Patent ID: 9677440
Date: 2017-06-13
CPC Classifications: F01N,Y02T

Claim:
1. An aftertreatment system comprising: a first canister having an upstream end and a downstream end; a second canister having an upstream end and a downstream end; an exhaust conduit extending from the downstream end of the first canister to the upstream end of the second canister; a nozzle positioned to inject reductant into the first canister; a hydrolysis catalyst disposed within the first canister adjacent to the downstream end of the first canister; a combined particulate filter and selective catalytic reduction catalyst disposed within the second canister downstream of the hydrolysis catalyst and the nozzle; and a selective catalytic reduction catalyst downstream of the hydrolysis catalyst and the nozzle, the selective catalytic reduction catalyst disposed within the second canister downstream of the combined particulate filter and selective catalytic reduction catalyst; wherein the hydrolysis catalyst is configured to condition the reductant upstream of the combined particulate filter and selective catalytic reduction catalyst and the selective catalytic reduction catalyst.