Patents by Inventor Christopher GESSENHARDT
Christopher GESSENHARDT has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240102427Abstract: A method of heating a catalytic converter of an internal combustion engine, wherein the method comprises the steps of: igniting the gas charge in one of the cylinders in a range from 10° CA before ignition top dead center to 20° CA after ignition top dead center; and opening the exhaust valve of the cylinder exhaust of the cylinder in a range from 30° CA to 55° CA after ignition top dead center. The method allows the catalytic converter of the internal combustion engine to quickly reach operating temperature and thus contributes to the reduction of pollutant emissions. An internal combustion engine is also provided that is designed to carry out the method of the invention for heating a catalytic converter.Type: ApplicationFiled: December 9, 2023Publication date: March 28, 2024Applicant: Volkswagen AktiengesellschaftInventors: Christopher GESSENHARDT, Karsten MICHELS
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Publication number: 20230235712Abstract: A method for heating an exhaust gas aftertreatment component in an exhaust system of an internal combustion engine. At the combustion chamber, a fuel injector for injecting a fuel into the combustion chamber and a spark plug for igniting a flammable fuel-air mixture are arranged. The internal combustion engine has a valve lift curve switching mechanism, which allows for a shift and/or change of the opening times of the exhaust valve. The method includes: intake of fresh air into the combustion chamber, injection of a fuel into the combustion chamber, ignition of an ignitable fuel-air mixture in the combustion chamber when the piston is in a range of 10° KW to 30° KW after the upper ignition dead point, and opening of the exhaust valve when the piston is in a range of 55° KW to 95° KW after the upper ignition dead point.Type: ApplicationFiled: January 20, 2023Publication date: July 27, 2023Applicant: Volkswagen AktiengesellschaftInventors: Christopher GESSENHARDT, Sven BRANNYS, Sergej JAKOVLEV
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Patent number: 11118521Abstract: The invention relates to a method for operating an internal combustion engine, which has an internal combustion motor, which forms at least two combustion chambers, which are bounded by cylinders formed in a cylinder housing and by pistons guided up and down cyclically in said cylinders and in which thermodynamic cycles can be performed during operation of the internal combustion engine, wherein then a gas exchange in the combustion chambers is controlled by means of at least one intake valve (28) and one exhaust valve in the case of each combustion chamber, which valves are actuated by means of cams, and wherein a first operating state is provided, in which the thermodynamic cycles are performed both in a first combustion chamber and in a second combustion chamber and a second operating state is provided, in which the thermodynamic cycles are performed in the first combustion chamber and the thermodynamic cycles are not performed in the second combustion chamber, is characterized in that, in order to switchType: GrantFiled: May 22, 2017Date of Patent: September 14, 2021Assignee: VOLKSWAGEN AKTIENGESELLSCHAFTInventors: Christopher Gessenhardt, Henrik Hoffmeyer, Nico Schreeck
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Patent number: 11085379Abstract: A method for controlling a multi-cylinder combustion engine, wherein the combustion engine has a first operating state in which all cylinders are active, and a second operating state in which one of the multiple cylinders is active and one of the multiple cylinders is deactivated. The method comprises switching the combustion engine from the first to the second operating state, wherein, in the cylinder to be deactivated, an exhaust valve is deactivated after a combustion stroke and an intake valve is deactivated before an intake stroke following the combustion stroke in the closed state, and changing an ignition angle of the cylinder to be deactivated to an earlier ignition time and an optional change of the air/fuel mixture leads to a reduction in a temperature of an exhaust gas arising during the combustion stroke.Type: GrantFiled: September 13, 2019Date of Patent: August 10, 2021Assignee: Volkswagen AktiengesellschaftInventors: Tim Thaler, Christopher Gessenhardt
