Pressure reservoir for exerting pressure on a hydraulic system with which preferablya gas exchange valve of an internal combustion engine is actuated

摘要

A pressure reservoir is used to exert pressure on a hydraulic system. With the hydraulic system, a gas exchange valve, for instance, of an internal combustion engine can be actuated. The pressure reservoir (62) includes a housing (64, 68) and a piston (72) that is prestressed in operation by a device (88, 90). To enable making the pressure reservoir (62) as small as possible, it is proposed that the device (88, 90) which prestresses the piston (72) of the pressure reservoir (62) has a characteristic force-travel curve, in one range of motion of the piston (72), that has a slope which differs from the slope in a different range of motion of the piston (72).