US1639217A

US1639217A - Internal-combustion engine

Info

Publication number: US1639217A
Application number: US108965A
Authority: US
Inventors: Dufwa Frederick William
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-05-13
Filing date: 1926-05-13
Publication date: 1927-08-16
Anticipated expiration: 1944-08-16

Description

F`. w. DuFwA INTERNAL COMBUSTION ENGINE Aug. 16,

I l Aug 6 1927 F. w. DuFwA INTERNAL coMUsTI'oN ENGINE Filed Nay- 13. 1926 3 sheetssheet z l lll/fill! s Aug. 16, 1927.

F. W. DUFWA INTERNAL COMBUSTION ENGINE Filed May 13. 1926 3 SheqtS-Sheet 3 Patented Aug. 16, 1927. l

UNITED STATES PATENT OFFICE.

FREDERICK WILLIAM DUFWA, OF MEXICO, MEXICO.

INTERNAL-COMBUSTION ENGINE.

Application led May 13,

rlhis invention relates to certain new and useful improvements in internal combustion engines and more particularly to the valve structure thereof, the primary object of the invention being to produce a motor wherein the valve structure is of a design to eliminate all hammering noises that are usually present in internal combustion engines of the type employing reciprocating control valves.

vWith the above and other object-s in view that vwill become apparent as the nature of the invention is better understood, the same consists of the novel form, combination and arrangement of parts hereinafter more fully described shown in the accompanying drawings and claimed. n

In the drawings, wherein like reference characters designate corresponding partsv throughout the several views,v j

YFigure 1 is a fragmentary front elevational view of an internal combustion engine lconstructed in accordance with the present invention,

Figure 2 is a side elevational view of the same, 'Y I Figure 3 isa vertical cross-sectional view showing the circular valveseat and swinging spherical valve, j

Figure l is a. fragmentary top plan view, Figure 5 is a detail sectional view showing the valve in the form of a sector of a sphere engaging the ring formation of valve seat, v l

Figure 6 is a detail sectional view of the valve showing Ventilating openings therein,

Figure 7 is cross sectional view of another forin of valve carrying shaft wherein heat radiating fins project inwardly' of the tubular shaft, l 1 f -Figure 8 -is a fragmentary sectional view showing pipe connections between opposite ends of the tubular valve carrying shaft and the water cooling chambers of the engine cylinder and head, 1

Figure 9 is a detail sectional view showing the strap connection between Ythe hollow Vvalve and the tubular `valve carrying shaft, Figures 10 and 11 show sectional -views of other forms vof air cooled valves and shafts, and f Figures 12 and 13 show eccentrically operatedv'alves, respectively, in,y closed and open positions. L i

Referring more in detail to the accompanying drawings, there is illustrated an 1926. serial No. 108,965.

internal combustion engine, the crank case l of which vis fragmentarily illustrated, said crank case supporting a cylinder 2 upon the upper end of whichv the head 3 is mounted, the cylinder and head being pro-` vided with the usual water cooling jacket. The crankshaft 4 Vjournaled in the crank case 1 carries the connecting rod that is attached to the piston 6 that works in the cylinder 2 as shown in Fig. 3. The head 3 on the cylinder extends transversely of the upper end ofthe cylinder andis provided in the opposite ends respectively, withinlet yand exhaust openings 7 and 8 while provisionis made centrally of the upper side of the cylinder head to accommodatethe mounting of the spark plug 9. l

The cylinder 2 is provided with the usual bore 10 in which the piston 6 reciprocates,

vwhile the head 3 is provided with the usual explosion chamber 11, said'head being provided with inlet and exhaust valve controlled openingsv formed in partition walls spaced from opposite ends of the head forming outerinlet and exhaust chambers 12 v,and 13 as shown in Fig. 3. The partition wall 111 as shown in detail in Fig. 5. is in the form imy of an annular flangev projecting inwardlyv from said wall, said flangebeing vthreaded foi--reception of` the externally threaded valve seat ring'15, the operative face of which is of spherical formation as at 15a.

The valve associated with each ring seat 15 is in the form of asector of a sphere in which the convex spherical wall 16 is closed by the plane 17, the spherical wall 16 of the valve intimatelyengaging the spherical -face 16 of the valve ring 15, while the latter is adjustable in view of its threaded mounting to compensate for wear andthe like. The support for the valve includes a tubular shaft 18 journaled transversely of thecylinder head 3 inwardly of and adjacent to a partition wall 14 and a ring 19 secured to the t-ubular shaft carries bracket arms 2O attached to the plane wall 17 of the valve, this construction being clearly shown in Figs. 5 and 6.

The operating means for the valveV is shown more clearly in Figs. 1 and 2 wherein the cams'21 upon the cam shafts 22 engage roller bearings at the lower ends ofy the valve lifter rods 23, said rods 23 being similarly `formed bores in the bearings 24:

and 25 which prevent rotation of said lifting rods. A. bracket 23 carries a pair of

arms

27 and 28 that are secured to the valve lifting rod 23 at points between the bearings 2st and 25 while a coil spring 29 surrounds the valve lifting rod A3 between the bracket arm 27 andbearing 25 for normally forcing the valve lifting rod 23 in a downward direction into constant engagement with the cani 2l upon the shaft 22. A link 30 is pivotally mounted at its lower end as 3l upon 'the upper end of the bracket 2G with the upper end of said `link pivoted as at 32 toA one end of the lever that is securely attached to the adjacent projecting end of the tubular shaft 13 that supporto the valve. The valve operating mechanism for both the inlet and exhaust valves is identical as shown in Figs. l and P" forming the valve supporting shaft i3 tubular construction7 air is permitted to circulate therethrough for cooling purpr'isesg while, as shown in Fig. 3, the arc ate face 1G of the spherical valve may be provided with ventilating openings 311- for cooling the valve.

