Abstract: Disclosed is a brake application mechanism for a disc brake in a utility vehicle, having a pivotable brake lever that is supported on an inner wall of a brake caliper and, indirectly, on a bridge which is movably disposed in the brake caliper and which supports at least one brake pad, wherefor an axially and radially secured antifriction roller is disposed between the brake lever and the bridge. The disclosed brake application mechanism is designed such that the antifriction roller rests on the bridge in such a way as to be prevented from rotating and sliding.

Abstract: A method carries out a self-test of an electrical converter circuit, by use of a control device, proceeding from a known operating point at which a predetermined electrical operating variable has a predetermined starting value, a measurement cycle is begun by the converter circuit being operated. It is additionally provided that the time since the starting of the measurement cycle is detected, and the electrical operating variable and the time constitute two monitoring variables of the self-test. The measurement cycle is ended if one of the two monitoring variables satisfies an ending criterion. A test value is then formed from a measurement value of the other of the two monitoring variables at the end of the measurement cycle and a check is made to ascertain whether the test value lies outside a predetermined reference interval. If so an error signal is generated.

Abstract: A method carries out a self-test of an electrical converter circuit, by use of a control device, proceeding from a known operating point at which a predetermined electrical operating variable has a predetermined starting value, a measurement cycle is begun by the converter circuit being operated. It is additionally provided that the time since the starting of the measurement cycle is detected, and the electrical operating variable and the time constitute two monitoring variables of the self-test. The measurement cycle is ended if one of the two monitoring variables satisfies an ending criterion. A test value is then formed from a measurement value of the other of the two monitoring variables at the end of the measurement cycle and a check is made to ascertain whether the test value lies outside a predetermined reference interval. If so an error signal is generated.

Abstract: The invention relates to a disk brake for a utility vehicle, comprising a brake caliper, which extends over a brake disk and which is slidably held on at least one guide bar, which is connected to a stationary brake bracket by means of a screw, wherein the screw is fed through the guide bar, is designed in such a way that the guide bar has impressing elements, which are formed on the end face of the guide bar that lies against the brake bracket, at least in a circumferential and/or radial partial region, which impressing elements engage into the brake bracket in an impressed manner in such a way that an interlocking connection and/or a frictional connection is formed.

Abstract: A cast iron brake caliper of a disc brake, includes a caliper back and caliper head connected to the caliper back via tension struts arranged parallel and spaced apart from one another. The caliper head has a housing surrounding an accommodation chamber for functional parts and, separate from and adjacent to the housing, an integrally molded, protruding connector, which accommodates a bearing bore for a fixed bearing, and is connected to the housing by way of an integrally molded rib. The brake caliper is designed such that the rib is guided across the connector up to and into an outer edge region of the caliper head.

Abstract: A method operates a DC-DC voltage converter. A current measurement circuit generates a current signal correlated with a coil current of a coil. A hysteretic switch control system electrically turns off a switch for driving the coil current, if the current signal signals a coil current greater than a peak comparison value, and electrically turns on the switch if the current signal signals a coil current lower than a valley comparison value. An actual value measurement circuit generates an actual value signal correlated with an electrical output variable of the DC-DC voltage converter. A controller unit adjusts the output variable to a prescribed setpoint value and, generates a comparison value signal depending on a control deviation and the switch control system sets an average value of the peak comparison value and generates the valley comparison value from the comparison value signal.

Abstract: A disc brake, preferably actuated by compressed air, for a motor vehicle, has a brake caliper which has a brake application section with a brake application device with a rotary brake lever, at least one wear adjusting device for adjusting wear of brake pads, and a brake disc with a synchronization unit which includes an adjusting device, a drive device and a synchronizer. The adjusting device and the drive unit are inserted in each case into a threaded plunger of a spindle unit and are attached by way of a mounting arrangement on a bearing wall of the brake application section of the brake caliper. The synchronization unit is installed with the adjusting device and the drive device as a preassembled group into the brake application section of the brake caliper, wherein the synchronizer is arranged in the region of the mounting arrangements on the bearing wall within the brake application section. A method for installing a synchronization unit is provided.

