May 7, 1935. H. BECKER 2,000,555 DRIVE FOR FUEL PUMPs FOR COMBUSTION POWER ENGINES Patented May 7, 1935 2000,555 UNITED STATES PATENT OFFICE 2H555 DRIVE For FUEL PUMPs Fot CoMBUs ON OV NG N BI Heinrich Becker, Augsburg, Germany, ???????? to Machimemfabrik Augsburg-Nürnberg A. G. Augsburg, Kermany, a corporation of Germany Application December 1, 1930, Serial No. 502,886 '. In Germany December 20, 1929 4 Caimas. (C. 123-139) . A. This invention relates to internal combustion in the housing so that the roll g will be maintained engines, and more particularly to fuel supply in engagement with the cam f. The cam plate f means therefor. is secured to the crank arm by screws ef which One of the principal objects of the invention pass through annular slots in the cam plate so 5 is the provision of a fuel feeding means for in that the latter may be adjusted in the direction of 5 ternal combustion engines in which the fuel pump its movement. It will thus be apparent that the is operated by a cam mounted directly on the fuel is supplied to an engine cylinder by a fuel crank shaft of the engine. pump which is driven from the crank arm asso Another object of the invention is the provi cated with that particular cylinder so that the l0 sion of a multi-cylinder internal combustion en fuel injection will take place when the piston is 10 gine each cylinder having a fuel valve operated near the upper end of its stroke. by a mechanism which feeds fue to the fuel . For engines adapted to operate in reverse di valve of an adjacent cylinder. rections, a second cam f is provided in addition Other objects and advantages of the invention to the can f. The roll g of the cam lever h may will be apparent from the following description, be moved into engagement with either of these 15 the appended claims and the accompanying draw cans depending upon the direction of rotation ing, in which: desired, by longitudinal movement of the shaft i. Fig. 1 is a section of an engine having a fuel Before moving the shaft longitudinally the roll pump drive embodying the present invention; g is lifted from the cam. For this purpose a jaw 20 Figs. 2 and 3 are front views of a portion of the o is keyed on the shaft is so as to cooperate with 20 engine, shown partly in section, illustrating the a similar jaw p provided on the hub of the lever two positions of the can operated ever; h. When the shaft i is turned, the jaw o engages Fig. 4 is a sectional view of a part of the engine the jaw p and lifts the roll g from the can which showing a modified forma o construction; and it engages, after which the shaft it is moved lon Fig. 5 is a top plan view of a portion of the gitudinally so that the roll g will be opposite 25 engine shown in rig. 4. the other cam. Referring more particularly to the drawing To adjust the roll g and vary the time that the by reference letters, ig. 1 shows a portion of injection period begins, an adjusting screw q is an internal combustion engine, having any suit provided in the housing r of the engine, the screw 3) able number of cylinders in which are pistons engaging an arm hi? rigid with the lever h (see Fig. 30 operably connected to the customary crank shaft. 1). The arm h' is wide enough to contact with The engine herein shown is of the two-cycle type the screw q when lever h is in position to engage adapted to operate on the fuel injection principle. either of the cams for f'. As a modified form engines of this type heretofore have been prote of construction the arrangement shown in Fig. 4 35 vided with fuel pumping means driven usually may be used, in which the push-rod ke of the fuel 85 from a separate fuel pump shaft, but in accord pump plunger is provided with a parts. This part y ance with the present invention the fuel pumps s, which is fixed to the rod t limits the downward are driven directly from the crank shaft of the movement of the rod, as it engages the top of engine thus providing a very simple and light a nutt which is threaded on a sleeve a mounted 40 veight construction. As shown the fue pump a on the pump housing. By turning the nut, the 40 is mounted on a housing b preferably supported lowerint of movement of the push-rod it may be on the outside of the cylinder, a fuel lead pipe c raised or lowered, and as the lower end of the extending from the fuel pump to the injection push-rod is operably connected to the crank shaft nozle d of the engine cylinder. The fuel pump in the manner shown in Fig. 1, the roll gy of the is provided with a plunger which is connected cam lever may be adjusted relative to its co- 4.5 to a push-rod