Patents by Inventor Ulf Friesen
Ulf Friesen 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: 8276995Abstract: A control unit for a rail vehicle, comprising a braking control unit that contains an electronic braking control device for emitting control commands to brake actuators and/or comprising an anti-skid device, which controls the wheel slip of the wheels of at least one axle in accordance with at least one rotational speed signal from an anti-skid sensor. The control unit also comprises a roll monitoring unit with an electronic roll monitoring control device and at least one roll monitoring sensor for detecting the rotational speed of at least some wheels in the form of a rotational speed signal, and comprises a rolling gear monitoring unit for monitoring and/or diagnosing critical conditions of and damage to the rolling gear. The monitoring unit comprises an electronic control device for monitoring the rolling gear.Type: GrantFiled: February 28, 2006Date of Patent: October 2, 2012Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbHInventors: Stefan Aurich, Johannes Schuhmacher, Jörg-Johannes Wach, Ulf Friesen
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Publication number: 20120209471Abstract: A method for monitoring the driving behavior of a railway vehicle, wherein at least one measurement variable characterizing the vibrational behavior of at least one wheel set of the railway vehicle, is captured by at least one sensor providing a corresponding measurement signal. The method includes the steps of identifying at least one significant event or a combination of multiple significant events within the time trace of the measurement signal and identifying the event time at which the significant event took place, deriving the frequency from the time trace of the measurement signal starting from the event time, comparing the derived frequency to at least one stored reference frequency, evaluating the vibrational behavior of the wheel set as a function of the deviation of the derived frequency from the at least one stored reference frequency.Type: ApplicationFiled: September 14, 2010Publication date: August 16, 2012Applicant: KNORR-BREMSE SYSTEME FUR SCHIENENFAHRZEUGE GMBHInventors: Frank Günther, Jörg-Johannes Wach, Ulf Friesen, Stefan Sedlmair
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Patent number: 8234917Abstract: The invention relates to a device for monitoring errors in undercarriage components of rail vehicles, having at least one acceleration sensor which works with an evaluation unit. At least one acceleration sensor is arranged on the undercarriage of the rail vehicle in such a manner that its direction of detection has at least one component parallel to the vertical axis (z-direction) of the rail vehicle. The invention proposes that the acceleration sensor is constructed in such a manner that it delivers a measuring signal which contains the signal portion corresponding to a ground acceleration, or represents a signal corresponding to a ground acceleration, and that the evaluation unit has a routine for testing functions of the acceleration sensor, the routine controlling an error signal if the measuring signal delivered by the acceleration sensor contains no signal portion corresponding to a ground acceleration. The routine also suppresses the error signal if this is not the case.Type: GrantFiled: May 16, 2008Date of Patent: August 7, 2012Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbHInventors: Thomas Burkhart, Ulf Friesen
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Publication number: 20120197483Abstract: A method for monitoring the state of components of a railway vehicle, wherein sensors for capturing loads acting on the components are operated, the measurement values thereof are fed as input values to an analysis unit for analyzing the wear state, wherein the current position of the railway vehicle is processed as a signal to this end, wherein the current velocity of the railway vehicle is recorded over time, from which a v-t profile is generated and compared to a stored v-t profile in order to determine the current position as a further input value for monitoring the state by stochastically comparing both profiles.Type: ApplicationFiled: August 6, 2010Publication date: August 2, 2012Applicant: KNORR-BREMSE SYSTEME FÜR SCHIENENFAHRZEUGE GMBHInventors: Marc-Oliver Herden, Ulf Friesen, Michael Amft
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Publication number: 20120193484Abstract: A method for estimating the temperature (TB, est) of a wheel bearing of a wheelset of a rail vehicle by means of a calculation model (Tbearingestimator). The calculation model (Tbearing,estimator) estimates the temperature of the axle bearing, according to the speed (vtrain) and the ambient temperature (Tamb) of the rail vehicle as input variables of the calculation model (Tbearing estimator), and the temperature of a component of the wheelset, different from the axle bearing but directly or indirectly connected to the axle bearing in a heat-conducting manner, is measured as the measuring temperature (Tmeas) during operation. The temperature of the component different from the axle bearing is estimated by means of the calculation model (Tbearingestimator) as the estimated temperature (Tmeas,est).Type: ApplicationFiled: September 9, 2010Publication date: August 2, 2012Applicant: KNORR-BREMSE SYSTEME FUR SCHIENENFAHRZEUGE GMBHInventors: Ralf Furtwängler, Ulf Friesen
