Double-liquid-chamber liquid resistance suspension

Abstract

The invention relates to a double-liquid-chamber liquid resistance suspension and aims to provide a suspension system capable of reducing vibration caused by interference stimulus within multiple frequency band ranges. The liquid resistance suspension mainly comprises an external rubber main spring, an upper connecting bolt connected with the main spring, a supporting spring, an external upper liquid chamber, an external lower liquid chamber, an internal upper liquid chamber, an internal lower liquid chamber, an upper liquid chamber and lower liquid chamber separation plate, an internal rubber main spring, an internal inertia channel, an internal rubber membrane and an external rubber membrane. An external liquid chamber inertia channel and the internal liquid chamber inertia channel which are independent of each other are formed in the upper liquid chamber and the lower liquid chamber separation plate. The external upper liquid chamber and the external lower liquid chamber are communicated through an external inertia channel, and the internal upper liquid chamber and the internal lower liquid chamber are communicated through the internal inertia channel. The density of liquid in the external liquid chambers and the density of liquid in the internal liquid chambers can be different. Through the double-liquid-chamber liquid resistance suspension, vibration of an engine in multiple frequency bands can be reduced, the noise reduction effect and vibration damping effect of the engine liquid resistance suspension can be improved, and the fatigue performance and the creep property of the liquid resistance suspension can be improved.

Description

technical field [0001] The invention relates to a supporting structure of an engine, in particular to an engine fluid resistance mount. Background technique [0002] The engine assembly suspension system refers to the elastic connection system between the engine power assembly and the vehicle body. The quality of the system design directly affects the ride comfort of the vehicle. However, with the lightweight design of the vehicle, especially the application of the poorly balanced four-cylinder engine in the front-engine-front drive type of vehicle, the impact of the powertrain on the ride comfort of the vehicle is increasing. The vehicle powertrain is both a vibration source and an object to be isolated. [0003] As a vibration isolation component in the automotive powertrain suspension system, the rubber mount once played an important role. At present, it is still used as a vibration isolation component in a well-balanced engine. However, the dynamic characteristics of r...

AI Technical Summary

Problems solved by technology

However, the dynamic characteristics of rubber suspension components have two shortcomings: the vibration damping is too small, which cannot meet the vibration isolation and damping performance requirements of the vehicle powertrain suspension system in the low frequency domain; The hardening phenomenon leads to a significant increase in its dynamic stiffness, which cannot meet the vibration isolation and noise reduction performance requirements of the automotive powertrain mount system in the high frequency domain

[0006] To sum up, in the existing passive hydraulic mounts, when two disturbance excitations are generated by the vehicle, a typical passive liquid mount can only isolate one disturbance excitation, resulting in poor vibration isolation performance. Cannot effectively attenuate the vibration generated by the engine, increase the cavity resonance noise in the passenger compartment, and affect the driving and riding comfort of the vehicle

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