Improvement of automotive engine vibration using semi active engine mount system

Nik Isna Zulkarnain , Nik Iskandar Ariff (2015) Improvement of automotive engine vibration using semi active engine mount system. Project Report. UTeM. (Submitted)

Text IMPROVEMENT OF AUTOMOTIVE ENGINE VIBRATION USING SEMI ACTIVE ENGINE MOUNT SYSTEM 24pages.pdf Restricted to Repository staff only until 1 January 2020. Download (293kB)

Abstract

The demand for low cost, quiet operation, and increased operator comfort in automobiles and other applications is requiring that new techniques be developed for noise and vibration isolation. One approach to reduce noise and vibration harshness is to develop a small low cost vibration isolator that can be used to mount components that generate vibration. To develop this isolator, passive, semi-active, and active control methods and different types of smart materials were studied. Based on this study, the most promising approach seems to be a semi-active magnetorheological isolator. An isolator of this type was designed to mount an engine on an automobile body and to isolate the body from high frequency vibration produced by the engine. This application is more difficult than the problem of isolating a component from vibration of a base because here vibration is also produced by the component. The progress results that this study provides are: (i) a fundamental dynamic Degree of Freedom (DOF) equation of passive and semi active mount system (ii) a simulation model of a semi-active control system with a magnetorheological isolator, and (iii) a conceptual design of the semi active engine mount from the previous research design. The isolator design proposed here must be durable enough to withstand low frequency vibration and shock loading through its base, and at the same time prevent transmission of high-frequency vibration from the component to the mounting structure.

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