US1965466A - Valve mechanism for internal combustion engines - Google Patents

Description

y 3, 1934- 6 R. s. MOORE 1,965,466

VALVE MECHANISM FOR INTERNAL CQMBUs'lloN ENGINES I Filed March 1, 19:55 :5 Sheets-Sheet 1 R. s. MOORE July 3, 1934.

VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINES Filed March 1, 1953 5 Sheets-Sheet '2 xm, WM m s July 3, 1934. R, my; 1,965,466

VALVE MECHANISM FOR INTERNAL COMBUSTION ENGI INES Filed March 1, 1953 3'Sheets-Sheet 3 Patented July 3, 1934 UNITED STATES PATENT OFFICE VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINES Robert S. Moore, Silver Spring, Md., assignor to General 'Airmotors Company, Scranton, Pa., a corporation of Pennsylvania I Application March 1,1933, Serial No. 659,224

2 Claims. (01. 123-90 The invention relates to new and useful imspring 13 of the usual type which maintains the provements in a valve mechanism for internal valve in its closed position. Leading from this combustion engines and more particularly to the exhaust port 4 is an L-shaped port 14 in mounting for the valve rockers. v the poultice head 8, and the exhaust manifold An object of the invention is to provide a valve 15 is connected to the poultice head so that the mechanism wherein the bracket supporting the gases passing through this port '14 are led into rockers is so mounted as to be shifted, by the this manifold. Controlling the intake port 2 is expansion of the cylinder head incident to the a valve 16 which is supported by a valve stem heat of combustion, to maintain the clearance sliding in the poultice head and raised to closed 10 between the valve stems and the rockers substanposition by a spring 17. The valve port 2 as tially uniform. 3 shown in broken lines in Figure 2 leads to an L- In the drawings: shaped port 18.1 Connected to the poultice head Figure 1 is a sectional view longitudinally and 8 is an intake manifold pipe 19 which'supplies centrally of one of the cylinders of an engine fuel gas to the intake port 2. The intake port 3 15 embodying the improvements. is controlled by a similar valve which may be in- Figure-2 is anenlarged plan view of a portion dicated in general by the reference numeral 20. of the same. There is a similar spring which normally holds The present invention has to do with a valve this valveclosed. There is an L-shaped port operating mechanism for internal combustion enleading from the intake port 3 which is indicated 20 gines, and more particularly to the manner of at 21 in Figure 2 of the drawings, and this intake mounting the bracket supporting the, rockers port is supplied with fuel gas from the manifold which control the valves. pipe 22. The intake manifold'pipe 19 and the As illustrated in the drawings the combustion intake manifold pipe 22 are connected to a comengine includes a cylinder 1, provided with two mon intake manifold pipe 23. The intake maniintake ports and one exhaust port. The centers fold pipe 23 is connected with a fuel supply of these ports are arranged so that lines conchamber 24 inwhich is locatedafuel gas distribunecting the same form an isosceles triangle with tor 25. When the take ports are open fuel gas the centers of the intake ports at the base of the is supplied through this intake manifold pipe triangle. 1 have found the best results are ob- 23 to the branch pipes 19 and 22, and thus equally tained when the ports are so dimensioned that the through the intake ports to the combustion chamcombined area of the intake ports is greater than her of the engine cylinder. the area of the exhaust port and the area of the The exhaust valve is opened by means of a the exhaust port is greater than the area of either rocker 26 which is pivotally supported on a bearintake port. The particular arrangement of the ing 2'7 mounted in a bracket 28, said rocker bears ports and the relative dimensions of the same on the outer end of a disk 29 carriedby the valve r 110 part f h pr ent invention per se, but stem supporting the valve 12. when said rocker s the Subject of y (LO-pending divisional app is turned in a counter-clockwise direction as cat on, Serial fi d y 1933, viewed in Figure l, the exhaust valve will be Patent No. 1,915,237. opened. The rocker is actuated by means of a 40 The cylinder 1 is shown in Figure 1 as attached rod 30 carrying a, ball stud 31 at its upper end to th engine Casing 5 through u a bOltS fitting in a socket 32 in the end of the rocker 26. 6. The engine is illustrated as of the poultice Thi r d at it lower d engages a tappet 33 ead yp This yp of engine is Shown, rying a roller 34 bearing on a cam 35. Said rod scribed and claimed in my prior Patent #1,820,475 30 has adjustably attached thereto a projecting granted August 25, 1931, and detail description ball tud which engages a, socket in the tappet 33, 5 thereof is n t thought necessary The exhaust As the cam rotates, the tappet will be raised and p t 4 s wn n Figure 1 of the w n a d lowered, and this will cause the exhaust valve to the section through the head iS between the be positively opened and permit-it to be closed i P The Poultice head 8 is attached under the action of the spring. The bracket 28 is r tothe cylinder head and serves as a connection shown i perspective in Fi r 5 f thed m g f0! the intake manifold and the exhaust manisaid bracket is provided with spaced bearing p01; i fold. a support for the v the p s closing tions 36 and 37. The rocker 26 lies between these the same, and the rockers which control the bearing ortion and is supported by the bearing valves. sleeve which in turn is carried by a supporting 55 Within the casing 5 is the main shaft '7 which pin 3 extending t b t openings 39, 39 in has a crank 9 associated with the cylinder 1. A th bearing m ber 36 and 3'7 of the bracket, piston rod 10 engages the crank and is connected This bracket 28 has a forwardly projecting arm to the piston 11. 40 which extends between two bearing blocks 41 The exhaust port 4 is controlled by a valve and 42 secured to the poultice head and the en- '60 12. Surrounding the stem of the valve 12 is a glue cylinder by abolt 43. The armhasan open- 1 therefrom. The rod 47 ing 44 therethrough and the bolt passes through this opening. The bracket has laterally projecting trunnions 45 which engage recesses in the bearing blocks 41 and 42. The opening 44 is of sufficient size so as to allow a slight rocking movement of the bracket which is trunnioned on these supporting blocks, while the supporting blocks are in turn rigidly clamped. to the engine cylinder. The bracket 28 at its other end is provided with spaced projecting arms 46. A bar 47 extends between the arms 46, 46 and is pivotally connected to the bracket by a pin 48 which pass through the upper end of the bar 47 and through the two arms 46, 46. This bar 47, at its lower end, is connected to a stud member 49 which may be adjusted in the engine casing for setting the bracket in the desired position. There is a plate 50 bolted to the engine by bolts 51 which project upwardly between the arms 46, 46', but said plate merely serves to prevent lateral movement of the bracket. By removing the bolt 43 the bracket may be lifted from the engine. cylinder, carrying with it the rocker 26 which is readily disconnected from the rod 30. The rod 47 bears on the adjustable stud 49 and can be readily disconnected carries an adjustable ball stud which engages a'socket in the supporting stud 49. j

