Efficient oil treatment for radial engine

Abstract

A radial engine lubrication device is disclosed. The device includes at least one lubricant supply pump and a crankcase. The crankcase has a first cavity and a second cavity. The device includes a first flow path extending through at least one master rod of a rotating assembly. The lubricant is supplied from the lubricant supply pump, through the first flow path and exits into the first cavity. A second flow path extends internally through at least one wall of the crankcase and the device further includes at least one scupper extending into the first cavity and fluidly connecting the first cavity with the second cavity.

1 . An engine lubrication device, comprising:
 at least one lubricant supply pump;   a crankcase having a first cavity and a second cavity;   a first flow path extending through at least one master rod of a rotating assembly, wherein lubricant is supplied from the at least one lubricant supply pump, through the first flow path exiting into the first cavity;   a second flow path extending internally through at least one wall of the crankcase; and   at least one scupper extending into the first cavity and fluidly connecting the first cavity with the second cavity.   
     
     
         2 . The device of  claim 1 , wherein the scupper is integral to the crankcase and includes a scoop portion for directing the lubricant from the first cavity to the second cavity. 
     
     
         3 . The device of  claim 1 , wherein the first flow path has a flow rate and flow pressure higher than a flow rate and flow pressure in the second flow path. 
     
     
         4 . The device of  claim 3 , wherein the first path flow rate ranges from 6-14 GPM with a pressure range of 90-125 PSI, and the second path flow rate ranges from 6-11 GPM with a pressure range of 30-80 PSI. 
     
     
         5 . The device of  claim 1 , wherein the rotating assembly includes a crankshaft, rotatively connected to a first end of the master rod, at least one link rod rotatively connected to the first end and a plurality of pistons rotatively connected to a second end on the master rod and a second end on the at least one link rod, the rotating assembly pistons configured for positioning within a plurality of cylinders attached radially outward to the crankcase first cavity. 
     
     
         6 . The device of  claim 5 , further comprising a piston sprayer configured in the second end. 
     
     
         7 . The device of  claim 1 , further comprising an external lubricant treatment system fluidly connected to at least one of the rotating assembly and the lubricant galley, the external lubricant treatment system including at least one of a reservoir, fluidly connected to a cooling element, at least one bypass valve, at least one priming pump, at least one scavenge pump and at least one check valve. 
     
     
         8 . The device of  claim 7 , wherein the at least one bypass valve is a temperature controlled bypass valve, the bypass valve directs lubricant at a predetermined temperature into the cooling element. 
     
     
         9 . The device of  claim 5 , wherein the second flow path fluidly connects at least one hydraulic lifter to a corresponding rocker arm configured in a cylinder head attached to the cylinder. 
     
     
         10 . The device of  claim 5 , further comprising at least one bull nose counter weight boat configured for floating attachment on the crankshaft. 
     
     
         11 . The device of  claim 1 , further comprising at least one integral hydraulic lifter boss integrally formed on the crankcase and machined adjacent the second cavity in the crankcase. 
     
     
         12 . The device of  claim 5 , wherein the crankshaft crank pin includes a micro-polish surface finish. 
     
     
         13 . The device of  claim 12 , wherein the crank pin includes at least one of a maximum allowable taper across the pin in the range of 0.0025 mm-0.015 mm, and a maximum allowable surface change in the range of 0.001 mm-0.005 mm within a 10° of rotation. 
     
     
         14 . The device of  claim 12 , wherein the crank pin includes a crank pin diameter range of approximately 82 mm to 97 mm. 
     
     
         15 . The device of  claim 12 , wherein the crank pin includes a crank pin length range of approximately 73 mm to 84 mm. 
     
     
         16 . A radial engine lubrication treatment system, comprising:
 a radial engine crankcase having a first cavity and a second cavity, the radial engine including a wall dividing the first cavity and the second cavity;   a rotating assembly configured to engage a plurality of apertures positioned in an outer crankcase circumference, the outer circumference is configured to receive a plurality of cylinder assemblies;   wherein the rotating assembly includes at least one flow path extending through a crankshaft and exiting through a second end of at least one rod rotatively attached to the crankshaft; and   at least one scupper on the wall, the scupper configured to fluidly connect and vent the first cavity to the second cavity.   
     
     
         17 . The system of  claim 16 , further comprising:
 an external supply reservoir;   at least one supply side check valve fluidly connected to the reservoir;   at least one priming pump fluidly connected to a supply side valve and the reservoir;   at least one delivery pump fluidly connected to at least one of the supply side valve, the reservoir and the priming pump;   at least one delivery line fluidly connected to the crankshaft and to the delivery pump and an lubricant galley line; and   at least one lubricant scavenge pump.   
     
     
         18 . The system of  claim 16 , wherein the crankshaft includes a crank pin having a maximum of approximately 7-20 lobe changes allowed with no height change greater than approximately 0.0010 mm-0.0020 mm. 
     
     
         19 . The system of  claim 17 , further comprising at least one oil galley access port configured in the crankcase. 
     
     
         20 . The system of  claim 16 , further comprising at least one bull nose counter weight boat configured for floating attachment on the crankshaft.