A vehicle occupant protection system includes an inflatable vehicle occupant restraint device positioned in the vehicle, and a gas generating system coupled to the inflatable restraint device for providing inflation fluid to inflate the vehicle occupant restraint device. The objective lens has an angle of view of 100\xb0 or greater, and comprises a positive first group G1, a negative second group G2 and a positive third group G3. The privacy enclosure includes a compartment within which a toilet may be located. In order to compensate a stroke reduction generated as the operaiton frequency is increased by as much the certain value, the voltage applied to the motor is increased by as much as a certain level according to the increased operation frequency, thereby performing an overload operation.