Patent application number | Description | Published |
20080277225 | Three-pass torque converter with sealed piston and forced cooling flow - A torque converter assembly including a cover shell and a piston for a lock-up clutch. The piston is fixedly attached to the cover shell and the piston is flexible to operate the clutch. At least a portion of the piston at the point of attachment to the cover shell is in contact with the cover shell. The piston forms a portion of a sealed chamber and the piston is displaceable in response to fluid pressure in the chamber. In one embodiment, the attachment is made by projection welding proximate an inner diameter of the piston or by riveting proximate an inner diameter of the piston. | 11-13-2008 |
20080277226 | Stamped pilot welded to a cover - A torque converter including a cover having a central longitudinal axis and an outer surface and a pilot stamped from metal. The pilot includes a disc at least partially radially aligned with the axis for the cover. The pilot and the cover central axis are fixedly secured to each other. In a first embodiment, the disc is flat. In a second embodiment, the disc is annular. In a third embodiment, the pilot includes a machined outer circumferential surface. In a fourth embodiment, the pilot includes first and second portions radially off-set with respect to one another. In a fifth embodiment, the pilot includes a portion axially extending from the portion of the disc at least partially radially aligned with the axis for the cover. In a preferred embodiment, the cover and pilot are fixedly secured by welding. | 11-13-2008 |
20090107792 | Series damper with hysteresis in one damper - A series damper, including: a first damper with a flange and a cover plate; and a second damper with first and second cover plates and a flange. The flange and the cover plate for the first damper are rotationally frictionally engaged and the flange for the second damper rotates free of frictional engagement with the first and second cover plates. The series damper includes a resilient element arranged to cause the frictional engagement of the flange and the cover plate for the first damper. In some aspects, the resilient element is frictionally engaged with the cover plate for the first damper and is arranged to frictionally engage a turbine hub for a torque converter. In some aspects, the resilient element is rotationally connected to the flange for the first damper. In some aspects, the flange for the first damper includes the second cover plate for the second damper. | 04-30-2009 |
20090125202 | Torque converter with turbine mass absorber - A torque converter having a first damper stage, a second damper stage, a floating flange torsionally connecting the first and second damper stages, an inertia element, and a tuned torsion damper. The torsion damper connects the inertia element and the flange. In a preferred embodiment, the inertia element is a turbine. In one embodiment, the first damper stage is a radially outer damper stage and the second damper stage is a radially inner damper stage. In another embodiment, the torsion damper generates a friction torque when rotated. | 05-14-2009 |
20100234114 | DAMPER WITH INDUCED IMBALANCE - A torsion damper including: a plurality of springs; a first plate with a central axis; and a second plate with a central axis. The plurality of springs displaces the first and second plates so that the central axis for the first plate is radially offset from the central axis for the second plate. In one embodiment, the radial offset between the central axis for the first plate and the central axis for the second plate is fixed. In another embodiment, the first plate comprises a central bore and the second plate comprises an extruded cylinder; and the fixed alignment is maintained by contact between the central bore and the extruded cylinder. | 09-16-2010 |
20110088992 | PISTON PLATE CONNECTION WITH BLIND RIVETING - A clutch assembly for a torque converter, including: a cover; a piston plate including a hole; and a rivet in the hole. The rivet includes a rivet head. Prior to applying pressure to the rivet to fix the rivet to the piston plate, the rivet head is clamped between the piston plate and the cover. A clutch assembly for a torque converter, including: a cover; a piston plate with a hole; a leaf spring with a first end fixedly attached to the cover and a second end; and a rivet connecting the second end of the leaf spring to the piston plate. The rivet includes: a head disposed between the leaf spring second end and the cover; and a shaft in the piston plate hole. The piston plate or the cover is deflectable to clamp the rivet head between the cover and the piston plate before the shaft is expanded. | 04-21-2011 |
