US1261530A - Internal-combustion engine. - Google Patents

Description

H. J. HICKEY.

INTERNAL COMBUSTION ENGINE.

Patented Apr. 2, 1918. 2 SHEETS-sum1 ffl/bric??? W. Q N R. P 7 d0 A n/u m o I 7 El w N m v M 3mm. :Vi c u DI DI A H. I. HICKEY.

|N1ERNAL comusrloN ENGINE.

APPLICATION FILED APR. 21 |917.

Patented Apr. 2, 1918.`

2 SHEETS-SHEET 2.

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HENRY J. HICKEY, OF FORT DODGE, IOWA.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Apr. 2, 1918.

Application filed April 27, 1917'. Serial No. 164,987.

To all jwhom it may concern:

Be it known` that I, HENRY J. HICKEY, a citizen of the United States, residing at Fort Dodge, in the county of Tebster and State of iowa, have invented new and useful Improveniente in internal -Combustion Engines, of which the following is a specification.

This invention relates to internal combustion engines, and particularly to the valve mechanism thereof.

The invention hereinafter described relates tothe same type of engine disclosed in my former Patent No. 1,171l,722, dated March 7, 1916, the object in view being to provide valves and operating means ltherefor of an improved and more reliable character, doing away with the relief port and auxiliary valve described in said patentl and employing in lieu thereof two piston valves in connection with each cylinder and combustion chamber, one valve taking care of the intake and the .other valve taking care of the exhaust.

n.- further object in view is to provide novel driving means for said valves whereby they are actuated from the crank shaft of the engine and capable of being timed in relation to each other as well as in relation to the crank shaft. This enables best results to be obtained as an accurate adjustment of the relative movements of the valves is of great importance in order to secure the highest efliciency,

lVth the above and other objects in view, the invention consists in the novel construction, combination and arrangement of parts, as herein described, illustrated and clanned.

ln the accompanying drawings Figure 1 is a section taken through the engine transversely of the crank shaft and diametrically of one of the cylinders, the opposite cylinder being shown in elevation.

Fig. 2 is a cross section through one of the cylinders taken in line with the ports affording communication between the combustion chamber and the valve chamber.

Fig. 3 is a longitudinal section through one of the valves.

Fig. 4.- is a vertical longitudinal section through the engine on the line P-4 of Fig. 1.

The engine in conjunction with which the improved valve mechanism is used is shown as of the V type, 1 designating the crank case, 2 the crank shaft, 3 the cylinders which are arranged in angularly disposed pairs as shown in Fig. 1, 1lthe connecting rods and 5 one of the pistons which reciprocates in the combustion chamber 6, 7 designating a spark plug arranged in the cylinder head, the cylinder being water `iacketed as shown at 8.

As shown in Fig. 2, each cylinder is formed with two valve chambers arranged preferably at the inner side thereof as indicated in Fig. 1, 9 designating the intake valve chamber and 10 the exhaust valve chamber. The chamber 9 communicates with the combustion chamber 6 by means of a port 11. A corresponding port 12 affords communica tion between the combustion chamber G and the exhaust chamber 10. 13 designates the intake port leading to the chamber 9 and 1li designates the exhaust port leading from the exhaust; chamber 10. The water jacket S extends not only around the cylinder wall proper but also around the walls o1 the inlet and exhaust valve chambers as clearly shown in said Fig. 2. This is an important feature in that it insures the proper cooling of the valves and prevents overheating thereof and consequent undue expansion and contraction of the valves and the walls of the valve chambers.

The inlet and exhaust valves are practically identical in construction, one of said valves being shown in section in Fig. 3. Each of said valves is in the form of a piston having an elongated skirt 15 and a closed head 16. The skirt of the piston is preferably internally ribbed or reinforced as indicated at 17 where the packing rings 1S are located, said reinforcements or ribs 17 providing for the formation of the grooves to receive the packing rings and rendering the piston valve as a whole comparatively light. A tubular port 19 extends diametrically through each valve, the inner end of Said port being arranged to move into and out of registration with the respective port 11 or 1Q leading` to the combustion chamber 8 while the outer end of the port 19 is adapted to simultaneously move into and out of registration with the respective port 13 or 14.

Each piston valve is coupled by an inr dividual connecting rod 2O to one of a pair of parallel rotary valve shafts 21 and 22. These shafts are journaled in the upper portion of the Crank case as clearly shown in Fig. l and said shafts have fast thereon sprocket wheels 23 and 9A around which passes a silent driving chain 25 which is actuated by a sprocket wheel 26 fast 03,1 the crank shaft 2. The sprocket wheels 23 and 24 which revolve in the same direction are twice the size of the sprocket Wheel 26 on the engine shaft so that the valve shafts 2l and 22'are driven at one-half of the speed of the crank shaft. rIhe result of this is that each of the pistons has one complete back and forth movement for tivo of such movements on the part of the piston 5 thus allowing for the four operations of a four cycle engine. The cranks of the valve shafts are of course arranged so as to actuate the respective inlet and exhaust valves to open `and close the corresponding` ports at the proper intervals. The sprocket Wheels and driving chain under the arrangement shown and described, provide for an accurate adjustment or timing` of the valve shafts and Vtherefore the valves, and their movements are governed by said valve shafts. The valves are selfcleaning, it being impossible for any carbon to accumulate around said valves and within the valve chambers. Overheating of the valves is prevented by the Water jacket arrangement and therefore perfect lubrication is practicable. Furthermore the valve mechanism as whole is noiseless, the valves and all parts associated therewith being Wholly inclosed within the crank case and the cylinder blocks.

l claim 1. In an internal combustion engine, a crank case, a crank shaft journaled therein, cylinder blocks arranged in V relation to each other and each embodying an inclined combustion Chamber and inlet and exhaust chambers'ivhich communicate with the combastion chamber through separate ports both located immediately adjacent to the cylinder head, reciprocatory pistons in said cylinders connected to said crank shaft, piston valves mounted to reciprocate in said inlet and exhaust valve chambers, parallel rotary valve shafts journaled within the crank case, connecting rods between said valve shafts and the piston valves, and driv ing means between the crank shaft and said valve shafts.

2. In an internal combustion engine, a crank case, a crank shaft j ourn'aled therein, cylinder blocks arranged in J relation to each other and each embodying an inclined combustion chamber at the outer and lower side of the block, and inlet and exhaust chambers at the inner side of the block, rcciprocatory pistons in said cylinders connected to said crank shaft, piston valves mounted to reciprocate in said inletand exhaust valve chambers and each provided with a through port, parallel rotary valve shafts journaled withinthe crank case above the crank shaft, connecting rods between said valve shafts andvpiston valves, sprocket wheels on said valve shafts, a sprocket wheel on the crank shaft, and a chain extending around said sprocket wheels for transmitting` motion from the crank shaft to the valve shafts.

In testimony whereof I aiiix my signature.

HENRY J. HICKEY.

Gopjes of this patent may be Obtained for five cents each, by addressing the Gnmmissoner of Patents,

. Washington, D. G.

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