US857120A - Gas-engine. - Google Patents

Description

PATENTED JUNE 18, 1907. B. P. STEWART.

GAS ENGINE APPLICATION FILED SEPT. 2,1904.

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(Ztforawy No. 857,120. PATENTED JUNE 18, 1907. B. F. STEWART.

GAS EN GINB.

APPLICATION FILED SEPT. 2,1904.

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we'k'aeaaeau Ii 11. w-2107 No. 857,120. PATENTED JUNE 1 8, 1907. B. F. STEWART. GAS ENGINE.

APPLICATION FILED SEPT. 2, 1904.

3 SHEETS-SHEET 3.

BENJAMIN F. STEWART, or CHICAGO, JLLINOIS.

GAS-ENGINE.

' Specification of LettersPatent.

Patented June 18, 1907.

Application filed September 2, 1904. Serial No. 223,119.

To all whom it may concern:

Be it known that I, BENJAMIN F. STEWART, a citizen of the United States,'and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Gas-Engines, of which the following'is a specification, and which are illustrated in the accompanying drawings,

, forming a part thereof.

-- Thisinvention relates to the two-cycle of gas engine; and its object is to pro 6, for. the compression of the air for each charge liefore introducin thecornbustible. material, the latter being elivered to the assage through which the air entersthe exp odmg chamber.

I A further object is to provide for the regullation of the air supply in a two-cylinderengme.

The mVQHtiOI1- COI1S1StS 1n the structure hereinafter described and which is illustrated in the accompanying drawings, in which- Figure 1 is a longitudinal section of the engine on the plane of the crank shaft;- Fig. 2 is a plan section on the line.22 of Fig. 1; Fig. 3 1s a plan section .on. the line 33 ofEig". 1; .Fig. 4. is a longitudinal central section on aplane transverse to that of Fig; and 5 cylinders are essential duplicatesthe descrip- .tiofl iis ,,for the most part, restrictedto one of and 6 are details of the valve controlling the fuelsu pl. f the major part'oi the invention isapplicable to a single cylinder engineyl have shown, in the drawings, a two-cylinder engine, .or, more properly, a pair of engines com-- prised within a single casting. As the two There are shown in the drawingstwo cylin- I the .cyhnders within which the combustion takes place, and provides for cooling the same.

The crank shaft is shown at '13 .and is common to the two cylinders, as are also the ex-- haust chamber14 and the air-sup l chamber 15, which are shown as locateg'b etween the two cylinders. The piston is shownat' 16, its pitman at 17, and crank at 18.

The crank is located within the compression chamber, the casing of which is shown at 19 and to which air is admitted through the rt, 20, leading through the cylinder wall omthe chamber 15, and ,is uncovered by the piston when the latter is at the limit of its instroke. The airis compressed by the piston during its outstroke, and is delivered from the compression chamber to the explosion chamber through a passage 21, cored in the walls The fuel, usually gasolene, is admitted to I the passage 21 at 25, enterin throu h a' duct 26 in aplug 27, having a nipp e 28 a apted to be connected with the fue tank, The duct 26 opens through the inner end of the plug 27 andjis controlled by a valve 29, the stem, 30, of which passes outwardly through the plug and carries at its outer 'end an expansion s ring 31, which holds the valve to 1ts seat.

he valve is unseatedby the suction due to the instroke of the piston, and to tacilitate this-action the plug 27 is preferably recessed so that air may be admitted through the duct 32 to the back of the valve 29. As the liquid enters through the duct 26 it will trickle down the Walls of the passage 21 andwiil then be taken up by the 8.11 as it rushes through this passage to the explosion chamber.

While a small quantity of air will be admitted by the rising of the valve 29, it will not be sufliclent' to combine with the liquid. to form an explosive mixture, and I am therefore able .to accomplish the compression of the air beforeit becomes charged with the fuel and hence avoid danger of explosions within the compression chamber, as the charge does not become ex losive until it en ters 'thechamber of the cy inder.

The air supply, in an engine organized as described, may be regulated by means of a U-shaped slide valve 33, located within the chamber 15, and being made of elastic material so that it automatically closes the air induction ports 20 for each cylinder. This "valve may be provided with a stem 34', by

means of which it may be adjusted, and its own elasticitywill hold it in any position in which it may be set.

inte -'al' a journal box 35 is provided for the or a shaft 13 intermediate of, the two In casting the shell of the pair of engines cranks, and in order that this box may be the better reinforced and supported I space the two casings 19, 19, of the compression chamber, apart, thereby providing a supporting plate at each end of the box.

. I claim as myinvention- 1. In a gas engine, in combination, a-pair of power cylinders cast integral, a com ression chamber for each cylinder, an air 0 amber between the cylinders,' a port leading from the air chamber to each compression chamber.

2. In a gas engine, in combination, a pair of power cylinders cast integral, a com ression chamber for each cylinder, an air 0 amber and an exhaust chamber between the cylinders, ports opening from the air chamber to each compression chamber, and ports conznecting the exhaust chamber with the exchamber between the cylinders and adjacent the inner ends thereof, ports leading from the air and exhaust chambers through the walls of 'each cylinder and so arranged as to be uncovered alternately ends of their strokes.

4. Ina gas engine,- in combination, a pair by the pistons at the of power cylinders cast integral, a compression chamber for each cylinder, an air chamber between the cylinders, a port leading from the air chamber to each compression cylinder, an expansible U-shapeddouble slide valve fitted within the air chamber and adapted to cover its ports.

5. In a gas engine, in combination, a pair ofjuxtaposed power cylinders, a compression chamber for each cylinder, an air chamber between the cylinders, and a port leading from the airchamber to each of the compression chambers, theports being controlled by the pistons of the cylinders and being opened alternately.

6. In a gas engine, in combination, a pair of cylinders havin a common Wall, a compression chamber or each of the cylinders,

an induction passage formed in the wall between the cylinders, and aport leading from the passage to each of the compression cham ers.

BENJAMIN F. STEWART.

Witnesses:

LoU1s GILLsoN, E. M. KLATOHER.

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