text: the phase timed camshaft spray lubrication system is shown in fig1 . disposed within crankcase 10 is a piston 12 , a crankshaft 14 , a camshaft 16 , and an oil sump 18 . crankcase 10 defines a piston chamber 20 within which piston 12 moves , and an oil gallery system 22 . wrist pin 24 is rotatably disposed within piston 12 , and is pivotally attached to connecting rod 26 which couples piston 12 to crankshaft 14 . crankshaft 14 is rotatably disposed within crankcase 10 and has a journal portion 28 which is attached to bearing portion 30 of connecting rod 26 . disposed on both sides of journal portion 28 on crankshaft 14 are counterweights 32 . a cross drilled crank pin balance hole 34 extends through journal portion 28 to further lighten the portion of crankshaft 14 opposite counterweights 32 . also disposed on crankshaft 14 is a crankshaft gear 36 , which is operably engaged with camshaft gear 38 . the gear ratio between gears 36 and 38 provide for crankshaft 14 to have a rotational velocity twice that of camshaft 16 . camshaft 16 is also rotatably disposed within crankcase 10 , having an axis generally parallel to the axis of crankshaft 14 . outwardly disposed on camshaft 16 are cams 40 , with camshaft 16 having a centrally located axial bore 42 which is in communication with oil passages 44 and 46 of crankcase 10 . also , two spray outlets 48 are disposed within camshaft 16 and have a plane of rotation generally coplanar to the plane defined by the rotation of bearing 30 , transverse to axial bore 42 . in the preferred embodiment , spray outlets 48 are holes having a diameter of approximately 0 . 03 millimeters ( mm ) and are cross drilled in the plane of rotation of the axial mid - point of bearing portion 30 of connecting rod 26 . oil sump region 18 is located near the bottom of crankcase 10 , with pump gear 50 of oil pump 52 disposed within . a suction inlet 54 is disposed near the bottom of oil sump region 18 , and is in communication with oil passage 44 . oil gallery system 22 of crankcase 10 includes oil pump 52 , oil passages 44 and 46 , axial bore 42 , spray outlets 48 , and oil galleries 56 and 58 . oil passageways 44 and 46 are connected to oil galleries 56 and 58 , which are circumferential cavities which surround crankshaft 14 . oil passage 44 directly supplies oil to oil gallery 56 , while oil passage 46 receives oil via oil passage 44 and axial bore 52 and supplies oil to oil gallery 58 . as can be seen in fig4 bearing 30 has a feed opening region 60 which can be in the form of a slot arranged to face camshaft 16 . three different contours for the feed opening 60 are shown in fig1 - 3 . the spray outlets 48 provide lubrication to journal portion 28 by spraying oil into openings on bearing portion 30 . thus , the communication of oil from spray outlets 48 to the feed opening is periodically accomplished . in fig1 bearing portion 30 located in feed channel 61 is not as wide as feed channel 61 and has a wedged portion to divert the sprayed oil about the rounded ends of bearing portion 30 . this configuration causes the oil to flow into tapered side slots 62 of opening 60 , where the oil is contained to lubricate journal portion 28 . a second configuration for feed opening 60 is shown in fig2 with bearing portion 30 &# 39 ; having a chamfered hole 64 located in the middle thereof . in addition , the inner corners of bearing portion 30 &# 39 ; are chamfered to provide side reservoirs 66 . the chamfer of hole 64 provides a wider initial opening for oil , and excess oil within the bearing can accumulate within the side reservoirs 66 . a third configuration for feed opening region 60 of bearing 30 &# 34 ; is depicted in fig3 having milled slot 68 located approximately in the middle of bearing portion 30 &# 34 ;. an advantage of this configuration is that bearing portion 30 &# 34 ; can made from standard molds , with an additional operation of milling slot 68 within bearing portion 30 &# 34 ; being the only additional step or component needed . in operation , suction inlet 54 provides an intake for pump gear 50 to provide pressurized oil within oil passage 44 . the pressurized oil travels both to oil gallery 56 and enters axial bore 42 of camshaft 16 . at approximately the middle of camshaft 16 , some of the oil exits the axial bore through spray outlets 48 . the remainder of the oil continues to flow through camshaft 16 to oil passage 46 , which eventually connects to oil gallery 58 . thus , pump 52 circulates oil within crankcase 10 to lubricate both crankshaft 14 and journal 28 . the operation of the phase timed spray lubrication system is shown in fig4 - 9 . in fig4 bearing portion 30 and camshaft 16 are at their closest proximity . at this point in the rotation of the crankshaft 14 , spray outlet 48a faces feed slot 60 to spray oil onto the surface of journal 28 . because the oil requires time to travel to the feed opening , the alignment of the feed opening 10 and spray outlet 48 is offset to take this spraying lag into account . fig5 shows the arrangement within the crankcase one third of a rotation later . camshaft 16 has rotated so that neither spray outlet 48a nor 48b is directly spraying oil onto feed opening 60 of bearing portion 30 . this remains the case in fig6 where camshaft 16 has further rotated bringing a second spray outlet 48b into closer alignment with feed opening 60 of bearing portion 30 . after the completion of a full rotation , the arrangement of fig7 occurs . in fig7 spray outlet 48b faces feed opening 60 of bearing portion 30 , to spray oil upon journal portion 28 . one third of a rotation after the position of fig7 fig8 shows spray outlets 48a and 48b spraying different parts of crankcase 10 . next at the position shown in fig9 approximately 120 ° rotation past the position of fig8 the first spray outlet 48a begins to align with feed slot 60 although the oil spray does not yet contact feed slot 60 . after another third of a rotation , ( fig9 ) becomes the arrangement shown in fig4 . thus , the preferred embodiment comprises a two - phase lubrication system . the position of the spray outlets 48 should normally lead the oil spray so that when the shafts are closest , the oil sprays into the feed opening . while this invention has been described as having a preferred design , it can be further modified within the teachings of this disclosure . this application is therefore intended to cover any variations , uses , or adaptations of the invention following its general principles . this application is also intended to cover departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and fall within the limits of the appended claims .