Method and device for measuring return friction resistance torque and return abnormity troubleshooting method

Abstract

The invention discloses a method and device for measuring return friction resistance torque and a return abnormity troubleshooting method. The measuring method is characterized in that a steering wheel to be measured of a vehicle is placed to a rotation disc rotating along a vertical axis; the steering wheel to be measured is fixedly connected with a lever arm extending to the radial direction of the rotation axis; the lever arm is applied with an acting force for driving the steering wheel to be measured to rotate; the direction of the acting force extends to the tangential direction of the circumference of the vertical axis; the minimum distance between the action point of the acting force on the lever arm and the vertical axis is L; and the magnitude of the acting force measured when the rotation disc rotates for a set angle is F, and the return friction resistance torque M=F*L can be obtained. Returnability quality which is different due to the magnitude of the friction force between a steering system and a bridge bearing can be accurately measured, and the method and device can be especially used for mass detection in vehicle production and vehicle reinspection.

Description

technical field [0001] The invention relates to a vehicle detection method and device for steering return performance. Background technique [0002] Automobile steering return performance is an important performance index of steering stability. There are many factors that affect the steering return performance. However, under the same front axle load and reasonable four-wheel alignment parameters, the magnitude of the active return torque provided by the system is certain. of. Therefore, the magnitude of the frictional resistance torque of the alignment inside the system will directly affect the steering wheel angle and the residual yaw rate of the vehicle after alignment. For the same vehicle model, due to differences in the manufacture and assembly of the steering shaft at both ends of the steering axle or product quality, the internal friction will be too large, or after the vehicle has been running for a period of time, factors such as the wear of the axle bearing or po...

AI Technical Summary

Problems solved by technology

However, the replacement of parts is very cumbersome and labor-intensive, and requires a large number of standard parts, which increases the operating cost. As a result, technicians cannot quickly investigate the root cause of the problem, and cannot quantify the frictional resistance torque of each part. Unable to prescribe the right medicine, resulting in an unnecessary huge amount of labor

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