k and driven by lever mechanism operating cam. operated by a can plate if secured to the crank In engines in which the fuel is injected by arm of the crank shaft. The cam plate f op means of compressed air, as shown in Figs. 4 and erates a lever h which is provided with a roll gy 5, the fuel valves to are preferably operated at the 50 engaging the can plate, the lever he being loosely proper times in the cycle of operation by con- 0 carried by a shafti and connected to a link d, nections to the fuel pump mechanism. Thus the the upper end of which is pivotally connected to fuel valve operating means of one cylinder is the bottom of the push-rod it. The latter oper adapted to feed fuel to the fuel valve of an ad ates in a bore 2 in the housing support b and is jacent cylinder so that the proper amount of fuel provided with a fange as engaged by a spring frt will be supplied to the fuel valve before the pre 2 determined time of opening. The parts on the pair of cams on said crank shaft, a cam lever pump plunger k is shown having an arm si car adapted to be operated by either of said cams and rying a rod D which in turn is connected to the forming a driving means for said fuel pump, a Operating lever ac of the fuel valve y. When the rotatable and endwise movable shaft rotatably fuel Valve is opened compressed airforces the fue supporting said cam lever, and coupling means On in the fuel valve into the engine cylinder. Te Said shaft and cam lever so that the lever may be fuel is supplied to the fuel valve before the latter lifted from the cam with which it is in engage Opens, the fuel being forced to the fuel valve as ment by rotational movements of said shaft and the pump plunger of an adjacent cylinder is raised, moved to a position to engage the other cam by 10 and the fuel being retained in the valve until the longitudinal movement of Said shaft. - 10 Valve is opened. Thus the fuel valve of each cylin 3. In an internal combustion engine of the der may be supplied from the pump mounted on character described, engine cylinders, pistons op an adjacent cylinder and operated by the crank erable therein, a crank shaft connected to Said arm aSSOciated with such adjacent cylinder. pistons, cams on said crank shaft, fuel pumps Fig. 5 shows the fuel pump at of the cylinder provided on the sides of said cylinders and each 15 designated by the numeral arranged to supply having a pump plunger mounted for reciprocatory fuel to the valve of cylinder 2, while the pump movements in a direction parallel to the cylinder mounted on cylinder 2 supplies fuel to the valve axis for supplying fuel to said cylinders, each fuel of the cylinder , the fuel pipes y and a crossing pump having an end thereof closely positioned to complete the necessary connections between the adjacent a cylinder end, a fuel Supply conduit 20 fuel valve chambers of the cylinders, and the connecting each pump end to a cylinder, and pllImpS. mounted plunger operating levers actuated by Said While the forms of apparatus herein described cams in directions substantially radially of the Constitute preferred embodiments of the inven crank shaft axis. tion, it is to be understood that the invention is 4. In an internal combustion engine, a piston 25 not limited to these precise forms of apparatus, and cylinder construction, a crank Shaft having and that changes may be made therein without an eccentric crank pin operably connected to the departing from the scope of the invention which piston and crank arms fixed to said crank shaft is defined in the appended claims. and extending to one side of the shaft axis for the 30 What is claimed is: support of said crank pin, a fuel injection nozzle 30 1. In an internal combustion engine, im combi in the cylinder, a fuel pump for supplying fuel to nation, a piston and cylinder construction, a said injection nozzle and provided on the side of crank shaft connected to the piston, a fuel pump the cylinder with its upper end closely adjacent the upper end of the cylinder, a short fuel pipe having a pump plunger for supplying fuel to the 35 3 5 cylinder, a pair of cams on the crankshaft, a cam connecting said pump and said nozzle, a pivoted lever pivotally Supported on a fixed axis and lever for operating said fuel pump, and a Seg adapted to be operated by either of said cams and mental shaped cam fixed on the Outer end of One operably connected to the pump plunger, and of said crank arms and engageable with a por means for moving said cam lever along Said axis tion of said pivoted lever to move the same in a 40 and from one of said cams to the other.