US1090177A - Gasolene-engine. - Google Patents

Description

L. P. VANCE.

GASULENE ENGINE.

APPLICATION FILED SEPT.21,1912.

Patented Mar. 17, 1914.

2 SHEETBSHBET 1.

AIR PHE' AIR INTAKE 49 17 g. 1

MR BUFFER J EXHAUST l/VVE/VTOR LEO F'VANCE TO VALVE CAMSHAFT lV/TNESSES 2 SHEETS-SHEET 2.

L. P. VANCE.

GASOLENE ENGINE.

APPLICATION FILED SEPT.21,1912.

Patented Mar. 17, 1914.

To all whom it may concern LEO 1?. VANCE, OF ROCK ISLAND, ILLINOIS.

GASOLENE-ENGINE.

Specification of Letters Patent.

Patented Mar. 17, 19.1.4.

Application filed September 21, 1912, Serial No. 721,596.

Be it known that I, LEO P. VANCE, a citizen of the-United States, residing at Rock Island, in the county of Rock Island and State of-Illinois, have invented certain new and useful Improvements in Gasolenc-Engines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to internal combustion motors, and has special reference to a two cycle internal combustion motor arranged to operate in connection with an automatic fuel pump.

The principal object of the invention is to improve the efiiciency and economy of the internal combustion motor.

The second object of the invention is to provide means for injecting fuel into the cylinder at the moment ignition takes place for the purpose of doing away witlrthe trouble of premature ignition.

The third object of this invention is to dispense with timing gears and exhaust valves.

With the above and other objects in view this invention consists in general of certain novel constructions, combinations and arrangement of parts'as will be hereinafter fully described, illustrated in the accompanying drawings, and specifically claimed.

In the accompanying drawings, like characters of reference indicate like parts in the several views, and :Figure 1 is a vertical section taken through the engine constructed in accordance with this invention, cer- 'tain of the parts being shown in elevation.

Fig. 2 is a horizontal section through the upper part of the engine. Fig. 3 is an en Ia-rged detail view of the compression pis-. ton and its parts. Fig. 4 is a detail horizontal section partly broken away through the compression piston.

In carrying out the objects of this invention, there is provided a crank casing lO'of the closed type, and in this crank casing is journaled a crank shaft 11 having the usual crank 12 which is connected by means of a piston rod 13 with the pin 14 of a piston-15. This piston is of the usual hollow type and works in a cylinder ltl'surrounded by a wa-. ter jacket 17. ()n the top of the cylinder 16 formed at the lower is positioned an auxiliary cylinder 18 having the usual water jacket 1.), and the bottom of this cylinder 18 is provided with an inwardly extending flange 20. The cylinder 18 carries the head 21 wherein is a stuffing box 22 provided with a packing 23. Thi stuffing box 29. is closed in by a cap 24; secured to the cylinder head by suitable bolts 25. The head 21 is provided with a downwardly extending flange 26 having an interior diameter equal to the interior diameter of the head and stuffing box, and slidably mounted in the head of the stalling box andthe flange is a piston 27 which is formed integrally with a piston 28 by preference, the latter working in the cylinder 18. Both the piston 2S and the piston 27 are hollow as shown clearly in Fig. 3, and through the walls of the piston 27 extend openings 29 which communicate withthc chamber 30 formed in the hollow piston 27 and with a chamber 31 surrounding said hollow piston.

The lower end of the piston 28 is provided with an opcnin forming a barrel seat 32 wherein is seated a valve 33 provided with a stem 34 which extends upward in the upper end of the piston 27 passing through a septum The upper end of this valve stem 34 is surrounded by a coil spring 36, and above the spring is provided a collar 37 secured by a cotter pin 38. The spring 36 bears at one end against the septum 35 and at the other end against the collar 37 so that the valve is normally held closed. Access is had to the collar and spring by means of a plug 39 fitting in the threaded opening of the upper end of the piston 27.

The crank casing is provided with a port 40 from which leads a pa....,agc 41 which has its upper end conru ted tr a port 42 giving access to the chamber 31. A check valve 41 is provided so that air may be drawn into the crank casing. This check valve is of the usual type and comprises a perforated casing forming a rest for one end of the spring yieldably holding the inwardly opening valve stem in a closed position.

On top of the cap 24 is a valve casing -13 which opens into the cap, a seat 44- being end of said opening. A valve 45 is arranged to rest on this seat when the valve is closed, and is provided with a 28 it will force piston stem 416 extending upward through the Valve casing and having on its upper end a collar -17 between which and the casing is a spring 18 so that the valve is normally closed. An air intake opening 19 is made in the valve casing to admit air thereto, and the cap '24: is provided with a port which is connected by a pipe 51 with a port 52 formed on the casing 53 of the mixing. valve, the'latter being provided with the usual needle valve operated by means of the bell crank lever arrangement 55 which is connected by a reach rod 56 to the valve camshaft. The mixing valve casing is likewise provided with a port 57 to which is connected the ipe 58 leading from the supply of gas or The pipe '58 is provided with a check valve to prevent back flow of gas from the valve casing to the gas supply. The cylinder 16 is provided intermediate its ends with the exhaust ports 59, and these ports may or may not be connected to suitable exhaust pipes, as preferred.

