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Comparison of performance of compact chamber spark‐ignition engine with conventional S.I. engine
Author(s) -
Najjar Yousef S. H.,
AlHaddad Muhannad R.
Publication year - 2011
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.1716
Subject(s) - automotive engineering , mean effective pressure , ignition system , integrated engine pressure ratio , piston (optics) , cylinder head , homogeneous charge compression ignition , internal combustion engine , petrol engine , compression ratio , ignition timing , diesel cycle , mechanical engineering , spark (programming language) , fuel efficiency , spark ignition engine , naturally aspirated engine , cylinder , engine coolant temperature sensor , engineering , exhaust gas recirculation , combustion chamber , combustion , computer science , physics , aerospace engineering , chemistry , optics , organic chemistry , wavefront , programming language
This paper deals with the compact chamber engine in which a bowl‐like space in the piston or head of the cylinder is added to cause swirling of the air–fuel mixture. This causes a change in performance from the conventional spark ignition engine. In this work, the operating variables considered are the engine speed, equivalence ratio, inlet pressure and temperature and exhaust pressure. A computer program is specially devised to calculate performance at design and off design operation conditions. The compact chamber achieves an increase in volumetric efficiency of 5%. The brake efficiency is 28.5%, whereas for conventional SI engine is 23%, with an increase of 20%. The brake power for the compact chamber engine is 39 kW, whereas for the conventional engine is 35 kW, an increase of 10%. Hence, the reduction in the brake‐specific fuel consumption is about 20%. Copyright © 2010 John Wiley & Sons, Ltd.