DE1576504A1 - Fuel pump for internal combustion engines - Google Patents

Description

CAV Limited -Λ, -j. 1 ·> Υ

Warp le Way, / »et on
London / Kn ^ land

for internal combustion engines

i-iö i> iinuun ₍ ., refers to eir.e 3rennß tof! 'pumpefUr Verbrtmnun ^ skrnl'tinaschlnen, the üesteht nus * .. ins ίχ' It ζ pump with a squat and eia ^ n Pxi ιοί ^{1 to the} side of ? de Verbrennunsakreftr-iiiachliie t.eetexiert viiPd, unu wotool a Verteilüt * in time from the Vertarenrmn, -; "is driven rtniaßohiae i.eeteuert" akr and diesel ζύν distributor has a türder1eitun t 'before by the BrennstoiT; ^ represents incpritspumpe during of the i ^? örderhut> eE flows, with this supply line, alternating with each other. through which the fuel during the delivery stroke a

With such ilnöpritapurapen it is known the pressure In dor Leituuf, which the Auel & SUffnun ^ with a Einaprltzdüee connects, to be canceled when the fuel has flown through the pipe. For your purpose the extraction opening is curiously out of coincidence with the Delivery line moved when the K «« n »dea crouch * aioh

. 1 -o9

w <> ^ 909887/0926. _

BATHROOM OFiiQINAL

has thrown past. A zone is created in the Nuckenbahn. In dor no andtran _o der otöflell *>; e takes place.

When at the end of this zone the pump piston is close moved outwards, has ".time that the rest of the Pressure in the lines of the distributor «the puap piston just now moved "and so strongly that the pistons to hang on to their attacks. DNA has the consequence this is due to the fuel remaining in the lines a void is created, and that void gives rise to difficulties hlnelohtlioh an exact measurement of the amount of fuel, those in the distributor and in the injection pump ! ^

1st of the "cam ao formed daii for a Siiiaprltjehub and after the connection of the delivery line nit: ie: i Auela3 interrupted 1st, IMD bovoi · the LJihlaiUeitun; öfi'net a'ich to SinlaiöfiYiua ^ out of Puinpenkolbeii alch to.. a beotimmtet. £ jotra in dei · it can move in the Rlchtun _{£ r.,} before he can move up to the calibration ^ e ^ t during a FUllhubes bewo, whereupon the i'ur ^ is held penkolbeü kurzaeitig.

The £ rfindun.j is explained using the drawing.

Fig. 1 2el £ t an exemplary embodiment in section the invented Srennetoffpuape,

let a cut after line * -ϊ. the pi ^ ,. 1,

Fi _c;. y shows an eventuality of an integral part of the fuel pump according to FIGS. 1 and 2,

- 3 - 9 0 9 8 8 7/0926 -ad OBlölNAL.

-3- - ⁷ 6504

Fiji, h zeif.t In an expensive Mnflatab the Kockenprof Jl,

;. 5 »« ibt Hhnlieh wl · Pi ^. ^ the horicenprofile when using dee in b'i _iu . j i-jezei. ten individual parts.

The supplied pump is intended for a diesel engine with four cylinders and consists of a housing in which a rotary actuator Π liej., T «is driven by the diesel engine in a timed manner. At one end of the distributor a copper bore hole L is formed, in the upper part of which there are two pump pistons I move. The puncture pistons move " _Cl and Bioh" at jbacIi crehentletn distributors still inside under the Virkun, from rolls 14 that from Hocken l'j ein dein Au3enuiafen,.; of a Hocicenrin ^ es 1υ to be moved.

At the other end of the more expensive, a screw pump 17 r «with an Aue lü in: Geiittuau sirid: üil a Cinlafl l'J, which is connected with a, BreimetofTDehttltur. Between that. Alnlnü and the auplnii of this ttJrderpump lie _t -, t a Hlütlaetun, evewtil -o, df »s determines the pressure of the conveyor track.

In the distributor let a -Λη. fIe.do,. ι trained with a. Lude uit der «.uerbohruii. 1. is in contact. This guidance is given to another authority; * in connection with a rnual guidance; *. / - of the distributor, which alternates with rotating distributors with four in , leiohern ViitucelAbiitnnd.; arranged ^ rderöffnun _f ..en. dee GehKuaös in Verbimiun ,. conant. The outlet openings are connected to the injection nozzles of the diesel engine, which are not shown. At a nmi point there is the än _t a 1 eitun ^ · in relation to four in .leiohem WinkeleDstnnd aii, arranged

9 C 9 8 8 Γ / GP 2 6
BAD ORDINAL

-4- »S7550 / *

radial installation instructions 24, which are used with calibrated rotating

Distributor alternating with inlet openings 25 de «Oe-

en htfuses in connection. The inlet opening ateiÄi via lines in the housing in connection «it de» Auelafl 18 of the feed pump. To control the fuel flow through the inlet opening ^r , a throttle valve 26 is provided, the setting of which is carried out by a Hegler as a function of the speed of the diesel engine. When the pump pistons move inward by means of the crooks 15, the delivery line 22 is connected to an outlet and the inlet line 24 coincides with the inlet opening 25 during the time interval between two successive meetings.

