Reference Number: N 01-02
Inventors: Rao, V. Durga N.; Schafer, Gregory E.; Natkin, Robert J.
Accordingly, the present invention is a unique valve lifter for use in a valve train of an engine such as an internal combustion engine. In general, the valve lifter includes a lightweight valve lifter body having a cradle formed on one end thereof for receiving and supporting a roller therein. In addition, the peripheral surfaces of the valve lifter body may be impregnated with a solid film lubricant to reduce the friction between the valve lifter body and the valve lifter guide.
One advantage of the present invention is that the valve lifter is lightweight thus reducing the reciprocating mass and corresponding frictional forces generated by the valve spring. A further advantage of the present invention is that the reduced mass of the valve lifter permits higher engine operating speeds, and the reduced friction between the peripheral surfaces of the valve lifter and valve lifter guide results in reduced fuel consumption and oil consumption.