US813959A

US813959A - Starting device for explosion-engines.

Info

Publication number: US813959A
Application number: US25521005A
Authority: US
Inventors: Victor Erdmenger
Original assignee: Krupp Stahl AG
Current assignee: Krupp Stahl AG; Fried Krupp AG
Priority date: 1905-04-12
Filing date: 1905-04-12
Publication date: 1906-02-27
Anticipated expiration: 1923-02-27

Description

No.813 ,959. PATENTED FEB. 27, 1906,

v. BRDMENGER;- STARTING DEVICE FOR EXPLOSION ENGINES.

APPLICATION I'ILED APB. 12,1905.

3 SHEETS-SHEET 2.

6 F 61 45/ r a 1 x /4 v w v 4- v -uI//// ///////A No. 313,959. PATENTED FEB. 27, 1906.

v. ERD'MENGER.

STARTING DEVICE FOR EXPLOSION ENGINES. I .L PPLIOATION TILED APB .12, 1905.

3 SHE-SHBET 3.

nmrsn STATES 'I'ZATENT OFFICE.

' VICTOR ERDMENGER, OF ESSEN-ON-THERUHR, GERMANY, ASSIGNOR TO FRIED. KRUPP AKTIENGESELLSCHAFT, or ESSEN-ONTHE-RUHR,

GERMANY.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Applioationfiledhpril12,1905. Seria1No.255.210. I

To all] whom, it may concern: I

Be it known that I, V'IoToR ERDMENGER, a 5 subject of the German Emperor, and a resi-. dent of Essen-on-the Ruhr,Germany, have invented certain new-find useful Improve' ments in Starting Devices for Explosion-En-I gines, of which the following is a specification.

. responds to one stroke of The present invention relates to a starting? device for double-acting four-cycle explosionengines, and in particular to the kind of starting devices in which compressed air is used for starting such explosion-engines. As commonly known, the working of such an engine dur' the explosion operation takes place according to. the diagrams Y Y (Shown in Figure 4 of the accompanying drawings.) The diagram Y relates to the front part of the cylinder, while the diagram Y relates to the rear part of the cylinder. The vertical lines I to IV indicate the limits of the four phases of the four-cycle operation. Each. of they phases I to II, II to III, and so on corthe working piston. In the diagram Y of the frdnt part of the cylinder' the explosion takes place at the point I. The phase I to II indicates the expansion, thehase II to III the exhaust, the phase III to IV the suction, and the phase IV to I the compression. The phases of the workin in the; rear art of the cylinder shown in the ia ram Y f0 low one another in the same order 0 succession; but, as a comparison of the two dia grams shows, the phases in the diagram Yilag one phase behind the phases in the diagram Y, so that in the diagram Y the moment of the explosion coincides with the point II,

I while the expansion takes place in the phase II to III, the exhaust in the phase III to IV,

the suction in the phase IV toI, and the compression in the phase I to II. The starting, too, has to take place in four phases in such a manner that compressed air is introduced into the cylinder parts in the phases in which explosion or expansion would take place if the operation was caused by explosion Thus the compressed air would in the present instance be introduced into the front part of the cylinder in the phase I to II and into the rear part of the cylinder in the phase II to III. According to the above remarks the working proceeding in the front and in the rear part of the cylinder when theen '11s is started takes place corresponding to t diagram X X.

her as by explosionoperation.

bodiment of the improved 1 (Shown in Fig. 4.) The introduction phase I to II of the starting diagram X for the front part of the cylinder is succeeded by exhaust in the phase II to III in the same man- The succeeding two phases III to IV and IV to I differ from the corresponding phases of the explosion operation in so far as there cannot be any suction and compression, because the gas and air pipes for the inlet-valve as used by explosion operation have to be closed during the starting. The suction phase and the compression phase are therefore in the starting replaced by a low pressure in the phase III to IV, which in the succeeding phase IV to I is again brought back to atmospheric pressure. The phases of the working diagram X of the rear part of the cylinder follow one another in the same order of succession as the exhaust-in the phase II to IV, the low pressure in the phase IV to I, and the return to atmospheric pressure in the phase I to II.

. In the accompanying drawings one emshown by way of example.

Fig. 1 is a diagrammatic view of the starting device and part of the working cylinder, partly in section. I ing to Fig. 1 with altered position of the slidevalve. Fig.3 is a view corresponding to Fig. 1 with still another position of the slidevalve. Fig. 4 is a diagrammaticillustration of the phases, as fully explained'above. Fig; .5 is a diagrammatic view showing the start V in device on a reduced scale and also the cylin er and the source of compressedair, and Fig. 6 shows a detail.

-A slide-valve A is arranged to slide in a cylindrical hollow space 1 of ahousing B, ar-

ranged on' the wor ing cylinder C, havin piston K. The up er and lower ends oi the valve A fit tightly the wall of the space 1 by means of packing-surfaces a 0. while the central part of the valve is reduced so as to form an annular space 2. The slide A is by means of a link D connected to one arm E of a controlling-rod E E, which is pivoted in a support I), projecting from the housing B. The other arm E of the controlling-rod'terminates in an eye member e in the perforastarting device is- Fig. 2 is a viewcorrespondof the engine in sucha manner that it during the operation may be coupled to either ofsaid parts, so as to either rotate with the shaft H or remain stationary. On the .drawings the controllingdisk G is divided into four quadrants I to II, II to III, III to IV, and IV to I. In the quadrants III to IV and IV to I the curved move 9 extends concentric with the control ing-shaft H, While in the quadrant I to II the curve is bent inwardly andin the uadrant II to III the curve is bent outwardly.

