Cylinder bore wall oil squirter, reciprocating engine embodying same and where the engine further embodies a rollerized cranktrain

Abstract

Featured is a cylinder wall oil delivery system for a reciprocating engine having at least one cylinder and at least one piston movably received in the cylinder as well as a reciprocating engine embodying such a cylinder wall oil delivery system. Such an oil delivery system includes a squirter that is fixably arranged in each cylinder so that oil is directed therefrom to two different areas of the cylinder wall. The squirter includes a first nozzle being orientated so the oil is directed to one of the two cylinder wall areas and a second nozzle being orientated so the oil is directed to the other of two cylinder wall areas. In particular embodiments, the squirter is arranged so the oil targets the piston skirt thrust and anti-thrust travel areas of the cylinder wall and so as to regulate the oil flow from each nozzle.

1 . A cylinder wall oil delivery system for a reciprocating engine having at least one cylinder and at least one piston movably received in the cylinder, said oil delivery system comprising:
 a squirter that is fixable arranged in a cylinder of a reciprocating engine so that oil is directed therefrom to two different areas of a cylinder wall; and   the squirter includes a first nozzle that is orientated so that oil is directed therefrom to one of the two areas of the cylinder wall and the second nozzle is orientated so that oil is directed therefrom to the other of the two areas of the cylinder wall.   
     
     
         2 . The cylinder wall oil delivery system of  claim 1 , wherein oil from the squirter provides cooling by oil spray wash-up. 
     
     
         3 . The cylinder wall oil delivery system of  claim 2 , wherein oil wash-down of the oil sprayed from the squirter further causes lubricant to be splashed onto the connecting rod bearings. 
     
     
         4 . The cylinder wall oil delivery system of  claim 1 , wherein the squirter is arranged in the cylinder so that the oil spray/jet targets a region of the cylinder wall corresponding to a piston skirt thrust travel area and a piston anti-thrust travel area. 
     
     
         5 . The cylinder wall oil delivery system of  claim 1 , wherein the squirter includes a sub-assembly including a first member and a second member that are joined together so as to form the first and second nozzles and wherein the first and second members are configured so as to regulate the flow from each nozzle. 
     
     
         6 . The cylinder wall oil delivery system of  claim 5 , wherein the first and second members are further configured so that the flow from each nozzle lies within a range of desired values. 
     
     
         7 . The cylinder wall oil deliver system of  claim 1 , further comprising a pressure regulator fluidly coupled to the squirter so that oil is delivered to the squirter when pressure of the oil exceeds a predetermine value. 
     
     
         8 . A reciprocating engine comprising:
 a block having at least one cylinder therein;   at least one piston, each of the at least one piston being movably received in the at least one cylinder;   a squirter that is fixably arranged in each of the at least one cylinder so that oil is directed therefrom to two different areas of the cylinder wall; and   wherein the squirter includes a first nozzle that is orientated so that oil is directed therefrom to one of the two areas of the cylinder wall and the second nozzle is orientated so that oil is directed therefrom to the other of the two areas of the cylinder wall.   
     
     
         9 . The reciprocating engine of  claim 8 , wherein the squirter is arranged in the cylinder so the oil spray/jet targets a region of the cylinder wall corresponding to a piston skirt thrust travel area and a piston anti-thrust travel area. 
     
     
         10 . The reciprocating engine of  claim 8 , wherein the squirter includes a sub-assembly including a first member and a second member that are joined together so as to form the first and second nozzles and wherein the first and second members are configured so as to regulate the flow from each nozzle. 
     
     
         11 . The reciprocating engine of  claim 5 , wherein the first and second members are further configured so that the flow from each nozzle lies within a range of desired values. 
     
     
         12 . The reciprocating engine of  claim 1 , further comprising a pressure regulator operably coupled to the squirter so that oil is delivered to the squirter when pressure of the oil exceeds a predetermined value. 
     
     
         13 . The reciprocating engine of  claim 8 , wherein the block further includes a number of cylinders selected from the group consisting of 4 cylinders, 6 cylinders, 8 cylinders, 10 cylinders and 12 cylinders and a number of pistons that corresponds to said number of cylinders. 
     
     
         14 . The reciprocating engine of  claim 8 , wherein the reciprocating engine is a four-stroke internal combustion engine. 
     
     
         15 . The reciprocating engine of  claim 8 , wherein the reciprocating engine is a two-stroke internal combustion engine. 
     
     
         16 . The reciprocating engine of  claim 8 , further comprising:
 a crankshaft;   at least one connecting rod operably coupled to said at least one piston and the crankshaft such that linear motion of the at least one piston in the at least one cylinder causes rotation of the crankshaft; and   a rolling element bearing rotatably supporting the crankshaft.   
     
     
         17 . The reciprocating engine of  claim 16 , further comprising:
 a second rolling element bearing that rotatably supports an end of the connecting rod from the crankshaft.