# US 2020/0400088 A1 · Systems and methods for controlling an engine based on aftertreatment system characteristics > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0400088 A1 - Document ID: US20200400088A1 - Status: Published application - Kind: A1 - Application number: 17/013,006 - Filed: 2020-09-04 - Published: 2020-12-24 - Earliest claimed: 2017-03-13 - Assignees: Cummins Inc. - Applicants: Cummins Inc. - Inventors: Michael Haas; Adam W. Kidd; Jeffrey David Selwyn Diwakar Abraham - Web page: https://patentgrep.com/patent/US20200400088A1 ## CPC - F02D 41/0235: {in relation with the state of the exhaust gas treating apparatus (control of exhaust gas treating apparatus per se F01N)} - F01N 3/021: by means of filters - F01N 3/101: {Three-way catalysts} - F01N 3/103: {Oxidation catalysts for HC and CO only} - F01N 3/2066: {Selective catalytic reduction [SCR]} - F01N 3/208: {Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent} - 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 11/00: Monitoring or diagnostic devices for exhaust-gas treatment apparatus - F02D 41/0002: {Controlling intake air} - F02D 41/0245: {by increasing temperature of the exhaust gas leaving the engine} - F02D 41/0275: {the exhaust gas treating apparatus being a NOx trap or adsorbent} - F02D 41/3005: {Details not otherwise provided for} - F01N 2430/00: Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics - F01N 2550/02: Catalytic activity of catalytic converters - F01N 2570/14: Nitrogen oxides - F01N 2610/02: the substance being ammonia or urea - F01N 2900/1402: Exhaust gas composition - F01N 2900/1404: Exhaust gas temperature - F01N 2900/1411: Exhaust gas flow rate, e.g. mass flow rate or volumetric flow rate - F01N 2900/1616: NH3-slip from catalyst - F01N 2900/1621: Catalyst conversion efficiency - F02D 41/1445: {the characteristics being related to the exhaust flow} - F02D 41/1446: {the characteristics being exhaust temperatures} - F02D 41/146: {the characteristics being an NOx content or concentration} - F02D 2041/1468: {the characteristics being an ammonia content or concentration of the exhaust gases} - Y02T 10/12: Improving ICE efficiencies - Y02T 10/40: Engine management systems - 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) - 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 Systems and apparatuses include an a system including an engine out sensor, an exhaust sensor, and one or more processing circuits comprising one or more memory devices coupled to one or more processors. The one or more memory devices are configured to store instructions thereon that, when executed by the one or more processors, cause the one or more processors to receive the engine out sensor information from the engine out sensor, receive the exhaust information from the exhaust sensor, determine the aftertreatment system characteristic based on the exhaust information, compare the aftertreatment system characteristic to an exhaust condition, determine an acceptable input value when the aftertreatment system characteristic meets the exhaust condition, and control at least one of a fuel system actuator and an air handling actuator to achieve the acceptable input value. ## Claims ### Claim 1 A system comprising: an engine out sensor positioned between an engine system and an aftertreatment system within a flow of exhaust gas, the sensor structured to provide engine out information; an exhaust sensor structured to provide exhaust information indicative of an aftertreatment system characteristic; and one or more processing circuits comprising one or more memory devices coupled to one or more processors, the one or more memory devices configured to store instructions thereon that, when executed by the one or more processors, cause the one or more processors to: receive the engine out sensor information from the engine out sensor; receive the exhaust information from the exhaust sensor; determine the aftertreatment system characteristic based on the exhaust information; compare the aftertreatment system characteristic to an exhaust condition; determine an acceptable input value when the aftertreatment system characteristic meets the exhaust condition, wherein the acceptable input value defines a desired condition of exhaust gas exiting the engine system based on the engine out sensor information; and control at least one of a fuel system actuator or an air handling actuator to achieve the acceptable input value. ### Claim 2 (depends on 1) The system of claim 1, wherein the one or more processing circuits are in feedback communication with the engine system and continuously operate the engine system to achieve the acceptable input value. ### Claim 3 (depends on 1) The system of claim 1, wherein the aftertreatment system characteristic is a NOx reduction efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes an increased engine out temperature when the NOx reduction efficiency is less than or equal to the predetermined threshold. ### Claim 4 (depends on 1) The system of claim 1, wherein the aftertreatment system characteristic is a NOx reduction efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes a decreased engine out temperature or an increased engine out NOx when the NOx reduction efficiency is equal to or exceeds the predetermined threshold. ### Claim 5 (depends on 1) The system of claim 1, wherein the aftertreatment system characteristic is a NOx reduction efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes