US1263337A - Air-cooled internal-combustion engine. - Google Patents

Description

0. E. MICHAUD. MR COOLED INTERNAL COMBUSTION ENGINE.

f APPLICATION FILED JUNE 24. 1916. 1,263,337.

Patented Apr. 16, 1918.

a g g u? w m QQQ a g e e 5% 5m \g Q g 5 esfg *s Q .m

O. E. MICHAUD. AIR COOLED INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JUNE 24,1916. 7 1,263,337. Patented Apr. 16, 1918.

3 SHEETS-SHEET 2.

R E Q; .1

0. E. MICHAUD. Am COOLED INTERNAL COMBUSTION ENGINE. 1

0O 1 man u M L4 m 3 m ow P APPLICATION FILED JUNE 24,1916. 1,963,337o

zr/llllljwlmlll/llll/lllllxllillillll/llll/x llllll a s'r-Ans ONESIME MICI-IAUD, OF ST. LOUIS, 'MISSOURI, ASSIGNOR 0F ONE-HALF T0 FRITZ V MULLER, OF M'OGEHEE, ARKANSAS.

AIR-CGOLED INTERNAL-COMBUSTION ENGINE.

Patented Apr. 16, 1918.

Application filed June 24, 1916. Serial N 0. 105,590.

To all whom it may concern:

Be it known that I, ONESIME E. MICHAUD, a citizen of the United States, and a resident of the city of 'St. Louis and State of Missouri, have invented a new and useful Improvement in Air-Cooled Internal-Combustion Engines, of which the following is a specification.

This invention relates to tour stroke eycle explosion engines having mechanically operated valves, and particularly concerns the valves, valve operating means, and the means for circulating air for cooling the valves and cylinders.

The objects of the invention "are simplicity and strength of construction, light weight, accessibility of operating parts, large area of valves and ports, and positive air circulation and cooling whereby little attention is required to operate the engine and keep it in good order.

The invention consists in the arrangement of the valves in chambers alongside of the cylinders and in the means for operating them without cams orrocker arms or other device's subject to 'derangementby expansion due to heat; also in meansfor supplying lubricant to the valves and for keeping the valves easy running and gas tight; also in the concentric inlet and "exhaust valve arrangement, whereby the hot exhaust gases are insulated from the moving surfaces of the valve; also in the double ported exhaust valves for diminishing the heat of the .exhaust gases discharged from the head end of the cylinder; also in the arrangement of fan and heat radiating fins for cooling the valves and cylinders; and also in the details of construction of the several parts as hereinafter described and set forth in the appended claims.

In the drawings, wherein the same figures designate like parts in the several views,

Figure 1 is a top plan view of an engine embodying the invention, the outside casing being removed from the fan and cylinders;

Fig. 2 is a part side elevation, and part longitudinal vertical section on the line 2-2 in Fig. 1 of the same;

Fig. 3 is an end view of the same looking at the left-hand end in Fig. 1, the cover for the timing gears being removed, and the outside casing around the cylinders being shown in cross-section;

Fig. 4 is a vertical cross-section of the same on the linel1 in Fig. '2; and

Fig. 5 is a horizontal cross-section of :a portion of the right-hand end of the engine shown in Fig. 1, on the line 5 5 in Fig. 2.

The engine shown in the drawings 'comprises four vertical cylinders 11 cast in pairs and arranged in a row. on the upper half 12 of the crank case. The crank-shalt 18 is horizontally disposed in bearings 14 in the lower side of the upper half 12 of the crank case, and is inclo'sed on the under side by the lower half 15 of the crank case.

The pistons 16 are connected to the cranks of the crank shaft by means of the connecting rods 17.

The inlet valves and exhaust valves are combined in double walled hollow cylinders 18 which are vertically disposed in a row one alongside of each of thelengine cylinders, and which taper on the exterior from top to bottom to lit in correspondingly tapered chambers 19 formed in enlargements of the side walls of the cylinders. The inlet valve portion surrounds the exhaust va lve portion, and consists of a port 20 in the outer wall of the valve which regi'sters with a valve port 21 in the side wall of the cylinder near its upper end. The port 20 communicates with the annular space between the .double Walls of the valve 18; and a second port 22 in the outer wall of the valve'18'near its lower end opens into the intake passage 28 in the side of the cylinder casting.

