Patents by Inventor Johann Locher
Johann Locher 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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Publication number: 20250125607Abstract: A protection circuit with fast responses and high noise immunity includes values of components in the protection circuit determined based on a circuit model of the protection circuit for specific power devices. Further, the circuit model includes overcurrent fault detection criterion based on a maximum current and voltage across power device, together with the transient response of the power device. The protection circuit includes an additional current source when used with a gate driver circuit having a built-in current source. The protection circuit further includes a precharged circuit configured to set the monitored voltage at a base voltage close to the threshold voltage to improve the fault detection responses with a smaller tolerance gap in voltage.Type: ApplicationFiled: October 15, 2024Publication date: April 17, 2025Applicant: ALPITRONIC SRLInventors: Johannes Locher, Andreas Oberrauch, Alessandro Ciceri, Tizian Senoner
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Patent number: 7122764Abstract: A sheathed-element glow plug for self-igniting internal combustion engines has an electrical heating element which projects into a combustion chamber of the internal combustion engine, and a current feed-through for providing a heating current for the heating element through an opening in the combustion chamber. A switch is positioned in the region of the current feed-through, and the heating current may be controlled by the opening and closing of the switch.Type: GrantFiled: August 12, 2000Date of Patent: October 17, 2006Assignee: Robert Bosch GmbHInventors: Hans-Peter Bauer, Albrecht Geissinger, Johannes Locher, Werner Teschner, Jochen Neumeister
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Patent number: 6668630Abstract: A device is proposed for monitoring the combustion process in internal combustion engines, a direct monitoring and a monitoring of individual combustion processes, in particular individual combustion chambers, being possible. This is achieved using a waveguide, which is integrated in a component, which protrudes into the combustion chamber.Type: GrantFiled: August 2, 2001Date of Patent: December 30, 2003Assignee: Robert Bosch GmbHInventors: Eckart Kuglin, Albrecht Geissinger, Gert Lindemann, Johannes Locher, Wolfgang Dressler, Friederike Lindner, Volker Rothacker, Christoph Kern
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Publication number: 20030173409Abstract: A transport or conveyer unit for a chip, particularly for a (GSM) telephone chip (SIM card), is characterised by a CD card known per se in the usual credit or bank card format, which has a mounting or fixing area for the telephone chip and whose data track contains information from the chip telephone company sending the chip to the person acquiring the (telephone) chip.Type: ApplicationFiled: March 21, 2003Publication date: September 18, 2003Inventors: Werner Vogt, Johann Locher
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Patent number: 6126078Abstract: An identification medium with passive electronic data carrier and contactless, encoded communication with an associated read and write station (WR) has in a memory (42) a data organization with a common data field (CDF), with invariable, uncopiable master data (44), with a segmentable application data field (ADF), in which several independent applications can be written in application segments S1, S2, S3). A hierarchical authorization system (A) valid for all the identification media (IM-S) and all the read and write stations (WR) is established, with which each identification medium (IM-S) must be initialized and which ensures the mutual uninfluenceability of all the independent applications.Type: GrantFiled: January 21, 1998Date of Patent: October 3, 2000Assignee: Kaba Schliesssysteme AGInventors: Johann Locher, Ulrich Graf
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Patent number: 6054680Abstract: A sheathed type glow plug preheats the combustion chamber mixture of an auto-ignition internal combustion engine. The sheathed type glow plug comprises a ceramic heating apparatus; the resistance of the ceramic heating apparatus is increased by a reduction in cross section at the point which is most accessible to the combustion chamber mixture.Type: GrantFiled: November 3, 1997Date of Patent: April 25, 2000Assignee: Robert Bosch GmbHInventors: Johannes Locher, Albrecht Geissinger, Juergen Oberle, Werner Teschner, Horst Boeder, Karl-Heinz Heussner
