US2656826A

US2656826A - Exhaust valve cooling assembly

Info

Publication number: US2656826A
Application number: US312371A
Authority: US
Inventors: Charles W Galuska
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-09-30
Filing date: 1952-09-30
Publication date: 1953-10-27
Anticipated expiration: 1970-10-27

Description

Oct. 27, 1953 C. W. GALUSKA EXHAUST VALVE COOLING ASSEMBLY Filed Sept. 30, 1952 Fig. 2-

Charles W. Gall/ska mmvroa BY Wang; 8%

Patented Get. 27, 1953 EXHAUST VALVE COOLING ASSEMBLY Charles W. Galuska, Burbank, Calif., assignor of fifty per cent to Lois Edwards, Burbank, Calif.

Application September 30, 1952, Serial No. 312,371 4 Claims. (Cl. 123-4117) This invention comprises novel and useful improvements in an exhaust valve cooling assembly and more specifically pertains to a device for supplying a cooling fluid to the undersurface of the exhaust valve and to the exhaust valve port and exhaust passages of an internal combustion engine during that period when the exhaust valve is in its closed position.

The primary object of this invention is to provide a cooling system whereby a cooling fluid may be supplied to the undersurface of an exhaust Valve when the latter is closed and whereby the cooling fluid passage is closed from communication with the exhaust valve port when the exhaust valve is in its open position.

A further object of the invention is to provide a cooling assembly in accordance with the preceding objects wherein a valve controlling the flow of coolant is operated in synchronization with and is operated automatically by the movement of the engine exhaust valve.

These, together with various and selected features and objects of the invention, which will later become apparent as the following description proceeds, are attained by the present invention, a preferred embodiment of which has been illustrated, by way of example only, in the accompanying drawings, wherein:

Figure 1 is a fragmentary vertical sectional view through a portion of the cylinder of an internal combustion engine showing the exhaust valve assembly of the same and showing the cooling device in accordance with this invention applied thereto, the exhaust valve being shown in its closed position and the coolant valve being open to permit flow of the cooling fluid into the exhaust port, against the undersurface of the exhaust valve and into the exhaust passage of the engine;

Figure 2 is a view similar to Figure 1 but showing the position of the parts when the exhaust valve is open, the coolant valve being closed;

Figure 3 is an enlarged detail view of the coolant valve assembly of the invention.

Referring now more specifically to the accompanying drawings, where like numerals designate similar parts throughout the various views, it will be seen that numeral m designates generally a cylinder of an internal combustion engine having an exhaust passage [2 with an exhaust port It therein controlled by an exhaust valve it of conventional design.

In accordance with this invention there is provided a conduit 18 for a cooling fluid which conduit communicates with the exhaust port I4.

2 As illustrated, the conduit I8 extends through the cylinder head 20 of the engine and is connected. by a tube 22 with any suitable source of coolantv fluid under pressure, as for example, compressed air, liquid or any other gaseous or liquid fluid.

Referring now especially to Figure 3, it will be seen that the coolant conduit I8 is provided with a valve seat 22 which may be in the form of a conical member whose base is screw-threadedly engaged as at 24, with the internal walls of the coolant conduit, and which member is provided with suitable preparations. A coolant control valve 28, which may be of the poppet valve character and. is provided with a conical head at cooperating with the conical seat in the member 22, is provided. This valve has a guide stem 32 and an actuating valve stem 34. The former extends through a guide bore 36 in a uide member 38 which is externally threaded as at in for engagement in the coolant conduit I8. Suitable passages or apertures 42, extending through the guide member 38, permit the flow of the coolant fluid past the guide member. The stem 32 of the valve extends through the bore 36 whereby the coolant valve is guided for reciprocatory movement in the coolant conduit. A compression spring 44 surrounds the valve stem 32 and is disposed between the valve head 28 and the guide member 38 to yieldingly urge the valve into a coolant port closing position, as shown in Figure 3, whereby the valve head 30 will close the apertures 26 and prevent passage of coolant fluid into the exhaust port I4.

