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- W2000465578 abstract "Abstract In this study, effects of DME (dimethyl ether) pre-mixing ratio and cooled external EGR (exhaust gas recirculation) rate on combustion, performance and emission characteristics of a DME-diesel dual fuel PCCI (premixed charge compression ignition) engine were investigated in a 2105 engine. PCCI combustion at a high pre-mixing ratio exhibited a three-stage-combustion behavior. The peak values of heat release rate and pressure rise rate increased in HCCI (homogeneous charge compression ignition) combustion stage and decreased in diesel diffusion combustion stage. A higher DME pre-mixing ratio caused lower smoke and NO x (nitrogen oxides) emissions but higher HC (hydrocarbons) and CO (carbon monoxide) emissions. Adopting EGR, the peak values of in-cylinder pressure and calculated mean charge temperature decreased. Meanwhile, the crank-angle positions corresponding to the maximum heat release rate and maximum pressure rise rate lagged respectively. Equivalent brake specific fuel consumption increased. With an increase in EGR rate, NO x emission decreased sharply, however, smoke, HC and CO emissions increased. Nevertheless, decreasing levels in maximum values of in-cylinder pressure and temperature, heat release rate and pressure rise rate, as well as lagging degrees in crank-angle positions corresponding to the above-mentioned maximum values, gradually weakened with an increase in DME pre-mixing ratio." @default.
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- W2000465578 date "2014-08-01" @default.
- W2000465578 modified "2023-10-17" @default.
- W2000465578 title "Combustion and emission characteristics of a DME (dimethyl ether)-diesel dual fuel premixed charge compression ignition engine with EGR (exhaust gas recirculation)" @default.
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- W2000465578 doi "https://doi.org/10.1016/j.energy.2014.05.086" @default.
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