FI104013B - injection device - Google Patents

Description

! 104013

spraying

The present invention relates to a spraying apparatus for internal combustion engines, in particular for diesel engines, equipped with injection valves for fuel or ignition oil and high pressure compressed gas.

For both two-stroke and four-stroke engines, structures are known which inject high pressure compressed gas into the nozzle near the ignition-dead center, which is ignited by a jet of fuel oil from one nozzle or another part of the nozzle.

It is an object of the invention to provide a spraying apparatus for motors which achieves a particularly favorable spraying behavior and whereby the spraying valves can be placed in a small space.

This object is achieved according to the invention according to the features of claim 1. The subclaims include other advantageous features.

The main advantages of the invention are that both injection nozzles are assembled in a single holder 20 and thus, within a small space requirement, an efficient spraying system for fuel gas and fuel or fuel oil is achieved. This is achieved essentially by applying hydraulic loading on the nozzle needles in place of the large steel springs.

25 The problem of reliably opening the apparatus within the short time required to adjust the correct amount of gas to flow out is achieved by lowering the hydraulic pressure by means of a threaded spray pump mounted on the guide edges and by means of a dual piston system, which affects the spray valve for gas operation. Depending on the required control time, the larger of each of the twin pistons is raised more or less vigorously, Λ corresponding to the amount of control pumped in this time, after which it then falls back at the end of pumping the control pump and closes the gas nozzle control needle valve.

To obtain the simplest possible system for the hydraulic loading of each needle, one can obtain the same hydraulic closing pressure by appropriate selection of 2,104,013 needle diameters and control piston diameters.

In addition, it has turned out to be advantageous that the fuel to be ignited is always sprayed in the direction in which the ignition fuel is generated by the ignition fuel. This results in a good mixing of fuel and air. The desire thus described can hardly be provided by two different spray nozzles, and so far only very difficult by double nozzles or multiple nozzles.

Therefore, according to the invention, it is proposed that the jet layers of gas nozzles and front jet nozzles, which in turn may also be a main nozzle in pure diesel operation, are directed such that the jets coincide three-dimensionally on a common plane with a circumferential line.

Each of the spray nozzles is disposed adjacent to the same nozzle holder, being assembled with a double piston assembly and a segment with corresponding pressure holes and ducts by means of a threaded sleeve connected to the 20 coupling elements in which the supply ducts are located.

An example of an embodiment of the invention is shown in the drawing and will be explained in more detail below. In the drawing, Fig. 1 is a longitudinal section of a holder having both injection valves, Fig. 2 is a cross-sectional view taken along the line of Fig. 1: II-II, Fig. 3 is a cross-sectional view of Fig. 2, III-III, Fig. and Fig. 5 is a side elevational view of a jet in which the jets ·, coincide in a certain plane.

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The injection apparatus essentially comprises two injection valves 2 and 3 assembled in the holder 1, including 35 nozzle needles 4 and 5, which open or close the injection holes 36, 37 in the nozzle element 35 and 34.

One jet valve 2 is for supplying fuel or spark oil to the cylinder and another jet valve 3 for supplying fuel gas to the cylinder.

3, 104013

The segment 8 connects the holder 1 by means of a threaded sleeve 9 to the connecting element 10. The connecting element has channels 11 and 12 for supplying a closing pressure S and a control pressure Z to the segment 8, where the channels continue to pass.

The spray valve 3 has a double piston apparatus D which is coaxially arranged with respect to the nozzle needle 5 and which, on the one hand, obtains a closing pressure S through a channel 11 and on the other hand a control pressure Z through a channel 12.

The apparatus D comprises a first diameter piston 30 of larger diameter and a smaller diameter piston 31 resting against the nozzle needle 5.

In the space R between each piston 30 and 31 there is a channel 12 for control pressure Z, whereby the channel 11 ends in a space 13 at the end of the larger piston 30. The other channels 14 15 are for supplying fuel gas to the valve 3 and end into the annular space 16.

The second valve 2 in the holder 1, which is for fuel or for supplying the fuel oil, comprises a nozzle needle 4, the end 17 of which protrudes into a space 18 connected to a passageway 20 19 through which the nozzle needle 4 can be pressurized S from the passageway 11. To connect these two channels 11 and 19, there is a transverse channel 20, e.g. a milling groove, between the connecting element 10 and the segment 8. The fuel or the fuel oil is supplied to the valve 2 via a second passage 23 in the annular space 21 25.

