| 摘要 |
PROBLEM TO BE SOLVED: To positively restrain and protect an occupant. SOLUTION: In the case of discriminating unavoidableness of a collision before the collision of a vehicle, an MPU increases the driving force of a DC motor to wind a seat belt (step S52) so as to increase the tension of the seat belt. In the case of detecting the collision of the vehicle, pretensioner mechanism rapidly winds the seat belt with the force of gas generated from a gas generating device (step S54) to increase the tension of the seat belt. |
