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A method for distributing stiffness of main and auxiliary leaf springs of automobile suspension

A technology of automobile suspension and spring stiffness, applied in the field of stiffness distribution of main and auxiliary leaf springs of automobile suspension, can solve the problems of high vibration frequency and poor comfort of the whole vehicle, achieve uniform vibration frequency, improve the performance quality of the whole vehicle and user satisfaction degree, avoid the effect of high vibration frequency

Active Publication Date: 2022-08-02
DONGFENG AUTOMOBILE COMPANY
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Problems solved by technology

[0003] At present, the stiffness distribution method of the main and auxiliary leaf springs mainly adopts the average load method and the proportional median method. The main spring stiffness distribution scheme determined by the average load method and the proportional median method has a relatively large stiffness of the main spring. When the vehicle is half-loaded or fully loaded The load-carrying smoothness is relatively good, but the vibration frequency of the whole vehicle is high when it is unloaded, and the comfort is poor

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  • A method for distributing stiffness of main and auxiliary leaf springs of automobile suspension
  • A method for distributing stiffness of main and auxiliary leaf springs of automobile suspension
  • A method for distributing stiffness of main and auxiliary leaf springs of automobile suspension

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Embodiment 1

[0051] see figure 1 , a method for distributing stiffness of main and auxiliary leaf springs of an automobile suspension, the distribution method including the following steps in sequence:

[0052] Step A: Make the vibration frequencies of the vehicle under full load and no-load conditions equal, and calculate the stiffness ratio between the main spring and the auxiliary spring of the vehicle suspension. stiffness, wherein the stiffness ratio of the main spring and the auxiliary spring is:

[0053]

[0054] In the above formula, C 1 main spring stiffness, C 2 is the secondary spring stiffness, P 0 is the bearing mass of the vehicle suspension under no-load condition, P m is the bearing mass of the vehicle suspension under full load conditions;

[0055] The total stiffness of the vehicle suspension is:

[0056]

[0057] In the above formula, N m is the vibration frequency under full load condition;

[0058] Step B. Calculate the target stiffness of the main spring...

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Abstract

A method for distributing the stiffness of the main and auxiliary leaf springs of an automobile suspension. First, the vibration frequencies of the vehicle under full load conditions and under no-load conditions are equalized, the stiffness ratio of the main spring and the auxiliary spring of the automobile suspension is calculated, and then the stiffness ratio is calculated. Obtain the target stiffness of the main spring and auxiliary spring of the automobile suspension. This design can ensure the uniform vibration frequency of the vehicle under no-load and full-load conditions, avoid excessive vibration frequency and poor comfort of the vehicle under no-load conditions, and make the vehicle have consistent ride comfort under no-load and full-load conditions. Significantly improve vehicle performance quality and user satisfaction.

Description

technical field [0001] The invention belongs to the technical field of automobile suspension leaf springs, and particularly relates to a stiffness distribution method of main and auxiliary leaf springs of automobile suspensions. Background technique [0002] Considering the structure and economy of the suspension system, the truck suspension usually adopts the main and auxiliary spring structure suspension with secondary stiffness. When the car is empty, only the main leaf spring participates in the work, and when the car is fully loaded, the main and auxiliary springs work. At the same time, participate in the work. If the stiffness of the main spring is too large, the no-load vibration frequency of the vehicle will be high, and the comfort will be poor. If the stiffness of the main spring is too small, the no-load bearing capacity of the vehicle will be too low, and the operating stability will be poor. It is especially important for the suspension of the auxiliary spring ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60G17/02
CPCB60G17/023
Inventor 洪光辉曾迥立彭振文李冉冯云君王海余平兰李元杰李航霍小娟陈刚毛梓权
Owner DONGFENG AUTOMOBILE COMPANY
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