20110247322 | Torque Converter with Turbine Mass Absorber - A damper assembly for a torque converter includes a drive side elastic element arranged for transmitting torque to a turbine for the torque converter in a first direction and a coast side elastic element, separate from the drive side elastic element, arranged for transmitting torque to the turbine in a second direction opposite the first direction. In an example embodiment, a slope of a torque curve for the damper remains constant in a transition region between transmitting torque to the turbine in the first direction and transmitting torque to the turbine in the second direction. In an example embodiment, the damper assembly includes an input damper and an output damper. The elastic elements are disposed in a torque path between the input damper and the output damper. In an example embodiment, the input damper is selectively engaged with a cover for the torque converter and the output damper is drivingly engaged with an output hub for the torque converter. | 10-13-2011 |
20110263341 | TRANSMISSION INPUT SHAFT BLADE - A flat blade for a transmission input shaft includes a substantially rectangular body portion for insertion in a center bore of the input shaft and at least one radial blade segment extending from the body portion. The radial blade segment is arranged for assembly proximate a distal end of the input shaft and for extending radially beyond the center bore. In an example embodiment, the radial blade segment is substantially rectangular in shape. In an example embodiment, the radial blade segment is a pair of radial blade segments extending in opposing directions. In an example embodiment, the body portion is arranged for press-fitting into the center bore. | 10-27-2011 |
20120011838 | HUB SEAL - A hub seal assembly includes a hub having a groove with a first radial wall, a first floating seal including a second radial wall, and a resilient element. The first floating seal is axially displaced by the resilient element so that the second radial wall contacts the first radial wall. In an example embodiment, the first floating seal includes polytetrafluoroethylene. In some example embodiments, the resilient element is an o-ring. In an example embodiment, the first floating seal includes a circumferential groove or a notch and the o-ring is at least partially disposed in the groove or the notch. | 01-19-2012 |
20120018267 | RELEASE FLOW HUB - A hub assembly for a torque converter includes a hub with a circumferential groove and a seal arranged to contact an element of the torque converter. The seal is at least partially disposed in the groove. The groove has a first radial wall, a second radial wall axially offset with respect to the first radial wall, and at least one opening in the second radial wall. The seal is axially displaceable to seal against the first wall to block fluid flow between the hub and the element and to seal against the second radial wall and enable fluid flow through the opening. | 01-26-2012 |
20120241271 | TORQUE CONVERTER CLUTCH AND DAMPER - A clutch and damper assembly for a torque converter includes a clutch piston with a piston friction surface for engaging the clutch and an outer sealing diameter, and a damper. The piston friction surface is disposed radially inward of the damper and the outer sealing diameter is disposed radially outward of the damper. In an example embodiment, the clutch piston includes an inner sealing diameter disposed radially inward of the piston friction surface. In some example embodiments, the damper includes a resilient element and a drive plate. The drive plate is drivingly engaged with the resilient element and frictionally engageable with the clutch piston. | 09-27-2012 |
20130056319 | TORQUE CONVERTER CLUTCH WITH LOW BACK PRESSURE - A torque converter includes an impeller shell and a backing plate defining at least a portion of a first hydraulic chamber, a cover and a piston plate defining at least a portion of a second hydraulic chamber, and a third hydraulic chamber. The third chamber is sealed from the first and second hydraulic chambers such that a hydraulic flow between the third chamber and the other chambers is at least restricted. In an example embodiment, the first chamber is for being pressurized to prevent cavitation in the turbine, stator, or impeller, the second or third chamber is for being pressurized to engage the lockup clutch, and the other of the second or third chamber is for being de-pressurized to reduce a back pressure on the lockup clutch piston plate. | 03-07-2013 |
20130224002 | COVER HUB WITH SEALING RING - A cover hub for a torque converter includes a radial wall arranged for axial alignment with a cover of the torque converter, a first circumferential surface including an opening for receiving a seal, and a second circumferential surface disposed radially inside of the first circumferential surface and arranged for sealing to a transmission input shaft. The hub has a first fluid passage exiting the hub at a first axial side of the opening and a second fluid passage, circumferentially offset from the first fluid passage and exiting the hub on a second axial side of the opening, opposite the first axial side, and a first circumferential protrusion for sealing the hub to the cover. | 08-29-2013 |