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Patent number: 6046434Abstract: A sheathed-element glow plug for placement in the combustion chamber of an air-compressing internal combustion engine includes a sheath, a connector element for the glow current, and a tube secured in the sheath sealed at its end facing away from the sheath. A wire filament arrangement is embedded in insulating material within the part of the tube which protrudes from the sheath. The tube functions as a glow pencil. The sheath is manufactured using a first part, a second part, and an intermediate piece. The length of the intermediate piece is adjusted depending on the desired length of the sheathed-element glow plug.Type: GrantFiled: July 1, 1998Date of Patent: April 4, 2000Assignee: Robert Bosch GmbHInventors: Johannes Locher, Werner Teschner, Jorg-Chr. Nissen
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Patent number: 5844244Abstract: The contactless identification carrier which can be carried by a person and having access functions for particular areas, particularly skiing areas, is constructed as a separate, flat carrier element and is fixed in interchangeable, portable manner on a personal bracelet PA. The carrier element (1) contains a passive, integrated, electronic data carrier MI with processor, as well as an integrated antenna (2) surrounded by a dielectric (4) and a detachable fixing device (3). The antenna has partly open radiating surfaces FAO, which are not covered by electrically conductive parts of the personal bracelet PA. This gives a universally usable identification and access medium with very good comfort and convincing practical characteristics.Type: GrantFiled: January 24, 1997Date of Patent: December 1, 1998Assignee: Kaba Schliesssysteme AGInventors: Ulrich Graf, Johann Locher
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Patent number: 5816220Abstract: In a process and in a device for monitoring a fuel delivery system, in particular a common rail system for a diesel engine, a defect in the delivery system is found when a signal from a temperature sensor and/or a pressure sensor deviates from a predetermined value.Type: GrantFiled: April 30, 1997Date of Patent: October 6, 1998Assignee: Robert Bosch GmbHInventors: Gerhard Stumpp, Johannes Locher, Claus Maier, Jurgen Biester, Werner Teschner, Wilhelm Eyberg, Jochen Neumeister
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Patent number: 5653210Abstract: A method and a device for the open-loop and/or closed-loop control of a final controlling element, in particular for influencing the fuel injected into an internal combustion engine, are described. A system deviation is defined starting from a setpoint and an actual value. On the basis of the system deviation, a loop controller specifies a manipulated variable to be received by the final controlling element. If the system deviation lies outside of a range defined by at least two values, a maximum value is specified for the manipulated variable.Type: GrantFiled: April 23, 1996Date of Patent: August 5, 1997Assignee: Robert Bosch GmbHInventors: Werner Fischer, Johannes Locher, Peter Schmitz, Dietbert Schoenfelder, Peter Lutz
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Measuring circuit for impedance values particularly for use with inductive displacement transmitters
Patent number: 5444381Abstract: A measuring circuit (MS) for measuring the value of an impedance in an impedance network includes an oscillator device (OSZ1), a second oscillator device (OSZ2), a phase-controlled rectifier (PG), a reference/actual value comparison point (AG) and an integrator.The first oscillator device feeds a first alternating voltage of constant amplitude and constant frequency to a first output connection (A1). The second oscillator device feeds a second alternating voltage of the same frequency, but with adjustable amplitude and with phase shifted by 180.degree., to a second output connection (A2). The amplitude of the second alternating voltage depends on the phase of the signal which is transmitted to the phase-controlled rectifier via an input connection (E). If the input signal is in phase with the second output signal, the amplitude of the second output signal is reduced. However, if the input signal oscillates in opposite phase to the second output signal, the amplitude of the second output signal is increased.Type: GrantFiled: April 17, 1991Date of Patent: August 22, 1995Assignee: Robert Bosch GmbHInventors: Johannes Locher, Werner Fischer, Joerg Barth -
