# US 10,371,030 B2 · Diesel exhaust fluid system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,030 B2 - Document ID: US10371030B2 - Status: Granted - Kind: B2 - Application number: 15/282,436 - Filed: 2016-09-30 - Published: 2018-04-05 - Granted: 2019-08-06 - Earliest claimed: 2016-09-30 - Assignees: Deere & Company - Applicants: Deere & Company - Inventors: Ryan Kruse; Francis J. Lahey; Mark D. Benedict; Douglas J. Send; Paul Wantschik; Eric Nohr; Paul Riffel; Jonathan Copeland - Web page: https://patentgrep.com/patent/US10371030B2 ## CPC - F01N 3/206: {Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents} - B01D 53/9431: {Processes characterised by a specific device} - B01D 53/9495: {Controlling the catalytic process} - F01N 3/2066: {Selective catalytic reduction [SCR]} - F01N 2560/12: Other sensor principles, e.g. using electro conductivity of substrate or radio frequency - F01N 2610/10: the substance being heated, e.g. by heating tank or supply line of the added substance - F01N 2610/1406: Storage means for substances, e.g. tanks or reservoirs - F01N 2610/1433: Pumps - F01N 2610/1473: Overflow or return means for the substances, e.g. conduits or valves for the return path - F01N 2610/148: Arrangement of sensors - F01N 2900/1814: Tank level - F01N 2900/1818: Concentration of the reducing agent - Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters - Y02T 10/12: Improving ICE efficiencies - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An exhaust gas purification system includes a tank for storing a fluid and a mounting plate coupled to the tank. A baffle is positioned inside the tank below the mounting plate. The baffle has an outer wall defining an interior cavity and an opening. A sensor is positioned in the interior cavity for detecting a condition of the fluid. A supply conduit extends through the mounting plate into the tank. A return conduit extends through the mounting plate into the tank and has an outlet positioned to discharge a return fluid below the opening and exterior to the baffle and the interior cavity. ## Claims ### Claim 1 An exhaust gas purification system comprising: a tank for storing a fluid; a baffle positioned inside the tank, the baffle having an outer wall defining an interior cavity and an upper opening; a sensor positioned within the interior cavity for detecting a condition of the fluid; a supply conduit extending into the tank; and a return conduit extending into the tank and having an outlet positioned to discharge the fluid below the upper opening and away from the interior cavity, wherein the return conduit extends through the upper opening and through the outer wall of the baffle. ### Claim 2 (depends on 1) The exhaust gas purification system of claim 1, wherein the return conduit includes a first section positioned in the tank and a second section extending at an angle relative to the first section and through the outer wall of the baffle. ### Claim 3 (depends on 1) The exhaust gas purification system of claim 1, wherein the supply conduit extends into the interior cavity of the baffle. ### Claim 4 (depends on 1) The exhaust gas purification system of claim 1, wherein the baffle includes a fabric material. ### Claim 5 (depends on 1) The exhaust gas purification system of claim 1, wherein the sensor is configured to detect the concentration of the fluid. ### Claim 6 (depends on 1) The exhaust gas purification system of claim 1, further comprising a heater component positioned at least partially inside of the interior cavity of the baffle. ### Claim 7 An exhaust gas purification system comprising: a tank for storing a fluid; a mounting plate coupled to the tank; a baffle positioned inside the tank below the mounting plate, the baffle having an outer wall defining an interior cavity and an opening; a sensor positioned in the interior cavity for detecting a condition of the fluid; a supply conduit extending through the mounting plate into the tank; and a return conduit extending through the mounting plate into the tank and having an outlet positioned to discharge the fluid below the opening and exterior to the baffle. ### Claim 8 (depends on 7) The exhaust gas purification system of claim 7, wherein the return conduit extends through the opening and through the outer wall of the baffle. ### Claim 9 (depends on 8) The exhaust gas purification system of claim 8, wherein the baffle includes an upper portion and a lower portion, and wherein the return conduit extends through the upper portion of the baffle. ### Claim 10 (depends on 7) The exhaust gas purification system of claim 7, further comprising a level sensor positioned within the interior cavity of the baffle. ### Claim 11 (depends on 7) The exhaust gas purification system of claim 7, further comprising a heating coil positioned in the interior cavity of the baffle and having an inlet and an outlet extending through the mounting plate. ### Claim 12 (depends on 7) The exhaust gas purification system of claim 7, wherein the sensor is configured to detect the concentration of the fluid using a piezoelectric device. ### Claim 13 (depends on 7) The exhaust gas purification system of claim 7, wherein the baffle includes a porous material. ### Claim 14 An exhaust gas purification system comprising: an injector for introducing a fluid into an exhaust stream; a supply device to supply the fluid to the injector; a tank for storing the fluid; a baffle positioned inside the tank, the baffle having an outer wall defining an interior cavity and an opening; a sensor positioned in the interior cavity for detecting a condition of the fluid; a supply conduit extending into the tank to supply the fluid from the tank to the supply device; and a return conduit extending into the tank to return the fluid from the supply device to the tank, the return conduit extending through the opening and through the outer wall of the baffle and having an outlet positioned to discharge the fluid outside of the baffle. ### Claim 15 (depends on 14) The exhaust gas purification system of claim 14, wherein the baffle includes an upper portion having a first diameter and a lower portion having a second diameter larger than the first diameter, and wherein the return conduit extends through the upper portion of the baffle. ### Claim 16 (depends on 14) The exhaust gas purification system of claim 14, further comprising a heating coil positioned in the interior cavity of the baffle and a level sensor positioned in the interior cavity of the baffle. ### Claim 17 (depends on 14) The exhaust gas purification system of claim 14, wherein the sensor is configured to detect the concentration of the fluid using a piezoelectric device. ### Claim 18 (depends on 14) The exhaust gas purification system of claim 14, wherein the baffle includes a non-woven fabric material having an opening for receiving the return conduit. ### Claim 19 (depends on 14) The exhaust gas purification system of claim 14, wherein the injector, supply device, and tank are positioned on an industrial vehicle.