The apex of the conical member 22 is provided with an apertured bore 46 through which extends and is guided the operating stem 34. The latter extends down into the exhaust port l4 and into position to be engaged by the undersurface of the valve head 16 of the exhaust valve when the latter is at or approaches its closed position. The adjustment of the parts is such that, when the exhaust valve is closed, as shown in Figure 1, the undersurface of the exhaust valve head It will engage the stem 34 and lift coolantvalve 23 from its seat whereby coolant fluid under pressure will flow through the conduit [8, through the exhaust port l4, will cool the undersurface of the closed exhaust valve, as well as the valve passage l2, and will be discharged into the exhaust system of the engine. When, however, the exhaust valve is open, as shown in Figure 2, the movement of the exhaust valve away from its seat will also disengage the same from the end of the valve stem 34, whereby the spring 44 as well as the pressure prevailing in the coolant conduit l 8 will seat the coolant valve and prevent flow of coolant fluid as well as flow of gases from within the cylinder l into the coolant conduit.

By this arrangement it is seen that coolant fluid is automatically supplied under pressure for cooling the exhaust valve of an internal combustion engine when the latter is on its seat. Effective cooling is thus provided for any wasteful flow ot. coolant. is. avoided.

From .the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous'modiflcations' and changes will readily occur to. those skilledin the art, it is not desired to limit the. invention to: the exact construction shown and described, and accordingly all suitable modifications" and equivalents may be resorted to, falling withinlthe-scopeof the appended claims.

Having. described. the invention, what-is claimed as new. is:

L, A cooling. system for the exhaust valve. of an internal combustion. comprising a conduit con nected toa. sourceof. cooling. fluid and to the exhaust portv of? an. internal combustion engine, valve means. controlling flow through said. con.- duit,,means.for synchronizing; movement. of said. valve means. to. movement of. said. exhaust. valve whereby cooling, fluid isadmitted to said exhaust valve portwhen the: exhaust valve is closed, said, lastmeans being, actuated-b the head of the ex? haust. valve.

2. A. cooling systemcfor theexhaust valve of aninternalv combustion. comprising, a conduit con nected toasource oi cooling- .fluid-andio the ex-- haust port oiv an internal combustion engine,.

valve means controlling flowthrough said con.- duit means-iQr synchronizing movement of said valve-meansto movement of said exhaust valve whereby cooling fluid-is admitted to said exhaust valve port when the exhaustvalve is closed, said r 4 last means comprising a stem on said valve means extending into said exhaust port and engageable by said exhaust valve in the closed position of the latter.

3. A cooling system for the exhaust valve of an internal combustion comprising a conduit con nected to a source of cooling fluid and to the exhaust port of an internal combustion engine, valve means controlling flow through said conduit. means; for synchronizing movement of said valve means to movement of said exhaust Valve whereby cooling fluid is admitted to said exhaust valve port when the exhaust valve is closed, said valve means including a normally closed poppet valvehaving a stem said stem extending into said exhaustport andbeing engaged by said exhaust valve ,for opening the poppet valve when the exhaust valve is" closed.

4; A cooling system for the exhaust valve of an in temal combustion comprising a conduit connected to. a source of cooling fluid and to the exhaust port of an internal combustion engine, valve means controlling flow through said conduit, means for synchronizing movement of said valve means to movement of said exhaust valve whereby eoolingfluid is admitted to said exhaust valvepont. when the exhaust valve is closed, said valve means including a normally closed poppet valve havinga stem, said stem extendinginto said exhaust port. and being engaged by said exhaust valvefor opening the poppet valve when the exhaust. valve is closed, av spring. in said conduit urging. saicl' poppet. valve. to closed position.

CHARLES W. GALUSKA.

References Cited in the fileof this patent UNITED STATES PATENTS Number Name- Date l,87'3',1-'-19' Griswold Aug. 23, 193-2- 2',065,106 Symons Dec. 22, 1936 2,175,261 Harbaugh Oct. 10, 1939'-