US1164504A - Multicylinder internal-combustion engine. - Google Patents

Description

aufm. MULTICYLINDER INTERNAL COMBUSTION ENGINE.

APPLICATION mso Aue. lo. 191|.

Patentd Da. M, 1915.

2 NHEETS-SHEET I.

1 l l Il I. .v .W )y lav GUMT. MULTlCYLI'NDER (INTERNAL CGWPBUSTION ENGINE.

APPucAnoN vman Aue. lo. 1911.-

]Patentd Dec. 14, 1915.

2 SHEETS-SHEET 2.

AND (GUR'ET, 01E PARS, FRANCE.

MULTCYLINDER INTERNAL-COMBUSTON ENGINE.

msnm

Specification of Letters latent.

Patented Der., lill, lnl..

Application tiled August `lll, 1911. .Serial No. 643,440.

.To all whom it 'may concern.'

Be' it known that il, Annan Gunner, engineer, a citizen of the Republicy of France, residing at 1 Rue Ficot, aris, France, have invented certain new and useful improven ments in Multicylinder internal-Combustion Engines, ot which the following is a specification.

This invention relates to :tour stroke cycle internal combustion engines with several cylinders, and distribution by such means as slide valves proper or dat valves, and, more particularly, sleeve valves or liners.

One ohiect of the invention is to enable the use in such engines, without necessitat ing a concurrent increase of the amount of clearances, the arrangement already specitied, while maintaining the usual arrangement of the connecting rods and of the re` spective pistons of the various cylinders of the said engines, and providing for each of the said cylinders only one slide valve without bringing about any premature uncovering of the ports, the slide valves used being arranged in a pair or pairs in such a manner that both the admission and exhaust of gases are controlled by the corresponding slide valves.v v

'lhe invention consists substantially in using in the engines of the class specified such mutual arrangement of the slide valves that the time each cylinder is controlled hy the noncorresponding slide' valves is regnlatcd by 'the corresponding slide valve; or, in a similar mutual arrangement of the said slide valves, and particular. association of the saine relatively to the corresponding respective pistons,- that the latter will contribute to the 'fulfilment of the function of the said slide valves.

The invention rfurther consists in the constructions and arrangements which will be understood from the following description and the accompanying drawings which illus# trate preferred structures embodying the inveution.

Figure 1 is a vertical-axial section on the line 1 1 ot Fig. 2 of a vertical two-cylinder engine embodying the features of 'the invention. Fig. 2 'is a vertical section on the line Q-Q of Fig. 1 or in a plane at right angles to that shown by the latter ligure. Figs. 3, il and 5 show respectively in horizontal cross section on the line 3-3 of Fig. 1, in similar section on the line fle-el of Fig. il, and in similar section on the line 5 5 of lTig. l, the saine engine. lIl ig. is a vertical section on the line 6-36, Figs. 3,14 and 5. Figs. 'l' and 8 are detail perspective views of the sleeve valves.

According to the features of the invention to which the drawings more particularly refer, and when it is desired to construct a vertical internal combustion two cylinder engine with four-stroke cycle and sleeve valves, the construction is as follows:

d and a? designate a pair of twin'cylinders which are made of such a here that it is possible to insert between them and the pistons l1 and b2 sleeve valves c and c2, and the whole is provided in the web a, which is common to the two cylinders, with a pair of ports al and d2 passing through the said web and situated in one and the same horizontal plane. @ne of these `ports is located at the front of the web a and the other at the back of said part.

vIn the cylinders a and a2 two ports e and e2 are provided, one tor each of the cylinders, situated, like the ports al and d2 in the .same horizontal plane and extended toward the front by respective conduits f and f2, by means of which the said ports e and 2 are connected to a branch g arranged in such a manner that it can be utilized as a common or joint inlet branch.

