Continental Teves, Ag and Company Ohg

Nxp Usa, Inc.

Frank Michel

Wolfgang Fey

Andreas Heise

Peter Stauder

Peter Oehler

Mario Engelmann

Tom Kaufmann

Micha Heinz

Adrian Traskov

Ralf Hartmann

Axel Schmitz

René Trapp

Robert Gach

Andreas Kirschbaum

Tobias Beckmann

Ling Chen

Christian Bitsch

Ireneusz Janiszewski

Markus Jäger

Wolfgang Joeckel

Claas Cornelius

Luc Van Dijk

Andreas Kirchbaum

Andreas Pachur

Rene Trapp

Method and electronic device for the pulse-modulated actuation of a load in a vehicle, a period duration (T) of a frequency (f) of the pulse modulation being able to be divided into an integer number (N) of sections (T), the duration of each of which corresponds to a multiple of a period duration (T) of a clock signal, and the method having the steps of: calculating a frequency (f, f) or period duration (T, T) of a period of the pulse modulation on the basis of underlying frequency modulation, and determining the duration of a respective section (T) of a period duration (T) of the pulse modulation using the calculated frequency (f, f) or period duration (T, T) of a period of the pulse modulation.

Method and electronic device for the pulse-modulated actuation of a load

A method for checking a control circuit for an inductive load, wherein one or two currents are measured and evaluated. An arrangement for carrying out such a method is also disclosed.

Method and arrangement for checking a control circuit of an inductive load

A method for protecting configuration data from a data bus transceiver operable in a subnetwork mode. The configuration data are provided for comparison with data bus message data arriving via a data bus. A reference checksum for the configuration data is generated and stored, and recurrently checked. In the event of an identified alteration, a wake-up signal and/or a piece of error information is output. During or after writing the configuration data to a configuration register via the data bus or directly before the change to the low-power mode of the electronic control unit, a checksum unit forms a checksum that is stored in a reference register. In the low-power mode of the electronic control unit, the checksum for the configuration is repeatedly recomputed and compared with the checksum stored in the reference register. If the recomputed checksum does not match the stored checksum, a wake-up process is triggered.

Method for protecting configuration data from a data bus transceiver, data bus transceiver and data bus system

A method for limiting peak currents, particularly depending on a charge quantity provided by a voltage source, and the maximum pitch of the current flanks of an electric motor for an electrohydraulic motor vehicle brake system, particularly a pump motor, controlled by pulse width modulation, wherein a change to an actual duty cycle of the PWM is made by a first duty cycle of the PWM on a second duty cycle at runtime, wherein the change takes place according to a positive or negative pitch value calculated and/or changeable at runtime. The invention further describes an electronic circuit arrangement for the implementation of a method for limiting peak currents and the maximum pitch of current flanks.

Method and circuit arrangement for limiting peak currents and the slope of the current edges

Method in which the current is measured inside an integrated PWM control circuit using at least one A/D converter which is likewise integrated in the circuit is described. The PWM controller is provided for the purpose of driving inductive loads and is arranged, in particular, in an electronic circuit of an electronic controller for a motor vehicle braking system. Before determining the actual current of the PWM controller, which is determined using the at least one A/D converter, the current is smoothed using a low-pass filter. A circuit arrangement for carrying out the above method and its use in electronic motor vehicle control systems is also described herein.

Method and pulse-width-modulated current control circuit for driving inductive loads in motor vehicles

The invention relates to an electronic motor vehicle control system having at least one valve actuating circuit which controls a load current by means of pulse width modulation. The actuating circuit has at least one electronic current measuring circuit which has at least one measurement path with at least one analog/digital converter. The analog/digital converts an analog measurement signal of the load current into a digital measurement signal of the load current and is actuated or designed in such a way as to carry out a plurality of current measurements per PWM period. The at least one measurement path of the current measurement circuit has a signal conservation circuit which provides the analog measurement signal of the load current substantially unchanged, and independent of the actual load current, for at least a defined hold time (t, t).

Electronic motor vehicle control system with current measuring circuit

Disclosed is a method of improving the immunity to interference of an integrated circuit () having error signals transferred between a microprocessor chip or multiple processor &#x3bc;C () and an additional component (). For the transfer, a minimum pulse length that is independent of the clock frequency of the microprocessor or the microprocessors is defined, starting from which a signal on an error line having a defined pulse length is interpreted as an error. Also disclosed is an integrated circuit, which is designed so that the above method is implemented. The circuit has a microprocessor chip or multiple processor microcontroller () or microprocessor module and an additional component () having separately arranged power elements. The circuit also has pulse extending devices and/or signal delaying devices for the output of error pulses (') one after the other through at least one error line ().

Method and integrated circuit for increasing the immunity to interference

An integrated circuit arrangement on a common chip or chip support, for safety critical applications, in particular for use in control and regulation units for a motor vehicle braking system, including at least one microprocessor system module, which has at least one core processor, provided with at least one ROM and at least one RAM, at least one power module for controlling external users and at least one monitoring module for monitoring at least parts and/or part systems of the circuit arrangement, the circuit arrangement including at least one temperature sensor for recording a chip temperature.

Integrated circuit arrangement for safety critical regulation systems

An electronic circuit for correcting at least one digital measurement signal (&#x3a3;&#x394;n, &#x3a3;&#x394;) comprising at least one measurement channel having a sigma-delta modulator and a correction circuit. The sigma-delta modulator changes an analog measurement signal into a digital measurement signal in the form of a binary value sequence. The correction circuit corrects the digital measurement signal (&#x3a3;&#x394;n, &#x3a3;&#x394;) as a function of at least one correction datum (trim), wherein the correction circuit comprises at least one adding element and at least one multiplexer. The digital measurement signal is corrected in that the correction datum (trim) is weighted by means of the multiplexer and the adding element as a function of the digital measurement signal (&#x3a3;&#x394;n, &#x3a3;&#x394;).

Electronic circuit for correcting at least one digital measurement signal

Circuit arrangement () in an electronic control device which is connected to at least one wheel speed sensor channel () transmitting wheel speed information, in particular in the form of a current signal, the circuit arrangement () having at least one monitoring module (U,U,U,U) for the at least one wheel speed sensor channel (), where this at least one monitoring module (U,U,U,U) is suitable for monitoring an excess current fault on at least one wheel speed sensor channel (), in which, when an excess current fault is detected by the at least one monitoring module (U,U,U,U) the respective wheel speed sensor channel(s) () is/are blocked by a blocking circuit () of the circuit arrangement (), and/or in which the circuit arrangement () causes the blocking of the respective wheel sensor channel or channels () from outside the circuit arrangement ().

Circuit arrangement and method for monitoring wheel speed sensors in a motor vehicle control device

An electronic controller for motor vehicle control systems having at least one valve actuation circuit is described herein. The electronic controller uses pulse width modulation to control the load current (i) flowing through an essentially inductive load (L), and has at least one electronic current measuring circuit which has at least one analog/digital converter which converts an analog measurement signal for the load current (i) into a digital measurement signal for the load current (i). The at least one analog/digital converter is a sigma-delta modulator. A method for measuring current using sigma-delta modulation and to the use of the electronic controller in a motor vehicle brake system is also described herein.

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Rosbach v. d. Höhe, Germany

Frank Michel