Side impact air bag system

摘要

In a side impact air bag system, first and second vent holes (16, 18) reduce the pressure of a part (11) opposite a passenger's chest to a lower value than that of a part (13) opposite the passenger's abdomen when the air bag (7) is inflated. The vent holes are provided on a side surface of an upper inflation unit (5) opposite to the passenger, for regulating gas discharge of the part (11) opposite the chest while preventing early discharge of the gas, always obtaining a desired internal pressure and inflation condition, positively inflating the bag (7) and relaxing any shock on the chest. The vent holes (16, 18) are formed at positions which are not in contact with structural parts of the vehicle compartment, thereby preventing them from being obstructed even when the structural parts are deformed toward the inside of the compartment, eliminating disturbance to gas discharge when the bag (7) is inflated, and always obtaining the desired internal pressure condition.