DE1751474A1 - Device for injecting fuel in internal combustion engines - Google Patents

Description

'1JVII

2he British Internal Combustion Engine Research Institute ltd. Slough «Buckinghamshire, England ;

Injection device; of fuel " Brennkraftmas ohinen

The invention relates to a device for injecting fuel in Br emücr aft machines.

The invention is based on the problem of the implied and expensive mechanically operated pumping devices of the previously known - based on the distribution principle Bypass fuel injection pumps and through a hydraulic Actuated Pump.Byst.em to replace. Continue to play by the invention the known types of hydraulic Booster in a nauai-yty way at one after The distributor principle is applied to the pump and method and devices for controlling fuel injection can be used in an advantageous manner, which are made possible or simplified by the invention will. The application of the known pumps, which operate according to the distributor principle, is proportionate small machines are limited and therefore there is another

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The aim of the invention is to remove this limitation, so that the distribution system can also be used on medium-sized and large machines. In addition, v / ird through the invention seeks to eliminate the requirement that exists in hydraulically actuated systems for everyone Provide a separate injection pump for the machine cylinder to have to.

According to the invention, these objects are achieved by an external pump which only controls the pressure of the servo fluid increases to a fraction of the required injection pressure, this pressure being stored in a memory and from there specified under precise regulation in order to actuate a servo piston, the one correspondingly has a larger area than the injection pump piston actuated by it, so that the fuel to be injected is subjected to the desired injection pressure.

Although this arrangement has proved to be most useful, it should be clear to the expert that the pressure of Servoflussigke.it can also be raised by the external pump to the required injection pressure. In this case, it is not necessary to provide the servo piston with a larger area than the injection pump piston. On the other hand, however, could also be the supply of

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Servo fluid from the outer pump on the side the requirements for actuation of the injection pump piston in timed to the work cycle of the machine Sequence be adapted so that the memory can be omitted.

"More precisely, the invention consists of a device for injecting fuel in internal combustion engines with two or more cylinders, a supply of pressurized fluid, a fuel injection pump piston actuated by pressure fluid, and a piston in connection with the cylinder piston bore standing fuel supply, which is characterized in that the injection piston and the pump piston bore are arranged coaxially in a cylindrical housing, which in turn is arranged in an outer housing, and that around the axis of the inner housing and the outer housing rotatable su3aoHienarbeitende openings and passages are provided which pressurized fuel is sequentially delivered to devices for injecting the fuel into the engine cylinders.

In particular, "your control of the passages" can intervene the cylindrical housing and the outer housing, a rotary valve can be provided, the openings of which are in the inner

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housing provided passages in on the work cycle 'of the machine timed sequence in or out of the box Bring a connection with the openings provided in the outer housing.

According to a special embodiment, a memory for storing the pressure fluid supplied from the supply before it is used to actuate the injection pump piston and a servo piston actuated by this pressure fluid is provided, which is in a cylinder of larger diameter than the diameter of the bore operates and actuates the injection pump piston, and that the cylindrical inner housing within the outer housing and both the cylindrical housing and the outer housing are provided with passages through which in a timed sequence of high pressure fuel from the drilling

by

tion - «» / one on the arranged in the machine cylinders Injection nozzles leading line is passed and the front of one of these nozzles is fed to the Open the nozzle valve and the Kra £ tsi | #ff iÜ-Ap. cylinder inject, and that devices are provided which the under high pressure etehen fuel from the Allow passages to overflow into a zone of lower pressure at the desired end of the injection.

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In particular, the injection pump piston can have one puupen stroke per cylinder per work stroke of the machine run, being at the end, each injection giving the fuel injection pump-.activating hydraulic fluid to a Zone of lower pressure can be delivered.

Another special LIerlanal of the invention is that the fuel injection pump actuating Liquid is fuel.

Another. Embodiment of the invention is characterized in that the device for injecting Fuel in the engine cylinder with one. a valve needle provided injection nozzle, which by the temporal Setting and accordingly by changing the Pressure of the front or back of this valve needle supplied fuel is opened or closed.

In addition, additional Passages be provided »which with the outer housing provided additional durehgangoii in connection fcring- "bar are and by which in on the working ataki; the Engine timed sequence of high pressure fuel from the hole «» r / one with all in the machine cylinder)! arranged injection nozzles koonni-

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The nicing line is passed through and fed to the rear of the nozzle, and the nozzle valve is closed to support and the injection of fuel in to end the cylinder and to keep the nozzle valve closed until the next cycle starts again Injection is required, and that devices are provided which the high pressure fuel from these passages to a zone of lower pressure prior to injection on the next working circuit let overflow.

Finally, there is still another embodiment of the invention that a device for automatic Change the setting of the! ^ Injection time Depending on the machine speed, a pump piston sliding in a bore is provided has, which is stranded with a hole with a widening cross-section »the one * opening for Escape from unW Pruofe s ^ shi & der itüeeiglcdit "forms, the amount being the? escaping | iü'4l4gkeii from "the Mäschineagöäöl> dependability, and that the durcit di # ^ -betha ^ e activity exercised. to the -;

^ e tmapenkolbezis urged uiid duroli iiö

(sinef i ','";'' S

iEraft / auf dafij other slide deö V umpenKc ^ bens

leather

daÄ ^: 4di *

• κ- ί.

