# US 10,767,526 B2 · Gasoline particle filter temperature control > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,526 B2 - Document ID: US10767526B2 - Status: Granted - Kind: B2 - Application number: 16/419,916 - Filed: 2019-05-22 - Published: 2019-09-05 - Granted: 2020-09-08 - Earliest claimed: 2016-01-19 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Joseph Norman Ulrey; Emil G. Serban; Michiel J. Van Nieuwstadt - Web page: https://patentgrep.com/patent/US10767526B2 ## CPC - F01N 3/0235: {using exhaust gas throttling means} - F01N 3/021: by means of filters - F01N 9/002: {of filter regeneration} - F01N 11/002: {the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus} - F02D 13/0215: {changing the valve timing only} - F02D 13/0261: {Controlling the valve overlap} - F02D 41/0005: {during deceleration} - F02D 41/123: {the fuel injection being cut-off} - F01N 2430/06: by varying fuel-air ratio, e.g. by enriching fuel-air mixture - F01N 2560/06: the means being a temperature sensor - F01N 2900/1602: Temperature of exhaust gas apparatus - F02D 41/029: {the exhaust gas treating apparatus being a particulate filter} - F02D 2041/001: {for engines with variable valve actuation} - F02D 2041/002: {by simultaneous control of throttle and variable valve actuation} - F02D 2200/0406: Intake manifold pressure - F02D 2200/0802: Temperature of the exhaust gas treatment apparatus - Y02T 10/12: Improving ICE efficiencies - Y02T 10/40: Engine management systems - 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) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract Methods and systems are provided for controlling particulate filter temperature during non-combustion conditions. In one example, a method for an engine includes responsive to a particulate filter temperature above a threshold temperature and while operating the engine with deceleration fuel shut-off (DFSO), fully closing a throttle valve configured to regulate flow of intake air to the engine, and responsive to intake manifold pressure dropping below a threshold pressure while the throttle valve is fully closed, adjusting a position of the throttle valve based on the particulate filter temperature. ## Claims ### Claim 1 A system, comprising: an engine including a plurality of cylinders, each cylinder including at least one intake valve and at least one exhaust valve; a throttle valve controlling flow of intake air to the engine; a particulate filter coupled to the engine via an exhaust passage; and a controller having computer readable instructions stored on non-transitory memory for: initiating a deceleration fuel shut-off (DFSO) event during a vehicle deceleration event by deactivating a fuel supply to the plurality of cylinders of the engine; closing the throttle valve responsive to initiating the DFSO event; and when an intake manifold pressure of the engine drops below a threshold pressure, adjusting intake and/or exhaust valve timing based on a temperature of the particulate filter. ### Claim 2 (depends on 1) The system of claim 1, wherein adjusting intake and/or exhaust valve timing based on a temperature of the particulate filter comprises adjusting intake and/or exhaust valve timing to increase valve overlap when the temperature of the particulate filter is above a threshold temperature. ### Claim 3 (depends on 2) The system of claim 2, wherein the valve overlap is increased relative to an amount of valve overlap prior to initiating of the DFSO event. ### Claim 4 (depends on 2) The system of claim 2, wherein the controller has further instructions for opening the throttle valve by a predetermined amount when the intake manifold pressure is below the threshold pressure and the temperature of the particulate filter is below the threshold temperature. ### Claim 5 (depends on 1) The system of claim 1, wherein the controller has further instructions for, responsive to a request to exit of DFSO, opening the throttle valve and reactivating the fuel supply. ### Claim 6 (depends on 1) The system of claim 1, wherein the fuel supply to the plurality of cylinders of the engine comprises a direct-injection gasoline fuel supply. ### Claim 7 A system, comprising: an engine including a plurality of cylinders; a throttle valve controlling flow of intake air to the engine; a particulate filter coupled to the engine via an exhaust passage; and a controller having computer readable instructions stored on non-transitory memory executable to: responsive to a particulate filter temperature above a threshold temperature and while operating the engine with deceleration fuel shut-off (DFSO), fully close the throttle valve; and responsive to intake manifold pressure dropping below a threshold pressure while the throttle valve is fully closed, adjust a position of the throttle valve based on the particulate filter temperature. ### Claim 8 (depends on 7) The system of claim 7, wherein adjusting the position of the throttle valve based on the particulate filter temperature comprises, when the particulate filter temperature is above the threshold temperature and below a second, higher threshold temperature, opening the throttle valve by a predetermined amount to increase intake manifold pressure. ### Claim 9 (depends on 8) The system of claim 8, wherein each cylinder includes at least one intake valve and at least one exhaust valve, and wherein adjusting the position of the throttle valve based on the particulate filter temperature comprises, when the particulate filter temperature is above the second threshold temperature, maintaining the throttle valve fully closed and adjusting intake and exhaust valve timing to increase intake manifold pressure. ### Claim 10 (depends on 9) The system of claim 9, wherein adjusting intake and exhaust valve timing comprises increasing intake and exhaust valve overlap. ### Claim 11 (depends on 7) The system of claim 7, wherein operating the engine with DFSO comprises transmitting engine output to vehicle wheels via a transmission, and deactivating fuel injection to the engine during a deceleration condition of a vehicle in which the engine is installed. ### Claim 12 (depends on 7) The system of claim 7, wherein the instructions are executable to, responsive to the particulate filter temperature being below the threshold temperature while the engine is operating in DFSO, maintain the throttle valve at a fully open or partially open position. ### Claim 13 (depends on 7) The system of claim 7, wherein the instructions are executable to, responsive to a request to exit out of operation with DFSO, activate fuel injection to the engine and adjust a position of the throttle valve based on requested torque. ### Claim 14 (depends on 13) The system of claim 13, wherein adjusting a position of the throttle valve based on requested torque comprises adjusting a position of the throttle valve based on operator-requested torque. ### Claim 15 (depends on 13) The system of claim 13, wherein adjusting a position of the throttle valve based on requested torque comprises adjusting a position of the throttle valve based on vehicle-requested torque including one or more auxiliary loads placed on the engine. ### Claim 16 (depends on 15) The system of claim 15, wherein the instructions are executable to, prior to exiting out of operation with DFSO, increase one or more auxiliary loads placed on the engine and open the throttle valve responsive to a predicted subsequent exit out of operation with DFSO.