The study of combustion characteristic compound combustion mode of DME and methanol

It is very easy to make DME combust by compressing it.When injecting DME into intake pipe,the methanol injected directly into cylinder can combust.The experiment investigates effects on combustion characteristic of the injection timing for methanol.The results show that,when methanol is injected late,combustion process is composed of DME low temperature combustion,high temperature and diffusion combustion of methanol.When methanol is injected on middle injection timing,combustion process comprises DME low temperature,high temperature,methanol diffusion combustion and premixed combustion.When methanol is injected early,combustion mode comprises mainly premixed combustion of methanol.