Application Natural Gas on City Buses and Their Introduction in the Traffic

Abstract

Compressed Natural Gas (CNG) as an alternative fuel has many advantages: lower cost, more complete combustion, lower emissions, lower noise and longer engine life. CNG technology has been developed for decades and now is available for commercial use in motor vehicles. Natural gas causing about 25% lower CO2 emissions compared to the same amount of energy diesel fuel, due to the lower carbon content (H/C = 4), and thus contributes significantly to reducing global warming. This enables bus body builders to make natural gas buses comply with the challenging and voluntary Enhanced Environment friendly Vehicle (EEV) emission standard, without using extensive filter technology and expensive additives. This paper analyzes the technical features of a city bus powered with compressed natural gas, as well as environmental, economic and security aspects of these buses for passenger transport in major cities. In the paper, also is presented the solutions for the reconstruction of diesel-powered local bus into dedicated natural gas vehicle.