Restraint deployment control method with feed-forward adjustment of deployment threshold
US6430489B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1998 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Mar 26, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2021/01322
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved deployment method for a vehicular supplemental restraint system having an acceleration sensor and a restraint device to be deployed for occupant protection in a crash event, where the deployment threshold is adaptively adjusted based on the magnitude and rate of change of a filtered acceleration signal and the progression level of the sensed event. The deployment threshold is periodically adjusted based on the rate of change of the filtered acceleration signal, if the magnitude of the filtered acceleration signal is within a range specified for the progression level of the sensed event. The maximum amount of adjustment is also specified based on the progression level of the event. As a result, the deployment threshold tends to follow or track the filtered acceleration signal, particularly for non-deployment events where the magnitude of the filtered acceleration signal is within the specified range, thereby preventing deployment of the restraints. In deployment events, the magnitude of the filtered acceleration signal is more likely to fall outside the specified range, which minimizes feed-forward adjustment of the deployment threshold, thereby minimizing any delay in d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.