Evaluation of NOx emissions of a retrofitted Euro 5 passenger car for the Horizon prize “Engine retrofit”
- European Commission – Joint Research Centre, via E. Fermi 2749, I-21027 Ispra, VA (Italy)
- European Commission – DG Research & Innovation, ORBN 07/139, B-1049 Brussels (Belgium)
Highlights: • Many studies report diesel vehicles emitting more than 4 times the type approval NO{sub x} in real driving conditions. • One solution is retrofitting them, but there is no legislative background for passenger cars. • The Horizon 2020 prize for the “Engine Retrofit for Clean Air” aims at reducing the pollution in cities. • A Euro 5 retrofitted vehicle showed significant reductions over test cycles, but small at the cold start phases. • In some high speed conditions NH{sub 3} and N{sub 2}O were measured. The Horizon 2020 prize for the “Engine Retrofit for Clean Air” aims at reducing the pollution in cities by spurring the development of retrofit technology for diesel engines. A Euro 5 passenger car was retrofitted with an under-floor SCR (Selective Catalytic Reduction) for NO{sub x} catalyst in combination with a solid ammonia based dosing system as the NO{sub x} reductant. The vehicle was tested both on the road and on the chassis dynamometer under various test cycles and ambient temperatures. The NO{sub x} emissions were reduced by 350–1100 mg/km (60–85%) in the laboratory depending on the test cycle and engine conditions (cold or hot start), except at type approval conditions. The reduction for cold start urban cycles was < 75 mg/km (< 15%). The on road and laboratory tests were inline. In some high speed conditions significant increase of ammonia (NH{sub 3}) and nitrous oxide (N{sub 2}O) were measured. No effect was seen on other pollutants (hydrocarbons, carbon monoxide and particles). The results of the present study show that retrofitting high emitting vehicles can significantly reduce vehicle NO{sub x} emissions and ultimately pollution in cities.
- OSTI ID:
- 23107948
- Journal Information:
- Environmental Research, Vol. 166; Other Information: Copyright (c) 2018 The Authors. Published by Elsevier Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0013-9351
- Country of Publication:
- United States
- Language:
- English
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