149 results about "Diesel exhaust fluid" patented technology

A system including a DEF tank and a fuel tank arranged in a portion of a vehicle to give that portion multiple structural functions. The system may be arranged to form a part of a counterweight on a work vehicle.

The invention provides a diesel exhaust fluid production method. The method comprises the following steps: sending an ammonia-and-carbon dioxide removed urea synthesis reaction liquid from the synthesis workshop section of a urea production device to a crystallization kettle, carrying out vacuum flash evaporation crystallization, centrifuging the obtained crystallization kettle material after the vacuum flash evaporation crystallization to obtain separated crystals as a diesel exhaust fluid product, and returning the obtained liquid phase material to the urea production device. The method uses a flash evaporation cooling effect to make a urea solution supersaturated and crystallized in order to obtain the high quality diesel exhaust fluid product, so the energy utilization efficiency is increased, and the diesel exhaust fluid yield is obviously higher than that in the prior art at a same crystallization temperature.

A method of operating a machine having an engine and a transmission drivably coupled to the engine is provided. The method includes determining a power usage value of a work cycle of the machine based at least on a plurality of machine parameters and determining an operating cost map based at least on a fuel price and a Diesel Exhaust Fluid (DEF) price. The method includes determining a current operating cost based on the operating cost map and a current operating condition that is based on at least one of the machine parameters. The method includes determining a low cost operating condition corresponding to an operating cost less than the current operating cost. The low cost operating condition corresponds to a power of the machine that is greater than or equal to the power usage value. The method includes regulating the transmission to obtain the low cost operating condition.

A bag-in-box dispensing system includes a box with a facing. A bag having a spout is placed with the box. A removable extension hose and a connector having snap wings for securing the extension hose to the spout is also provided. A bag-in-box dispensing system is also provided that includes a box with a facing configured with a removable flap. A bag with a spout containing a liquid inside said box is positioned within the box and a spout retracted under the removable flap. A removable extension hose is placed in the interior of the box for direct coupling to the spout or via a connector. A process of filling a vehicle DEF tank with diesel exhaust fluid (DEF) from the box is also provided.

A purge procedure which is part of an injector, that may be used as part of a reductant delivery unit (RDU), where the RDU is part of a selective catalytic reduction system for injecting diesel exhaust fluid into an exhaust system, to control exhaust emissions. The RDU delivers a reductant carrier to the engine exhaust system. The purge process includes a control strategy to improve the quality of the purge cycle (i.e., increase the amount of fluid evacuated). The sequence of the purge event is adjusted in order to generate a strong vacuum in the fluid supply line and the injector—this enhances the efficiency of the purge by increasing the initial flow rates through the injector. However, upon opening the injector, the pressure inside the fluid path increases to a level just below the ambient pressure outside the injector, therefore the gas flow rate is substantially reduced.

Diesel exhaust fluid systems are provided. The diesel exhaust fluid systems include a fluid reservoir having an inner surface and an opening therethrough, a fluid reservoir heating device positioned within the fluid reservoir, and a fluid reservoir spacer positioned within the fluid reservoir and between the inner surface of the fluid reservoir and the fluid reservoir heating device. The fluid reservoir spacer includes first and second portions on opposing sides of the opening through the fluid reservoir

A venting system for a filler pipe coupled to a diesel exhaust fluid tank in a vehicle is provided. In one example approach the venting system comprises a plurality of cut-outs in an interior surface of the filler pipe along the interior diameter of the filler pipe in a top surface of the filler pipe.

An engine temperature control system is provided for heating and/or cooling engine fluids to resist deviation of the temperature of these fluids from a temperature range wherein optimal fluid performance is achieved. Some examples of the temperature control system provide for preheating fluids such as coolant, lubricant, or diesel exhaust fluid prior to starting the engine. Other examples of the temperature control system provide for improved cooling of lubricants utilized for high heat generating components such as turbochargers, continuing cooling of these fluids after the engine is stopped.

The invention discloses an online diesel exhaust fluid solution concentration monitoring system for an automobile SCR (Selective Catalytic Reducer) system. The online diesel exhaust fluid solution concentration monitoring system comprises a power module, a coil design module and a data acquiring and processing module, which are sequentially connected through SMA (SubMiniature version A) connectors, wherein the coil design module comprises a transmitting coil, a urea tank and a receiving coil; the urea tank is used for being filled with a urea solution; the transmitting coil and the receiving coil are arranged at the outer side of the urea tank; the transmitting coil is connected with the power module through the SMA connector; the receiving coil is connected with the data acquiring and processing module through the SMA connector. The online diesel exhaust fluid solution concentration monitoring system avoids the contact between the measuring coil and the urea solution, adopts a self-resonance mode of the coil, and improves the sensitivity of the voltage at the two ends of the coil on change of concentration of the urea solution. The invention further discloses a monitoring method of the online diesel exhaust fluid solution concentration monitoring system for the automobile SCR system.

According to one embodiment, described herein is an apparatus for mitigating on-board diagnostic (OBD) faults generated by an OBD system of an internal combustion engine (ICE) system (10) having a selective catalytic reduction system (230) with a diesel exhaust fluid (DEF) decomposition tube (239). The apparatus includes a fault mitigation module (320) that is configured to monitor at least one OBD signal of the OBD system and issue a request (325) for regenerating the DEF decomposition tube when a value of the at least one OBD signal reaches a predetermined regeneration threshold corresponding with the at least one OBD signal. The regeneration threshold is reachable prior to an OBD fault threshold corresponding with the at least one OBD signal. The apparatus also includes a regeneration module (340) that is configured to regenerate the DEF decomposition tube according to the issued request.

