公开(公告)号：EP1062131B1

公开(公告)日：2001-10-24

申请号：EP99911728.6

申请日：1999-03-02

申请人： Conti Temic microelectronic GmbH

发明人： SKEDELJ, Jani DI ,  FENDT, Günter ,  FLERLAGE, Jörg ,  HERZ, Manfred ,  MÜLLER, Norbert ,  PETER, Wolfgang ,  SPIES, Hans

IPC分类号： B60R21/32

CPC分类号： B60R21/017

摘要： The invention relates to a method for operating an occupant safety device and to a control unit provided for carrying out the inventive method. In order to limit the power supplied from the storage element to a triggering means, the supplied electric power is measured after each triggering means has been actuated, and the power supply to the triggering means is interrupted after a determinable power limiting value has been reached. For this, known methods which use the voltage on the storage element as a measure of the supplied power are extremely substandard since they are dependent both on the charged state of the storage element and on the conductor resistance, thus leading to maloperations. The invention provides a simple and precise determination of the power supply in the triggering electric circuit of occupant safety devices in a manner which is independent of conductor resistance. To this end, instead of using the voltage, a value which is proportional to the square of the current flowing through the triggering means is integrated into an integral value and is compared to the power limiting value.