Patent ID: 9512760
Filing Date: 2016-12-06
CPC Classification: F01N,Y02T

Claim Text:
1. An aftertreatment system for an engine, comprising: an exhaust passage configured to receive an exhaust flow from the engine; an injector disposed in the exhaust passage and configured to inject a reductant into the exhaust flow; a bypass conduit fluidly connected to the exhaust passage downstream of the injector; at least one valve disposed in the bypass conduit and configured to divert exhaust gases from the exhaust passage into the bypass conduit; a reductant storage device disposed in the bypass conduit and configured to store ammonia in the exhaust gases; a control module configured to selectively operate the at least one valve; a first sensor configured to indicate a temperature of the exhaust flow; and a second sensor configured to indicate a temperature of the reductant storage device, wherein the first and second sensors are electronically connected to the control module; wherein the control module is further configured to open the at least one valve when: the temperature of the exhaust flow is above a first threshold; and the temperature of the reductant storage device is above a release temperature.