US1428412A - Internal-combustion engine - Google Patents

Description

A. W BEAUCHAMP AND E. C. DAVID SON.

INTERNAL COMBUSTION ENGINE. APPLICATION FILED 05c. 10. 1919. RENEWED JULY 25, 1922.

1,428,412. PatentedSept. 5, 1922.

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'izwefi/iors Al YBeau/chwm/p 1 1. Cllwvid/son Attorney A. w. BEAUCHAMP ANfi E. c. DAVIDSON.

INTERNAL COMBUSTION ENGINE. APPLICATION FILED 05c. l0. I919. RENEWED-Jumps. i922.

Patented Sept. 5, 1922.

3 SHEETS-SHEET 2 Inventors A.YY ..BBwu/CM P1 I]. Clkw Lei/sow Attorney A. W. BEAUCHAMP AND E. C. DAVIDSON.

INTERNAL COMBUSTION ENGINE. APPLICATION FILED'DEC- 10, 1919. RENEWEQJULY 25.1922. ,4120

PatentedSept. 5, 1922.

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Attorney Patented Sept. 5, 1922..

ttttlinffiiei a ARTHUR WILLIAM BEAUOHAMP AND nnGA-n CHURCHILL DAVIDSON, on SANDGAT'E,

1 1 QUEENSLAND, AUSTRALIA. i. I a I rivrn-nnnn-coivinusriotifnne rnn.

'Applioation filed Dceember 'io iaie, Serial no; 343,988. nen wea nu 25, 1922.: Serial l.\T0. 577,4 9.

ToaZZ iuhom it may concern l Be .it known that we, ARTHUR WILLIAM BEA CHAMP and EDGARGHUROHILL DAVID son, subjects of the King of b'rreat Britain,

residing at Sandgfate, in the State of Queensland, Commonwealth ofAustralia, have 1nvented certain new anduseful Improvements in Internal-Combustion Engines, for which We have filed an application in Australia,

datedNov. 13, @918, Serial'Number- 9264, and of which the following is a specification.

This invention relates "to improvements in internal combustion engines, the object be- -i ng toprovide an improved arrangement of and means for controlling and operating the valves also asuthe result of thisimproved arrangement an improved cylinder head or facilitated.

cover'wherein the construction is greatly simplified and by means' of which the dismantling or reconstruction of the engine is Other advantages will be here-e inafterset forth. I In carrying out our invention we fit the valves, which are spring, or otherwise, closed as desired'in the cylinder head or cover. They are controlled by one or more inclined or cam faces whic'h'operate on the stems (fitted withantifriction rollers if desired) of the valves and which are carried by or formed ongear wheels rotatable on the "outside of the cylinder head or cover. These gear Wheels mesh one with the other (or intermediate gear wheels may be provided between them) and they are driven from the main shaft by gearing or other suitable means. YThe ratio of gearing and the number of inclined/or. cam faces on the gear wheels are arranged to give the proper timing of the valves. The cylinder head or cover is made in the one casting, the inlet and exhaust manifolds and'passages being formed therein. The inletto'theinlet passage and the outlet from theexhaust passage coincide with openings in flanges on the cylinder casting, opposite which openings the fuel and. exhaust pipes that 'they are.

vided and suitably placedin cylinder casting and cylinder head or coverso as to obtain. a proper circulation. This arrangement of passages enables thecylinder head;

ing any of the pipes.-

or cover to be' removed without disturbgear wheels.

In order that the invention maybe-better understood we will .noW describe same with the accompanying drawings in In carrying out our invention We fit the inlet and exhaust valve A A in the cylin-j derhead orcover B. [These valves A A are carried by. the stems Cfwhich are in turn's'ec'ured at their upper ends to slides slidableyvlthin (as shown) or onthe outslde of, guides D. In some cases, we may use stems C only withoutthe slidesD. -The upper end of the slides D (or stems C when. such only -are' used)l' 'are fitted with antifr'iction rollers D ion-they may have rounded tops. i Suitable; means are pro vided orthe slides may beflso formed prevented from {turning round. The valves A, A which are spring closed {are operated by, one or more bevelled projections or cams E on the under side of each ofua number of spur wheels (E front elevation :)artl A" protecting cover isprovided overtheb These spur wheels E mesh one with the other (or'perha'ps, "in some cases we'may provide intermediate spur Wheels between them). The spurwheel's E .are driven'bythe pinion E sejcured on theverticalshaft F and mitre wheels GIG secured respecl tively on theshaft F andthe crank shaftH. We may, in'lieu of initrewheels Gr Gr use skew gear, a-worm' and worm wheel, .oriother fornir of drive, The, ratio between. the spur Wheel E and pinion E issay four to one,

and the gearing between the verticalshait F and, crankshaft H. is sayone to one.

