One or more techniques and/or systems are disclosed for providing localized heating within an engine exhaust aftertreatment system. The localized heating includes DEF injector nozzle heating with a DEF dispensing system having a DEF fluid supply and a DEF injector fluidly coupled to the DEF fluid supply. The DEF injector includes a DEF injector nozzle. The DEF dispensing system further includes a DEF heater positioned in proximity to the DEF injector nozzle. The DEF heater is configured to locally heat an area surrounding the DEF injector nozzle.

Described herein are various embodiments of a reductant decomposition system. According to one representative embodiment, the reductant decomposition system includes an exhaust gas chamber including an inlet and outlet. The system also includes a first exhaust gas distribution component positioned within the chamber and communicable in exhaust gas receiving communication with the outlet. The first exhaust gas distribution component causes swirling exhaust gas flow patterns within the exhaust gas chamber. Additionally, the system includes a second exhaust gas distribution component positioned within the chamber and communicable in exhaust gas providing communication with the inlet. The second exhaust gas distribution component includes features that cause a swirling exhaust gas flow pattern within a space defined by the second exhaust gas distribution component. Further, the system includes a reductant injector coupled to the exhaust gas chamber. The reductant injector is communicable in reductant injecting communication with exhaust gas within the chamber.

A heat pipe has a first portion positioned within an exhaust path of a gas turbine exhaust processing system and a second portion positioned in a heat exchange relationship with a flow path of a heat exchange fluid. The flow path of the heat exchange fluid includes an ammonia evaporator configured to evaporate ammonia received from an ammonia source. The heat pipe is configured to transfer thermal energy from exhaust gas in the exhaust path to the heat exchange fluid to enable the heat exchange fluid to vaporize the ammonia while cooling the exhaust gas to enable the gas turbine exhaust processing system to more effectively process the exhaust gas.

An exhaust gas purification device (26) for a gas turbine engine (10) comprises a catalyst chamber (64, 96) defined in an exhaust gas passage (22), a reduction agent container (32) containing a solid material that releases a reduction agent gas effective for NOx reduction when heated, a heating device (36, 38) for heating the solid material contained in the reduction agent container, and a reduction agent gas supply passage (48) for supplying the reduction agent gas released from the solid material into the catalyst chamber.

An apparatus includes at least one tank having a tank bottom and a delivery unit for a liquid. The delivery unit is disposed in a chamber on the tank bottom and the chamber has at least one heater.

A container is provided for a liquid operating medium of a motor vehicle. The container includes: i) an outer container which forms a container volume; ii) at least one heating device which is designed to thaw frozen operating medium, and iii) a partition which divides the container volume into a proximal region and a distal region. The proximal region is arranged closer to the at least one heating device than the distal region. The partition is designed to let through more operating medium between the proximal region and the distal region in the installation position of the container than in an oblique position of the container.

An exhaust purification device for an engine facilitates thawing of a urea aqueous solution, which is frozen in a reducing agent tank of an exhaust purification device, more rapidly. When a urea aqueous solution in a reducing agent tank is frozen at a time of starting an engine, at least a part of the urea aqueous solution to be supplied to an injection nozzle is flown into a reducing agent circulation flow path, a part of which is adjacent to a heat source, and the urea aqueous solution thus heated is returned to the reducing agent tank.

Disclosed is a method for heating liquid in a tank, including: providing at least one heating element of PTC type; providing a pulse width modulation regulator; measuring parameters including the temperature of the liquid and the voltage applied across the terminals of each heating element; heating the liquid without regulation, insofar as the temperature of the liquid is below a first threshold temperature; applying pulse width modulation regulation to the electrical supply to each heating element for which the supply voltage exceeds a predetermined threshold insofar as a measured temperature is above a second threshold temperature determined as a function of measured parameters; and determining a duty cycle for the modulation of the electrical supply to each heating element and transitioning progressively from a duty cycle of 1 to the determined duty cycle.

An aftertreatment system includes a first dosing module, a second dosing module, and a reductant tank assembly. The reductant tank assembly includes a reductant tank, a header coupled to the reductant tank, and a first splitting device that splits a first flow from the header into a first inlet flow and a second inlet flow. A first inlet line and a second inlet line direct the first inlet flow and the second inlet flow to the first dosing module and the second dosing module. A first outlet line and a second outlet line direct a first outlet flow and a second outlet flow from the first dosing module and the second dosing module to a second splitting device. The second splitting device merges the first outlet flow and the second outlet flow into a second flow and provides the second flow to the header.

Systems and apparatuses include a diesel exhaust fluid tank, a first temperature sensor positioned within the diesel exhaust fluid tank and structured to provide first temperature information indicative of a first temperature, and a second temperature sensor positioned within the diesel exhaust fluid tank and structured to provide second temperature information indicative of a second temperature. The systems and apparatuses further include one or more processing circuits including one or more memory devices coupled to one or more processors, the one or more memory devices configured to store instructions thereon that, when executed by the one or more processors, cause the one or more processors to provide energy to a heating system based on the first temperature information and the second temperature information.