• ^j Y: -Yv

|| Ι.Ι | «| 4 | Γ

Low speed and increasing fluid pressure in / c: ialdirection moves against the spring force v & rd, Oi'j CiQ cross-center surface of the hat has assumed a sufficient size to allow the pressure fluid to be drained, the overall movement in cooperation leaving the spiral grooves provided in the drive or output shaft opposite the output shaft the drive shaft causes.

Ira following are described some Ausfülirungoforaen the invention ichnungen based on the Z ^ näJier. Ee show!

Fig. 1 is a longitudinal section through an injection pump with the general of the invention,

FIG. 2 shows a cross section through the Purape according to FIG. 1

in alignment with the feed and outlet openings of the servo cylinder including representation of an adjustable throttle valve,

3 shows a section along the line I-I in FIG Representation of the adjustable throttle valve,

Fig. 4 is a longitudinal section through an injection nozzle the features of the invention,

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5 shows a longitudinal section through another external shape the injection pump according to the invention,

Pig. 6 shows a cross section through the pump in connection with a speed control valve and an all-speed and torque controller,

7 shows a longitudinal section along the line HI-III in FIG. 6, which shows the regulator system,

Pig. 0 a partial longitudinal section through the controller system in the position in which it is used during the filling of the pump by the injection pump delivered fuel regulates, and

9 is an end view of the pump for a six-cylinder engine seen from the drive side.

The Ausfülirungsform shown in Fig. 1 of the invention Fuel injection pump has a cylindrical inner housing 1, which can be rotated in a non-rotatable Outer housing 2 is mounted so that it works as a drain valve which is driven by the machine will. In the inner housing 1 are a servo cylinder 3 and an injector piston 5 in its bore 6 bev / e-

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gender servo piston 4 mounted coaxially.

A conventional Servoputnpe and memory can be provided. Such Servo unipen usually have a single piston on that of oineu single eccentric Tjzv /. liockeu operated and is driven by a hash runner speed will. The size of the memory can be reduced by the fact that the servo pump piston .above a crouch with multiple surveys is driven. For example, the number of elevations of the Ilockens can be equal to the number of The hashine cylinder or it can be arranged in some other way of squatting depending on the drive speed, which the same number of evacuations the servo-ITliquid from the pump to the Storage effects how the number of times the storage tank is emptied to the servo cylinder. Any fuel dispense from the Servo pump to the memory can "practically at the same time with the fuel delivery from the accumulator to the servo cylinder, take place. On the other hand, the servo pump can also have one or more pairs of diametrically opposed pistons, which by one or more Eccentrics or ITocks are actuated, which are operated by the machine be driven at the speed gear ratio required to achieve the above

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mentioned timing of the delivery of fuel to effect from the Servounpe, the pairwise arrangement ensures that the forces exerted on the drive shaft are practically balanced. Although these lateral adjustment of the fuel delivery is advantageous, it is obviously not a necessary prerequisite for the satisfactory work of the invention Device.

Fuel can serve as the servo fluid, but if so the engine can be operated with heavy fuel which is unsuitable as a servo fluid, can for the heavy fuel and servo-K fluid separate circles can also be provided. The heavy fuel can be pumped under the The pressure required for the operation of the internal combustion engine is fed to the inlet valve in the injection pump chamber, so that the feed lines to the individual Injectors can be filled with heavy fuel while a lighter fuel or a special one hydraulic fluid in which part of the system can be used which actuates the injection pump piston *

Regardless of what type of servo pump is used is, this must be the servo cylinder 3 via an insöhlül

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7a and cine feed opening 7 in the outer housing 2 feed in the servo liquid under placing. The main housing 1 has a feed opening 8 at equidistant intervals for each cylinder of the machine, through which the pressurized servo fluid is fed to the servo cylinder 3, which feeds the servo piston 4 according to Piß. 1 prints to the right and thereby actuates the Einspritspuopenkolbeii i. In a two-stroke engine, the Innengehäuue 1 runs with LIaschinenceschwindigkeit around and &

on a four-stroke machine with half the machine speed. In this \ 7eioe Viird the Einspritspuapen -}; be olben 5 sideways into "the -Arbeitstakt the Iiaschino abgestinntGr I olge einnal per stroke of each cylinder operated ■ Geviünseht-enfalls can voi'gesehen as Oine feed port 7 in outer casing 2 ^more?. .

The ICraf.t-material is conveyed under pressure, preferably servo pressure, 'through' the bore 6 on the right side of the injection pump piston 5 and arrives in the inner housing 1 via an axial passage 9 and an annular groove 9a in the outer housing 2 / radial passages 10 a spring-loaded feed valve 11. When the fuel injector piston 5, as previously described, is moved to the right, the fuel is pressed out under high pressure through a single radial passage 12, which with all outlets one

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Ansaiii of outlets 13 communicates, of which one for each cylinder of the Uaacliino is. From the outlet 13 a line 13a leads the under high pressure standing fuel of an injection nozzle, of which at least one is provided per machine cylinder. the The rate of delivery of fuel to the radial passage 12 during the injection period may to some extent Extent can be set by selecting the geometry of the feed openings 7 and 8.

