Air spring type semi-active control hydraulic suspension

Abstract

An air spring type semi-active control hydraulic suspension comprises a suspension housing. A rubber main spring is disposed at one end of the suspension housing. A bottom tray is disposed at the other end of the suspension housing. The suspension housing is internally provided with an inertial passage and a decoupling chamber. A decoupling membrane is disposed inside the decoupling chamber and divides the decoupling chamber into a liquid chamber and a gas chamber. The liquid chamber is communicated with the inertial passage. The suspension housing is provided with a through hole communicated with the gas chamber; the inner wall of the through hole is in a cone frustum structure; the diameter of the inner wall of the outside of the through hole is larger than that of the inner wall of the inside of the through hole; the through hole is provided with a stopper in hermetic fit with the through hole; the suspension housing is provided with a drive mechanism which controls the stopper to axially move along the through hole. Compared with the prior art, the air spring type semi-active control hydraulic suspension has the advantages that vibration of wider frequency band can be absorbed, interior vibration and noise in various driving conditions can be effectively reduced, and an automobile is more comfortable.

Description

technical field [0001] The invention belongs to the technical field of hydraulic mounts, in particular to an air spring semi-active control hydraulic mount. Background technique [0002] At present, people have higher and higher requirements for vehicle ride comfort, so that the traditional passive powertrain mount cannot well meet the requirements of isolating engine vibration. Semi-active control hydraulic mounts can more effectively attenuate the transmission of engine vibration and noise to the interior of the vehicle. Compared with traditional passive mounts, semi-active control hydraulic mounts have very obvious advantages such as: using semi-active control to achieve low , High-frequency vibration isolation The best damping characteristics can effectively isolate the transmission of engine vibration and noise in a wide frequency band, especially the vibration when the engine is idling. The air spring type semi-active control hydraulic mount in the prior art is such a...

AI Technical Summary

Problems solved by technology

The air chambers of these two patents only have two states of open and closed, which correspond to the two states of high frequency and low frequency vibration respectively. The theory is that when the air chamber is supported, the deformation capacity of the decoupling membrane is reduced, and the liquid acts on the main force of the rubber. The force of the spring is large, which means that the dynamic stiffness of the suspension is large; when the air on the lower surface of the decoupling membrane is connected to the atmosphere, the deformation capacity of the decoupling membrane becomes larger, and the force of the liquid on the rubber main spring is small, which is expressed as the suspension. The dynamic stiffness is small; but in the actual use process, the vibration of the vehicle often gradually transitions from low frequency to high frequency, which makes the existing air spring semi-active control hydraulic mount absorb vibration between low frequency and high frequency The effect is poor, so that when the vehicle is in the driving condition between low frequency and high frequency, the vibration and noise in the vehicle are relatively large, so the absorbed vibration frequency band is narrow, which leads to poor comfort of the vehicle

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