US1260724A - Fuel-pump for semi-diesel engines. - Google Patents

Description

W. B. SLAUGHTER, Jn. & R. A. GAERTNER. FUEL PUMP FOR SEMI-DIESEL ENGINES.

APPLICATION FILED OCT- 30| 1915- 1,260,724. Patented Mar. 26, 1918.

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W. B. SLAUGHTER, JR. da R. A.GAERTNEHI. FUEL PUMP FOR SEMI-DIESEL ENGINES.

*Y APPLICATION FILED 0CT|30|19|6 1,260,724. Patented Mar. 26, 1918.

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Patented Mar. 26, 1918.

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FUEL PUMP FOR SEMI-DIESEL-ENGINES.

APPLICATION FILED OCT-30.1916.

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y WILLIAM B. SLA'UGHTER, JR., AND RALPH A. GAERTNER, 0F LOS ANGELES, CALIFORNIA,

ASSIGNORS TO PETER E. SPELLACY, 0F LOS ANGELES, CALIFORNIA.

I Specification of Letters Patent.

FEL-PUMP FOR SEMI-DIESEL ENGINES.

Patented iuar. 2e, raie.

Application led October 30, 1916. Serial No. 128,609.

To all 'whom t may concern.

-Beit known that we, WILLIAM B. SLAUGH- TER, Jr., and RALPH A. GAERTNER, citizens of the United States, residing at os Angeles, in the county of Los Angeles an State of California, have invented new and useful Improvements in Fuel-Pumps for Semi-Diesel Engines, of which the following is a speciication. r l

This inventionrelates to a fuel pump, and

particularly pertains to a pump for deliverf and independently adjusted during the operation to bring all the cylinders to apdesired harmonious efficiency.

Another object is to control a series of 011 prmps feeding a series-of cylinders simul- 1 taleously by a speed operated governor and provide means for independent manual adjustment of each pump so that the cylinders may be tuned or harmonized to a desired pitch or eiiciency and so that the energy ma be raised or lowered.

other object is to provide an adjustable timing mechanism -for harmonizing the action of the pumps with the action of the cylinders, as to exploding various oils.

Another object is to provide a simple operating mechanism which will act in synchronism with the movement of the engine pistons to deliver the fuel charge at a pre.-

determined interval.

Another object is to provide a simple pump control mechanism which may be easily manipulated to vary the plunger stroke as the mechanism is in operation.

Another object is to provide adjustable means for timing the pump in relation to the lmovement of the englne pistons as required by the various grades of fuel used and the particular engine designed.

It is a further object to provide a pump and operating mechanism therefor which is simple in its construction and which will prevent any one of the fuel -pumps from delivering fuel when itis desired to 'discontinue the combustion of fuel `within a corresponding' engine cylinder.

Other objects will appear hereinafter.

' The invention is illustrated, by way of example, in the accompanying drawings, in which:

Figure 1 is a lview in side elevation illustrating an 'engine of the semi-Diesel type as fitted with the fuel-pump and adapted to receive fuel therefro Fig. 2 is an enlarged view in side eleva-A tion illustrating the complete pump and driving mechanism.

3 is a view in vertical section and elevation asseen on the line 3 3 of Fig. 2,

land illustrates the correlation existing between the various vital elements of the pump mechanism.

Fig. 4 is a view in section as seen onA the line 4 4 of Fig. 3 and illustrates the eccentric pin formation.

Figl is a view in end elevation illustrating the arrangement of the eccentric portions on the eccentric in.

Referring more particularl to the ,drawings, 10 indicates the crank aft of a semi- Diesel engine Iwhich is provided with a-.series of cylinders 11 adapted to be supplied with a liquid fuel through conduits 12 leading from a fuel'pump 13 secured upon the cran case of the engine. The pump is formed with a series of cylinders 14 `which correspond in number to the cylinders of the engine and are in communication` therewith through the conduits 12. All of the cylinders are alike both as to construction and operation.

Reference being had to Fig.. 3 of the drawings, i't will be seenv that the cylinder l14: is formed with a bore 15 adapted to receive a cylindrical reciprocating plunger 16. This positioned around the plunger and between* plunger extends downwardly through a stuffing box17 and terminates at its lower .end Witha disk shaped head 1,8. The plunger is intended to normally be drawn downwardly by the action of' an expansion coil spring 19 Vthe stuiing box and the head 18.

