Method and apparatus for determining symmetric and asymmetric crash events with improved misuse margins
US7359781B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2004 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Mar 16, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R21/01562
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An apparatus (10) for controlling a multistage actuatable occupant restraining system (14, 18) of a vehicle includes a crash sensor (32) sensing crash acceleration at a substantially central location of the vehicle. A crush zone accelerometer (40, 42) is provides a crush zone crash acceleration signal. A controller (50) a crash velocity value and a crash displacement value in response to the crash acceleration signal. A plurality a predetermined crash velocity as a function of crash displacement threshold maps (152-172) is provided, two of the plurality of threshold maps (170, 172) relating to a second stage (92, 96) of said multistage actuatable occupant restraining system. The selects one of the two threshold maps relating to the second stage of in response to the crush zone acceleration signal and controls second stage actuation in response to a comparison of the crash velocity signal against the selected one of the two threshold maps (170, 172). Improved misuse margins are also provided as well as deployment mappings based on symmetric and asymmetric crash detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.