Malfunctioning emission controls continue to be a major source of emissions from in-use vehicles. We analyze two sources of data on cars with malfunctioning emissions controls: remote sensing surveys and dynamometer tests of cars in the condition they were received. Our analysis indicates that roughly 8 percent of relatively new (2- to 5-year old), modern technology (fuel-injected) cars have malfunctioning emission controls. There is a wide range in the probability of malfunction of specific models, from zero to over 20 percent. Possible causes of high model-specific malfunction probability are poor initial design and/or manufacture.
Emissions from Modern Passenger Cars with Malfunctioning Emissions Controls
Sae Technical Papers
International Congress & Exposition ; 1996
1996-02-01
Aufsatz (Konferenz)
Englisch
Emissions from modern passenger cars with malfunctioning emissions controls
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