Abstract: The teachings may find particular use in providing thermal enhancement, such as with hydrocarbon, to a catalyst for regeneration and particulate burn-off of a filter. The teachings relate to an exhaust aftertreatment apparatus including: a) a reactor portion, b) a mixer located within the reactor portion, including: i) an outer tube; ii) an inner tube located within the outer tube; iii) an outer passage formed between a wall of the reactor portion and the outer tube; iv) an intermediate passage formed between the outer tube and the inner tube; and iv) an inner passage formed within the inner tube; and c) an injector in fluid communication with the reactor portion and upstream from the mixer, wherein the injector is configured to spray a reactant into the reactor portion such that it mixes with the exhaust stream in the mixer.

Abstract: An exhaust aftertreatment apparatus comprising: a) a reactor portion which is tubular and has a flow axis parallel with its longitudinal axis, wherein the reactor portion is configured to receive an exhaust stream in a first end region; b) a mixer located within the reactor portion and located downstream of the first end region, wherein the mixer includes at least a portion of a mixing tube which extends at an angle transverse to the longitudinal axis of the reactor portion; c) an outer tube located about at least a portion of the mixing tube and projecting from an exterior of the reactor portion; and d) an injector in fluid communication with the outer tube and the mixing tube and distanced from the reactor portion, wherein the injector is configured to spray a reductant toward the outer tube and the mixing tube.

Abstract: A heat exchanger for a vehicle is provided, where the heat exchanger includes core having first, and second sets of flow tubes extending between first and second headers and defining separate flow paths. One of the headers includes a first portion in fluid communication with the first set of flow tubes and a second portion defining a receiver/dryer chamber that is in fluid communication with the second set of flow tubes. A dryer is located within the receiver/dryer chamber.

Abstract: A heat exchanger having an improved oil cooler section is provided. The oil cooler section includes a first manifold, a second manifold, an oil inlet port, an oil outlet port, cooling tubes, and a return tube. The first and second manifold are located in spaced relationship and the oil inlet and outlet port are located proximate each other toward one side of the heat exchanger. The cooling tubes are connected between the first and second manifold, each tube defining an oil flow passage. The return tube also be connected between the first and second manifold and defining an oil return passage. The oil return passage has a cross-sectional area larger than each of the oil flow passages allowing the oil to be returned along a low pressure flow path.

Abstract: A heat exchanger includes a first section and a second section for cooling distinct fluids, wherein the second section is adapted for cooling oil. The heat exchanger includes first and second manifolds divided by baffles into first and second chambers. A plurality of tubes connect the manifolds in fluid communication with the first chambers to form the first section of the heat exchanger. A plurality of oil cooling tubes connect the manifolds in fluid communication with the second chambers to form the second section. The oil cooling tubes have a cross-section characterized by a performance ratio between about 3.9 and 8.5 wherein the performance ratio is the ratio of the wetted perimeter in millimeters divided by the cross-sectional area of tube metal in square millimeters. The oil cooling tubes may be formed of extruded metal with internal fins or an extruded tube having a stamped metal insert.