Abstract: A device for ignition control in a cylinder of an internal combustion engine includes an ignition coil which has a connected primary winding and a secondary winding, which is connected to a spark plug. The device also includes an ignition control unit, which connects the primary winding by way of a first line and is connected to the secondary winding by way of a second line. The second line supplies an ionic current signal emitted from the spark plug to the ignition control unit. A single line is used as the first line and the second line. The active direction of the line can be adjusted by different levels of voltage applied to the line.

Abstract: A process is provided for ignition control in a cylinder of an internal combustion engine, using an ignition coil which has a connected primary winding and a secondary winding which is connected to a spark plug, and an ignition control unit which is used to control circuit logic connecting the primary winding by means of a line. According to the process, at the beginning of a working cycle, a switching signal is transmitted from the ignition control unit to the circuit logic, marking the beginning of the working cycle, and the temporal length of the signal is used as a reference length (idle time) for other digital information transmitted to the circuit logic by the ignition control unit.

Abstract: A process is provided for ignition control in a cylinder of an internal combustion engine, using an ignition coil which has a connected primary winding and a secondary winding which is connected to a spark plug, and an ignition control unit which is used to control circuit logic connecting the primary winding by means of a line. According to the process, at the beginning of a working cycle, a switching signal is transmitted from the ignition control unit to the circuit logic, marking the beginning of the working cycle, and the temporal length of the signal is used as a reference length (idle time) for other digital information transmitted to the circuit logic by the ignition control unit.

Abstract: A device for ignition control in a cylinder of an internal combustion engine includes an ignition coil which has a connected primary winding and a secondary winding, which is connected to a spark plug. The device also includes an ignition control unit, which connects the primary winding by way of a first line and is connected to the secondary winding by way of a second line. The second line supplies an ionic current signal emitted from the spark plug to the ignition control unit. A single line is used as the first line and the second line. The active direction of the line can be adjusted by different levels of voltage applied to the line.

Abstract: The invention relates to a device and a method for testing a tank ventilation system with a tank ventilation valve in a motor vehicle, comprising an engine speed sensor, an air flow sensor and/or an idle controller for providing an air mass signal, as well as an evaluating unit, which compares the changes in speed and air masses with at least one threshold value when the tank ventilation valve is opened and closed. To improve the diagnosis of the tank ventilation system, it is proposed that the evaluating unit be designed in such a manner that a total reaction value, which is compared with a threshold value, is formed from the engine speeds when the tank ventilation valve is opened and closed as well as the air masses when the tank ventilation valve is closed and opened.

Abstract: The invention relates to a device and a method for testing a tank ventilation system with a tank ventilation valve in a motor vehicle, comprising an engine speed sensor, an air flow sensor and/or an idle controller for providing an air mass signal, as well as an evaluating unit, which compares the changes in speed and air masses with at least one threshold value when the tank ventilation valve is opened and closed.