US1722517A

US1722517A - Internal-combustion engine

Info

Publication number: US1722517A
Application number: US189083A
Authority: US
Inventors: Henry E Curtis
Original assignee: JOHN H BETTS
Current assignee: JOHN H BETTS
Priority date: 1927-05-05
Filing date: 1927-05-05
Publication date: 1929-07-30
Anticipated expiration: 1946-07-30

Description

. .Hufiy 3Q, 1929. H E CURTflg 3,7225%? INTERNAL COMBUSTION ENGINE Filed May 5, 1927 FIGURE 2' BNVENTQR 0 in spaced relation thereto.

Patented y to. less.

HENRY E. CURTIS, 01? SAN JOSE, CELIFQRIQ IA, ASSIGNOR QF ONE-HATE D0 J6EE H.

BETTS 0F LONG BEACH, CALIFORNIA.

IHTERNAL-GQHBTJETIG N ENG-ENE.

Application filed May 5, 1327. Serial No. mess.

The present invention relates particularly to the piston head of an internal combustion engine and its relation to the combustion chamber of the engine.

It is the object of the present invention to provide a construction of the character indicated so formed and arranged as to positively effect more perfect combustion of the explosive mixture on compression.

It is also an object of the invention. to provide a structure of the character indicated that will be simple in form and construction, economical to manufacture, and highly elficient in its practical application.

In the drawing:

Figure l is a vertical transverse section through a portion of arrengine embodying my invention.

Figure 2 is a plan view of the portion of an engine shown in Figure -1, part broken away.

Referring more particularly to the drawing, I show at l a portion of a cylinder block of an internal combustion engine with a portion of a cylinder shown at 2. The combustion hamber is shown at 3 with a valve opening shown at 4: on a plane with the upper end of the cylinder 2'. The head 5 encompasses the combustion chamber 3, a portion of which is conical in form as shown at 6. The base of the conical portion 6 is preferably circular in form. as at 7, and a portion of this circular part overlaps the cylinder 2 a distance as at 8 and, of course, The opening 9 is for the reception of a spark plug, not shown.

In the cylinder 2 is a piston 10 having its forward, or working, end 11 formed as follows. That portion of the end of the piston operating directly under the conical portion 6 of the combustion chamber pro jects forwardly of the rest of the piston end as at 12 so that when the piston has reached the limit of its compression stroke the part 12 extends into the conical portionof the combustion. chamber. The inner surface of" the part 12 slopes in an easy curve away therefrom as at 13 and. is slightly spaced from the edge 7 when the piston is in the said advanced position. This surface continues in a downward curve as at 14: until it approaches the sides of the piston whereupon it curves, abruptly upwardly as at 15, defining the inner side of the wall 16.

The wall 16 is in alignment with the outer surface of the piston and merges with. the forwardly projecting portion 1.2 at 17 and 18, a distance from its extreme end.

When the engine is in operation the'ex- 'plosion occurs when the piston 10 is in the position shown. The burning gases, under the force of the explosion, pass through the narrow space '19 being directed downwardly and angularly by the flaring surface of the conical portion 6 in conjunction with the sloping surface .13. These gases are 'constrained to move in the direction indicated by the arrows 20, passing over the

surfaces

14 and 15 and then along the end Wall 21 of the combustion chamber. This movement of the burning gases is important, because in this manner the surfaces are all burned clean and remain clean of all carbon, the gases projected into the chamber above the piston end burning from the outside toward the center instead of from the center toward the outside as is ordinarily the case.

The diffusion of the burning gases over the entire surface of the piston end and the adjacent surface of the explosion chamber is rendered positive and complete by the narrow slot 19 existing at'the time of the explosion and which directs the gases fanwise over the surfaces 1 l and 15, thereby creating a turbulence that effects a perfect progressive burning of the mixture and .eiiectually eliminates the knocking originating in the spotty burning-of the mixture.

lit is to be understood, of course, that while T have herein shown and described but onespecilic embodiment of the invention, changes in form, construction, arrangement and method of operation may be made within the scope of the appended claims.

I claim:

1. in an internal combustion engine, the combination of a cylinder, a iston therein having a curvilinear end s'ur "ace cooperating with the opposing end of'the cylinder to form a combustion chamber and a portion projecting forwardly of the piston, and an explosion chamber having a portion angularlyoverlying the projecting portion of the piston and closely approaching the same at the extreme limit of its forward move-.

ment to form-a restricted passage between the chambers.

2. In an internal combustion engine, the

till

combination of a cylinder, a piston therein having an end surface sloping inwardly from one side toward the other and cooperating with the opposing end of the cylinder to form a'conibustion chamber, and an explosion chamber having a surface forihed thereon approaching the forward portion ofthe said piston surface to form a slot there between when the piston is at the end of its forward stroke.

3. In an internal combustion engine, the combination of a cylinder, a piston therein having an end surface sloping inwardly from one side toward the other and then outwardly a distance and cooperating with the opposing end of the cylinder to form a combustion chamber, and an explosion chamber having a surface formed thereon lying in part opposite the end of the piston and approaching the forward portion of its sloping surface to form a restricted passage therebetween when the piston is at the forward end of its stroke.

, 4. An internal combustion engine including a conical explosion chamber a cylinder communicating therewith and oilset relative thereto, the explosion chamber being positioned forwardly of the cylinder and overlapping the same, and a piston in the cylinder having a portion of one end projecting forwardly a distance to extend into the explosion chamber at the limit of its compression stroke, the inner surface of the projecting part cooperating with the opposing sun.

face of the explosion chamber in said advanced position to-form a restricted passage and curving backwardly toward the sides of the piston and thence abruptly forwardly to form the inner side'of a forwardly projecting rim, the outer surface of the rim aligning with the outer surface of the piston, and the rim merging; at both ends with the base of said forwardly projecting portion.

5. An internal combustion engine including an explosion chamber and a combustion chamber arranged in ofi'set relation to each other both transversely and longitudinally, the combustion chamber being formed by one end of the engine piston and the opformed inpart by the engine piston at the end oi. its compression stroke, and a restricted passage connecting the chambers at the time of each explosion and formed in part by the engine piston at the end of its compression stroke,

HENRY E. CURTIS.

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