Patent application number | Description | Published |
20110146236 | Exhaust Aftertreatment System - An exhaust aftertreatment system including an exhaust flow area, a first bank of one or more exhaust treatment devices in fluid communication with the exhaust flow area and a second bank of one or more exhaust treatment devices in fluid communication with the exhaust flow area. The first bank may be arranged in parallel with the second bank and inlet of the first bank is configured to provide greater flow resistance to the exhaust than the inlet of the second bank | 06-23-2011 |
20120073264 | REDUCTANT DOSING SYSTEM - A reductant dosing system for an engine is disclosed. The reductant dosing system may have a supply of reductant, a reservoir configured to hold pressurized reductant, and a pump configured to draw reductant from the supply and discharge reductant at an elevated pressure into the reservoir. The reductant dosing system may also have a plurality of injectors fluidly connected to the reservoir, and a drain valve fluidly connected between the reservoir and the supply. | 03-29-2012 |
20120151902 | BIASED REDUCTANT MIXER - An engine exhaust aftertreatment system including a mixer with a varying contact area that assists in the introduction and conversion of a reductant introduced by an injector. | 06-21-2012 |
20120159928 | System and method for introducing a reductant agent - A system and method controls injection of a reductant agent in a selective catalytic reduction system. The system and method include an injector injecting the reductant agent to an exhaust system directing exhaust from a power system. A coolant system circulates coolant proximate to the injector. A coolant temperature sensor monitors a coolant temperature of the coolant. A controller adjusts the injection timing of the injector based at least in part on the coolant temperature. | 06-28-2012 |
20130000729 | DEF PUMP AND TANK THAWING SYSTEM AND METHOD - A fluid supply system configured to be utilized with a coolant system of an engine, the fluid supply system including; a fluid tank, a fluid pump coupled to the fluid tank and a thermal management system in thermal communication with the fluid tank and the fluid pump, wherein the thermal management system includes; a first coolant circuit in thermal communication with the fluid tank and a second coolant circuit in thermal communication with the fluid pump, wherein flow of coolant from the coolant system through the first fluid circuit and second fluid circuit is in parallel when coolant flows through the second fluid circuit. | 01-03-2013 |
20130219871 | Mounting Assembly for a Reductant Injector - A mounting assembly for an injector is located in a curved portion of an exhaust line having an exhaust flow from an upstream end to a downstream end. The mounting assembly includes an indent extending at least partially into the exhaust line curved portion and disposed in the exhaust flow. The downstream wall has an interior surface oriented to substantially face the exhaust line downstream end. A recess extends from the downstream wall in a direction away from the exhaust line downstream end, and a recess aperture is formed in the recess and configured to fluidly communicate with the injector. The recess reduces the amount of exhaust heat reaching the injector tip. | 08-29-2013 |
20140286832 | EXHAUST SYSTEM - An exhaust system is provided. The exhaust system includes an exhaust conduit having a protuberance thereon. A reductant injector is provided on the protuberance. The reductant injector is positioned such that an ejection tip of the reductant injector is inclined with respect to a centerline of the exhaust conduit. A baffle assembly is coupled to an inner wall of the exhaust conduit. The baffle assembly is positioned upstream of the ejection tip of the reductant injector. A first plate of the baffle assembly is positioned parallel to the centerline of the exhaust conduit. A second plate of the baffle assembly extends from the first plate. The second plate is positioned angularly with respect to the first plate. The baffle assembly is configured to deflect at least a portion of an exhaust gas flow over the ejection tip of the reductant injector. | 09-25-2014 |
20140331645 | System and Method for Injector Fault Remediation - A machine includes an engine having an exhaust system. A diesel exhaust fluid (DEF) injector provides metered amounts of DEF and includes a valve adapted to selectively open in response to a command. A controller associated with the engine and the DEF injector monitors operation of the DEF injector to detect a fault and activates a failure remediation cycle when the fault has been detected. The remediation cycle includes heating the exhaust gas to heat the DEF injector and melt any urea crystals that may be causing the fault, and activating the valve of the DEF injector to evacuate molten urea from within the DEF injector. | 11-13-2014 |
20140331655 | Mounting Assembly for a Reductant Injector - A mounting assembly for an injector is located in a curved portion of an exhaust line having an exhaust flow from an upstream end to a downstream end. The mounting assembly includes an indent extending at least partially into the exhaust line curved portion and disposed in the exhaust flow. The downstream wall has an interior surface oriented to substantially face the exhaust line downstream end. A recess extends from the downstream wall in a direction away from the exhaust line downstream end, and a recess aperture is formed in the recess and configured to fluidly communicate with the injector. The recess reduces the amount of exhaust heat reaching the injector tip. | 11-13-2014 |
20150023843 | REDUCTANT SUPPLY SYSTEM - An aftertreatment system is disclosed. The aftertreatment system includes an exhaust conduit and a selective catalytic reduction module. The aftertreatment system also includes a reductant supply system. The reductant supply system includes a reductant tank, a reductant injector, and a pump assembly. The pump assembly includes a reversing valve assembly and a pump unit. The pump assembly also includes a plurality of check valves, a pressure sensor, and a filter. Further, the reductant supply system includes a back flow valve assembly. The reductant supply system also includes at least two header units associated with the pump assembly. The at least two header units include a reductant draw conduit and at least one heat exchanger. The at least two header units also include a bag filtration assembly. | 01-22-2015 |