CONTROL DEVICE FOR A GAS GENERATOR FOR CONTROLLING A VOLUMETRIC FLOW, AND IMPACT PROTECTION SYSTEM AND METHOD FOR OPERATING A CONTROL DEVICE OF THIS TYPE

A control device for a gas generator for controlling a volumetric flow of a fluid, which is stored under pressure, for filling an airbag of a motor vehicle, with a valve arrangement. To reduce a response time of a main valve piston, the valve arrangement has a means for controlling a fluid pressure in a control chamber, wherein the means for controlling a fluid pressure is configured to bring or hold the fluid pressure in the control chamber to/at a pressure which lies in a predefined tolerance range around an activation pressure of the main valve piston.