Activation device for passenger protection apparatus
US6978200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2003 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Dec 16, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2021/01327
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An activation device for a passenger protection apparatus is made up of a sensor for detecting a roll angular velocity of a vehicle, a unit for calculating a roll relative angle on the basis of the roll angular velocity, and a unit for making a judgment indicating a roll of the vehicle when the velocity and the angle satisfy a threshold condition. A control unit activates an air bag when making a judgment indicating a roll. A vehicle collision state is discriminated on the basis of right-hand and left-hand accelerations detected by acceleration sensors and the threshold condition for the judgment on a roll of the vehicle is switched in accordance with the collision state. This enables a trip-over type roll to be detected at an early stage for activating the passenger protection apparatus quickly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.