Performance Evaluation of Homogeneous Charge Compression Ignition Combustion Engine – A Review

Abstract

A reduced compression ratio and delayed inlet valve closure contribute to better mixing of the fuel and improve HCCI combustion.  The inlet temperature and inlet pressure play a prominent role in HCCI combustion and emissions.  Introduction of EGR and its proportion are very important in achieving proper combustion and obtaining better emission results.

Airflow Characteristics Investigation of a Diesel Engine for Different Helical Port Openings and Engine Speeds

“…Diesel engines are the most used engines in commercial land-based vehicles due to their higher thermal efficiency in comparison with gasoline engines [1]. Over recent years, the increased energy demand due to the rise in the global population [2], overreliance on fossil fuels [3], and the need to decrease emissions [4][5][6] have led to more stringent regulations on the design of engines. Several methods have been devised to improve the emissions of diesel engines, including the use of biofuel [7,8], manipulating the air mass intake and temperature [9] as well as generating swirl and tumble motion in the airflow.…”