Apparatus and method responsive to vehicle jerk for actuating a passenger restraint system in a passenger vehicle
US4975850A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1989 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Nov 3, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R21/0132
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Apparatus and method are provided for actuating a passenger restraint system in a passenger vehicle. Vehicle deceleration is sensed and a vehicle condition signal is provided which varies in value with that of vehicle deceleration. The condition signal is differentiated to provide a jerk signal having a value which varies with the rate of change of the vehicle deceleration. A predetermined time period is timed only so long as the value of the condition signal exceeds that of a first threshold level. A second signal is provided so long as the value of the jerk signal exceeds that of a jerk threshold level. A trigger signal is provided for actuating the restraint system only when the second signal occurs during the predetermined time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.