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http://dx.doi.org/10.7467/KSAE.2014.22.4.055

A Study on Combustion and Emission Characteristics of Diesel-DME Blended Fuels Using Pilot Injection in DICI Engine  

Jeong, Jaehoon (Graduate of Mechanical Engineering, Ulsan University)
Lim, Ocktaeck (School of Mechanical Engineering, Ulsan University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.22, no.4, 2014 , pp. 55-64 More about this Journal
Abstract
This work was investigated on pilot injection strategy of blended fuels(Diesel-DME) for combustion and emissions in a single cylinder direct injection compression ignition engine. Diesel and DME were blended by the method of weight ratio. Weight ratios for diesel and DME were 95:05 and 90:10 respectively. dSOI between main and pilot injection timing was varied. A total amount of injected fuels(single injection) was adjusted to obtain the fixed BMEP as 4.2 bar in order to compare with the fuel conditions. Also, the amount of pilot injection fuel was varied by 5%, 10% and 20% of total injection fuel. The engine was equipped with common rail and injection pressure is 700 bar at 1200 rpm. As a result, when mixing ratio increase, indicated thermal efficiency was increased in comparison with DD 100 and CO, THC and smoke were lower than DD 100. The influence of reducing NOx by pilot injection was more effective than DD 100. When pilot injection quantity increase, abrupt increase of NOx was occured at pilot injection quantity of 20%.
Keywords
Diesel; DME; Mixing ratio; Pilot injection; Pilot injection timing; Pilot injection quantity; Compression ignition engine;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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