FL1-2: Combustion Method of Diesel Engine Fueled with Hydrogen for High Efficiency(FL: Fuels and Lubricants,General Session Papers)

Abstract

In order to achieve hydrogen-fueled diesel engine. authors suggest the hydrogen combustion with ignition-assist method of Dimethyl ether(DME).The in-cylinder temperature is raised through a reaction in compression stroke by adding DME to intake gas. 1[he ignition-assist method of DME shorteried the auto-ignitiori delay of hydrogen, and obtained the stable auto-ignition of hydrogen. Ihe characteristics of hydrogen auto-ignition and combustion processes with this method were grasped in several conditions for suitable combustion methodology

The effects of hydrogen addition on engine power and emission in DME premixed charge compression ignition engine

“…As it can be seen in Fig. 7, the general trend suggests that the DME injection timing controls the hydrogen ignition [24]. Indicative-mean-effective-pressures (IMEPs) of each injection strategy were compared to investigate the effect of DME injection timing in Fig.…”

“…In particular, hydrogen peroxide has a significant effect on promoting the auto-ignition of hydrogen. The thermal decomposition reaction of hydrogen peroxide is the most important reaction for the production of hydroxide radicals which promotes hydrogen auto-ignition [24]. Due to these characteristics of DME combustion, DME is recommended as a fuel for the hydrogen-DME CI engine.…”