ln those parts of the device which adjoin the said web a, arc provided two ports. h and h2, one for each of the cylinders, and situated in different horizontal planes, the port h being located adjacent to the rear portion and near the bottoml of the' cylinder e and extended 'toward the rear by a conduit i connected to'a branch li2 arranged in such manner that it can he utilized as an exhaust branch for the cylinder a?. The second port h2 is located at the front and near the top of the cylinder a2 extended toward the front by a conduit 1I connected to a branch j arranged in such a manner that it canf be utilized as an exhaust branch for the port cZ, and said sleeve is also provided with a recess Z2 in the lower portion of the outer surface which produces with the said web a of the cylinders a conduit m2 of such construction that when the upper edge of the said recess is at a higher level than that of the ports cZ and (Z2, it establishes communication between the second of the said ports and the conduit 2, Vand consequently the branch i2.

The sleeve valve c2 has a port 7a2 of such construction that it can be brought to coincide with the port e2 of the cylinder a2, and a port'Z3 such that it can be similarly brought to coincide with the port d2 and provided with a recess in the upper part of its outer surface which produces with the said web a of the cylinders a conduit m', and when the bottom edge of the said recess is at a lower level than that of the ports d and Z2 it establishes communication of the port eZ with the conduit z" and consequently with the branch j.

The sleeve valves c and c2 are introduced 4from the top after the removal of 6the re- .of 18()o relatively to each other. The valve,

v sleeves or liners c and c2 are connected in the same way, by means of the said sleeves n and n2 and connecting rods g and g2 to the cranks r and r2 of an additional crank shaft r having the said cranks thereof arranged at an angle of 90 relatively to each other, the crank shaft 1 being connected in and of course, as is obvious, in a substantially similar manner as regards the cylinder a2.

Assuming in the first place that the various movable parts are in the positions in which they are shown in Fig. G corresponding to the end of exhaust in the cylinder a in question, there will take place successively: First, there is an ascent of the liner c, and Awhen it arrives at the top of the stroke there is coincidence between its port -Za and port e', and communication between its port- Z and the port Z is cut olf; and when' a descent of the piston b takes place, a suction is set up through the conduit f into the branch g. rl`hen, and upon further .descent of the liner c, the coincidence between its port la and the porty e is broken, and communication between its port Z and the port cZ is not restablished; and also, such a continuation of the descent of the piston b that it arrives approximately at the moment of breaking of the said coincidence at the bottom of the stroke which corresponds to the end of the suction. Then, there occurs such a continuation of the descent of the liner cthat communication between its port Z and the port eZ is reestablished, and at the same time such movement of the liner c2 that the lower edge of its recess assisting informing the conduit m', which edge had been already made previously to pass the upper edge of the port UZ', should remain above the said upper edge of the port (Z, and also such a renewed rising of the piston b that it produces compression of the charge drawn in during the preceding stroke, which compression is rendered possible by the obturation effected by the liner 6".

Then, such a continuation of the various movements just referred to occurs that thev piston Zi first arrives at the position of ignition, Yand then atthe top of the stroke, the ports c and Z remaining at the same time disconnected, the former without any assistance from the port c and the latter being disconnected from the conduit m by the liner c2.

lhen, the liner c arrives at the bottom of the stroke and rises again, without this leading in practice to any particular result, either as regards the port 7c or the port Z', which both remain in the same state as that referred to in the preceding paragraph, and for the same reasons; and also the piston b descends again and is thus made to accomplish its working stroke. Then` the rising of the liner c continues so that communication is resablished between its port Z and the port al', and simultaneously such a shifting of the liner c2 occurs that the bottom edge of its recess contributmamut ing to the formation .of the conduit m moves below the upper edge of the said port d', thus establishing communication between the interior of the cylinder a and the said conduit m, and consequently the exhaust branch jv; also a continuation of the renewed descent of the piston Z/ is effected and a lead produced ,in the exhaust, the piston b thus being made -to colnplete its working stroke. Then, such a continuation of the various movements just referred to is produced that after having returned to the bottom of the stroke, the piston by rises again, producing exhaust, the port 7u remainingat the same time disconnected without any assistance from the port c, and the port l in communication, by means ofV the liner c2, with the conduit m. Finally, such a continuation of the renewed rising of the liner c is etl'ected that it passes at one side with the lower edge of its port l the upper edge of the port cl, and consequentlyshuts otf communication of the interior of the cylinder a. with the conduit m and at the other side coincides, as regards the upper edge of its port c, with the lower edge of the port' c.; and also such a continuation of the renewed rising of the .piston b is effected that it again arrives at the top of the stroke, the whole corresponding tothe return of the various movable parts to their initial position.

