Patents by Inventor Andrej Gardt
Andrej Gardt 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: 11746915Abstract: The disclosure relates to a valve assembly, comprising a valve body, in which a fluid channel is formed that connects a fluid inlet to a fluid outlet, wherein a preload force is applied to a closing body, which is movably mounted in the fluid channel, in the direction of a valve seat formed in the valve body, a fluid force acting on the closing body against the preload force in order to open the valve seat. The closing body is guided axially and/or radially by at least one guide ball, the guide ball being arranged between the closing body and a lateral boundary of the fluid channel.Type: GrantFiled: February 7, 2020Date of Patent: September 5, 2023Assignee: Robert Bosch GmbHInventors: Andreas Lechler, Wolf Stahr, Patrick Schellnegger, Joern Kreutzer, Christoph Eisele, Andrej Gardt, Marcus Biehler, Michael Kloss, Felix Schorn
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Publication number: 20220178455Abstract: The disclosure relates to a valve assembly, comprising a valve body, in which a fluid channel is formed that connects a fluid inlet to a fluid outlet, wherein a preload force is applied to a closing body, which is movably mounted in the fluid channel, in the direction of a valve seat formed in the valve body, a fluid force acting on the closing body against the preload force in order to open the valve seat. The closing body is guided axially and/or radially by at least one guide ball, the guide ball being arranged between the closing body and a lateral boundary of the fluid channel.Type: ApplicationFiled: February 7, 2020Publication date: June 9, 2022Inventors: Andreas Lechler, Wolf Stahr, Patrick Schellnegger, Joern Kreutzer, Christoph Eisele, Andrej Gardt, Marcus Biehler, Michael Kloss, Felix Schorn
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Patent number: 11161490Abstract: A valve assembly, for controlling a fluidic connection between a brake master cylinder and a pedal simulator of a brake system of a motor vehicle, includes a first control valve and a second control valve, the second control vale being positioned between the first control valve and a pedal simulator and including first and second flow controllers to control flow volumes of hydraulic fluid that differ between first and second flow directions.Type: GrantFiled: October 5, 2017Date of Patent: November 2, 2021Assignee: Robert Bosch GmbHInventors: Andrej Gardt, Christoph Eisele, Valentin Schubitschew, Volker Edelmann
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Patent number: 11149596Abstract: A valve for variable throttling of a hydraulic flow includes a tappet and a guide element in which the tappet is guided for movement in a stroke direction. The valve also includes at least one fatigue-resistant, mechanical member that locally reduces a radial play of the tappet so as to reduce possible valve oscillations.Type: GrantFiled: May 31, 2020Date of Patent: October 19, 2021Assignee: Robert Bosch GmbHInventors: Andreas Lechler, Andrej Gardt, Christoph Eisele, Edgar Kurz, Felix Schorn, Joern Kreutzer, Marcus Biehler, Michael Kloss, Patrick Schellnegger, Wolf Stahr
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Patent number: 11072315Abstract: A valve for adjusting a fluid flow includes a valve cartridge with at least one first fluid opening, at least one second fluid opening, a preliminary stage with a first valve seat and a first closing element, and a main stage with a second valve seat and a second closing element. The first valve seat is at a first axial through-opening of the second closing element, which is at least partly in a preliminary stage sleeve. The first valve seat is within the preliminary stage sleeve, and a flow path from the at least one first fluid opening to the preliminary stage leads through at least one inflow opening, which is radially introduced in the preliminary stage sleeve. An axial filter gap formed between an actuation element and the preliminary stage sleeve overlaps the at least one inflow opening at least in some regions and together form a filter.Type: GrantFiled: March 15, 2018Date of Patent: July 27, 2021Assignee: Robert Bosch GmbHInventors: Volker Edelmann, Andrej Gardt, Guenther Schnalzger, Valentin Schubitschew, Christoph Eisele
