Abstract: A urea supply conduit (68) has a wall of good thermal conductivity. Urea solution in liquid phase is sucked out of a tank (24) through conduit (68) and delivered to a point of use (22) in an engine exhaust after-treatment system (18) through which products of combustion are conveyed from engine combustion chambers (16) to atmosphere. Liquid engine coolant is circulated through a coolant conduit (66) that has a wall of good thermal conductivity placed side-by-side and in physical association with the urea supply conduit wall to form a thermal conduction path for heat transfer between coolant in the coolant conduit and urea in the urea supply conduit, more quickly thawing any frozen urea.

Abstract: A system for use in injection of a liquid reductant into an exhaust gas (20) and for evaporating the liquid reductant includes an exhaust pipe (12) having an interior area (15). Exhaust gas (20) flows through the interior area (15) of the exhaust pipe (12), the flow of exhaust gas being at an elevated temperature from the ambient. A deflection plate (118) has a non-planar shape and is disposed within the interior area (15) of the exhaust pipe (12). An injector (14) injects the liquid reductant into the exhaust pipe (12) and directs the liquid reductant at the deflection plate (118).

Abstract: A system and method for estimating the effect of forced regeneration of a diesel particulate filter (22) by post-injection of fuel on fuel dilution of engine motor oil.

Abstract: A system and method for estimating the effect of forced regeneration of a diesel particulate filter (22) by post-injection of fuel on fuel dilution of engine motor oil.