US1162054A - Gas-engine. - Google Patents

Description

E HANSEN.

GAS ENGINE APPLICATION FILED FEB. II. 1915.

Patented Nov. 30, 1915.

3 SHEETS-SHEET W/ T/VEE/EEE AZ/Lm E. HANSEN.

GAS ENGINE.

APPLICATION FILED FEB. 17, 1915.

mmm, Patented NOV. 30, 1915.

3 SHEETS-SHEET 2.

GAS ENGINE. APPLICATION FILE-D FEB. 17, I915- 1,162,054.

30, 1915. 3 SHEETS-SHEET 3.

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\ f VE TOP? WITNESSES.

- A T TQHNE Y5 EIMER HANSEN, 0F RACINE, WISCONSIN.

GAS-ENGINE.

Specification of Letters Patent.

Patented Nov. 30, 1915.

Application filed February 17, 1915. Serial No. 8,712.

To all whom itmay cohcem:

Be it known that'I, ELMER HANSEN, -a citizen of theUnited States, and resident of Racine, in the county of Racine and State of- Wisconsin, have invented new and useful Improvements in Gas-Engines, of which the following is a description, reference being had to the accompanying drawings, which are apart of this specification.

' This invention relates to internal combustion engines.

The invention designs more particularly to provide an internal combustion engine with a new and improved form of sleevevalve. r

Theinvention further designs to provide a sliding sleeve and a supplemental piston to operatethe'valves of the engine which supplemental piston also furnishes power to the engine.

The invention further designs to provide a sleeve-valve concentric with the cylinder of the engine and surrounding the engine piston and a supplemental piston alsosurrounded by the sleeve and cooperating therewith to actuate the valve.

The invention further designs to-provlde an engine having main and supplemental: pistons to increase the stroke of the engine said supplemental pistons cooperating with the valve-sleeve to open and close the exhaust and inlet ports.

' The invention further designs to provide a sleeve-valveconcentric with the cylinder of the engine and surrounding the engine piston a supplemental piston disposed above the main piston and working withln' the sleeve, a crank shaft for the engine piston and a valve shaft-for the supplemental piston and valve-sleeve parallel to the engine crank shaft, so that an engine of substantially perfect balance is produced.

The invention further designs to provide a new and improved form of internal combustion engine.

The invention consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof. 4

In the drawings: Figure' 1 is a vertical sectional view of the engine embodying the invention; Fig. 2 is a section taken on the line 22 of Fig. 1 showing the position of the parts at the end of the compression stroke ;-'F ig.- 3 is a section taken on the line 33 of Fig. 1; Fig. 4 is a section taken on the line 4-4.- of Fig. 1.

The drawings show the invention applied to an engine of the four cycle type but it will be understood that it may be used on other types of engines. The cylinder casing A'of the engine i provided with cylinders B, C, D and E, the walls of which are water-cooled. Eightinl'et ports F and a similar number of exhaust ports G are provided in each cylinderand are situated preferably toward the upper end of the cylinder. Water jackets H and- I are interposed between the inlet and exhaust ports respectively to cool the gases passing through the ports. A water cooled partition J is interposed between the exhaust and inlet ports in each cylinder.

Each cylinder is provided with a sleeve 5 concentrically mounted to .slide therein and extending the length of and somewhat below and above the cylinder. -The sleeve 5 is provided with apertures 6 which are positioned to register with either the eX- haust or inlet ports under proper conditions. Each of the upper ends of the sleeves :5 have flanges 7 and means hereinafter described are provided for operating said sleeves.

' concentrically mounted to slide in the sleeves are the main engine pistons 8 having the usual rings 9 mounted thereon and a concave head 8. -Pitmen 10 pivotally connect the pistons ,8 with a crank shaft 11 which has its ends journaled in a crank case 12 upon which the cylinder casing is mounted. The crank shaft 11 carries a fly wheel 13 and a sprocket wheel 14.

Concentricallymounted to slide in the sleeves at theupper end thereof and in a shaft.

form a driving connection between the supplemental pistons and the engine crank The means for operating the sleeves '5 comprises a plurality of pairs of eccentrics 22- mounted on the valve shaft 19, a plurality of pairs of eccentric'straps 23 mounted on said eccentrics and whose ends 24 are pivotally secured to said sleeves by pins 25 mounted in the flanges '7 of the sleeves. A brace bar 26 is secured to the cylinder casing A and forms at its ends supporting bearings for the intermediate portion of the valve shaft 19 and crank shaft 11. A cover 27 rests upon the upper end of the cylinder casing and incloses the operating parts of the valve gear mechanism.

From the foregoing it will be noted that the valve sleeves are concentrically arranged to slide in the cylinders, the main and supplemental pistons are concentrically arranged to slide in the sleeves and the shaftfor operating the sleeves and the supplemental pistons are disposed directly above said parts and in the same vertical axis as the crank shaft of the engine and parallell-y disposed with respect thereto thus producing an engine of fine balance of parts.

