Haeng-Muk Cho's scientific contributions
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Publications (8)
The introduction of alternative fuels is beneficial to overcome the fuel shortage and reduce engine exhaust emissions. LPG and CNG are relatively clean fuel and considered as most promising alternative automotive fuels worldwide because of its emission reduction potential and lower fuel price compared to gasoline. Now a day?s adaptation of dual fue...
Gasoline engines have proven their utility in light, medium and heavy duty vehicles. Concern about long term availability of petroleum and the environment norms by the increased vehicular emission have mandated the search for safe fuel. CNG is an environmentally clean alternative to the existing spark ignition engines with the advantages of minimum...
Bi-fuel system in a spark ignition engine (SIE) is a rising phenomena in today`s automobile technology. In a gasoline driven vehicle, alternatively adoption of compressed natural gas (CNG) could be used as a potential substitute to meet the energy requirement and this is possible by some minor changes in the hardware of the existing engine. Gasolin...
Natural gas is a promising alternative fuel of internal combustion engines. In this paper, the combustion and emission characteristics were investigated on a natural gas engine at two different fuel injection timings during the intake stroke. The results show that fuel injection timing affects combustion processes. The optimum spark timing (MBT) ac...
Engine bench tests has been done on a common-rail diesel engine with bio-diesel fuel to study effects of B100 and B20 on output power, fuel consumption and emissions. Test results show that B100 and B20 could reduce PM, HC, CO emission and smoke, but power decrease, fuel consumption increase and NOx increase obviously, B100 reduce PM and DS with 50...
Gasoline engine have proved its utility in light, medium and heavy duty vehicle in every sector of the world community. The concern about long term availability of petroleum and the increasing threat for the environment by the increasing load of vehicular emission, compel the technology to upgrade itself for meeting the challenges. CNG is environme...
The adoption of compressed natural gas (CNG) as a vehicle fuel is a common phenomenon as it is accelerating worldwide. Increasing number of CNG driven vehicles around the world has jumped up from one million in 1996 to five million in 2006. CNG as a vehicle fuel is very popular to the end users because of its clean-burning properties and cost effec...
For a sequential port fuel injection natural gas engine, its combustion and emission characteristics at low loads are crucial to meet light duty vehicle emission regulations. Fuel injection timing is an important parameter related to the mixture formation in the cylinder. Its effect on the combustion and emission characteristics of a natural gas en...
Citations
... CNG is extremely vaporizable and can be quickly mixed with other work gases to form a homogeneous combustible mixture, resulting in a better combustion process and improved emission and thermal efficiency. Therefore, engines using CNG as fuel can have better power, economy and emission performance [19]. Verma et al. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/272264872591367-1441924412659_Q64/Bhupendra-Singh-Chauhan.jpg)
... In comparison to gasoline and diesel, CNG has a reduced CO2 emissions [32] by 23% -35%, almost zero particulate matter (PM) emissions, 87% -90% reduction in NOx emissions, and 67% -76% reduction in HC emissions [33]. This is also close to Haeng & Mahmud [34] values, which stated that there is a significant reduction in the emission of CO by 70%, non-methane organic gas by 87%, NOx by 87% and CO2 by 20%. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/705638296457217-1545248688266_Q64/Md-Mahmud-3.jpg)
... Use of natural gas is better for reducing carbon dioxide production in comparison to other fossil fuels, but use of renewable fuels instead of natural gas would be still better. It can be made from coal or wood with more difficulty and lower efficiency than from natural gas [14,15]. ...
... Reference [7] studied Liquefied Petroleum Gas in the vehicles to familiarise legislators with existing practice as LPG is clean and has a low cost of ownership than petrol and diesel. Reference [8] experimented on CNG as a clean fuel in Korea for automobiles applications. This work concluded that, due to changes in the environmental norms and increased pollution, some alternative sources of fuels are required for the existing spark-ignition engines. ...
... Due to the large variation in NG compositions found around the world [5][6][7], it is important to ensure that these NG mixtures can be used interchangeably as fuels in current combustion applications. Moreover, understanding their limitations in terms of pollutants from conventional and non-conventional sources [8][9][10] is also important. Furthermore, understanding the reactivity of NG compositions for a composition envelope that is as wide as possible is also important for the development of new combustion devices to ensure that fuel flexibility can be included in the early stage of their design. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/360735038296064-1463017343215_Q64/Bq-He.jpg)