As a means for mechanicallyl lifting the plunger, a pushl rod 20 is provided and reclprocates in alinement with the plunger 16 and therebeneath. The pump frame isformed with a suitable bearing p 21 v along which the push rod may travel, an expansion spring being provided to maintain the plunger m its lowermost position as limited by,

rocker arm 23. The rocker arm 23 is piv- '1 otally mounted for vertical movement upon a pivot shaft 24 secured to the pump frame. The arm extends beneath the push rod 2O and receives motion imparted indirectly from an oscillating arm 25. rlhe arm 25 is pivoted to the pump framei upon a shaft 26 in vertical alinement with the shaft 24 and is fitted at its lower end with a roller 27. lllhis rangements of the cams' may be made if deengine, al flange 30 being provided for thek sired. rllhe sleeve is tubular and is adjust# ably fitted upon the crank shaft 10 Aof the purpose. The flange 30 is formed with a series of perforations 31 and slots32 through which cap screws 33 extend to engage 'ajrixed flange 34 by whichl thesleeve is'driven. The

l ange 34 isformed'w'ith a series of threaded Y apertures through one of which the set screw f 33 may extend to positively maintain theflanges 1n a given relation to eachother. After the screw 33 has been placed in posij tion the lock screws 33 are tightened to prelvent further movement' of the -ilanges in relation to'each other. The flangel 34 is sel cured byfa tapered pin 35 t0 the shaft 10,

although other securing means might be `found desirable.

As a means for varying `then-length of stroke made by the plunger whileI the oscillating arm 25- describes la given movement,

-a slidable "Wedge 36 is" pivotally mounted upon an eccentric pinf37. secured at the end of the crank arm'38. Reference being lhad to Figs. 4 and 5 itwill beseen that the pin 37 is `formed witha large head portion 49 formed 'with aserrated edge adapted to engagev a stop pin 50 'which is .detachably mounted: within the arm 38." Adjacent this head is acylindrical body .portion 52 con- I lcentric therewith and concentrieally. ar'-v 1,aeo,724

ranged in relation'to avthreaded endA poran eccentric length is formed and adapted to 'register with the bore through the Wedge 36. It will be seen by this arrangement that ,the stroke of each pump, may be'individually adjusted by rotating the eccentric pin to advance -or retard the Wedge 36. 'The tion 51. Between the portions 51 'and 52 arms 38, one for each pump, extend down- `wardly from 4a shaft 39, to `which they are rigidly ixed, and the shaft 39 isadapted to be oscillated by a suitable mechanism se-- cured to the shaft, and actuated ,by the engine governor'. ,ln'this manner each Wedger 36 'may be advancedtoward and away from the vertical axis of the pivot shafts 24 and thanthe distance between the adjacent iaces ofthe arms 23 and 25, the 'stroke Will be varied, by manuall adjustment and by the action of the governor.

It'm'ay be found desirable to discontinue the operation'of one Vor more cylinders fof the engine and at such a time the uel supply may be stopped byA manipulation of a A lever 40 pivotally mounted upon a shaft 41 adjacent the head 18 of the plunger `16. This lever is :formedwith a bifurcated end portion 42 which spans the vplunger 20 -and 1s, adapted tobear against the lower face of the head 18. Projections 42 are formed'on 26, 'and due to the fact that they are'wider .the lower faces of the biiurcated end portions of the lever 40. These projections nor- Y mally bear upon the face of the main casting or housing to which the mechanism of the lapparatus is secured. 1n this manner limited in its downward travel and fwill thus limit the` downward movement of the plunger' 16 and the expansion of the plunger spring 19. A lock nut 43 is provided to engage thefhandle of the lever 40 `and lhold it to prevent-the plunger 20 from -striking the head 18 of plunger 16 and actuating pump. Fuel is supplied the pumps by a conduit 44 which connects with `a fuel 'chamberv 45 A.formed upon a pump casing adjacent the pumps. A' screen cup 46 is mounted within said chamber 'and .prevents uel'lsediment from passing into tubular stem 47 which "connects with the pump by" means of a connecting conduit 48. H'ilhe vfuel passes from l the pump tothe engine through the conduit 12 and a'check valvel mountedfwithin the l ,pump head.

