WSEAS Transactions on Applied and Theoretical Mechanics
Print ISSN: 1991-8747, E-ISSN: 2224-3429
Volume 10, 2015
Power Consumption of Electromagnetic Valvetrain System
Authors: ,
Abstract: The electromagnetic valvetrain (EMVT) has been widely investigated and considered to have great capability to improve the fuel economy, the emissions, and the torque output performance of the engine. While the mechanical camshaft driven valvetrain consumes mechanical energy to drive the valves, the EMVT consumes electrical energy. If the power consumption is not properly controlled, the improvement of engine fuel economy brought by camless valvetrain will be weakened. This paper focus on the power consumption of EMVT. The detailed power losses derivation of the EMVT was discussed and compared with conventional valvetrain. The power consumption and pumping losses at various valve operating modes are shown and compared, including various engine speed, variable transition time, variable valve lift, and valve deactivation. The result shows that the power consumption is almost proportional to the engine speed. At low engine speeds and low engine loads, the power consumption can be reduced by applying long transition time and small valve lift. The power consumption can also be reduced by deactivating half of the intake valves at low engine loads.
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Pages: 174-179
WSEAS Transactions on Applied and Theoretical Mechanics, ISSN / E-ISSN: 1991-8747 / 2224-3429, Volume 10, 2015, Art. #18