Features/Functions:

1. The rocker arm is made of forged steel or ductile iron, with a T-shaped cross-section, which can reduce weight and provide sufficient rigidity. The ratio of the long and short arms of the rocker arm is 1.6, and the long arm is used to push the valve rod. The rocker arm ratio can reduce the maximum lift of the cam at a certain valve opening.

2. Change the direction of motion transmitted by the pushrod to drive the valve.