It will be ,understood that the foregoing description ofv the pump operating mechaf nism V1s confined to asingle pump unit and that a mere multiplication otthese units is required to accommodate a multiple cylinder. engine.

en the vengine isstarted the crankshaft 10 'is rotated and will in turn rotate `the "sleeve 2 9 whichfis secured to it `v`hv the 100 the bifurcatedpol'tion of Athe lever will be flanges 30 and 34. The sleeve is adjusted Y upon the shaft by means of the bolts 33 which extend through the slotted openmgs 32 in the fiange 30 and permitJ a limited independent rotatable movement of sleeve in relation to the crank as has been previously described. This arrangement allows the fuel to be injected 4into t-he cylinder at any predetermined interval in relation to the piston movement. As the sleeve rotates with the shaft the eccentrics 28 will successively oscillate the arm 25 and will impart niotion to the a'rm 23 by the stroke Wedge 36 inter-l posed therebetween. As the arms move the wedge will oscillate upon the pivot pin 37 which has been adjusted to meet the fuel requirements of the cylinder. As the arm 23 is moved upwardly the lower push rod 20 will be reciprocated and will" engage the head 18 of plunger 16 to force it'upwardly within the bore 15 and thus force the liquid fuel out through the valve 50 to the engine byway of the conduit 12. To increase or decrease the volume of fuel delivered to the engine, the control arm 38 is horizontally swung to move the wedge 36 toward the vertical axis of the pivot shafts 24 and 26 thus increasing the stroke of the piston.

' tive.

Especial attention is called to the means for adjustably timing the action of the pumps relative tothe action of the cylinders, and comprising the cam sleeve 29 carrying the pump driving cams 28, said sleeve being loosely mounted upon the crank shaft '10,A the flange 34 being/fixed upon the crank shaft and the ange 30 being fixed to the sleeve, and the flange 30 being adjustably connectedl to the flange 34 by bolts through slots. This is an importantfeature. It provides means for adjustably timing all the pumps simultaneously to fit the actions of the cylinders, as to exploding various oils and as to the firing of the charges. l

Attention is also called to the means for manually varying the effective stroke of a and the coperating elements.

pump during its operation and consisting of the wedge 36 and the eccentric pin 37,

This construction, also provides manual means for independently varying the effective stroke' of each of a series of pumps connected to a series of cylinders and during the operation, so as to bring all the cylinders to a desired harmonious efficiency, and maintain that efficiency by a speed controlled governor, and raise or lower the efficiency by manual adjustment at will.

We claim: v v

1. In an oil pump, a pump plunger,V a stufling box around the pump plunger, a

I head upon .the lower lend of the pump plunger, a spring between the head andthe stuffing box to withdraw the plunger, manually operated means for holding the lunger against withdrawal, thereby cutting the pump out of action, a push-rod mounted in alinement with the plunger, a spring for moving the push-rod away fromlthe plunger, a rocker arm under the push-rod, an oscillating arm below the rocker arm, means for operating the oscillating arm, a slidable wedge between the oscillating arm andl the rocker arm, and manually operated means for adjusting the position of the slidable wedge so as to vary the stroke of the plunger. v

2. In an oil pump, a pump cylinder, a pump plunger mounted in the cylinder, a head upon the plunger outside of the cylinder, a push-rod engaging the head, means `for operating the push rod to operate the plunger, a spring pressing the p unger to ward the push rod, a lever pivotally mounted and connected to the head 'and adapted to limit the action of the spring, and a lock for the lever; so that the lever may be operated to raise the head and prevent withdrawal of the plunger,.thereby cutting the pump out of action.

' 3. In an oil pumpa series of ump cylinders vertically mounted and disc arging upwardly, pump plungers mounted in the cyllos inders and extending downwardly, heads upon the lovver'ends of the plungers, springs between the heads and the cylinders to withdraw the plungers, push-rods mounted in vertical alinement below the heads and engaging the heads, means for operating the push-rods to operate the plungers, levers pivotally mounted and connected to the `heads and adapted to limit the withdrawal strokes of theplungers, and an independent means for each lever for holding the lever to hold Vthe plunger against withdrawal so that each plunger may be independently operated to cut the pump to which it belongs outof action. v

4. In an oil pump, a series of pump cylinders vertically mounted and dlschargmg upwardly, a pump plunger for each cylinder and extending downwardly; a', springl for .withdrawing each plunger, a push-rod for advancing each plunger, a spring for withdrawing each push-rod, a rocker arm underl as l mamma each push'-ro`d, an oscillating arm below by operatin the shaft; and meansforindeeach rocker arm, means for'operating the `pendently ajusting the connections between 1o oscillating arms simultaneously, a slidable the arms and the sliding Wedges so asto Wedge between each oscillating arm and the vary the strokes of the pump plungers. f corresponding rocker arm, an oscillating In testimony whereof we have signed our shaft, arms -fixed upon the oscillating shaft, names to this specication.

one for each sliding wedge; so that the slid WILLIAM B. SLAUGHTER, JR.

ing wedges may be simultaneouslyloperated RALPH A. GAERTNER.

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