Abstract
The homogeneous charge compression ignition (HCCI) combustion has attracted much interest because it can simultaneously achieve high efficiency and low emissions. However, it is difficult to control the ignition timing with this type of combustion. The HCCI combustion process also has the problem that combustion proceeds too rapidly under high load operation. Supercharging the intake air is one of the effective methods for increase the operating load of HCCI combustion. In our previous studies, the heat release rate of hot flame can be moderated by using supercharged HCCI combustion. In the present study, a blended fuel of dimethyl ether (DME) and methane, with each component having different ignition characteristics, a supercharged HCCI combustion were used to investigate the effects of the mixing fuel ratio and injected heat value on the heat release characteristics of the hot flame.
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