US1178495A - Valve for internal-combustion engines. - Google Patents

Description

J. L. CLOUDSLEY,

VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR-811915,.

Patented Apr. 11, 1916.

v/g' Z 1 i a F I z]; x i -f" 0/ 20 3: 12 .v' f 51 I J I. f A i' @J J5 J L i lnvnwr Q No.6 UWJJAQQ g @QSRDNEALQaYNJY JOHN LESLIE GLOUDSLEY, OF LONDON, ENGLAND.

, VALVE For. mrnnnan-comnosrron ENGINES.

Specification of Letters Patent.

Patented Apr. 11, 1916.

i Application filed April 8, 1915. Serial No. 19,939. i

To all whom it may concern:

Be it known that I, Jonxf LESLIE CLoUns- LEY, a subject of the King'of England, residing in London, England, have invented certain new and useful, Improvements in Valves for Internal-Combustion Engines, ofwhich the followingis a specification.

This invention is for improvements in or relating to valves for internal combustionengines and has for its object to provide an improved construction of valve whereby both the gas andlhe air are controlled by separate throttles so as to insure the mixture being correct at all speeds and loads.

It will be understood that where gas is referred to in this specification, it may mean either true gas as used in a gas engine, atomized liquid fuel, or richly carbureted air.

The invention is applied to-engines having separate chambers or pumps from which air and gas are separately supplied to the working cylinder.

Thepresent invention therefore consists in the combination, in an internal combustion engine having separate gas and air inlets and a throttle valve on each inlet, with the valves of means whereby the variation in pressure produced in the conduit on the delivery side of one valve by hand or governor operation thereof, controls the movementof the other valve, for example in such a manner that the pressure on the deliveryside of the second valve becomes equal to that on the delivery side of the first valve.

In the preferred construction the air-valve is automatically cont-rolled by the variations in pressure in the passage .on the engine side of the gas-throttle. The means for effecting this may comprise a piston or diaphragm subjected differentially to the pressures in the passages on the engine slde, of the two valves respectively the piston or diaphragm may be arranged in a cylinder whereof one side is open to the passage on the engine side of the air-valve and the other end of the cylinder is connected by an open pipe to the engine side of the gas-throttle,

According to another feature of the 1nvention an auxiliary air-valve may be provided to admit air into the gas-pipe on the engine side of the gas-throttle, this valve be ing operatively connected to the gas-throttle in such a manner that it is open when the gas-thr ttle is closed'am'l vice versa. It will be appreciated that the opening or closing of this valve atfects the pressure in the construction gas pipe and this variation in pressure also has an effect on-th e mainair-valve. ,This arrangement 1s designed to provide in the manner hereinafter described for the-varia tion 1n the strength of the mixture of the combustible charge which is required under ordinary conditions; these. conditions are that when the engine is throttled down on light load, only a weak mixture is necessary, but when the gas-throttle is fully open and the engine is under load a stronger mixture 1s required.

Other features of the invention are hereinafter described and the novel details set forth inthe claims. a

The accompanying drawing shows in sectionalelevation a gas-valve and an airvalve for a two-cylinder engine, adapted to cooperate with one another in-the manner above described. It will beu'nderstood that the relative positions of these two valves will not necessarily "be the same as indicated for they will be situated at any convenient place on the engine. The construction illusengine governor to maintain the engine at a uniform speed.

The gas-throttle A is situated in the gasinlet-pipe A which communicates with two pipes'A A leading to each of the cylinders of a two-cylinder engine. The throttle A itself may take any convenient form; in the illustrated it comprises a slotted cylinder which is movable axially across the supply pipe A to present avariable aperture thereto and thereby control the quantity of gasfiowin'g through .it to the engine; or to the ump supplying the engine. From the pipe A on the engine-side of the throttle A, connection is made by a tube-.B to

a chamber C so that variations in'the prespressure in the chamber C. (that is to. .'a vtn the pressure in thetubeerhj) and on the the pressure of.

other side to the pressure .in the valve-chamber D and passages 'D, D (that is .to say, the main air supply on the engine. side of the valve controlling that supply) The valve D may be of any desired form and is illustrated as a sleeve secured on the rod C by a grub'screwC this sleeve moves across the-inlet aperture I) uncovering more 'or less of itas the piston C moves. I

, .While..the gas-throttle A may be controlled by hand, in the construction illustrated. it is controlled by an engine governor.

A lever E pivotedat E on a bracket secured to "the engine frame is operatively connected,

atone end, (not shown) to the governor gear.

1 and at the other end, by an adjustable tie rod E to the throttle, the arrangement be ing into the pipe A.

