1. Combustion features under different center of heat release of a diesel engine using dimethyl carbonate/diesel blend
- Author
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Roland Baar, Xiaodong Zhao, Deqing Mei, Shan Yue, and Klaus Hielscher
- Subjects
Thermal efficiency ,Renewable Energy, Sustainability and the Environment ,020209 energy ,02 engineering and technology ,Compression (physics) ,Combustion ,Diesel engine ,Automotive engineering ,law.invention ,Cylinder (engine) ,Ignition system ,chemistry.chemical_compound ,Diesel fuel ,chemistry ,Chemical engineering ,law ,0202 electrical engineering, electronic engineering, information engineering ,Dimethyl carbonate - Abstract
Experiments were performed in a single cylinder common-rail diesel engine that adopts a low temperature premixed charge compression ignition (PCCI) mode. Combustion features of dimethyl carbonate (DMC)-diesel blends under various centers of heat release (COHRs) were revealed in details. With retarding of COHR, all the peaks of pressure and pressure rise rate and bulk gas temperature are postponed and declined in sequence. Normally, the crank angle of peak pressure is quite close to the COHR, while the peak of bulk gas temperature appears about 7°CA after COHR as a rule. The prolongation can be demonstrated at every stage of combustion such as q10 and q90 with the COHR being put backward. In addition, the heat release of diesel is completely slower than that of D10 fuel at various stages. Unfortunately, retarding of COHR implies a declining thermal efficiency of engines as well as a higher cyclic variation in general. Nevertheless, D10 blend has higher thermal efficiency than diesel thanks to high ...
- Published
- 2016
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