Abstract: A diagnostic device for the starter of a combustion engine is provided. The electrical system of a motor vehicle includes a battery in whose connecting line a battery disconnect switch is provided, and the electrical system of the motor vehicle is monitored by a vehicle electrical system state detection device which includes starter diagnostic functionality.

Abstract: A method for influencing exhaust-gas characteristics of a motor vehicle having a combustion engine in which the exhaust-gas composition and/or the exhaust-gas temperature are/is influenced with the aid of an emission management system that includes a control device having an emission management algorithm and at least one control element. The exhaust-gas values are able to be optimized, and the fuel consumption lowered if the generator output is increased or lowered by the emission management system within the framework of an emission management measure.

Abstract: A diagnostic device for the starter of a combustion engine is provided. The electrical system of a motor vehicle includes a battery in whose connecting line a battery disconnect switch is provided, and the electrical system of the motor vehicle is monitored by a vehicle electrical system state detection device which includes starter diagnostic functionality.

Abstract: A method and a device for determining the state of a vehicle battery in which the battery voltage is measured and information regarding the state of the vehicle battery is derived from the measured battery voltage by means of an integration procedure. A variable weighting factor is taken into account in the integration procedure.

Abstract: A method for stabilizing the voltage in an energy-supply system, particularly in a motor-vehicle electrical system, that is fed by a battery and a generator. If the battery is weak or has completely failed, switching in a new consumer may lead to a voltage dip in the system. To prevent this, it is proposed as a precaution to switch in a consumer not needed at the moment. If, at this point, a new consumer is to be switched in, the consumer switched in as a precaution is automatically disconnected, and the excess energy therefrom is switched over to the new consumer.

Abstract: A method and a device for determining the state of a vehicle battery in which the battery voltage is measured and information regarding the state of the vehicle battery is derived from the measured battery voltage by means of an integration procedure. A variable weighting factor is taken into account in the integration procedure.

Abstract: The present invention a method for stabilizing the voltage in an energy-supply system, particularly in a motor-vehicle electrical system, that is fed by a battery (1) and a generator (2). If the battery is weak or has completely failed, switching in a new consumer (3, 4, 5) may lead to a voltage dip in the system. To prevent this, it is proposed as a precaution to switch in a consumer (3) not needed at the moment. If, at this point, a new consumer (4) is to be switched in, the consumer (3) switched in as a precaution is automatically disconnected, and the excess energy therefrom is switched over to the new consumer (4).