DE8129699U1 - DEVICE FOR IMPROVING THE COMBUSTION OF A FUEL-AIR MIXTURE - Google Patents

Description

ι · tat · · ···

• 3 t · I Il t

»Ι * ι j ι> »

η j ι J j): i sas

Device for improving the degree of combustion of a fuel-air mixture.

The innovation relates to a device for improving the Degree of combustion of a fuel-air mixture mixed in the usual way.

In the case of the known internal combustion engines, designed as reciprocating piston engines or rotary piston engines, which use their fuel-air mixture suck in, the one withdrawn in the fuel / air mixture is extracted Fuel was not completely burned. This leads to one unwanted CO in the exhaust gas and unnecessarily high fuel consumption.

In the case of reciprocating piston engines in particular, attempts have been made to remedy this deficiency by creating another turbulence in the fuel-air mixture within the combustion chamber by tangential inflow of the mixture mentioned in tried to reach the combustion chamber. With this one more time Turbulence roped a finer and more even distribution of the fuel within the combustion air achieved will. However, it is still an improvement in the form of a further reduction in the CO content in the exhaust gas and a further reduction in fuel consumption is desirable.

The innovation is therefore based on the task of proposing a device with the help of which a further improvement of the Degree of combustion of the sucked-in fuel-air mixture and thus a further reduction in the Co content in the exhaust gas and fuel consumption.

According to the innovation, this task is carried out with the help of an intermediate flange for arrangement between the carburetor and the intake pipe of an internal combustion engine, with a passage opening for the fuel-air mixture is solved in that a hollow cone open to the carburetor side is drawn into the passage opening

elastic, non-embrittling acid, oil and petrol resistant <? m material is used, the wall of which is a majority narrower Has slots and wherein the intermediate flange has at least one secondary air duct which opens tangentially into the passage opening and communicates with the outside air. By With this arrangement, the fuel-air mixture is initially sucked through the carburetor in the usual way, which has hitherto been the case The mixture used is created. This mixture must then pass the opening of the intermediate flange and the narrow slots of the The hollow cone inserted therein will pass and will be atomized again in the process. At the same time flows through the tangentially into the Secondary air nozzle leading into the passage opening tangentially introduces secondary air at high speed. This will make the The main flow of the mixture from the secondary air is mixed and filled again before reaching the combustion chamber. This filling up with secondary air also means that the mixture is made leaner. As a result of the better mixing and Atomization creates a more complete combustion, i.e. a combustion with improved efficiency, whereby the further Emaciation is made possible. The better efficiency of the combustion with simultaneous leaning of the mixture results a further significant reduction in the CO content in the exhaust gas and a reduction in fuel consumption.

According to one embodiment, it is proposed that the hollow cone has at least six slots running from the tip to the base of the hollow cone. This arrangement has proven to be particularly effective and at the same time is very simple in production.

According to a further embodiment it is provided that the hollow cone consists of a high pressure polyethylene, during the Intermediate flange is made of a polyamide - 6.6. High-pressure polyethylene for the hollow cone has proven to be particularly resistant and at the same time easy to process. Polyamide -6.6 is also easy to process, has the required

lent strength and, due to its basic elasticity, enables direct installation as an intermediate flange without use i / on additional seals. By using the said A device for carrying out the method can be manufactured in a functionally reliable and, at the same time, particularly inexpensive materials will.

The device according to the innovation will now be explained in more detail using an exemplary embodiment according to the accompanying drawing will.