The intake valves are operated from a common rocker which is in the form of a yoke. Said rocker is provided with spaced bearing members 52 and 53. These bearing members are spaced so that they will receive the members 36 and 37 of the bracket therebetween. Bearing-sleeves are located .within these members 52, 53 and are mounted on the supporting pin 38. This supporting pin is in the form of a sleeve and a headed bolt 54 passes therethrough, and a nut 55 on the other end thereof clamps the bearing plates 56, 56 against the end of the sleeve, and this holds the bearings in the bracket and the rockers assembled on the bracket so that they may freely rock thereon. The members 52, 53 are connected by the yoke member 57, and this yoke member 57 is provided with a recess 58 which receives a ball stud 59 at the upper end of a rod 60. This rod 60 bears on the tappet 61 which carries a roller 62 engaging a sectional control cam 63. Said rod 60 carries a ball stud at-the lower end thereof which engages the socket in the tappet 61. The members 52, 53 carry respectively arms 64 and 65. The arm 64 is provided with an adjustable stud 66 which engages a disk 67 carried at the upper end of the valve stem controlling the intake valve for the intake port 2 indicated at 2. The arm 65 carries astud68 which engages a disk 69 at the upper end of the valve stem controlling the valve for the intake port indicated at 3. This rocker controlling the intake ports operate simultaneously on both of 'the intake ports. Inasmuch as the rocker merely has a bearing engagement with the upper ends of the" valve stems and a stud and socket connection with the rod 60, the bracket 28 with the two rockers assembled thereon can be readily removed as a unit or replaced whenever desired. The rod 47 supporting the outer end of the bracket is provided with a slot so that the rod 60 operating the rocker for the intakelvalves passes through said slot'and has a connection with the rocker centrally of the yoke. By adjusting the stud 49 the position of the bracket may be raised or lowered slightly. Any expansion of the metal parts incident to the heat of the exploded gases will raise or lower the bracket through its single point connection with the blocks 41 and 42, and thus maintain a uniform clearance space between the rockers and the valve stems. The bracket is raised and lowered by the permissive turning of the bracket on the pin 48 connecting the bracket to the rod 47.

From the above it will be noted that a mounting for the valve mechanism has been provided wherein the supporting bracket is not only shifted to compensate for the shifting of the valves due to the expansion of the cylinder head under heat, but said supporting bracket is guided in its shifting movements and is always maintained in a fixed vertical plane so as not to in any way disturb the action of the valve rockers. It will further be noted that there is a single point of connection between the supporting bracket for the rockers and the head of the cylinder which reduces to a minimum the weakeningof the cylinder head.

It is obvious that minor changes in the details of construction and the arrangement of the parts may be made without departing from the spirit of the invention as set forth in the appended claims. r

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is-

l. A valve compensating mechanism for in ternal combustion engines including in combination a cylinder having intake and exhaust ports in the head hereof, a valve for controlling each port, a spring associated with each valve,

rockers for operating the valves, a bracket for.

supporting the rockers, means for securing one end of said bracket to the head of the cylinder at a point adjacent the valves, means for securing the other end of said bracket to a cooler portion of the engine so as to be relatively nonexpansible, said bracket having spaced vertical walls, a bar attached to the cylinder head and extending between said vertical walls and contacting therewith so as to prevent lateral movement of said bracket o the means for securing the same to the cylinder head.

2. A valve compensating mechanism for internal combustion engines including in combination a cylinder having intake and exhaust ports in the head thereof, a valve for controlling each port, a spring associated with each valve, rockers for operating the valves, a bracket for supporting therockers, means for pivotally. attaching the inner end of said bracket to the cylinder head so as to permit said bracket to move about said pivot in a vertical plane including clamping means for securing the pivotal means to the cylinder head, means for securing the outer end of said bracket to a cooler portion of the engine so as to be relatively nonexpansible, said bracket having-"spaced vertical walls, a bar attached to the cylinder head ex- ROBERT S. MOORE.

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