A comparison of exhaust emissions from vehicles fuelled with petrol, LPG and CNG

• Published in: IOP conference series. Materials Science and Engineering Vol. 148; no. 1; pp. 12060 - 12069
• Main Authors: Bielaczyc, P, Szczotka, A, Woodburn, J
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.09.2016
• Subjects: Alternative fuels; Automobiles; Automotive engines; Emission analysis; Exhaust emission; Exhaust gases; Gas injection; Gaseous fuels; Gasoline; Impact analysis; Light duty vehicles; Liquefied petroleum gas; LPG; Oxygen probes; R&D; Research & development; Spark ignition; Vehicle emissions; Vehicles
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/148/1/012060

This paper presents an analysis of THC, NMHC, CO, NOx and CO2 emissions during testing of two bi-fuel vehicles, fuelled with petrol and gaseous fuels, on a chassis dynamometer in the context of the Euro 6 emissions requirements. The analyses were performed on one Euro 5 bi-fuel vehicle (petrol LPG) and one Euro 5 bi-fuel vehicle (petrol CNG), both with SI engines equipped with MPI feeding systems operating in closed-loop control, typical three-way-catalysts and heated oxygen sensors. The vehicles had been adapted by their manufacturers for fuelling with LPG or CNG by using additional special equipment mounted onto the existing petrol fuelling system. The vehicles tested featured multipoint gas injection systems. The aim of this paper was an analysis of the impact of the gaseous fuels on the exhaust emission in comparison to the emission of the vehicles fuelled with petrol. The tests subject to the analyses presented here were performed in the Engine Research Department of BOSMAL Automotive Research and Development Institute Ltd in Bielsko-Biala, Poland, within a research programme investigating the influence of alternative fuels on exhaust emissions from light duty vehicle vehicles with spark-ignition and compression-ignition engines.