US1338721A - Internal-combustion engine - Google Patents

Description

A: Yl EDWARDS.

INTERNAL COMBUSTION ENGINE.

.APPLICATION FILED FEB. 7, i918.

A. Y. EDWARDS.

INTERNAL COMBUSTION ENGINE.

APPLICATION msu FEB. 1918.

1,388,721. Patented May 4,1920.

3 SHEETSQSHEET 2.

@vdmab I A. Y. EDWARDS.

H ERNAL COMBUSTION ENGiNE. PPLlcATloN FILED FB.7,191i8.

Patented May 4, 1920.

3 SHEETS-SHEET 3- I ttoznm UNITED sTATEs PATENT oEEIoE.

ALBERT Y. EDWARDS, OF SPRINGFIELD, OHIO.

INTERNAL-COMBUSTION ENGINE.

To all whom t mayv concern Be it knovvn that I, ALBERT Y. EDWARDS, a citizen of the United States, residin at Springfield, in the county of Clark and tate of Ohio, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

This invention relates to improvements in internal combustion engines, and it more particularly relates to engines of theV stationary horizontal type.

An object of my invention is to construct an engine of the character referred to in which all Working parts Will be inclosed but at the same time readily accessible by the removal of an unencumbered cover from the crank casing.

A further object of my invention is to reduce the cost of machining to the minimum by providing a construction in Which it is necessary to go through the operation of but a single planing and setting of the engine casting to provide a finished surface for the reception of the crank case cover, the caps for the crank shaft bearings, and the brackets which support such parts as the magneto, the governor and the cam gears.

A further object of the invention is to enable the employment of an unencumbered crank case cover by providing improved valve operating mechanism Wherebythe introduction into the crank case or the cover of such parts as transverse shafts or other mechanism which Would be liable to interfere vvit'h the aforesaid object, is obviated.

`A further object of the invention is to provide an engine of the character referred to Which Will be compactly arranged, simple in construction, economical in manufacture and effective in operation.

Referring to the accompanying drawings Figure 1 is a side elevation With a portion of the crankl case and cam gear housing partly broken away and also the'cylinder head extension containing the gas passages and some of the valve operating mechanism partly broken avvay and shown in section, the section being on the line 1*-1 of Fig. 2.

Fig. 2 is an end vievv vvith the cover plate of the cylinder head extension removed.

Fig. 3 s a top plan view ofthe crank case Specification of Letters Patent.

AppIication filed February 7, 1918.

Patented May 4, 1920.

Serial No. 215,792.

and cam gear housing with the cover and operating parts removed.

Fig. 4 is a similar View showing the operating parts in position therein.

Fig. 5 is a side elevation of a portion of the valve operating mechanism.

Fig. 6 is a section on the line 6-6 of Fig. 5.

Referring to the drawings, 1 represents the base, 2 the crank case proper, 3 and 4 tivo horizontally arranged cylinders, 5, a Water reservoir communicating with the Water jacket, 6, 7 a gear housing, and 8 a housing for one of the crank shaft bearings, these parts being all preferably integrally cast together, with the crank case centrally arranged and the housings 7 and 8 arranged at each side thereof and forming respectively central and side sub-bases.

The crank case 2 is provided with a removable cover 9, the crank case proper, as Well as the gear housing 7 being provided with a finished surface 2a to receive the cover, as vvell as additional surfaces 2b and 2c for a purpose hereinafter explained, all of these surfaces being machined with but a single setting of the engine casting, and with but a single operation of the milling machine or grinder. For the purpose of securing the cover in position, the crank case casting is provided With openings 10 to receive the bolts 11. The crank case has bearings 12 for the crank shaft 13, the fly- Wheel 13a being centrally located in the casing. The bearings have their centers in the plane of the finished surfaces 2 and 2C, Which surfaces receive the bearing caps 14, the Walls of the casing being Aprovided With openings 15 to receive the bolts 16 which hold the caps in position. y

These planed surfaces are also utilized for the purpose of receiving brackets which support certain of the operating parts such as the magneto, the governor, and the cam gears and cams. The magneto bracket 17, supporting the magneto 18, is secured to the surface 2fL at the point provided With the openings 19, which receive the bolts 20. The bracket 21 which supports the cams and gears is secured to that portion of the planed surface 2b which is provided With the openings 22 Which receive the bolts 23. The bracket v24 which supports a portion of the governing mechanism is secured to that portion of the planed surface 2a which is provided with the opening 25 which receives the bolt 26.

From the construction described it will be seen that it is necessary to machine but one surface to receive the crank case cover, the bearing caps, and the various brackets which support the operating parts. In order that but a single plane surface may be provided for the purpose stated, it becomes apparent that this surface must pass through or be in line with the centers of the crank shaft bearings and also must extend above the horizontal plane of the cylinders, otherwise it would become necessary to provide vertically planed surfaces to form a proper fit between the cover and the crank case adjacent the cylinders, so, therefore, it will be seen that the inclination of this plane surface in the manner shown is essential to obtain the advantages described.

