Diesel hammer pile driver

A pile-driving apparatus comprising:

• (a) a diesel hammer pile driver having a cylinder comprising a cylinder interior and a cylinder outside, a piston displaceably guided in the cylinder and comprising a piston face surface, and a striker displaceably guided in the cylinder, wherein the striker is disposed underneath the piston in an operating piston of the diesel hammer pile driver and comprises a striker face surface lying in the cylinder interior;
• (b) a fuel feed device;
• (c) a combustion chamber delimited axially by the striker face surface and the piston face surface and opening into the fuel feed device for introducing via the fuel feed device a predetermined amount of fuel into the combustion chamber during each working cycle;
• (d) a lower engagement cam disposed on the cylinder;
• (e) a disengagement apparatus disposed within the cylinder and axially displaceable along the cylinder on the cylinder outside to raise the cylinder, wherein the disengagement apparatus has a driver introducible into an undercut disposed in the piston through a recess made in the piston and an operating lever for pivoting the driver into the cylinder interior if a collision with the lower engagement cam occurs;
• and
• (f) a disengagement cam disposed on the cylinder above the lower engagement cam for pivoting the driver out of the cylinder interior if a collision of the operating lever with the disengagement cam occurs;
• wherein at least one of the lower engagement cam and the operating lever is configured for movement out of a collision region of the operating lever of the disengagement apparatus or of the lower engagement cam.