Patents by Inventor Christoph Klesse
Christoph Klesse 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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Patent number: 11261819Abstract: A method operates a fuel-supply system for an internal combustion engine. The fuel-supply system contains a high-pressure fuel pump, a high-pressure fluid accumulator having a fuel-injection valve, and a high-pressure sensor. A measurement signal of the sensor is representative of a pressure within the high-pressure fluid accumulator. The high-pressure fuel pump is fluidically connected on the outlet side to the high-pressure fluid accumulator. A respective maximum injection quantity of the fuel-injection valve is determined depending on the measurement signal of the high-pressure sensor. The injection quantity is determined depending on an efficiency characteristic representing the efficiency of the high-pressure fuel pump, the efficiency characteristic depending on the measurement signal of the high-pressure sensor.Type: GrantFiled: October 13, 2015Date of Patent: March 1, 2022Assignee: Vitesco Technologies GmbHInventors: Christoph Klesse, Tobias Ritsch
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Patent number: 11029229Abstract: A method according to the invention for checking the plausibility of the function of a pressure sensor in an injection system of an internal combustion engine includes acquiring a calibrated actuation profile, by which peak current values for opening at least one electrically actuatable injection valve are assigned to existing internal pressures. An existing internal pressure is measured in the form of an actual sensor pressure value by the pressure sensor. The method includes obtaining the electrical peak current value corresponding to the measured sensor pressure value from a calibrated actuation profile, such that the corresponding electrical peak current value acquired in this way is applied to the injection valve. Subsequently, an opening state of the injection valve is monitored in reaction to the applied electrical peak current value, and a functional state of the pressure sensor is assigned as a function of the opening state of the injection valve.Type: GrantFiled: January 30, 2018Date of Patent: June 8, 2021Assignee: Vitesco Technologies GmbHInventors: Christoph Klesse, Tobias Ritsch, Claus Stephani, Thomas Uliana
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Patent number: 10865729Abstract: A method for operating an internal combustion engine having a high-pressure fuel injection system stops and starts the engine independently of an intervention by the motor vehicle operator and then restarted. A high-pressure fuel pump is used to pump fuel to a high-pressure reservoir to which at least one high-pressure fuel injector is connected in order to inject fuel into the at least one cylinder of the internal combustion engine. Fuel pressure can be adjusted on the high-pressure side using an electrically actuated pressure reduction valve (PDV).Type: GrantFiled: March 26, 2018Date of Patent: December 15, 2020Assignee: VITESCO TECHNOLOGIES GMBHInventors: Erwin Achleitner, Christoph Klesse, Tobias Ritsch
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Patent number: 10309335Abstract: The present invention relates to a method for operating a fuel supply system for an internal combustion engine, and to a corresponding device. The fuel supply system of an internal combustion engine may include: an outlet of a high-pressure pump coupled to a pressure-limiting valve and a high-pressure fluid accumulator. The method may include, when the internal combustion engine is set into a deactivated state, actuating the high-pressure pump such that, at the outlet side of the high-pressure pump, a pressure is increased such that the pressure-limiting valve is opened.Type: GrantFiled: August 17, 2015Date of Patent: June 4, 2019Assignee: CONTINENTAL AUTOMOTIVE GMBHInventors: Christoph Klesse, Thomas Riedel, Hans Riepl, Tobias Ritsch, Michael Wirkowski
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Patent number: 10215143Abstract: A pressure-limiting valve for a fuel injection system includes a housing having a fluid inlet and a fluid outlet, a sealing seat, and a sealing body configured to move between a closed position in which the sealing body is in contact with the sealing seat, which blocks fluid flow from the fluid inlet to the fluid outlet, and additional positions that permit such fluid flow, and a holding device for keeping the sealing body in one of the additional positions if the sealing body is moved at least a specified distance away from the sealing seat.Type: GrantFiled: September 29, 2014Date of Patent: February 26, 2019Assignee: CONTINENTAL AUTOMOTIVE GMBHInventors: Christoph Klesse, Tobias Ritsch, Robert Wiench, Michael Wirkowski
