US2025177A - Motor compressor - Google Patents

Description

menadpeezaiess" UNITD STATES 11012011', COMPRESSOR Rani Pateras Pescara, Paris, France Maren 1, icas. serial No. 659,221

' In Germany March 1, 1932 10 Claims.

sizrokeofthepistons,andtoensureasmooth` working oi the engine a portion ofthe energy forthereturnofthepistonsisstoredintheform of com vair in cylinders distinct from the compression cylinders. so asto form compensat- 'Ihe chief object ot my invention is to provide mamotorcompremorofthattypewhichcanbe Itisknowxtostartmotorcomprcssorsofthat type by injecting air intothe compression cylindcrsthereof. Thismethodnecessitatesthatthe 25 eintheairreservoir should beatleastequaltothemaximumpressureinthe compression cylinders during the starting of the ,becauseiithatconditionwerenotiuliilled the aircornpinthe compression cylvoir,` thus considerablythe amount oi! airnforthestarting. e

driven toward each other so as to 'compress-the present-inthepowercylinderuptoahigh H thmheating'thatairtoa'temperature ignitingthefuel-thatisin-l mme, so Mimledillyaftertheis started,

ugproperisestablishedandmaintained.

inders would leak into the com air reser' A 1 gases contained in the power cylinders in order toproduceseli!ignitionoithefuael.'

accompanying drawing given merely by way of example, -f and in which: f

The gure is a longitudinal sectional view oi.' a motor compressor according to my invention.

As shown in the drawing, two opposed pistons f 5 Il and I2 move with a reciprocating motion o'n the'one hand both in power cylinder I3, and on the other hand each in air compression cylinders Il and i5 respectively. Said pistons are connected through mechanical means comprising connecting 10 rod 6 and a lever 8 oscillating about a spindle between two positions making between themselves an angle smaller than360. Piston' I2 controls, at one end of power cylinder I3, the ports 19,' and piston Il controls. at the other end 01215 said cylinder, inlet ports 2li for the scavenging air. 32 is a device for feeding fuel into the power Pistons Il and I2 carry, on the side of their compressing laces. inlet valves 2I, and during their outward stroke, they compress the air contained in chambers III and Il! of cylinders Il and i5, and discharge it through valves 23 into conduits 22. v

Onthe outer ends of the compression cylinders are xed stationary pistons 24 and -25 which engage cylinders 26 and 21 provided in the main pistons respectively. Said. inner cylinders 28 and 21 are connected, through conduit 28. provided with check valves. with a valve 2l adapted to be rapidlyopened and which can either shut oi! in a tluidtight manner, conduits 2l and 29; or bring j them into' communication withal compressed air reservoir through passage 2l.

When valve 2li is closed, the air contained in cylinders 28 and 21 is alternately com and. expanded while the machine is working.

When the pistons reach the end ot their'outwardstroire, the air present in cylinders 26and 21 is compressed same as the air which has remained inchambers III and lli of theaircompression cylinders, and pistons il and I2 are, pushed back toward their inner positions with such an energy as to suiiicientiy'compress the The function oi the air cushions isto storeinaknownway, a-pdrtottheencrgy necessary for the return stroke otthepistons.'

The-walls oi pistons Ii and i2' are provided with ports 25 and 2i respectively, whichconnect cylindersv 26 'and 21 with 'the atmosphere at the end of the inward stroke of pistons il and l2, through ports 21 and "respectively, provided in the air compression cylinders. Y ..55

' sure in which has a determined value.

'Ihe operation pf the device according to my invention is as follows:

Pistons Hand i2 are brought into the position shown in the drawing, that is to,.say to the end oftheir outward stroke. Valve 30, which is supposed to be, closed, communicates with a compressed air reservoir of a given volume the pres- Valve 30 is opened and the compressed air rushes into compensating air vcushion cylinders 26 and 21, and pushes the pistons backwards toward the middle part of cylinder I3 with such an energy that the air contained in that cylinder is compressed ancf reaches a high temperature. The fuel is then injected through 32, the ignition takes place, andthe pistons are then pushed outwardly by the combustion of said fuel. The air present in cylinders 26 and 21 is compressed and closes valves 33.