The operation of the engine may be best described with reference to Fig. 1. The en gine is timed to fire in the following order cylinders B, D, E,C. In Fig. 1 in cylinder B firing has taken place and the exhaust is just about to start, the piston 8 has moved down in the sleeve to its lowest position; the supplemental piston has moved up the sleeve but not sufficiently to open the exhaust G and the sleeve 5 has moved upwardly so that its apertures 6 are in registerwith the exhaust ports. At this time cylinder D has just furnished its exhaust stroke and is starting. suction, the piston 8 has commenced to move down in the sleeve, the sleeve has moved down in the cylinder closing off the exhaust ports and the piston 15 is also moving down. At this time also the cylindervE has'just finished its suction stroke and is about to start compression, the piston 8 has moved down to its lowest position and the piston 15 is moving-down and thesleeve 5 moving up to close the intake ports. At the same time the cylinder C has just finished compression and explosion is about to take place,-the pistons 8 and 15 are close together their heads 8 and 17 with a small exposed portion of the interior of the sleeve forming the explosion chamber and the sleeve 5 has moved up to close off the intake ports. Thus the sleeves and the supplemental pistons cooperate to open and close the exhaust ports and the supplemental pistons also being acted upon by the charge transmit power from the valve shaft 19 to the main crank -.-shaft 11 which thus increases the stroke of the engine and produces more power and also a better compression due to the pistons 8 and 15 working against each other on the compression stroke. Furthermore the movement of the supplemental pistons 15 are so timed with relation to the movement of the main pistons 8 that the pistons 15 have moved down to-their lowest position before explosion and are moving up with the pistons 8 immediately before explosion takes place thus insuring movement of the two pistons upon the sleeve during firing to prevent any carbon forming on the sleeve and the pistons come so close together at the time of explosion that there is little chance of the lubricating oil within the sleeve burning and there is consequently the moving parts.

A further advantage of the present construction is that the single sleeve is provided with but one set of apertures so that when either the exhaust or inlet are exposed the other will not be and consequently the inlet will not be hindered by the action of the ex haust.

The crank shaft and the valve shaft are geared two to one so that the valve shaft revolves once to two revolutions of the crank shaft so that the pistons come together only during the firing stroke. A

The invention thus exemplifies a new and improved internal combustion engine in which the valve mechanism consists of. a

sleeve valve and a supplemental piston which also coiiperates with the main piston to increase the stroke and power of the engine. 1

#What I claim as my invention is:

1. In an internal combustion engine, the combination of a cylinder having inlet and exhaust ports, a sleeve-valve concentrically mounted to slide within said cylinder, an engine piston concentrically mounted to contact with and slide within said sleevevalve, and a supplemental piston concentrically mounted to contact with and slide within said sleeve-valye and coacting with said sleeve valve-to open and close said ports.

2. In an internal combustion engine, the combination of a cylinder having inlet and exhaust ports, a sleeve concentrically mounted to slide within said cylinder and having a plurality of apertures positioned in the same plane and adapted to register with either said inlet or exhaust ports, an engine piston concentrically mounted to contact with and slide Within said sleeve, and a supplemental piston concentrically mounted to contact with and slide within said sleeve and coacting with said sleeve to open and close said ports.

3. In an internal combustion engine, the

centrically mounted to slide within said cylinder, an engine piston concentrically good lubrication of mounted to contact with and slide within said sleeve-valve, and a supplemental piston concentrically mounted to contact with and slide within said sleeve-valve and 'coacting with said sleeve valve to open and close said ports, said supplemental piston, sleevevalve and engine piston cooperating to form an explosion chamber.

4. In an internal combustion engine, the combination, with a cylinder having inlet and exhaust ports, a crank shaft and a valve shaft, of a sleevevalve slidably mounted in said cylinder, an engine piston slidably mounted in said sleeve-valve and directly contacting therewith and operatively connected to said crank shaft, a supplemental piston slidably mounted in said sleeve and directly contacting therewith and operatively connected to said valve shaft and cooperating with said sleeve-valve to open and close said ports, means for operatively connecting said sleeve-valve with said valve shaft, and a driving connection between said crank shaft and valve shaft.

5. In an internal combustion engine, the

in said cylinder, means foroperatively con-.-

necting diametrically opposite portions of said valve to said valve shaft, an engine piston slidably and concentrically mounted within saidsleeve and directly contacting therewith, a supplemental piston. slidably and concentrically mounted within said sleeve and directly contacting therewith, a driving connection between'said crank shaft and engine piston, and a driving connection between said valve shaft and supplemental piston, said crank shaft and valve shaft being disposed substantially parallel to each other and in the same vertical plane.

In testimony whereof, I-aiiix my signature, in presence of two witnesses.

ELMER HANSEN.

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