Dynamics of New Electromagnetic Valve in Camless Engines

Ly Vinh Dat; Yao Jung Shiao; Ku Hsiao Tsou

doi:10.4028/www.scientific.net/AMM.284-287.2044

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 284-287Dynamics of New Electromagnetic Valve in Camless...

Dynamics of New Electromagnetic Valve in Camless Engines

Abstract:

Conventional electromagnetic valvetrain (EMV) usually uses double E-coils to control valve timings for engines. This kind of EMV needs large energy to reset valve at engine start state and requires energy to hold valve at opening or closing position. Therefore, it consumes large amount of energy. In this study, an EMV system that uses hybrid permanent magnet and electromagnetic coil together is proposed. The use of EMV in SI engines allows valve timings to be variably controlled without camshaft. Dynamic models for the new EMV have been built to simulate and analyze valve dynamics in this study. Effects of gas flow resistance on valve surface and the damping coefficient are also discussed. Besides, actuation strategy for valve releasing is investigated. The results show that the new EMV satisfies requirements about lifting time, actuation energy, valve velocity and acceleration in SI engines.

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Periodical:

Applied Mechanics and Materials (Volumes 284-287)

Pages:

2044-2048

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.284-287.2044

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Online since:

January 2013

Authors:

Ly Vinh Dat, Yao Jung Shiao, Ku Hsiao Tsou

Keywords:

Camless Engine, Electromagnetic Valve Train (EMV), Valve Dynamics, Variable Valve Timing

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