. The Street railway journal . hat the crank ends of the pumps discharge into the crank endof the power cylinder, and the head ends of the pumps into thehead end of the power cylinder. By reference to Fig. 1 it will be seen that the piston is at theouter dead point, and the exhaust ports exposed toward the head Double-Acting; Two-Cycle Gas Engine The accompanying cuts illustrate the principal features of a newdouble-acting two-cycle gas engine, designed by Ernst Koerting,and manufactured by the De La Vergne Refrigerating MachineCompany, of New York. It will be noticed that the crank endand the
. The Street railway journal . hat the crank ends of the pumps discharge into the crank endof the power cylinder, and the head ends of the pumps into thehead end of the power cylinder. By reference to Fig. 1 it will be seen that the piston is at theouter dead point, and the exhaust ports exposed toward the head Double-Acting; Two-Cycle Gas Engine The accompanying cuts illustrate the principal features of a newdouble-acting two-cycle gas engine, designed by Ernst Koerting,and manufactured by the De La Vergne Refrigerating MachineCompany, of New York. It will be noticed that the crank endand the head end of the power cylinder are similar to the cor-responding parts of a double-acting steam engine, and that theadmission valves are located in the valve boxes, which are boltedto the cylinder heads. Exhaust valves are not required, as theproducts of combustion escape through slots or ports in themiddle of the cylinder leading to the exhaust pipe. These slotsare covered by the motor piston itself, which is made very long,. FIG. 2.—SECTIONAL VIEW end of the engine. In operation, as soon ; s the piston begins touncover the exhaust ports the pressure of the residual productsof combustion in the cylinder drops rapidly to that of the atmos-phere, enabling the inlet valve to be opened and admitting a freshcharge from the pumps. Air only is supplied at first to separatethe burnt gases from the succeeding mixture, and afterwards gasand air are admitted in proper proportions. As soon as the ex-
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
