# US 2022/0034273 A1 · Apparatus, system and method for thermal management by deploying engine fueling on demand > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0034273 A1 - Document ID: US20220034273A1 - Status: Published application - Kind: A1 - Application number: 17/502,291 - Filed: 2021-10-15 - Published: 2022-02-03 - Earliest claimed: 2019-04-18 - Assignees: Cummins Inc. - Applicants: Cummins Inc. - Inventors: Hasan Mohammed; Jeffrey S. O'Neill - Web page: https://patentgrep.com/patent/US20220034273A1 ## CPC - F02D 41/0245: {by increasing temperature of the exhaust gas leaving the engine} - F02D 41/3845: {by controlling the flow into the common rail, e.g. the amount of fuel pumped} - F01N 3/02: for cooling, or for removing solid constituents of, exhaust (by means of electric or electrostatic separators F01N3/01 {; mixing air with exhaust in tailpipes F01N13/082, F01N13/20}) - F01N 3/021: by means of filters - F01N 3/10: by thermal or catalytic conversion of noxious components of exhaust - F01N 3/103: {Oxidation catalysts for HC and CO only} - F01N 3/105: {General auxiliary catalysts, e.g. upstream or downstream of the main catalyst} - F01N 3/20: specially adapted for catalytic conversion (F01N3/22 takes precedence) - F01N 3/24: characterised by constructional aspects of converting apparatus (filtering in combination with catalytic reactors F01N3/035) - 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 - F01N 11/002: {the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus} - F02D 33/006: {depending on engine operating conditions, e.g. start, stop or ambient conditions} - F02D 41/3863: {by controlling the flow out of the common rail, e.g. using pressure relief valves} - F01N 2560/06: the means being a temperature sensor - F02D 41/1446: {the characteristics being exhaust temperatures} - F02D 2041/026: {using an external load, e.g. by increasing generator load or by changing the gear ratio} - F02D 2200/101: Engine speed - 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 A method includes receiving information indicative of a temperature of exhaust gas emitted from an engine operating at an engine speed, determining that the temperature of the exhaust gas is below a predefined temperature threshold, determining an engine load sized to increase the temperature of the exhaust gas above the predefined temperature threshold, increasing a load on the engine to the determined engine load while maintaining the engine at the engine speed by increasing at least one of a fuel flow rate and a fuel flow pressure of the fuel pump powered by the engine, and diverting the excess fuel from the fuel flow path upstream of the engine. Increasing at least one of the fuel flow rate and the fuel pressure of the fuel pump causes excess fuel to be provided to the engine than is necessary to maintain the engine at the engine speed. ## Claims ### Claim 1 A method comprising: receiving information indicative of a temperature of exhaust gas emitted from an engine operating at least one of an engine speed below a predefined speed threshold or a low engine load; determining that the temperature of the exhaust gas is below a predefined temperature threshold; determining an engine load structured to increase the temperature of the exhaust gas above the predefined temperature threshold; increasing a load on the engine to the determined engine load while maintaining the engine at the engine speed by increasing at least one of a fuel flow rate and a fuel flow pressure of a fuel pump powered by the engine, wherein the increasing at least one of the fuel flow rate and the fuel flow pressure of the fuel pump causes excess fuel to be provided to the engine than is necessary to maintain the engine at the commanded engine speed; and diverting, by a fuel metering device, the excess fuel from a fuel flow path of the fuel upstream of the engine. ### Claim 2 (depends on 1) The method of claim 1, wherein the fuel flow pressure is increased to a maximum pressure achievable at the engine speed. ### Claim 3 (depends on 1) The method of claim 1, wherein the increasing of the fuel flow rate includes determining an increased fuel flow rate structured to provide a target fuel flow pressure and a target exhaust gas temperature. ### Claim 4 (depends on 1) The method of claim 1, wherein the fuel flow rate is increased to a maximum flow rate achievable at the engine speed. ### Claim 5 (depends on 1) The method of claim 1, wherein the engine speed is an idle engine speed. ### Claim 6 (depends on 1) The method