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Publication number: 20120197505Abstract: A method for predicting the temperature (Tin,p) of a wheel bearing of a vehicle wheel for a future moment (t+?tp) in relation to a present moment (t) or for a future time interval (t, t+?tp) in relation to a present moment (t), on the basis of a course of the temperature (Tin) of the wheel bearing in a past time interval (t??tb, t) in relation to the present moment (t), the predicted temperature (Tin,p) of the wheel bearing being determined from the sum of the temperature (Tin) of the wheel bearing at the present moment (t) and a corrective value (?TP) which is determined according to a change in at least one driving condition, such as the speed (?Vtrain), and a change in the temperature (?Tb) of the wheel bearing within the past time interval (t??tb, t).Type: ApplicationFiled: September 9, 2010Publication date: August 2, 2012Applicant: KNORR-BREMSE SYSTEME FÜR SCHIENENFAHRZEUGE GMBHInventors: Ulf Friesen, Ralf Furtwängler
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Patent number: 8179063Abstract: The invention relates to a traction drive for the driving and generative braking of a rail vehicle or a combination of rail vehicles, a permanent-field synchronous motor and a traction current converter being respectively associated with at least two axles of the rail vehicle or combination of rail vehicles. The traction current converter includes at least one pulse current converter on the engine side, and the clamps of the permanent-field synchronous motor are connected to a change-over switch such that the permanent-field synchronous motor can be connected to a load circuit containing at least one load element, in order to drive the pulse current converter or for generative braking.Type: GrantFiled: October 25, 2007Date of Patent: May 15, 2012Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbHInventors: Falk Hähle, Ulf Friesen
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Patent number: 8076878Abstract: The invention relates to a traction drive for the driving and generative braking of a rail vehicle or a combination of rail vehicles, at least one permanent-field synchronous motor and a traction current converter being associated with at least one axle of the rail vehicle or combination of rail vehicles. The traction current converter includes at least one pulse current converter on the engine side, and the clamps of the permanent-field synchronous motor are connected to a change-over switch such that the permanent-field synchronous motor can be connected to a load circuit forming a load, to drive the pulse current converter or for generative braking. According to the invention, the load circuit connected to the permanent-field synchronous motor for generative braking is designed and/or controlled in such a way that the characteristic values of the load circuit can be modified according to the loading of the rail vehicle or combination of rail vehicles.Type: GrantFiled: October 25, 2007Date of Patent: December 13, 2011Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbHInventors: Falk Hähle, Ulf Friesen, Josef Schmucker
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Publication number: 20100116041Abstract: The invention relates to a device for the error monitoring of chassis components of rail vehicles, including at least one vibration sensor. According to one embodiment of the invention, at least one vibration sensor is arranged on a bogie frame or on a wheel set bearing of an axis of a bogie of the rail vehicle such that the detection direction thereof has a component in the moving direction (x-direction) or a component perpendicular to the moving direction (y-direction) and at the same time a component parallel to the vertical axis (z-direction) of the rail vehicle.Type: ApplicationFiled: May 16, 2008Publication date: May 13, 2010Applicant: KNORR-BREMSE SYSTEME FÜR SCHIENENFAHRZEUGE GMBHInventors: Jörg Johannes Wach, Johannes Schuhmacher, Marc Oliver Herden, Reinhold Mayer, Ulf Friesen
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Publication number: 20100078527Abstract: The invention relates to a device for monitoring errors in undercarriage components of rail vehicles, having at least one acceleration sensor which works with an evaluation unit. At least one acceleration sensor is arranged on the undercarriage of the rail vehicle in such a manner that its direction of detection has at least one component parallel to the vertical axis (z-direction) of the rail vehicle. The invention proposes that the acceleration sensor is constructed in such a manner that it delivers a measuring signal which contains the signal portion corresponding to a ground acceleration, or represents a signal corresponding to a ground acceleration, and that the evaluation unit has a routine for testing functions of the acceleration sensor, the routine controlling an error signal if the measuring signal delivered by the acceleration sensor contains no signal portion corresponding to a ground acceleration. The routine also suppresses the error signal if this is not the case.Type: ApplicationFiled: May 16, 2008Publication date: April 1, 2010Applicant: KNORR-BREMSE SYSTEME FOR SCHIENENFAHRZEUGE GMBHInventors: Thomas Burkhart, Ulf Friesen
