Patent ID: 6204569
Filing Date: 2001-03-20
Classification: B60R

Abstract:
A controller for a seatbelt tightener comprising an ignition circuit which carries an ignition current produced in the event of a crash to an igniter, wherein the ignition circuit is closed on buckling of the belt buckle and is opened on unbuckling of the belt buckle, the ignition circuit also forming a circuit in a monitoring circuit for operation of the igniter, wherein for monitoring the operation of the igniter on buckling of the belt buckle, a first circuit comprising the electric igniter is closed and a first test signal proportional to an electric internal resistance R1 of the igniter is scannable and in that a second circuit comprising a test resistance R2 can be closed on unbuckling the belt buckle and a second test signal proportional to the test resistance R2 is scannable.