Method and device for determining a characteristic quantity for detecting the onboard supply system stability

The invention relates to a device and to a method for determining a characteristic quantity (Umin) for detecting the onboard supply system stability, comprising the following steps: detecting when the engine starts, measuring the battery voltage (Umin) during the starting process of the engine, calc...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	MOTZ, JUERGEN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PERFORMING OPERATIONS PHYSICS TESTING TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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Beschreibung
Zusammenfassung:	The invention relates to a device and to a method for determining a characteristic quantity (Umin) for detecting the onboard supply system stability, comprising the following steps: detecting when the engine starts, measuring the battery voltage (Umin) during the starting process of the engine, calculating a corresponding starting current (lmax) from the measured battery voltage (UminStart) using a battery model (12), determining at least one characteristic quantity (Umin) in the form of a prediction of an onboard supply system voltage to be expected using the battery model (12) and the calculated starting current (lmax).