Title:
乗員保護装置制御装置およびソフトクラッシュ検出方法
Document Type and Number:
Japanese Patent JP4096465
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a passive safety device control system that can work more desirably according to the status of crashes than existent systems, and a soft crash detecting method. SOLUTION: In the event of a soft or less severe crash, longitudinal deceleration Gs of a vehicle body once rises and falls before surging up again. The time derivative of the deceleration dGs/dt fluctuates in accordance with the fluctuation of the deceleration Gs; the first maximal value dGmaximal appears against the initial rise/fall of the deceleration Gs and a larger time derivative value than the first maximal value dGmaximal appears later. Plotting the time derivative dGs/dt as a function of the deceleration Gs shows that the first maximal value dGmaximal is the maximal value of the time derivative dGs/dt when the deceleration Gs on the rise falls into an initial decline. Multiplying the first maximal value dGmaximal by a constant provides a threshold dGfire. A value on the time derivative dGs/dt in excess of the threshold dGfire results in a determination of a soft crash, which in turn inflates an air bag at a high rate.
Inventors:
Katsuji Imai
Norifumi Itada
Norifumi Itada
Application Number:
JP21904399A
Publication Date:
June 04, 2008
Filing Date:
August 02, 1999
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
B60R21/16; B60R22/46; B60R21/00
Domestic Patent References:
| JP3208749A | ||||
| JP47024573B1 | ||||
| JP5060777A | ||||
| JP11183513A | ||||
| JP10081197A |
Foreign References:
| WO1995012505A1 |
Attorney, Agent or Firm:
Kobe Norikazu
Haruyuki Ikeda
Michio Nakajima
Haruyuki Ikeda
Michio Nakajima