Neste Oy, Kemira Oy, Helsinki City Transport and Technical Research Centre of Finland took part into the project during the years 1992-1993. Project was financed by Neste, Kemira and 'SIHTI', Research Programme on Energy and Environmental Technology of the Ministry of Trade and Industry. The effect of fuel composition and exhaust gas aftertreatment on the emissions was measured from truck and bus engines. Possibilities to measure unregulated emissions (aldehydes, polyaromatic hydrocarbons, mutagenicity) were built. A reformulated diesel fuel 'Citydiesel' was developed in the project. Citydiesel was able to reduce emissions compare to standard diesel fuel as follows: particulates by 10 to 30 %, nitrogen oxides by 2 to 10 %, sulphur dioxide by 97 %, polyaromatic hydrocarbons (PAH) over 50 %, mutagenicity of the exhaust particulates clearly, odour of the exhaust, smoke after a cold start. The use of Citydiesel fuel reduces emissions of the existing vehicles immediately which is a remarkable benefit. The very low sulphur content (below 50 ppm) makes it possible to use oxidation catalytic converters to reduce emissions of diesel vehicles. The new Euro 2 -exhaust regulations coming into force during 1996 can be met with a modern diesel engine, Citydiesel fuel and exhaust gas aftertreatment. Properties of Citydiesel fuel were verified in a 3 years field test with 140 city buses. Experience was good. E.g. engine oil change interval could be lengthened. Total value of the exhaust was estimated with different fuels and aftertreatment device in order to find out cheap ways to reduce emissions
Dieselkaeyttoeisten kaupunkilinja-autojen paeaestoejen vaehentaeminen. Loppuraportti. (Reducing exhaust gas emissions from citydiesel busses. Final report)
1994
20 pages
Report
Keine Angabe
Englisch
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