The operation of the engine is accomplished in the usual manner, the explosive charge entering the explosion chamber ll through the inlet port i', chamber l2 and through the valve controlled opening, the parts being positioned in Fig. 3 at the time of exhausting with the exhaustvalve open and the piston 6 at the lower'end of the cylinder ready to ascend to discharge or force the spent gas through the exhaust opening 8. The valves being in the form of sectors of spheres with the convex faces thereof working on spherical faces of valve ring seats, all hammering and unnecessary noises are eliminated in the operation of the valves and veffectively silent motor is produced. ln addition to the water cooling chamber surrounding the cylinder and head, air circulating through the hollow shaft supporting the valves effectively cools the same while said valve may be further cooled by providing ventilating openings in the convez; walls thereof.

ills shown in Fig. 7, the tubular valve supporting rod 13 is provided upon the inner face thereof with spaced longitudinally extending radiating [ins 18h which extend into the bore ofthe tubular shaft to aid in cooling the shaft.

@ther forms of valves and cooling means therefor are shown in lTigs. Sto 13, and as shown in 3 to ll, the tubular valve carrying shaft 35 vhaving a lateral opening 36 in the side wall thereof intermedi:=. te its ends that communicates with the hollow valve 37 that is in the form of a sector of a sphere. The connection between the valve 37 and the tubular shaft 3.) is shown in 'detail in llig. 9, the rear wall of the 'valve em- 1,aee,217

ris shown in Figs. 3 and 9, lthe casting i-l of internally threaded for the reception of the removable valve seat i2 with which the curved wall of the hollow valve'37 Acooperates while said valveseat is yeffectively cooled by contact with the inner wall of the water cnamber. Pipe sections extend between the cylinder and head, and the tubular valve carrying shaft as shown in Fig-3 each end of the shaft 35 carrying a nipple i3 extending outwardly of the shaft ends with a watertight bearing thereinyone nipple having a pipe connection lll with .the water cooling chamber of the cylinder 2 while the other nipple 43 has a pipe connection 45 with the water cooling chamber of the head 3. lt will 'therefore be seen that the cooling medium freely flows through the tubular shaft 35 that forms communication between the water chambers .of the cylinder and head, the cooling medium passing through the sidev opening 36 in the shaft 35 to enter ythe hollow valve 37 as will at once be evident from an inspection of Figs. 3 and 9.

' ln the form of the invention shown in Fig. 10, and intended only for the escape val-ve, air is caused to flow through the tubular valve shaft 35 while a diagonally disposed fin i6 extending from one side ofthe lateral shaft opening 36 dividesthe flow .of v air and causes part of the same to .enter the hollow valve .37' to be diffused by the T shaped abutment l? positioned within the hollow valve. The location of the fin 46 permits part of the air to pass vdirectly through the tubular shaft 35 while a sufficient quantity of air enters the 'hollow valve 37 to cool the same and escape through the opening in the middle of the spherical side -of the valve.

'houses a. T shaped abutment 47 having the leg thereof extending substantially completely .transversely of the Ytubular Kshaft to cause the 4entire body of .air to be `diverted into the hollow valve and escape at the opposite end of the shaft.

In the form of valve shown in Figs. 12 and 13, the cylinder head wall 2 has a removable valve seat Qset therein and with which valveseat the valve 50V is associated.` The valve 5() is in the form of a sector of a sphere and has a valve operating rod 51 eccentrically attached thereto and extending diagonally through the cylinder head wall 2 in the bearing 52 with the valve operating means associated with the outer projecting end thereof. In the several forms of valves disclosed, the operating means therefor is the same as illustrated in Figs. l andQ.

Vhile there are herein shown and described the preferred embodiments of the present invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and sco-pe of the invention as claimed.

What is claimed as new is l. In an internal combustion engine, an Oscillating Valve in the form of a sector'of a sphere that is rounded upon its operative side, a spherical valve seat cooperating with the convexed side of the valve anda support for the valve at the concave side thereof. I 2. In an internal combustion engine, a crank case, a cylinder carried by the crank case, ahead at the upper end of the cylinder, said head having inlet and exhaust ports, a tubular shaft journaled in said headadjan cent each port and a swingingly mounted valve on one side of each shaft cooperating with an adjacent port.

3. In a valve structure for internal combustion engines, a. tubular valve carrying shaft and a hollow valve in the form of a' sector of a sphere carried by one side of the tubular shaft and communicating therewith.

4. In a valve structure for internal combustion engines, a tubular valve carrying shaft and a hollow valvecarried by the tubular shaft and communicating therewith,

FREDERICK WILLIAM DUEWA. i