Practical hand book of gas, oil and steam engines, stationary, marine, traction; gas burners, oil burners, etc.; farm, traction, automobile, locomotive; a simple, practical and comprehensive book on the construction, operation and repair of all kinds of engines (1916)
Rathbun, John B. [from old catalog] · Chicago, Charles C. Thompson co · leaf 71
he two port motor, as previously described, the checkvalve V opens to admit the charge, and closes during its com-pression in order to prevent its escape through the openingby which it was admitted to the cylinder. With the three porttype there is no check valve in the crank case, the admissionand… … Figs. 6-7. Diagram of Three Port—Two Stroke Cycle Engine in TwoPositions. By the piston control of the gases in the crank case, the valveis eliminated, which makes one less moving part to cause trou-ble and expense, and permits the use of the same type of car-buretor that is used on the four stroke…
Internal combustion engines · Traction-engines
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