Trim angle vibration control device for four-wheel drive passenger vehicle

A four-wheel drive, passenger vehicle technology, applied in vehicle components, transportation and packaging, elastic suspension, etc., can solve problems such as limited improvement ability, high material performance requirements, and inability to completely eliminate the phenomenon of car braking nodding, etc. achieve the effect of simple structure
CN112297747AActive Publication Date: 2021-02-02HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2021-02-02

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Abstract

The invention relates to a trim angle vibration control device for a four-wheel drive passenger vehicle, and belongs to the technical field of automobiles. The control device comprises a front damper,a rear damper, a hydraulic oil cylinder, an electromagnetic reversing valve, an oil pump and a hydraulic oil tank, and a hydraulic control loop is formed. The damper is a magneto-rheological semi-active damper; the hydraulic oil cylinder is a double-piston-rod hydraulic oil cylinder; the outer ends of two piston rods of the hydraulic oil cylinder are fixedly connected with the outer ends of piston rods of the two dampers respectively; when in use, the control device is arranged between a front axle housing and a rear axle housing. The corresponding working current is applied by detecting therandomly changed longitudinal acceleration of the vehicle to obtain the proper damping force, so that the resultant moment of the front wheel and the rear wheel at the trim center is always in a balanced state when the vehicle runs at a variable speed, and the trim vibration phenomenon caused when the vehicle runs at the variable speed can be completely eliminated theoretically.
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Description

technical field

[0001] The invention belongs to the technical field of automobiles, and in particular relates to a pitch angle vibration control device for a four-wheel drive passenger car.

[0002] technical background

[0003] When the vehicle is running at variable speeds, the pitch angle of the vehicle will change with the change of the vehicle acceleration, which will cause the vibration of the pitch angle. Theoretical analysis of the brake pitch and drive back of a wheel-drive passenger car, we can know the brake pitch and drive back of the passenger car and the height of the center of mass, wheelbase, and braking force distribution of the passenger car coefficient and the position of the pitch center, when the center of mass height, wheelbase, braking force distribution coefficient and other parameters are selected, the suspension designer usually obtains the expected anti-braking pitch and anti-pitch by selecting the position of the pitch center. drive pitch. Howeve...

Claims

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