US1472548A - Valve mechanism for internal-combustion engines - Google Patents

Description

E. R. BUFZTNETT VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINES Filed Dec. 22, 1920 2 Sheets-Sheet 1 may; [5.3a

Oct. 30 1923. H WZ 4LO E. R BURTNETT VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINES Filed e 22. 1920 2 Shams-Shaw 8 Patented Oct. 30, 1923.

EVERETT R. BURTNETT, OF LOS ANGELES, CALIFORNIA, ASSIGNOR 0F ONE-HALF TO HOMER A. BRUNELL, OF LOS *ANG-ELES, CALIFORNIA.

VALVE MECHANISM FOR'IN'IERNAIl-COMBUSTION ENGINES.

Application 'filed December 22, 1920. Serial No. 432,529.

and useful Improvements in Valve Mechanism for Internal-Combustion Engines, of which the following is a specification.

It is the object of this invention to provide,

a novel valve mechanism for an internal combustion engine including a plston valve received-within a valve chamber and a sleeve valve received upon the outside of the valve chamber in an annular space provided between the latter and an externalsleeve.

More specifically it is the object of the invention to provide a valve mechanism wherein excessive heating of the parts willv be prevented, and in which simple but eflicient actuating means are provided for the valve mechanism.

Further objects of the invention will be understood from the following description of the accompanying drawings, in which;

Figure 1 is a longitudinal section through a cylinder and valve mechanism of an internal combustion engine constructed in accordance with the invention.

Fig. 2 is a longitudinal-section on the line 2-2'of Fig. 1'. r

Fig. 3 is a side elevation, partly broken away, of an internal combustion engine showing the actuating mechanism for the improved valve structure.

Fig. 4 is a transverse section on the line 44 of Fig. 1.

In the drawings a working cylinder is shown at 1 surrounded by the water jacket 2. The working cylinder projects from a crank casing 3 through which extends the crank shaft 4. The Working piston3 is connected to connecting rod 6 which is mounted upon a crank throw 7 of shaft 4.

The valve mechanismincludes a cylinder 8 having the water jacket 9 surrounding the same throughout a portion of its len h and the radially spaced sleeve 10 surroun ing the opposite end of the cylinder 8. The casing for the-valvemechamsm, as thus constructed, is mounted upon the top of the casing forming cylinder 1 and water jacket 2 with the valve casing extending transversely of cylinder 1. The valve casing is, preferably. supported at 'an inclination to the axis of cy inder 1 and is so arranged that the end way of the port 30. A usual is arranged in the space 28.

thereof having the water jacket 9 is in' 1ongitudinal alinement with the cylinder 1, while the portion of-the valve cylinder having sleeve 10 projects laterally beyond the working cylinder. WVater jacket 9 may conmeet with water jacket 2 with an inlet 11 provided in jacket 2, andanoutlet 12 pro- Vided in jacket 9. i

At the side of the cylinder land valve cylinder 8 adjacent water jacket 9, a casing 13 is provided extending from crank casing 3 andloverlying the end of cylinder 8. This casing contains the actuatingmechanism for the valves, the end of cylinder 8 adjacent said actuating mechanism being open so as to readily receive operating connections from the actuating mechanism.

The actuating mechanism for the valves includes a shaft 14 journaled in the crank casing and rotated at one-half engine speed and in the direction of rotation of the crank shaft 4 by means of thetrain of gearing 15. Eccentrics '16 and 17 are fixed upon shaft 14 with the eccentric l7 one-fourth of-a revolutien in advance of eccentric 16. Rock arms 1 8-19 are connected to eccentric 1617 throu h the lugs 20, and these rock larms upwardly through casing 13. Intermediate of'their ends the rock arms are fulcrumed in rock bearings 21. The upper ends of the rock arms are in longitudinal alinement beyond the end of cylinder 8 and are provided with connecting links 22-23. These connecting linksare secured to the piston valve and the sleevevalve of the valve mechanism respectively, as will be hereinafter described.

