Abstract
Supercharging is an effective means of increasing the load of a homogeneous charge compression ignition (HCCI) engine, but its effect on combustion is still not clearly understood. This study examined the influence of the intake air pressure on the low- and high-temperature reactions of an HCCI engine operating on DME and methane. A chemical kinetics simulation was also conducted. The experimental results showed that combustion became more moderate as the intake air pressure was increased. Moreover, the mixing ratio of DME and methane changed the rapidity of combustion under high intake pressure operation.