The injection process is ended as soon as the Right-moving Einspritapunpenkolben 5 the radial Passage 12 closes, as in Pig. 1 is shown, and the connection between the radial passage 12 and an annular groove H provided in Einspritapunpenkolben 5 opens, which via a passage 15 with another Hingnut 16 in injection pump piston 5 is in communication. This annular groove 16 is at this point in time with an in Inner housing 1 provided radial passage 17 in connection, which in turn communicates with an annular groove 18 of the inner housing 1. This is how the fuel runs from the injection nozzle and the associated line via passages 19 and 20 in the outer housing 2 into a low pressure zone, for example in the sump of the servo pump or another storage space. To control the overflow

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speed can be inserted between the passages 19 and 20, a spring-loaded valve 21, which can be arranged to regulate both the opening pressure and the maximum opening cross-section. In i ^{| 1} ig. 1 shows the pressure exerted by the i'eder on the ball and the lifting of the ball independently adjustable, but this independent adjustability is only for experimental purposes and when the desired values have been determined, a simple device can be used, which fixed values for defines these sizes for all other pumps that are built for the same purpose.

As soon as the pressure at the end of the bolting 6 on later As explained in more detail, falls below the servo pressure, the feed valve 11 opens, so that on the above-described Put more fuel under servo pressure into the hole ο for the fuel pump piston pressed and the latter susammeii with the Sei "vokolben 4- after is moved to the left, whereby the servofluidum from the servo cylinder 3 is pushed out, making \ ras possible is that in the outer housing 2 an outlet opening 22 (Pig. 2) is provided to the corresponding side points of the Working cycle of the Uaschiiie with the food opening 8 im Inner housing 1 is communicated. The via the outlet port 22

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leaking liquid is, the Servopunpeiisiuapf or another supply over an easily adjustable one Choke fed according to Pig. 2 au3 one in one Bore 24 working H-7entil 23 consists of the opening 22 Opens and closes. I3oi of the downward movement of the H-valve 23 becomes the outlet port 22 gradually closed and thereby inserted into the machine cylinder injected ICraft st of fvo lines inside further reduced, as will be explained in more detail later. This downward movement, which a spring 25 counteracts, is through a preceding .. segu ent section 26 of one in FIG. 3 shown adjusting shaft 27 causes which calibration means an adjusting lever 28 can be pivoted. The segment section 25 limits the supported by the spring 25 Upward movement of the H-V ent ils 23, while the downward movement by an idle speed adjustment screw

29 is limited, which is under the preload of a spring

30 and in a threaded socket 31 which is slidably mounted in a plug 32 provided with an end cap 33. When on If an additional force is exerted on the adjusting lever 28, the Η-valve is further downwards against the resistance of the two Springs 25 and 30 moved, whereby the outlet port 22 completely closed and thereby the machine is turned off.

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But the throttle is loved by the manual adjustability also by a Hegler to set a maximum speed or any speed or adjustable by a device, plural marriage-the maximum Cross-section of the passage opening · limited, depending on the type of drive for which the machine is intended The setting of the opening cross-section by means of the throttle 23, 24 puts this out of the servo cylinder emptied liquid volume and thus the length of the movement des Servolcolbeii3 4 to the left in Fig. 1. Since the injection pump piston 5 executes the same movement, is hereby entering into the bore 6 and in one of the next injection Engine cylinder injected fuel volume set. This arrangement ensures that the desired Volume of fuel in the bore 6 is present before one of the feed openings 8 of the Imiengehäuses 1 in connection reaches the feed opening 7 in the outer housing 2 to initiate a new injection. There on this Yfeise the devices ssum measuring the volume of fuel and only to control fuel injection bfi all Injections are the same, all cylinders under always the same fuel volume under the same conditions fed. Furthermore, this arrangement ensures that the maximum return movement of the injection pump piston 5

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ends iat before the radial passage 12 in the inner housing 1 releases the next outlet 13 in the outer housing 2, which cur egg injection nozzle of another cylinder is filled.

1- ¹ Ig. 1 shows a preferred embodiment of the invention in which the servo cylinder 3 and the Sorvo piston 4 have a larger diameter than the bore 6 and the injection pump piston 5 working in this can reduce the servo pressure required for a given injection pressure or the injection pressure is increased at a given servo pressure. This arrangement does not require any change in the operation of the device as described above.

There is a modified embodiment of the invention in that da.j the cylindrical inner housing does not revolve and sw! see the two now stationary housings 1 and 2, a cylindrical circulation valve is arranged, the Open the passages described above of Iimengeliäuses 1 as described above in the work cycle of the machine in a coordinated time sequence brings in and out of connection with the passages provided in the outer housing 2.

The pump and the reservoir for the servo fluid can

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non eil α ο ine unit ..lit the fuel injection pump to be built; it is, however, fully agreed upon, that the memory is next to the Kraftöt-offeinoprit ;; - ptinpe is located.

The device according to the invention for fuel injection can be used in Susannen with conventional injection nozzles. Ιίίπüp-rit ^) UJUpen of the above "beschriöl) enen species in Yorbiiidmi ;; nit a s;) u ::; ioll lconatr ■ linked egg ^ iaariti: - dürjo su vorv / enaen. At the todaysrjuta ^ e £ e" br 'äuclLLiohe: i Breiiri kra.ft: .asclii: .iGii üeDtehen hüufiß · considerable difficulties in getting in cylinder head ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! jiior small dinensioiiiei'ter SInapriti .: düoeii böLitoht.You invented yorrichtUii ^ simplifies the yervrenduiij of .small oil injection nozzles.

