US891638A - Water-injector for internal-combustion engines. - Google Patents

Description

N0.89l,63 8'. PATENTED JUNE 23, 1908.

I A. G. SOHOLES &- G. GIBSON. r

WATER INJECTOR FOR INTERNAL COMBUSTION ENGINES.

APPLICATION iILED JAN;1B. 1908.

vlfrpuss'sssy m vaN-rbas. .1 lJZhZawr 62510221 Mr a! t '1 UNITED STATES PATENT OFFICE.

ALFRED GEORGE SOHOLES, OF ILFOR D, AND GEORGE GIBSON, OF WESTMINSTER,

ENGLAND.

WATER- INJECTOR FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented June 23, 1908.

Application filed. January 18, 1908. Serial No. 411,539.

To all whom it may concern:

Be it known that we, ALFRED GEORGE SCHOLES, engineer, a subject of the King of Great Britain and Ireland, residin at 41 Gordon road, Ilford, in the county 0 Essex, England, and GEORGE GrBsoN, engineer, a subject of the King-of Great Britain and Irelan residing at 25 New street, in the city and county of Westminster, England, have invented a new and useful Improvement in Water-Injectors for Internal-Combustion Engines, of which the following is a full and com lete specification.

. Tl iis invention relates to that type of water injector for internal combustion engines consisting of a small direct-acting pump the piston of which receives motion for its Working stroke from the explosive effort in the working cylinder of the engine so that the water is injected into the cylinder immediately after the commencement of the work- ,ing stroke of the engine, and it consists essentially in making the delivery port in the cylinder of the ump as near to its open end as possible so t at said port iscloser by the iston operating the pump when said piston s at the end of its return stroke, the object being to prevent the waterreniaining in the delivery port or assage being sucked into the working cylinder of the engine during the suction stroke of the piston thereof which is an inherent fault in water injectors of this type, which fault is generally intensified by reason of the length of the delivery port or passage. It has been suggested that this defect can be remedied by the use of a nonreturn valve at the end of the delivery port or assage but the heat is so intense that suc 1 a valve will not work reliably in such a position.

The invention also consists in certain de tails of construction hereinafter specified which have for their objects enabling the direction in which the water is injected into the cylinder to be varied as desired, to simliiy the construction, and to increase the its oi the working parts more particularly the spring employed for effecting the return stroke of the working piston.

In the accompanying drawing, l ignrc l is a view in sectional elevation, and Fig. 2 is a view in plan with top of casing removed.

In both views similar parts are marked with like letters of reference.

The apparatus consists essentially of a cylinder a, open at one end, a piston b working in said cylinder, an extension b of said piston forming a ram which works in a second cylinder 0, a spring (1 acting on the piston b to effect its return stroke, an inlet port or passage e leading into the head of the cylinder 0 fitted with a non-return valve e, an outlet port or assage 1' leading from said cylinder 0 fitter with a non-return valve f, the said outlet terminating in the cylinder 1 at or near the open end thereof in such a position that it is closed by the iston b when it is at the end of its return stro e at the open end of said cylinder.

In the preferred construction which is that illustrated in the accompanying drawing the spring (I is located outside the cylinders in order that the high temperature of the iston b may not be imparted to it in order t at its temper may not be impaired. The spring acts on the-'pistonb through an extension b of the ram b (which projects through the head of the cylinder 0) through a collar g) screwed or. otherwise fixed on said extension and operates against the up er end of a cap l1 screwed or otherwise fixer to the cylinder -hcad. 'lhc cylinders and the valve boxes are preferably formed in one iecc as shown, a suitable packing c and pac ring ring w being em )loycd between the two cylinders and a suitalile packing r and packing ring 10 being employed where the extension If )asscs through thc cylinder head. The valve ioxes are preferably inclosed in a casing It which is r I constructed and arranged to operate as a water jacket in which construction the inlet port 0 opens into said chamber and said chamber is provided with an inlet e for the supply of water. The o on end of the cylinder (1 is partially closer by a ring Z which operates as a stop for the piston to bear against. The strength of the spring d issuch that the pressure on the piston 6 during the coinprcssion stroke of thc cuginc will not lift said piston and will thcrcfore not cause the injector to function. In the cylinder 0 is a small hole a. the function of which is to preconvenient place for the working K the combustion chamber The cylinder a is threaded externally or otherwise ada ted to be fixed in the wall of the cylinder 0 the motor so that it is open to thereof. In an engine such as is used in motor road vehicles a insertion of the a paratus would be one of the holes above the valves which are usually closed by screw plugs. I

To enable the jet of water produced by the a paratus to be directed in any direction- W 'ch is especially useful in applying the apparatus to the engines of motor road vehiclesthe outlet of the delivery port or passage f leads into an annular channel at the open end, of the cylinder 11. This channel is conveniently formed by a ring n having a groove n in one of its faces being fitted in a recess in the 0 en end of the cylinder (1 and kept in place t erein by the ring Z. The inner edge of the ring a is provided with one or more holes 0 communicating with the annular'groove or channel a so that by rotatin the ring a the said hole or holes maybe place in any desired position in the circumference of, the cylindere.