Patent number: 5335136Abstract: The invention relates to an electronic circuit arrangement for triggering excitation windings of electromagnetic components, provided with supplementary circuit elements, in particular free-running circuit elements, preferably solenoid valves (MV.sub.1 to MV.sub.n), whereby in order to provide a flexible open-loop control, the components are each connected in series to a controllable contact element (3). To reduce the degree of complexity of the circuit, the manufacturing price and the space requirement, it is proposed that the connecting terminals (1, 4) of this series connection lead directly, and the connections (2) between the components (MV.sub.1 to MV.sub.n) and the contact elements (3) lead via diodes (D.sub.1 to D.sub.n), respectively, to a collecting point (A, B, C), to which collecting points (A, B, C) is linked one and the same supplementary circuit-element configuration (T.sub.F,C.sub.L,10,11) shared by all components.Type: GrantFiled: June 9, 1993Date of Patent: August 2, 1994Assignee: Robert Bosch GmbHInventors: Johannes Locher, Herbert Graf, Nestor Rodriguez-Amaya, Alfred Schmitt, Joachim Tauscher, Werner Zimmermann
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Patent number: 5319180Abstract: A sheathed-element glow plug for disposition in the combustion chamber of air-compressing internal combustion engines is proposed which in a known manner contains a resistor element (17) in its sheathed-element (13), where this resistor element (17) is composed of two serially connected resistor spirals (20, 21). While the resistor spiral (20) on the combustion chamber side is a heater spiral with a resistance behavior which is essentially the same at all operating temperatures, the wirespiral shaped resistance spiral (21) on the side remote from the combustion chamber which acts as a regulating element, has a high temperature resistance coefficient.Type: GrantFiled: June 26, 1992Date of Patent: June 7, 1994Assignee: Robert Bosch GmbHInventors: Johannes Locher, Friedrich Muhleder, Bernhard Kaczynski, Werner Teschner
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Patent number: 5313153Abstract: A synchronizing current regulator whose clock frequency is able to be readjusted is provided in the case of a circuit configuration for the synchronized supply of an electromagnetic user with regulation which is acted upon by a control signal representing the difference between the instantaneous signal at the user and a predeterminable reference signal.Type: GrantFiled: September 6, 1990Date of Patent: May 17, 1994Assignee: Robert Bosch GmbHInventors: Johannes Locher, Werner Fischer, Joachim Tauscher
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Patent number: 5245501Abstract: A process for controlling and measuring the movement of an armature of an electromagnetic switching member with an excitation coil is proposed, which has the following steps: a current (i) or a voltage (u1) is applied to the excitation winding (3) in order to move the armature into a first actuatable position; before the start of the movement of the armature, the current or the voltage is raised above a value at which the armature remains in the actuated position, and before termination of the movement of the armature the current or the voltage is reduced to a defined value, which suffices to hold the armature in the actuated position; finally, the temporal variations in the current or the voltage are measured after setting of the defined value, for the purpose of recognizing the termination of the armature movement.Type: GrantFiled: June 26, 1991Date of Patent: September 14, 1993Assignee: Robert Bosch GmbHInventors: Johannes Locher, Hans-Joachim Siebert, Herbert Graf, Nestor Rodriguez-Amaya, Anton Karle, Alfred Schmitt, Joachim Tauscher, Werner Zimmermann, Dominique Buisson, Lucien Hehn, Pierre Lauvin, Henri Paganon
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Patent number: 5235949Abstract: The invention relates to a method and arrangement for preparing a fuel-metering signal M for a diesel engine starting with measured variables such as accelerator pedal position, rotational speed, lambda, exhaust gas temperature or torque. A fuel quantity request MW is pregiven in dependence upon the position of the accelerator pedal. This quantity request MW is supplied to a minimum selector together with a second signal. The output signal M of the minimum selector, in turn, determines the metered fuel. The second signal derives from a precontrol characteristic field 50 in dependence upon the speed. The output signal of the precontrol characteristic field MV is influenced by the controller output signal MR in specific operating conditions.Type: GrantFiled: July 26, 1990Date of Patent: August 17, 1993Assignee: Robert Bosch GmbHInventors: Josef Wahl, Alf Loffler, Hermann Grieshaber, Wilhelm Polach, Ewald Eblen, Joachim Tauscher, Helmut Laufer, Ulrich Flaig, Johannes Locher, Manfred Birk, Gerhard Engel, Alfred Schmitt, Pierre Lauvin, Fridolin Piwonka, Anton Karle, Hermann Kull