The one in Pi (j. 4 darbest s linsprit-sdüsenr-iordnim ^ points a harkörniili before nozzle 40 together with hat groove gate 41, da'es from a practical point of view ijwecluiäßij is that traditional Nozzles can be used. Except the actual one In the case of 40, the arrangement has an Ilbody 42 uit Aiiüohlüijsen. 4> and 44 on, from which a passage 45 over the work area 47 t) -v ;. in new--

-, 13

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like JeiuG oin Durchga: ^ - + C :; iu .; hiiitcrcn li-.do ei;: r Vontii.tadel 4 lead ^s. In this way, the ubiquitous push rod, each, Pederplatten and ^ euereinotolls chi · au.be are omitted, which reduces the cost and the hatred of the moving parts. The usual leak fuel connection is through the sweico. L I-hole pressure closure 44 erae'bc'c.

Although the one in Pi ^. 4 äar ^ eötcllto Üi; ispri''j.: 'Ll'.ao smaller is ειΐο dio herköiiLilichcn L'inspritua'iuQn, it does not yet have the greatest possible detail achievable by applying the inventive principles. Pig. 5, however, a modified injection nozzle is still clearly visible. The AuDfilhrungaiom has a body 32 that can be cheaply produced from steel rollers, in which a valve needle 03 is arranged, the pointed end of which is stored in a nozzle 34, while its other end is inserted into the body 32 through a precisely fitting bushing 35 is pressed in. Once the nozzle 84 is in the correct position, the liquid of the body 82 is rolled over, among other things. In the rear end of the injection nozzle there is provided a connecting piece Bo , which co-ordinates the receptacle 87 for the valve needle 83, at the same time limiting the movement of the valve needle.

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DtiicZcL- 35 in the correct position with the aid of an adjusting screw 33 3; a.-ni. On the body 82 is a banjo-like Aneel-Iuss "8Q far dia uit der Vorderceite der-Y": - rl: ilnc ^ lol-i: i V-eivi.idiui "'atehcnde Lcitun ™ on _f -re-

Lr; ui. Di; iGprii:; a'-iDGn £; o:.: Left the Pi ;;. 4 "and i?". On the same-V'vict: rü'i "'riteiif. Is single in the rolling description-IiD] I on T ¹ Xj. 4 3G-Ug ^ er.onuuen. Ici the .connection 43 .! "- β * ;. . niül ·. ri.ic r "one of the Au oil ate 13 i:.: Outside ^ GhLuoc 2 fiüirci.de Lei, -;: ..; 13a aiiüchlussu: .. V / uiu, durcli die _sev? e ~ unj el-ο 21 ;: 3ρΓχ; :: ρύ.Λρο2ΰ: ο1>:;: ια I to the file end l: o- ■ eeliriül'-jr.c VT ei so tmter llechdrucl: atchcnder ICuel aV: ^ .- e ^ e-: v ; irü, v; ird diocer üoer the sag 4 ^ 3 of the front oil of the Toiitilniidel 4 ^ ■ irajofLUiri ;, "whereby dieces ei ei: von seiiici Siti · alllieb -vuid the fuel is eiiiccopritnt in the usual Woi: K in the IlaochinGncylinder. If the Ivraftsücffaufulu 'now Durcli ^ aiic 45 to the described Vicise lüiter ^ rochen yriLrd, the calibrated in the line 13a ucfindliohe fuel grate zxa overflows into an i: ieder-

Aaociaout 44 cannot be connected to a üdfcimg 49, polygamy au one of nelir.en outlets 30 on the outer housing 2 fulu't. Likewise in the Sueaaraeiüianß nit Pig. 1 ia pail the

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Outlets 13 described is for each UaacMuoiiaylindor and so: .iit an Aualaß 50 provided for jode injection nozzle, the in laterally coordinated with the work αϊ act of the Lias chine or Follow nit one provided in the inner housing 1 Radial passage 51 in connection; arrives, which in turn With the bore 6 for the injection pump piston 5 i: omuni ;; iert. V / ie described in connection with Fig. 1, closes the movement of the injection pump piston 5 to the right dexi radial passage 12, whereby the discharge of fuel via line 12a to the front the valve needle 48 is interrupted while the! movement of the injection pump piston 5 to the right continues so that fuel through an in the Einpritnpunpenkolbon 5 provided longitudinal passage 52 and provided in Binspritspuiipenlcolben 5 radial passage 53 2U one provided in the injection / puupon flask 5 Annular groove 54 is pumped. When the y / pus movement of the injector-ipenlcolbena 5 brings the annular groove 54 into communication with the radial passage 51, high pressure fuel becomes conveyed via the outlet 50, the line 49 »the connection 44 and the passage 45 to the rear of the valve needle 48, this promotion occurs a little earlier than the overflow of the fuel in the to the front of the Valve needle 48 leading line 13a-takes place. To this In other words, the pressure on the front of the valve

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The pressure exerted on the needle 4 ^s to its egg pressure set by the spring-loaded valve 21, while the pressure exerted on the back of the Veiitil needle 43 increases rapidly. As a result, the valve needle 43 is pushed against its seat before the pressure on its front side has dropped to a low value, and the fuel in front of the valve needle 43 is pumped out under high pressure, so that a fast fuel speed is maintained until the end of the injection process After this point in time, one of the feed openings 3 in the inner housing 1 releases the outlet opening 22 in the outer housing 2, so that the pressure in the bolus 6 and in the line 49 drops. Pressure is reached, the spring-loaded feed valve 11 opens and the fuel, which is under servo pressure from the axial passage 9, maintains this pressure and pushes the fuel pump piston 5 and the servo piston 4 to the left at the same time that the injection nozzle is kept closed until the next injection.