20130230385 | TURBINE PISTON - A torque converter includes an impeller with a plurality of impeller blades and a shell with a radial wall disposed radially outside of the blades. The converter also includes a cover fixed to the impeller shell to form a housing, and a turbine. The turbine includes a plurality of turbine blades and a shell with a radial wall disposed radially outside of the turbine blades. The turbine radial wall is arranged to frictionally engage the impeller shell radial wall. In some example embodiments, the turbine shell includes indented slots and the turbine blades include tabs disposed in the slots. In an example embodiment, the turbine blades are fixed to the turbine shell by brazing. | 09-05-2013 |
20140097055 | TURBINE PISTON THRUST PATH - A torque converter includes a torus with an impeller and a turbine having respective shells, a cover shell, and a first damper plate. The impeller shell has a radial wall disposed radially outside of the torus and the turbine shell has a radial wall arranged for frictionally engaging the impeller shell radial wall. The cover shell has a radial wall and the first damper plate has a radial wall for transmitting a turbine shell thrust force to the cover shell radial wall. In an example embodiment, the torque converter includes a friction material ring fixedly attached to the turbine shell radial wall or the impeller shell radial wall. In some example embodiments, the torque converter includes a friction material ring fixedly attached to the cover shell radial wall or the first damper plate radial wall. | 04-10-2014 |
20140144746 | FRICTION PLATE WITH COMPRESSED OVERLAPPING SECTIONS - A friction material part is provided. The friction material part includes a first segment and a second segment, an end of the first segment overlapping an end of the second segment to form a joint that is compressed more than intermediate portions of the first and second segments. A method for manufacturing a friction material part is also provided. The method includes overlapping an end of a first friction material segment and an end of a second friction material segment; and compressing the overlapped ends to form a compressed joint. | 05-29-2014 |
20140144747 | FRICTION PLATE HAVING MECHANICALLY CONNECTED FRICTION MATERIAL - A method of forming a friction plate is provided. The method includes force fitting a friction material onto a base to form a mechanical connection between the friction material and the base. A friction plate is also provided. The friction plate includes a base and a friction material force fit onto the base such that a mechanical connection is formed by a shape of the friction material and a shape of the base. | 05-29-2014 |
20140298786 | TORQUE CONVERTER BEARING CENTERING PLATE - A torque converter having a housing with an impeller wall section, and pump vanes brazed to the impeller wall section. The housing is connected to an output of an engine for rotation about a longitudinal axis. A turbine having turbine vanes that are connected to a hub is located about the longitudinal axis within the housing and is connected to an input shaft of a transmission. A stator is located between the pump vanes and the turbine vanes. In order to allow for a thinner housing wall, particularly an area of the impeller wall section, an annular retainer plate is brazed to the impeller wall section about the longitudinal axis and forms a reinforcement. A rolling bearing is located between the retainer plate and the stator, and is used in supporting the housing. An assembly method is also provided. | 10-09-2014 |
20140321782 | THRUST WASHER INCLUDING WET FRICTION MATERIAL WITH RESIN COATED SURFACE - A thrust washer is provided. The thrust washer includes a wet friction material and a phenolic resin layer coating an outer surface of the wet friction material. A torque converter comprising the thrust washer is also provided. A method of forming a thrust washer is further provided. The method includes providing a layer of phenolic resin on an outer surface of a wet friction material. | 10-30-2014 |
20140339045 | REDUCED DRAG CLUTCH PLATE - A clutch plate includes an annular body and an integral resilient portion connected to the annular body by a first circumferentially extending tab. The annular body has inner and outer diameters and first and second parallel surfaces extending therebetween. The resilient portion has third and fourth parallel surfaces extending at respective acute angles to the first and second parallel surfaces. In some example embodiments, the clutch plate includes a wet friction material affixed to the first and third surfaces. In an example embodiment, the clutch plate has a wet friction material affixed to the second and fourth surfaces. In an example embodiment, the clutch plate has first and second circumferential slots respectively disposed radially inside and outside of the first circumferentially extending tab. | 11-20-2014 |