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Patent number: 11007991Abstract: A device for controlling a solenoid valve that controls the through-flow of a medium in a closed-loop manner includes a control procedure implemented by the device. The control procedure is configured at least in regions as a ramp function. The ramp starts with a ramp start current intensity that is less than an opening start current intensity of the valve at which the valve starts to open. The ramp ends with a ramp end current intensity that is greater than an opening end current intensity at which the valve is fully open. The device is configured to one or more of determine and adjust an amount of the ramp start current intensity in dependence upon a pressure. The amount determined and/or adjusted takes into consideration a pressure of the medium against which the solenoid valve opens.Type: GrantFiled: August 28, 2018Date of Patent: May 18, 2021Assignee: Robert Bosch GmbHInventors: Andrej Gardt, Valentin Schubitschew, Volker Edelmann
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Publication number: 20210101573Abstract: A valve for adjusting a fluid flow includes a valve cartridge with at least one first fluid opening, at least one second fluid opening, a preliminary stage with a first valve seat and a first closing element, and a main stage with a second valve seat and a second closing element. The first valve seat is at a first axial through-opening of the second closing element, which is at least partly in a preliminary stage sleeve. The first valve seat is within the preliminary stage sleeve, and a flow path from the at least one first fluid opening to the preliminary stage leads through at least one inflow opening, which is radially introduced in the preliminary stage sleeve. An axial filter gap formed between an actuation element and the preliminary stage sleeve overlaps the at least one inflow opening at least in some regions and together form a filter.Type: ApplicationFiled: March 15, 2018Publication date: April 8, 2021Inventors: Volker Edelmann, Andrej Gardt, Guenther Schnalzger, Valentin Schubitschew, Christoph Eisele
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Patent number: 10882502Abstract: A method is described for determining a control signal for a controllable pressure medium control valve of an electronically slip-controllable power braking system. The underlying power braking system is equipped with an actuating unit including a displaceable actuating element, the displacement of the actuating element determining a throughput of pressure medium through the pressure medium control valve. In the opened state, the pressure medium flowing through the pressure medium control valve causes flow forces on a valve closing element. Under certain circumstances, these flow forces have a closing effect on the valve closing element, thus throttling the possible pressure medium throughput, and cause undesirably high pressure differences in the interior of the pressure medium control valve. To avoid these effects, it is provided that the pressure medium control valve be controlled using a control signal dependent on the speed of an actuation of the actuating element.Type: GrantFiled: April 10, 2019Date of Patent: January 5, 2021Assignee: Robert Bosch GmbHInventors: Andrej Gardt, Christoph Eisele, Valentin Schubitschew, Volker Edelmann
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Publication number: 20200400045Abstract: A valve for variable throttling of a hydraulic flow includes a tappet and a guide element in which the tappet is guided for movement in a stroke direction. The valve also includes at least one fatigue-resistant, mechanical member that locally reduces a radial play of the tappet so as to reduce possible valve oscillations.Type: ApplicationFiled: May 31, 2020Publication date: December 24, 2020Inventors: Andreas Lechler, Andrej Gardt, Christoph Eisele, Edgar Kurz, Felix Schorn, Joern Kreutzer, Marcus Biehler, Michael Kloss, Patrick Schellnegger, Wolf Stahr
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Patent number: 10754356Abstract: A method for actuating at least one solenoid valve includes detecting a valve actuation signal, energizing the at least one solenoid valve with a specific constant control current for a specific actuation time which follows the detection of the valve actuation signal, and increasing the control current to a full actuation current for a full actuation time which follows the actuation time. The specific constant control current and the actuation time are dimensioned in such a way that at least two different types of solenoid valves can be at least partially opened by the control current during the actuation time.Type: GrantFiled: April 12, 2018Date of Patent: August 25, 2020Assignee: Robert Bosch GmbHInventors: Andrej Gardt, Christoph Eisele, Valentin Schubitschew, Volker Edelmann
