# US 10,766,044 B2 · Channeled reductant mixing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,044 B2 - Document ID: US10766044B2 - Status: Granted - Kind: B2 - Application number: 16/198,045 - Filed: 2018-11-21 - Published: 2020-05-21 - Granted: 2020-09-08 - Earliest claimed: 2018-11-21 - Assignees: Caterpillar Inc. - Applicants: Yong Yi; Samprati Vijay Shah; Ian Aguirre; Yung T. Bui; Arvind Jujare; Erin Reim; Anthony C. Rodman - Inventors: Yong Yi; Samprati Vijay Shah; Ian Aguirre; Yung T. Bui; Arvind Jujare; Erin Reim; Anthony C. Rodman - Web page: https://patentgrep.com/patent/US10766044B2 ## CPC - B05B 7/0466: {with means for deflecting the central liquid flow towards the peripheral gas flow} - B05B 11/06: Gas or vapour producing the flow, e.g. from a compressible bulb or air pump - B05B 1/02: designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, {or having an outlet of particular shape}(B05B1/26, B05B1/28, B05B1/34 take precedence) - B05B 3/00: Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements - B05B 5/00: Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means - Y02T 10/12: Improving ICE efficiencies - B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A reductant impingement device includes a proximal end having an impingement pin with a convex surface; and a distal end having a body concentric with a longitudinal axis of the impingement pin. The distal end includes a first surface and a second surface opposite the first surface. A plurality of inner channels connects the first surface and the second surface, and a plurality of outer channels connects the first surface and the second surface, where the plurality of inner channels are disposed in a circular array at a first radial distance from a longitudinal axis of the impingement pin, and the plurality of outer channels are disposed in a circular array at a second distance from the longitudinal axis of the impingement pin. ## Claims ### Claim 1 A nozzle, comprising: a nozzle body comprising: a proximal end defining a first inlet and a second inlet that is distinct from the first inlet, an axis of the first inlet being disposed parallel to a longitudinal axis of the nozzle, an axis of the second inlet being disposed at an angle perpendicular to the longitudinal axis of the nozzle; a distal end disposed opposite the proximal end along the longitudinal axis of the nozzle, the distal end comprising an outlet defining a plurality of outlet orifices therethrough; and an interior disposed between the proximal end and the distal end, the interior including: a fluid impingement chamber fluidly connected with the first inlet and the second inlet, and a mixing chamber; and an impingement device disposed within the interior of the nozzle body, the impingement device including an impingement pin and an impingement device body extending radially outward from the impingement pin along a radial direction, the radial direction being transverse to the longitudinal axis of the nozzle, the impingement device body defining a plurality of impingement body orifices therethrough, the mixing chamber being fluidly coupled to the fluid impingement chamber via the plurality of impingement body orifices, the impingement pin extending away from the impingement device body along the longitudinal axis of the nozzle, the impingement pin including a convex surface disposed at an end of the impingement pin, wherein the convex surface is concentric with the longitudinal axis of the nozzle, the plurality of outlet orifices being fluidly coupled with the plurality of impingement body orifices via the mixing chamber. ### Claim 2 (depends on 1) The nozzle of claim 1, wherein the first inlet is a reductant fluid inlet and the second inlet is a compressed air inlet. ### Claim 3 (depends on 1) The nozzle of claim 1, wherein the convex surface is hemispherical, and wherein the convex surface is arranged to impinge directly against a flow of a fluid passing through the first inlet. ### Claim 4 (depends on 1) The nozzle of claim 1, wherein the impingement device body has a first surface and a second surface facing away from the first surface, wherein one or more of the first surface and the second surface forms a fluid seal through contact with the interior of the nozzle body, and wherein each orifice of the plurality of impingement body orifices extends from the first surface to the second surface. ### Claim 5 (depends on 1) The nozzle of claim 1, wherein the axis of the second inlet is perpendicular to an outer surface of the impingement pin and perpendicular to the longitudinal axis of the nozzle. ### Claim 6 (depends on 5) The nozzle of claim 5, wherein the proximal end of the nozzle body defines a first air inlet channel and a second air inlet channel, the second inlet being the first air inlet channel, and wherein an axis of the second air inlet channel is perpendicular to the outer surface of the impingement pin and perpendicular to the longitudinal axis of the nozzle. ### Claim 7 (depends on 1) The nozzle of claim 1, wherein each orifice of the plurality of impingement body orifices is disposed circumferentially about the longitudinal axis of the nozzle. ### Claim 8 (depends on 7) The nozzle of claim 7, wherein each orifice of the plurality of impingement body orifices is spaced equally from an adjacent orifice of the plurality of impingement body orifices about a circumferential direction, the circumferential direction extending about the longitudinal axis of the nozzle. ### Claim 9 (depends on 8) The nozzle of claim 8, wherein the plurality of impingement body orifices includes a first plurality of impingement orifices and a second plurality of impingement orifices, an axis of each orifice of the first plurality of impingement orifices forming a first angle with respect to a first surface of the impingement device, an axis of each orifice of the second plurality of impingement orifices forming