A piston valve is mounted in cylinder 8 and is, preferably, formed asa sleeve 25 having piston heads 26-27 at its respective ends forming an annular space 28 between said piston heads. The piston valve is cylinder 8 opposite the sleeve 10. The space 28 is thus in alinement with working cylinder 1 and communicates with the same by spark plug 31 A. sleeve 32 extends through sleeve 25 with a shoulder 33 upon said sleeve abutting against. the end of sleeve 25 at the head 26, and nuts 34 threaded upon the opposite 'is-connected by an arm 52 to the end of sleeve 32 heyond the opposite end of sleeve and abutting against the same. The sleeve 82 is connected by the arm 85 to the link 22 so that-the movement of rock shaft 18 will reciprocate the piston valve within cylinder 8.

The sleeve valve of the valve mechanism is shown at 37 mounted in the annular space 38 between cylinder 8 and sleeve 10. The annular space 38 is open at its outer end as shown at 40, and the sleeve valve 37 is provided with an annular port 41 opening to space 38 at its outer end as shown at 42 and opening at its inner end through the inner periphery of the sleeve valve as shown at 43. The inner end of the sleeve valve is cut away at the side thereof, as shown at 44, so as to form a passage leading 'to an inlet 45 extending through the wall of sleeve 10 to the annular space 88.

The outer end of the sleeve valve is provided with a cap 46 extending over the outer open end 47 of the cylinder 8. A rod 48 extends through the sleeve 32, and the outer endof the same is provided with a shoulder 51 abutting against cap 46 with a continuation of said rod extending through cap 46. Nuts are threaded upon the outer end of said rod to detachably connect the sleeve valve to rod 48. The inner end of rod 48 link 23 so that movement of rock arm 19 will actuate sleeve valve 37'.

Ports 54 extend through cylinder 8 at the annular space 38. The sleeve valve 37 is arranged to move outwardlybeyond ports 54 so as to permit the latter to communicate "same by way of openings 43.

with inlet 45 through the passage 44, and is arranged to be moved inwardly so as to close ports 54 and subsequently open the It will be understood that the outer end of ports 41 is open to the space 38 which, at its open end 40, forms a discharge. The piston valve reciprocating within cylinder 8 is adapted to open and close ports 54 to the space 28 whic is in communication with the working cylinder by way of port 30. I

As shown in Fig. 1, when the working piston is upon its dead center at the beginning of the expansion stroke, the piston valve is atits inner limit of movement closing ports 54, and the sleeve valve'is midway of its movement and moving inwardly with ports 54 closed by said sleeve valve.

At the beginning of the succeeding exhaust stroke, the sleeve valve will have moved to cause openings 43 to register with ports 54, and during said exhaust stroke ports 54 will be gradually cut of? by the outward movement of the sleeve valve, The piston valve will still cover ports '54 as the exhaust stroke starts, but its continued outward movement will uncover said ports during said stroke. As a result an exhaust pas- Qo, ports ward movement'ot said head sa is provided by way of port port 41, and space discharge 4%. The sleeve valve eturned to the position shown in -Fig. l the suction stroke commences, and during said stroke the outward movement of said valve will open inlet to ports 54 by way oi passage At the same time ports 54, which have been uncovered by piston valve head 27, inward movement of said head. lVhiie the ports 54 remain open an inlet passage is provided through the same to space 28 and the port 80.

iihenthe ports compression stroke starts, 54 are closed by head 27 and the inwill retain said ports closed during the stroke. At the same time the inward movement of the' sleeve valve will also gradually shut off said ports iVhen the cycle of operation is thus completed, the ports will, again be in the position shown in Fig. 1 ready for a repetition of the engine action.

Various changes will be made withoutdeparting from the spirit of the invention as claimed.

What is claimed is:

1. An internal combustion engine including a working cylinder, a valve chamber extending across the top of said cylinder and communicating with the same at one end, a sleeve surrounding said valve chamber at the other end thereof to form an annular space between thevalve chamber and sleeve, a water jacket surrounding the first mentioned end of said valve chamber, a portleading from said valve chamber to said annular space, a piston valve within saidvalve chamber, and a sleeve valve within said annular space, said valves functioning to control the inlet and exhaust through said port. 4

2. An internal combustion engine including a working cylinder, a valve chamber extending across the top of said cylinder and communicating with the same, a sleeve surrounding said valve chamber to form an an nular space, a port leading from said valve chamber to said annular space, a piston valve within said valve chamber having heads at opposite sides of the communication with said working cylinder and forming a passage between said heads, and a sleeve valve within said annular space, said valves functioning to control the inlet and exhaust through said port.