In the holder 1, two nozzle needles 4 and 5 are shown. For larger motors, for example, it is conceivable that instead of one valve needle 5 there are several which may be concentric about the nozzle needle 4. The high pressure compressed fuel gas flows through two gas passages 14 and into the annular space 16 of the nozzle needle 5 and acts on the shoulder 5a of the nozzle needle 5 for the purpose of raising it upwards. In the intermediate segment 8, the needle 5 is actuated by a small piston 31 which is pressed by a larger piston 30, under a sealing head S conducted through a conduit 11 and against a gas pressure G.

When the control pump P conducts a certain amount of control oil through the conduit 12 and its associated conduit 12a into the space between the double hosts, the larger piston 30 moves away from the smaller piston 31 due to 4 104013 pressure so that only a relatively small force from the control oil pressure and a small piston 31 at the front face. Thus, the resulting pressure G of the gas-5 can raise the needle 5 upwards by means of the aforementioned shoulder 5a. When the control pump P has completed its pumping, the large piston 30 is immediately depressed again by the closing pressure from the conduit 11 and the needle 5 closes, thereby stopping the gas supply from the conduit 14.

The space 18 above the nozzle needle 4 is connected to the closing pressure channel 11, e.g. by a transverse channel 20 connected to the channel 19, so that the needle 4 is tightly seated in the seat 32 against the gas pressure of the cylinder. , which is below the shoulder 4a of the nozzle needle 4, then the increasing pressure there will move the nozzle needle upwards, thereby causing the injection of fuel oil or the injection of diesel fuel.

As shown in more detail in Figures 4 and 5, the sparking oil-20 nozzles 34 and gas nozzles 35 have their respective spray holes 36 and 37, which are each uniformly spaced to a large extent. Therefore, the gas jets 38 emanating from the spray holes 36 and the fuel jets 39 coming out of the spray holes 37 coincide with a circle K 25 in the common plane E at one point or at one point.

The midpoint M of the circle is between each nozzle needle 4 and 5 so that the jets hit each other at approximately the same distance from the midpoint M.

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Claims (8)

