DE2254464A1 - STEPPED CARBURETOR - Google Patents

Description

FORD-WERKE AKTIENGESELLSCHAFT, 5 COLOGNE-DEUTZ, OTTOPIATZ 2

Stage carburetor

The invention relates to a stage carburetor with at least two air funnels, each with a fuel intake line are connected to a common float chamber.

In the known stage carburetors, there is usually in each Suction line arranged as a main nozzle designed as a constriction; The line leads behind this main nozzle to a mixing tube in which the sucked in fuel with a certain Amount of equalizing air is mixed. This mixture is sucked further into the air funnel, where it is then mixed with the Main amount of air comes to mix. In the case of a double carburetor, the two main nozzles are now in a symmetrical arrangement

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both sides of the center line of the float chamber. this has with the result that, for example, during cornering because of the effect on the amount of fuel in the float chamber Centrifugal forces compare a main nozzle with its mixing tube receives more fuel than the other main nozzle and your mixing tube. As a result, the fuel-air mixture drawn in by the one air funnel will be comparatively richer while the mixture sucked in by the other air funnel comparatively arises leaner. Such a double carburetor is attached to a V-8 engine, where usually the one cylinder bank to one air funnel and the other cylinder row to the Second air funnel is connected, then it can under extreme conditions as a result of these different Geinischzusamiiiensätze cause the engine to stutter.

The object is therefore to provide a stage carburetor, in which, in complete independence of the driving technique, especially for cornering conditions, always the same Fuel flow rates in those leading to the air funnels Intake lines occur, so that any stuttering of the engine is excluded.

This object is achieved according to the invention in that a flow regulator is arranged in each suction line, dio with one common inertial sensor are coupled so that when occurring of inertial forces acting on the carburetor in one of them Size-adapted ratio the flow in one line is more throttled and at the same time the throttling of the flow it. the other line decreased by a corresponding amount will. In those carburetors where there is oino in each intake line is installed as a constriction designed Ilauptdüse, the proposed flow controller can be structurally combined with these Main jets. An advantageous further development of the invention stands consequently in the fact that in each main nozzle there is a preferred woi nozzle needle angoordnot provided with a conical end that gokoppolt appropriately with the inertial sensor are. For the structural design of this fräghoitssen-

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sors offer numerous options. According to two preferred Embodiments consists of the inertia sensor according to the invention from a swivel-mounted in the swimming chamber Schwiramer or from a carrier for an inertial weight, which is preferably also pivotably mounted in the float chamber.

A stage carburetor is thus obtained, in which each in particular A change in the pressure head that occurs during cornering over the main nozzles as a result of the then on the amount of fuel Centrifugal forces acting in the float chamber are immediately registered by deia inertia sensor and implemented in such a way that it is in the Compared to an average flow rate in either of the two Suction lines to an increase and in the other suction line to a decrease of the respective flow rate «. The increase in the Dureli flow rate takes place in the suction line, instead, via the main nozzle as a result of an inclined position of the The liquid level in the float chamber has a lower positive pressure loads, while conversely the lowering of the delta flow rate takes place in the suction line, over the main then the greater fluid pressure weighs on. ',

Further advantageous embodiments of the Stufon pregasser according to the invention are contained in the individual claims. -

Two embodiments of the invention are shown in the appended The drawing is shown apparently and is explained in more detail below

described. It shows -

Fig. 1 is a cross section through the float chamber of a double carburetor,

Fig. 2 shows a cross section along the line 2-2 of Figs. 1 and

FIG. 3 shows a cross section corresponding to FIG. 1 through the Swimming ex-karamer of a double carburetor, the one with a different one designed inertia sensor.

In the χα don Fig. 1 and 2 shown a twin carburettor place of construction is present, as it is conventionally used for VS-Motoren'verwendet ₀ Dan GoIkmso 12 has two air funnels ± ^l i and 16, which each have

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a suction line is connected to a common float chamber 18 are. Each of the two air funnels has a main funnel 20 and a concentrically arranged amplifier funnel 22. The air sucked in via this funnel when the engine is running is generated in the area of the nozzles 24 of each booster blower 22 a negative pressure, which continues into the respectively connected suction line leading to the float chamber 18, so that Fuel is drawn in from the float chamber.

