Measuring method for positioning parameter of vehicle front wheel

A technology for positioning parameters and measuring methods, applied in wheel testing, vehicle testing, measuring devices, etc., can solve problems such as difficult to determine the stop point, uncertain measurement starting point, small toe angle, etc., to achieve easy realization, easy measurement, The effect of small measurement error

Inactive Publication Date: 2005-07-27
刘鄂湘 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of this measurement method: First, the starting point of measurement cannot be determined
Because when the

Method used

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  • Measuring method for positioning parameter of vehicle front wheel
  • Measuring method for positioning parameter of vehicle front wheel
  • Measuring method for positioning parameter of vehicle front wheel

Examples

Experimental program
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Example Embodiment

1. The measurement method of the alignment parameters of the front wheel of the automobile:

First determine the vehicle coordinate system: select the origin as the intersection point of the main pin and the steering knuckle axis, the X axis is parallel to the front axis, the Y axis is consistent with the forward direction of the car, and the Z axis is the vertical direction, β 0 γ is the inclination angle of the kingpin structure, γ is the caster angle of the kingpin, δ is the steering angle of the front wheel of the car, and α is the camber angle of the tire;

Then measure the δ and α values ​​of three arbitrary positions: a). The forward direction of the car, assuming that the rotation angle of the front wheel at this time is δ 0 , measure the camber angle α at this time 0 ; b). Turn the front wheel to the right through an angle δ 01 , measure the camber angle α at this time 1 ,δ 1 = δ 01 + δ 0 ; c). Then turn the front wheel to the left through an angle δ 02 ,δ 02 ≥...

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Abstract

A method for measuring the positioning parameter of automobile front wheel includes using cross point of master pin and knuckle axis as point of origin to measure out and alpha for any three positions, measuring external angle of dip alpha at front wheel turnangles as delta o, measuring gamma at turnangle as delta o1 to right and measuring alpha at turnangle as beta o2 to left, substituting measured data to formula sin betao=*** and sin gamma=ay/(Cos*** to solve out internal angle of dip for master pin.

Description

technical field The invention relates to a method for measuring the alignment parameters of the front wheels of an automobile. Background technique With the development of the automobile industry and highways, the driving speed of automobiles is getting faster and faster, and the influence of its handling stability on driving safety is particularly important. The front wheel alignment parameters of the car have a great influence on its straight-line driving stability, light steering, reduced tire wear and reduced fuel consumption. Therefore, during the use of the car, its front wheel alignment parameters should always remain unchanged. However, people often find some faults caused by the misalignment of the front wheel alignment angle, such as heavy steering, front wheel swing, running deviation and abnormal tire wear. Therefore, it is necessary to use the front wheel alignment instrument to regularly detect the front wheel alignment parameters, so that problems can be ad...

Claims

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Application Information

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IPC IPC(8): G01B21/24G01B21/26G01M17/00G01M17/013
Inventor 刘鄂湘彭源
Owner 刘鄂湘
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