Patent ID: 8534244
Filing Date: 2013-09-17
Classification: F01L,Y10T

Abstract:
1. A method for varying the phase and lift of a rocker arm on a camshaft actuating a valve or injector, the method comprising the steps of: (a) pivotably connecting the rocker arm to a pivot shaft, wherein a roller on a first end of the rocker arm rotatably engages with a cam, and a second end of the rocker arm slidably engages with the valve or injector; (b) from a zero phase position of the roller in respect to a base circle of the cam, advancing an actuator connected to a control arm, causing the control arm to slide against an upper surface of a first curved cap and causing the pivot shaft to rotate against a lower surface of the first curved cap in a first direction about an imaginary axis to an advanced phase position thereby advancing a timing of the valve or injector; (c) from the advanced phase position, reversing the actuator, causing the pivot shaft to slidably rotate against the lower surface of the first curved cap in a second direction about the imaginary axis to a retarded phase position thereby retarding the timing of the valve or injector; wherein a radius of curvature of the lower surface of the first curved cap is coincident with the imaginary axis.