What we claim, and desire to secure by Letters Patent is 1. An apparatus for injecting water into the cylinder of an internal combustion engine operated by the force of the explosion in said cylinder, comprising a cylinder open to the cylinder of the engine, a piston working in said cylinder, a small force pump thcram of which is operated by said piston, suction and deliver ports for the pump fitted with non-rcturn valves, the outlet of the delivery port terminating in the cylinder of the apparatus at or'near the open end thereof so that said outlet is closed by the piston of the apparatus when said piston is at the end. of its stroke at the open end 01 the said cylinder, as set forth.

2. In an ap aratus for injecting water into the cylinder 0 anin'tcrnal combustion engine, the combination of an open-ended cylinder in connection with the cylinder of the motor, a piston working in said cylinder, a spring pressing the piston towards the open end of said cylinder the strength of the spring being such that the piston will not be moved during the compression stroke of the engine, a rain operated by said piston, a pump cylinder in which said ram works, an inlet or suction port or passage for said pump cylinder, a non-return valve in said suction port or passage, a delivery port or passage leading from the pump cylinder into the cylinder of the apparatus in'sueh a'position that the outlet 0 said port or iassage is closed byv the piston whenit'is at the end of its return stroke in said cylinder, and a non-return valve in said delivery port or'passage, as set forth.

3. In an ap aratus for injecting water into the cylinder of an internal combustion engine, the combination of an men-ended cylinder in connection with the cylinder of the motor, a piston working in said cylinder, a spring operating to press the piston towards the open end of the cylinder and retain it in said position at all times except during the workmg stroke of the engine, an annular ring in the open end of the cylinder for retaining the piston in said cylinder, a ram operated by said piston, a pump cylinder in which said ram works, an inlet or suction port or passage for said pump cylinder, a non-return valve in said suction port or passage, a delivery port or passage leading from the pump cylinder into the cylinder of the apparatus in such a position that the outlet of said port or passage is closed by the piston when it is at the end of its return stroke in said cylinder, and a non-return valve in said delivery port or passage, as set forth.

4. In an ap )aratus for injecting water into the cylinder 0 an internal combustion engine, thee" ombination of an o en-ended cylinder in connection with the cy inder of the motor, a piston working in said cylinder, a spring operating to press the piston towards the open end of the cylinder and retain it in said position at all times except during the workmg stroke of the engine, the said spring being located outside the cylinders, an annular ring in the open end of the cylinder for retaining the piston in said cylinder, a ram operated by said piston, a pump cylinder in which said ram works, packing between the two cylinders, an inlet or suction port or passage for said pump cylinder, a nonreturn valve in said suction port or passage, a delivery port or passage leading from the pump cylinder into the cylinder of the apparatus in such a position that the outlet of said port or passage is closed by the piston when it is at the end of its return stroke in said cylinder,

and a non-return valve in said delivery port or passage,-as set forth.

5. in an apparatus i or injecting water into the cylinder ol an internal combustion engine, the combination of an o en-ended cylinder in connection with the ey inder oi the motor, a piston working in said cylinder, a spring located outside said cylinders and. operating to press the piston towards the open end of cylinder and retain it in said position at all times except during the working stroke of the engine, an annular ring in the open end of the cylinder for retaining the plston in said cylinder, a ram operated by said piston, a pump cylinder in which said ram works, an inlet or suction port or passage for said pump cylinder, a non-return"valve in said suction port or passage, a delivery port or passage leading from the pump cylinder irrto the cylinder of the apparatus in such a signed our names in the presence of two subposition that the outlet of said port or passcribing Witnesses. sage is closed by the piston when it is at the ALFRED GEORGE SCHGLES. end of 1ts return stroke 111 sald cylinder a 5 non-return valve in said delivery port or GEORGE GIBSON passage, and a Water jacket surrounding the VJitnesses: cylinders and valve boxes, as set forth. A. MILLWARD FLAOK,

In testimony whereof We have hereunto G. V. SYMEs.

Images