Automatic lash adjuster for use with high compression internal combustion engines

1) An internal combustion engine comprising:

• an engine block at least partially defining a cylinder;
• a piston at least partially positioned within the cylinder and configured to move with respect to the cylinder;
• a cylinder head coupled to the engine block and at least partially enclosing the cylinder, the cylinder head defining a first runner open to the cylinder and a second runner open to the cylinder;
• a first valve mounted to the cylinder head and configured to move between an open position, in which the first runner is in fluid communication with the cylinder, and a closed position, in which the first runner is fluidly isolated from the cylinder;
• a second valve mounted to the cylinder head and configured to move between an open position, in which the second runner is in fluid communication with the cylinder, and a closed position, in which the second runner is fluidly isolated from the cylinder;
• a valve bridge extending between and in contact with the first valve and the second valve;
• a first cam lobe with a profile corresponding to positive power operation;
• a second cam lobe with a profile corresponding to engine braking operation;
• a hydraulic lash adjuster is configured to selectively transmit force between the valve bridge and one of the first cam lobe and the second cam lobe, wherein the hydraulic lash adjuster is a normally open lash adjuster.