howseatbeltswork安全帶工作原理(完整版)
【正文】 ioners pull the entire retractor mechanism backward and some rotate the spool itself ? They are the same central control processor that activates the car’s air bags Pretensioners ? Processor monitors mechanical or electronic motion sensors that respond to sudden deceleration of impact ? Pretensioners built around electric motors or solenoids ? Popular designs today pyrotechnics When the gas is ignited, the pressure pushes the piston up to rotate the retractor Pretensioners ? Central element – bustible gas ? When collision detected, it immediately applies electrical current across electrodes ?
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