Automobile steering transmission ratio fluctuation calculation and evaluation method

By constructing a steering system model and employing dual rotary joint modeling and parametric phase angle adjustment, the problem of limited steering ratio optimization in the platform development of car manufacturers was solved, and rapid and accurate evaluation of transmission ratio fluctuations and performance optimization were achieved.

CN122365697APending Publication Date: 2026-07-10CHERY INTELLIGENT VEHICLE TECH (HEFEI) CO LTD
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Patent Information

Application Number
CN202610310299.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-13
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

When automakers develop multiple models on a platform, the steering system has multiple hard points, which limits the optimization of the steering ratio and makes it difficult to quickly and effectively assess the fluctuation of the ratio.

Method used

A steering system model was constructed using a dual rotary joint model, including upper fork, lower fork, and column adjustment modeling. By adjusting the parameterized phase angle and column position, the universal joint structure of the real vehicle was simulated, and the transmission ratio fluctuation was quickly adjusted.

Benefits of technology

It enables rapid and accurate assessment of steering ratio fluctuations without altering the human-machine interface hardpoints, improving the accuracy of simulation results and achieving universality and performance balance across different vehicle models.

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Abstract

The invention relates to the technical field of steering transmission ratio fluctuation calculation and evaluation, in particular to an automobile steering transmission ratio fluctuation calculation and evaluation method, which comprises the following steps of: constructing an ADAMS improved steering system model which respectively comprises upper yoke modeling, lower yoke modeling and tubular column adjustment modeling; during specific modeling, double revolute pairs are adopted for modeling, namely, a first Revolute pair and a second Revolute pair are adopted; obtaining a front suspension model and simulation boundary conditions; assembling a front suspension model and the steering system model; simulation operation is carried out, and an instantaneous steering transmission ratio fluctuation curve is obtained; performing multi-dimensional evaluation based on the instantaneous steering transmission ratio fluctuation curve; whether the phase angle is adjusted or not is judged through a multi-dimensional evaluation result, so that the real object structure of the steering intermediate shaft universal joint can be simulated, and the situation that a simulation result does not conform to reality is avoided.
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