. Automotive industries . the vicinity ofPittsburgh and thecar was drivenwide open when-ever conditionspermitted. All bearings areof generous pro-portions and it issaid that their lifeis more thandoubled by the useof the dry sump,in conjunction with high-pressurelubrication deliv-ering a very largevolume of cool oil,properly filtered,to all workingparts. The latterare completely en-closed, in fact theonly exposed mov-ing part is the fan,which is carried on the forward end of the overheadcamshaft. The oil pump is formed by meshing the gear on the lowerend of the vertical shaft, which drives the
. Automotive industries . the vicinity ofPittsburgh and thecar was drivenwide open when-ever conditionspermitted. All bearings areof generous pro-portions and it issaid that their lifeis more thandoubled by the useof the dry sump,in conjunction with high-pressurelubrication deliv-ering a very largevolume of cool oil,properly filtered,to all workingparts. The latterare completely en-closed, in fact theonly exposed mov-ing part is the fan,which is carried on the forward end of the overheadcamshaft. The oil pump is formed by meshing the gear on the lowerend of the vertical shaft, which drives the overhead cam-shaft with the top gear of the short stub shaft driven bythe crankshaft. This construction cushions the cam-shaft drive and helps to silence the valve mechanism. The ~^^v ^JJ &u *>£«_ ^ Jp !&/ f —hs-4222t« PS Performance cm re of Spring engine. Intake ide oj Spring • ngint I on ing < lean i i ternal appearam i Top engine with valve cover removed 494 AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE March 3, 1921 stub and vertical shafts are hollow. Oil is lead, throughthe vertical shaft, to the hollow camshaft and to the tubesupon which the rocker arms are located, oiling all bear-ings, and returning to the sump through passages cast inthe cylinders and crankcase. Oil is led from the stub shaftthrough suitable passages to all of the main bearings, andthence through holes drilled in the crankshaft to the con-necting rod bearings. The cylinder walls and piston pins are lubricated by theoil thrown off from the connecting rods. A scavenging-pump is located externally on the front end of the oil pump returns the oil from the sump to the oil tank,which is separate from the engine, as fast as it accumu- lates. Baffle plates are cast integrally with the upper caseto prevent excessive lubrication of the cylinder walls. Itis claimed t
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