Passages

3, 4, and 5 provide for communi-.

cation between the annular space 2 and

annu lar chambers

6, 7, and 8. The annular chamber 6 communicates with the perforation of a projection b, to which is secured the conduit J for the compressed air. The annular chamber 7 communicates with the front art of the working cylinder through the me ium of channels 9 and c, and the annular chamber 8 communicates with the rear art of the working cylinder through'the me ium of channels 10 and c The controlling-shaft H is in the usual manner driven from the crank-shaft at the ratio of two to one, and each half-rotation of the crank-shaft or each stroke of the working. piston will therefore effect one-fourth of a rotation of the controlling-disk.

In Fig. 1, which illustrates the intermediate position of the valve A, the annular space 2 communicates with the conduit J for the compressed air. The flow from the compressedair source M may be regulated by means of a valve N. The

passages

4 and 5 are closed by the packingfaces a and a of the valve A, so as to prevent the com ressed air from passing from the space 2 to t e working cylinder. The valve A remains in the intermediate position for so lon a time as the roller F is in engagement with any point of the groove parts III to IV and IV to I that are concen tric with the controlling-shaft. When the controlling-disk G rotates with the control ling-shaft H in the direction of the arrow 2, Fig. 1, the roller F will enter into engagement with the part I to II of the curved groove. This causes the arm E of the controlling-lever to ascend while the arm E descends, and the valve A therefore moves downwardly. When the roller F reaches the most inwardlybent place of the curved groove, the valve assumes the position shown in Fig. 2, in which only the passages 5 are closed, while the assa es 3 and 4 communicate with one anot er t ough the annular space 2. Com- Y slide moves ressed air can therefore pass from the annuar space 2 through the passages 4 to the annular chamber 7, from where it passes through the channels 9 and c and a suitable valve (1 to the front part of the working cylinder. (Phase I to II of the diagram X By the further turning of the controlling-dis the valve A reverses its direction of movement and the face a closes the passages 4.

When the oint II of the groove reaches the roller F, t e valve reassumes the position shown in Fi 1, and when the outwardlybent part I to III reaches the roller the u Ward, thereby opening the passages 5. If the most outwardly-bent place of the curved groove has reached the roller F, the valve assumes the position shown in Fig. 3, in which the compressed air can pass by the

way

2, 5, 8, 1.0, and 0 d to to the rear art of the working cylinder. (Phase II to III of the diagram X In the further course of theturning of the controlling-disk the valve Aagain reverses its direction of movement and the face a closes the passages 5. From the oint III of the groove the valve reassumes t e intermediate position shown in Fig. 1 and remains in such po sition during one-half rotation of the con-- trolling-disk. of the diagrams X and X In the point I of the curved groove g the play starts over again. It will thus be seen that the introduction of compressed air into the front part of the cylinder takes place in phase I to II and that the compressed-air conduit is closed with re ard to the front art of the cylinder in phases II to III, III to V, and IV to I. The introduction of compressed air into the rear art of the cylinder takes place in phase II to III, and the compressed-air conduit is closed with re ard to the rear part of the cylinder in phases 'II to IV, IV to I, and I to II. The working proceeding after the closin of the compressed-air conduit in phases I I to III, III to IV, and IV to I with re ard to the front art of the c linder and in p ases III to IV, IV to I, and I to II with regard to the rear part of the cylinder must necessarily take place in the manner shown in the dia grams X X*, and it is therefore evident that an ex losion-engine provided with the improve starting device works as a four-cycle one.

When it is desired to start the engine, the grooved disk is con led. to the-controllingshaft. The fly-whee is then turned until the grooved disk assumes a position in which the roller F engages part I II of the disk, thereby causing compressed air to pass to the front part of the cylinder. From this moment the engine is driven automatically by means of the compressed air. To pass over to the explosion operation, the grooved disk is un coupled from the controlling-disk, which then turns in the disk without carrying the (Phases III to IV and IV to I I IIO same along'. The disk is thereiieon turned to and secured in a position which the roller F engages with any point ofthe part of oove g that is concentric with the con-.

the trolhn shaft, in which-"gositionfthe' com- {ijresse air is cutofi' byt e. .v'alve A,'liig. '1.

pon the opening of the gas' and' air conduit for the inlet-valve used for the explosion and 119011 making connection-for the sparking de- ;v1ce. the engine works with "explosion -op-' eration.

for connecting the means first named to the drivin member of the en in'e to be started, wherebwwhen the air is admitted to one end of the cylinder, the subsequent'movements follow automatically. .2. In combination with adouble-acting four-cycle explosiomengine and a suitable source ofcompressed air a valve movable to 39 open communication'for the compressed an" cessive strokes'of the en 7 --valve' .to the cut-ofi' osition duringthe two The foregoing with first one end of the cylinder and then the other end of the cylinder and then movable to a position to cut off said air-Suppl from both endsof the-cylinder, and a cam a apted to be driven-by'the engine, and constructed to impartjthe'two opening movements during suce and to move the following strokes of t e engne. combination wit 7 a double-acting fonrcycle explosion-engine," a suitable source of compresse'd air, passages leading to the re spective endsfofthe cylinder and a'valve constructed'to-assunie twoconsecutive positions whichopen communication successively with the respectiveends of the cylinder, andan intermediate position which cuts ofi commu nication with .both ends of the cylinder, a cam imparting the three movements to the valve during breaking connection between the cam and a driven member of the engine.

seldorf this 31st day of March, A. D. 1905.

' vroron ERDMENGER.

In presenceof- PETE LIEBER,.

WILLIAM Essnnwnm;

ifi'erent strokes of the engines movements, and means for making and specification signed at Diis