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Patent number: 10737211Abstract: A pressure medium unit, in particular for setting and/or regulating a brake pressure in a vehicle brake system having electronic slip regulation, and to a cap-shaped filter element. Pressure medium units are equipped with a housing block having a duct formed therein that conducts pressure medium, a control element that controls a cross-section of the duct, and a filter element assigned to the control element and fixed in the interior of the duct. According to the present system, the filter element is formed in the shape of a cap, and has on its outer circumference a radially protruding fixing segment having an elastically deformable cross-section. A fixing segment realized in this manner compensates differences in expansion between the components caused by changes in temperature, prevents play at the filter element, and provides a particularly good filter effect.Type: GrantFiled: August 2, 2018Date of Patent: August 11, 2020Assignee: Robert Bosch GmbHInventors: Valentin Schubitschew, Andrej Gardt, Volker Edelmann
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Patent number: 10593458Abstract: A method for actuating an electromagnetic valve in a fluid system includes, for a specified first time period, a switching current with a specified first amplitude is applied, the switching current switching the electromagnetic valve from a rest state into a switching state. After the specified first time period expires, a holding current with a specified second amplitude is applied, the holding current holding the electromagnetic valve in the switching state. The first amplitude of the first switching current is greater than the second amplitude of the holding current.Type: GrantFiled: August 30, 2016Date of Patent: March 17, 2020Assignee: Robert Bosch GmbHInventors: Bjoern-Michael Mueller, Ulrich Blankenhorn, Volker Edelmann, Manfred Maerz, Andrej Gardt, Valentin Schubitschew
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Publication number: 20190315328Abstract: A method is described for determining a control signal for a controllable pressure medium control valve of an electronically slip-controllable power braking system. The underlying power braking system is equipped with an actuating unit including a displaceable actuating element, the displacement of the actuating element determining a throughput of pressure medium through the pressure medium control valve. In the opened state, the pressure medium flowing through the pressure medium control valve causes flow forces on a valve closing element. Under certain circumstances, these flow forces have a closing effect on the valve closing element, thus throttling the possible pressure medium throughput, and cause undesirably high pressure differences in the interior of the pressure medium control valve. To avoid these effects, it is provided that the pressure medium control valve be controlled using a control signal dependent on the speed of an actuation of the actuating element.Type: ApplicationFiled: April 10, 2019Publication date: October 17, 2019Inventors: Andrej Gardt, Christoph Eisele, Valentin Schubitschew, Volker Edelmann
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Publication number: 20190263370Abstract: A valve assembly, for controlling a fluidic connection between a brake master cylinder and a pedal simulator of a brake system of a motor vehicle, includes a first control valve and a second control valve, the second control vale being positioned between the first control valve and a pedal simulator and including first and second flow controllers to control flow volumes of hydraulic fluid that differ between first and second flow directions.Type: ApplicationFiled: October 5, 2017Publication date: August 29, 2019Applicant: Robert Bosch GmbHInventors: Andrej Gardt, Christoph Eisele, Valentin Schubitschew, Volker Edelmann
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Patent number: 10288186Abstract: The disclosure relates to an apparatus and a method for driving a solenoid valve. The apparatus comprises a PWM apparatus, an evaluation and control unit, and a current measuring apparatus The evaluation and control unit is configured to: in a test operation, generate and emit test PWM signals having test duty ratios, the test PWM signals inducing test currents through a magnet assembly of the solenoid valve that are below a response threshold that triggers a switching process of the solenoid valve; derive presently prevailing ambient conditions of the test operation from the test PWM signals and the induced test currents; and in a normal operation generate and emit a PWM signal based on the presently prevailing ambient conditions of the test operation, the PWM signal inducing a current that is above the response threshold and switches the solenoid valve.Type: GrantFiled: December 14, 2017Date of Patent: May 14, 2019Assignee: Robert Bosch GmbHInventors: Andrej Gardt, Christoph Eisele, Valentin Schubitschew, Volker Edelmann