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Publication number: 20210140362Abstract: An exhaust gas turbocharger assembly for a turbocharged internal combustion engine with a spiral housing, having at least two separated flow passages, at least one separating tongue separating the adjacent flow passages, and a turbine rotor, wherein the separating tongue is arranged such that the end of the separating tongue, said end facing the turbine rotor, is spaced from the edge of the turbine rotor such that crosstalk between the flow passages in the flow direction occurs upstream of the turbine rotor, wherein a crosstalk cross section AÜS is determinable depending on the distance between the separating tongue end and the edge of the turbine rotor.Type: ApplicationFiled: November 9, 2020Publication date: May 13, 2021Applicant: Volkswagen AktiengesellschaftInventors: Christopher GESSENHARDT, Dirk HAGELSTEIN, Tobias CZAPKA
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Patent number: 10961929Abstract: A method for a combustion motor that is initially used in a full Miller cycle or full Atkinson cycle that is advantageous with regard to efficiency. In full operation, a switchover to a partial operation takes place, wherein the intake valves associated with the combustion chambers that are to continue to be operated are switched over to actuation in accordance with a second valve lifting curve in order to achieve a switchover that is as torque-neutral as possible and is optimal with regard to efficiency. The closing time of the intake valve brought about by this second valve lifting curve is designed with respect to maximum volumetric efficiency.Type: GrantFiled: October 11, 2019Date of Patent: March 30, 2021Assignee: Volkswagen AktiengesellschaftInventor: Christopher Gessenhardt
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Publication number: 20200325838Abstract: The invention relates to a method for operating an internal combustion engine, which has an internal combustion motor, which forms at least two combustion chambers, which are bounded by cylinders formed in a cylinder housing and by pistons guided up and down cyclically in said cylinders and in which thermodynamic cycles can be performed during operation of the internal combustion engine, wherein then a gas exchange in the combustion chambers is controlled by means of at least one intake valve (28) and one exhaust valve in the case of each combustion chamber, which valves are actuated by means of cams, and wherein a first operating state is provided, in which the thermodynamic cycles are performed both in a first combustion chamber and in a second combustion chamber and a second operating state is provided, in which the thermodynamic cycles are performed in the first combustion chamber and the thermodynamic cycles are not performed in the second combustion chamber, is characterized in that, in order to switchType: ApplicationFiled: May 22, 2017Publication date: October 15, 2020Applicant: VOLKSWAGEN AKTIENGESELLSCHAFTInventors: Christopher GESSENHARDT, Henrik HOFFMEYER, Nico SCHREECK
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Publication number: 20200088115Abstract: A method for controlling a multi-cylinder combustion engine, wherein the combustion engine has a first operating state in which all cylinders are active, and a second operating state in which one of the multiple cylinders is active and one of the multiple cylinders is deactivated. The method comprises switching the combustion engine from the first to the second operating state, wherein, in the cylinder to be deactivated, an exhaust valve is deactivated after a combustion stroke and an intake valve is deactivated before an intake stroke following the combustion stroke in the closed state, and changing an ignition angle of the cylinder to be deactivated to an earlier ignition time and an optional change of the air/fuel mixture leads to a reduction in a temperature of an exhaust gas arising during the combustion stroke.Type: ApplicationFiled: September 13, 2019Publication date: March 19, 2020Applicant: Volkswagen AktiengesellschaftInventors: Tim THALER, Christopher GESSENHARDT
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Publication number: 20200040828Abstract: A method for a combustion motor that is initially used in a full Miller cycle or full Atkinson cycle that is advantageous with regard to efficiency. In full operation, a switchover to a partial operation takes place, wherein the intake valves associated with the combustion chambers that are to continue to be operated are switched over to actuation in accordance with a second valve lifting curve in order to achieve a switchover that is as torque-neutral as possible and is optimal with regard to efficiency. The closing time of the intake valve brought about by this second valve lifting curve is designed with respect to maximum volumetric efficiency.Type: ApplicationFiled: October 11, 2019Publication date: February 6, 2020Applicant: Volkswagen AktiengesellschaftInventor: Christopher GESSENHARDT