantly correct the steering, or reduce the oil to brake, so as to keep the vehicle to complete the steering according to the established route. First, it will weaken the driver's cornering confidence and increase the frequency of manipulation

Method used

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  • A method for controlling steering performance
  • A method for controlling steering performance
  • A method for controlling steering performance

Examples

Experimental program
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Effect test

Embodiment

[0032] A control flow of a steering maneuverability control method, such as figure 1 Shown:

[0033] S1: The ECU detects the change of the steering angle signal every 50ms.

[0034] S2: When the direction angle signal Sta appears to exceed 10° from left to right, the ECU enters the next step of judgment, and returns to S1 if it does not appear.

[0035] S3-S4: ECU judges based on vehicle speed V, engine torque Te, accelerator opening Ap, brake signal Br, and target gear Gt, and executes the next step if the requirements are satisfied, otherwise returns to S1.

[0036] In the present invention, in order to ensure the drivability of the vehicle, the acceleration, steering and torque reduction control will limit the action conditions, specifically including:

[0037] The vehicle speed V function requirement is 10kph-120kph,

[0038] The target gear Gt has not changed,

[0039] Engine torque Te greater than 4%,

[0040] Accelerator opening Ap is greater than 5%,

[0041] The...

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Abstract

The invention provides a steering maneuverability control method. The steering maneuverability is improved by using engine torque. According to the steering maneuverability control method, after a vehicle entering a set steering condition is detected, an engine torque control link is conducted, an expected torque request is found out and carried out according to a present directional rotary angleand throttle opening, and after the request is completed, natural torque is restored; and when one of following set situations occurs in the torque request detecting process, torque control is automatically terminated, and a next-time steering wheel angle monitoring program is carried out. According to the steering maneuverability control method, the engine torque is used for changing gravity center of the vehicle, the tendency of vehicle insufficient steering is further restrained or reduced, the fluency of driving in steering maneuver can be improved, and frequency of active steering wheel maneuver of a driver is actively reduced.

Description

technical field [0001] The invention relates to the steering control technology, in particular to the technology of controlling the power assembly to improve the steering performance. Background technique [0002] Automobile steering performance is an important performance of automobiles. Customers are highly aware of it, and good handling performance will allow drivers to have high-level driving pleasure while reducing fatigue caused by frequent manipulation. At present, the improvement of steering performance is mainly from the optimization of the steering system itself. The overall technology is relatively mature, and there are certain limitations in the improvement of steering performance. For example, in the process of acceleration and turning, because the center of gravity of the vehicle moves backward, the adhesion of the front wheels is reduced, resulting in understeer. Usually, the driver will constantly correct the steering, or reduce the oil to brake, so as to ke...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/045
Inventor 姜震黄俊王文飞田云曹桂荣曾天微
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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