US1473139A - Engine-cylinder-sleeve sealing means - Google Patents

Description

Q NBv-Q' 1923. 1

A. A.BULL ET "AL ENGINE CYLINDER SLEEVE SEALING MEANS Filed July 2, 1920 fi/fifme @51 Q'ttoz'ne vw REX, 0.0/11? W 7 Patented Nov. 6, 1923.

p 1,473,139 PATENT OFFICE}.

ARTHUR A. BULL AND REX C. DAR-HELL, 0F DETROIT, MICHIGAN, ASSIGNORS TO GENERAL MOTORS CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF DELAWARE.

ENGINE-CYLINDER-SLEEVE SEALING MEANS.

Application filed July 2,

T 0 all whom iv may concern.

Be it known that we, ARTHUR A. B LL and Bax C. DARNELL, subject of the of Great Britain, and citizen of the Unitec States, respectively, and residents of Detroit, county of Wayne, and State of Michigan, have invented certain new and useful Improvements in Engine-CylindenSleeve Sealing Means, of :which the follow ng is a full, clear, concise, and exact description, such as will enable others skilled in the art towhich the invention relates to make and use the same, reference being made therem to the accompanying drawings, which form a part of this Specification.

The invention relates to hydro-carbon I motors having removable cylinders, and particularly to the shape and form of cylinders and the general arrangement of the gaskets therefor. I

One of the objects of the invention is the provision of means for permitting the cylinders to be removed and at the same time permitting them to expand uniformly under the influence of the heat developed by the explosions.

Another object of the invention is the provision of means on the cylinders whereby .when they are forced home in the jacket the gaskets employed therewith will be compressed so as to form joints between the cylinders and jackets that are proof agamst leakage of water and gases.

A still further object of the invention is to provide a motor having a built-up cylin= der and jacket construction that may be readily assembled and disassembled which is comparatively inexpensive and simple to manufacture. I

Other objects and advantages will appear from the following description and claims.

On the drawing z 7 Fig. 1, represents a vertical section of an engine showing a cylinder in operative position in its jacket. I

Fig. 2, is a vertical section on an enlarged scale, parts broken away, showing the cylinder in position to be forced to its seat in the jacket; and

Fig. 3, is a similar view showing the cylin'- der in its operative position in the jacket.

Fig. 1, is a plan view on section line 4- 1 of Fig. 1, parts broken away.

Referring to the drawing the reference its entire circumference with a cut-away 1920. Serial No. 393,740.

numeral 1 designates a hydro-carbon engine having one or more cylinders, which may be of any type, but as here shown is of the 5. head type of cylinder, i. e., one in which the valves are located laterally of the cylin- As shown, the engine is provided with the usual carburetor 2, intake 3, exhaust manifold t, intake valve 4: exhaust valve 5 and piston 5.

The jacket or casing 6 has at its upper end an inwardly extending support 7 counterbored to provide a seat 8 in which fits the flange 12 of a removable cylinder 10. The thickness of the flange 12 is the same as the depth of the seat 8. An inwardly extending support 11 at the opposite end of the casing engages the lower end of the cylinder. For convenience of description the supports 7 and 11 are termed the upper and lower supports respectively.

The cylinder 10 having one end tapered fora portion of its length is provided at its other end with a flange 12 which, when it is firmly seated on the seat 8, has its upper edge flush with the upper end of the casing or jacket 6. The flange 12 is provided about ortion forming a camming surface. Tiny form of camming surface may be employed, the one shown is formed by beveling the lower corner of the flange 12 to form the inclined or cumming surfme 13.

A gasket 14. preferably of some fire-proof material is adapted to be engaged by the camming or inclined surface 13 on the flange, to distort and force it into the corner formed by the bottom and side walls of the seat 8 when the cylinder is forced to its operative position. The gasket is of such size that it is made to completely fill the space between the beveled portion of the flange 12 and the side and bottom walls of the seat permits the use of such a gasket. It will be noted that the cylinder has a uniform bore and that its lower end is tapered from its outer surface as shown at 17.

It will thus be apparent that when the cylinder is forced to position through the support 7 to seat the flange 12 firmly on the seat 8 the lower end of the cylinder will readily pass through the gaskets 1G and that the inclined surface 17 will compress the same to form awater tight joint without it being necessary to make more than a snug fit befluid. By this arrangement the cooling fluid comes in direct contact with the walls of the cylinder itself.

A cap or cylinder head provided with the usual spark plug 18 ignition chamber 19 and space 20 for the cooling fluid, has its inner portion 25 extending across the joint between the cylinder flange and the jacket or casing. In applying the bolts 21 to secure the cap or cylinder head in position the surface 25 will engage the flange 12 to force the lower surfaces 13 and 26 of the flange 12 in firm engagement againstthe gasket 14 and the upper surface of the shoulder or seat 8, re-

spectively, to thereby secure the cylinder firmly in position whereby a. non-lealnible fire-proof joint is produced. A gasket 22 is interposed between the cylinder head and the jacket or casing 6.

' It will be observed by reference to Fig. 4: that the portion 25 extends inward onto the flange 12 of the cylinder for a greater portion of the. eircumfercnce of the cvlil'ider,

thus protecting the joint between the flange 12 and the jacket or casing 6, but leaving the portion of the joint adjacent the valve unprotected. It is on account of this exposed portion of the oint and the consequent leakage of the explosive mixture and products of combustion through the joint at this .point that removable cylinders have here tofore been confined in their use to the over head valve type of engine. But with the use of the joint described above. removable cylinders may be employed with any type of engines.

It will also be observed that the lower surface 26 of the flange 12 is in direct engagement with the inner portion of the bottom wall of the seat 8. The flange 12 being the same thickness as the depth of the counterbore in the support 7, the upper surface of the cylinder. will remain under all conditions flush with the upper surface of the rising or jacket 6, whereby the cap .24

will hear at all times against both of these surfaces to thereby prevent the cylinder from becoming loose within its supports.

W e claim:

1. In a device of the class described, a cas upper and lower cylinder supports with in said casing, a seat. in the upper support, a gasket on said seat, a removable cylinder within said supports, and supportingmeans on said cylinder engaging said seat and provided with a camming surface for distorting sa-id gasket, whereby when said cylinder is forced to operative position in said supports a non-leakable joint is produced between said supporting means of said cylinder and the upper support, substantially as described.

2. In an internal combustion engine, a casing, upper and lower cylinder supports secured to said casing and extending in wardly therefrom, a seat in the upper support, a gasket on said seat, an inwardly opening groove within said lower support, a gasket within said groove, a removable cylinder held by said supports, said cylinder having at one end a flange provided with a cinnn'iing surface for distorting the first mentioned gasket and forcing it against the side and bottom walls of the said seat, and having at its other end a tapered surface for compressing said second mentioned gas:- ket, whereby a. water-tight compartment is provided for the cooling fluid between the supports and the walls of the cylinder and. easing.

8. In an internal. combustion engine, an engine casing having a countcrbore forming a seat in one end thereof, a gasket within said seat, a removable cylinder having a flange. on one end for engaging said seat, said flange having a cumming surface for distorting said gasket against said seat, valves for said cylinder located laterally thereof, and a cap having a combustion chamber for inclosing. said valve and one end of said cylinder, said cap engaging said flange, substantially as shown and described.

In testimony whereof we aflix our signatures.

ARTHUR A. BULL. REX o. DARNELL.

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