At the bottom of the float chamber, two main nozzles 26 and 28 designed as constrictions are arranged in a symmetrical arrangement on both sides of the center line of the float chamber. These main nozzles are located at the mouth end of the respective intake line 30 or 32. Each intake line 30, 32 leads behind the associated main nozzle 26, 28 to a mixing tube 34 in which the amount of fuel sucked in is mixed with a certain amount of compensating air, which is discharged via a bore 36 is added to the atmosphere. Behind the respective Misoh pipe 34, the suction lines 30, 32 continue in a line 38 which leads to the nozzles 24 of the respective booster funnel 22. The fuel-air mixture sucked in in this way is then mixed with the main amount of air in the respective air funnel, in order then to be fed to the intake pipe of the engine via the respective throttle valve kO.

The usual float 42 is arranged in the float chamber 18 to close the usual float needle valve when it is reached of a certain fuel level 44, Furthermore, In the float chamber is arranged in its entirety with 46 designated inertia sqr, which in its embodiment according to. FIGS. 1 and 2 from a U-shaped carrier 50 in the wensentllohen consists, which is pivotably mounted at 48 «The pivot axis 48 runs parallel to the straight line corresponding to straight-ahead travel of the vehicle, which is indicated by the arrow 60 in FIG. 2 is indicated. On either side of the relative to the two main nozzles 26, 28 centrally arranged pivot axis 48 is on the carrier 50 each has a nozzle needle 52 or 54 suspended, the conical ends of which, when the liquid level 44 is horizontal, around a gleiolies

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Measure partially into the bore of the associated main nozzle 26, 28 mounting. On the upwardly directed legs of the carrier 50 each a float body 56 and 58 is arranged, the Altitude above the pivot axis 48 is determined by the liquid level normally regulated by the float 42

When the vehicle is traveling straight ahead in accordance with the directional arrow 60, inertial forces act on the fuel quantity in the float chamber 18. As soon as the motor vehicle is cornering, however, centrifugal forces act on the fuel quantity even if the driving speed remains the same, so that the liquid level moves into the inclined position 62, for example. The curvature angle is directly dependent on the size of the acting centrifugal forces, which in turn are dependent on the driving speed and of course also on the respective steering angle selected for cornering. As soon as the liquid level from the horizontal position 44 moved _r follow the float body 56, 58 of its inclination. In the inclined position 62 shown in dashed lines in FIG. 1, the nozzle needle 54 will consequently be advanced further into the bore of the associated main nozzle 28, while on the other hand the nozzle needle 52 will be moved further out of the bore of the associated main nozzle 26 with respect to the relative position shown. Since there is a lower fluid pressure over the main nozzle 26 in the so-called position 62, while on the other hand a higher fluid pressure over the main nozzle 28, without the nozzle needles 52, 54 provided, this would mean that a comparatively smaller amount of fuel would then flow into the suction line 30 than into the intake pipe 32. In the case of a V-8 engine, where one row of cylinders is usually connected to one air funnel and the other row of cylinders to the other air funnel 16, this would cause the engine to stutter, caused by that either one cylinder bank then receives a fuel-air mixture that is too lean or the other cylinder bank receives a mixture that is too rich. But while the nozzle needles 52,

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are provided, an equal flow rate is provided for both suction lines 30, 32 even when the liquid level is moved into the inclined position 62 so that there is no change in the mixture composition. Of course you will form and calibrate the cone of the two nozzle needles 52, 5 ^, that it has a certain relationship of dependence on the fluid pressure possesses, which loads over the respectively assigned Ilauptdtise 26, 28 in a variable manner.