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Publication number: 20190077387Abstract: A device for controlling a solenoid valve that controls the through-flow of a medium in a closed-loop manner includes a control procedure implemented by the device. The control procedure is configured at least in regions as a ramp function. The ramp starts with a ramp start current intensity that is less than an opening start current intensity of the valve at which the valve starts to open. The ramp ends with a ramp end current intensity that is greater than an opening end current intensity at which the valve is fully open. The device is configured to one or more of determine and adjust an amount of the ramp start current intensity in dependence upon a pressure. The amount determined and/or adjusted takes into consideration a pressure of the medium against which the solenoid valve opens.Type: ApplicationFiled: August 28, 2018Publication date: March 14, 2019Inventors: Andrej Gardt, Valentin Schubitschew, Volker Edelmann
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Publication number: 20190047534Abstract: A pressure medium unit, in particular for setting and/or regulating a brake pressure in a vehicle brake system having electronic slip regulation, and to a cap-shaped filter element. Pressure medium units are equipped with a housing block having a duct formed therein that conducts pressure medium, a control element that controls a cross-section of the duct, and a filter element assigned to the control element and fixed in the interior of the duct. According to the present system, the filter element is formed in the shape of a cap, and has on its outer circumference a radially protruding fixing segment having an elastically deformable cross-section. A fixing segment realized in this manner compensates differences in expansion between the components caused by changes in temperature, prevents play at the filter element, and provides a particularly good filter effect.Type: ApplicationFiled: August 2, 2018Publication date: February 14, 2019Inventors: Valentin Schubitschew, Andrej Gardt, Volker Edelmann
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Publication number: 20180321695Abstract: A method for actuating at least one solenoid valve includes detecting a valve actuation signal, energizing the at least one solenoid valve with a specific constant control current for a specific actuation time which follows the detection of the valve actuation signal, and increasing the control current to a full actuation current for a full actuation time which follows the actuation time. The specific constant control current and the actuation time are dimensioned in such a way that at least two different types of solenoid valves can be at least partially opened by the control current during the actuation time.Type: ApplicationFiled: April 12, 2018Publication date: November 8, 2018Inventors: Andrej Gardt, Christoph Eisele, Valentin Schubitschew, Volker Edelmann
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Publication number: 20180254134Abstract: A method for actuating an electromagnetic valve in a fluid system includes, for a specified first time period, a switching current with a specified first amplitude is applied, the switching current switching the electromagnetic valve from a rest state into a switching state. After the specified first time period expires, a holding current with a specified second amplitude is applied, the holding current holding the electromagnetic valve in the switching state. The first amplitude of the first switching current is greater than the second amplitude of the holding current.Type: ApplicationFiled: August 30, 2016Publication date: September 6, 2018Inventors: Bjoern-Michael Mueller, Ulrich Blankenhorn, Volker Edelmann, Manfred Maerz, Andrej Gardt, Valentin Schubitschew
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Publication number: 20180172174Abstract: The invention relates to an apparatus (1) and a method for driving a solenoid valve (3), having an evaluation and control unit (10), a PWM apparatus (20) and a current measuring apparatus (AM), wherein, in normal operation, the evaluation and control unit (10) generates a PWM signal (PWM) having a duty ratio (TV) and emits said PWM signal to a magnet assembly (3.1) of the solenoid valve (3) by means of the PWM apparatus (20), wherein the current measuring apparatus (AM) detects a current (I) through the magnet assembly (3.1) resulting from the PWM signal (PWM) and reports said current back to the evaluation and control circuit (10), wherein a current (I) that is above a response threshold of the magnet assembly (3.Type: ApplicationFiled: December 14, 2017Publication date: June 21, 2018Inventors: Andrej Gardt, Christoph Eisele, Valentin Schubitschew, Volker Edelmann