a second angle with respect to the first surface of the impingement device, the first angle being different from the second angle. ### Claim 10 An impingement device, comprising: an impingement pin and a device body, the device body being coaxial with a longitudinal axis of the impingement pin, and being disposed at a distal end of the impingement device, wherein the impingement pin comprises a convex surface disposed at a proximal end of the impingement device, and wherein the device body comprises: a first surface; a second surface opposite the first surface; a plurality of inner channels connecting the first surface and the second surface, the plurality of inner channels being disposed in a first circular array at a first radial distance from the longitudinal axis of the impingement pin; and a plurality of outer channels connecting the first surface and the second surface, the plurality of outer channels being disposed in a second circular array at a second radial distance from the longitudinal axis of the impingement device, the first radial distance being less than the second radial distance. ### Claim 11 (depends on 10) The impingement device of claim 10, further comprising a plurality of slits forming the plurality of inner channels connecting the first surface and the second surface. ### Claim 12 (depends on 11) The impingement device of claim 11, wherein a first inner channel of the plurality of inner channels comprises two opposing inner channel walls, wherein the two opposing inner channel walls comprise a first inner channel wall disposed parallel to a second inner channel wall, and wherein the first inner channel wall and the second inner channel wall are disposed at a first predetermined angle respective to the longitudinal axis of the impingement pin. ### Claim 13 (depends on 11) The impingement device of claim 11, wherein a first outer channel of the plurality of outer channels comprises two opposing outer channel walls, wherein the two opposing outer channel walls comprise a first outer channel wall disposed parallel to a second outer channel wall, and wherein the first outer channel wall and the second outer channel wall are disposed at a second predetermined angle respective to the longitudinal axis of the impingement pin. ### Claim 14 (depends on 11) The impingement device of claim 11, wherein the convex surface is hemispherical and disposed at a terminal end of the impingement pin, wherein the convex surface is configured to impinge a fluid flow of a fluid. ### Claim 15 An exhaust system, comprising: an exhaust pipe configured to receive exhaust from an engine; a compressed air source; a reductant source; and a nozzle fluidly connected with the exhaust pipe, the nozzle being configured to receive compressed air from the compressed air source and reductant from the reductant source, the nozzle having a nozzle body and an impingement device disposed within the nozzle body, the nozzle body comprising: a proximal end defining a first inlet and a second inlet that is distinct from the first inlet, an axis of the first inlet being disposed parallel to a longitudinal axis of the nozzle, an axis of the second inlet being disposed at an angle perpendicular to the longitudinal axis of the nozzle; a distal end disposed opposite the proximal end along the longitudinal axis of the nozzle, the distal end comprising an outlet defining a plurality of outlet orifices therethrough; and an interior disposed between the proximal end and the distal end, the interior including: a fluid impingement chamber fluidly connected with the first inlet and the second inlet, and a mixing chamber, the impingement device comprising an impingement pin and an impingement device body extending radially outward from the impingement pin along a radial direction, the radial direction being transverse to the longitudinal axis of the nozzle, the impingement device body defining a plurality of impingement body orifices therethrough, the mixing chamber being fluidly coupled to the fluid impingement chamber via the plurality of impingement body orifices, the impingement pin extending away from the impingement device body along the longitudinal axis of the nozzle, the impingement pin including a convex surface disposed at an end of the impingement pin, wherein the convex surface is concentric with the longitudinal axis of the nozzle the plurality of outlet orifices being fluidly coupled with the plurality of impingement body orifices via the mixing chamber. ### Claim 16 (depends on 15) The exhaust system of claim 15, wherein the first inlet is a reductant fluid inlet and the second inlet is a compressed air inlet. ### Claim 17 (depends on 15) The exhaust system of claim 15, wherein the convex surface is hemispherical, and wherein the convex surface is arranged to impinge directly against a flow of a fluid passing through the first inlet. ### Claim 18 (depends on 15) The exhaust system of claim 15, wherein the impingement device body has a first surface and a second surface facing away from the first surface, wherein one or more of the first surface and the second surface forms a fluid seal through contact with the interior of the nozzle body, and wherein each orifice of the plurality of impingement body orifices extends from the first surface to the second surface. ### Claim 19 (depends on 15) The exhaust system of claim 15, wherein the axis of the second inlet is perpendicular to an outer surface of the impingement pin and perpendicular to the longitudinal axis of the nozzle. ### Claim 20 (depends on 19) The exhaust system of claim 19, wherein the proximal end of the nozzle body defines a first air inlet channel and a second air inlet channel, the second inlet being the first air inlet channel, and wherein an axis of the second air inlet channel is perpendicular to the outer surface of the impingement pin and perpendicular to the longitudinal axis of the nozzle.