Hydraulic traction mechanism tensioner including a pressure regulator

A hydraulic traction mechanism tensioner for a traction mechanism drive of a motor vehicle, the traction mechanism tensioner comprising:

• a housing;
• a tensioning piston displaceably supported within the housing in an axial direction and enclosing a hydraulic pressure chamber together with the housing;
• and
• a valve inserted into a fluid supply channel of the housing and including an actuating element, the valve hydraulically connecting a first channel section of the fluid supply channel opening into the hydraulic pressure chamber to a hydraulic supply in a first position of the actuating element and disconnecting the first channel section from the hydraulic supply in a second position of the actuating element, the valve being designed as a pressure control valve, the actuating element being movable beyond the second position into another, third position, so that a volume of the first channel section is increased in comparison to the second position, the first channel section being permanently disconnected from the hydraulic supply in a displacement range of the actuating element between the second position and the third position.