US1130833A - Arrangement for reversing internal-combustion engines. - Google Patents

Description

M. R. M ATTI. ARRANGEMENT FOB. REVERSING INTERHAL COMBUSTION ENGINES. APPLICATION FILED SEPT. o, 1913.

1,130,833. I Patented Mar. 9, 1915.

3 SHEETS-SHEET 1 WITNESSES: INVEN T0 W 57 v 7% cfi ia; ATTORNEY.

THE NORRIS PEYERS ca. PHUIG-IJTHG. WASHIIIGIUN. D. I:

M. R. M ATTI. ARRANGEMENT ran RBVERSING INTERNAL COMBUSTION ENGINES. APPLICATION FILED SEPT. 9I 1913.

1,1 30,833. Patnted Mar. 9, 1915.

3 SHBETSSHBET 2- WI TNESSES w 03, wimlwmfi I1 TTORNEY.

1 NORRIS PETERS 60.. PHOTDJJTHO" WASHINGIDN. D C- m. R. MATTI. ARRANGEMENT FOB BBVBBSING INTERNAL COMBUSTION ENGINES.

APPLICATION FILED SEPT. 9. 19 13.

Patented Mar. 9, 1915.

IIIIH-I-I IIII IIIIII r! I I I I I I T NORKIS PETERS 00.. FHOTDLITHQ, WASHINGTON. By C nanylthreaded a-, engage threads on tain nroirnnni/riirfl, or was; swnin'nii.

' amane mamron'aav as e INTERNAL-COMBUSTION Emma' To all whom it may concern Be it known that I, MAX- engineer, citizen of Sweden, residing at Falun, in the Kingdom of Swedemhave 1nvented certain new and useful Improve ments in Arrangements for Reversing Internal-C0mbustion Engines, of which the following is a specification.

My invention has reference to internal combustion-engines, and especially to that class of engines provided with a controlling member for varying the feed of-fuelto the engine cylinder and provided with means fortimingthe-explosions according to the position ofthepiston of the engine. When engines of this kind shallbe reversed, 110W? ever, the reversal cannot be effected until the speed of the engine I has been considerably decreased. In order to avoid this inconvenience and to make the feed offuel inde-; pendent of the time of reversal, my invention provides fora means whereby the action is made entirely automatic in that the reversal ofthe stroke of the fuel pump is effected only after-the speedof the engine,

due to a previous interruption of the eX- plosions, has been sufliciently decreased to effectively reverse the engine piston, after which the parts controlling the feed of the fuel return to their normalpositions.

- In the drawing Figure lis a longitudinal section of a construotionalform of the regu-- a is a1-reciprocating rod which may be o'peratedby a'cam' or an eccentricon the engine shaft-and which carries the sleeve 0 provided with. a cam-portionb, which on: coming in contact with aroll 4' secured to a bar 6:. moves the latter as the rod a reciprocates. The rod a, issoarrangedthatit can varying the position of the sleeve 0 relative to the rod a whereby the timeout feeding of the fuel and'air to theengine cylinder can be varied. To this end the sleeve cis interthe rode, the sleeve 0 upon the turning of therod a being guided by a pin 7 entering a" longitudinal groovein a sleeve g surrounding sleeve-0. The pinis' fixed inthe sleeve c .f .i.

Specification of Le'tters Paten t.

RICHARD MATTI,

vided with a scale, and upon the end'of therod is secured a nut h whereby the rod acan befturned' to move the sleeve 0 longitudinally along said rod and thereby vary thetime ofthe feed of the fuel and air duringthe running of the engine. 7

For reversing a special provided, which is secured to the .sleeve 0 and the rod 11 insuch a manner that it always eifects the reversal of the strokeof the pump piston at a precise-position of the engine piston, independent of'the relative posltlons ofthe sleeve 0 and'rod a. Forthis purpose the cam-piece b is arranged on a H I PatentedMar.9,1915 .f

' Application filed September 9,1913. Serial No.788,912. 7 i

cam-piece ,b is

bar 70 adapted to slide in a corresponding groove ofsleeve 0. This bar 70 is also secured to the circumference of: a disk Z which rotates withbut does not slide relative to the rod a. Consequently, ifvthe positionof sleeve 0 andtherebyof cam 0 be changed by the turning of the nut 71. on the'rod a the cam-piece b will retain its position relative to the rod also that it will always act on thebar cZ at eXactlythe same position of the engine piston. Y

- The longitudinal movement of sleeve g i is prevented by a pine, (Fig. 1), but the sleeve At-nor-malspeed the sleeve g and handlef will occupy the position shown-in Fig. l.