20150020512 | TORQUE CONVERTER WITH TURBINE MASS ABSORBER - A piston plate assembly for a torque converter comprising: an aperture including a chamfer portion; and, a bushing installed in the aperture and including a radius portion proximate the chamfer portion, wherein the bushing is arranged to seal the piston directly to a transmission input shaft and the radius portion is arranged to ease assembly of the bushing onto the input shaft. | 01-22-2015 |
20150027110 | TORQUE CONVERTER INCLUDING AN ELASTIC ELEMENT PRELOADING AN AXIALLY MOVABLE TURBINE - A torque converter is provided. The torque converter includes an impeller; a turbine axially movable toward and away from the impeller; and a damper coupled to the turbine, the damper including an elastic element forcing the turbine against the impeller in a no pressure condition. A method of forming a torque converter is also provided. The method includes forming a damper to include an elastic element; providing the damper inside a front cover so the damper contacts the front cover; and providing axially movable turbine between the damper and an impeller such that the elastic element forces the turbine to engage an impeller in a no pressure condition. | 01-29-2015 |
20150096857 | STATOR ASSEMBLY WITH INNER RACE PILOT RING - A stator assembly for a torque converter includes a housing, a blocking element, an inner race, and a first ring. The housing includes a plurality of stator blades, a central axis, and a pocket. The blocking element is disposed in the pocket and is pivotable about an axis parallel to the central axis. The inner race includes an outer notch for engaging the blocking element, an inner spline for engaging a transmission shaft, and a first outer piloting surface. The first ring is for radially positioning the housing on the inner race first outer piloting surface. In some example embodiments, the housing includes a bore and the first ring is pressed into the housing bore. In some example embodiments, the housing includes a radially extending surface in contact with the first ring. In an example embodiment, the radially extending surface limits axial displacement of the inner race. | 04-09-2015 |
20150152949 | PILOTING SLEEVE FOR CENTERING TRANSMISSION INPUT SHAFT - A piloting sleeve for a torque converter comprising: (i) an axis of rotation; (ii) a tubular body portion including a circumferential wall comprising: a first inner circumferential surface having a first inner diameter; a second inner circumferential surface having a second inner diameter; a first outer circumferential surface having a first outer diameter; (iii) an extended portion including at least two castles, each including a tip portion, for attachment to a cover; and (iv) a distal end. A transmission assembly comprising: a transmission input shaft and a torque converter including the piloting sleeve as described. | 06-04-2015 |
20150184701 | TORQUE CONVERTER INCLUDING STATOR THRUST BEARING - A torque converter is provided. The torque converter includes an impeller including an impeller shell, a turbine including a turbine shell and a stator axially between the turbine and the impeller. A first fluid flow is generated between the impeller and the stator and a second fluid flow is generated between the turbine and the stator. The torque converter further includes a thrust bearing axially between the impeller and the stator or axially between the turbine and the stator. The thrust bearing includes a bearing surface arranged for maintaining a hydrodynamic film thereon in a region of the first fluid flow or the second fluid flow during operation of the torque converter. A method of forming a torque converter is also provided. | 07-02-2015 |
Patent application number | Description | Published |
20110278121 | DAMPER HUB FRICTION PACKAGE - A friction assembly for a torque converter, including: a side plate for a damper in the torque converter; a plate; an output hub for connection to an input shaft for a transmission; and a diaphragm spring. The side plate and the plate are fixedly connected to a turbine shell for the torque converter. The diaphragm spring is directly engaged with the output hub so that the diaphragm spring rotates with the output hub and is axially displaceable with respect to the output hub. The diaphragm spring is directly engaged with the side plate and the plate so that the diaphragm spring is axially restrained by the side plate. The plate and is rotatable with respect to the side plate and the plate. | 11-17-2011 |