In the operation of this device the first instroke draws into the crank-case air only through the check valve (not given on drawing) and compresses air in the cylinder 16 and below pistons 28 and 27 forcing them up, compressing air above piston 27 It is tobe noted since the area of piston 28 is greater than that of piston 27, the pressure above piston 27 is greater than the compressuitable sionor explosive pressure in cylinder 16 and.

below piston 28. Now as piston .15 reaches a point just before dead center fuel admission valve 5% opens and sprays air mixed with the fuel in mixing valve casing 53. Now as no great amount offuel is-in the cylinder 16 at one time, the burning of the fuel will not be in the nature of an explosion; but will last as long as there is fuel in mixing valve casing 58; and valve 54 is open, about one tenth of the forward stroke. The method of burning is'similar to a gas burner, the supply and amount of fuel entering the mixing valve casing 53 may be regulated by choking air intake 19., As piston 15 reaches the position shown in Fig. 1

the explosion takes place then piston 15 will descend on the out stroke and compress the air that is in the crank-casing 10, passage 4C1, 12 and in chamber 31. \Vhen piston 15 reaches a point about 10 before it reaches dead. center the exhaust 59 starts to open. Now as the pressure in cylinder 16 falls below the pressure in crank-casing 10, air passage all and chamber 31 and above piston 28 down till ports 29 in piston 27 fall below flange 26, it will then enter ports 29 and chamber 30. Now at this time the valve 33 opens and this air flows inward assisting in the scavenging of cylinder 16; as pistons 27 and 28 descend it forms a vacuum above piston 27 and in air pipe 51 and in. mixing valve-casing 53 the ike.

drawing in fresh air through valve 45 and a. small quantity of fuel into mixing valve casing 53 ready for the next cycle.'

Having thus described the invention, what I is claimed as new, 1s

1. An engine comprising a casing, a lower cylinder above said casing an upper cylinder above said lower cylinder, the partition between said cylinders being perforated to permit communication between said cylins ders, a hollow cap for said upper cylinder, a piston head slidably mounted in said lower cylinder, a crank shaft passing through said casing, a link connecting said crank shaft with said piston head, a piston head. slidably mounted in said upper cylinder and provided with a hollow core extending into said hollow cap, a valve in said core for normally closing an opening in the bottom thereof, the upper portion of saidcore being provided with perforations for permitting access to the interior thereof, means for permitting communication between said casing and said upper cylinder, and means for'in-i troducing fuel into the upper portion of said lower cylinder. 7

2. An engine comprising a casing, a lower cylinder positioned above said casing and communicating positioned above said lower cylinder and communicating therewith, acollar extending inwardly from the upper wall of said upper cylinder formed therein, a hollow cap closing an opening formed in the wall of said upper cylinder, a piston head slidably mounted in said upper cylinder and provided with an extension adapted to close the opening permitting communication between said upper and lower cylinders when said upper piston is in :1. lowered position,a hollow core in said upper cylinder extending through said collar into said hollow cap, a valvev controlling an opening formed in the bottom of said piston, the walls of said core being pro vided with inlet openings, a pipe permitting communication between said casing and the upper portion of said upper cylinder, a crank shaft passing through said casing, a piston in said lower cylinder, a piston rod connecting said crank shaft with said last mentioned piston, and means for introducing fuel lnto said lower cylinder above said last mentioned piston' i 3. An engine comprising a casing, a lower cylinder above said casing, an upper-cylinder above said lower cylinder, a cover plate for said upper cylinder provided with a central opening, an inwardlyextending collar closing said opening, a hollow cap covering said opening, a hollow piston in said upper cylinder, a core in said piston extending through said collar into said hollow cap, a partition in said core, the lower portion o said core being provided with a plurality o therewith, an upper cylinder and closing an opening openings adjacent said partition and with an opening in its end, a valve for closing the opening in the end of said core, a stem extending from said valve through said partition, a spring surrounding said slein above said partition and engaging H1O same for normally holding said valve in a elosed position, a piston in said lower cylinder, operat ing means for said lower piston, and means for permitting eomn'iunicaeion between said 1' easing and said upper cylinder.

In tesllmumy whereof I. hereunto aflix my. signature in 1n-esenee of two witnesses.

LEO P. VANCE. Wibnesses:

IIENHY JEPIGNS, RUBY bioR'roN.

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