Patents by Inventor Tobias Scheller
Tobias Scheller 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: 10953858Abstract: A method for operating a brake system, wherein two switching valves arranged on the suction side of pumps are opened and closed in an alternating manner in order to reduce current consumption.Type: GrantFiled: September 20, 2017Date of Patent: March 23, 2021Inventors: Michael Hitzel, Ulfilas Hoffmann, Tobias Scheller, Daniel Kosshof, Ansgar Hoffmann
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Patent number: 10913437Abstract: A method for operating a dual-circuit hydraulic brake system of a vehicle having an ABS function to feed back pressure medium from low-pressure reservoirs.Type: GrantFiled: August 1, 2017Date of Patent: February 9, 2021Inventors: Andreas Neu, Michael Hitzel, Michael Jung, Tobias Scheller
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Patent number: 10875514Abstract: A method for operating a dual-circuit hydraulic brake system of a vehicle having an ABS function to feed back pressure medium from low-pressure reservoirs.Type: GrantFiled: August 1, 2017Date of Patent: December 29, 2020Inventors: Andreas Neu, Michael Hitzel, Michael Jung, Tobias Scheller
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Publication number: 20190283723Abstract: A method for operating a brake system, wherein two switching valves arranged on the suction side of pumps are opened and closed in an alternating manner in order to reduce current consumption.Type: ApplicationFiled: September 20, 2017Publication date: September 19, 2019Inventors: Michael Hitzel, Ulfilas Hoffmann, Tobias Scheller, Daniel Kosshof, Ansgar Hoffmann
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Publication number: 20190248352Abstract: A method for operating a dual-circuit hydraulic brake system of a vehicle having an ABS function to feed back pressure medium from low-pressure reservoirs.Type: ApplicationFiled: August 1, 2017Publication date: August 15, 2019Inventors: Andreas Neu, Michael Hitzel, Michael Jung, Tobias Scheller
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Publication number: 20160236662Abstract: A method for operating a brake system of a vehicle which includes a master brake cylinder which can be activated by the driver by a brake pedal, at least one driver-independent pressure source, at least one wheel brake to which a wheel speed sensor is assigned, and a brake activation sensor, wherein it is checked whether a hazardous situation is present, and in the case of a hazardous situation being detected the at least one driver-independent pressure source is activated. A hazardous situation is detected when the change in a measured deceleration over time or the absolute value of a measured deceleration exceeds a predefined hazard threshold value and a brake activation operation is detected. In addition, the invention relates to a brake system for a motor vehicle having brake assistance in hazardous situations which does not require a master brake cylinder pressure sensor.Type: ApplicationFiled: July 10, 2014Publication date: August 18, 2016Inventors: Andreas Neu, Thorsten Ullrich, Tobias Scheller, Robert Schmidt, Joachim Borneis, Benjamin Jüstel, Patrick Henke
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Patent number: 8301331Abstract: A method for the calibration or diagnosis of a motor vehicle brake system having a cyclically operated pump. At least one parameter (URPOff), representing the electromotor force of the reference pump, is repeatedly ascertained during operation of a reference pump under defined guidelines. A statistical characteristic variable (URPOff) is derived from the values of parameter (URPOff) ascertained for the reference pump. Parameter (UBPOff) is ascertained under a corresponding guideline during operation of an operating pump. Corresponding statistical characteristic variable (UBPOff) is derived from the values of parameter (UBPOff) ascertained for the operating pump. At least one ratio number is calculated as a measure of the deviation of the operating behavior of the operating pump from the operating behavior of the reference pump from the characteristic variable (URPOff) calculated for the reference pump and the characteristic variable (UBPOff) calculated for the operating pump.Type: GrantFiled: October 22, 2008Date of Patent: October 30, 2012Assignee: Continental Teves AG & Co. oHGInventors: Faouzi Attallah, Tobias Scheller, Tom Robert
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Patent number: 8038228Abstract: In a method for controlling the pressure buildup in an electronically controllable brake system, preferably for use in motor vehicles, including a master brake cylinder, in particular a tandem master brake cylinder (TMC), a vacuum brake booster (booster), at least one additional pressure source for brake force assistance, preferably a hydraulic pump which is drivable by a controlling unit and the pressure of which can be applied to wheel brakes of the vehicle, an approach of a point where the auxiliary-force to actuating-force ratio (operating point) of the vacuum brake booster (booster) falls below a predetermined ratio is detected, that a pressure gradient in the master brake cylinder (TMC pressure gradient) is detected, and that in the event of a detected approach of the operating point of the booster and when a pressure gradient limit value of the detected TMC pressure gradient is exceeded, the additional pressure source is activated for brake force assistance, for the purpose of building up additional brType: GrantFiled: December 17, 2004Date of Patent: October 18, 2011Assignee: Continental Teves AG & Co., OHGInventors: Ralph Gronau, Tobias Scheller, Ralf Revoil, Andreas Neu
