A method for matching the kingpin caster angle and the kingpin inclination angle of a commercial vehicle with double front axles

Abstract

The invention discloses a double front axle commercial vehicle kingpin caster angle and kingpin inclination angle matching method. The double front axle commercial vehicle kingpin caster angle and kingpin inclination angle matching method is characterized in that active aligning torques and negative aligning drag torques of a first axle and a second axle are established, and according to the phase equilibrium of the active aligning torques and the negative aligning drag torques of the first axle and the second axle in a steering process, the relation of a residue steering angle related to a first axle kingpin inclination angle, a first axle kingpin caster angle, a second axle kingpin inclination angle and a second axle kingpin caster angle is established to obtain the relation of a residue yaw velocity related to the first axle kingpin inclination angle, the first axle kingpin caster angle, the second axle kingpin inclination angle and the second axle kingpin caster angle; the first axle kingpin inclination angle, the first axle kingpin caster angle, the second axle kingpin inclination angle and the second axle kingpin caster angle are taken as design variables, a proper change interval is selected, an optimization target is set, and a complex method is applied to looking for an optimal solution to constrain an optimization problem. The double front axle commercial vehicle kingpin caster angle and kingpin inclination angle matching method is simple, rapid and high in precision, and the designing and the adjustment of the double front axle commercial vehicle kingpin caster angles and main kingpin inclination angles can be effectively guided.

Description

technical field [0001] The invention belongs to the technical field of automobile design, and more specifically relates to a method for matching the kingpin caster angle and the kingpin inclination angle of a commercial vehicle with double front axles. Background technique [0002] The front axle structure and steering linkage of double-front-axle commercial vehicles are relatively complex, and the matching method for front wheel alignment parameters of ordinary single-axle vehicles cannot be directly applied to double-front-axle commercial vehicles. The caster angle and the kingpin inclination angle are important wheel alignment parameters. The unreasonable design of the caster angle and the kingpin inclination angle will lead to bad consequences such as poor centering performance and heavy steering during driving, which will directly affect the overall performance of the vehicle. handling stability. [0003] Therefore, in order to improve the handling stability of the veh...

AI Technical Summary

Problems solved by technology

The method relying on experience has blindness and poor accuracy. The simulation method takes a lot of time to model in the early stage, and the accuracy of the model directly affects the simulation results. Affected by environmental factors, it often takes a lot of time and effort and it is difficult to finally find a set of optimal values

Images