At the end of the outward stroke oi pistons Il and I 2, that is when the compressed air that has served to the starting of the engine has expanded in cylinders 26 and 21, these cylinders are brought into communication with the atmosphere through ports 35 and 36, so that theexcess of said airis allowed to escape to the atmosphere and the normal conditions of-workingof .the air cushions are established.

Furthermore, these ports :s and as campen-L.

sate, at the end of each outward stroke of the pistons, for, the valves 33.

While I have, in the above description disclosed what I deem to. be a preferred'embodiment of my invention, it should be well understood that I do not wish to be limited thereto as there might be changes made in the. ax'rzang".^ment, disposition and form of the parts without departing from the principle oi' my invention as comprehended within the scope of the appended claims.-

c What I claim is: I

1. A motor compressor comprising in combination a power cylinder, two compression cylinders, two pistons adapted to reciprocate on the one hand both in said power cylinder, and on the other hand each in one oi'. the compression cylinders respectively, a compensating air cushion cylinder provided in each of said pistons, a stationary pistonat the outer end of each com- .pression cylinder adapted to engage said lastl .-mentioned cylinder respectively, Aa compressed air reservoir, al conduit extending throughout each"of said stationary pistons, a check valve at the inner ,end of said conduit opening inwardly` intosaid compensating air cushion cylinder, a pipe connecting the outer end of each of said conduits to said reservoir and valve means for controlling simultaneously the iniiow of air from said reservoir into said pipes.

.2.'A motor compressor according to claim 1l further comprising mean-s forv connecting the compensating air cushion cylinders with the atmosphere at the end of the inward stroke of the first mentioned pistons..

3. A motor compressor according to Aclaim in which 1the compensating air cushion cylinders are provided with ports openingintoA the atmosleaks that may occur past phere and so located as to connect the last mentioned cylinders with the atmosphere at the end of the inward stroke of the rst mentioned pisof gas under pressure, means to connect said 16 source to said cylinder, and a check valve in ,said

connecting means to prevent the escape of gas therethrough from the vcylinder to said source.

5. In a device .as claimed in claim 4, said compression cylinder having openings therein con- 1.5.

nected to the atmosphere, said openings being l uncovered when the motor piston reaches compression position.

6. In a motor-compressonla motorcylinder, a motor piston slidable in said cylinder, a com- 20 pensating cylinder'and a compression piston one of vwhich is slidable with respect to the other,` means to introduce gas under pressure into said compensating cylinder, and means connecting' said pistons whereby relative separating move- 25,

ment between said compression piston and said compensating cylinder under the-pressure of the gas introduced into the compensating cylinder moves the motor piston to fuel compression position. .i 30 7. In a motor-compressor, a motor cylinder, a motor piston slidable in said cylinder, a compensating cylinder and a compression piston one of which is slidable with, respect to the other,

a reservoir oi gas underpressure, means to con- 35 nect said reservoir to said compensating cylinder,

a check valve in said connecting means to pre. vent the flow of gas from said compensating cylinder to said reservoir, and means connecting said pistons whereby relative separatingmove- 40 ment between said compression-piston and said compensating cylinderl under the pressurel of the gasintroduced into the compensating cylinder moves the motor piston tofuel compression posi- `iOl'l. 45 8. In a device asclaimed in claim-6, said com! pensating cylinder having means to connect it to the atmosphere when saidv compression piston and compression cylinder complete their relative separating movement. Y

9. In a motor-compressor having a motor piston, a compensating compression cylinder, pressure in'which tends. to move the motor piston in a direction to a position in which it compresses the 8.11'4 with which file l i8 t0 be burned, Source-51jl of gas under pressure, means to connect said source to said cylinder. l A f 10. In a motor-compressor having a motor piston, a'compensating compression cylinder pressure in which tends to move-the motor piston in 00 a direction to a position in which it compresses the-air withwhich fuel is to'be burned. a source of gas under `pressur e, me ans to connect said source to said cylinder, and means in saidconnecting means to prevent the escape of gas there- 35- throughyfrom the cylinder to said source.. VRAUL P A'I'ERAS

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