US00RE36122E [ii] E Patent Number: Re. 36,122
 Reissued Date of Patent: Mar. 2, 1999
 METHOD FOR CONTROLLING THE RELEASE OF PASSENGER RESTRAINT SYSTEMS
 Inventors: Bernhard Mattes, Sachsenheim;
Werner Nitschke, Ditzingen; Willi
Kuhn. Markgroningen; Wolfgang
Drobny. Besigheim; Hugo Weller,
Beilstein; Peter Taufer, Renningen. all
of Germany; Edmund Jeenicke.
Luxembourg. Luxembourg; Klaus
Germany; Michael Henne, Altdorf,
Germany; Wilfried Burger,
 Assignee: Robert Bosch GmbH. Stuttgart,
 Appl. No.: 7973S
 Filed: Feb. 7, 1997
Related U.S. Patent Documents
 Patent No.: 5,014,810
Issued: May 14,1991
Appl. No.: 458,239
Filed: Dec. 28,1989
 Continuation of Ser. No. 516,730, Aug. 18, 1995, abandoned, which is a continuation of Ser. No. 300,094, Sep. 1, 1994, abandoned, which is a continuation of Ser. No. 999,030, Dec. 31, 1992, abandoned.
 Foreign Application Priority Data
Feb. 18, 1989 PE] Germany 39 05 052.1
Jul. 25, 1989 PE] Germany 39 24 507.1
 Int. CI.6 B60R 21/00
 U.S. CI 180/268; 280/802; 280/806
 Field of Search 280/728.1,731,
280/735. 801.1, 802, 806; 180/282, 268, 269. 270; 307/10.1
 References Cited
U.S. PATENT DOCUMENTS 3,870,894 3/1975 Brede et al. .
In a method for controlling the release of a passenger restraint system in a vehicle, an acceleration signal is measured and integrated with respect to time to obtain a velocity signal. A release threshold value for the velocity signal is determined. If the velocity signal then falls below the release threshold value, thus indicating a vehicle collision, the passenger restraint system is released. The release threshold value is controlled depending on the type of accident situation and upon the operating parameters of the vehicle to increase the release sensitivity of the passenger restraint system. For example, the release threshold value is adjusted based on the value of the velocity signal. If the velocity signal decreases in value, then the release threshold is lowered to a more sensitive value.
48 Claims, 11 Drawing Sheets