Abstract: A diesel exhaust gas system includes a diesel particulate filter (DPF), a trap for nitrogen oxides (LNT), a hydrocarbon catalytic reformer for generating reformate, and an air supply. A method for controlling the rate of burn of soot in a DPF limits the oxygen percentage in the exhaust to about 6%. The LNT may be located ahead of the DPF in the exhaust line. Reformate is directed with exhaust through the LNT. The second flow of air cools the exhaust gas and thereby prevents overheating of the DPF substrate. The DPF also may be located ahead of the LNT. Reformate is controllably combusted by the second air flow in the DPF, reducing the oxygen percentage to about 6%, thus limiting the rate at which soot in the DPF can burn and thereby preventing overheating of the DPF substrate.

Abstract: In one embodiment, a method of heating an exhaust treatment device can comprise: generating reformate in a reformer, wherein the reformate comprises hydrogen; introducing oxygen to the reformate prior to combining the reformate with another stream; combusting a portion of the reformate and generating an exotherm to form heated reformate; and introducing the heated reformate to the exhaust treatment device. In one embodiment the exhaust system can comprise: a reformer; a reformate conduit disposed in physical communication with a reformate outlet of the reformer; an exhaust treatment device disposed in fluid communication with the reformer; and an oxygen supply disposed in fluid communication with the reformate conduit such that oxygen can be introduced into the reformate conduit upstream of a reformate conduit outlet, wherein the reformate conduit outlet is disposed in physical communication with an exhaust conduit and/or the exhaust treatment device.

Abstract: A diverter valve is disclosed and may comprise an actively cooled valve actuation section, an actuator, and a valve section comprising a rotationally actuated valve plate that is structured to be rotationally actuated by the actuator to direct flow wherein the actuation section may be thermally insulated from the valve actuation section.

Abstract: In one embodiment, a reductant system comprises: a high pressure reductant pump in operable communication with a power source, wherein the reductant pump comprises a reductant chamber and is capable of pressurizing reductant to a pressure of greater than or equal to 500 psi; a reductant reservoir in fluid communication with the reductant chamber; and an atomizer in fluid communication the reductant chamber. In another embodiment, the reductant system comprises: a reductant pump; system pump in operable communication the reductant pump, a reductant reservoir in fluid communication with the reductant chamber, and an atomizer in fluid communication the reductant chamber. The system pump is configured to provide motive power via a pressurized fluid to the reductant pump, and the system pump is fluidly isolated from a reductant chamber in the reductant pump.

Abstract: A method and system for introducing supplemental material to an exhaust aftertreatment device, including: a delivery system, an air pump operable to input pressurized air to the delivery system, and a turbosupercharger of an internal combustion engine operable to deliver pressurized air to an inlet of the air pump. The supplemental material introduced to the exhaust aftertreatment device is pressurized by the pressurized air input from the air pump, and the air inlet to the air pump is pressurized by the turbosupercharger for the internal combustion engine. The delivery system uses existing pressurized air generated within the engine system from the turbosupercharger to supplement air pressure supplied to the turbine-style air pump used by the delivery system. The supplemental material may comprise ammonia, hydrogen, carbon monoxide, or urea.

Abstract: A method for controlling exhaust gases produced by an internal combustion engine, a medium encoded with a machine-readable computer program code for controlling exhaust gases produced by an internal combustion engine and a system for controlling exhaust gases produced by an internal combustion engine is provided wherein the system includes a vehicle sensor and an engine control module and wherein the method includes obtaining a vehicle data signal responsive to the engine performance of the internal combustion engine, processing the vehicle data signal so as to formulate an engine operating parameter, wherein the engine operating parameter is responsive to the hydrocarbon content of the exhaust gases and controlling the fuel introduced into the internal combustion engine in a manner responsive to the engine operating parameter.