many seat belt systems already incorporate a two-stage controllable load limiter (SLL). This represented a significant stride towards adaptability. To offer greater flexibility, ZF introduces itsZF has unveiled a new seatbelt system aimed at mitigating the consequences of accidents more effectively. Through its latest seatbelt system, ZF Passive Safety Systems aims to significantly enhance the adaptation of belt force limitation to the size and weight of vehicle occupants in the future.
The Multi-Stage Load Limiter (MSLL) serves as the key component responsible for individual system adjustment. It plays a crucial role in reducing accident consequences for all occupants and assists car manufacturers in meeting the heightened requirements outlined in the NCAP Roadmap 2030.
The innovative aspect of this technology not only lies in the individual control capabilities of the component itself but also in its expanded potential for interaction with other safety systems. This transforms the seatbelt, equipped with the MSLL switchable force limiter, into an intelligent, dynamically controllable safety mechanism.
Current restraint systems already engage in accidents at an early stage. Before impact, the belt tightens around the body (pre-tensioning) to minimize slack, decelerating it in a controlled manner post-impact and directing it towards the airbag. These systems are based on standardized test subjects (dummies).
Moving forward, the NCAP crash test will demand enhanced protection for individual vehicle occupants. Rudolf Stark, Head of ZF’s Passive Safety Technology Division, states, “The demands on the adaptivity of safety systems are increasing… Our new belt system simplifies the process for vehicle manufacturers to meet these heightened requirements and effectively mitigates accident consequences by better adapting to occupants.”
To reduce forces during accidents belt tensioner with multiple switchable load limiter (MSLL), featuring a multi-stage design to vary restraining forces more effectively throughout the crash. This system enables tailored responses to individuals of varying stature, adjusting belt forces accordingly.