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Publication number: 20110184606Abstract: A method for the calibration or diagnosis of a motor vehicle brake system having a cyclically operated pump. At least one parameter (URPOff), representing the electromotor force of the reference pump, is repeatedly ascertained during operation of a reference pump under defined guidelines. A statistical characteristic variable (<URPOff>) is derived from the values of parameter (URPOff) ascertained for the reference pump. Parameter (UBPOff) is ascertained under a corresponding guideline during operation of an operating pump. Corresponding statistical characteristic variable (<UBPOff>) is derived from the values of parameter (UBPOff) ascertained for the operating pump. At least one ratio number is calculated as a measure of the deviation of the operating behavior of the operating pump from the operating behavior of the reference pump from the characteristic variable (<URPOff>) calculated for the reference pump and the characteristic variable (<UBPOff>) calculated for the operating pump.Type: ApplicationFiled: October 22, 2008Publication date: July 28, 2011Applicant: CONTINENTAL TEVES AG & CO. OHGInventors: Faouzi Attallah, Tobias Scheller, Tom Robert
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Patent number: 7267412Abstract: In a method for determining or calibrating the brake control characteristic of a vacuum brake booster of a vehicle brake system, the pressure in the working chamber or the pressure difference between the working chamber and the vacuum chamber of the vacuum brake booster is determined, and either the brake control characteristic is determined on the basis of the determined pressure or pressure difference of the vacuum brake booster, or the stored brake control characteristic is changed according to the determined pressure or pressure difference.Type: GrantFiled: December 3, 2002Date of Patent: September 11, 2007Assignee: Continental Teves AG & Co. oHGInventors: Ralph Gronau, Ralf Reviol, Tobias Scheller, Andreas Neu
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Publication number: 20070164605Abstract: In a method for controlling the pressure buildup in an electronically controllable brake system, preferably for use in motor vehicles, including a master brake cylinder, in particular a tandem master brake cylinder (TMC), a vacuum brake booster (booster), at least one additional pressure source for brake force assistance, preferably a hydraulic pump which is drivable by a controlling unit and the pressure of which can be applied to wheel brakes of the vehicle, an approach of a point where the auxiliary-force to actuating-force ratio (operating point) of the vacuum brake booster (booster) falls below a predetermined ratio is detected, that a pressure gradient in the master brake cylinder (TMC pressure gradient) is detected, and that in the event of a detected approach of the operating point of the booster and when a pressure gradient limit value of the detected TMC pressure gradient is exceeded, the additional pressure source is activated for brake force assistance, for the purpose of building up additional brType: ApplicationFiled: December 17, 2004Publication date: July 19, 2007Inventors: Ralph Gronau, Tobias Scheller, Ralf Reviol, Andreas Neu
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Patent number: 7140699Abstract: The present invention relates to a method for regulating a predetermined modifiable brake pressure in the wheel brakes of a brake system, wherein input quantities determining the brake pressure in the individual wheel brakes are evaluated and correcting variables of hydraulic valves are defined in a control and/or data processing system. To obviate the need for additional pressure sensors which register the pressure in the wheel brakes, it is arranged for by the invention that a characteristic curve is stored in the control or data processing system, said curve correlating the valve characteristics of the hydraulic valve with a pressure difference of the hydraulic valve, and the correcting variable of the hydraulic valve is defined according to the characteristic curve.Type: GrantFiled: February 13, 2003Date of Patent: November 28, 2006Assignee: Continental Teves AG & Co. oHGInventors: Ralph Gronau, Tobias Scheller, Ralf Reviol, Andreas Neu
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Patent number: 7080890Abstract: In a method for improving the operation of a hydraulic vehicle brake system with an active hydraulic brake boost, wherein a pressure fluid volume flow between a master brake cylinder and the wheel brakes of the vehicle is controlled by means of an analog or analogized separating valve, and wherein a hydraulic pressure is determined in the master brake cylinder, an increase of the hydraulic pressure in the master brake cylinder is monitored and/or controlled on the basis of the hydraulic pressure determined in the master brake cylinder in a transition of the separating valve from a closed switch position to an open switch position.Type: GrantFiled: December 3, 2002Date of Patent: July 25, 2006Assignee: Continental Teves AG & Co. oHGInventors: Tobias Scheller, Ralf Reviol, Ralph Gronau, Andreas Neu
