# US 11,111,833 B2 · Method for heating an exhaust system of a combustion engine of a motor vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,111,833 B2 - Document ID: US11111833B2 - Status: Granted - Kind: B2 - Application number: 16/708,642 - Filed: 2019-12-10 - Published: 2020-06-18 - Granted: 2021-09-07 - Earliest claimed: 2018-12-13 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Alexander Franz; Arthur Bastoreala; Cornelia Nagel; Tobias Pfister - Web page: https://patentgrep.com/patent/US11111833B2 ## CPC - 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 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 9/007: {Storing data relevant to operation of exhaust systems for later retrieval and analysis, e.g. to research exhaust system malfunctions} - F01N 3/023: using means for regenerating the filters, e.g. by burning trapped particles - F01N 3/0814: {combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts} - F01N 3/0842: {Nitrogen oxides} - F01N 3/2066: {Selective catalytic reduction [SCR]} - F01N 2240/16: an electric heater, i.e. a resistance heater - F01N 2430/00: Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics - F01N 2900/0601: being estimated - F01N 2900/0602: Electrical exhaust heater signals - F01N 2900/1404: Exhaust gas temperature - F01N 2900/1602: Temperature of exhaust gas apparatus - Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters - 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) - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract In a method for heating an exhaust system of a combustion engine of a motor vehicle, the exhaust system comprises at least two components for exhaust gas cleaning. For at least one component, a temperature regulation is provided for heating the component while using a heating operation mode. For the heating of the exhaust system, a heating operation is used via a pulse control with heating pulses (101) and heating pauses (102), which switches between a heating operation mode and a normal operation without heating measures. ## Claims ### Claim 1 A method for heating an exhaust system of a combustion engine (10) of a motor vehicle, wherein the exhaust system comprises at least two components (12, 13, 15) for exhaust gas cleaning and wherein for a first component (12) of the at least two components (12, 13, 15), a temperature regulation is provided for heating the first component (12) while in a heating operation mode, wherein, in the heating operation mode, a heating operation is used for additionally heating a second component (13) of the at least two components (13, 15), for which no temperature regulation is provided, via a pulse control including heating pulses (101) and heating pauses (102), and wherein the method further comprises switching between the heating operation mode and a normal operation that does not include heating measures and wherein the heating operation mode includes affecting an injection timing of the combustion engine (10). ### Claim 2 (depends on 1) The method according to claim 1, wherein a demand for the heating operation mode is made based on attaining a temperature threshold for a temperature in the second component of the at least two components in the exhaust system for which no temperature regulation is provided. ### Claim 3 (depends on 2) The method according to claim 2, wherein the attaining of the temperature threshold is monitored via a temperature gradient. ### Claim 4 (depends on 3) The method according to claim 3, wherein a threshold value for the temperature gradient is dependent on an absolute value of an exhaust gas temperature. ### Claim 5 (depends on 1) The method according to claim 1, wherein attaining of a critical temperature for at least one of the at least two components in the exhaust system is avoided by the pulse control. ### Claim 6 (depends on 1) The method according to claim 1, wherein the pulse control is used to maintain a target temperature in the second component (13) of the exhaust system for which no temperature regulation is provided. ### Claim 7 (depends on 1) The method according to claim 1, wherein an additional fuel demand needed for the heating operation mode is used to define a maximum length of a heating pulse of the heating pulses (101) of the pulse control and a demand of the heating operation mode occurs based on a derived heating pulse length threshold value. ### Claim 8 (depends on 7) The method according to claim 7, wherein in the heating pulse length threshold value is based on an absolute value of an exhaust gas temperature used. ### Claim 9 (depends on 1) The method according to claim 1 further comprising setting a minimum duration for defining a heating pause of the heating pauses (102) of the pulse control based on a physical quantity. ### Claim 10 (depends on 9) The method according to claim 9 further comprising setting a heating pause length threshold value for the minimum duration of the heating pause (102) based on an absolute value of an exhaust gas temperature. ### Claim 11 (depends on 1) The method according to claim 1, wherein the pulse control is based on a prediction of a temperature variation in the exhaust system during the normal operation without heating measures. ### Claim 12 (depends on 1) An electronic controller which is designed to carry out the steps of the method according to claim 1. ### Claim 13 (depends on 1) The method according to claim 1, wherein the second component (13) is located upstream of the first component (12). ### Claim 14 A method for heating an exhaust system of a combustion engine (10) of a motor vehicle, wherein the exhaust system comprises at least three components (12, 13, 15) for exhaust gas cleaning and wherein for a first component (12) of the at least three components (12, 13, 15), a temperature regulation is provided for heating the first component (12) while in a heating operation mode, wherein, in the heating operation mode, a heating operation is used for additionally heating a second component (13) and a third component (15) of the at least three components (13, 15), for which no temperature regulation is provided, via a pulse control including heating pulses (101) and heating pauses (102), and wherein the method further comprises switching between the heating operation mode and a normal operation that does not include heating measures.