20110315498 | TORQUE CONVERTER WITH IMPROVED TORQUE CONVERTER CLUTCH PERFORMANCE - A torque converter, including: a cover; a first through bore for receiving a transmission input shaft; a clutch including a piston plate; a plurality of fasteners connected to the cover; and a plate connected to the cover. The plate includes a radially aligned wall including a plurality of openings in which the plurality of fasteners is disposed; a second through bore at least partially aligned, in an axial direction, with the first through bore; and a plurality fins extending from the radially aligned wall in the axial direction. Each fin includes a first end aligned with the first and second through bores in the axial direction. Each fin includes a second end disposed radially within the plurality of openings. A space, aligned with an axis of rotation for the torque converter and the second through bore, is formed between the respective first ends. | 12-29-2011 |
20120073279 | RIVET FOR USE WITH ANGLED FIXTURE AND METHOD THEREOF - A method of connecting plates in a torque converter including: forming a head of a rivet with an end surface that is curved or forms multiple planes; forming a portion of an interior surface of the cover to protrude or indent with respect to a surrounding portion of the interior surface; disposing the body of the rivet in respective holes in respective portions of the plates; and displacing the plates such that the end surface of the rivet head contacts the portion of the interior surface, the respective portions of the first and second plates are at an acute angle with respect to the surrounding portion of the interior surface, and a longitudinal axis of the rivet is at an acute angle with respect to a line orthogonal to the surrounding portion of the interior surface. | 03-29-2012 |
20120073926 | PISTON SEAL WITH CENTERING WASHER - A torque converter, including: a piston plate for a lock-up clutch, the piston plate including a circumferential surface forming an opening axially aligned with an axis of rotation for the torque converter; a ring-shaped element fixedly secured to the piston plate; and a seal in compressive engagement with the circumferential surface, axially aligned with the ring-shaped element, and including a surface facing radially inward for forming a seal with an input shaft inserted into the torque converter. | 03-29-2012 |
20130161146 | TWO STAGE PISTON FOR FASTER CLUTCH APPLY - A clutch assembly, including: a secondary piston assembly; a primary piston including a portion located radially outward of the secondary piston assembly; a first chamber at least partially formed by a first side of the primary piston; a second chamber at least partially formed by the secondary piston assembly and a second side of the primary piston; and a check valve connecting the first and second chambers. For a first force applied by fluid in the first chamber: the primary piston remains axially stationary; the fluid flows from the first chamber into the second chamber; and the secondary piston assembly displaces in a first axial direction to contact a clutch pack. For an increase of the first force to a second force: fluid flow between the first and second chambers is blocked by the check valve; and the primary piston and the secondary piston assembly displace in the first axial direction to close the clutch pack. | 06-27-2013 |
20140178192 | STATOR HOUSING AND METHOD THEREOF - A method for fabricating a stator including positioning a cutting device, with a diameter equal to a desired pocket diameter, with respect to pockets in a side of a housing. Each pocket has an end wall with an indentation. The method axially displaces the device to remove material from side and end walls for the pockets to form desired diameters and lengths for the pockets, while leaving a portion of the respective indentation in place. The housing includes a plurality of blades. Each pocket is arranged to receive an engagement assembly for a one-way clutch. Each pocket includes a first opening facing in a second axial direction and a second opening in communication with the first opening and at least partially facing in a circumferential direction. The first side faces the second axial direction and the side walls are in communication with the first and second openings. | 06-26-2014 |
20140197002 | SYMMETRICAL STRUT FOR ROCKER ONE-WAY CLUTCH - A one-way clutch, including: an outer race including a pocket and a strut. The strut includes a body and a retention segment. The body is at least partially locatable in the pocket. The retention segment includes a neck portion and a spring retention portion. The neck portion is directly connected to the body and extends from the body in a first direction. The spring retention portion extends from the neck portion in the first direction and includes first and second segments extending in second and third opposite directions, orthogonal to the first direction, from the neck portion. | 07-17-2014 |