All necessary pressure changes have been made on this site terminated at both the front and rear of the veiitil needle before the return movement of the injection point

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penkolbens 5 takes place. By twisting the Imiengehäuaes 1, the radial passage 12 is closed as soon as the line 13a has been emptied, and a little later the Rr-dial passage leading to line 49 closes 511 this being done shortly after the outlet port. 22 has been opened. This arrangement also ensures that the maximum required return movement of the injection pump piston 5 is ended before the radial passages 12 and 51 the next two openings in the outer housing 2, which lead to the injection nozzle of another machine cylinder.

When the servo piston 4 reaches the end of its stroke to the right, it taps the fuel leakage in front of it through a passage 55, an annular groove 56 and a passage 57 to a spring-loaded check valve 5 ³ , from where it is connected to the servo pump or another Yorrat is returned.

According to a modified embodiment of the invention can lead to the rear of the valve needle 48 line 49 by a valve 21 corresponding, adjustable Spring-loaded valve 59 are relieved, which via a passage 60 in the outer housing 2 and an annular groove 61 and a passage 62 in inner housing 1 with the

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iilgiiut. 54 ". This relieving of the line 49 occurs shortly after the high pressure oil has been flown off this line. The valve 59 provides one, lo.jrountoii outlet passage for fuel for the further level of the fuel injector piston 5: d ΐ-iläet on this yieise a shock absorber, v / elclior the Eiuüpritspuapenkolben 5 and the servo piston. As soon as the eiiispritspui ^ eiucolbeii ü has stopped, - "the line 49 begins to empty itself via the valve 59, so that more time is made available for the emptying and the working time is more or less a-Gct :: e: i kuaii. The opening throttle ; the valve 59 is set slightly above the servo pressure and if the outlet port 22 is open, the pressure falls in the lead _; 49, the valve 59 'when the valve needle moves the delivery of fuel from the conduit 43 in above-J.'e OffeiiBtellung, Once the Einspritapunpeiiiwolbeii 5 also moves only the smallest piece to liniCQ, the Radialdurclilaß Vierden 51 and to Valve 59 leading passages 62, 61 and 60 brought into communication with one another by a wide annular groove 62 in the injection pump piston 5, so that some fuel is displaced through the valve 59 when the next Puapenhub

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"begins and the valve needle 48 is in its remote position emotional. ! This embodiment, "in which the individual Work steps are more gradual than normal, has the advantage that the amplitude of the wave movements caused by these working steps is reduced will.

The sun drive of the Imiengehäuses 1 required rotation is only small, so that the device according to the invention just a simple arrangement for automatic fuel distribution with changing machine speed requirement. For example, the arrangement can be made in this way be that one to lock the servo cylinder 3 plug 64 serving as a stop for the servo piston 4 is used at maximum output, which is determined by a threaded ring 65 and has a bore 66, in which a pump piston 67 slides with a snug fit, its Head 68 is provided with a head screw 69, which awei Pairs of rollers 70 carries, of which the Äfiere pair in two Engages spiral grooves 71 which engage in the side of a bore provided in the drive shaft 72 and the inner pair engages two axial grooves 71a cut in the side of one of the plug 64. The roles 70 are held in place by a split pin together with a washer at the outer end of the head screw 69.

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The axial movement of the pump piston 67 behind the Bore 66. Causes a displacement of the plug 64 in Direction of the circumference of the Imiengehäuses 1 compared to the Drive shaft 72 and in this way brings about the required forward or backward shifting of the injection time.

To achieve the desired axial movements of the pump piston 67, the fuel delivered by valve 21 and possibly also by valve 59 is fed to the right-hand side of bore 66 via passage 20, passage 73, annular groove 74, passage 75, annular groove 76, and a passage 77. The frequency of this power output from the valves 21 and 59 is proportional to the machine speed and by using the described arrangement a hydraulic fluid flow which is dependent on the machine speed in terms of volume and which acts on the right side of the pump cylinder 67 is generated A cap 80 provided in the valve piston 67 forms an overflow path for this fuel from the bore 66 to the sump or other reservoir. A spring 7 ^{8 inserted into a bore 79 of the drive shaft 72 acts on the other end of the piston 67}

66 incoming hydraulic fluid moves the pump piston

67 to the left against the increasing force of the spring 78, until the pressure prevailing in the bore 66 and the

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Area exposed to the open end of the bore:; ut 30 together are sufficient to give off the flow of liquid, which is dependent on the machine speed. Any desired adjustment of the injection timing depending on the speed can be achieved by appropriate selection of the spring 7 ⁸ and selection of the change in the cross-sectional area of the hat 80 over its length. 3? All3 a change of this injection adjustment is desired, an adjustable or exchangeable fixed ventilation opening 81 can also be provided in passage 20.

