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Synthesis of studies on polarized valve actuators for internal combustion engine

J. P. YONNET1,* , C. CHILLET2, C. FAGEON1

Affiliation

  1. PSA Peugeot Citroën, 18 rue des Fauvelles, 92250 La Garenne Colombes, France
  2. Laboratoire d’Electrotechnique de Grenoble (UMR 5529 CNRS / INPG-UJF) BP 46, 38402 St Martin d’Hères Cedex, France

Abstract

A very promising technique to reduce fuel consumption in spark-ignition engine is to control the load by means of variable valve timing with electromagnetic valve train systems. So far, such concepts use actuators based on electro-magnets systems only. The best configurations are polarized actuators, in which magnetic flux of permanent magnets is in series or in parallel with the main flux circulation. Compared with non polarized actuators, the addition of permanent magnets in the magnetic circuit allows important operation improvements. The motion can be controlled more easily, allowing us to achieve a better soft-landing and to reduce the energy consumption. In addition, when the valve is not moving (either closed or open), it can remain in its position by the magnetic attraction, without any energy. Polarized actuators with permanent magnets are the best solution for electromagnetic valves..

Keywords

Linear actuators, valve, Permanent magnet polarisation.

Submitted at: Jan. 25, 2007
Accepted at: April 15, 2007

Citation

J. P. YONNET, C. CHILLET, C. FAGEON, Synthesis of studies on polarized valve actuators for internal combustion engine, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 4, pp. 1180-1186 (2007)