US1313578A - Ihtejutai-combttstioir eitgikr - Google Patents

Description

J. H. P. BURCHETT.

INTERNAL COMBUSTION ENGiNE. APPLICATION FILED SEPT. 26. l9l 7. 313,578, Patented Aug. 19,1919.

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To all'cukom it may concern:

Beit known that 1,JOHN HILARY Prxn BURGHETT, Of 38 Mort-lake road, Kew Gardens, in the countyof Surrey, En land, have. invented certain newand useful Improvements in or Relating to Internal-Combustion Engines, of which the following is a specification.

This invention relates to internal combustion engines of the two stroke. ty e. The object of the invention is to provi e an im proved engine of this type.

A two stroke'internal combustion engine made in accordance with this invention comprises a power cylinder, a crank case, a compression cylinder of larger diameter than the power cylinder disposed between the power cylinder and the crank case, said compression cylinder being provided for the purpose of containi-n air or a mixture of air and fuel, which is subsequently forced into the power cylinder, a art thereofbeing at the same time utilized or admitting fuel into the power cylinder, and a piston, said pistonbeing provided at one end with a collar adapted to work with compression cylinder, while the other end works in the power cylinders, packing rings being provided' at each end. Said collar being provided for the purpose of forcing the air or mixture of air and fuel contained in the compression cylinder into the power cylinder,

" during the whole of the period in which the I piston is traveling toward the head of the cylinder. A sliding sleeve provided 'with anannular cavity .is disposed internally on the trunk of thefpiston between the two ends and ports are provided in the trunk of the piston which are covered and uncovered and connected together by the sliding sleeve. Said ports and annular cavity being provided for the purpose of leading the air or mixture of air and fuel contained in the compression c linder into the power cylinder during centa e of the instroke, the residueof air contained in the compression cylinder in the latter case being then utilized for admitting fuel into the power. cylinder toward the end of the 'instroke in a manner hereinafter described. Means are provided for moving the sleeve in relation to the piston.

The drawing filed herewith is a diagrammatic section of one form of engine made in accordance with this invention.

a is the power cylinder, 6 the compressi n either the whole, or a predetermined:per-J m'r nnnnn-comnus'rron ENGINE.

Specification of Letters Patent. Pat ented'Au g'. 19, 1919- Appl lcationflled September 26, 19 7. Serial No. 193.300.

cylinder, 0 the crank case. One end d of the piston works in the power cylinder a and the collar 6 on the other end works in the compression cylinder-1b. In the trunk f of the piston are disposed inlet ports 9 and 9' adapted to be covered and uncovered and connected by a sliding sleeve h. In the sleeve h is a channel It adapted toconnect the ports g and g. In the piston dis an annular passage d and ports d? adapted to connect the cylinder 6 to the cylinder a. On the sleeve h is a rack 7'. On the small end of the-connecting rod is is a toothed segment m which gears with the rack j. n is theexhaust port. 0 is a scavenging air port connecting with the crank case 0. In the crank case is disposed a non-return valve 1?.

The direction of rotation is indicated by the arrow. In the drawin the iston and sleeve are shown in the position t e would occupy on the power stroke with t e inlet port g open and the port g closed. In operation during the outstroke air or carbureted mixture is admitted from the crank case to the cylinder 1) through the port 9. Toward the end of the outstroke, the sleeve H is moved by means of the segment m and rack 1' so as to place the channel h in communication with the port 9, thereby closing this port to the crank case and placing it in coma port g and the anat uncovered by the pistonht'the end of the power stroke. Compressed air or carbu- .reted mixtureis at the same time admitted through the port 0 on the opposite side ot the cylinder for the purpose of assisting 1n the expulsion of the exhaust gases. A spring-pressed valve 8 is disposed between the chamber R and. the top'of the power cylinder a. a

In the form of engine shown in the drawing herewith, the port 9 is so arranged as to be closed by the walls of the power cylinder a p edetermined moment prior to the completion of the instroke, and the air thereby entrapped in' the compression cylinder is compression cylinder 12, and a chamber R adapted to receive fuel through the fuel inlet It A spring pressed valve S is disposed between the chamber R and the top of the power cylinder a. 'From the chamber R is a'duct or ducts 7' leading to jetsin the seating of the non-return spring pressed valve 8. From the chamber R is a pipe or channel t leading to the top of the compression cylinder bk In operation, the fuel is 'fed under high pressure to the chamber R and when ,the ports in the trunk piston are covered toward tlie end of the instroke by the walls of the-power cylinder,the'remainder of the air in the compression cylinder is forced through the pipe t, causing the non-return valve 8 to open and allow some fuel. to pass through the ducts r and jets into the power cylinder.

