Van Nostrand's engineering magazine . L, M,N, etc. From L, M, N, etc., draw linesparallel to AB to meet their correspond-ing ordinates in P, Q, R, &c. Then thecurve P, Q, R, etc., drawn through thesepoints, would be a curve, the ordinates 448 van nostrands engineering magazine. of which were proportional to the press-ure at any time of the contents of thecylinder, supposing these contents to re-main confined in the space at the endof the cylinder, and not allowed to ex-pand, and supposing the rate of com-bustion of these contents to be exactlythe same as actually occurred. Thiscurve, therefore
Van Nostrand's engineering magazine . L, M,N, etc. From L, M, N, etc., draw linesparallel to AB to meet their correspond-ing ordinates in P, Q, R, &c. Then thecurve P, Q, R, etc., drawn through thesepoints, would be a curve, the ordinates 448 van nostrands engineering magazine. of which were proportional to the press-ure at any time of the contents of thecylinder, supposing these contents to re-main confined in the space at the endof the cylinder, and not allowed to ex-pand, and supposing the rate of com-bustion of these contents to be exactlythe same as actually occurred. Thiscurve, therefore, showed the actual prog-ress of the combustion deduced from the stroke. Hence the maximum pointon the diagram was simply the pointwhere the increase of pressure due tocombustion was balanced by the decreaseof pressure due to the forward motionof the piston, and there was no reasonfor saying that this maximum point cor-responded to complete ignition. He hadhad an opportunity of taking diagramsfrom the Otto gas engine, which Pro-. the working diagram. Even neglectingthe loss of heat through the walls of thecylinder, it would be seen that this curveascended to a point past the point ofmaximum pressure, viz., till the pointK, at the commencement of the part KV(which was supj^osed to be exactly adi-abatic) was reached. From the point Sthis curve became in the actual diagrama straight line parallel to AB. If, how-ever, the theoretical diagram, allowingfor loss by conduction, were taken, thecurve PQRS would ascend throughout fessor Ayrton had at the City GuildsTechnical School, Cowper Street. Theengine was designed for the electriclight, and the cam, controlled by thegovernor, was made in a series of therefore had the governor takenoff, and the cam and the roller onwhich it acted so arranged that it shouldwork independently of the velocity ofthe engine on a given step, so that thecharge might be, as nearly as possible,the same at all speeds. And he variedthe load by braking
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
