Measurement of Mixture Distribution using Laser Induced Breakdown Spectroscopy in Hydrogen Direct Injection Stratified Charge

摘要

Reduction of cooling loss due to the heat transfer from burning gas to the combustion chamber wall is very important for improving the thermal efficiency in hydrogen engines. The previous research has shown that the direct injection stratified charge can be a technique to reduce the cooling loss and improve thermal efficiency in hydrogen combustion. This research applied the laser induced breakdown spectroscopy to the hydrogen direct injection stratified charge. Measurement of instantaneous local equivalence ratio by the method cleared the characteristics of mixture formation of hydrogen direct injection stratified charge. This research also tried the active control of mixture distribution by split fuel injection.