3. An internal combustion engine including a working cylinder having a water jacket, a valve chamber extending across the top of said cylinder and communicating with the same, a sleeve surrounding said valve chamber to form an annular space, a partition in the latter forming a water jacket communicating with the water jacket of will be gradually cut off by the port leading from said valve chamber to said last mentioned space, a piston valve within said valve chamber, and a sleeve valve Within said last mentioned space, i

said valves functioning to control the inlet and exhaust through said port.

- tending across the top of said cylinder and communicating with the same, a sleeve surrounding said valve chamber to form an annular s ace, a valve cham er to said annular space,'a piston valve within said valve chamber controlling a passageway from the working cylinder to said port, and a sleeve valve within said annular space controlling fuel inlet and exhaust through said port and havingan annular port communicating with said annular space at its outer end and opening at its inner nd through the inner periphery ofthe sleeve valve. 1

5. An internal combustion engine including a working cylinder, a valve chamber extending across the top of said cylinder and communicating with the same, a sleeve surrounding said valve chamber to form an annular space, a ort leading from said valve chamber to sai annular space, a piston valve within said valve chamber controlling a passageway fromvthe working cylinder to said port, an inlet in said sleeve, a discharge from said annular space, and a sleeve -valve within said annular space and causing communication between said port and the inlet and exhaust.

6. An internal combustion engine including a working cylinder, a valve chamber extending across the top of said cylinder and.

communicating with the same, a sleeve surrounding said valve chamber to form an annular space, a port leading from said valve chamber to said annular space, a piston valve within said valve chamber controlling a passageway from the working cylinder to said ort, an inlet in said sleeve, the end of said s eeve being open to form an exhaust, and a sleeve valve within said annular space having an opening therethrough from its outer end to its inner periphery, said sleeve valve causing communication-between said port and said inlet beyond its inner end, and communication between said port andsaid exhaust through S id opening.

7. An internal combustion engine including a working cylinder, a valve chamber extending across the top of said cylinder and communicating with the same, a sleeve surexhaust through said 4. An internal combustion engine includ-' ing a working cylinder, a valve chamber ex= ort leading from said.

rounding said valve chamber to form an annular space, a port leading from said valve chamber to said annular space, a

piston valve within said valve chamber con trolling a passageway from the working cylinder to said port, a sleeve valve within said annular space controlling fuel inlet and ort, and rock arms having driving connections with the engine shaft for actuating said valves.

8. An internal combustion engine including a working cylinder, a valve chamber extending across the top of said cylinder and communicating with the same, a sleeve surrounding said valve chamber to form an annular space," a port leading from said valve chamber to said annular space, a piston valve within said valve chamber, a sleeve valve within said annular space, a driving connection fon'said piston valve, and a driving connection for said sleeve valve extending through said piston valve and connected to said sleeve valve at the outer end of said annular space.

9. An internal combustion engine including a working cylinder, avalve chamber extending across the top of said cylinder and communicating with the same, a sleeve surrounding said valve chamber to form an annular space, a port leading from said valve chamber to said annular space, a piston valve within said valve chamber, a sleeve valve within said annular space, a driving connection for said piston valve, and a driving connection for said sleeve valve extending through said piston valve and con nected to said sleeve valve at the outer end of said annular space, said valves being detachably secured to their driving connections.

10. An internal combustion engine 'including a working cylinder, a valve chamber extending across the to of said cylinder and communicating with t e same, a sleeve surrounding said valve chamber to form an annular space, a port leading from said valve chamber to said annular s ace, a piston valve Within said valve cham er, a sleeve valve .withinsaid annular space, a driving connection for said piston valve, a driving connection for said sleeve valve extending through said piston valve and connected to said sleeve valve at the outer end of said annular space, said valves being detachably secured to their driving connections, and means for removing said valves-through the outer ends of said valve chamber and annular space.

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

' EVERETT R. BURTNETT.

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