Abstract: A baffle of an exhaust gas pressure sensor assembly is disposed at an exhaust manifold of an internal combustion engine and includes an exhaust gas pressure sensor configured to sense a pressure of exhaust gas at the exhaust manifold. The baffle includes a conduit, a plate disposed within the conduit separating the exhaust gas volume into a first portion and a second portion, and a plurality of apertures disposed through the plate and configured to provide fluid communication of the exhaust gas between the first portion of the exhaust gas volume and the second portion of the exhaust gas volume such that each of the plurality of apertures is centered radially outside of an inner passageway to a diaphragm of the exhaust gas pressure sensor.

Abstract: Disclosed is a reductant delivery system comprising a reductant tank, a reductant delivery mechanism, a reductant pressure source, and an extraction passage. The extraction passage is coupled fluidly to the reductant tank and the reductant pressure source therebetween. The reductant delivery system also comprises a reductant manifold that comprises a junction positioned therein. Further, the reductant manifold comprises (1) a supply passage coupled fluidly to the reductant pressure source and the junction therebetween, (2) a dosing passage coupled fluidly to the reductant delivery mechanism and the junction therebetween, and (3) a return passage coupled fluidly to the reductant tank and the junction therebetween. The reductant delivery system comprises a reductant quality sensor positioned in the supply passage.