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Patent number: 5202628Abstract: An evaluating circuit for linearizing the output signal of a differential-choke displacement transmitter has two inductive coils each supplied with an alternating voltage with constant frequency produced by an oscillator, wherein the amplitude is adjustable and the second alternating voltage is phase-displaced relative to the first alternating voltage by 180.degree.. The signal which is picked up between the inductive coils at the input is compared, after a phase-controlled rectification, with a reference value and the deviation is integrated. With the aid of the integrated signal the regulation of the amplitude adjustment of the alternating voltages is performed. As a result a measuring signal without residual ripple is obtained, which changes proportionally to an adjustment path for example of an adjustment rod.Type: GrantFiled: November 27, 1991Date of Patent: April 13, 1993Assignee: Robert Bosch GmbHInventors: Johannes Locher, Werner Fischer, Joerg Barth
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Patent number: 5131371Abstract: The invention is directed to a method and arrangement for controlling a self-igniting internal combustion engine. The arrangement includes at least one measured-value sensor, electronic control unit for forming a quantity signal for metering fuel, and a control unit for driving individual actuators for each cylinder. The actuators determine the quantity of fuel injected by the pump elements into the cylinders. Under specific conditions, a corrective unit is activated which determines corrective values specific to the cylinders for making the cylinders equal. The open-loop control unit applies the metering signal to the actuators in dependence upon the quantity signal and the corrective values.Type: GrantFiled: September 7, 1990Date of Patent: July 21, 1992Assignee: Robert Bosch GmbHInventors: Josef Wahl, Alf Loffler, Hermann Grieshaber, Wilhelm Polach, Ewald Eblen, Joachim Tauscher, Helmut Laufer, Ulrich Flaig, Johannes Locher, Manfred Birk, Gerhard Engel, Alfred Schmitt, Pierre Lauvin, Fridolin Piwonka, Anton Karle, Hermann Kull, Werner Zimmermann
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Patent number: 5116342Abstract: The invention relates to a trigger circuit which compares amplitudes of the signal waveform of a periodic signal to reference values dependent upon the previous signal waveform of this signal. A trigger signal is emitted when the particular reference value is reached. The trigger circuit includes a memory for the particular reference value. The reference value is determined from a portion of the period of the signal to determine a precise triggering point.Type: GrantFiled: December 31, 1990Date of Patent: May 26, 1992Assignee: Robert Bosch GmbHInventors: Wolfgang Schmidt, Werner Fischer, Johannes Locher
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Patent number: 5070836Abstract: The invention is directed to a method and an arrangement for controlling the fuel injection in a high-pressure fuel pump. Magnetic valves determine the fuel quantity to be injected into the engine. The magnetic valve is controlled during the pumping phase of the pumping element in such a manner that first a preinjection and then a main injection is carried out. In specific operating conditions, the control apparatus determines the duration of the drive pulses for the magnetic valve at which a preinjection just takes place. With the duration of the drive pulses as a basis, the control apparatus forms compensating signals for the drive pulses which effect preinjection and stores the same.Type: GrantFiled: September 5, 1990Date of Patent: December 10, 1991Assignee: Robert Bosch GmbHInventors: Josef Wahl, Alf Loffler, Hermann Grieshaber, Wilhelm Polach, Ewald Eblen, Joachim Tauscher, Helmut Laufer, Ulrich Flaig, Johannes Locher, Manfred Birk, Gerhard Engel, Alfred Schmitt, Pierre Lauvin, Fridolin Piwonka, Anton Karle, Hermann Kull