Abstract: The invention relates to a circuit assembly, to a system and to a method for switching a high-voltage battery (201) and to a vehicle having such a circuit assembly and such a system. The circuit assembly comprises a transistor for conducting a current from the battery (201) to a load and comprises a diode (202) for conducting a return current into the battery (201). The circuit assembly is configured to provide a pre-charging current by means of the pulsed switching of the transistor (203).

Abstract: The invention relates to a method and a device for operating a drive train (101) of a hybrid vehicle comprising an electrical system (102), the drive train (101) having at least one vehicle drive wheel (105) in addition to one first electrical machine (104) and the first electrical machine (104) being connected to the electrical system (102). According to the invention, in order to stabilize the voltage of the electrical system (102), the first electrical machine (104) is operated without being coupled to the drive wheels (105) of the hybrid vehicle.

Abstract: A method for operating an electrical system in a motor vehicle having two electrical machines connected to the electrical system via one controllable inverter each. A regulated generator mode is initiated. A first step detects a drop below a first predetermined voltage in the electrical system. A second step, on the basis of an induced freewheeling voltage expected for one of the electrical machines, selects one of the inverters and actuating such that the electrical machine connected thereto is operated in electrical freewheel, with the result that the rotation of said machine induces a freewheeling voltage in the electrical system. A third step detects the rise above a second predetermined voltage for the induced electrical freewheeling voltage available in the electrical system. A fourth step actuates the inverter of the first electrical machine such that the first electrical machine connected thereto is operated in regulated generator mode.

Abstract: The present invention relates to a method (50) for operating an electrical system (44), particularly in a motor vehicle (10), wherein the electrical system (44) has at least two electrical machines (14, 34) which are connected to the electrical system (44) via one controllable inverter (32, 42) each, wherein a regulated generator mode for a first instance of the electrical machines (14, 34) is initiated (60), characterized in that a first step (54) involves detection of a drop below a first prescribable voltage value for the electrical voltage available in the electrical system (44), and then a second step (56), on the basis of an induced freewheeling voltage that is to be expected for one of the electrical machines (14, 32), involves one of the inverters (32, 42) being selected, which is associated with an electrical machine (14, 32), and being actuated such that the electrical machine (14, 34) connected thereto is operated in electrical freewheel, with the result that the rotation of said machine causes it

Abstract: The invention relates to a method and a device for operating a drive train (101) of a hybrid vehicle comprising an electrical system (102), the drive train (101) having at least one vehicle drive wheel (105) in addition to one first electrical machine (104) and the first electrical machine (104) being connected to the electrical system (102). According to the invention, in order to stabilise the voltage of the electrical system (102), the first electrical machine (104) is operated without being coupled to the drive wheels (105) of the hybrid vehicle.

Abstract: A device and a method for detecting phase in four-stroke engines, in which an electronic control unit (ECU) detects a spark current as a measuring signal and determines whether ignition occurred for ascertaining the compression cycles of the cylinders, whereby the electronic control unit is able to cause the injection to be performed in a correct phase relation.

Abstract: A method and an arrangement for detecting combustion misfires in internal combustion engines are presented where a measured ionic current signal is subjected to a floating short-time integration and a feature is formed which corresponds to the maximum value of the floating short-time integrator within the entire measuring window. The window length of the short-time integrator is shorter than the total measuring window and is floatingly displaced over the measuring window.

Abstract: A method and an arrangement for energy control on an ignition system for an internal combustion engine are presented having an ignition coil or an ignition transformer whose primary winding can be short circuited by means of a switch, called a short-circuit switch, the ignition coil forming the ignition voltage and having a primary winding and a secondary winding, and, an ion current can be measured with the secondary winding of the ignition coil by means of one or several spark plugs, the primary current in the short-circuit phase of the short-circuit switch is detected with a suitable means and is transmitted to the control unit, the measurement quantity is processed in the form of a function or filtering in the control unit after actuation of the short-circuit switch and an energy control via closure time or closure angle is built up with the obtained feature.