期刊名称：Majalah Iptek = IPTEK : The Journal for Technology and Science
印刷版ISSN：0853-4098
电子版ISSN：2088-2033
出版年度：2019
卷号：30
期号：2
页码：64-67
DOI：10.12962/j20882033.v30i2.4996
出版社：IPTEK
摘要：Sequential combustion process on diesel dual fuel engine with compressed natural gas (CNG) fuel was complex.
The problems of diesel dual fuel with CNG gas are reduced thermal efficiency and resulting in high carbon monoxide (CO)
and unburned hydrocarbon (HC) emissions. The right setting between combustion air, diesel pilot fuel, and CNG gas fuel
can improvement the performance and emissions. The experiment was conducted with diesel fuel conventional and dual fuel
mode with CNG fuel in a single cylinder, four strokes, constant speed (1500 rpm) diesel engine type diamond DI 800.
Performance parameters such as thermal efficiency and specific fuel consumption (SFC), emissions such as CO, HC, and
smoke density are determined at five starts of injection timing (SOI) CNG of 700CA, 900CA, 1100CA, 1300CA, dan 1500CA
ATDC with ECU programmable of Vemstune software. The results indicated that retarded CNG injection timings
improved engine performance and emissions diesel dual fuel. Start of CNG injection timing optimization at 1300CA ATDC
with increased thermal efficiency 14,35% and decreased specific fuel consumption (SFC) 8,83 % . in addition, it decreased
CO emissions 21,35%, HC emissions 17,93%, and PM emissions lower 34,98%. However, engine performance diesel dual
fuel lower than a conventional diesel engine.
关键词：Diesel dual fuel;the start of CNG injection timing;engine performance;emissions