"deal-with only comparatively small throttle A butso as to be moved in the opposite direction; that is to say when the gasrod F to the lever throttle is moved toward its closing position. the l auxiliary air-valve G- 30- nected by a tierod F to a lever F I is moved toward its, open position. The throttle G is conpivoted at F and this lever is connected onthe opposite side of the pivot F iby an adj ustable'tie- It will be seen that when-the lever E moves. the valve A, it simultaneously rocksthe lever F and thereby moiresthe valve. Gr in-the opposite direction to. the movement of the valve A.

Thei control-hlitheengine is efi'ected by the valves hereinbeitore described in the following manner: If the. engine is running on load,

and. the load'is-removed'the speed rises and vthe governorgthereupon moves the gasdiminished pressure in throttle A toward its closing position. The hrottljng or the gas supply produces a the part A*' of the inletapipe' and this reduced pressure is communica'ted through the pipe B to the chamher. (1' of the air-controlling valve D. The

pressure on the'lower side of the piston C being reduced causes the piston tofall and move the main air-valve D downward across the air-inlet I) thus throttling the air supply... This movement continues until the throttling of the air supply is such that the lpres'surain the chamber 1) andpipes D D is the same as the The arrangement and adjustment of the parts are such that the throttling of the airsupply-is proportional to the throttling of that with-these parts only in operation a mixture of constant strength would be obtained. The auxillary' air-valve Gr however, which admits air to the gas pipe A is, as above mentioned, operated simulpressure 1n the chamber G.

, riva ries taneously with the gas-valve A. When,

'therefore, the gas-valve A is moved toward-- its-closing position the auxiliary air-valve G is opened and some air is admitted to the plpe A. This admission of air prevents the full reduction, of pressure,

'70 which would have been obtained by the throttling action of the valve A from being obtained and consequently the piston O and valve 1) are not moved to the full extent which they would have been consequent on the change in pressure of the gas alone. A proportionately greater quantity of air is thereby allowed to enter at the air-inlet D and this, together with the small quantity of air which enters past the valve G, gives a weaker mixture which is what is required when the engine is running light.

It will be seen that this invention makes use of the slight increase in the engine speed by'the action of the governor, to effect the change in the strength of the mixture which is desirable with load variations. The operation of these valves hasv been described for changes due to taking the load ofi the engine and it will be appreciated that the converse action of putting load on the engine causesa reduction in speed, and the operation of the valves is then such as to give a greaterquantity of a stronger mixture. l

This invention, it will be seen, provides a means for automatically controlling both the quantity of fuel supplied to the engine, and the richness of the mixture according to the conditions of load and speed under which the engine is running.

Variousmodifications may be made in the details of the invention'without departing from the spirit thereof; thus for. example, the arrangement above described may be reversed in 'so far as the primary control may be effected on the air-valve and the automaticcontrol on the gas-throttle. I The valves hereinbefore described are particularly suitable for use with a governor-controlled engine "but it 'will be appr eeiated' that they may also be usedwith a hand-controlled engine.

. What I claimas my invention and desire to'secure by Letters Patent is 1. In an internal combustion engine the combination of a gas-inlet, a throttle controlling said inlet, a separate air-inlet, an

air-valve controlling said inlet, a rod carrying mid air-valve and extending into a cy1- inder, a piston mounted on said rod and op- 18' ing one'end of sa erative in said cylinder, a conduit connect V cylinder to theair-inlet conduit on the de Very side of the air-valve and another conduit connecting the other end of said. cylinder to inlet on the delivery side of the gas-throttle substantially. as set forth.

3. In an internal combustion engine the combinatio'n of a gas-inlet, a throttle controllingsaid inlet, a separate air-inlet, an air-valve controlling said inlet, means controlled by the "ariations in pressure in the conduit on the delivery side of one of said valves, operativeto control movements of the other of saidvalves, an auxiliary airinlet communicating with the gas-inlet on the deliveryside of the gas-throttle and a valve controlling said auxiliaryair-inlet and operatively connected to the throttle. substantially as set forth.

the separate gas-' 4 In an internal combustion engine the combination of a gas-inlet, a' throttle controlling said inlet, a separate air-inlet, an rairrvfalve controlling said inlet and means subjected difl'erentially to the pressures in the conduits on the delivery side of the valves controlling said inlets, said means controlling one of said valves, an auxiliary air-inlet communicating with the gas-inlet on the delivery side of the gas-throttle and a valve controlling said auxiliary air-inlet and operatively connected to the throttle, v

substantially asset fort In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

J OHN LESLIE. CLOUDSLEY.

Vitnesses:

JOHN CAMERON RENNIE, H. D. JAMESON.

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