When-the engine shall be reversed the sleeve 9, by means of the handle f, is turned into the position shown in Fig. 3 and with it the sleeve 0, in whichposition the cam-piece bwill be brought under the rollz' on the bar (1],

(Figs. 1 and. 3). The sleeve 9 is held in this position against the tension ofa spring" 5 (shownin Fig. 3) by a pawlt which;

engagesa notch in a movable piece 6 mounted in a disk g, which disk forms part ofthe slee've'gw The notch-in said piece 6-is-so arrangedthat when the latter is moved to the position shown in Fig. 8, the pawl l is I immediately act through the roll 2' on the bar cl after the sleeves-g and c-have been turned by the handle f into the position;

shown in Fig. 3, as in that case a-counterexplosion would'occur which would endanger the engine, the spe'edof the latter must first be decreased. Tothis end, as the sleevesg and are turned into the position shown in Fig. 3, the bar (Z carrying'roll i is' lifted, thereby preventing the cam-piece bf from 5 coming in contact with said roll, and fur-' thermore a means is provided to prevent the cam-piece- Z) from engaging roll d until the speed of the engine has been so farrde creased that it can be safely reversed. The device for lifting the bar (Z is. shown in Fig. 2 and consists of a projection'm-fixed to the movable. part 9. As sleeves g and, 0 are turned, the projection m comes in contact with the spindle n of rollv i, thereby raising the latter and with it the bar d to such an extent thatv the cam-piece b is prevented from engaging the roll In thisposition of the parts the engine, will run for a time without a supply of, fuel and the speed, therefore, will gradually decrease. When the speed has sufficiently decreased, the reversal can be. effected, for Whichpurpose the projection m is. with drawn fromunder the spindle n of roll 2' allowing the latter and the bar alto descend, so that the cam-piece Z) can engage the roll i. In Figs. 5to 8 0 indicates a reciprocating 1 member provided with two prongs p and 1",

adapted to be engaged by prongs t and. u respectively of a tilting member s, which member is also provided with an arm as. A spring insidea casing v ,tends'to keep the arm wof the tilting-member sin the position shownin Figs. 6 to 8. Arm w is fulcrumed 35. on a pivot 3 on which the casing o inclosing the spring is suspended and the pivot y is mounted, in the movable piece 6.

The reciprocating member 0 is fastened by screws to the same part by which the rod 40 a above mentioned is'moved back and forth so that the member 0 will reciprocate at the same speed as the rod a. As long as this speed is greatenough, the prongs t and 2/ will pass each other without having time to catch. As soon, however, as the speed of the engine, and thereby of the reciprocating member 0 has been sufficiently decreased, the prong p on member 0 will engage the prong t on the tilting member s, and the movable V piece 6 will be-moved to the left in Fig. 6,

whereby the projection m willbe withdrawn from under the roll 2' on bar 03, a spring 2 surrounding a bolt 3 secured to the disk 9 being at the. same time compressed, Upon thenext stroke 'of the pump piston, therefore, the cam-piece 6, coming in contact with the roll 2' of the bar d will cause an 1 7 especially large quantity of fuel to be fed to the engine, whereby a counter-explosion is 50 effected sufficiently strong to reverse theengine piston. As soon as'the engine has thus been reversed, the cam-piece Z9 returns to its original position, shown in Fig. 4:, so that the fuel feed again becomes normal.- In.

order that the said cam piece I). act only at The essential feature of my invention lies in said fuel pump, said cam-piece being ar' 125.

