Active control device for resisting saloon car braking forward bending

Abstract

The invention relates to an active control device for resisting saloon car braking forward bending, and belongs to the technical field of automobiles. The device comprises a pair of control mechanisms; the pair of control mechanisms comprises a front control mechanism and a rear control mechanism which are the same in structure; the control mechanism comprises a damper, a hydraulic oil cylinder, afirst reversing valve, a second 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 piston type hydraulic oil cylinder; the outer ends of piston rods of the hydraulic cylinders are fixedly connected with the outer ends of piston rods of dampers; in use, the front control mechanism is arranged between the front part of a frame and a front axle housing, and the rear control mechanism is arranged between the rear part of the frame and a rear axle housing. Opening andclosing of an electromagnetic valve in the hydraulic oil way are controlled through loosening and closing of a brake pedal, the device is driven to work, and therefore the timeliness of damping forceprovided by the magneto-rheological semi-active dampers is guaranteed, and the active control device for resisting saloon car braking forward bending is more stable and reliable in execution.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to an active control device for anti-braking and pitching forward of a car. [0002] technical background [0003] At present, some suspension designers mostly weaken the car's braking forward phenomenon by changing some geometric parameters of the vehicle, or by changing the position of the trim center. Through the theoretical analysis of the car's braking nose, we can know that the car's braking nose is related to the car's center of mass height, wheelbase, braking force distribution 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 can obtain the expected anti-dive effect by selecting the position of the pitch center. However, in order to reduce the impact force transmitted from the wheels to the car body, the selection of t...

AI Technical Summary

Problems solved by technology

However, affected by factors such as the suspension structure performance and the comfort of drivers and passengers, the above-mentioned invention has a limited ability to improve the braking forward, and it cannot completely eliminate the braking forward phenomenon of the car.

Another anti-vehicle braking device including a friction-type approaching separation force generating device uses friction to dissipate the energy of the vehicle's braking forward through thermal energy to weaken the phenomenon of vehicle braking nodding and realize vehicle braking. The coordinated control of the brake nodding suppression system and the braking system improves the comfort of the vehicle; however, this device has high requirements on the material performance of the friction generating device, and the high heat generated by friction will cause great damage to the friction material, and it cannot Completely eliminates the car's forward braking phenomenon

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