Patent ID: 7617678

Claim:
A method comprising: providing a system comprising a valve assembly for use with an assembly for a combustion engine, said valve assembly comprising a housing, said housing having a plurality openings for the controlled flow of gas therethrough, a valve in said housing; and an actuator operably connected to said valve and constructed and arranged to move said valve with respect to said openings to control the flow of gas therethrough, the gas comprising combustion engine exhaust, and wherein said openings comprising a first opening comprising a first inlet or a first outlet, a second opening comprising a second inlet or a second outlet, and a third opening comprising a first outlet or a first inlet; causing said actuator to move said valve to a first position wherein said second opening is fully open and said first opening is partially closed, to a second position wherein both said first opening and said second opening are fully open, and to a third position wherein said first opening is fully open and said second opening is at least partially closed, and to a fourth position wherein both said first opening and said second opening are each at least partially closed.