When using the simple choke according to the Pig. 2 and 3 the setting lever 28 must be operated, un the delivery rate of the Puupe per stroke to that by the speed and the Drelinonent of the Lias chine fixed length c adapt. The maximum delivery rate of the pump is determined by the maximum Piimpenhub, which is determined by the Position of the inner surface of the stopper 3 64 (3? I £. 1) is determined. The maximum pump capacity is therefore practically the same at all machine speeds.

In the pig. β and 7, two valve assemblies exi are shown, with the help of which the IJaschinö at all speeds can be adjusted, aa which the pump is adapted, and -the da3 aaiciaalo Drehaoncait the Uaschiiio

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auJ -J '-.- do :! JemLischtea Vert at τ ed er -working speed Lori'ö-ireii. These valve arrangements regulate - as well vd. ·. di3; ei2iTac: ie: i Throttle valves according to FIGS. 2 and 5 liüekfluS ve; & -oi * vo-ül from the Aualassüffhung 22.

!.., 'ei (* "· ^ .: ÄUGfCüiruii sfornieii / jenäß the 1 ^ i _1, 6 and 7 represent occurs; lic ^Ar.:jlij£: BB: Lu; .iii £ 22 verlaoceiide oil ± n a Durcli -lasö CC ei: - !, from \; o aue it via a throttle opening 9t and regulated by a Ge-Gchv; iiidi,; I: -3li-lle2Cälventil 92

a u.ircii a torque recelveatil 94 CQve ^ eXte throttle flows ui '^ iuii.j ' j5 in an ADgabedurchlasD 95 ein4 deacen outlet

9c ~ z ± z de: 7orrat i; i connection D divides. "

The Hn-Ig dei · 3oliniiig 97 »in which the Drelisioment-Hegelverttil i4 slides into the end of the Bolu'ung 98 'in much earlier the G-: oelivmiaijlieits resel valve 92 slides are both "beispiolywöiae 'by a Durclilass 99 (Fig. 6) with a 3olinnij 100'-verbtaicLen »the opposite side via a passage 101 with outer. Already in nusarxaenliang not with Fig. 1 \ v / iCritc :: Hiri ^ iüt 74 in Teraindiuig places. The already bescliriol> o: iön Yor ^ anse "bevririreii that the oil pressure in this Ring groove cicli: ^ it of Ilaschinengesclivrindiglieit increased. on aiese "» iiüe_air.; succumbs to one ifcide of each of the two Regelvontile 92 and 94 of a speed-dependent Pressure.

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The speed control valve 92 has a spring 10.5, the force of which can be changed as a function of the position of the valve by moving an Iluffo 10G, for example by means of a lever 107 shown in section. The position of the Lluffe 106 sets the LIaschinen ^ cnchwindigkeit fixed, wherein the increasing pressure a ^r: i end of the bore 98 to override the force of the spring 105 and the speed-Hegel valve bewogt 92 downward, whereby the effective cross-section 'of the opening is reduced and thus the speed is limited.

In the pail of the torque control valve 94, the force exerted by the pressure on one end of the valve, which is dependent on the Ilasohinengeschwindiglceit, is counteracted by the force of a spring 102 arranged partly in the valve and partly in a plug 103 that closes the end of the valve bore Machine speed is compressed much more and more. The setting of the valve, which in FIG. Corresponds to the axial speed, and thus the effective cross section of the opening 93, thus depend on the line speed. By appropriately selecting the shape of the torque control valve surface 104; I04, the Offmuigsq.uer8clin.itte the throttle opening 93 at different machine speeds and

009848/0437 ~ ²⁹ ~

then the achievable at different speeds. .nominalen I) reIr.icnentY, ^r erto be set so that they can be set to a bostmin Llaschinaiibetriebijart i:, i Liahue;:. ' dor efficiency dor Ilasoliine 'correspond.

The idle speed of the ^ aüoliine can be adjusted by lie limituug the abY / artefact / eligibility of the lever 106 or the lever 107 (PIg. 7), but it has followed that a smoother idling is achieved, in which the Aov.

vrird that the throttle opening 91 is a predetermined or. maintains effective linearity. This Cw'eck kaimeine rod 103 -provided soin, γ / elche adjustable supported on an angle 109 and can be fixed in its set position by a hatch 110 and which a smooth adjustment of the idle speed to an exact V-ert by limitation -'the downward sbevregiuig-. of the speed Hegel valve 92 be / irct. In cases where easy adjustability is not required, the components 103 _p 109 and 110 can be omitted, the vent 106 replaced by a simple pump piston and the downward movement of the speed control valve 92 by the inner end of a correspondingly dimensioned plug 111 be limited.

00984 8/04 3 7 '

. BATH ORIGINAL

175U74

When the speed of the Ilaschinon has been reduced to the LcerlaufaL'oh-2 aiii, La j siel · since :; Droll-; o. : ■ ..., - needle valve S 4 biu tight cm the ο ore end j do:. · ..C - '. Irv ... · ' ■■,: '{ moves. Un di ". LIascliinc anir hal \; G;,:; * αι3 ^e: ... o S ju: ■ '....!" _ To V / iirts bcv / ojt v; earth ^ - b ::: i.; piol: r.: Gi; 'JG ui ^ tel.j clnis ir .: öcluii-u'c dai ^ eö ^ oll'üc :: Hobels 1113, \ / odurch dar; ÜroL-; :: o :: ient-hGjelvGntil 94 nooL further up »; ho,; j __; t ".l ... dio Drorjseluxfiiuiij 95 Tollntänui. · lock.jj ^- o .; vrird.

