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http://dx.doi.org/10.7467/KSAE.2015.23.4.410

Experimental Study on Natural Gas Conversion Vehicle(1) - Fuel Economy, Emission and Roadability  

Kim, Hyung-Gu (Graduate School of NID Fusion Technology, Seoul National University of Science and Technology)
Kim, Inok (Graduate School of Energy & Environment, Seoul National University of Science and Technology)
Ohm, Inyong (Department of Mechanical & Automotive Engineering, Seoul National University of Science & Technology)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.23, no.4, 2015 , pp. 410-419 More about this Journal
Abstract
In this study, the roadability, fuel economy and emission characteristics were evaluated for a natural gas converted vehicle. The results are as follows; Not only the shortage of power was observed in stall test, but also large deterioration of acceleration performance was exposed in roadability. Compared to the original LPG system, the acceleration is 76% in start acceleration and 45 ~ 65% in overtaking acceleration, especially the decline became larger when air conditioner is at work. Furthermore, because the mapping data, which controls the injection depending on driving condition, do not match up with injection system, the failure of air-fuel ratio feedback control occurs resulting from the large gap between the required and the really supplied amount of fuel. This failure cause the exhaust gas to emit without catalytic conversion and the fuel economy based on the fuel heat value to get worse 22% in the mode test and 16% in road test respectively. In addition, the existing injection system does not secure enough fuel at the starting so that it may lead to the fail of clod start, the deterioration of hot start and inharmonic of engine at the idle after start.
Keywords
NG; Fuel economy; Emission; Roadability;
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Times Cited By KSCI : 1  (Citation Analysis)
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