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Patent number: 10174735Abstract: An injection device for an internal combustion engine includes a fuel delivery pump and a high-pressure pump which are connected to one another via a low-pressure fuel line. A high-pressure accumulator is connected to the high-pressure pump. At least one injector is connected via a high-pressure fuel line to the high-pressure accumulator. The injection device also has at least one fuel return line which is connected to the high-pressure accumulator and/or to the at least one injector. The fuel return line issues into the low-pressure fuel line which connects the fuel delivery pump and the high-pressure pump to one another. At least one air bleed valve is arranged in the course of the low-pressure fuel line or on the high-pressure pump or on a filter housing.Type: GrantFiled: July 17, 2013Date of Patent: January 8, 2019Assignee: Continental Automotive GmbHInventors: Tobias Ritsch, Daniel Anetsberger, Christoph Klesse, Uwe Lingener
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Publication number: 20180209372Abstract: A method for operating an internal combustion engine having a high-pressure fuel injection system stops and starts the engine independently of an intervention by the motor vehicle operator and then restarted. A high-pressure fuel pump is used to pump fuel to a high-pressure reservoir to which at least one high-pressure fuel injector is connected in order to inject fuel into the at least one cylinder of the internal combustion engine. Fuel pressure can be adjusted on the high-pressure side using an electrically actuated pressure reduction valve (PDV).Type: ApplicationFiled: March 26, 2018Publication date: July 26, 2018Applicant: Continental Automotive GmbHInventors: Erwin ACHLEITNER, Christoph KLESSE, Tobias RITSCH
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Publication number: 20180149543Abstract: A method according to the invention for checking the plausibility of the function of a pressure sensor in an injection system of an internal combustion engine includes acquiring a calibrated actuation profile, by which peak current values for opening at least one electrically actuatable injection valve are assigned to existing internal pressures. An existing internal pressure is measured in the form of an actual sensor pressure value by the pressure sensor. The method includes obtaining the electrical peak current value corresponding to the measured sensor pressure value from a calibrated actuation profile, such that the corresponding electrical peak current value acquired in this way is applied to the injection valve. Subsequently, an opening state of the injection valve is monitored in reaction to the applied electrical peak current value, and a functional state of the pressure sensor is assigned as a function of the opening state of the injection valve.Type: ApplicationFiled: January 30, 2018Publication date: May 31, 2018Applicant: CONTINENTAL AUTOMOTIVE GMBHInventors: Christoph Klesse, Tobias Ritsch, Claus Stephani, Thomas Uliana
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Patent number: 9816473Abstract: An injection system for an internal combustion engine may include a high-pressure pump for delivering fuel at high pressure into a high-pressure region, wherein the high-pressure pump includes an inlet valve and an electrically switched, digitally actuated outlet valve. The outlet valve is designed as a normally-open outlet valve. In this way, it is possible to dispense with a pressure relief valve for the high-pressure region.Type: GrantFiled: December 13, 2012Date of Patent: November 14, 2017Assignee: CONTINENTAL AUTOMOTIVE GMBHInventors: Thomas Kraft, Tobias Ritsch, Christoph Klesse
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Publication number: 20170241367Abstract: A method operates a fuel-supply system for an internal combustion engine. The fuel-supply system contains a high-pressure fuel pump, a high-pressure fluid accumulator having a fuel-injection valve, and a high-pressure sensor. A measurement signal of the sensor is representative of a pressure within the high-pressure fluid accumulator. The high-pressure fuel pump is fluidically connected on the outlet side to the high-pressure fluid accumulator. A respective maximum injection quantity of the fuel-injection valve is determined depending on the measurement signal of the high-pressure sensor. The injection quantity is determined depending on an efficiency characteristic representing the efficiency of the high-pressure fuel pump, the efficiency characteristic depending on the measurement signal of the high-pressure sensor.Type: ApplicationFiled: October 13, 2015Publication date: August 24, 2017Inventors: CHRISTOPH KLESSE, TOBIAS RITSCH
