In order to determine the main factors causing the mileage-related increase in formaldehyde emission from methanol-fueled vehicles, mileage was accumulated on three types of vehicle, each of which had a different air-fuel calibration system. From exhaust emission data obtained during and after the mileage accumulation, it was found that lean burn operation resulted in by far the highest formaldehyde emission increase. An investigation into the reason for the rise in engine-out formaldehyde emission revealed that deposits in the combustion chamber emanating from the lubricating oil promotes formaldehyde formation. Furthermore it was learnt that an increase in engine-out NOx emissions promotes partial oxidation of unburned methanol in the catalyst, leading to a significant increase in catalyst-out formaldehyde emission.
Study of Mileage-Related Formaldehyde Emission from Methanol Fueled Vehicles
Sae Technical Papers
International Congress & Exposition ; 1990
1990-02-01
Aufsatz (Konferenz)
Englisch
Study of mileage-related formaldehyde emission from methanol fueled vehicles
Tema Archiv | 1990
|Study of mileage-related formaldehyde emission from methanol fueled vehicles
Kraftfahrwesen | 1990
|Formaldehyde Emission Control Technology for Methanol-Fueled Vehicles
SAE Technical Papers | 1990
|Formaldehyde emission control technology for methanol-fueled vehicles
Kraftfahrwesen | 1990
|Formaldehyde Emission Control Technology for Methanol-Fueled Vehicles: Catalyst Selection
SAE Technical Papers | 1992
|