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Mathematical Problems in Engineering
Volume 2014, Article ID 498624, 8 pages
http://dx.doi.org/10.1155/2014/498624
Research Article

Oil Coking Prevention Using Electric Water Pump for Turbo-Charge Spark-Ignition Engines

1Graduate Institute of Mechanical and Electrical Engineering, National Taipei University of Technology, Taipei 10626, Taiwan
2Metal Industries Research & Development Centre, Taipei 10626, Taiwan

Received 28 May 2014; Accepted 11 August 2014; Published 27 August 2014

Academic Editor: Teen-Hang Meen

Copyright © 2014 Han-Ching Lin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Turbocharger has been widely implemented for internal combustion engine to increase an engine's power output and reduce fuel consumption. However, its operating temperature would rise to 340°C when engine stalls. This higher temperature may results in bearing wear, run-out, and stick, due to oil coking and insufficient lubrication. In order to overcome these problems, this paper employs Electric Water Pump (EWP) to supply cool liquid to turbocharger actively when the engine stalls. The system layout, operating timing, and duration of EWP are investigated for obtaining optimal performance. The primarily experimental results show that the proposed layout and control strategy have a lower temperature of 100°C than the conventional temperature 225°C.