The Influence of the Internal Exhaust Gas Recirculation (EGR) on the Pumping Losses

Authors

  • R. Cosgarea Transilvania University of Brasov, Romania
  • M. Aleonte Transilvania University of Brasov, Romania
  • C. Cofaru Transilvania University of Brasov, Romania

Keywords:

homogeneous charge compression ignition engines, internal EGR, pumping losses, variable valve timing

Abstract

Exhaust gas recirculation (EGR) is one of the most used methods to control the start of combustion in homogeneous charge compression ignition engines. To obtain the homogeneous combustion starting from a gasoline engine the internal EGR strategy has to be used to raise the temperature of the fresh charge. Internal EGR is achieved by closing the exhaust valve before the top dead center to trap a part of the burned gases in the cylinder. This paper presents the results of the simulations made to investigate the effects of the internal EGR on the pumping losses. The simulations were made for three operating where the exhaust valve is closed with different advances before the top dead center.

Author Biographies

R. Cosgarea, Transilvania University of Brasov, Romania

Centre “High-tech Products for Automotives”

M. Aleonte, Transilvania University of Brasov, Romania

Centre “High-tech Products for Automotives”

C. Cofaru, Transilvania University of Brasov, Romania

Centre “High-tech Products for Automotives”

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Published

2011-07-09

Issue

Section

MECHANICAL ENGINEERING