Multi-mode magneto-rheological vibration isolator for passenger car engine

Abstract

The invention discloses a multi-mode magneto-rheological vibration isolator of a passenger vehicle engine. The multi-mode magneto-rheological vibration isolator comprises an upper housing, a lower housing buckled with and fixed to the upper housing, a main rubber spring plugging an open position of the top end of the upper housing, a connecting rod penetrating through the main rubber spring, a rubber bottom membrane arranged at the bottom of the inner side of the lower housing and a magnetic core assembly arranged above the rubber bottom membrane and dividing the inner cavity of the vibrationisolator into an upper cavity and a lower cavity. The inner cavity of the vibration isolator is full of a magneto-rheological fluid, and the lower end of the connecting rod is coaxially and fixedly provided with a columnar elastomer. The magnetic core assembly comprises an extruding magnetic core fixed to the lower end of the elastomer, a cylindrical shell shaped inner magnetic core group conformally wrapping the extruding magnetic core in a spaced way, an outer magnetic ring sleeving the inner magnetic core group in the radial direction in a spaced way and a magnetic isolating assembly sleeving the outer magnetic ring and the inner magnetic core group. The vibration isolation frequency range of hydraulic suspension of the magneto-rheological fluid and the controllable dynamic stiffness range of suspension can be widened, and meanwhile the working reliability of the vibration isolator is also ensured.

Description

technical field [0001] The invention relates to a magnetorheological hydraulic mount for an engine, in particular to a multi-mode magnetorheological vibration isolator for a passenger car engine. Background technique [0002] The viscosity and yield stress of magnetorheological fluid can change with the change of the external magnetic field, and this change has the characteristics of fast, reversible and controllable. The magneto-rheological vibration isolator uses the characteristics of the magnetorheological fluid to change the output damping force of the magnetorheological hydraulic mount by controlling the current in the excitation coil to change the magnetic field strength, thereby attenuating the vibration of the engine. This process responds Rapid, continuous process, reversible. [0003] Existing magnetorheological mounts for automobile engine vibration isolation systems are generally composed of housings, rubber main springs, magnetic cores, rubber bottom films and...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a multi-mode magneto-rheological vibration isolator for passenger car engines. In order to solve the problem of small control range, without changing the external size of the existing magnetorheological mount, a magnetorheological hydraulic mount structure is proposed, which can broaden the vibration isolation frequency range of the magnetorheological hydraulic mount and the dynamic range of the mount. Stiffness controllable range, but also to ensure its reliable work

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