Patent ID: 7347445
Filing Date: 2008-03-25
Classification: B60R

Abstract:
1. A vehicle airbag device equipped with an auxiliary chamber comprising: an impact sensor that detects an impact applied to a vehicle in the event of an accident; a seatbelt sensor for sensing whether a front passenger's seatbelt is fastened; a seat position sensor for sensing the position of a front passenger seat along a seat rail; an inflator unit having a first inflator and a second inflator which supply a gas; an airbag having a base chamber with at least one inner vent hole formed therein facing a passenger so that the airbag is unfolded and inflated by the gas supplied by the first inflator, and an auxiliary chamber which is installed on the side of the base chamber facing the passenger, and which receives the base chamber at an inner side of the auxiliary chamber and which is configured to receive the gas from the second inflator and to be connected with the inner vent hole; and a controller that operates the airbag according to a signal detected from the impact sensor, and that controls the operation of the first inflator and the second inflator according to the combination of whether the seatbelt sensor senses that the front passenger's seatbelt is fastened and the seat position detected by the seat position sensor, wherein the auxiliary chamber is provided with a duct for supplying the gas generated from the second inflator so that left and right parts of the airbag are unfolded first and a central part is unfolded last upon inflation of the airbag device.