High pressure oil manifold for a diesel engine

Abstract

A cast oil manifold ( 10 ) has entrance openings ( 28 ) from a reservoir ( 18 ) to cast-in gooseneck outlet tubes ( 16 ) that are substantially elliptical, enabling less material to be used in the vicinity in comparison to the amount of material used when the openings are circular.

1 . A diesel engine comprising:
 combustion chambers that are fueled by introducing pressurized oil into fuel injectors to cause the fuel injectors to inject fuel,   and a cast oil manifold comprising a walled body enclosing a reservoir for holding pressurized oil and cast-in outlet tubes through which oil in the reservoir is delivered to the fuel injectors,   the cast-in outlet tubes comprising walls that wrap around portions of the walled body, each outlet tube having an entrance at the reservoir and an exit leading to a respective fuel injector, and each entrance having a substantially elliptical transverse cross section.   
   
   
       2 . A diesel engine as set forth in  claim 1  in which the exit of each outlet tube has a circular transverse cross section. 
   
   
       3 . A diesel engine as set forth in  claim 1  in which the outlet tubes are disposed at intervals along a long dimension of the walled body, and as the oil manifold is viewed radial to that long dimension, the entrance of each outlet tube is offset from its exit in the direction of the long dimension of the walled body. 
   
   
       4 . A diesel engine as set forth in  claim 1  in which the entrance of each outlet tube is arranged such that an imaginary line passing through the center of its substantially elliptical transverse cross section perpendicularly intersects a central axis of the long dimension of the reservoir. 
   
   
       5 . An oil manifold for a diesel engine having combustion chambers that are fueled by introducing pressurized oil into fuel injectors to cause the fuel injectors to inject fuel, the manifold comprising:
 and a casting comprising a walled body enclosing a reservoir for holding pressurized oil and cast-in outlet tubes through which oil in the reservoir is delivered to the fuel injectors,   the cast-in outlet tubes comprising walls that wrap around portions of the walled body, each outlet tube having an entrance at the reservoir through which oil in the reservoir enters the outlet tube and an exit through which oil exits the casting, each entrance having a substantially elliptical transverse cross section.   
   
   
       6 . An oil manifold as set forth in  claim 5  in which the exit of each outlet tube has a circular transverse cross section. 
   
   
       7 . An oil manifold as set forth in  claim 5  in which the outlet tubes are disposed at intervals along a long dimension of the walled body, and as the oil manifold is viewed radial to that long dimension, the entrance of each outlet tube is offset from its exit in the direction of the long dimension of the walled body. 
   
   
       8 . An oil manifold as set forth in  claim 5  in which the entrance of each outlet tube is arranged such that an imaginary line passing through the center of its substantially elliptical transverse cross section perpendicularly intersects a central axis of the long dimension of the reservoir.