The hydraulic tensioner with two leakage gaps and a traction mechanism drive comprising an endless traction means

摘要

The invention relates to a hydraulic tensioner (1) for a belt drive or a chain drive of a motor vehicle, with a housing (2), on which an outer bulb (3) is movably supported, the outer bulb (3) a high-pressure chamber (4) together with the housing (2) is formed, wherein an inner piston (5), the inside of the outer bulb (3) is arranged so as to be movable and a reservoir (6) of the high-pressure chamber (4), with an outer leakage gap (7), which is designed such that a fluid exchange of hydraulic medium between the high-pressure chamber (4) and the environment (8) is permitted, and with an inner leakage gap (9), which is designed such that a fluid exchange of hydraulic medium between the high-pressure chamber (4) and the reservoir (6) is permitted, and the external leakage gap (7) and the inner leakage gap (9) are matched to one another so that by means of the inner leakage gap (9), a larger volume flow of hydraulic medium on the outside as a result of the leakage gap (7) is permitted. Furthermore, the invention relates to a traction mechanism drive comprising an endless traction means, wherein the endless traction means by means of a deflectable tensioning rail is guided, wherein the clamping rail with such a hydraulic tensioner (1) is brought into clamping contact is in, or can be brought.n="15"