. Test of a Delavergne oil engine . type Sengine. The DeLaVergne type S oil engine is ofthe two port, two cycle type with boro andstroke of 7 and 7 l/2 inches engine draws in a charge of pure airthru a check valve in the crank case on theupvfard stroke of the piston, and compress-es it on the downv/ard stroke to a pressureof about 6 pounds per sq. in. When thepiston nears the bottom center it uncoversa port in the side of the cylinder whichallows the products of combustion of theproceeding explosion to escape. The chargeof air is transferred from the crank caseto the cylinder
. Test of a Delavergne oil engine . type Sengine. The DeLaVergne type S oil engine is ofthe two port, two cycle type with boro andstroke of 7 and 7 l/2 inches engine draws in a charge of pure airthru a check valve in the crank case on theupvfard stroke of the piston, and compress-es it on the downv/ard stroke to a pressureof about 6 pounds per sq. in. When thepiston nears the bottom center it uncoversa port in the side of the cylinder whichallows the products of combustion of theproceeding explosion to escape. The chargeof air is transferred from the crank caseto the cylinder by means of another port inthe side of the cylinder which is uncovordby the piston slightly after the exBaustport. This charge of air is then compress-ed by the upward stroke of the piston intothe clearance space and the ignition bulb,which is kept at a low red heat by thesuccessive explosions. The power stroke ofthe engine is effected by injecting a quant-ity of oil in a finely divided condition m^y-. Sfro/Cc^ In c/o^c^ 7. 16
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