Effect of direct injection dimethyl ether on the micro-flame ignited (MFI) hybrid combustion and emission characteristics of a 4-stroke gasoline engine

The low temperature combustion is required for an internal combustion gasoline engine to achieve higher thermal efficiency and lower NOx emissions. The gasoline controlled auto-ignition (CAI) has been extensively researched to achieve low temperature combustion but its lack of control in combustion process has limited its applications. To overcome this problem, dimethyl ether (DME) is directly injected into the cylinder to generate multiple...