US1131387A - Starting mechanism for high-compression engines. - Google Patents

Description

B. KRMER.

ESGINES.

STARTING MEGEANISM YFR HGH GOMPMESIG 102 FILED ACG. 1m 1L- Patentfed Mar.9, 1915.

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inventor- Bernhard K1 Moana H i5 qttor'rzg.

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bis @Ll/L B. STARTING MESH/MSM PGR HIGH CBPRESSIDN ENG'LNBS.

Patented Mar. 9, 1915,

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Lav. s. v l and l@ indicates me, casing vf thv fstmng vnms n.mhz'xlxsni. 3v if; pravidc lwith a passgs that municates by the pipe Q0 with the starting tank- 19. and also with a passage Q0 that communicates by thepipe 23 with the air blast tank '22. Situated in the passage Q9 is a cheek valve 30 that moves in response to .fluid under pressure and also in response to the pressure of the coiled compres sion spring: 31. lts function is to cut otl' the blast air when the air starting mechanism is in operation. Below the valve is a vertical passage 32 which terminates at its lower end in a transverse passage 33 commnnicating` with the pulverizer 15. Thli passage is shown in dotted lines Figs. 3 and 4. It is to be understood that blast air for the other working cylinders passes thereto and is controlled by any suitable means. The upper end of the spring 3l is seated in an adjustable hollow nut or plug 34 which is provided with lateral ports at its lower end opening into the chamber 35. This chamber is connected by a passage 36, shoavn in dotted lines. with a controlling valve to be described later. The chamber and passage carry ofi leakage air from above the valve.- The plug 34 is provided with a screw threaded cap that prevents the escape of air through the hole in the top thereof, which hole is arranged to receive a wrench Located in the right hand side of the casinar is a controlling valve means comprising valves 37 and 38 which are mounted on the same stem; each valve being provided with its own seat. The upper seat is formfd on the upper end of tln1 fixed sleeve 39 and the lower-one on the upper end of the sliding tube 404 which ,also forms an actuatorl to open the upper valve 37. ln the sleeve 39 are radialports communicating with the annular chamber 41. the latter openingr into the passage 36 leadingr ,to the check valve. The tube/i0 is provided with an escape Qr vent port 42 lnear its lower end and also with a plug 43, the latter engag' 1,11 the lower abutment of the compression spring 44. The abutment is made in the form of a tubular guide which is forked to receive the roller 45. nThe casing is vented above lthe guide to permit the escape of'air from theQ tube. The upper v alve 37 is normally held closed by the compression spring 4G contained in a suitable hollow plug. .As shown the valve 37 is open and the valve 38 closed. This means that air under pressure can flow from the supply passage 29 and small passaire 47 past the valve 37 into the sleeve 39 and through its ports into the chamber 41 and passage 36 to the upper side of the check valve 30 in the path of the blast nir. As soon as this happens the fluid' pressures on opposite sides ol said valve are eoualized and the spring 3i closes it and therefore the blast air cannot [low from the tank 22, pipe Q3 and passage Q9 to the pulverizers. The advantage in cutting oi the supply of I58 which drives one blast air at this point resides in the fact,

that it then becomes unnecessary to modify in any way the action of the needle valve of the pulvcrizer or its actuating mechanism; in other words cut it out of service. This results in a material mechanical simplification besides decreasing the original cost and that ot maintenance.

The next thine; to consider is the means for actuating the controlling valve means for the check valve, z'. e. valves 37 and 38.

1G indicates a horizontal shalt that is sup y ported in suitable bearings. On the shaft is a cam 50 of the proper it is turned raises and lowers the tubular actuator 40 and with it the valves 37 and 38. (ln the cam'l have shown for convenience three small circles indicating diti'ergnt positions of the parts. When the left hand circle is under the axis of the tube 40 the parts are in the working or normal running position of the engine. lVhen the second circle is under said axis. as shown, the parts'Y are in the position for stopping the engine and when the right hand circle is under said axis, the parts are in position for starting. 0n the far end ol` the sha it 1G is a crank 51 that tits into a sliding block 52, the latter beingr carried :md guided by the fork at the end of the lever 53. The lever is pivoted at 54 and on the left hand end is provided with a fork thatengagges shoulders 55 on the reciprocating and rotary sleeve 56. Between the arms of the fork and said shoulders are rollers 57 to reduce friction.4 ln broken and dotted lines are indicated the positions of the centers under the Y working, stopand starting positions above referred to.

Turning` to Fig. 1 it will be seen that the upper end of the sleeve which is splined on the rotary shaft 58 is provided with a suit able cam 59, said cam operating the starting valves, as will be seen later. Under normal running or working conditions the cam is idle, merely rotating with the shaft of 'the-rotary valves for the scavenging pump and itself islgeared to the main shaft 6l indicates a/ double seated starting valve 'controlling the passage of high pressure air compression spring times to force the abutment downward.

The abutment ils forked to receive stroller 65 that engages the cam 5i) when it is raised. The particular engine described is designed shape which as CIK *Ll will 1. n nn engine nl the char l hu Sm'lbed. the mmbmntmn nf n wmlnng CyL "ing fluid under pre:- 1g :x art" f :will lhln. :a 1n- ,lfllliegl unlwfln pw :wtnzl'ting the Hurting and n l: nlwa :and means for pnsthcly if t i moving hn nuns into (mex'atvu position with respect to the valves whereby the starting valve is opened and the pressure actuy ated valve closed.

8. In an engine of the character described, the combination of a working cylinder, a conduit supplying fluid thereto to inject fuel, a pressure actuated controlling valve in the conduit, a pilot valve therefor, and means 4for moving the pilot valve in one direction to equalize the fluid pressures n opposite sides of the controlling valve and permit it to close, and in the opposite direction to establish a difference in pressure on opposite sides and permit it to open.

I 9. 1n an engine of the character described, the combination of a working cylinder, conduits supplying fluid thereto for starting and fuel injecting purposes, valves for the conduits, a casing therefor, a constantly rotated cam for the starting valve, a manu ally operated cam for controlling the action of the injecting valve, a means movable with the second cam for moving the first into and out of operative relation with respect to the 1starting valve.

moving the actuating means to operativel position and operating the controlling valve.

1l. In an engine of the character described, the combination of a working cylinder, a conduit supplying starting fluid thereto, a valve therein, a cam for operating the valve, ajstarting lever for moving the cam into and out of operative position with relation to the valve, a conduit supplying injectin fluid to the cylinder, a normally open va ve therein, and means controlled by thestarting lever for closing said last named valve when the cam 1s moved to operative position.

12. In an engine of the character described, the combinatlon of a Working cylinder, a conduit supplying starting fluid' thereto, a valve therein, a cam for operating the valve, a. starting' lever for Amoving the cam into and out of' operativel position with. relation to the valve, a conduit supplying injecting fluid to the cylinder, a normally open fluid actuated valve therein, means controlling the' admission of actuating fluid thereto, and means controlled by the starting lever for operating the first named means when the cam is moved to operative position.

13. In anl engine of the character described, the combination of a working cylinder, tanks containing fluid under pressure, one of said tanks supplying starting fluid to the cylinder and the other injecting fluid, Separate controlling valves Jfor the starting and injecting fluid` the valve controlling the injecting fluid being normally open, andv means acting to close the inlectiug valve when the starting valve is open.

In witness whereof I have hereunto set my hand this 16th day of July 1912.

' BERNHARD KRMEH.

IVitnesses:

HEiNRICH DECnAMPs.

ALFRED Iiirrsn.

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