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The Influence of the Internal Exhaust Gas Recirculation (EGR) On the Pumping Losses The exhaust gas recirculation (EGR) is one of the most used methods to control the start of combustion in the 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 closing the exhaust valve before the top dead centre to trap a part of the burned gases into 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 centre.
The Influence of the Internal Exhaust Gas Recirculation (EGR) On the Pumping Losses.

BULLETIN OF THE TRANSILVANIA UNIVERSITY OF BRASOV - SERIES I - ENGINEERING SCIENCES

Volum 4 | Număr 1 | Publicat la 15/07/2011 | Pagini:  1 - 6 | ISSN  2065-2119 | eISSN  2065-2127

Autori:
Radu Cosgarea [1] | Corneliu Cofaru [1]
[1] Universitatea Transilvania din Brasov - Facultatea de Inginerie Mecanica Brasov, Romania
Rezumat
The exhaust gas recirculation (EGR) is one of the most used methods to control the start of combustion in the 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 closing the exhaust valve before the top dead centre to trap a part of the burned gases into 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 centre.
Cuvinte cheie:
homogeneous charge compression ignition engines, internal EGR, pumping losses, variable valve timing
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