| 摘要 |
The invention relates to a device (1) for controlling a volumetric flow rate of a medium stored under pressure in order to activate an impact protection device, comprising a control module (20), which comprises a valve body (22) with a stepped through-opening (22.3) and a control piston (26) that is axially guided in the through-opening (22.3) of the valve body (22), and comprising a control valve (10), which influences the movement of the control piston (26). The valve body (22) has a closable media inlet opening (28) with a valve chamber (22.4) at a first end and a control chamber (22.5) with a control valve opening (24.2) at a second end. At least one discharge channel (22.1) which branches off from the through-opening (22.3) for discharging the medium into the impact protection device is arranged between the first and second end of the valve body (22). The control piston (26) has a through-opening (26.3), which is formed along the main axis of extension of the control piston, from a first active surface (26.1) facing the media inlet opening (28) to a second active surface (26.2) facing the control valve opening (24.2). The first active surface (26.1) is smaller than the second active surface (26.2), and the control piston (26) can be moved in the through-opening (22.3) of the valve body (22) between a first position, in which the at least one discharge channel (22.1) is closed by the control piston (26), and a second position, in which the at least one discharge channel (22.1) is released by the control piston (26), by means of the medium and dependent on the position of the control valve (10). According to the invention, the control valve (10) and the control module (20) are arranged in a common housing sleeve (3), the valve body (22) of the control module (20) is pressed into a first end (3.1) of the housing sleeve (3) until the valve body strikes a housing shoulder (3.3), and the control valve (10) is introduced into and fixed in a second end (3.2) of the housing sleeve (3). |