a decreased engine out NOx when the NOx reduction efficiency is less than or equal to the predetermined threshold. ### Claim 6 (depends on 1) The system of claim 1, wherein the aftertreatment system characteristic is an ammonia slip efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes an increased engine out NOx when the ammonia slip condition is equal to or exceeds the predetermined threshold. ### Claim 7 (depends on 1) The system of claim 1, wherein the exhaust information includes at least one of a system out NOx value, an exhaust flow rate value, an exhaust gas temperature, a reductant dosing value, an ammonia slip value, or an ammonia storage factor. ### Claim 8 A system comprising: a controller including a processing circuit, the controller structured to: receive information regarding engine out information; receive exhaust gas information indicative of an aftertreatment system characteristic; determine the aftertreatment system characteristic based on the exhaust gas information; compare the aftertreatment system characteristic to an exhaust condition; determine an acceptable input value when the aftertreatment system characteristic meets the exhaust condition, wherein the acceptable input value defines a desired condition of exhaust gas exiting an engine system based on the engine out information; and control at least one actuator to achieve the acceptable input value. ### Claim 9 (depends on 8) The system of claim 8, wherein the controller is in feedback communication with the engine system and continuously operates the engine system to achieve the acceptable input value. ### Claim 10 (depends on 8) The system of claim 8, wherein the aftertreatment system characteristic is a NOx reduction efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes an increased engine out temperature when the NOx reduction efficiency is less than or equal to the predetermined threshold. ### Claim 11 (depends on 8) The system of claim 8, wherein the aftertreatment system characteristic is a NOx reduction efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes a decreased engine out temperature or an increased engine out NOx when the NOx reduction efficiency is equal to or exceeds the predetermined threshold. ### Claim 12 (depends on 8) The system of claim 8, wherein the aftertreatment system characteristic is a NOx reduction efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes a decreased engine out NOx when the NOx reduction efficiency is less than or equal to the predetermined threshold. ### Claim 13 (depends on 8) The system of claim 8, wherein the aftertreatment system characteristic is an ammonia slip efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes an increased engine out NOx when the ammonia slip condition is equal to or exceeds the predetermined threshold. ### Claim 14 (depends on 8) The system of claim 8, wherein the exhaust gas information includes at least one of a system out NOx value, an exhaust flow rate, an exhaust gas temperature, a reductant dosing value, an ammonia slip value, or an ammonia storage factor. ### Claim 15 A method comprising: receiving an engine out signal by a controller, the engine out signal indicative of engine out information; receiving an exhaust gas signal by the controller, the exhaust gas signal indicative of exhaust gas information; determining, by the controller, an aftertreatment system characteristic based on the exhaust gas information; comparing, by the controller, the aftertreatment system characteristic to an exhaust condition; determining, by the controller, an acceptable input value when the aftertreatment system characteristic meets the exhaust condition, wherein the acceptable input value defines a desired condition of exhaust gas exiting the engine system based on the engine out information; and controlling, by the controller, at least one actuator to achieve the acceptable input value. ### Claim 16 (depends on 15) The method of claim 15, wherein the aftertreatment system characteristic is a NOx reduction efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes an increased engine out temperature when the NOx reduction efficiency is less than or equal to the predetermined threshold. ### Claim 17 (depends on 15) The method of claim 15, wherein the aftertreatment system characteristic is a NOx reduction efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes a decreased engine out temperature or an increased engine out NOx when the NOx reduction efficiency is equal to or exceeds the predetermined threshold. ### Claim 18 (depends on 15) The method of claim 15, wherein the aftertreatment system characteristic is a NOx reduction efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes a decreased engine out NOx when the NOx reduction efficiency is less than or equal to the predetermined threshold. ### Claim 19 (depends on 15) The method of claim 15, wherein the aftertreatment system characteristic is an ammonia slip efficiency and the exhaust condition is a predetermined threshold, and wherein the acceptable input value includes an increased engine out NOx when the ammonia slip condition is equal to or exceeds the predetermined threshold. ### Claim 20 (depends on 15) The method of claim 15, wherein the exhaust gas information includes at least one of a system out NOx, an exhaust flow rate, an exhaust gas temperature, a reductant dosing value, an ammonia slip value, or an ammonia storage factor.