20140326566 | ONE-WAY CLUTCH WITH CONICAL STRUT - A one-way clutch, including: a housing including a top side and a plurality of indentations in the housing, each indentation including: a respective opening in a portion of the top side; a respective bottom wall opposite the respective opening in an axial direction parallel to an axis of rotation for the one-way clutch; and a respective side wall. The respective side wall: | 11-06-2014 |
20150021137 | TWO PASS MULTI-FUNCTION TORQUE CONVERTER - A torque converter, including: a cover; an impeller including an impeller blade, and an impeller shell with a first surface extending beyond the impeller blade in a radial direction and at an acute angle with respect to a first line in the radial direction; a turbine including a turbine blade, and a turbine shell with a second surface axially aligned with the first surface and at the acute angle with respect to the first line; a turbine clutch including the first and second surfaces and friction material disposed between the first and second surfaces; a torus at least partially enclosed by the impeller and turbine shells; and a pressure chamber at least partially formed by the turbine shell and the cover. For torque converter mode, the turbine and the impeller are independently rotatably with respect to each other. For lock-up mode, the first and second surfaces are non-rotatably connected. | 01-22-2015 |
20150068856 | METHOD OF CONTROLLING CLUTCHES IN A MULTI-FUNCTION TORQUE CONVERTER - A method of controlling a multi-function torque converter including a cover, an impeller shell, a turbine shell, a first pressure chamber at least partially formed by the turbine shell and the cover; a second pressure chamber at least partially formed by the impeller and turbine shells, and a third pressure chamber at least partially formed by the impeller shell and the cover, an impeller clutch including a portion of the impeller shell, and a turbine clutch including a portion of the turbine shell, the method including: pressurizing the first pressure chamber to substantially a first fluid pressure level or to a second fluid pressure level greater than the first level; pressurizing the second pressure chamber to a third fluid pressure level greater than the first and second levels; passively draining the third pressure chamber to be substantially at the first level; and connecting the impeller shell to the cover. | 03-12-2015 |
20150068857 | BEARING-LESS TORQUE CONVERTER - A torque converter, including: a cover; an impeller shell; a turbine shell; a turbine clutch formed by the turbine and impeller shells; and a stator formed of a single piece of material and including a protrusion extending in an axial direction and having a radial surface. In a drive mode : the cover transmits torque to the impeller shell; the turbine clutch is open; the radial surface forms an entirety of a portion of the stator closest, in the axial direction from the stator toward the turbine shell, to the turbine shell; and the radial surface is free of contact with the turbine shell. In a coast mode for the torque converter, at least a portion of the radial surface is in contact with the turbine shell or is separated from the turbine shell by a layer of fluid in contact with the radial surface and the turbine shell. | 03-12-2015 |
Patent application number | Description | Published |
20120177553 | Injector And Method For Reducing Nox Emissions From Boilers, IC Engines and Combustion Processes - A system and method of reducing NOx emissions from a lean burn combustion source is provided. The system includes at least one injection lance having a elongated shaft with distal and proximal ends, a metering valve positioned at the distal end, an atomization chamber positioned between the metering valve and the distal end, a storage chamber for containing a reagent fluidly connected to the metering valve, an injection tip positioned at the proximal end for delivering the reagent, and at least one air port for supplying air to the atomization chamber. The injection lance is positioned in the combustion source, and the reagent is supplied from the storage chamber to the injection lance at an inlet pressure. The reagent is then injected into the combustion source via the injection lance, wherein a temperature of the reagent prior to the injection is maintained below a hydrolysis temperature of the reagent. | 07-12-2012 |
