A research on the influence of internal EGR on the combustion and emission performances of a diesel engine

作者：Lu Xiaorui^*; Gao Wenzhi; Gao Bo; Wang Shuang; Zhang Jing

来源：Qiche Gongcheng/automotive Engineering, 2014, 36(9): 1029-1033 and 1067.

• 3-D numerical simulation
• Combustion and emission performance
• Combustion pollutant
• Emission reduction
• Heat Release Rate (HRR)
• Induction process
• Internal EGR
• Turbulent kinetic energy

A scheme is put forward of adopting twin exhaust cams to realize internal EGR, and AVL FIRE software is used to conduct a 3D numerical simulation on the working process of a diesel engine to study the law of the effects of internal EGR on the in-cylinder flow field, the distributions of turbulent kinetic energy and O2 concentration, heat release rate and combustion pollutants in the induction process of engine. A comparative emission test is also performed on eight working conditions with and without internal EGR to verify the NOx emission reduction effects of twin exhaust cams, providing references for improving the combustion and emission performances of diesel engine with low cost.

• 出版日期2014
• 单位天津大学