Robert Bosch

Bernd Schelling

Ralph Bauer

Thomas Holst

Mehmet Oencel

Georg Hoegele

Patrick Bauer

Johannes Locher

Ulrich Flaig

Yannick Chauvet

Winfried Arnold

Martin Czasch

A method is proposed for actuating an electromagnetic load () which can be switched between at least two switching states, particularly a magnetic valve, wherein switching between a first and a second of the switching states takes place as a result of a current flowing through the load () by means of applying an electrical voltage to said load (). Provision is thereby made for the voltage to be clocked upon application thereof to said load () if due to the applied voltage the switching process would occur without clocking outside of a current ramp-up. The invention furthermore relates to an electrical circuit for actuating an electromagnetic load ().

Method for actuating an electromagnetic load and a corresponding circuit

The invention relates to an electric circuit configuration for switching an electrical load (), particularly a solenoid valve, by means of at least one switching means () associated with the consumer (), particularly a transistor. The circuit configuration comprises at least one analysis circuit comprising at least one measuring resistor () connected in series with the switching means (), at least one first analysis means () for determining a parameter corresponding to the short-circuit current, and at least one second analysis means () for determining a parameter corresponding to the consumer current. The circuit configuration is characterized in that the first analysis means () is connected in parallel with the measurement resistor ().

Electric circuit configuration for switching an electrical load

The invention relates to an arrangement () for operating an exhaust gas post-treatment device, particularly of a motor vehicle, wherein the arrangement () comprises a plurality of consumers (-) and a controller (), wherein the controller () comprises at least one switching device () for switching the consumers (-) on and off. According to the invention, the consumers (-) are grouped according to function, and connected to one switch (-) each of the switching device (). The invention further relates to a method for operating an exhaust post-treatment device.

Arrangement and method for operating an exhaust gas post-treatment device

A method for identifying a short circuit to the positive terminal of a battery in a circuit of a motor vehicle. An electronic circuit breaker HS () is actuated by a control device () and has at least one electrical switch which switches on and off loads (), the switching state of said switches being reported to the control device () and determines that operation is fault-free when the connected loads () are supplied with voltage when the electronic circuit breaker HS () is switched on and a 'short circuit' or 'load drop' message is produced at the circuit breaker when the electronic circuit breaker HS () is switched off, switching off the supply voltage by the electronic circuit breaker HS () is detected at the end of a driving cycle of the motor vehicle. A fault is determined when a &#x201c;short circuit&#x201d; or &#x201c;load drop&#x201d; message is not produced at the electrical switch.

Method for identifying a short circuit to the positive terminal of a battery and circuit device for carrying out the method

The invention relates to an arrangement () for operating an exhaust gas aftertreatment device, in particular of a motor vehicle, having a plurality of active sensors (-) and a control device () that comprises at least one voltage supply unit () to which the sensors (-) are operatively connected. According to the invention, the voltage supply unit () comprises at least two supply benches (-) that can be switched independently from each other. The sensors (-) are grouped according to the function thereof and are then associated with one of the supply benches (-).

Arrangement and method for operating an exhaust gas aftertreatment device

A so-called current-regulated end stage for electromagnetic consumers such as magnetic valves or electromagnetic final control elements is provided, in which a field effect transistor takes over the functions of the switch and of the current measuring resistor. When the field effect transistor is conductive, the voltage over a capacitor is made to follow the current flowing through the consumer, and when the field effect transistor is blocked, the flow of current through the free-running circuit is simulated via the capacitor discharge. Both a singlefold and a multiple realization are disclosed, the latter using multiple examples of an RC member and a threshold switch.

Current regulating circuit for an electric consumer

Repeated trigger pulses cause a comparator to put a transistor into its conducting condition, producing a rise in emitter-collector current dependent upon the inductance of a variable inductor. A voltage corresponding to this current is developed across a resistor in circuit with the inductor and is applied to the noninverting input of the comparator and when it reaches a threshold value, the comparitor switches and turns off a transistor, after which the reaction current in the inductor is dissipated through one or more resistors. The comparator output produces a step wave having a duty cycle proportional to the inductance value, a signal which is particularly useful when the inductor is a transducer producing an inductance that varies proportionately to a physical dimension or a pressure, particularly when these are operation parameters of an internal combustion engine.

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Stuttgart, Germany

Bernd Schelling