Automotive passenger restraint and protection apparatus
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United States of America Patent
Stats
-
Feb 2, 2010
Grant Date -
Jul 19, 2007
app pub date -
Mar 21, 2007
filing date -
Dec 16, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An automotive passenger restraint and protection apparatus for an automotive vehicle has a seatbelt and operates to restrain an occupant of the automotive vehicle by the seatbelt to protect the occupant. An electric retractor has a DC motor for retracting and protracting the seatbelt. An MPU applies voltage having a predetermined waveform to the DC motor, and then detects a waveform of current flowing to the DC motor. The MPU carries out fault diagnosis of the DC motor, based upon the detected waveform of current when the voltage having the predetermined waveform is applied to the DC motor. Thus, accurate fault diagnosis of the apparatus can be achieved.
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Family
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