The spur wheels E and attendant parts The cylinder cover or head B is made in the one casting, the inlet and outlet manifolds K K and passages L L being formed therein with a wall L between them, thus forming a hot spot manifold. The inlet to the inlet passage L and outlet from the exhaust passage L coincide with holes M in the flanges M M on the cylinder N. The inlet and exhaust pipes P P are secured to these flanges M M The water pipes leading to and from the water jackets Q are connected to the cylinder casting N at any suitable part and coincident openings Q suitably placed in the cylinder casting N and cylinder head or cover B provide for the proper circulation of the water. This arrangement of inlet and exhaust pipes L L water pipes and attendant parts permits of the cylinder head or cover being removed without disturbing any'of the pipes.

In constructing engines in accordance with this invention we do not wish to bind ourselves to the details shown in the drawings, for instance, the spur wheels E may be pivoted on the cylinder head or cover B instead of pivoted from the cover J.

Tn operation it will be seen that halfa revolution of the spur wheel E (with two cams E thereon) to two revolutions of the crank shaft Hv is equivalent to the present practice of one revolution of the cam shaft to two of the crank shaft H. The operation of our engine is otherwise much the same as those at present in use, sothat it is not necessary to enter into details. The following points may, however, be set forthas showing the advantages gained by our invention over engines at present on the market, and as indicating an improved operation.

1. Thespur wheels t with cam faces E operating the valves A A direct, dispense with the cam shaft, valve tappets, push rods and rockerarms with their respective guide bearings, etc, thus eliminating all lost motion between the camsand valves. This tends to make the valve operation more silent. 2. The valve operating gear, being driven at instead of engine speed, further tends to make the valve operation more silent. 3. The whole of the valve operating gear being situated in or on the cylinder head B the removal of one cover J exposes all working parts for inspection. l. All spur wheels E for operating valves A A are identical and the cam faces E on same being removable are cheaper to manufacture and easily replaced if worn, whereas the cam shaft in present use is expensive to manufacture and should, as sometimes happens, one cam face wear more than another, the whole cam shaft has to be renewed. 5. This arrangement of valves A A and cams E provides for a quicker opening and closing of the valves allowing them to remainfully open for about t; of their period preventing any tendency to wire drawing the gases. 6. The slides D on the valve stems C besides making an eflicient guide for the valves A A form dashpots which tend to prevent the valves A A bouncing. 7. Much simplified cylinder casting, no provision having to be made for timing gear cam shaftand valve tappets. 8. Although the cylinder head B is perhaps amore complicated casting than some at present used, this is more than compensated for by--(a) doing away with the separate inlet and exhaust manifolds K K and their fixings, (b) the before mentioned simplification of the cylinder casting N, (c)

a good hotspot L being formed between.

the exhaust and inlet manifolds K K enabling inferior fuels to be used, /d) more eflicient cooling of valve stems and spark plugs, (e) the cylinder head B being removable without interfering with the carbureter or the exhaust and water pipes. 9. Clean outline of engine with no moving parts exposed but all accessible. 10. A cheaper engine to manufacture. 11. A cheaper engine to maintain.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed we declare that what we claim is 1. In combination, cylinders provided at opposite sides with apertured flanges connected to an intake pipe and an exhaust pipe, a detachable head for said cylinders provided with a centrally disposed horizontal compartment divided longitudinally by a Wall into an inlet chamber and an'exhaust chamber which communicate with the interiors .of the cylinders, and pipes connected to said chambers and having horizontally disposed flanges detachably engaging the flanges of the cylinders. I

2. An internal combustion engine including a plurality of cylinders arranged side by side, a head casting adapted to cover the upper ends of both cylinders and provided with a plurality of T-shaped passageways, a dividing wall between said passageways extending in a plane intersecting. the axes of the cylinders, a valve port connecting each of said passageways with each of'said cylinders, reciprocable valves cooperatingwith said ports to admit an explosive charge to the cylindersand to discharge the exhaust gases from the cylinders, a plurality of meshing gear wheels mounted above said head and rotatable about axes Which are coaxial with the axes of the cylinders, cams provided on the undersides of said gear wheels and engageable with said valves for actuating the same, a crank shaft for the engine, and means connecting said crank shaft with one of said gear wheels for actuating said gear wheels from the crankshaft.

3. In an internal combination of the kind In testimony whereof We affix our signadefined by claim 2,' a cover plate mounted tures in thepresence of two Witnesses.

on the head, and stub shafts carried by said a a ARTHUR L A BEAUCHAMP- cover plate and functioning as axes for said I EDGAR CHURCHILL VI N 5 gear Wheels. WVitnesses:

Dated this tenth day of November, A. D. 'ELIZABETH MAXWELL AITGHISON,

1919. ALEXANDER ANDERSON.

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