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Publication number: 20100066281Abstract: The invention relates to a traction drive for the driving and generative braking of a rail vehicle or a combination of rail vehicles, a permanent-field synchronous motor and a traction current converter being respectively associated with at least two axles of the rail vehicle or combination of rail vehicles. The traction current converter includes at least one pulse current converter on the engine side, and the clamps of the permanent-field synchronous motor are connected to a change-over switch such that the permanent-field synchronous motor can be connected to a load circuit containing at least one load element, in order to drive the pulse current converter or for generative braking.Type: ApplicationFiled: October 25, 2007Publication date: March 18, 2010Applicant: KNORR-BREMSE SYSTEME FUR SCHIENEFAHRZEUGE GMBHInventors: Falk Hähle, Ulf Friesen
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Publication number: 20100066282Abstract: The invention relates to a traction drive for the driving and generative braking of a rail vehicle or a combination of rail vehicles, at least one permanent-field synchronous motor and a traction current converter being associated with at least one axle of the rail vehicle or combination of rail vehicles. The traction current converter includes at least one pulse current converter on the engine side, and the clamps of the permanent-field synchronous motor are connected to a change-over switch such that the permanent-field synchronous motor can be connected to a load circuit forming a load, to drive the pulse current converter or for generative braking. According to the invention, the load circuit connected to the permanent-field synchronous motor for generative braking is designed and/or controlled in such a way that the characteristic values of the load circuit can be modified according to the loading of the rail vehicle or combination of rail vehicles.Type: ApplicationFiled: October 25, 2007Publication date: March 18, 2010Applicant: KNORR-BREMSE SYSTEME FUR SCHIENENFAHRZEUGE GMBHInventors: Falk Hähle, Ulf Friesen, Josef Schmucker
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Patent number: 7438163Abstract: The invention relates to a brake application device for vehicles, in particular rail vehicles, comprising a unit for emergency release and a unit for auxiliary release. The release units are integrated into a combined device for emergency and auxiliary release of the brakes. The combined device is electrically actuated by a common drive unit.Type: GrantFiled: March 31, 2003Date of Patent: October 21, 2008Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbHInventors: Erich Fuderer, Peter Wolfsteiner, Ulf Friesen, Manfred Vohla
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Patent number: 7419035Abstract: A brake application device for vehicles, especially for rail vehicles, comprising a wear-adjusting device which is embodied in a brake actuator and comprises a helical gear which is provided with a threaded spindle and a nut as screw connection parts, said nut being screwed onto said threaded spindle. One of the screw connection parts of the helical gear is electrically driven in order to adjust the wear of the brakes and the other screw connection part of the helical gear for the emergency release and/or auxiliary release of the brakes.Type: GrantFiled: March 31, 2003Date of Patent: September 2, 2008Assignee: Knorr-Bremse Systeme für Schienenfahreuge GmbHInventors: Erich Fuderer, Peter Wolfsteiner, Thomas Wagner, Manfred Vohla, Josef Staltmeir, Ulf Friesen
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Patent number: 7413061Abstract: A method and a device for controlling an electrically actuated wear adjuster of a brake application device for vehicles, in particular rail vehicles. Said method comprises the following steps: a) determination of an actual application stroke of brake linings against an allocated brake disc or brake drum during service braking, in accordance with at least one measured brake application path that is traversed by the brake linings and with a measured braking force value that is allocated to said brake application path; b) comparison of the actual application stroke with a desired brake application stroke or a desired application stroke tolerance range and if the actual application stroke deviates from said stroke or range: calculation of an adjustment path from said deviation; c) electronic control of the wear adjuster in accordance with the calculated adjustment path.Type: GrantFiled: March 31, 2003Date of Patent: August 19, 2008Assignee: Knorr-Bremse Systeme für Schienenfahrzeuge GmbHInventors: Thomas Wagner, Thomas Burkhart, Ulf Friesen, Manfred Vohla, Josef Staltmeir