The profile of one of the cam tracks is shown in Figure 4. Each cam track has the same shape. After a feed opening is open (point A in Fig. 4), the roller 14 is moved upwards. During this upward movement of the roller, the pump pistons move inwards, so that fuel flows through the feed line 22 and over the corresponding discharge an engine cylinder. When the roller rests against Kaarni's cam track, the supply of fuel to the sun engine cuts out. The cam chamber is shaped so that the roller can move downwards a certain amount, and the roller is then stopped until the sleep opening closes (point 3 in Fig. 2). The purpose of this movement of the pistons 1} near the bottom and it is necessary to relieve the pressure in the line, and to connect the corresponding AusIaJUffnunti and the injection nozzle to the Puapenleitung, which connects the delivery line bit of the outlet line. After the conveyor line is closed, the roller can move down a certain amount, whereupon the roller again

909887/0926

- 5 - BADORlQiNAL

-5- 1 ¹ :> ⁷ 5 5 0 4

is held kursseltig, a result of remaining in the distribution lines Brennetoffdruck is relieved, and you Zweek of xwelten time intervals is ineffective in the dl · Rolling ·, let "ι * dl" movement of the roller and de * piston to stop. " After the long break; the Noekenbahn know aioh move the roll goose down. The inlet opening 25 is connected to the loading line 24 at point C (Pig 2), and the pump pistons then move closer to the outside under the effect of the fuel entering the transverse bore.

In Fis "3 Au another" leadership "form let in the form of a" valve "gexeigt you ·" schematically the JPJrderttffnungen d> and is the corresponding AuslaJBffnungen. Each valve consists of a housing, because one lower end has a groove 30 in which the axial movement of the ealtus is guided within a bore 41, and the bore 4i is part of the line which leads to the delivery opening connects with the corresponding channel opening. The upper part of the valve is conical and forms an abachlead, since a seat 4a around the bore H is sewn together. The valve is loaded by a screw pressure spring 43, so that the closure member is pressed onto the seat. A cylindrical ring 44 lies between the suction link and the Aw groove.

The fuel flowing through hole 41 to the outlet moves the valve body against the spring force, until the fuel flows through the inlet «to xu» outlet. If the flow of fuel stops »then the spring pushes the valve body in the opposite direction and at the same time fliefit a bestiaet · kenge des fuel «« urtick »u the cross hole «12, before the upper part of the valve cure» pers den 31ts 42 touched «The * u belonging to this version Moekenbahn is in Flg. 5 shown. Dl «

90988 7 / OB 26

BATH ORIGINAL

• 6 ·

The pump opening is open at point D to the delivery line, and at * Brennatoffflul the fuel rate is increased "When the 2 ** enn" pumping stops, "ou lieSt calibrate the delivery course to Peseieren de" Hocicenkamne ". The boiling point is indicated by a Z , and when the valve is closed, the connection of the delivery line kit to the outlet opening is interrupted. Then the pump pistons can move further outwards "while the pressure in the pump lines is iet", which is followed by a curvilinear side, during which the pump pistons are held. Then the opening 24 is opened, namely as point P, but first let the delivery line £ 2 open. In this type of flow, the point 0 is at the point where the delivery line 22 is open, and as is the point at points £ and W, because the connection through the delivery valve is interrupted.

Patent application

BATH

909887/092 6

Claims (1)

Claims 1. Fuel pump for diesel engines with an injection pump with «in« «on the side of the diesel engine controlled * tan nooken-operated pump piston, and old one timed Rotary distributor controlled by the diesel engine «its delivery line at the rotating distributor alternately old several Auelai openings dea Puapengehtuses In connection koaat, and deaaen inlet pipe with a rotating distributor old an ElnlaJU opening sur cover koaat, daduroh recognized that the The path of the Hoekena controlling the pump piston is designed in this way after an injection stroke, and after Interruption of the connection of the delivery line old an outlet opening, and before the inlet line old Connected to the loading effect is the pump piston among other things, “a bestlaaten amount in the direction of his movement moves during the full stroke, whereupon the movement of the Puapenkclbena In dlsjer Blohtung is interrupted before the Puapenkolben has moved to its end position. S. fuel pump NaOH claim I ₀ wherein t daft the cam track has a first zone * in which the connection of the delivery line is interrupted by a AuslaB-opening "and a iwelten area; In dea, the poppet piston is stopped in the direction of its movement during the filling stroke, the two areas being so far apart that the pressure in the distribution lines is relieved. 5 «fuel pump naoh Aiiapruoh 1, daduroh marked» between the delivery line and the alluvial opening an FSrderventil arranged iat, which is short after the completion of the promotion of fuel by the ORJG | _NAL 90988 ' ⁷ / CS2b tthllfit, «iHi 41« WctHnWhn 4M Pump tnlfBib · »·« intn Btrtlefe feet * In üa k «lo« guns d «a Pu« p «nkelb« o · «rfvlgi« «o *« l d «r frnkt« «· 4m V «ntni tieh fl« hll «i • irti «h asnbigt * aowvlt in d «n BATH