1 seat belt pretensioner function
defines a seat belt pretensioner function
refers to a seat belt pretensioner apparatus function as the vehicle speed changes suddenly occurs, play a major role and control means have pre-tensioning device retractor, can be tensioned strap about 0.1 seconds, to strengthen the binding of the occupant and the webbing lock preventing the occupant leans forward, the effective protection of the occupant safety.
a seat belt pretensioner function control apparatus has two
An electronic control unit, this auxiliary tightening belts normally used in combination with the airbag.
A mechanical control device, when the sensor detects an abnormal change in the acceleration of the vehicle, the excitation control means will work pretensioning device, which may be used alone tightening belts.
pre-tensioning device may take many forms, the common pre-tensioning means is a deflagration type, initiator by a gas, the gas generating agent, the conduit, piston, and the drive wheel ropes composition. It has a certain time, the expiration date must be replaced. If the car seat belts with pretensioners function, the car must wear, if you do not wear, once a collision, not only protected, but because of the seat belt generate pull-back action increases the likelihood of injury. Now tighten the seat belts with pre-function has been basically is $ 100,000 above the level of the standard car.