Show it:

Figure 1 intermediate flange with inserted hollow cone in plan view

Figure 2 intermediate flange according to Figure 1 in side view

An intermediate flange 1 with a circular cylindrical passage opening lies over the two surfaces 9 and 10 on the one hand (Surface 9) on the carburetor and on the other hand (surface 10) on the intake manifold of an internal combustion engine and is in this arrangement Clamped tightly by means of screws passing through the mounting holes 3. The carburetor and intake manifold are not shown in detail. On the carburetor side, the intermediate flange 1 is coaxial to the passage opening 2 on a centering seat 4, in which the hollow cone flange 5 of a hollow cone 11 is inserted. Of the The hollow conical flange b is tightly inserted into the centering element 4 of the intermediate flange 1 by the carburettor via the already coated clamp pressed in. In the exemplary embodiment, the hollow cone 11 points in the direction of β from the hollow cone base, that is to say the hollow cone flange Narrow slots 6 running hollow cone point. The mixture generated by the carburetor flows during the intake stroke of the internal combustion engine from the hollow cone base in the direction of the hollow cone tip. Here it is sucked through the narrow slots 6 and again atomized and swirled.

The intermediate flange 1 has 4 evenly over the circumference of the

* ti it ·· ·· t ft · t

* · «Tt t t ic · ■ f

circular cylindrical passage opening 2 arranged, tangentially secondary air nozzles 7 opening into this. This secondary air düpen 7 are available via their nozzle inlet opening 8 with the Outside air in connection. In this way - e.g. caused by the on the outside of the hollow cone by the Suction process existing negative pressure - secondary air through the secondary air nozzles 7 tangential to the main flow of the mixture flow in at high speed and thereby further swirl the mixture and the resulting additional, additional Lowering the pressure improves the atomization and mixing process. At the same time, the incoming secondary air the mixture emaciated. The combustion efficiency, which is more favorable due to the improved mixture, makes such a leaner possible. The result is a further reduction in the CO content in the exhaust gas and, at the same time, a reduction in fuel consumption.

The use of high-pressure polyethylene for the hollow taper is particularly beneficial. High-pressure polyethylene is easy to process, is very elastic, does not become brittle in the cold and is acid, oil and petrol resistant. The use of eight slots in the position shown has also proven to be particularly effective in terms of effect.

The use of 4 secondary air nozzles in the illustrated Longitudinal arrangement with a nozzle diameter of 1 - 3 mm has also proven to be particularly cheap. In the case of an engine of the upper mid-range range, there is a secondary air nozzle diameter when using 4 secondary air nozzles of 2, b in diameter shown to be particularly effective.

Furthermore, the use of polyamide - b, 6 for the production of the flange has proven to be very advantageous because on the one hand, this material is easy to process and, on the other hand, it has all the mechanical properties required here. Overall, such a device can be manufactured and installed extremely inexpensively and easily. The installation already in

Factory as well as the retrofitting of existing carburettor engines Is equally easy. The device has particularly proven itself in the design according to the described Ausführungsbbei game as Proven to be particularly effective. The use of the device also enables the complicated design that is necessary today To simplify the combustion chamber again, whereby the production costs can be reduced.

■ · · ■ »l» »tt» · t

• · · »suffered t t> · ■>»

···· tll · ·

express «to *

CCt X «II * I · ■ I

'lc «« ■ tt I

Cf CC IC <«· · ·

CtI CCf ft "

«It» ν tit cc cc ·; «

7 -

List of the reference symbols used

1 Intermediate flange 2 Passage opening 3 Mounting hole 4th Centering seat Hollow cone flange 6th Slots 7th Secondary 1 uf tdiise 8th DUsen inlet opening 9 area 10 area 11th Hollow cone

Claims (3)

Protection claims 1. Intermediate flange for placement between the carburetor and the Intake pipe of an internal combustion engine with a passage opening for the fuel-air mixture, characterized in that in the passage opening is a hollow cone, open towards the gasifier side, made of elastic, non-embrittling acid, oil and gasoline-resistant material is used, the wall of which has a plurality of narrow ocMitze and that the intermediate flange at least one tangentially opening into the passage opening, having secondary air nozzle communicating with the outside air. 2. intermediate flange according to claim 1, characterized in that at least six from the tip to the base of the hollow cone o Slots are provided. 3. Zwischenflansc'i according to claim 1 or 2, characterized in that that the hollow cone consists of a high-pressure polyethylene, while the intermediate flange is made of a polyamide - 6.6.