Spraying apparatus for internal combustion engines, in particular for diesel engines, equipped with injection valves (2, 3) for fuel or spark oil and for high pressure 5 compressed gas, characterized in that each of the nozzle needles (4, 5) of the valves (2, 3) , acting on the nozzle needle (5) of the second injection nozzle (35) for fuel gas and the nozzle needle (4) of the second nozzle (34) for fuel or ignition oil, on the one hand, and on both pistons (30), 31) influences the determined control pressure (Z) which acts against the closing pressure (S) and the pressure of the combustion gas (G) during the spraying operation, and is that the control pressure (Z) controls the opening and closing state of the second nozzle needle (5); wherein a second nozzle needle (4) can be subjected to pressure action through the channel (23) or with fuel oil to open it against the closing pressure. Spraying device according to Claim 1, characterized in that the double piston device (D) has a larger piston (30) which cooperates with a smaller piston (31) so that the larger piston (30) is movable against the closing pressure (S) and rests against the nozzle needle (5) and, when the fuel gas is supplied, is displaceable against the control pressure (Z) to achieve the opening position of the nozzle needle (5). 3. Anordning enligt patent krav 1 eller 2, tongue pads 30 av att den för stängningstrycket (30) avsedda, account insprutningsventilens (3) större piston (30) ledande kanalen '(11) med hjälp av en tvärsgäende kanal (20) (fräsning) , 104013 ansluten till en karial (19) gravel leder till den andra insprutningsventilen (2). Apparatus according to claim 1 or 2, characterized in that the passage (11) leading to the larger piston (30) of the injection valve (3) of the closing pressure (S) is connected via a cross passage (20) (milling) to the second passage (19). for the spray valve (2). 9 · 4. Anordning enligt face av patentkraven 1 - 3, kantetecknad av att munstyckshällaren (1) harmun munstyckshällaren (4, 5) bredvid for stock, colors den ena munstycksnälen (5) for business för matning av gas ooh den andra munstycksälen (4) thank you för matning av bränsle eller. Apparatus according to any one of claims 1 to 3,. characterized in that the nozzle holder (1) has two nozzle needles (4, 5) adjacent to each other, one nozzle needle (5) being constructed for gas supply and the other nozzle needle (4) for supplying fuel or fuel oil. 5. Anordning enligt face av patentkraven 1 - 4, transducers av att munstyckshällaren (1) häller sig ihop med io det segment (8) millen innehäller dubbelkolvsanordningen (D) samt stängnings- och styrtryckskanalerna (12 och 18) med hjäl (9) som skjuter ut bakom munstycks-hällarens (1) fläns och som är ansluten account et förbindningselement (10) som innehäller matarkanalerna för is stängnings- och styrtryck (11, 12). Apparatus according to one of Claims 1 to 4, characterized in that the nozzle holder (1) is held together with the twin piston assembly (D) and the segment (8) for the closing and control pressure channels (12 and 18). by means of a projection behind the flange of the nozzle holder (1), which is connected to a connecting element 5 (10) having closing and control pressure supply channels (11, 12). 6. Anordning enligt face av patentkraven 1 - 5, a nipple opening att atting munstycksnälar förbränningsgas (5) concordantly anordnade et flertal munstycksnälar (4) för branding. Apparatus according to one of Claims 1 to 5, characterized in that a plurality of nozzle needles (4) are centered around the fuel gas nozzle needle (5) for the fuel ίο. 7. Anordning enligt face av patentkraven 1 - 6, kangnetecknad av att bäda insprutningsmunstycket (35, 34) • prone to insertional fördelade insprutningshäl (36, 37. och att de fränd-insprutningsmunstycket (5) och insprutn) (35). ) utkommande strälarna 25 (3 8, 39) har et gemensamt träffplan (E) och en gemensam circular träfflinje (K) (avständslinje) och att cirkelns mittunkt (M) ligger mellan de tvä insprutningsmunstyckena 1 (34, 35). Apparatus according to one of claims 1 to 6, characterized in that each spray nozzle (35, 34) each has a plurality of spray holes (36, 37) distributed uniformly, and that jets project from the ignition injection nozzle (5) and the fuel injection nozzle (35). (38, 39) coincide on a common plane (E) and with the same circular line (K) (distance line), and that the center of the circle (M) is between each spray nozzle (34, 35). Apparatus according to one of Claims 1 to 7, characterized in that the space between the rear end of the gas nozzle needle (5) and the smaller piston (31) of the apparatus (D) is connected to a leakage hole (33). 104013 1.Insprutningsanordning för förbränningsmotorer, roar. skilt för dieselmotorer, försedd Raed insprutningsventiler (2, 5 3) för bränsle eller thank you och för högtrycks- förbränningsgas, kännetecknad av att pä ventilernas (2, 3) bån munstycksnälar (4, 5) inverkar ett gemensamt inverter med hjälp av en dubbelkolvsanordning (D) inverter cradle ena insprutnings-io munstyckets (35), som är avsett förbränningsgas, munstycksnäl (5) och ä andra sidan omedelbart head andra munstyckets (34), som är avsett eller thanks, munstycksnäl (4), och att pä anordningens (D) baba pillar (30, 31) inverkar et bestämt styrtryck (Z) som motkerkar is stängningstrycket (S) och förbränningsgasens (G) tryck under insprutning, och att dennälens munst (5) pp and munande ochoch st stäng kan kan kan kan kan st kan st st st st st st st st st st st st st Z Z st (Z Z Z Z Z Z (Z Z Z Z Z Z Z Z (Z), colors den andra munstycksnälen (4) med hjälp av bränslet eller olol ,olol som som som som som som som som som som som, som somäsäs genomomomomomomomomomomomom ((((((23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 för öppnande av den mot stängningstrycket. 2.Insprutningsanordning enligt patent krav 1, stump nipple (D) ingär en piston (30) som har en större diameter och som samverkar med en piston (31) med en mindre diameter ä att den större birch (30) male 25 förflyttas mot stängningstrycket (S) och Vilar mot munstycksnälen (5) och kan förflyttas mot stängrtrycket (Z) vid matning f av förbränningsgas för bringande av munstycksnälen (5) Here you go. 8. Anordning enligt face av patentkraven 1 - 7, 30 rotatecknad av att utrymmet mellan munstycksnälens för gas (5) bakre bean and anordningens (D) mindre plunger (31) v. förenat med ett läckhäl (33).