The bracket 21 has a stud 28 on which is journaled a gear 29 which is driven from the gear 30 on the crank shaft. Iotatably connected with the gear 29 are two cams 31 and 32, the cams being locked in a certain relation to each other as well as connected to the gear by the pin 33. Cooperating with the cam 31 is a cam roller 34 on a stud 35 fixed in a finger 36 which is journaled on a stud 37 fixed in the bracket 21, the finger having connected therewith a crank arm 38 which is pivotally connected to arod 39. Also cooperating with the cam 31 is a cam roller 40 upon a stud 41 fixed in a finger 42 which is journaled on a stud 43 also fixed in the gear bracket 21 and having connected therewith a crank arm 44 pivotally connected to the rod 45. Coperating with the cam 32 is a cam roller 46 on a stud 47 fixed in the linger 48, journaled on the stud 37 and also connected with the crank arm 38. Also coperating with the said cam 32 is a cam roller 49 journaled on the stud 5() fixed in the finger 51 which is also journaled on the stud 43 and connected with the crank arm 44.

In the present construction the cam roller of each pair of cam fingers are set ninety degrees apart, the two cranks of the crank shaft are arranged 180 degrees apart, and the ratio of gearing between the crank shaft and the cam is two to one, the cams revolving one half as fast as the crank shaft.

The conformation and disposition of the cams is such that the rod 39 will be moved in one direction to open the inlet valve and in the opposite direction to open the exhaust valve of one of the cylinders while the rod 45 will be moved in one direction to open the inlet valve and in the opposite direction to open the exhaust valve of the other cylinder. The rod 39 is connected to an arm 52 on a sleeve 53 journaled loosely on the shaft 54 which extends transversely across the heads of the cylinders 3 and 4, being journaled in bearings and 56. The sleeve 53 has connected therewith rocker arms 57 and 58 which carry adjustable valve tappets 57EL and 58a which are arranged in line with the valve stems 59 and 60 of the valves of the cylinder 4. The rod 45 is connected with an arm 61 on a collar 62 which is connected to the shaft 54. The shaft also has connected to its other end a collar 63 which has integrally formed arms 64 and 65 carrying adjustable valve tappets 64a and 65a arranged in line with the valve stems (not shown) of cylinder 3.

The shaft 54, its rocker arms and the valve tappets, as well as the bearings for the shaft, are located in a cylinder head extension 66 which is connected to the main head 67 of the cylinders and has an inlet passageway 68 for the fuel communicating with a pasageway 69 in the main head; this head extension being closed by a cover 70.

By the construction of valve mechanism described, I am enabled to arrange the usual transverse shaft required to operate the valves of some of the cylinders, where a plurality of cylinders are employed, at those ends of the cylinders opposite the'crank case, thus eliminating the necessity of extending suchv transverse shaft with its accompanyingoperating parts through the crank case, or through the cover, which arrangement would interfere with the construction described whereby I obtain an unencumbered cover for the crank case, or would lead to other difficulties which would make an impracticable and undesirable construction.

Having thus described my invention, I claim 1. In an internal combustion engine, a one-piece base portion consisting of a central base, a side base member, a crank shaft supported within the central portion, gear mechanism supported within the side base portion, the central base portion and the si de base portion being provided with finished alined surfaces around their exterior parts, and means on said surfaces for supporting the parts mentioned above.

2. In an internal combustion engine, an open top crank case of a one-piece construction consisting of a central part, and a side part, a cover for same, said case being provided with iinished alined surfaces around its exterior part, and gear mechanism supported within said side portion from one of said alined surfaces, substantially as specified.

3. In an internal combustion engine, an open top crank case of a one-piece construction consisting of a central part and a side part, both of said parts being provided with finished alined surfaces around the exterior, a cover for said crank case, and gear mechanism supported in said side part from brackets projecting from one of said alined surfaces, substantially as specified.

4. In an internal combustion engine, an open top crank case having a central portion and also a side portion, both of said portions being formed With alined surfaces, a cover for said crank case fitting upon said alined surfaces, and gear mechanism located Within said side portion and supported from one of the alined surfaces of said open top crank case, substantially as specified.

5. In an internal combustion engine, an open top crank case having a central portion and a side portion provided With alined surfaces about the open part thereof, and a cover for both of said parts fitting upon said alined surfaces, operating parts located Within said side portion and projecting therefrom by means of bracket supports extending from the alined surfaces of said open top case, substantially as specified.

6. In an internal combustion engine, an open top crank case having a central inclosing portion and a side inclosing portion, a crank and fly-Wheel located Within said central portion, alined surfaces around the exterior of said crank case, and means for supporting said crank and fly-Wheel upon said alined surfaces, the said side portion being capable of supporting some of the operating parts by means projecting from the alined surfaces thereof for the purpose specified.

7. In an internal combustion engine, an open top casing having a housing at one side thereof, said casing and housingj having alined upper machined surfaces, a cover fitted to said surfaces, bearings for a crank shaft formed in the casing and cover with their transverse centers in the plane of the finished surface of said casing, and a gearing bracket secured to the surface of said casing adjacent said housing.

8. In an internal combustion engine, an open top crank casing having a gear and bearing housing on one side thereof and a bearing housing on the opposite side thereof, said housing and casings having alined upper surfaces, a cover fitted to said surfaces, bearings for a crank shaft formed in the casing and cover and projecting into said housings with their transverse centers in the plane of the finished surface of said casing, and a gear bracket secured to the surface of said casing adjacent said gear housing.

In testimony whereof, I have hereunto set my hand this 29th day of January, 1918.

ALBERT Y. EDWARDS.

Witness:

CHAs. I. WELCH.

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