Yon the passages jO νζιά 03 an do.i Ygujü ^ i; ju · ...;. Ends of the springs cuinehnendon 3o} u? Ini ₀ "c. Durchloc .-: o: ides oil vd.rd over in Pij;. 6 darr / 3otollte LurclLLüDüG 114, and 11o sun supply drained.

i ⁿ ir ;. 3 soi ^ t a still further aoeev / andelte Ai ^ ordun ^ dor Auafülirun £; sforu ~ en according to the? I _o ·. C "x: d 7. 3 & i this Ab'.vanu-1lU1 £ j v / ird the Puapenförderleiatun ^ nods by throttling the delivery of servo cylinders ri" utels of the Hegelventile and 94 adjusted, but xrirä. the Ventilonordi-Uic ^ e- / jen over the representation in Pig. 6 and 7 rotated by 90 ° and displaced via the axial passage 9, through which fuel from supply sun feed valve 11 passes over servo pressure. In this way, the inrush of fuel is throttled and dio l'enge of the fuel entering the Pui.rpe during the fill period is entered.

009 848/0437

? ■ ~ ^z \ - 175U74

ctcll ..., l: c-i der AusxiUirmigsforiii gerülß Piß. 0 work . clit: :: G ^ olve: it ± iii 92 and 94- väe above iu Susa ^ ienkar ..; ·:.: Ιΐ den ϊΊ ^. 6 micl 7 oecoliriobon.

Υι ^? α._ι; ^: .ox "Servölcolbeii 4 a younger one! Durcirneücer 'boui":.:. .ε-JL :; der Siiispritcpuiipenliolben i ?, represents the GeocL; d.: i '"ijI: eIt doa Kraft ^ toii'ctroLiö i: ur Puupeiil: n: .imer only eir.u, - -back part dex- high speed of the fuel outlet" _u 0 dec: -Servo:; * / lir.der 3, so that for the Drerr-vlüifiiicijeii 91 and 95 ^ iur correspondingly lower 'Öi'iiiiL-jsquer'ßclmitte ei'fordorlich oind and also the valves ϋΰΐαεΐ-'vLicL; the length of the length of your being held. ■

Scll.'C-; Terctiln.dlich the above description is only intended exemplary. Oharalrter wear, oo that details of the Ausriiln-xij Abivaiidlioijon can be subject to without thereby deviating from Raliaen of the invention.

-32 -

009848/04 3 7 BAD ORIGINAL

Claims (1)