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Publication number: 20170211504Abstract: The present invention relates to a method for operating a fuel supply system for an internal combustion engine, and to a corresponding device. The fuel supply system of an internal combustion engine may include: an outlet of a high-pressure pump coupled to a pressure-limiting valve and a high-pressure fluid accumulator. The method may include, when the internal combustion engine is set into a deactivated state, actuating the high-pressure pump such that, at the outlet side of the high-pressure pump, a pressure is increased such that the pressure-limiting valve is opened.Type: ApplicationFiled: August 17, 2015Publication date: July 27, 2017Applicant: Continental Automotive GmbHInventors: Christoph Klesse, Thomas Riedel, Hans Riepl, Tobias Ritsch, Michael Wirkowski
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Patent number: 9518545Abstract: An internal combustion engine has a pressure accumulator, a high-pressure pump, a controllable actuator, and camshaft. The high-pressure pump includes a pump piston movably arranged in a cylinder chamber. The pump piston is supported on the camshaft and thus influences an open volume of the cylinder chamber depending on a rotation of the camshaft. The cylinder chamber is hydraulically coupled to the pressure accumulator to pump the fluid into the pressure accumulator. The actuator drives the camshaft such that the camshaft rotates about the camshaft's longitudinal axis in a specified angular range. The high-pressure pump is controlled prior to an expected motor start such that the high-pressure pump is in a self-priming operating state and the actuator is controlled such that the camshaft rotates about the camshaft longitudinal axis in the specified angular range at least once in a first direction and at least once in an opposite second direction.Type: GrantFiled: October 4, 2013Date of Patent: December 13, 2016Assignee: CONTINENTAL AUTOMOTIVE GMBHInventors: Michael Wirkowski, Christian Mey, Christoph Klesse
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Publication number: 20160290298Abstract: An injection system for an internal combustion engine may include a high-pressure pump for delivering fuel at high pressure into a high-pressure region, wherein the high-pressure pump includes an inlet valve and an electrically switched, digitally actuated outlet valve. The outlet valve is designed as a normally-open outlet valve. In this way, it is possible to dispense with a pressure relief valve for the high-pressure region.Type: ApplicationFiled: December 13, 2012Publication date: October 6, 2016Inventors: Thomas Kraft, Tobias Ritsch, Christoph Klesse
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Patent number: 9410498Abstract: A method is disclosed for operating a high-pressure accumulator fuel injection system for an internal combustion engine of a motor vehicle which has a stop-start automatic function by way of which the internal combustion engine can be switched off and restarted afterwards independent of the intervention of the driver of the motor vehicle, the fuel being conveyed to the high-pressure accumulator as needed by means of a high-pressure pump and the pressure of the fuel being adjusted on the pressure side by means of a pressure control valve which is electrically actuated and open when de-energized. According to the method, the supply with power of the pressure control valve is adapted to the prevailing pressure in the high-pressure accumulator during a stop phase within a stop-start cycle.Type: GrantFiled: August 17, 2011Date of Patent: August 9, 2016Assignee: CONTINENTAL AUTOMOTIVE GMBHInventors: Hans Riepl, Christoph Klesse, Daniel Anetsberger, Tobias Ritsch, Thomas Kraft
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Publication number: 20160215743Abstract: A pressure-limiting valve for a fuel injection system includes a housing having a fluid inlet and a fluid outlet, a sealing seat, and a sealing body configured to move between a closed position in which the sealing body is in contact with the sealing seat, which blocks fluid flow from the fluid inlet to the fluid outlet, and additional positions that permit such fluid flow, and a holding device for keeping the sealing body in one of the additional positions if the sealing body is moved at least a specified distance away from the sealing seat.Type: ApplicationFiled: September 29, 2014Publication date: July 28, 2016Applicant: Continental Automotive GmbHInventors: Christoph KLESSE, Tobias RITSCH, Robert WIENCH, Michael WIRKOWSKI
