Teknisk slutrapport
Abstract
Beyond Euro5 legal requirements will be introduced for gasoline vehicles. Particulate mass will be introduced from Euro5b and particulate number Euro6. This work has been performed mainly on spark ignited gasoline engines to understand the particulate emissions and characterize particulate matter in tailpipe and along the exhaust line in terms of particle number and size distribution. The work includes three areas of work; benchmark of emissions from Euro4 vehicles with different combustion concepts, the nature of particulate emissions as they travel in exhaust pipes for some selected vehicles and a concept to reduce tail pipe emissions for a spark ignition direct injected gasoline engine.
Benchmark studies confirm that there will be a problem to meet proposed Euro6 levels with the direct injected vehicles that are on the market today. The three way catalytic converter that is common today will reduce particulates for port injected vehicles and for smaller particulates from direct injected vehicles, but accumulation mode particles need some other technique to be reduced in number. Adding a filter in the aftertreatment system is one way to go as it reduces the particulate number with about 99% for the tested DI engine.
Kontaktperson: Per Ericsson
Utgivare: GM Powertrain Sweden, 461 80 Trollhättan, Sweden
Författare: Per Ericsson
Språk: Engelska
Sidor: 7
