US1614768A

US1614768A - Oscillating valve for internal-combustion engines

Info

Publication number: US1614768A
Application number: US71144A
Authority: US
Inventors: Nat H Ament
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-11-24
Filing date: 1925-11-24
Publication date: 1927-01-18
Anticipated expiration: 1944-01-18

Description

Jan. 18, v N. H. AMENT OSCILLATING VALVE FOR INTERNAL COMBUSTION ENGINES Filed Nov. 24, 1925- 2 Sheets-Sheet 1 Inwnior' 72d lifl m n fl ital" l2 e g/s.

Jan. 18,1927. 1.614.768

N. H. AMEVNT OSCILLATING VALVE FOR INTERNAL COMBUSTION ENGINES Filed Nov. 24, 1925 2 sheets-Sheet 2 Q n O A 7 x 51 a s ///////////////////g I//////// //II//I////I/b f5 Invenior 72a! Jlflmeni Patented Jan. 18, 1927.

UNITED STATES PATENT OFFICE.

OSCILLATING VALVE FOR INTERNAL-COMBUSTION ENGTNES.

Application filed November 24, 1925. Serial No. 71,144.

My invention is an oscillating valve for internal combustion engines.

An object of my invention is to utilize a pair of "alves of'the rotary type, but to oscillate said valves through a portion of a revolution, one of the valves being an inlet and the other an exhaust valve.

A further object of my invention is to operate oscillating valves by the cam shaft and devices of the valve tappet type, and

by means of the shape of the cam to ive a quick opening and shut off to the va ves With a comparatively slow motion While they are substantially wide open.

A further feature of my invention is to operate oscillating valves positioned transversely of the cylinder from an overhead cam shaft, through the medium of the rocker arms and tappet rods.

In my invention I utilize oscillating valves shaped preferably tapering, positioned on opposite sides of the cylinder and preferably having their axes transverse of the axis of the cylinder. The valves are oscillated through a partial turn by a cam shaft, the motion. being transferred by rocker arms and tappet rods.

My invention will be more readily understood from the following description and drawings, in which:

Figure 1 is a front view of an engine with my oscillating type of valves installed therein.

Fig. 2 is a plan of an engine havin my valve, as if viewed in the direction oi the arrow 2 of Fig. 1, with part of the cylinder head removed, exposing portions of the valves.

Fig. 3 is a side view taken inthe direction of the arrow 3 of Figs. 1 or 2, showing part of the cylinder head broken away to expose one of the valves.

Fig. 4 is a vertical section on the line 4-4 of Fig. 2, in the direction of the arrows.

Fig. 5 is an enlarged longitudinal sectional view of the valve showing the ball thrust bearing at one end and means to hold the valve in tight. position.

My invention of oscillating valves is illustrated as applied to a single cylinder engine, but it is obvious that it may be adapted to and utilized with multiple cylinder engines.

In the drawings the engine cylinder is designated generally by the numeral 1, the

cylinder head being designated by the nuexhaust. These are each formed of a tapered rod 11, having a radial arm 12 attached to the large end, the arm having a radial slot 13. A stem 14 forms a continuation of the small end of the rod and has a screw threaded end 15. Each of the valves has a port 16 extending diametrically thereacross, this port being elongated in the axial direction of the valve as indicated by the numeral 17 and being comparatively short in a circumferential direction as indicated by the numeral 18. The valves operate in a tapered bushing 19, this latter being snugly fitted in the tapered bearing 20 formed in the cylinder head.

A washer 21 is fitted over the stem 14 and bears against the end 22 of the cylinder head casting. An anti-friction bearing 23 indicated as a ball bearing is also fitted on the stem and backs against a nut 24 threaded on the end 15 of the stem. A strong compression spring 25 bears against the washer 21 and the anti-friction bearing 23; thus drawing the valve snugly into the bushing 19 and forming a gas-tight fit. A cover plate 26 forms a covering for the stem and the above devices associated therewith, such construction being clearly shown in Fig. 3.

The cam shaft 6 is operated in the usual Way by means of a vertical shaft 27, having a bevel gear 28 in mesh with a bevel gear 29 on the cam shaft. The cam shaft is preferably mounted in journal housings 30 at opposite ends of the cylinder and the cams 31 are on the outer end of the cam shaft.

Fixed

rods

32 and 33 are mounted on the cylinder head in brackets 34, the rod 32 having the rock arm 35 and the rod 33 having the rock arm 36, these rock arms being free to oscillate on the said rods.

Each of the rock shafts has a roller 37 bearing on the cam 31 and a finger 38 adapted to engage the upper end of the tappet rods 10. These latter are slidably mounted in boxes 39 at the opposite ends of the cylinder head, the tappet rods having the collar 40 hearing against a pin ll andv a strong compression spring 42 normally thrusting the tappet rods upwardly. A transverse pin 43 on the lower end of the rods engages in the slot 13 of the radial arm 12 integral with the valve rods 11.

