BIS systems provide better belt fit, better belt access and greater sellekchem comfort to the occupants and therefore add to customer satisfaction. A seat belt retractor may be incorporated in a seat back.Design targets for BIS systems for optimal occupant protection were among others studied by Ford Motor Company . Also in case of a BIS Inhibitors,Modulators,Libraries system, the stiffness of the seat and the floor underneath the seat plays Inhibitors,Modulators,Libraries a significant role in protection for frontal impact situations. The operation of a prototype BIS system, equipped with a belt pretensioner, load limiting retractor and additional dual stage driver airbags, was investigated by using computer simulations with the simulation package MADYMO .
Seat excursion, referred to as the total forward displacement of the shoulder belt upper anchor relative to the vehicle, was shown to be an important parameter to optimize the BIS system and should be limited. Proper structural design of the seat, seat attachment Inhibitors,Modulators,Libraries and structural design of the floor were indicated as the key parameters to influence seat excursion. Inhibitors,Modulators,Libraries When choosing seat excursion as a design parameter, it is important to make a distinction between the contribution to excursion of the seat and its underlying structure. Since seat excursion is also dependent on vehicle pulse and pitch, the design targets of seat/floor stiffness cannot be generic for all types of vehicles. Proper selection of belt retractor, airbag vent size and dual stage inflator��s lag time contribute to lower injury values.2.2.
CG Type Emergency Lock in Conventional Seat Belt SystemsIn recent seat belt systems, a CG type emergency lock is installed in the combination of retractor as a part of seat belt. The basic function of a CG type emergency lock is to tighten the belt when the car body inclines over AV-951 a permissible angle (12?27��). A typical CG type lock unit consists of three main parts (Figure 2): a ball cup (A) is attached at the B-pillar for adjusting the relative static angle of the car body, a steel ball (B) is in the ball cup to adjust the absolute angle of gravity, and the pawl mechanism locks (C) the belt when the ball slides over the hall. These three parts are combined to form a complete CG type emergency lock unit.Figure 2.Schematic of a CG type emergency lock.The complete CG type emergency lock is attached to the B-pillar by the retractor unit.
The motion of a kinase inhibitor Pacritinib CG type emergency lock unit is shown schematically in Figure 3. During the first phase, as shown in Figure 3, the upper pawl of the CG type emergency lock does not move, thereby the belt moves freely. Whereas during the second phase, the upper pawl does move, thereby the belt is locked by the force of the gear tooth in the retractor unit. When the car is in the state of rollover accident, the CG type emergency lock goes to the second phase depending on the permissible angle.