Regulation is effected either by. varying the pressure in the fuel reservoir or by closing more or less of the jets throughwhich the oil is forced, or the fuel may be in-.

jected by any other suitable arrangement dependingeither upon a direct oil pump or a high pressure oil reservoir with amechani- 'cally operated injection valve. Or for sufficiently volatile oils a carbureter may be employed disposed in such a'manner that the air drawn into the crank case through the non-return valve p must pass first through said carbureter.

It is evident that by suitably proportioning the relative diameters of the cylinders a and b and provided the clearance around the sleeve h and between the end a of the piston and the cylinder are reduced to a minimum, it wouldbe possible to squeeze into the cylinder a whatever quantity of new air or mixture might-be foundmost suitable and depending in any particular case upon whether efficiency of fuel consumption or power per unit weight of engine was the more important consideration.

What I claim as m invention and desire tosecure by Letters atent is Atwo stroke cycle internal combustion engine comprising a power cylinder, a crank case, a compression cylinder, oflar er diametcr than the power cylinder, disposed between the power cylinder and the crank case, said compression 0 linder bcing provided for the purpose. 0 remaking air or a mixture of air and fuel which is forced into the power cylinder and a part of which is utilized for forcing fuel into the power cylinder, a trunk piston workin in said cylinders, said piston being provided with packing rings at each end, one end working in the power cylinder and the other end being rovided with a collar adapted to workin t e compression cylinder, said collar being provided for the purpose of. forcin the air or mixture of air and fuel contains in the compression cylinder into the power cylinder, ports in said piston, a sleeve in Said piston, a channel in said sleeve adapted to connect the ports in said piston; S8 1d ports being provided to lead theliiirr contained in the compression cylind'ej'ato the power cylinder during the major Iliart of the' instroke, and means for moving the sleeve, in relation to said piston.

2. A two stroke cycle internal combustion engine comprising a power cylinder, a crank case,acompression cylinder, of larger diameter than, the power cylinder, disposed between the power cylinder aridthe crank case; said compression 0 linder being 'provided for the purpose 0 containing air or 'a mixture of air and fuel which is forced into the power cylinder, and a part utilized for forcing fuel into the power cylinder, a trunk piston working in said cylinders, said piston bein ,provided with packing rings at each on one end workin power cylinder and the. other end beln provided with a collar adapted to work mthe compression cylinders, said collars being provided for -the urpose of forcing the air or mixture of alr and fuel contained in the compression cylinder into the power cylinder ports in said piston, a sleeve in said piston, a channel in said sleeve adapted to connect the ports in said piston, said ports being provided to lead the air contained in the compression cylinder .to the power cylinder during the major part of the instroke, meansfor moving the sleeve in relation to the piston, fuel admission jets at the top of the power cylinder and means for injecting fuel throu h said jets.

3. A two stroke cyc e internal combustion engine comprising a power cylinder, a crank case, a' compression cylinder of larger'diameter than the power c linder disposed between the power cylin er and the crank case, said compression cylinder be ing provided for the purpose of containing air or a mixture of air and fuelwhich is forced into the power cylinder and a part utilized for forcing fuel into the power cylinder,\ a trunk piston working in said cylinders, 'saidpiston being provided with packing rings at each end, one end work- -1ng 1n the power cylinder and the other end being provided with a collar adapted to work in the compression cylinder, said c0llar being provided for the purpose of forcing the air or mixture of air and fuel con-. tained in the compression cylinder into the power cylinder ports in said piston, a sleeve in said piston, a channel in said. sleeve in the adapted to connect, the ports in said piston, said ports being provided to lead the air contained in the compression cylinder to the power cylinder during the major part of the instroke, means for moving the sleeve in. relation to said piston, a plug disposed in a cavity at the top of said power eylin der, said plug being provided with a eha1nher adapted to receive air and a chamber adapted to receive fuel, means for admitting fuel under pressure to said fuel cavity, a spring pressed non-return valve in said air chamber, ducts from said oil chamber to the seating of sald valve and a duct from said chamber to thetop of the"con1pression 16 cylinder.

In witness whereof, I have hereunto signed my name in the presence of two subscribing Witnesses.

lQHN HILARY PYNE BURCHETT.

Witnesses:

ALFRED B. CAMPBELL, REGINALD EATON ELLIS.

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