Diesel engines for land and marine work . CONSTRUCTION OF DIESEL MARINE ENGINE 209 mixture is e x-hausted throughlongitudinal portsat the bottom ofthe cyhnder ar-ranged round thewhole of the cir-cumference, into acommon exhaustpipe running thelength of the en-gine and thenceto the two stage aircompressor is pro-vided arranged asshown for thesupply of injec-tion air and forfilling the com-pressed air ve selswith air requiredfor starting andmanoeuvring, al-though thismethod is notalways adopted,the pumps beingplaced in front ofand behind thescavenge cylinderin some engines,being then
Diesel engines for land and marine work . CONSTRUCTION OF DIESEL MARINE ENGINE 209 mixture is e x-hausted throughlongitudinal portsat the bottom ofthe cyhnder ar-ranged round thewhole of the cir-cumference, into acommon exhaustpipe running thelength of the en-gine and thenceto the two stage aircompressor is pro-vided arranged asshown for thesupply of injec-tion air and forfilling the com-pressed air ve selswith air requiredfor starting andmanoeuvring, al-though thismethod is notalways adopted,the pumps beingplaced in front ofand behind thescavenge cylinderin some engines,being then drivenby links off thescavenge p u m ppiston rod. Thepumps are \\atercooled, inter-. 210 DIESEL ENGINES FOR LAND AND MARINE WORK mediate cooling between the stages being also arrangedfor. A long trunk piston is employed, serving at the same timeas a crosshead, and in the larger engines this piston is wateror oil cooled. Forced lubrication is adopted for all the mainbearings, the oil pumps being driven off the crank shaft atthe end of the engine, and also the cooling water pump, whilea thrust block is arranged on the engine itself, though forlarge powers it may be fixed separately on the propeller shaftas near the engine as convenient. The operation of starting and reversing the engine iscarried out by means of compressed air. The cam shaftis first put into the position in which the cams are set tooperate the valve levers for ahead or astern, by turning avertical spindle which drives this cam shaft, this operationbeing performed by turning the hand wheel controllingthe engine. By a further rotation of the hand wheel thespindle, on which are pivoted the levers working t
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkdvannostran