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Publication number: 20050168061Abstract: In a method for improving the operation of a hydraulic vehicle brake system with an active hydraulic brake boost, wherein a pressure fluid volume flow between a master brake cylinder and the wheel brakes of the vehicle is controlled by means of an analog or analogized separating valve, and wherein a hydraulic pressure is determined in the master brake cylinder, an increase of the hydraulic pressure in the master brake cylinder is monitored and/or controlled on the basis of the hydraulic pressure determined in the master brake cylinder in a transition of the separating valve from a closed switch position to an open switch position.Type: ApplicationFiled: December 3, 2002Publication date: August 4, 2005Inventors: Tobias Scheller, Ralf Reviol, Ralph Gronau, Andreas Neu
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Publication number: 20050156465Abstract: In a method for determining or calibrating the brake control characteristic of a vacuum brake booster of a vehicle brake system, the pressure in the working chamber or the pressure difference between the working chamber and the vacuum chamber of the vacuum brake booster is determined, and either the brake control characteristic is determined on the basis of the determined pressure or pressure difference of the vacuum brake booster, or the stored brake control characteristic is changed according to the determined pressure or pressure difference.Type: ApplicationFiled: December 3, 2002Publication date: July 21, 2005Applicant: Continental Teves AG & Co. oHGInventors: Ralph Gronau, Ralf Reviol, Tobias Scheller, Andreas Neu
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Publication number: 20050082905Abstract: The present invention relates to a method for regulating a predetermined modifiable brake pressure in the wheel brakes of a brake system, wherein input quantities determining the brake pressure in the individual wheel brakes are evaluated and correcting variables of hydraulic valves are defined in a control and/or data processing system. To obviate the need for additional pressure sensors which register the pressure in the wheel brakes, it is arranged for by the invention that a characteristic curve is stored in the control or data processing system, said curve correlating the valve characteristics of the hydraulic valve with a pressure difference of the hydraulic valve, and the correcting variable of the hydraulic valve is defined according to the characteristic curve.Type: ApplicationFiled: February 13, 2003Publication date: April 21, 2005Inventors: Ralph Gronau, Tobias Scheller, Ralf Reviol, Andreas Neu
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Publication number: 20040237638Abstract: A method for testing a current regulator of an electronically controllable valve in a hydraulic vehicle brake system, the current regulator is tested by way of actuation with a testing current which is sufficiently small such that essentially there is no valve movement of the electronically controllable valve, with the result that no substantial hydraulic effect is produced on the vehicle brake system.Type: ApplicationFiled: February 11, 2004Publication date: December 2, 2004Inventors: Ralf Reviol, Ralph Gronau, Tobias Scheller, Andreas Neu
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Publication number: 20040243290Abstract: The invention relates to a method for determining a fault in or failure of a hydraulic pressure sensor or hydraulic brake circuit in a hydraulic vehicle brake system with a vacuum brake booster, with a fault in or failure of a hydraulic pressure sensor or hydraulic brake circuit being determined on the basis of a comparison between a hydraulic pressure or variables derived therefrom and the vacuum situation or point of maximum boosting of the vacuum brake booster or variables derived therefrom.Type: ApplicationFiled: February 11, 2004Publication date: December 2, 2004Inventors: Robert Schmidt, Ralf Reviol, Ralph Gronau, Tobias Scheller, Andreas Neu
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Publication number: 20040150262Abstract: The present invention relates to a method of actuating a braking device for motor vehicles with electrically controlled hydraulic valves and a hydraulic pump, in which one or more existing valve coils necessary for hydraulic controlling functions are actuated for the purpose of electrically heating one or more support members accommodating these coils, for longer periods of time than is necessary for the control function and/or in periods in which it is not necessary for the control function, wherein at least one first heating period is carried out, and with the heating period comprising a first heating pulse followed by a heating pause and at least one further heating pulse.Type: ApplicationFiled: February 26, 2004Publication date: August 5, 2004Inventors: Ralph Gronau, Tobias Scheller, Ralf Reviol
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Patent number: 6499812Abstract: A method of brake pressure adjustment in a vehicle brake system equipped with an electric hydraulic pump comprises the following steps: detecting a prevailing brake pressure or determining a nominal pressure, and actuating the pump by degrees according to the detected brake pressure or the nominal pressure. In a method of opening an inlet valve of a hydraulic vehicle brake system, a pressure rise on the inlet side of the inlet valve is generated when the difference between the outlet-side and the inlet-side pressure on the inlet valve exceeds a positive threshold value.Type: GrantFiled: April 12, 2001Date of Patent: December 31, 2002Assignee: Continental Teves AG & Co., OHGInventors: Ralph Gronau, Tobias Scheller, Jürgen Woywod