Method for suppressing deployment of an inflatable restraint based on sensed occupant weight
US6850825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2002 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | May 10, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R21/0155
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved method of selectively suppressing deployment of a vehicular inflatable restraint utilizes dynamic variation in the apparent weight of a vehicle occupant to infer a free mass of the seat occupant. The free mass of the occupant is inferred by filtering out portions of a weight-responsive signal due to occupant position adjustment and inferring the occupant free mass based on the variation of the apparent weight with respect to the variation in vertical acceleration of the vehicle. The decision to allow or suppress deployment of the restraint is determined based on a comparison of the static weight reading with at least one threshold, and the occupant free mass is used to adjust the threshold in a direction to minimize the overall variability of the system. Measures of the seat belt tension and the seat temperature are also be used to adjust the threshold in a direction to minimize system variability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.