Design for a Novel Electromagnetic Valve for Camless SI Engines

Abstract:

Some previous studies have demonstrated that variable valve timing can effectively enhance engine performance, as well as significantly reduce fuel consumption and emission for SI engines. Use of electromagnetic valve train (EMV) in an engine allows valve timings to be variably controlled at different operating conditions. By this way, an EMV engine is superior to an engine with conventional camshaft-based valve train in improving engine efficiency. In this paper, a novel EMV, which uses permanent and electromagnet together, has been proposed. Improvements in structure, actuating method and optimal parameters for this EMV have brought many advantages about low actuating power, easy actuation and fast response, etc. The results show that this EMV achieves 15% volume reduction and 20% holding force enhancement by special armature design. With the aids of permanent magnet and valve releasing strategies, this novel EMV only needs small EMV actuating power compared with conventional EMV.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 1811-1815
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.1811
• Online since: January 2013
• Authors: Ly Vinh Dat, Yao Jung Shiao, Chin Hau Huang
• Keywords: Camless Engine, Electromagnetic Valve Train (EMV), Engine Efficiency, Variable Valve Timing

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