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Diesel Vehicles Emissions Control in Santiago, Chile: Itinerary and Technical Developments
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Abstract
Air quality in Santiago (4.500.000 habs) has deteriorated during the last decade. This situation is aggravated by the topographical and meteorological set up of Santiago. Around 55% of the trips are served by diesel buses, the rest through, cars, taxis, shared taxis, metro and foot. Buses in Santiago are constructed using truck chassis with school bus type body. Engines are water refrigerated, 4-6 cilinder direct injection diesels. Analysis of environmental data shows that 70% of PM-10 comes from diesel emissions. Emissions have been measured according Santiago's cycle. Measurement procedures EPA based. Emissions are 3 gr/km.
I&M procedures were researched to determine the motives for the high emissions. Results showed that this area is highly underdeveloped. A pilot program in which different fuels and technologies were used was implemented. Results of this experience is that the best C/E solution was well maintained diesel engines. Emissions of 0,34 gr/km was achieved. Other aspects analyized were: emission inspection through dynamometer and opacimeter. This system is being automatized. New emission standards were drafted. The standards establish a gradual increase in emission limitations. In the final step 1991 EPA diesel standard for urban buses are proposed.
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Katz, R. and Saez, A., "Diesel Vehicles Emissions Control in Santiago, Chile: Itinerary and Technical Developments," SAE Technical Paper 912423, 1991, https://doi.org/10.4271/912423.Also In
References
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- 1990
- Katz Ricardo A. The Automobile and the Environment Seminar The World Bank Washington D.C. February 28 1990 “Experience with control measures: Their origin, cost and justification. The case of Santiago, Chile.”
- Katz Ricardo A. Globe 90 Vancouver, B.C. March 21 1990 “Policy measures and technological requirements for sustainable urban growth in Chile.”
- Katz Ricardo Abril 1990 mo “USO DE COMBUSTIBLES ALTERNATIVOS EN LA LOCOMOCION COLECTIVA DE SANTIAGO. ALGUNOS RESULTADOS PRELIMINARES DE UN PROGRAMA PILOTO.”