Patents by Inventor Tobias Ritsch
Tobias Ritsch 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: 11448149Abstract: Disclosed is a method and a device for predicting the failure time of the pressure limiting valve of a high-pressure fuel pump of a motor vehicle. The method includes measuring a characteristic parameter of the pressure limiting valve each time the motor vehicle has been switched off, determining and storing a variable determined by using the measured characteristic parameter, determining the time profile of the variable determined from the characteristic parameter, predicting the future profile of the variable determined from the characteristic parameter, and comparing the predicted future profile of the variable determined from the characteristic parameter with a predetermined wear limiting value. The comparison is to predict the time at which the predicted future profile of the variable determined from the characteristic parameter reaches the predetermined wear limiting value.Type: GrantFiled: June 11, 2020Date of Patent: September 20, 2022Assignee: Vitesco Technologies GmbHInventors: Michael Wirkowski, Tobias Ritsch, Claus Stephani
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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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Publication number: 20200309052Abstract: Disclosed is a method and a device for predicting the failure time of the pressure limiting valve of a high-pressure fuel pump of a motor vehicle. The method includes measuring a characteristic parameter of the pressure limiting valve each time the motor vehicle has been switched off, determining and storing a variable determined by using the measured characteristic parameter, determining the time profile of the variable determined from the characteristic parameter, predicting the future profile of the variable determined from the characteristic parameter, and comparing the predicted future profile of the variable determined from the characteristic parameter with a predetermined wear limiting value. The comparison is to predict the time at which the predicted future profile of the variable determined from the characteristic parameter reaches the predetermined wear limiting value.Type: ApplicationFiled: June 11, 2020Publication date: October 1, 2020Applicant: Vitesco Technologies GMBHInventors: Michael Wirkowski, Tobias Ritsch, Claus Stephani
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Patent number: 10781766Abstract: Embodiments relate to an operating method for operating a fuel injection system of an internal combustion engine, wherein, upon a detection of a fault in the fuel injection system, and wherein a predefined pressure is overshot in a high-pressure region of the fuel injection system, an overrun mode of the internal combustion engine is deactivated, such that the internal combustion engine is operated exclusively in an injection mode.Type: GrantFiled: February 18, 2018Date of Patent: September 22, 2020Assignee: Vitesco Technologies GmbHInventors: Oliver Seegmüller, Tobias Ritsch
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Patent number: 10662889Abstract: The disclosure relates to a control method for controlling at least one injector valve in a fuel injection system of an internal combustion engine. An opening time of the injector valve is selected such that, in a fault situation in the fuel injection system, an opening time of the injector valve is situated in a pressure valley of a pressure oscillation prevailing in a high-pressure region of the fuel injection system.Type: GrantFiled: February 18, 2018Date of Patent: May 26, 2020Assignee: Vitesco Technologies GmbHInventors: Tobias Ritsch, Heiko Zabich, Matthias Bauer
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Patent number: 10337439Abstract: The invention relates to a control method for controlling a fuel injection system (10) of an internal combustion engine, wherein, wherein, in a fault situation of the fuel injection system (10), a camshaft angle of a camshaft (34) which drives a pump piston (32) of a high-pressure fuel pump (14) of the fuel injection system (10) is adjusted such that an injection time (tI) of injector valve (42) which injects the fuel from the fuel injection system (10) into a combustion chamber of the internal combustion engine lies in a pressure trough (50) of a pressure oscillation in a high-pressure region (16).Type: GrantFiled: April 14, 2016Date of Patent: July 2, 2019Assignee: CPT Group GmbHInventors: Oliver Seegmüller, 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: 20180238260Abstract: The invention relates to a control method for controlling a fuel injection system (10) of an internal combustion engine, wherein, wherein, in a fault situation of the fuel injection system (10), a camshaft angle of a camshaft (34) which drives a pump piston (32) of a high-pressure fuel pump (14) of the fuel injection system (10) is adjusted such that an injection time (tI) of injector valve (42) which injects the fuel from the fuel injection system (10) into a combustion chamber of the internal combustion engine lies in a pressure trough (50) of a pressure oscillation in a high-pressure region (16).Type: ApplicationFiled: April 14, 2016Publication date: August 23, 2018Applicant: CONTINENTAL AUTOMOTIVE GMBHInventors: Oliver Seegmüller, Tobias Ritsch
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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: 20180179983Abstract: The disclosure relates to a control method for controlling at least one injector valve in a fuel injection system of an internal combustion engine. An opening time of the injector valve is selected such that, in a fault situation in the fuel injection system, an opening time of the injector valve is situated in a pressure valley of a pressure oscillation prevailing in a high-pressure region of the fuel injection system.Type: ApplicationFiled: February 18, 2018Publication date: June 28, 2018Applicant: CONTINENTAL AUTOMOTIVE GMBHInventors: Tobias Ritsch, Heiko Zabich, Matthias Bauer
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Publication number: 20180171923Abstract: Embodiments relate to an operating method for operating a fuel injection system of an internal combustion engine, wherein, upon a detection of a fault in the fuel injection system, and wherein a predefined pressure is overshot in a high-pressure region of the fuel injection system, an overrun mode of the internal combustion engine is deactivated, such that the internal combustion engine is operated exclusively in an injection mode.Type: ApplicationFiled: February 18, 2018Publication date: June 21, 2018Applicant: CONTINENTAL AUTOMOTIVE GMBHInventors: Oliver Seegmüller, 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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Patent number: 9739209Abstract: A method for operating a fuel injection system of an internal combustion engine is disclosed. The fuel injection system comprises a high pressure accumulator (rail) and a high-pressure fuel pump with a digital inlet valve and which guides fuel into the high pressure accumulator. The number of the control pulses for the digital inlet valve and thus the number of the pump delivery strokes is reduced with respect to the number of the injection steps of an injector of the injection system, in order to thereby reduce the noise and the energy consumption of the high-pressure pump.Type: GrantFiled: June 16, 2014Date of Patent: August 22, 2017Assignee: CONTINENTAL AUTOMOTIVE GMBHInventors: Hans Riepl, 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