Diesel engines for land and marine work . high-speed two-cycleengines. German Types.—A large number of two-cj^cle singleacting engines of the Diesel type have been constructed byMessrs. Krupp of Kiel, of which several were for the Germanand Italian Navies, but recently four engines each of 1, running at revolutions per minute have beenbuilt for the Deutsch-Amerikanische Petroleumgesellschaftfor tank vessels. All engines of over 300 are made onthe two-cj^cle principle, Mhile those below this power are fourcycle, in each case being directly reversible except for thevery smalle
Diesel engines for land and marine work . high-speed two-cycleengines. German Types.—A large number of two-cj^cle singleacting engines of the Diesel type have been constructed byMessrs. Krupp of Kiel, of which several were for the Germanand Italian Navies, but recently four engines each of 1, running at revolutions per minute have beenbuilt for the Deutsch-Amerikanische Petroleumgesellschaftfor tank vessels. All engines of over 300 are made onthe two-cj^cle principle, Mhile those below this power are fourcycle, in each case being directly reversible except for thevery smallest sizes. Fig. 123 shows a high speed two-cyclereversible marine engine of Messrs. Krupps construction,of 1,000 , recently supplied to the German Admir-alty, and this is typical of the general design of the two-cycle engine. There are six working cylinders dividedinto two sections of three each, with the air compressor inthe centre and a scavenging air pump at each end, thepeculiar construction of the suction chambers being well. I I I I I I I I I r---L, 246 DIESEL ENGINES FOR LAND AND MARINE WORK seen in the illustration. Each scavenging pump suppliesthree of the cylinders, which thus form a completely inde-pendent set, so that for low powers only one-half of workingcylinders need be in operation and a greater reductionin power may thus be obtained, with corresponding increasein manoeuvring facilities. For the engine exhaust, portsat the bottom of the cyhnder are employed as usual withtwo-cycle motors, and the scavenge air is admitted throughvalves in the cylinder head. The crank chambers aretotally enclosed, with inspection doors in front of eachcylinder for examining the cranks and bearings. The method of reversing in this engine consists in the employment of aheadr 1 r - and reverse cams on the same cam shaft,which is moved axiallyduring reversing so asto bring the ahead orastern cams under-neath the valve operating the valvesas required. Thevalves which r
Size: 1116px × 2239px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkdvannostran
