Motor vehicle exhaust system

摘要

A motor vehicle driven by an internal combustion engine has an exhaust system, the discharge section of which extends transversely to the direction of motion of the vehicle and comprises a plurality of discharge regions distributed along its length. When the vehicle is driven at urban speeds, the aerodynamic flow in the vicinity of the discharge regions is such that the exhaust gases from the engine are uniformly diluted in less than 100 ms in the air slipstream of the moving vehicle to fall below the saturation limit above which nano-particles may form by nucleation.