Abstract: A control device drives an operating current of a lighting unit formed with light emitting diodes. The lighting unit is connected to a contact pair of the control device. The control device sets at least one parameter of the operating current that depends on a diode type of the lighting unit. With the lighting unit switched off, the control device generates a measurement current and ascertains a measurement value to identify the diode type. A hysteretic regulator sets the parameter of the operating current, and a current source circuit sets a reference signal at a comparator during the operation of the lighting unit. With the lighting unit inactive, the current source circuit generates the measurement current. Alternatively, a precharge device of the control device charges an output capacitance at the contact pair by a predetermined precharge routine, and a deviation from a predetermined expected value is ascertained as the measurement value.

Abstract: A method for operating a DC-DC voltage converter, which, at an output, adjusts an output variable to a prescribed setpoint value by way of a regulator unit. Depending on an actual value of the output variable, the regulator unit sets a duty cycle of a pulse-width modulation. The regulator unit has an operating parameter for providing the pulse-width modulation. The operating parameter is variable and is changed to a new parameter value by a control apparatus which determines whether, with the unchanged setpoint value and the new parameter value, the regulator unit sets a lower duty cycle for adjusting the output variable than before the setting of the new parameter value. In that case, the new parameter value is retained. Otherwise it is changed back. The operating parameter that is varied by the new parameter value is a period of the pulse-width modulation and/or an edge steepness of switching edges.

Abstract: A disc brake, having a brake caliper which engages over a brake disc, is held on a stationary brake carrier such that it can be displaced axially in relation to the brake disc, and in which brake pads are positioned which, during a braking operation, can be pressed against the brake disc by a brake application device. A device for visual wear detection of brake disc wear and/or brake lining wear is provided, and is configured in such that, for wear detection, a comparison element which extends in the displacement direction of the brake caliper and in an opposed manner with respect to the brake disc is fastened to the brake carrier. The comparison element is of strip-shaped configuration, with continuously planar side surfaces, and has at least one step on the edge side in the displacement direction of the brake caliper.

Abstract: A driver circuit for a light-emitting diode arrangement has a supply terminal for connecting a voltage source. A boost converter inductance connects the supply terminal to a common circuit node. A switching unit connects the circuit node to ground depending on a switching signal. A rectifying unit connects the circuit node to an anode terminal for the light-emitting diode arrangement by way of a circuit branch to which a terminal of a storage capacitance and a terminal of an RC element are connected. A cathode terminal for the cathode side of the light-emitting diode arrangement is electrically connected to the circuit node. A buck converter inductance is connected in each case between the rectifying unit and the anode terminal and/or between the cathode terminal and the circuit node.

Abstract: A method operates a DC-DC voltage converter. A current measurement circuit generates a current signal correlated with a coil current of a coil. A hysteretic switch control system electrically turns off a switch for driving the coil current, if the current signal signals a coil current greater than a peak comparison value, and electrically turns on the switch if the current signal signals a coil current lower than a valley comparison value. An actual value measurement circuit generates an actual value signal correlated with an electrical output variable of the DC-DC voltage converter. A controller unit adjusts the output variable to a prescribed setpoint value and, generates a comparison value signal depending on a control deviation and the switch control system sets an average value of the peak comparison value and generates the valley comparison value from the comparison value signal.

Abstract: A control device drives an operating current of a lighting unit formed with light emitting diodes. The lighting unit is connected to a contact pair of the control device. The control device sets at least one parameter of the operating current that depends on a diode type of the lighting unit. With the lighting unit switched off, the control device generates a measurement current and ascertains a measurement value to identify the diode type. A hysteretic regulator sets the parameter of the operating current, and a current source circuit sets a reference signal at a comparator during the operation of the lighting unit. With the lighting unit inactive, the current source circuit generates the measurement current. Alternatively, a precharge device of the control device charges an output capacitance at the contact pair by a predetermined precharge routine, and a deviation from a predetermined expected value is ascertained as the measurement value.

