Recent Trends and Technologies in Diesel Engine Combustion: A Review
Combustion is utilized for many different applications viz. to drive Internal Combustion Engines, to cook foods, to heat space, to convert water into steam to run steam turbines etc. Hence it is very important to understand the combustion phenomenon and ways to improve combustion characteristics. There are many parameters which affect the diesel engine combustion characteristics, but few important parameters are viz. combustor geometry (to improve the mixture preparation characteristics), type of fuel (to generate required power and improve fuel economy), control of the spray of the diesel in the combustor for proper mixture preparation and maintaining its required concentration (because for diesel engines mixture is heterogeneous), pressure and temperature during combustion, emissions from the combustion process (because emissions norms have become very stringent nowadays), combustor material etc. Present paper’s main aim is to discuss the importance and degree of success achieved by the implementation of specific technology in diesel engine combustion characteristics. Different successful technologies implemented to improve diesel engine characteristics are viz. coating to combustion chambers to reduce emissions, use of homogeneous charge combustion ignition (HCCI) to prepare mixture properly, reactivity controlled compression ignition, low temperature combustion to reduce the NOx emissions, development of the fuel jet spray in the combustor, modification in the combustor geometry, use of transient low pressure wall-impinging gas jet for proper mixture formation etc. This paper discusses the recent trends and technologies with their advantages and disadvantages over normal diesel engine combustion characteristics.