Abstract: An aftertreatment system for an engine is disclosed. The aftertreatment system may include an exhaust passage configured to receive an exhaust flow from the engine, and an injector disposed in the exhaust passage and configured to inject reductant into the exhaust flow. The aftertreatment system may also include 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, and a reductant storage device disposed in the bypass conduit and configured to store ammonia in the exhaust gases. The aftertreatment system may also include a control module configured to selectively operate the at least one valve.

Abstract: An engine system is provided. The engine system includes a passageway having an inner surface and an outer surface. The passageway is adapted to allow a flow of air therethrough. The engine system also includes a sensor provided in the passageway and in contact with the air. The sensor is adapted to sense a parameter of the air. The engine system further includes a hydrophobic coating having a micropatterned texture provided on at least one of the inner surface of the passageway and the sensor. The hydrophobic coating is adapted to limit deposition of at least one of a fluid and a solid thereon.

Abstract: An aftertreatment system for an engine is disclosed. The aftertreatment system may include an exhaust passage configured to receive an exhaust flow from the engine, and an injector disposed in the exhaust passage and configured to inject reductant into the exhaust flow. The aftertreatment system may also include 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, and a reductant storage device disposed in the bypass conduit and configured to store ammonia in the exhaust gases. The aftertreatment system may also include a control module configured to selectively operate the at least one valve.