IMPACT OF COMBUSTION CHAMBER SIZE OF EMISSIONS IN SPARK IGNITION ENGINE: A REVIEW

Abstract

One of the most critical aspects of the internal combustion engines (ICE) which can affect the performance and emissions is the combustion chamber design. Given comparable chamber size changes, the combustion rate and natural mixing (i.e., fuel-air mixing) change significantly (nearly a half of the energy of the fuel supplied to the engine goes to the combustion chamber), flame speed, and thermal efficiency (roughly half of the energy of the fuel liberated at the combustion zone). The emissions criteria based on chamber sizes on carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and carbon dioxide (CO₂) will be discussed in this review article. The combustion efficiency shows significant improvement with decreasing chamber volume, but CO and HC emissions reduced but simultaneously, due to increased peak temperatures NOx tends to increase from experimental and theoretical studies [3]. Smaller chamber size decreases NOx but also increases CO and HC emissions because of incomplete combustion. Abstract:It is a concise literate review, trade-offs between emissions and technology interventions to balance the performance with emissions.