The results indicate that a pretensioner can significantly improve the ride-down efficiency of occupant in a crash by eliminating the initial slack of seatbelt, and hence reduce the injury responses.

• 计算结果表明，利用预紧器消除安全带的初始松弛量，可显著提高乘员的非约束系统效率，并有效降低人体损伤值；