Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 09, 2018 - September 12, 2018
In order to improve the thermal efficiency of spark ignition (SI) engine, it is necessary to develop an ultra-lean burn technology in combination with EGR (exhaust gas recirculation). Addition of hydrogen to gasoline fueled engine is effective for extending the lean limit. In this study, the effect of addition of hydrogen on the engine performance of a gasoline fueled lean burn SI engine with EGR was investigated using a single cylinder research engine. As a result of heat balance analysis, the cooling loss and the exhaust loss decrease with expanding the lean limit by adding hydrogen, while the combustion efficiency decreases due to the increase in unburned fuel loss. The thermal efficiency can be improved by hydrogen addition on the basis of the balance of the losses.