20130152470 | INJECTOR AND METHOD FOR REDUCING NOX EMISSIONS FROM BOILERS, IC ENGINES AND COMBUSTION PROCESSES - A system and method of reducing NOx emissions from a lean burn combustion source is provided. The system includes at least one injection lance having a elongated shaft with distal and proximal ends, a metering valve positioned at the distal end, an atomization chamber positioned between the metering valve and the distal end, a storage chamber for containing a reagent fluidly connected to the metering valve, an injection tip positioned at the proximal end for delivering the reagent, and at least one air port for supplying air to the atomization chamber. The injection lance is positioned in the combustion source, and the reagent is supplied from the storage chamber to the injection lance at an inlet pressure. The reagent is then injected into the combustion source via the injection lance, wherein a temperature of the reagent prior to the injection is maintained below a hydrolysis temperature of the reagent. | 06-20-2013 |
20130272940 | On Demand Generation of Ammonia for Small Industrial and Commercial Boilers - A system and method for reducing NOx emissions from a lean burn combustion source is provided. The system includes a blower passing air through a continuous duct having a hot portion and a reaction portion. The hot portion of the duct is positioned in the convective zone of the combustion source to heat the passing air for the reaction portion of the duct. An injector attached to a urea storage container is positioned in the reaction portion of the duct and sprays urea from the storage container into the heated air in the reaction duct for evaporation and decomposition into ammonia gas. The ammonia gas is then supplied to an injection grid in the exhaust duct of the lean burn combustion source upstream of a NOx reduction catalyst. The injection grid supplies the ammonia gas to the exhaust gas in the exhaust duct. | 10-17-2013 |
20140099248 | Method for Urea Decomposition and Ammonia Feed to a Selective Catalytic Reduction System - A method of reducing NOx emissions from a lean burn combustion source employs an aqueous solution of reagent that is injected into a continuous decomposition duct at a rate of 0.2-10 gph with a flowing side stream of hot gas at a rate of 150-3000 scfm and a temperature of greater than 700° F. in the decomposition duct such that the aqueous reagent is converted to ammonia gas that is conveyed by the continuous decomposition duct to an ammonia injection grid that is placed in a primary exhaust stream from the combustion source upstream of a NOx reducing catalyst and NOx is reduced. | 04-10-2014 |
20140134061 | Urea Decomposition And Improved Scr Nox Reduction On Industrial And Small Utility Boilers - A lean burn combustion source includes a first side stream comprising an inlet and an outlet, both positioned downstream of a furnace and upstream of a particulate control device, and a second side stream comprising: an inlet positioned downstream of the particulate control device and upstream of the catalyst, a heat exchanger section passing through the first side stream, whereby heat from hot exhaust gas flowing through the first side stream is transferred to hot exhaust gas flowing through the second side stream, an injector positioned in the second side stream injecting aqueous based reagent into the hot exhaust gas flowing through the second side stream such that the aqueous based reagent decomposes to ammonia gas, and an outlet in fluid communication with a reagent distribution device positioned in the primary exhaust gas stream downstream of the particulate control device and upstream of the catalyst. | 05-15-2014 |
20140360168 | System and Method for Sequential Injection of Reagent to Reduce NOx from Combustion Sources - In a large exhaust duct from a lean burn combustion source, such as a boiler, diesel engine or gas turbine, multiple injectors can be used to inject a reagent, such as an aqueous solution of urea or ammonia, into the exhaust for use in the catalytic reduction of NOx in a process known in the art as selective catalytic reduction (SCR). When operating at low injection rates, such as during low combustor loads, the injectors are operated individually for short periods of time in a sequential manner. | 12-11-2014 |
20150093315 | Tunable AIG for Improved SCR Performance - A system for controlling reagent flow to an exhaust of a lean burn combustion source includes a plurality of decomposition ducts each being connected to at least one injection lance of a reagent injection grid and supplying reagent and hot carrier gas to the injection lance, and at least one metering valve in communication with each of the plurality of decomposition ducts that controls reagent injection rate to the injection lance. A method of controlling a reagent flow to an exhaust of a lean burn combustion source includes providing a reagent injection grid having at least one injection lance, supplying the reagent and hot carrier gas to the reagent injection grid from a plurality of decomposition ducts coupled to the injection grid, and controlling reagent injection rate to the injection grid via at least one metering valve in communication with each of the plurality of decomposition ducts. | 04-02-2015 |