Effects of Vehicle Usage on Aldehyde Emissions in Flex-Fuel PFI Engines Using Ethanol

Brazil PL8 regulation has required that manufacturers comply with new emissions levels for all of vehicle life – 0 km up to 160.000 km.

On this study, tests found that results between new and used vehicles are remarkably similar except for Aldehydes on Ethanol tests. To better understand this phenomena, two main ideas were considered: first, the engine mileage needed to stabilize aldehydes emissions; and second, the main factors responsible for higher acetaldehyde values on new engines only.