US882812A - Gas-engine. - Google Patents

Description

PATENTED MAR. 24, 1908.

G. O. GARLSON.

GAS ENGINE.

APPLICATION FILED APR. 12, 1901.

I 2 SHEETS-SHEET 1.

FIG. 4

FIG. 1

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WITNESSES.

CHARLES O. OARLS ON, OF PORT RICHMOND, NEW YORK.

GAS-ENGINE.

Specification of Letters Patent.

Patented March 24, 1908.

Application filed April 12, 1907. Serial No. 367,863.

To all whom it may concern:

Be it known that I, CHARLES O. CARLSON, a resident of Port Richmond, Staten Island, in the county of Richmond and State of New York, have invented a new and useful Improvement in Gas-Engines and I do hereby dec are the following to be a full, clear, and exact description thereof.

My invention relates to gas engines, its object being to provide a novel and simple form of mechanism by means of which the air may be forced into the cylinder after the explosion in order to scavenge the same and pre are the cylinder for the next charge.

0 these ends nay-invention comprises the novel features hereinafter set forth and claimed.

In the accompanyin drawings Figure 1 is a vertical sectional e evation of my improved gas engine; Fig. 2 is a like view showmg the piston in compression; F' 3 is a like view showing the piston and va ve mechanism in position where the iston is about to ascend to compress the c arge; Fig. 4 is an enlarged detail view of a portion of the cylinder and valve mechanism; Fig. 5 is detail view'of the cam for operating the exhaust valve; Fig. 6 is a section on the line 66, Fig. 4. 1

In the drawings the numeral 2 designates a suitable cylinder provided with a suitable water jacket 3, said cylinder being illustrated in upright form and sup orted by the section 4 orming the guide or the cross head 5. This section 4 1s bolted or secured to the closed crank case 6. Within the cylinder 2 is the cup-piston 7 to which the piston rod 8 is secured, said piston rod passing down through a suitable stuffing box 9 in the diaphragm 10 which se arates the lower chamber 11 of the cylin er from the cross head casing 4. The cross head 5 is-secured to the piston 8 and a pitman 12 connects said cross head to the crank 13 on the engine shaft 14. At the u per end of the cylinder 2 is the valve 15 w 10h controls the supply of explosive mixture entering the ort 16.

The cylinder 2 is rovided wit1 the exhaust port 17contro led. by the valve 18. This valve 18 has the stem 19 which passes down through the guides 20 and to the lower end' of said rod is secured the yoke 21 which fits over the shaft 22. On said yoke is the friction roller or in 23 in the path of the cam 24 secured to tie shaft 22. This shaft 22 I has on it a bevel gear 25 meshing with the transmitted from the engine shaft to the shaft 22 to operate the cam which raises the exhaust valve 18 as fully hereinafter set forth.

Within the valve casing 33 on the cylinder 2 is the valve 34 controlling the port 35 leading to the upper chamber of the cylinder at a point just above the lowest position of the piston, and the port 36 which communicates with the passa e 37 leading to the chamber 11 of the cylin er below the piston. A main air inlet 38 is connected up to the valve casing 33 and communicates with the annular passage 39 which is adapted to be brought into communication with the ort 36lead1ng gntohthe assage 37 as fully ereinafter set ort the atmosphere. Connected to the valve 34 his air-inlet 38 communicates with is a stem or rod 40, the lower end of said rod having the yoke 41 secured thereto engaging the shaft 22. A friction'roller or in 42 is carried by the yoke 41'and said pin ts within the cam-way 43 of the dam disk 44 secured to the shaft 22.

When my improved as engine is in 0 eration, the charge of exp osive mixture is t drawn through the valve 15 which is lowered by the descent of the piston 7 the exhaust valve being closed and the valve 34 bein in position to close the ports 35 and 36. The explosive mixture being drawn in by the descent of the piston, the piston then ascends to compress the charge which is thereupon ignited in .the ordinary way to create the explosion. The piston in; the meantime, upon 1ts upward stroke to compress the explosive mixture has drawn in the air through the inlet 38, the valve 34 having been moved by the cam 44 so as to bring the annular passa e into register with the port 36, whereby t e air passes into the passage 37, being drawn into the chamber 11 of the cylinder by the suction of the piston as said piston ascends to compress the charge. Upon the descent of the piston after the explosion, the valve 34 is moved to the position indicated in Fig. 2 so as to close the ports 35 and 36. As sald piston descends, the air admitted to the chamber 11 below the piston is gradually compressed and just before said piston opens the forced up through the passage 37, the port 36,

, inder.

the exhaust valve 18, permitting the foul the time said iston 7 has assed the port 35 1 the cam 44 wi l have move the cyhnder 2 at this point under compresport 35 the action of the cam operates to lift gases to escape through said valve and by the valve 34 into the position indicated in 1, whereupon the-air compressed within the chamber 11 is through the valve 34 and passage 35 into the cylinder 2 just above the piston 7 when in its 1 lowest position. This air being admitted to sion acts to drive out the foul gases, the valve 18 remaining open a suflicient length of time i to emit of this. In this manner the air enterlng the cylinder above the iston acts to scavenge the cylinder and c ean it thoroughly so as to pre are it for the admission of another charge 0 the explosive mixture. The operation of the cams 24 and 44 are timed so that just as the piston is about to descend to draw in the new charge of the explosive the valve 18 is closedand the valve 34 is brought to the position indicated in Fig. 2. In this manner, as the piston ascends, the valves 18 and 34 are so operated as to open and close the exhaust and draw the fresh air into the cylinder below the piston and force said air into the space above" the piston so as to thoroughly scavenge the cyl- The valve mechanism may be timed with great accuracy so as to 0 erate at the pro er periods to give the resu ts above descri ed.

What I claim is:

1. In a gas engine, the combination of a cylinder, a piston therein, a piston rod, connections between said rod and the engine shaft, a gas inlet port at the upper end of said cylinder, an exhaust valve, a main air port, an air ort leading to the upper portion of said cy inder at a point just above the lowest position of said piston, a secondair p'ort leadmg to the lower end of said cylinder, a valve controlling said ports and means for operating said valve, whereby air is drawn into the lower end of said cylinder by the ascent of said piston, compressed therein, and admitted to the upper end of said cylinder when said piston in its descent passes the air port leading thereto.

2. In a gas engine, the combination of a cylinder, a piston therein, a iston rod, connections between said rod an engine shaft, a gas inlet port at the upper end of said cylinder, an exhaust valve, a main air port, an air port leading to the upper portion of said cylinder at a point just above the lowest position of said piston, a second air port leading to the lower end of said cylinder, a valve controlling said ports, cam mechanism for operating said valve, connections between said cam mechanism and the engine shaft, whereby air is drawn into the lower end of said cylinder by the ascent of said piston, compressed therein and admitted to the upper end of said cylinder when said piston in its descent passes the air port leading thereto.

3. In a gas engine, the combination of a cylinder, a piston therein, a piston rod, connections between said rod and the engine shaft, a gas inlet port at the upper end of said cylinder, an exhaust valve, a main air port communicating directly with the atmosphere, an air ort leading to the upper portion of said cy inder at a point just above the lowest position of said piston, a second air port leading to the lower end of said cylinder, a valve controlling said port and means for operating said valve whereby air is drawn into the lower end of said cylinder by the ascent of said piston, compressed therein, and admitted to the upper end of said cylinder when said piston in 1ts descent passes the air port leading thereto.

In testimony whereof, I the said CHARLES O. CARLsoN have hereunto set my hand.

CHARLES O. CARLSON.

Witnesses:

RUDOLPH STRANDBERG, CLARENCE D. HART.

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