The exhaust valve is the inner portion of the valve 18, and communicates with the valve port 21 in the top of the cylinder by means of a passage 24 through the annular space occupied by the inlet valve alongside of the port 20. The lower end of the valve 18 has a port '25 in its side wall communieating with the exhaust space and registering with an exhaust port 26 in the lower end of the side wall of the cylinder. The

lower end of the valve 18 is open to the exhaust space, and leads to the exhaust passage 27 in the side of the cylinder casting.

There is one combined inlet and exhaust valve 18 for each of the four cylinders, and

the four valves are arranged in two set of two in each set. The upper ends of the valves 18 project out of the valve chambers and are provided with gears 28. Between each two valves of the forward and rear pairs of cylinders there is arranged a vertical valve operating shaft 29 carrying a gear 30 on its upper end which meshes with the gears 28 of the adjacent valves. The gears 28 have twice a many teeth as the gears 30, causing the valves to be rotated at one-half the speed of the vertical shafts 29. The vertical shafts 29 are rotated by miter gears 32 from a side shaft 31 which is parallel to the crank shaft and which is driven from the crank shaft by a train of gears 33. The side shaft 31 and vertical shafts 29 are driven at the same speed as the crank shaft.

The valves 18 are secured in place in the valve recesses by means of separate levers 34: which are arranged over the upper ends of the valves and are pivoted to brackets 35 bolted to the tops of the cylinders. The free ends of the valve holding levers 34 are held down by spiral springs 36. By unhooking the spring 36 from the end of its valve lever, the valve lever may be swung up away from its valve, and the valve removed for inspection.

The cylinders and valve chambers are provided with vertically disposed ribs 37, and are inclosed in a sheet metal casing'38 which extends down outside of the crank case and fit around the fan housing 39 below the crank case. The fan l0 is mounted upon a stud 41 below the crank case, and rotated from the side shaft 31 by means of a vertical shaft 42 and suitable gears. Miter gears 43 are shown for connecting the vertical shaft with the side shaft, and a spur gear 44 for connecting it with a gear 45 on the hub of the fan. The fan causes air to flow in a constant stream-between the ribs 37 on the cylinders and valve chambers for cooling them.

By the arrangement of the inlet passages in the valves surrounding the exhaust passages, the cool incoming charge tends to @cgaies er this patent may be obtained for cool the valve 18 and thereby help to maintain its fit in the tapered valve chambers. The valve springs 36 are on the outside of the cylinders away from the heated cylinder walls and valve passages where they can be kept at the proper tension. The concentric arrangement of inlet and exhaust valve passages enables a single moving valve to control both the admission and exhaust of gas to and from each cylinder, and cuts the chances of leakage past the valves in two.

The invention is not restricted to the particular details of construction shown ant described. I claim the following as my invention: 1. An air-cooled explosion engine having a horizontal crank shaft housed in a crank case, a plurality of vertical cylinders with valve chambers extending vertically alongside of them arranged above said crank case, vertical radiation fins on the side walls of the cylinders and valve chambers, a fan horizontally disposed beneath said crank case, a casing inclosing said cylinders and fins, said casing extending down around said crank case and fan, and means for retating said fan from said crank shaft, said means comprising a vertical shaft upon which said fan is mounted, and a driving connection comprising angle gearing between said vertical shaft and crank shaft.

2. An air-cooled explosion engine having a plurality of vertical cylinders with valve chambers, vertical radiation fins on the side walls of the cylinders and valve chambers, a fan horizontally disposed beneath said cylinders, acasing inclosing said cylinders and fins, said casing extending down around said fan, and means for rotating said fan from said crankshaft, said means comprising a vertical fan shaft, a side shaft connected to drive said vertical shaft, and angle gearing connecting said crank shaft and side shaft.

Signed at St. Louis, Missouri, this 22d day of June, 1916.

ONESIME E. MICHAUD.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

Images