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Patent number: 9382860Abstract: A valve includes a spring having a spring force, an actuator having an actuator force that acts against the spring force, and a tappet that can be actuated by means of the actuator. The valve also includes a sealing element, which is or can be coupled to the tappet, and a sealing seat, such that the valve is closed when the sealing element lies against the sealing seat. A current having a specified curve, proceeding from an initial value of the current to a specified final value of the current, is applied during a specified time interval of the actuator after a closing phase of the valve for a normally open valve or after an opening phase for a normally closed valve. The initial value of the current is less than the final value.Type: GrantFiled: May 3, 2012Date of Patent: July 5, 2016Assignee: CONTINENTAL AUTOMOTIVE GMBHInventors: Christoph Klesse, Thomas Kraft, Hans Riepl, Tobias Ritsch
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Patent number: 9297328Abstract: A fuel injection system of an internal combustion engine includes a first and a second fuel pump, a leakage-prone volume flow regulating valve arranged in a fuel line between the first and the second fuel pump, and a control unit configured to actuate the first fuel pump as a function of a position of the leakage-prone volume flow regulating valve, such that the leakage-prone volume flow regulating valve serves as the sole actuating element for pressure regulation in the fuel injection system. An associated pressure regulating method is also disclosed.Type: GrantFiled: December 20, 2011Date of Patent: March 29, 2016Assignee: CONTINENTAL AUTOMOTIVE GMBHInventors: Christoph Klesse, Hans Riepl, Wolfgang Stapf, Tobias Ritsch, Uwe Lingener
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Publication number: 20150247480Abstract: An internal combustion engine has a pressure accumulator, a high-pressure pump, a controllable actuator, and camshaft. The high-pressure pump includes a pump piston movably arranged in a cylinder chamber. The pump piston is supported on the camshaft and thus influences an open volume of the cylinder chamber depending on a rotation of the camshaft. The cylinder chamber is hydraulically coupled to the pressure accumulator to pump the fluid into the pressure accumulator. The actuator drives the camshaft such that the camshaft rotates about the camshaft's longitudinal axis in a specified angular range. The high-pressure pump is controlled prior to an expected motor start such that the high-pressure pump is in a self-priming operating state and the actuator is controlled such that the camshaft rotates about the camshaft longitudinal axis in the specified angular range at least once in a first direction and at least once in an opposite second direction.Type: ApplicationFiled: October 4, 2013Publication date: September 3, 2015Applicant: CONTINENTAL AUTOMOTIVE GmbHInventors: Michael Wirkowski, Christian Mey, Christoph Klesse
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Publication number: 20150204293Abstract: An injection device for an internal combustion engine includes a fuel delivery pump and a high-pressure pump which are connected to one another via a low-pressure fuel line. A high-pressure accumulator is connected to the high-pressure pump. At least one injector is connected via a high-pressure fuel line to the high-pressure accumulator. The injection device also has at least one fuel return line which is connected to the high-pressure accumulator and/or to the at least one injector. The fuel return line issues into the low-pressure fuel line which connects the fuel delivery pump and the high-pressure pump to one another. At least one air bleed valve is arranged in the course of the low-pressure fuel line or on the high-pressure pump or on a filter housing.Type: ApplicationFiled: July 17, 2013Publication date: July 23, 2015Inventors: Tobias Ritsch, Daniel Anetsberger, Christoph Klesse, Uwe Lingener
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Publication number: 20140196691Abstract: A valve includes a spring having a spring force, an actuator having an actuator force that acts against the spring force, and a tappet that can be actuated by means of the actuator. The valve also includes a sealing element, which is or can be coupled to the tappet, and a sealing seat, such that the valve is closed when the sealing element lies against the sealing seat. A current having a specified curve, proceeding from an initial value of the current to a specified final value of the current, is applied during a specified time interval of the actuator after a closing phase of the valve for a normally open valve or after an opening phase for a normally closed valve. The initial value of the current is less than the final value.Type: ApplicationFiled: May 3, 2012Publication date: July 17, 2014Inventors: Christoph Klesse, Thomas Kraft, Hans Riepl, Tobias Ritsch