# US 11,898,481 B2 · Systems and methods for coordinated exhaust temperature control with electric heater and engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,898,481 B2 - Document ID: US11898481B2 - Status: Granted - Kind: B2 - Application number: 17/843,743 - Filed: 2022-06-17 - Published: 2022-10-06 - Granted: 2024-02-13 - Earliest claimed: 2020-03-25 - Assignees: Cummins Inc. - Applicants: Cummins Inc. - Inventors: Avra Brahma - Web page: https://patentgrep.com/patent/US11898481B2 ## CPC - F01N 3/2013: {using electric or magnetic heating means} - F01N 3/021: by means of filters - F01N 3/105: {General auxiliary catalysts, e.g. upstream or downstream of the main catalyst} - F01N 3/2066: {Selective catalytic reduction [SCR]} - F01N 9/00: Electrical control of exhaust gas treating apparatus (monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00; conjoint electrical control of two or more combustion engine functions F02D43/00) - F01N 11/002: {the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus} - F02D 41/0245: {by increasing temperature of the exhaust gas leaving the engine} - F02D 41/068: {for warming-up} - F02D 41/1446: {the characteristics being exhaust temperatures} - F02D 41/401: {Controlling injection timing (F02D41/402 takes precedence)} - F02D 41/405: {with post injections} - F01N 3/027: using electric or magnetic heating means - F01N 3/0275: {using electric discharge means} - F01N 3/103: {Oxidation catalysts for HC and CO only} - F01N 3/2006: {Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating (by electrically controlling the supply of combustible mixture or its constituents only F02D41/0235)} - F01N 3/2026: {directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect} - F01N 3/208: {Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent} - F01N 9/005: {using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly} - F01N 2240/04: an electric, e.g. electrostatic, device other than a heater - F01N 2240/16: an electric heater, i.e. a resistance heater - F01N 2550/22: of electric heaters for exhaust systems or their power supply - F01N 2560/06: the means being a temperature sensor - F01N 2900/04: Methods of control or diagnosing - F01N 2900/0416: using the state of a sensor, e.g. of an exhaust gas sensor - F01N 2900/0602: Electrical exhaust heater signals - F01N 2900/1404: Exhaust gas temperature - F01N 2900/16: said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst - F01N 2900/1602: Temperature of exhaust gas apparatus - F01N 2900/1624: Catalyst oxygen storage capacity - F01N 2900/1626: Catalyst activation temperature - F02D 2200/06: Fuel or fuel supply system parameters - F02D 2200/50: said parameters being related to the vehicle or its components - 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) - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) ## Abstract A system includes an aftertreatment system coupled to an engine, a heater, at least one sensor configured to determine an exhaust gas temperature, and a processing circuit. The processing circuit is structured to determine whether the exhaust gas temperature is at or below a predefined threshold temperature; provide a first command to control the heater in response to the exhaust gas temperature being at or below the predefined threshold temperature; selectively provide a second command to increase the exhaust gas temperature; and coordinate the first and second commands, where the first command is provided followed by the second command only if the predefined threshold temperature is not attained by the first command. ## Claims ### Claim 1 A system, comprising: an aftertreatment system coupled to an engine; a heater; at least one sensor configured to determine an exhaust gas temperature; and at least one processing circuit structured to: determine whether the exhaust gas temperature is at or below a predefined threshold temperature; provide a first command to control the heater in response to the exhaust gas temperature being at or below the predefined threshold temperature; selectively provide a second command to increase the exhaust gas temperature; and coordinate the first and second commands, wherein the first command is provided followed by the second command only if the predefined threshold temperature is not attained by the first command. ### Claim 2 (depends on 1) The system of claim 1, wherein the aftertreatment system comprises a catalyst. ### Claim 3 (depends on 2) The system of claim 2, wherein the catalyst is at least one of a selective catalytic reduction (SCR) catalyst or a diesel oxidation catalyst (DOC). ### Claim 4 (depends on 1) The system of claim 1, wherein the heater is positioned downstream of the engine and upstream of the catalyst. ### Claim 5 (depends on 1) The system of claim 1, wherein the at least one sensor includes a first sensor coupled to an inlet of the heater, a second sensor