Abstract:
A urea storage system (10) comprising a storage tank (12) for a urea solution is provided. The system comprises a heated reservoir (18), a channel connecting the storage tank (12) to the heated reservoir (18) and a pump (22) for drawing urea from the heated reservoir (18). A second pump (26) including an actuator comprising a memory shape metal for drawing urea from the storage tank (12) to the heated reservoir (18) is also provided.
Abstract:
A method for controlling temperature of a catalyst (14, 20). The method includes monitoring temperature of the catalyst (14, 20) and determining that the catalyst (14, 20) is outside of a catalyst (14, 20) operating temperature window. If the catalyst (14, 20) temperature is high enough for exothermic reaction to occur, reformate is injected into the catalyst (14, 20). If the catalyst (14, 20) not high enough for exothermic reaction to occur, reformate is injected upstream of the catalyst (14, 20) and ignited.
Abstract:
A method for controlling temperature of a catalyst (14, 20). The method includes monitoring temperature of the catalyst (14, 20) and determining that the catalyst (14, 20) is outside of a catalyst (14, 20) operating temperature window. If the catalyst (14, 20) temperature is high enough for exothermic reaction to occur, reformate is injected into the catalyst (14, 20). If the catalyst (14, 20) not high enough for exothermic reaction to occur, reformate is injected upstream of the catalyst (14, 20) and ignited.
Abstract:
A urea storage system (10) comprising a storage tank (12) for a urea solution is provided. The system comprises a heated reservoir (18), a channel connecting the storage tank (12) to the heated reservoir (18) and a pump (22) for drawing urea from the heated reservoir (18). A second pump (26) including an actuator comprising a memory shape metal for drawing urea from the storage tank (12) to the heated reservoir (18) is also provided.
Abstract:
A vehicle exhaust after treatment system for controlling emissions from an engine (6) includes, in serial order: an exhaust outlet (11) from the engine, an exhaust catalyst assembly (12) that is in fluid communication with the exhaust outlet (11) and includes a first NO x component (12a) coupled with a downstream oxidation catalyst (12b), and a second NO x adsorber (14) that is downstream from and in fluid communication with the oxidation catalyst (12b) of the exhaust catalyst assembly (12).