Patent ID: 7497074

Claim:
A system comprising: an engine having a bank of cylinders; an emission control device in an upstream position coupled to at least a first and second cylinder on said bank, said emission control device having a first path for treating exhaust from said first cylinder, and a second path for treating exhaust from said second cylinder, said first and second paths being separated at least through a portion along a path of flow of said emission control device to prevent mixing before being at least partially treated by said device, said device having a frontal surface area with a wider region and a narrower region, said portion traversing the wider region; and a fuel vapor purge control valve coupled to one of said first and second cylinders, but not the other of said first and second cylinders; wherein said engine is V-type engine, and where the bank forms one side of the V; and wherein said engine further has a variable valve actuator coupled to said bank of cylinders, said device having a washcoat with a precious metal.