# US 10,118,621 B2 · Method and system for control of temperature of an exhaust aftertreatment system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,118,621 B2 - Document ID: US10118621B2 - Status: Granted - Kind: B2 - Application number: 15/110,071 - Filed: 2015-01-13 - Published: 2016-11-17 - Granted: 2018-11-06 - Earliest claimed: 2014-01-15 - Assignees: Scania CV AB - Applicants: Scania Cv AB - Inventors: Fredrik Roos; Elvedin Ramic - Web page: https://patentgrep.com/patent/US10118621B2 ## CPC - B60W 30/18136: {Engine braking} - B60W 10/06: including control of combustion engines - B60W 10/11: Stepped gearings - B60W 10/184: with wheel brakes - B60W 10/196: acting within the driveline, e.g. retarders - B60W 10/198: with exhaust brakes - F01N 11/002: {the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus} - B60W 2050/0094: {of control units} - B60W 2510/068: Engine exhaust temperature - B60W 2710/0694: Engine exhaust temperature - B60W 2710/10: Change speed gearings - B60W 2710/1005: Transmission ratio engaged - B60W 2710/18: Braking system - Y02T 10/40: Engine management systems - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - 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 present invention provides a method and system arranged for control of at least one temperature Texhaust for an exhaust treatment system in a vehicle. The system comprises a first determination unit arranged for the determination of the at least one temperature Texhaust for the exhaust treatment system. The system also comprises a second determination unit arranged for the determination of an order of priority for the use of brakes in the vehicle. These brakes comprise at least the service brakes and the auxiliary brakes, the auxiliary brakes in turn comprising at least one engine fitted auxiliary brake, which is fitted in connection with an exhaust stream through the exhaust treatment system. The order of priority is determined based on the at least one temperature Texhaust. The system also comprises an utilization unit arranged for the use of the determined order of priority at braking of the vehicle. ## Claims ### Claim 1 A method for control of at least one temperature Texhaust for an exhaust treatment system in a vehicle said method comprising: determining at least one temperature Texhaust for said exhaust treatment system; determining an order of priority for the use of brakes in said vehicle, wherein said brakes comprise at least service brakes and auxiliary brakes, wherein said auxiliary brakes comprise at least one engine fitted auxiliary brake, which is fitted in connection to an exhaust stream through said exhaust treatment system, and wherein said order of priority is determined based on said at least one temperature Texhaust for said exhaust treatment system; and determining said order of priority at braking of said vehicle. ### Claim 2 (depends on 1) The method according to claim 1, wherein said order of priority is determined in such a way that said at least one engine fitted auxiliary brake is prioritized over other said brakes, if said at least one temperature Texhaust for said exhaust treatment system is below a minimum temperature threshold value Tmin. ### Claim 3 (depends on 1) The method according to claim 1, wherein said order of priority is determined in such a way that said at least one engine fitted auxiliary brake is prioritized lower than the other said brakes, if said at least one temperature Texhaust for said exhaust treatment system is higher than a maximum temperature threshold value Tmax. ### Claim 4 (depends on 1) The method according to claim 1, wherein said order of priority indicates that an auxiliary brake with higher priority is used before another of said brakes with lower priority. ### Claim 5 (depends on 1) The method according to claim 1, wherein said method comprises: determining a suitable flow through said exhaust treatment system, based on said at least one temperature Texhaust for said exhaust treatment system; and performing a gear selection in a gearbox in said vehicle during said braking, wherein said gear selection is carried out based on said suitable flow. ### Claim 6 (depends on 5) The method according to claim 5, wherein a higher used gear in said gearbox provides a lower flow through said exhaust treatment system, than does a lower used gear in said gearbox. ### Claim 7 (depends on 5) The method according to claim 5, wherein the determined order of priority of use of said brakes and the performance of said gear selection are used to control said at least one temperature Texhaust for said exhaust treatment system. ### Claim 8 (depends on 1) The method according to claim 1, wherein said control of said at least one temperature Texhaust for an exhaust treatment system achieves a reduction of said at least one temperature Texhaust by prioritizing said at least one engine fitted auxiliary brake lower than the other said brakes, if said at least one temperature Texhaust for said exhaust treatment system is higher than a first maximum temperature threshold value Tmax_same gear. ### Claim 9 (depends on 8) The method according to claim 8, wherein said reduction of said at least one temperature Texhaust is a relative decrease, which constitutes a decrease compared to if said control of said at least one temperature Texhaust for an exhaust treatment system would have been deactivated. ### Claim 10 (depends on 1) The method according to claim 1, wherein said control of said at least one temperature Texhaust for an exhaust treatment system achieves a decrease of said at least one temperature Texhaust, since said at least one engine fitted auxiliary brake is prioritized lower than the other said brakes, and since an up-shift is carried out in a gearbox in said vehicle, if said at least one temperature Texhaust for said exhaust treatment system is higher than a second maximum temperature threshold value Tmax_up_gear. ### Claim 11 (depends on 1) The method according to claim 1, wherein said control of said at least one temperature Texhaust for an exhaust treatment system achieves a reduction of said at least one temperature Texhaust by prioritizing said at least one engine fitted