Method for Improving Idling Vibration Isolation Performance of Front Mount of Family Car Engine

Abstract

The invention provides a method for improving the idling vibration isolation performance of the front mount of a family car engine, which belongs to the field of vibration and noise control; the five steps of the method are respectively (1) confirming the engine according to the number of cylinders and the idle speed of the specific family car engine Vibration frequency; (2) Select specific hole aluminum or its composite material as the added vibration isolation material according to the confirmed engine vibration frequency; (3) Select the deformation length of the newly added vibration isolation material component according to the compression curve of hole aluminum or its composite material (4) Match the energy dissipation coefficient and energy absorption coefficient according to the principle of maximizing the vibration level difference or insertion loss; (5) Determine the final effective method of idling vibration isolation for the car engine front mount according to the bench screening test results. The vibration isolation effect is measured by vibration level drop or insertion loss. The method improves the vibration isolation effect of the front suspension of the 4-cylinder family car engine by 21% to 61%, and achieves the purpose of the invention.

Description

technical field [0001] The invention relates to a method for improving the idling vibration isolation performance of the front mount of a family car engine. In particular, it involves the use of porous aluminum-perlite composite material as a new vibration isolation component, and the porous metal-nonmetal composite material is added to the front suspension of the car engine to reduce the vibration transmission during engine idling and reduce the secondary vibration source of infrasonic waves For the purpose of strength, it is a method to improve the vibration isolation effect of the front mount in the low frequency range of 10Hz to 50Hz. Background technique [0002] "Suspension system" is the abbreviation of "engine mounting system" (engine mounting system) in the automobile manufacturing industry. In this industry, the front suspension of the engine is more commonly referred to as "machine claw pad" (engine claw rubber gasket or engine claw suspension) ; It is the main o...

AI Technical Summary

Problems solved by technology

[0024] In summary: For the design and manufacture of engine mounts for family cars, due to artificial technical barriers such as information asymmetry or technical secrecy between the automotive industry and the shipbuilding industry, how to reduce car engine vibration through chassis or new technologies for mount design and manufacturing? Other parts of the car body are transmitted to the car to improve the comfort of the passengers during the idling period of the roads in the city due to "traffic jams" or "morning and evening rush hours". There is still a big gap from people's expectations; The comfort during idling of family cars at this price must be paid more attention to, because most people who use this type of car are under high work pressure and life pressure. Infrasound detection, becoming part of the biological "helper" of "road rage"

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