175U7A ? a t e u t a η s τ) r ü c Ii ο Device for injecting fuel in internal combustion engines with two or more cylinders, a supply of pressurized fluid, a fuel injection pump operated by pressure fluid, and a fuel supply connected to the pump piston boiling, characterized in that the injection The pump piston and the pump piston bore are arranged leoaxially in a cylindrical housing, which is also arranged in an outer housing, and that around the axis of the inner housing and the outer housing rotatable toGar £.: c: iai \ widening openings luA passages are provided, Uler which is delivered under pressure Gteilender fuel subsequently to device for injection doo fuel i: i dio Ilaacliinenzylindor. VcrrichtiüiG according to Claim \\ that isehen zylindriachen the housing and the outer housing a rotary valve is provided for controlling the egg passages "zv /, the openings provided for in the Innongehäuse. Bring passages in or out of connection with the passages provided in the outer housing in a sequence that is laterally cut off on the work cycle of the machine. _{BAD 0RlejNAL} 009848/0437 - 33 - Device according to claim!, Characterized in that that a memory is used to store the supplies supplied by the supply Hydraulic fluid before it is used for actuation; of the Eiiispritzpunpenkolben and -'ein. by this pressure fluid, actuated servo bonbon provided are that in a cylinder of larger diameter works as the diameter of the hole and the Sinspritapiopoiikolbeii operated, 'and that aas cylindrical Inner housing .within the outer housing. Revolves and both the cylindrical housing and the outer housing are provided with passages through which in on the work cycle of the Ilaschiiie timed . Coordinated FoI ^ e fuel under high pressure by -θά from the bore to the one en out in the rabbit by ZJL angeordneten..Einspritzdüsen line leading 'passed and the front one of these nozzles is supplied - to open the nozzle valve and inject the fuel into the cylinder, and that means are provided are, which-let-the'-high pressure fuel overflow from the passages into a zone of lower pressure at the desired end of the injection. - 34 009848/0437 bathroom 4. Vorrichtimg according to claim 1, characterized -e'rc ; -> 5-:. · That the Einaprit ^ pu: .ipGnI: ol1..o--.> Ϊ́ · ο ZjLi. .λ.οι · ρ. · ο ArjGi-u-Jtal; - :; dor Llascliiiie jevfuils a Pu:.: pGni: uL a ^ jf ILhrt. ¹ S-. Device according to claim ' _r , characterized in that .joI: q: uj. :: q1c! I .; ^! j j, diii3 ar.i H.de each Sinopriäir.iir; the Druakxlüssirkcit u_it'j_ · dor Hegelmig der in zyliiidriüai.at Ini "-crigel-äu3o ν_.Ί 1 .. outer casing located I>:;. rciJ.äcse, v / elclie;. .i "joi: i-. .andor in on the Ai ^ eita ^ cü: ^ the Las chin e ^ oitlioL do— gestiiuiitor Jenue Icorxauiiisierou and. sa an adjustable throttle, at ei: .o zone of lower. pressure abv ~ 3. '* EbGii vd.rd. δ. Device according to claim 1, dadiixch gelcenn that the liquid actuating the fuel injection pump is fuel. 7. Apparatus according to claim 1, characterized in that that the device for injecting fuel into the machine cylinder with a valve needle equipped injection nozzle X3t, which by the time setting and the change of the Pressure of the front or Ilüclcseite this valve needle The supplied fuel is opened osv / · ge3ciilossen v / ird. 009848 / OA37 BAD ORTgÄl * 175H74 Vc --- sLnhZ :::: ;; after Anenruok;>, dadurcli cekciLü. ^,: '- < ■ - ::; "li; idri3cho :: l-iiioir; G: iäuöG suGÜtclicIie Durchiu; ·: before.-'-- uchou are, which nit im AuBcji ^ ehliusjc rcL _ \ -_> .: o}: G-.ü.- uucilt ^ li -.-; "ibia Durcheil; i £ e ,: in 7Q: cb ±: ilmij r. '. . \; ar «ii; uid d-i'-ch ^; clchc ii. oxif there ;. Arjoitcual:> ... · ■ II; u: crii.ic :: oi'JÜch lSi jcGti ..:. ; ^ he PoI ^ e under. Iloch- by ΙΓΓΓ ih i .: '.,: llo .; ii de: llasehi..aiz-'liiiior; i aiiöCorJuiotoii Ei.i ..: ■: * i «: - Ü.Uc; ^: I: o:.:. iuiii:; ierc ^ de Loi" CiLi ₁ 'iiii.durcliijeiuhr ;; ■. · ... -er; Cc>:; 2i "oe the Diice. ^ ujoftUu't will, iu.i-das Ö2 Mi "3c: acc Düseiive-i-ilc: ra unteratütceii and the .liiur '^ i'i.v.'rjii ^ from Id'aitntofr i: i don Sylindor ^ u beon- ^; · ._ ν.:; .- ', jac Uüaeiivüi.wil jocchlonooii z'd haltGi., Biu ι -:.'.: .. i'J-IoliGtei: Ai "I: eit ^ h" roiüI.itur ciae renew egg) .-. "_; - :. 'j ;; r-: i.-i _s - ■ .-- rJoraorlicli ^ J-, v ^ .J let set up ,. vo_ _ ·, · -:;. ! -.- d ;;,;, which de :. * i .. ~ tor hcc] idruch ^ teh-xid-j .-.;. · ■; »c.v3: J ve :; -äiDUu :. Durchl.icjcn in oi.> Oi ^ o.ic ;; ori ..- ·; ·: ■ "-. Druoh "· before the 2i:.:; Ri. ^ Uiij;, ei.-: iiäclx ^ en λν- .1 v.'h- ^ i.: Laui * ü" allow laoaen. VGrriehvunj iiccli Aiirpruo ·: 3, thereby jo.:oiui;:eic:ii:3t, cai? vinijc der Du.rc! iläüuo al ;: i:.; Pxrpü.iliolLe :; vcrjecchcne üeitvcijen or Yer-ciefuiire: * before are ever seen, vrolche dlt in sylinarioehe ;: -linier.jehüuae foreseen :! 009848 / 0A37 BATH ORIGINAL 175U74 10. The device according to claim 3, characterized in that that LIittel to adjust the speed of the Pressure drop and the size of the final pressure during the overflow of fuel from the to the front lines leading to the injection nozzle valve are provided. 11. The device according to claim 10, characterized! φ that LIittel to adjust the speed of the Pressure drop and the size of the end pressure during the overflow of fuel also to the rear of the Einspritsdüoenventils leading lines provided are. 12. The device according to claim 1, characterized in that a device for automatically changing the setting of the injection timing as a function of the machine speed is provided, which has a pump piston sliding in a bore, which is provided with a bore with a widening cross-section, "the an opening for the escape of fluid under pressure forms, with the Uenge the escaping liquid depends on the Mascliincngeschwindigkeit, and that the force by the liquid under pressure exerted. 009848/0437 BAD LOCATION RlGliilAL one end of the pump piston ■ is applied and by the force of one on the other end of the piston acting spring "is limited, so that the- ' Pump piston counteracts with increasing speed and increasing fluid pressure in the axial direction the spring force moves v / ird until the cross-sectional area of the groove is a for draining the pressure fluid has assumed sufficient size, the axial movement in cooperation with in the drive or The spiral grooves provided for the output shaft cause an angular adjustment of the output shaft with respect to the drive shaft, - ■ 13. Device according to claim 12, characterized in that that the adjustable throttle valve is a lever operated Η-valve. H. Device according to claim 12, characterized in that that two adjustable throttle valves are pilot-controlled by devices which have both an all-speed control and a torque-speed control cause, 15. The device according to claim 14, characterized in that . that awe! adjustable throttle valves are provided, 009848/0 437 - ^ s- ORIGINAL 175U74 those by all-speed sailors and torque-speed governors regulated v / earth, which work according to the fluid pressure, which is of the The speed of the machine depends on and against one on the opposite work surface of the Valve acting on the spring force on a working surface each valve acts. 009848/04 37 _0RIGlNAL , nspected