of claim 1, wherein the information indicative of the temperature of the exhaust is received in real-time or substantially real-time. ### Claim 7 (depends on 6) The method of claim 6, wherein increasing the load on the engine includes continuously manipulating at least one of the fuel flow rate and the fuel flow pressure in real-time or substantially real-time. ### Claim 8 A system comprising: a fuel pump powered by an engine and structured to provide fuel to the engine along a fuel flow path; a fuel metering device positioned along the fuel flow path and structured to divert excess fuel from the fuel flow path of the fuel upstream of the engine; and a controller structured to: receive information indicative of a temperature of exhaust gas emitted from the engine operating at an engine speed; determine that the temperature of the exhaust gas is below a predefined temperature threshold; determine an engine load sized to increase the temperature of the exhaust gas above the predefined temperature threshold; increase a load on the engine to the determined engine load while maintaining the engine at the engine speed by increasing at least one of a fuel flow rate and a fuel flow pressure of the fuel pump powered by the engine, wherein increasing at least one of the fuel flow rate and the fuel flow pressure of the fuel pump causes excess fuel to be provided to the engine than is necessary to maintain the engine at the engine speed; and divert the excess fuel from the fuel flow path of the fuel upstream of the engine. ### Claim 9 (depends on 8) The system of claim 8, wherein the fuel flow pressure is increased to a maximum pressure achievable at the engine speed. ### Claim 10 (depends on 9) The system of claim 9, wherein the increasing of the fuel flow rate includes determining an increased fuel flow rate structured to provide a target fuel flow pressure and a target exhaust gas temperature. ### Claim 11 (depends on 9) The system of claim 9, wherein the fuel flow rate is increased to a maximum flow rate achievable at the engine speed. ### Claim 12 (depends on 9) The system of claim 9, wherein the engine speed is an idle engine speed. ### Claim 13 (depends on 9) The system of claim 9, wherein the controller is structured to receive information of the temperature of the exhaust gas in real-time or substantially real-time. ### Claim 14 (depends on 13) The system of claim 13, wherein the controller is structured to continuously manipulate least one of a fuel flow rate and a fuel flow pressure of the fuel pump powered by the engine. ### Claim 15 An apparatus comprising: a catalyst health management (CHM) circuit structured to: receive information indicative of a temperature of exhaust gas emitted from an engine; and determine that the temperature of the exhaust gas is below a predefined temperature threshold; and a load generation circuit structured to: determine an engine load that increases the temperature of the exhaust gas above the predefined temperature threshold; increase a load on the engine to the determined engine load while maintaining the engine at a particular engine speed by increasing at least one of a fuel flow rate or a fuel flow pressure of a fuel pump, wherein increasing the at least one of the fuel flow rate or the fuel flow pressure of the fuel pump causes excess fuel to be provided to the engine than is necessary to maintain the engine at the particular engine speed; and control a fuel metering device to divert excess fuel from the fuel flow path of the fuel upstream of the engine. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the load generation circuit is structured to increase the fuel flow pressure to a maximum pressure and/or a maximum flow rate achievable at the particular engine speed. ### Claim 17 (depends on 15) The apparatus of claim 15, wherein the increasing of the fuel flow rate includes determining an increased fuel flow rate structured to provide a target fuel flow pressure and a target exhaust gas temperature. ### Claim 18 (depends on 15) The apparatus of claim 15, wherein the particular engine speed is an idle engine speed. ### Claim 19 (depends on 15) The apparatus of claim 15, wherein the CHM circuit is structured to receive information of the temperature of the exhaust gas in real-time or substantially real-time. ### Claim 20 (depends on 15) The apparatus of claim 15, wherein the load generation circuit is structured to continuously manipulate least one of a fuel flow rate or a fuel flow pressure of the fuel pump powered by the engine.