F2010A133
Analysis of the Exhaust Emissions and Performance of the Modern Vehicle Fuelled with Petrol and CNG Alternatively
The European Commission has accepted the target of 20% replacement of conventional fuels by alternative fuels (biofuels, CNG, hydrogen) in the road transportation sector by 2020. Natural gas is widely used in the refining industry of liquid transportation fuels. It is seen as a bridge to a future hydrogen society. Natural gas vehicle population is growing and it reached in 2007 number of about 6,5 million. The average growth since 2000 was 30%.
Technology for light-duty CNG vehicles is well established, and the CNG vehicles have comparable performance referring to their petrol equivalents. CNG is commonly used in spark ignition engines because their powertrains are relatively easy to convert from liquid to gaseous fuels.
The analysis of CO, HC, NOx and CO2 emissions during emission test on chassis dynamometer as well as performance of a vehicle fuelled with petrol or CNG alternatively have been presented. Analyses have been made for vehicle with SI engine equipped with MPI feeding system operating in closed-loop control and typical three-way-catalyst, and heated oxygen sensor. The vehicle has been adapted by manufacturer for fuelling with CNG by using additional special equipment mounted to existing petrol fuelling system. Multipoint gas injection system (IV generation) has been used in testing vehicle. The tests subject to analyses presented above have been performed in the Engine Research Department of the BOSMAL Automotive Research and Development Centre in Bielsko-Biala, Poland within a research program investigating the influence of alternative fuels on exhaust emissions from automotive vehicles with spark-ignition and compression-ignition engines
This abstract is supplemented by a PDF, which can be viewed here.
Poster presentation: Environmentally friendly vehicles