The Effects of Different Methanol Ratios on the Integrated Fuel Economy of a Heavy Duty Diesel Engine
To explore the potential of combinational combustion of diesel and methanol for the improvement of integrated fuel economy, experiments were carried out on a certain high pressure common rail heavy duty diesel engine on different modes (A B and C speed with the load ratio of 100% 75% and 50% was included) based on the specially designed methanol supply project, which injects methanol into the engine intake manifolds. Firstly, the brake thermal efficiency (BTE), which is calculated based on diesel saving and methanol burning on the premise of the same BMEP, is utilized as information to evaluate the economy of the tested engine. Secondly, the shortages for BTE to indicate the economy of MDCC engines are set forth. And then, fuels total cost is proposed to evaluate the economy of MDCC engines. The optimal replacement ratio of diesel (RRD) for the lowest fuel cost is formulized by structuring an objective function. In addition, the major factors hindering the economy promotion are discussed and the effective measure to relax the constraints when they evolve into limiting factors of better economy for the MDCC engine. Finally, some valuable conclusions are arrived at the end of this paper. The research presents important references for the determination of optimal methanol ratio for MDCC engines.
Liu Bingshan Li Haiyan Li Zhiming Zou Ke Yin Yong Yao Chunde Yang Songlin
Wuhan University of Technology,China Dongfeng Motor Company,China Tianjin University,China
国际会议
上海
英文
1-6
2013-05-13（万方平台首次上网日期，不代表论文的发表时间）