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Effect of Piston Geometry on Diesel Engine Performance and Emission Characteristics with Varying Injection Pressure

Author(s):

Nimesh A. Patel , Merchant institute of Techonology; Vinaykumar Sharma, Merchant institute of Techonology

Keywords:

DI, Piston Crown, Combustion Chamber, Fuel Consumption, Hemisphere Combustion

Abstract

Engine performance improvement and exhaust emissions reduction are the two most important issues to develop a more efficient engine with less environmental impact. For diesel engine piston geometry, injection timing and injection pressure are one of the major parameters that affect the engine performance and emissions. These issues can be sought out by geometry modification of piston and variation of pressure. In this study, engine performance improvement and exhaust emissions reduction was carried out with the help of some modification in piston bowl in a single cylinder Direct Injection (DI) diesel engine. The piston bowl geometry was modified to have piston-B (Hemisphere Combustion Chamber With Circular Arc on Periphery of Piston Crown @ 120°) from the standard piston-A(Hemispherical open type Combustion Chamber).The test result shows that Brake Specific Fuel Consumption was decrease by 5.98% and brake thermal efficiency was increase by 1.93% with piston B at 185 bar pressure when compare with the baseline of engine. Due to the expense of increase the exhaust gas temperature (EGT) and oxide of nitrogen (NOX) emission by 4.52% and 4.22% respectively. The exhaust gas emission of hydrocarbon (HC) was decrease by 2.12%and carbon monoxide (CO) was similar to the baseline condition.

Other Details

Paper ID: IJSRDV3I30510
Published in: Volume : 3, Issue : 3
Publication Date: 01/06/2015
Page(s): 1042-1047

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