US1400122A - Internal-combustion engine - Google Patents

Description

N. WINBLAD. INTERNAL COMBUSTION ENGINE. APPLICATION FILED NOV. I4, 191?. 1,400,122. Patented Dec. 13, 1921.

/lll/lllll UNITED STATES PATENT OFFICE.

NIKLAS WINBLAD, 0F STEPNEY, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 THE LOCOMOBILE COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORORATION 0F WEST VIRGINIA.

INTERNAL-COYIBUSTION ENGINE.

Specicaton of Letters Patent.

Patented Dec. 13, 1921.

Application filed November 14, 1917. Serial No. 202,034.

T 0 all whom 'it may concern Be it known that I, NIKLAs VINBLAD, a citizen of the United States, and a resident of Stepney, in the county of Fairiield and State of Connecticut, have invented an Improvement in Internal-Combustion Engines, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to internal combustion engines, and is more particularly, though not exclusively, concerned with a valve mechanism especially adapted for use with high speed, high compression-engines of the modern type, in which' the valves are placed alongside and close'to the cylinders, to enable the combustion chambers to be decreased in size, without unduly reducing Ytheir depth. 1

of, while its scope will be more particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a vertical, cross-sectional view ofan internal combustion engine embody-l ing my invention; Y

Fig. 2 is a detail plan of one pair of valve lifter guides, andthe yoke and stud which holds them in place; and

Fig. 3 is a detail sectional view on line 33 of Fig. 1, but with the valve lifters omitted.

Referring to the drawings, and to the embodiment of my invention which is illustrated therein, I have shown for purposes of exemplification an internal combustion engine of the T-head type, having a cylinder 4 provided with a combustion chamber 5, having laterally offset valve chambers 6-6, although it should be distinctly understood that my invention is by no means limited to engines of the T-head type, but may be used in connection with engines of the -L-head type and possibly others. The general features of the engine are, or may be, of common form, and herein include a piston 7 working in the cylinder 5, and connected by a connecting rod 8 to a crankpin 9 of a crank-shaft 10, the latter being mounted in suitable bearings 11 in a crankcase 12. Also mounted in suitable bearings inthe crank case are two cam-shafts 18, provided with cams 14 to operate valve lifters 15 in a usual and well-known manner, thereby to actuate valves 16 cooperating with valve seats 17 in the oiiset chambers 6. These valves act to control the admission of combustible mixture to and the exhaust of the spent gases from the cylinder in a manner too well known to require further description.

It should be observed that the axis of the cam shaft is located at a greaterA distance from the axis of the cylinder than the distance from the center of the valve seat to said axis. This enablesy the combustion chamber to be of the least possible width for a given diameter of valve, while still providing ample space for the valve-actuating mechanism at one side of the cylinder. This is herein accomplished by arranging the valve and valve lifterso that their common axis AA is at an angle to the axis BB of the cylinder. Heretofore, this arrangement has introduced difficulties in' the guiding of the valve lifters, but by the arrangement which I shall now describe, all of the advantages ofthe inclined arrangement of the valves are preserved, and the diiiiculties referred to are obviated. To these ends, I have herein provided. valve-lifter guides 1S, each of which has a cylindrical bore 19 to receive and guide the valve-lifter, the axis of this bore being, of course, at an angle to the axis of the cylinder.

To avoid serious difficulties in machining the crank-case, where it forms a support for the valve-lifter guide, the outside of the latter is arranged parallel with the axis of the cylinder. In the present example, the crank-case is provided with a cylindrical bore 20, to receive and form a socket for a corresponding cylindrical portion 21 of the valve lifter guide, while the latter is provided with a supporting flange 22 at right angles to the axis of the cylinder. This fiange rests upon a supporting surface 23, also at right angles to the axis of the cylinder.

Thus it is evident that, while the valve 'A not be in and valve-lifer are inclined at an angle to the axis of the cylinder, and the internal guiding surface of the valve-lifter guide is correspondingly inclined, its exterior is shaped to provide a socket parallel with the cylinder and a seat at right angles therewith, thus greatly simplifying the operation of machining the crank-case casting, a matter which has heretofore been attended with great diiculty in engines of the inclined valve type.