the time when the reversal of the engine left in Figs. 6 and l'. The movable piece 6 is now moved still farther to the left,'the

position show'n inFig. 8 being reached approximately at the sametnne as the reversing stroke of the pump piston isfinished In this position of the movable piece '6 the pawl 4, as above mentioned, is withdrawn, permitting the sleevesg and 0, to bereturned, to their original positions shown in Fig. 4 by the spring 5. In thispositionof the parts the cam Z2 is again under the roll 2' and the operation of the fuel feed'pump continues as usual] In order that theprojection m when in the position shown in Fig. 6 or 7 be not moved to e the right; in said figures, the "tension of the springs2 andl5 is so adjustedas to cause a sufficient friction between the" pawl a and the movable piece6to'prevent spring 2 from moving'piece 6 to the right in Fig. '6 or 7; As soon, however, .as the pawl a has-released the movable piece 6, which occurs when the latter has been moved to the position shown in Fig. 8, the projec- Y tion we is moved by spring 2- tothe right in 95 Fig. 8, and thereby also the piece 6, while,

as has already been stated, the disk 9 and sleeves g and c are returned .to their normal positions by the spring. r

It is evident that many changes may be made in the embodiment ofmy invention as 7 shown in the drawing, without departing thereby from the spirit of my invention.

this that the camwhereby the reversal of the engine iseffected, is not brought in-'en-- gagement with the members controlling the feed of the fuel until the speed of the engine has'been decreased to such 'anextentias-to permit the reversal of the engine-to take place without any danger to the engine, anda further essential feature of myinvention is that thefeeding of the fuel to the engine cylinder is influenced by saidcam-piece only at one single stroke of the fuel pump piston, at which stroke the fuel supply tothe engine cylinder is greaterthanthe normal fuel" supply. I

7 I claim as my invention l 1. In. internal combustion engines the combination with the engine cylinder and the reciprocating piston, of a fuel pump, a reciprocating cam-piece adapted to operate ranged to complete the;cycle,of operationof said fuel pump 'in both, directions ofmovement of the said, reciprocating piston prior to its completing its stroke, andfmeans for reciprocating said cam-piece. 1 i

2. In interal combustion engines thecombination with the engine cylinder and the reciprocating piston, of a fuel pump, a reciprocating cam-piece adapted to operate said fuel pump, said cam-piece being arranged to complete the cycle of operation of said fuel pump in both directions of movement of the said reciprocating piston prior to its completing its stroke, means for reciprocating said cam-piece, a movable sleeve carrying said cam-piece, a second cam-piece arranged on said sleeve for effecting the reversal of the engine, and means for reciprocating said sleeve.

3. In internal combustion engines the combination with the engine cylinder and the reciprocating piston, of a fuel pump, a reciprocating cam-piece adapted to operate said fuel pump, said cam-piece being arranged to complete the cycle of operation of said fuel pump in both directions of movement of the said reciprocating piston prior of said fuel pump in both directions ofmovement of the said reciprocating piston prior to its completing its stroke, means for reciprocating said cam-piece, a movable sleeve carrying said cam-piece, a second cam-piece arranged on said sleeve for efond cam-piece from operating said fuel pump.

5. In internal combustion engines the combination with the engine cylinder and the reciprocating piston, of a fuel pump, a reciprocating cam-piece adapted to operate said fuel pump, said cam-piece being arranged to complete the cycle of operation of said fuel pump in both directions of movement of the said reciprocating piston prior to its completing its stroke, means for reciprocating said cam-piece, a movable sleeve carrying said campiece, a second cam-piece arranged on said sleeve for effecting the reversal of the engine, means forreciprocating said sleeve, means for adjusting the position of said second campiece relative to said first cam-piece, a movable projection adapted to prevent said second cam-piece from operating said fuel pump, and a tilting member adapted to cooperate with said movable projection, when the speed of the engine has been reduced to withdraw the said projection permitting the said second cam-piece to operate the fuel pump substantially as and for the purpose described.

In testimony whereof I have aflixed my signature in presence of two witnesses.

MAX RICHARD MATTI.

Witnesses GRETA Pnrsnn, HARRY ALBIHN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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