Abstract: A method for operating a DC-DC voltage converter, which, at an output, adjusts an output variable to a prescribed setpoint value by way of a regulator unit. Depending on an actual value of the output variable, the regulator unit sets a duty cycle of a pulse-width modulation. The regulator unit has an operating parameter for providing the pulse-width modulation. The operating parameter is variable and is changed to a new parameter value by a control apparatus which determines whether, with the unchanged setpoint value and the new parameter value, the regulator unit sets a lower duty cycle for adjusting the output variable than before the setting of the new parameter value. In that case, the new parameter value is retained. Otherwise it is changed back. The operating parameter that is varied by the new parameter value is a period of the pulse-width modulation and/or an edge steepness of switching edges.

Abstract: The disclosure relates to a DC-DC converter in which a first coil terminal is connected with an input terminal and a second coil terminal is connected, on the one hand, via a rectification switch to an output terminal and, on the other hand, via a control switch to a ground potential and a control circuit is configured to switch in successive switching cycles in each case in a regulating phase the rectification switch to be electrically blocking and the control switch to be electrically conducting, and in a rectifying phase to switch the control switch to be electrically blocking. A measuring component generates a measurement signal which signals a current intensity of a coil current, and a comparator circuit compares the measurement signal with a threshold value and the control circuit keeps the rectification switch electrically blocking in the rectifying phase and conducts the coil current via a bypass diode if the current intensity was continuously lower than the threshold value in the regulating phase.

Abstract: A method and a device for monitoring the output current from a DC static converter. The monitoring device has a switching device for switching a switch on the DC static converter, in accordance with a hysteresis regulation of the output current from a DC static converter within a hysteresis range defined by a lower limit value and an upper limit value. A switch on the DC static converter is switched by the switching device when the value passes out of the hysteresis range and at least one limit value is modified to compensate for switching delays by way of a compensating circuit connected to the switching device.

Abstract: A driver circuit for a light-emitting diode arrangement has a supply terminal for connecting a voltage source. A boost converter inductance connects the supply terminal to a common circuit node. A switching unit connects the circuit node to ground depending on a switching signal. A rectifying unit connects the circuit node to an anode terminal for the light-emitting diode arrangement by way of a circuit branch to which a terminal of a storage capacitance and a terminal of an RC element are connected. A cathode terminal for the cathode side of the light-emitting diode arrangement is electrically connected to the circuit node. A buck converter inductance is connected in each case between the rectifying unit and the anode terminal and/or between the cathode terminal and the circuit node.

Abstract: The invention relates to a disk brake for a utility vehicle, comprising a brake caliper, which extends over a brake disk and which is slidably held on at least one guide bar, which is connected to a stationary brake bracket by means of a screw, wherein the screw is fed through the guide bar, is designed in such a way that the guide bar has impressing elements, which are formed on the end face of the guide bar that lies against the brake bracket, at least in a circumferential and/or radial partial region, which impressing elements engage into the brake bracket in an impressed manner in such a way that an interlocking connection and/or a frictional connection is formed.

Abstract: Method and apparatus for controlling the hysteresis of an output current from a DC-DC converter (3) to a default value (19) for an average output current and within a hysteresis range (11), wherein the output current (6) is measured and is compared with a first reference value and a second reference value, wherein a switch (7) of the DC-DC converter (3) is changed over at the limits of the hysteresis range (11) on the basis of a first reference time (20), at which the output current (6) reaches the first reference value, and a second reference time (24), at which the output current reaches the second reference value, wherein the switch (7) is changed over with a time delay after the second reference time (24), and wherein the time delay is selected on the basis of a time difference between the first reference time (20) and the second reference time (24) in such a manner that a period of time, during which the output current (6) is higher than the default value (19), and a period of time, during which the outp

Abstract: A disc brake, preferably actuated by compressed air, for a motor vehicle, has a brake caliper which has a brake application section with a brake application device with a rotary brake lever, at least one wear adjusting device for adjusting wear of brake pads, and a brake disc with a synchronization unit which includes an adjusting device, a drive device and a synchronizer. The adjusting device and the drive unit are inserted in each case into a threaded plunger of a spindle unit and are attached by way of a mounting arrangement on a bearing wall of the brake application section of the brake caliper. The synchronization unit is installed with the adjusting device and the drive device as a preassembled group into the brake application section of the brake caliper, wherein the synchronizer is arranged in the region of the mounting arrangements on the bearing wall within the brake application section. A method for installing a synchronization unit is provided.