DEVELOPMENT OF A SWITCHING ROLLER FINGER FOLLOWER FOR CYLINDER DEACTIVATION IN INTERNAL COMBUSTION ENGINES
A rocker arm includes an outer arm having a first side and a second side, an inner arm positioned between the first side and the second side of the outer arm, a pivot axle pivotally coupling the inner arm and the outer arm at a first end of each of the inner arm and the outer arm, and a latch having a first position and a second position. The latch in the first position pivotally fixes the inner arm and the outer arm at a second end of each of the inner arm and the outer arm, and in the second position allows the inner arm and the outer arm to pivot independently. The latch is responsive to hydraulic pressure in a hydraulic fluid passage to selectively move to other of the first position and the second position. A lost motion spring is coupled to the inner arm.
1 . A rocker arm, comprising:
an outer arm comprising a first side and a second side;
an inner arm disposed between the first side and the second side of the outer arm;
a pivot axle pivotally coupling the inner arm and the outer arm at a first end of each of the inner arm and the outer arm;
a latch having a first position and a second position, wherein the latch in the first position pivotally fixes the inner arm and the outer arm at a second end of each of the inner arm and the outer arm, and in the second position allows the inner arm and the outer arm to pivot independently;
a first biasing member urging the latch into one of the first position and the second position, a hydraulic fluid passage hydraulically coupled to the latch, and wherein the latch is responsive to hydraulic pressure in the hydraulic fluid passage to selectively move to other of the first position and the second position; and
a lost motion spring operationally coupled to the inner arm.