Hydrogen homogeneous charge compression ignition (HCCI) engine with DME as an ignition promoter

摘要

Hydrogen combustion with dimethyl-ether (DME) was investigated in a single cylinder engine with a homogeneous charge compression ignition strategy. The hydrogen and DME injection quantities were varied respectively with a fixed sum of the total heat release value of the fuels. The injection timing of the DME was varied from -35 crank angle degrees to the top dead centre. The combustion temperature was lowered, and the emissions of carbon monoxide and hydrocarbon were increased as the DME injection timing was advanced. When the DME was injected near the top dead centre, carbon monoxide and hydrocarbon emissions were decreased while the nitric oxides emission was increased.