The particular method of construction above described makes 'it possible to insure a very great perfection of working. Still better results can, however, be obtained by adopting, as has been assumed to have been niade in the example illustrated in the drawings, in addition to the arrangements already described, such an arrangement, with regard to the choice of position of the ports to be lnade in the cylinders relatively to that which the respective pistons of the same cylinders occupy at the top of the stroke in the same, that the said pistons, as shown by I `ig. (5, themselves act as obturating devices, more particularly from the moment of the ignition to a certain point ot the working` stroke. In that way the said ports, or more particularly those of the sleeve \,'alves, are protected from contact with hot gases during the time when the gases in question have the highest temperatures, so that the ports in question are better protected, and, moreover, a kind of concentration of the force produced by the explosion on the piston is'olitained.

lt is obvious that the invention is by no means limited to those details of construction which have been more particularly described. but comprises, on the contrary, all modifications, namely those where, in view ot' its application to six-cylinder engines, the six cylinders to be used are formed into also having exhaust ports, a web between the cylinders having a pair of ports adapter to haveindividual communication with the like ports of the cylinders adjacent thereto, and sleeve valves movably mounted inthe cylinders also provided With ports and individually Vand simultaneously operable in such manner that each sleeve valve controls the inlet and exhaust of its cylinder and also one of the ports of the companion cylinder.

In a four-cycle multi-cylinder internal combustion engine, the combination of a pair of cylinders, a slide valve reciprocably mounted in each cylinder, a piston in each slide valve, the cylinders each having a port communicating with a common inlet branch, the cylinders also having exhaust ports` a web between the cylinders having a pair of ports to communicate with exhaust ports of the cylinders adjacent thereto, and means for operating the slide valve and piston of each cylinder in connected relation in such manner `that the piston covers the inlet and exhaust portsl of the said slide valve at the end of the compression stroke and at the beginning of the working stroke.

3, In a four-cycle multi-cylinder internal combustion engine, a pair of cylinders, each cylinder having an inlet port provided in the fwall thereof, acommon inlet branch communicating with said cylinder inlet ports, the cylinders also having exhaust ports, a web between the said cylinders provided with two horizontal ports, a slide valve reciprocating in each cylinder and each having an inlet port corresponding to the inlet port of its cylinder, the said slide valves also being each provided with an exhaust port individually corresponding-to one of the horizontal ports of the web and also provided with a'recess to correspond to the remaining horizontal port of the Web, a reciprocating piston in each slide valve, the web also having two exhaust conduits respectively above and below the said horizontal ports thereof to individually coperate with the respective recesses of the slide valves, and means for controlling the reciprocating motion of the slide valves whereby each of said valves control the inlet and eX- haust ports of its respective cylinder `and simultaneously controls the exhaust of another cylinder.

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4. In an engine of the character specified, its respective slide valve at the end of the the combination of a pair of Cylinders procompression stroke of said piston and at the vided 'with exhaust and inlet ports,`a slide beginning of the working stroke. valve reeiprocatingly mounted in each cyl- In testimony whereof I have hereunto set:

5 inder and having ports to control the ports my hand in presence of two subscribing wit- 15 of its respective cylinder, a piston in each nesses.

slide valve, and means for operating the ANDR GURET. slide valve and piston of each cylinder in Witnesses: Connected relation in such manner that the H. C. COKE,

10 piston covers the inlet and exhaust ports of PAUL BLUM.

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