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Publication number: 20080156944Abstract: A control unit for a rail vehicle, comprising a braking control unit that contains an electronic braking control device for emitting control commands to brake actuators and/or comprising an anti-skid device, which controls the wheel slip of the wheels of at least one axle in accordance with at least one rotational speed signal from an anti-skid sensor. The control unit also comprises a roll monitoring unit with an electronic roll monitoring control device and at least one roll monitoring sensor for detecting the rotational speed of at least some wheels in the form of a rotational speed signal, and comprises a rolling gear monitoring unit for monitoring and/or diagnosing critical conditions of and damage to the rolling gear. The monitoring unit comprises an electronic control device for monitoring the rolling gear.Type: ApplicationFiled: February 28, 2006Publication date: July 3, 2008Applicant: KNORR-BREMSE SYSTEME FUR SCHIENENFAHRZEUGE GMBHInventors: Stefan Aurich, Johannes Schuhmacher, Jorg-Johannes Wach, Ulf Friesen
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Patent number: 7234567Abstract: A brake application for a rail vehicle brake includes a brake actuator for application and release of the rail vehicle brake. Also included is a force converter for converting energy supplied by the brake actuator to a brake application movement. The force converter includes: (1) a shearing force measuring bolt arranged in a power transmission path; (2) at least one measuring sensor measuring breaking force either indirectly or directly; and (3) at least two mutually swivellable force transmission elements having passage openings. The shearing force measuring bolt forms a hinge bolt of a hinge, which hinge bolt penetrates the passage openings.Type: GrantFiled: September 23, 2003Date of Patent: June 26, 2007Assignee: Knorr-Bremse Systeme für Schienenfahrzeuge GmbHInventors: Thomas Wagner, Ulf Friesen, Josef Staltmeir
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Publication number: 20060219486Abstract: A method and a device for controlling an electrically actuated wear adjuster of a brake application device for vehicles, in particular rail vehicles. Said method comprises the following steps: a) determination of an actual application stroke of brake linings against an allocated brake disc or brake drum during service braking, in accordance with at least one measured brake application path that is traversed by the brake linings and with a measured braking force value that is allocated to said brake application path; b) comparison of the actual application stroke with a desired brake application stroke or a desired application stroke tolerance range and if the actual application stroke deviates from said stroke or range: calculation of an adjustment path from said deviation; c) electronic control of the wear adjuster in accordance with the calculated adjustment path.Type: ApplicationFiled: March 31, 2003Publication date: October 5, 2006Inventors: Thomas Wagner, Thomas Burkhart, Ulf Friesen, Manfred Vohla, Josef Staltmeir
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Publication number: 20060151261Abstract: A brake application for a rail vehicle brake includes a brake actuator for application and release of the rail vehicle brake. Also included is a force converter for converting energy supplied by the brake actuator to a brake application movement. The force converter includes: (1) a shearing force measuring bolt arranged in a power transmission path; (2) at least one measuring sensor measuring breaking force either indirectly or directly; and (3) at least two mutually swivellable force transmission elements having passage openings. The shearing force measuring bolt forms a hinge bolt of a hinge, which hinge bolt penetrates the passage openings.Type: ApplicationFiled: September 23, 2003Publication date: July 13, 2006Applicant: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbHInventors: Thomas Wagner, Ulf Friesen, Josef Staltmeir
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Patent number: 7055660Abstract: The invention relates to an electromechanical brake applying device, especially for a rail vehicle brake, comprising a) an operating brake unit for producing a load-corrected and/or a skid-controlled brake force, b) an accumulation brake unit having an energy accumulator for storing and supplying energy for applying the brake, and c) an unlockable locking device for the energy accumulator. According to the invention, at least one control and monitoring device is provided for monitoring the brake function of the brake applying device. When the brake applying device is intact, a signal for keeping the locking device locked can be produced by said control and monitoring device, and in the event of safety braking and/or park braking, the operating brake unit can be activated in order to apply the brake.Type: GrantFiled: December 13, 2001Date of Patent: June 6, 2006Assignee: Knorr-Bremse Systeme für Schienenfahrzeuge GmbHInventor: Ulf Friesen