Unburned Hydrocarbon Emissions from Stratified Charge Direct Injection Engines

2003 ◽  
Author(s):  
James Hilditch ◽  
Zhiyu Han ◽  
Top Chea
Keyword(s):  
Direct Injection ◽  
Hydrocarbon Emissions ◽  
Direct Injection Engines ◽  
Stratified Charge ◽  
Unburned Hydrocarbon

Study on Mixture Formation of Liquid LPG for a Center Injection DISI Engine

2011 ◽  
Vol 201-203 ◽  
pp. 622-626 ◽  
Author(s):  
Bo Yan Xu ◽  
De Zhi Sun ◽  
Yun Liang Qi ◽  
Yong Wei Zheng ◽  
Hai Ying Tian ◽  
...  
Keyword(s):  
Direct Injection ◽  
Spark Ignition Engines ◽  
Liquefied Petroleum Gas ◽  
Mixture Formation ◽  
Stratified Charge ◽  
Unburned Hydrocarbon ◽  
Hydrocarbon Emission ◽  
Wall Wetting ◽  
Direct Injection Spark Ignition ◽  
Early Injection

Center injection in pentroof combustion chamber can reduce wall wetting and unburned hydrocarbon emission in wall guided combustion system, which is generally employed in DISI (Direct Injection Spark Ignition) engines. Once liquid phase LPG (Liquefied Petroleum Gas) is injected at a high pressure, flash boiling occurs severely, promotes mixing and reduces wall wetting in wall guided engine. Based on validating the feasibility of the models, this paper numerically simulates the mixing process of a center injection wall guided DISI engine in different conditions. The results show that a stratified charge can obtained at part load with late injection, whereas at high load the early injection can achieve a homogeneous mixture at the end of compression stroke.

Sign in / Sign up

Export Citation Format

Share Document