Since the bore 19 of the valve lifterguide is at an angle to the bore 2O in the crank case, it is important that the guide be held against turning movement; otherwise the valve lifter guide would be apt to turn around in its seat, and the valve lifter would proper position for coperation with the valve. As a means to prevent any such turning movement, I have herein provided a stud 24 interlocking with the fianges of one pair of guides, as best shown lin Figs. 2 and 3. A nut 25 threaded onto the stud engages a usual yoke 26, the latter having pairs of arms 27 resting on the flanges 22, and serving to clamp the latter against the supporting surface 23. By this means, the valve-actuator guides are firmly held in their sockets, and prevented from turning. The

valve lifters and guides may be readily re` moved at any time by simply unscrewing the 'nuts 25 and lifting the yokes 26, after which the guides may be withdrawn in an upward direction, and when these parts are replaced, the flanges 22 are once more interlocked with the stud 24, so that the bores 19 are accurately positioned in alinement withk the valves.

While I have herein shown and described one specific form or embodiment of my invention for illustrative purposes, and have disclosed and discussed in detail the construction and arrangement incidental to one specific application thereof, it is to be understood that the invention is limited neither to the mere details or relative arrangement l of parts, nor to its specific embodiment herein shown, but that extensive deviations from Y a cylinder having vins the illustrated form or embodiment of the invention may be made, without departing from the principles thereof.

Having thus described my invention, what I claim and desire by Letters Patent to secure 1s:

l. An engine comprising, in combination, a laterally offset valve chamber and a pair of valve seats, a piston working in said cylinder, a pair of valves coperating with said seats, valve actuating mechanism including a shaft whose axis is located at a greater distance fromrthe axis of said cylinder than the distance from the centers of said valve seats to said axis, a

pair of valve-actuators separated by said 2. An engine comprising, in combination, Y

a cylinder having a laterally oHset valve chamberand a pair of valvelseats, a piston working insaid cylinder, a pair of valves coperating with said seats, valve-actuating mechanism including a shaft whose axis is located at a greater distance from the axis of said cylinder than the distance from the centers of said Vvalve seats to said axis, a pair of valve-actuators operated by said shaft, a pair of valve-actuator guides having outer circumferential surfaces ,arranged parallel with lthe axis ofv said cylinder and having inner valve-actuator guiding surfaces arranged at an angle to the axis of said cylinder, a support provided with openings whose internal surfaces form sockets for said outer circumferential surfaces of said guides, and means to predeterminethe position of said guides and to insure alinement of their guiding surfaces with `said valves.

3. An engine comprising, in combination, a cylinder having a piston working therein, a valve having itsl axis disposed lengthwise of and at an angle to the axis of said cylinder, a valve-actuator axially alined with said valve, a valve-actuator guide having one axis alined with said valve and valve-actuator and having another axis parallel with the der, a valve-actuator axially alinedy withV said valve, a valve-actuator guide having one axis alined with saidvalve and valveeactuator and having another axis parallel with the axis of said cylinder, a guide mounting provided with a guide-receiving. opening having an axis parallel with the axis of said cylinder, and means interlocking with said mounting' andl said guide to prevent said guide from turning about its second-mentioned axis.

5. An engine comprising, in combination,

a cylinder having a piston working therein, a valve having its axis disposed lengthwise of and at an angle to the axis of said cylinder, a valve-lifter axially alined with said valve, means for moving said valvelifter axially to cause the same to move said valve axially, a valve-lifter guide provided with a valve-lifter guiding bore having its axis a-lined With said valve, said guide being provided with an outer surface Whose axis is parallel with the axis of said Cylinder, a guide-mounting provided with a guide-receiving opening parallel With the axis of said Cylinder, valve lifter guide positioning means, and valve lifter guide clamping means.

In testimony whereof, I have signed my name to this specification.

NIKLAS WINBLAD.

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