# US 8,464,966 B2 · Delivery module for selective catalytic reduction > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,464,966 B2 - Document ID: US8464966B2 - Status: Granted - Kind: B2 - Application number: 12/521,385 - Filed: 2007-11-15 - Published: 2011-01-27 - Granted: 2013-06-18 - Earliest claimed: 2006-12-28 - Assignees: Robert Bosch GmbH - Applicants: Rainer Haeberer; Matthias Horn - Inventors: Rainer Haeberer; Matthias Horn - Web page: https://patentgrep.com/patent/US8464966B2 ## CPC - F01N 3/2066: {Selective catalytic reduction [SCR]} - F01N 2240/16: an electric heater, i.e. a resistance heater - F01N 2610/02: the substance being ammonia or urea - F01N 2610/10: the substance being heated, e.g. by heating tank or supply line of the added substance - F01N 2610/14: Arrangements for the supply of substances, e.g. conduits - F01N 2610/1433: Pumps - 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) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The invention relates to a delivery module for a dosage system used to introduce a reducing agent into the exhaust gas tract of an internal combustion engine. The delivery module has a housing, which accommodates various components, and which is produced as an injection moulded component. A heating system is integrated in the vicinity of the center of the housing. The housing has at least one chamber for receiving additional components. ## Claims ### Claim 1 A delivery module for a metering system for introducing a reducing agent into an exhaust system of an internal combustion engine, comprising a housing having first, second and third chambers in which components are accommodated, the housing being manufactured as an injection-molded component, said housing further having a reversing valve, the first chamber including an electric drive mechanism and a pump, the second chamber including a heater, and the third chamber including an actuation magnet that actuates the reversing valve. ### Claim 2 (depends on 1) The delivery module as defined by claim 1, wherein the housing is produced as an injection-molded component by a plastic injection molding process or by an aluminum injection molding process. ### Claim 3 (depends on 1) The delivery module as defined by claim 1, wherein the heater is either disposed in the housing in a position that promotes heat conduction and heat radiation or is disposed near the center of the housing. ### Claim 4 (depends on 2) The delivery module as defined by claim 2, wherein the heater is either disposed in the housing in a position that promotes heat conduction and heat radiation or is disposed near the center of the housing. ### Claim 5 (depends on 1) The delivery module as defined by claim 1, wherein components to be contacted electrically are mounted in their corresponding chambers in the housing each have plug prongs passing through respective housing openings. ### Claim 6 (depends on 2) The delivery module as defined by claim 2, wherein components to be contacted electrically are mounted in their corresponding chambers in the housing each have plug prongs passing through respective housing openings. ### Claim 7 (depends on 3) The delivery module as defined by claim 3, wherein components to be contacted electrically are mounted in their corresponding chambers in the housing each have plug prongs passing through respective housing openings. ### Claim 8 (depends on 1) The delivery module as defined by claim 1, further comprising an actuating device extending between the actuating magnet in said third chamber and said reversing valve in said first chamber. ### Claim 9 (depends on 5) The delivery module as defined by claim 5, further comprising an actuating device extending between the actuating magnet in said third chamber and said reversing valve in said first chamber. ### Claim 10 (depends on 1) The delivery module as defined by claim 1, wherein at least one inner wall extends inside the housing, separating at least said second and third chambers from one another and promoting heat transfer by heat conduction between said second and third chambers. ### Claim 11 (depends on 8) The delivery module as defined by claim 8, wherein at least one inner wall extends inside the housing, separating at least said second and third chambers from one another and promoting heat transfer by heat conduction between said second and third chambers. ### Claim 12 (depends on 1) The delivery module as defined by claim 1, wherein at least said first chamber is closable by a lid element, which lid element is either clipped, screwed, or mounted in material-locking fashion to the at least said first chamber at an access opening. ### Claim 13 (depends on 2) The delivery module as defined by claim 2, wherein at least said first chamber is closable by a lid element, which lid element is either clipped, screwed, or mounted in material-locking fashion to the at least said first chamber at an access opening. ### Claim 14 (depends on 1) The delivery module as defined by claim 1, wherein the housing has both an inlet and at least one return for reducing agent to be introduced into the exhaust system of the engine. ### Claim 15 (depends on 1) The delivery module as defined by claim 1, wherein said reversing valve as comprises a 4/2-way valve.