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Impact acceleration sensitive valve for shock absorber

A technology of sensitive valves and shock absorbers, which is applied in the field of vehicle vibration reduction, can solve problems such as unresolvable technical contradictions, restrictions on the improvement of vehicle ride comfort, and the inability to distinguish working conditions with a single state variable, so as to increase the suspension reset speed and reduce suspension. The effect of improving the vehicle ride comfort and attitude stability

Inactive Publication Date: 2020-01-17
CHINA NORTH VEHICLE RES INST
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

A single state variable cannot distinguish working conditions, so the above-mentioned technical contradictions cannot be resolved, which restricts the improvement of vehicle ride comfort

Method used

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  • Impact acceleration sensitive valve for shock absorber
  • Impact acceleration sensitive valve for shock absorber
  • Impact acceleration sensitive valve for shock absorber

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Such as Figure 1-Figure 3 As shown, the sensitive valve of this embodiment is installed on the bottom valve assembly of the shock absorber. The bottom valve assembly is used to control the flow between the working chamber and the compensation chamber, which has a crucial influence on the compression damping of the shock absorber.

[0052] The valve stem in this sensitive valve is connected with the shock absorber housing and the wheel through the bottom valve assembly. When the wheel is subjected to a strong impact from the ground, the valve stem will move upwards, and the slider will move relatively due to inertia. The valve stem moves downward, so that the radial through hole of the slider communicates with the radial through hole of the valve stem. It is equivalent to the increase of the orifice area between the high pressure chamber and the compensation chamber of the shock absorber, the decrease of the pressure difference between the high and low pressure chamber...

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Abstract

The invention belongs to the technical field of vehicle shock absorption, and particularly relates to an impact acceleration sensitive valve. The impact acceleration sensitive valve is installed on abottom valve between a working cavity and a compensation cavity of the shock absorber, and adopts a spring mass system composed of a compressed spring and a slide block for sensing impact loads on a vehicle from the pavement, and thus the purpose of judging the working condition is achieved; a hole between the slide block and a valve rod is utilized for achieving communication of a high-pressure cavity of the shock absorber, unloading of the high-pressure cavity of the shock absorber can be achieved when the shock absorber meets intense impact of the pavement, so that impact transmitted to a vehicle body by the shock absorber is reduced, and the requirement of different working conditions for damping is met. According to the impact acceleration sensitive valve, a favorable condition is created for symmetric design of damping of the shock absorber. Compression damping is increased, stretching damping is lowered, the improvement of the posture of a vehicle is facilitated, a suspension isrestored in time, and the smoothness and handling stability of the vehicle are comprehensively improved. The impact acceleration sense valve is compact in structure, high in manufacturability and controllable in cost.

Description

technical field [0001] The invention belongs to the technical field of vehicle vibration damping, and in particular relates to an impact acceleration sensitive valve for a vibration damper. Background technique [0002] In addition to the function of damping the free vibration of the vehicle body, the shock absorber in the vehicle suspension also has the function of transmitting force. Different force transmission conditions require different damping. When the vehicle is in rapid steering, acceleration, braking and other working conditions, in order to prevent large changes in the attitude of the vehicle body, it is hoped that the shock absorber will output large damping and transmit large supporting force to prevent the relative movement between the vehicle body and the wheels. For off-road vehicles, large damping is also conducive to reducing the probability of "suspension breakdown" and suppressing vehicle pitching vibration. Many military vehicles set higher compression...

Claims

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Application Information

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IPC IPC(8): F16F9/34F16F9/504
CPCF16F9/34F16F9/504
Inventor 雷强顺冯占宗阴运宝韩庆房强张春生刘捷
Owner CHINA NORTH VEHICLE RES INST
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