auxiliary brake lower than the other said brakes, and by carrying out a down-shift in a gearbox in said vehicle, if said at least one temperature Texhaust for said exhaust treatment system is higher than a third maximum temperature threshold value Tmax_down_gear. ### Claim 12 (depends on 1) The method according to claim 1, wherein said control of said at least one temperature Texhaust for an exhaust treatment system achieves an increase of said at least one temperature Texhaust by prioritizing said at least one engine fitted auxiliary brake higher than the other said brakes, if said at least one temperature Texhaust for said exhaust treatment system is lower than a first minimum temperature threshold value Tmin_same gear. ### Claim 13 (depends on 12) The method according to claim 12, wherein said increase of said at least one temperature Texhaust is a relative increase, which constitutes an increase compared to if said control of said at least one temperature Texhaust for an exhaust treatment system had been deactivated. ### Claim 14 (depends on 1) The method according to claim 1, wherein said control of said at least one temperature Texhaust for an exhaust treatment system achieves an increase of said at least one temperature Texhaust by prioritizing said at least one engine fitted auxiliary brake higher than the other said brakes, and by carrying out an up-shift in a gearbox in said vehicle, if said at least one temperature Texhaust for said exhaust treatment system is lower than a second minimum temperature threshold value Tmin up gear. ### Claim 15 (depends on 1) The method according to claim 1, wherein said control of said at least one temperature Texhaust for an exhaust treatment system achieves an increase of said at least one temperature Texhaust by prioritizing said at least one engine fitted auxiliary brake higher than the other said brakes, and by carrying out a down-shift in a gearbox in said vehicle, if said at least one temperature Texhaust for said exhaust treatment system is lower than a third minimum temperature threshold value Tmin down gear. ### Claim 16 (depends on 1) The method according to claim 1, wherein said use of said engine fitted auxiliary brake during said braking increases said at least one temperature Texhaust, by way of heating of said exhaust treatment system. ### Claim 17 (depends on 1) The method according to claim 1, wherein said braking of said vehicle comprises an active use by a driver and/or a control system of one or several of: a wheel brake; and an auxiliary brake. ### Claim 18 (depends on 17) The method according to claim 17, wherein said auxiliary brake comprises one or several from among the group: a retarder; said engine fitted auxiliary brake; and an electromagnetic brake. ### Claim 19 (depends on 1) The method according to claim 1, wherein said engine fitted auxiliary brake comprises one or several of: an exhaust brake; and a decompression brake. ### Claim 20 (depends on 1) The method according to claim 1, wherein said determination of said at least one temperature Texhaust is carried out based on at least one estimation of a temperature Texhaust _measure for said exhaust treatment system. ### Claim 21 (depends on 1) The method according to claim 1, wherein said determination of said at least one temperature Texhaust is carried out, based on at least one measurement of a temperature Texhaust _measure for said exhaust treatment system. ### Claim 22 (depends on 1) The method according to claim 1, wherein use said at least one engine fitted auxiliary brake is carried out only if such use results in said exhaust stream obtaining a favorable exhaust flow and/or a favorable exhaust flow temperature Texhaust _stream for said at least one temperature Texhaust. ### Claim 23 (depends on 1) The method according to claim 1, wherein said control of at least one temperature Texhaustfor an exhaust treatment system is carried out only in such a way that a total provided braking force achieved by said brakes in said vehicle is below a requested total braking force. ### Claim 24 (depends on 23) The method according to claim 23, wherein measures comprised in said control of at least one temperature Texhaust for an exhaust treatment system, resulting in said total provided braking force exceeding said requested total braking force, are disqualified at said control. ### Claim 25 A computer program product for control of at least one temperature Texhaust for an exhaust treatment system in a vehicle, wherein the computer program product is stored in a non-transitory computer-readable medium and comprises computer-readable program code portions embodied therein, the computer-readable program code portions configured to cause an electronic processor to: determine at least one temperature Texhaust for said exhaust treatment system; determine an order of priority for the use of brakes in said vehicle, wherein said brakes comprise at least service brakes and auxiliary brakes, wherein said auxiliary brakes comprise at least one engine fitted auxiliary brake, which is fitted in connection to an exhaust stream through said exhaust treatment system, and wherein said order of priority is determined based on said at least one temperature Texhaust for said exhaust treatment system; and determine said order of priority at braking of said vehicle. ### Claim 26 A system arranged for control of at least one temperature Texhaust for an exhaust treatment system in a vehicle, said system comprising: a first determination unit arranged for the determination of said at least one temperature Texhaustfor said exhaust treatment system a second determination unit arranged for the determination of an order of priority for the use of brakes in said vehicle, wherein said brakes comprise at least service brakes and auxiliary brakes, wherein said auxiliary brakes comprise at least one engine fitted auxiliary brake, which is fitted in connection to an exhaust stream through said exhaust treatment system, and wherein said order of priority is determined based on said at least one temperature Texhaust for said exhaust treatment system; and a utilization unit arranged for use of said order of priority at braking of said vehicle.