coupled to an outlet of the heater, and a third sensor coupled to an outlet of a catalyst of the aftertreatment system. ### Claim 6 (depends on 1) The system of claim 1, wherein the at least one processing circuit is further structured to coordinate the first and second commands using a multivariable model, the multivariable model comprising at least one temperature input determined by the at least one sensor, at least one predicted temperature output, a close post injection quantity parameter, a close post injection timing parameter, or a power expended to the heater. ### Claim 7 (depends on 1) The system of claim 1, wherein the at least one processing circuit is further structured to alter the first and second commands depending on at least one of a battery state or a fuel level. ### Claim 8 (depends on 1) The system of claim 1, wherein the at least one processing circuit is further structured to alter the first and second commands based on whether the exhaust gas temperature is above or below the predefined threshold temperature. ### Claim 9 (depends on 1) The system of claim 1, wherein the at least one processing circuit is further structured to modulate control of the heater as a function of the predefined threshold temperature and an actual temperature. ### Claim 10 A system, comprising: at least one controller structured to: determine whether an exhaust gas temperature is at or below a predefined threshold temperature; provide a first command to control a heater in response to the exhaust gas temperature being at or below the predefined threshold temperature; provide a second command to increase the exhaust gas temperature; and coordinate the first and second commands, wherein the first command is provided followed by the second command only if the predefined threshold temperature is not attained by the first command. ### Claim 11 (depends on 10) The system of claim 10, wherein the second command is a post injection command, wherein the post injection command is at least one of: a close post injection when the heater is positioned downstream of an engine and upstream of a diesel oxidation catalyst (DOC); or a far post injection when the heater is positioned downstream of the DOC and upstream of a selective catalytic reduction (SCR) system. ### Claim 12 (depends on 10) The system of claim 10, wherein the at least one controller is further structured to modulate control of the heater as a function of the predefined threshold temperature and an actual temperature. ### Claim 13 (depends on 10) The system of claim 10, wherein the at least one controller is further structured to coordinate the first and second commands using a multivariable model, the multivariable model comprising at least one temperature input determined by the at least one sensor, at least one predicted temperature output, a close post injection quantity parameter, a close post injection timing parameter, or a power expended to the heater. ### Claim 14 A method, comprising: determining that an exhaust gas temperature is at or below a predefined threshold temperature; and determining a sequence of commands, the sequence of commands including: providing a first command to control a heater responsive to determining that the exhaust gas temperature is at or below the predefined threshold temperature; and selectively providing a second command to increase the exhaust gas temperature. ### Claim 15 (depends on 14) The method of claim 14, further comprising modulating control of the heater as a function of the predefined threshold temperature and an actual temperature. ### Claim 16 (depends on 14) The method of claim 14, wherein determining that the exhaust gas temperature is at or below the predefined threshold temperature is responsive to receiving information indicative of the exhaust gas temperature. ### Claim 17 (depends on 14) The method of claim 14, wherein the second command is a post injection, wherein the post injection is one of: a close post injection when the heater is positioned downstream of an engine and upstream of a diesel oxidation catalyst (DOC); or a far post injection when the heater is positioned downstream of the DOC and upstream of a selective catalytic reduction (SCR) system. ### Claim 18 (depends on 17) The method of claim 17, further comprising deactivating the post injection in response to the exhaust gas temperature being at or above the predefined threshold temperature. ### Claim 19 (depends on 14) The method of claim 14, further comprising deactivating the heater in response to the exhaust gas temperature being at or above the predefined threshold temperature. ### Claim 20 (depends on 14) The method of claim 14, further comprising coordinating the first and second commands, wherein the first command is provided followed by the second command only if the predefined threshold temperature is not attained by the first command.