The inertia sensor 6h shown in FIG. 3 acts in the same way as the previously described inertia sensor h6 in terms of regulating the flow rate through the suction lines JO, 32 when the position of the liquid level hh changes. The inertia sensor 6h consists of a cross-shaped support 66 which is pivotably mounted at h8. Here, too, this pivot axis hB runs parallel to the straight line 60 corresponding to a straight line drive out of the vehicle. A tension spring 68 anchored to the bottom of the float chamber 18 engages at the lower end of the long web 76 of the carrier 66, which extends this at the upper end Web fixed inertia weight 78, which is kept above the liquid level regulated by the float hh, biases into the vertical. Are attached to the two arms of the Querstegeo} ~ h the two Diisonnadoln 70, suspended 72 whose ends konischo also about a certain, the same; Measure protrude into the bore of the respectively assigned main nozzle 26, 28 when the liquid level assumes the horizontal position hh. As soon as or leaves this position and comes, for example, into the inclined position 62, then the nozzle needle 70 is pulled further out of the bore of its main diameter 26, while the nozzle needle 72 is advanced further into the bore of its main diameter 28. The carrier 66 will then namely be pivoted clockwise about its pivot axis h8 , the inertia weight 78 having the pre-sapnus force over the Fodur 68.

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Claims (10)

Claims / 'Λ' ■ '' · ■ '■ - / 1, stage carburetor with at least two air funnels, which are each connected to a common float chamber via I / a fuel suction line, dadurcli g β ke ηη ζ ei ο Ii μ β t, that in each suction line (30 _s 52) © in flow regulator {52j 5% »70, 72) is arranged, which are coupled to a common inertia sensor (46; 64) so that when inertial forces acting on the carburetor occur in a ratio adapted to their size, the flow in a line is stronger throttled and at the same time the throttling of the flow in the other line is reduced by a corresponding amount, 2. stages carburetor according to claim i, wherein in each suction pipe designed as a EngsteBe main nozzle installed is _t characterized in that (28, 26) has a nozzle needle (52, 54j 70, 72) is arranged as Durehflußregler in each main nozzle with the Inertia sensor (% 6 $ 6%) coupled siiiä _e 3. Carburetor according to claim 2 stages. ₉ öa'öBrch .ge k e η η ζ e ic Ii net that the nozzle needle ^ (5 ^ $ 5%? JO ₉ 72) köölsoli have executed, with the respective narrowing, cooperating Eiüdsn. ¹ I, according to at least Stufenvergasor buckets of irorliergeliiBHideii claims, characterized geke * _{nnzeichn-et-9} that the inertial sensor (46) consists of a .schwenkbar-mounted in the float chamber (18) float (50, 56, 58) "- 5. Stage carburetor according to at least one of claims i to 3, characterized in that: ο h η e -t that the inertia sensor. (64) consists of a pivotable support (6β _? 7% »-76) for an inertial weight (78)« 6. stage carburetor according to claim 4 or 5, characterized in that the pivot axis (48) of the inertia sensor (46; 64) runs parallel to that when the vehicle is traveling straight ahead corresponding straight line (6o). • - · - 2 - 309820/0717 / 7, multi-stage carburetor according to claim 4, characterized in that the float is an essentially U-shaped support (50) mounted in the middle of its web for one at the ends of the float chamber (i8) at the level of the regulated fuel level (hk) the upwardly directed legs arranged floating body (56 »58) is formed. 8. stage carburetor according to claim 5 »characterized ichn et that the carrier, (66, 7 ^» 76) arranged in the float chamber (18) and in a position above the regulated fuel level (kh) held inertia weight (78) by a Spring (68) pretensioned in the vertical i3t. 9β stage gasifier according to claim 8, characterized in that the carrier {66 , 7 ^; i | 76) is essentially cross-shaped, with the spring (68) engaging at one end of the long web (76), at the other end of which the inertial weight (78) is attached, and with the nozzle needles (70, 70) on the two arms of the transverse web. 72) are suspended. 10. Stufon carburetor according to claims 2 and 7 _f , characterized in that the nozzle needles (52, 5 '*) are suspended on the web of the carrier (50). SAD ORIGINAL 30 98 20/0717