An exhaust gas treatment system for an internal combustion engine is provided having an exhaust gas conduit, a diesel exhaust fluid (“DEF”) source, a selective catalytic reduction (“SCR”) device, a NO_x sensor, and a control module. The DEF source supplies a DEF having a quality factor. The NO_x sensor is in fluid communication with the exhaust gas conduit. The NO_x sensor is located downstream of the SCR device and is configured for detecting a NO_x concentration value. The control module is in communication with the DEF source and the NO_x sensor. The control module stores a diagnostic adaptation factor and an expected NO_x value. The control module includes a dosing module for determining a controls adaptation factor that is based on a deviation between the NO_x concentration value and the expected NO_x value. The diagnostic adaptation factor is selectively updated with the controls adaptation factor.

A secondary containment system used to transport and store a tank containing diesel exhaust fluid. The secondary containment system having a containment body comprising an end wall, a back wall, two side walls, a bottom, and a top, wherein the walls are integral to the bottom, and wherein the top can be displaced from the containment body. The containment body is constructed of a three-layer configuration comprising an inner layer, an outer layer, and a central layer sandwiched therebetween. The inner layer defines a chamber in which the tank containing diesel exhaust fluid is stored. The chamber is sized and shaped so that the tank is positioned in the chamber and defines a void between walls of the inner layer and the tank containing diesel exhaust fluid. The inner layer and outer layer are preferably constructed of a UV protected polyethylene, and the central layer is constructed of a 2″-2 lb. density polyurethane insulation material having an R17 value.

The invention discloses an ejection metering module for SCR (selective catalytic reduction) and a controlling method of the ejection metering module. The ejection metering module comprises a support, a pulse pump mounted at one end of the support, an upper end cover fixed at the other end of the support, an ejection nozzle and a controller, and is characterized in that the support extends from the upper portion of a DEF (diesel exhaust fluid) storage tank deeply to the bottom of the DEF storage tank and is fixed on the diesel exhaust fluid storage tank via the upper end cover, the controller controls the pulse pump to work, the pulse pump comprises a solenoid driver, a plunger pump and an internal flow passage which penetrates through the pulse pump axially, working fluid (DEF) enters an inlet of the internal flow passage via a first filter arranged at the inlet at the lower end of the internal flow passage, an outlet of the internal flow passage is higher than the inlet of the same in arrangement, part of the working fluid in the internal flow passage is pumped to the ejection nozzle through the plunger pump, and the other part of the working fluid is drained from the pulse pump via the outlet of the internal flow passage. Characteristic parameters of the pulse pump are prestored in the controller, so that the ejection metering module is capable of working in a slave mode or an intelligent (master) mode.

A method is provided for controlling injection of Diesel Exhaust Fluid into an exhaust pipe (30) of an internal combustion engine (10) equipped with a Selective Reduction Catalyst. The method includes, but is not limited to monitoring a value of a control parameter influencing an operation of the Selective Reduction Catalyst (33), injecting a quantity of Diesel Exhaust Fluid, controlling the quantity of Diesel Exhaust Fluid (QDEF) to be injected employing a closed loop procedure or an open loop procedure, switching between the closed loop procedure and the open loop procedure, when value of the control parameter crosses a first threshold value of the control parameter.

A diesel exhaust fluid (DEF) delivery system includes a tank for DEF, usually a urea aqueous solution, and a pump receiving the DEF from the tank for pressurization and delivery through a nozzle to the exhaust system of a work machine. A breather assembly is provided for the DEF tank and includes a housing having an inlet for ambient air and a particle filter adjacent the inlet for filtering particles. A hydrophobic membrane is interposed between the particle filter and an outlet leading to the tank for preventing outflow of DEF vapor and condensate.

Modification of reductant (e.g., diesel exhaust fluid, DEF) tank location, for example during vehicle up-fitting may result in less than optimal operation of the DEF system due to inaccurate DEF system calibration. In one example approach, the above issue can be at least partially addressed by adjusting control system parameters for system control and diagnostics based on an input indicative of, or any modification to, the DEF tank location. In this way, DEF tank location flexibility is maintained, while also maintaining emission control and diagnostic accuracy.

An after-treatment system (200) includes, in series along an exhaust gas flow direction through the after-treatment system (200): a diesel oxidation catalyst (108)), a diesel exhaust fluid (DEF) delivery device, a soot- reducing device and a selective catalytic reduction (SCR) catalyst.

A method for controlling dosing of a diesel exhaust fluid includes providing a diesel engine and an exhaust system. The exhaust system includes an exhaust aftertreatment device and is coupled to the diesel engine. An injection device is provided in the exhaust system for dosing the diesel exhaust fluid into the exhaust system according to a predetermined routine. A water condensation content of the exhaust aftertreatment device is determined. A dosing event, directed by the predetermined routine, is precluded so that the injection device is not operated to provide diesel exhaust fluid to the exhaust aftertreatment device when the water condensation content of the exhaust aftertreatment device is determined to be above a specified threshold value.

An exhaust system for a diesel engine is provided. The exhaust system includes a component body with a surface, and a surface treatment disposed on some of the surface or all of the surface. The surface treatment is disposed so as to receive Diesel Exhaust Fluid (DEF) injected into the exhaust system during operation of the diesel engine. The surface treatment facilitates increased heat transfer to the received DEF to promote water evaporation and urea thermolysis of the received DEF.

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.