In this paper, first, a new type of vehicle safety belt is developed based on a new clutch proposed as the key part of pretensioner of safety belt.

提出了一种作为安全带预紧器核心部件的新型离合机构，应用该机构开发了一套新型预紧式汽车安全带，介绍了它的结构组成、工作原理和性能。

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Load limiter, pretensioner and strap of a safety belt are primary factors which affect its protecting performance.

安全带中限力器、预张紧器、织带的性能参数是影响车辆安全带系统约束性能的主要因素。

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