The manner of operation of the valve mechanism so far described is substantially as follows:

The cam shaft will be rotated at half the speed ofthe crank shaft in the usual manner and the cams on the cam shatt't operate the rock shafts in substantially the same manner as in overhead tappetvalve engines, the rock shafts operating the tappet rods 10 to depress these at the proper position of the stroke of the piston. Thus the oscillating valves are partially rotated on the downward stroke of the pistons to have a downward turn on the side adjacent the cylinder, the speed of n'iovenient of the valves being dependent on the shape of the cam 31. The cams may have a different shape for the inlet and exhaust if desired so as to give the proper movement in actuating the valves.

hen the rock arms are thrust upwardly by thesprings 42, the oscillating valves are quickly rotated back to their normal closed position where they are left at rest until the next operation of the valves.

It will thus be seen that the valve action is very rapid and is not subject to the jarring action of tappet valves.

The general construction of the cylinder and cylinder head is substantially as follows:

A main water acket is formed at the upper end of the cylinder encircling the same and communicates'with passages 51 and with the upper water jacket 52 in the top of the head.

Stationary passages

53 and 5% are for the inlet and exhaust gases, being the same for both of the valve.

Aspark plug 54 is mounted in the center of the cylinder over the combustion chamber The cylinder casting is provided with a laterally extending base '56, this latter supporting a column 57 in which is located the vertical shaft 27 for driving the cam shaft. The brackets 3t-have caps 58, the latter being bolted through to the cylinder head by bolts 59, thus firmly clamping the rods 32 and 83. I

It will thus be seen that I have developed a simplev motor construction with a simplified form of valve, these being of the oscillating type and operated by readily accessible overhead cam shaft through rock arms and tappet rods. It is obvious that the general construction may be changed to adapt my invention of oscillatory valves to a multicylinder engine, the particular arrangement ofthe tappet valves being changedaccordingly. The arrangement may be made having continuous oscillating valves for all the cylinders in alinernent or a separate set of valves for each of the cylinders.

Such changes inthe general construction or specific details will be within the scope of my invention as set forth in the specification, drawings and claims.

The oiling system for my oscillating valve is constructed substantially as follows:

The oil inlet pipes 65 lead to the cylinder head adjacent the large end of the tapered valve and connect toducts 66. in the said head. Ducts 67 are formed through the tapered bushing 19 and lead to annular grooves 68 on one side of the port 16. Grooves 69 and 70 are formed in the bushing extending longitudinally thereof between the inlet and exhaust gas passages 53 and 5st and connect with a second annular groove 71 formed at the other end of the port 16. This groove leads to a duct 72 through the bushing and a duct 73 through the cylinder head leads to outlet pipes 74 from the small end of the tapered valve.

The oiling would preferably be by pressure and this gives a flow of oil spreading over the enlarged; end of the tapered valve, a relatively thick film adjacent the port and having a discharge adjacent the tapered end of the valve.

The arrangement of the inlet and outlet pipes are also such that the oil has a general downward flow from the inlet duct 66 to the outlet duct 73. This oiling system gives a film on the whole of the valve.

Having described my invention, what I claim is: I

1. In an internal combustion engine having a cylinder witha cylinder head, an oscillating inlet and exhaust valve on opposite sides of the cylinder head with their axes transverse to the axis of the cylinder, a radial arm having a radial slot connected to one end of'each valve, a cam shaft in the cylinder head, a pair of rock arms, a pair of tappet rods having pins engaging in the said radial slot. said tappet rods operatively connecting with the said rock arms.

2. In an internal combustion engine having a cylinder with a cylinder head, an oscillating tapered inlet and exhaust valve on opposite sides of the cylinder with their axes transverse to the axis of the cylinder, said valvestaperingin opposite directions, radial arms having a radial slot secured to the large ends of each. of the valves,a cam shaft in the cylinder head, a pair of rock arms and a pair of tappet rods having pins engaging in the said radial slots, said tappet rods being operatively connected with said rock arms.

3. In an internal combustion engine, a cylinder having a cylinder head, a cam shaft mounted in the cylinder. head, a pair ofrods above the cam shaft and. parallel thereto, a

rock arm mounted on the ends of each of the rods on opposite ends of the cylinder head, a pair of oscillating valves, a tappet connected to each of the valves and operatively engaging the rock arms.

4. In an internal combustion engine as claimed in claim 3, in which the cam shaft is mounted in journals at opposite ends of the cylinder head with a cam on each end of the rod outside the journals and the said rods are mounted in brackets at each end of the cylinder head, the rock arms being positioned at the end of the cylinder head.

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

NAT H. AMENT.