Variable force tensioner with internal reservoir technology primary bore

A variable force tensioner (VFT), comprising:

• a housing;
• a first bore disposed in the housing and having a bottom end;
• a primary piston slidably disposed in the first bore and including a low pressure chamber (LPC) disposed therein and a low pressure chamber to high pressure chamber (LPC to HPC) inlet connected at one end thereof, the primary piston creating a high pressure chamber (HPC) between a bottom portion thereof and the bottom end of the first bore when fluid is fed through the LPC to HPC inlet from the LPC;
• a spring disposed within the high pressure chamber and applying a bias on the primary piston away from the bottom end of the first bore;
• a check valve connected to the LPC to HPC inlet and configured to allow fluid to flow from the low pressure chamber to the high pressure chamber to force the primary piston to extend outward of the first bore;
• and
• a second bore disposed in the housing and including a second piston having a hollow interior, a second check valve and a second bore LPC to HPC inlet, the second check valve being connected between the second piston and the second bore LPC to HPC inlet to control the flow of fluid from the second bore LPC to HPC inlet to the hollow interior of the second piston to force the second piston to extend outward of the second bore.