Connecting rod and bearing assembly therefor

In combination:

• a reciprocably movable connecting rod having a cylindrical crank pin hole defined by a wall and a wrist pin hole spaced apart therefrom, said crank pin hole having a circumferentially extending oil groove formed in one side of said wall nearest said wrist pin hole, said wall having an opposite side, said connecting rod further comprising an oil passage communicating between said oil groove and said wrist pin hole;
• a rotatable crank shaft having a cylindrical crank pin disposed in said crank pin hole, said crank pin having a first axially extending oil flow passage and a transversly extending second oil flow passage communicating with said first oil flow passage, said second oil flow passage having circumferentially spaced apart oil supply ports at the outer surface of said crank pin;
• and bearing means disposed in said crank pin hole and around said crank pin and comprising:
• first and second semi-circular bearing sections disposed between said crank pin and said one side and said opposite side, respectively, of said wall of said crank pin hole in said connecting rod, each bearing section having a smooth inner surface;
• said first bearing section having oil well recesses formed at opposite ends in said inner surface thereof for communicating with said oil supply ports on said crank pin, said first bearing section also having oil feed holes therethrough near said opposite ends thereof for communicating between said oil supply ports and said oil groove in said wall of said crank pin hole;
• and said second bearing section having a circumferentially extending groove formed in said smooth inner surface thereof with groove ends communicating with said oil well recesses in said first bearing section and for communicating with said oil supply ports on said crank pin;
• said crank pin being movable during rotational movement of said crank shaft and reciprocating movement of said connecting rod to cause oil present in said oil well recesses to be drawn therefrom by hydrodynamic lubrication into a load bearing zone between said first bearing section and said crank pin.