DE20307755U1 - Internal combustion fuel system has petal-shaped vortex generator in intake manifold - Google Patents

Abstract

An internal combustion engine e.g. diesel or petrol engine has a fuel supply system which atomises fuel and releases this to passages feeding the cylinders. The passages esp. incorporate inward-inclined petal-like vortex generator tabs (2). The vortex generator tabs consist essentially of a strip of sheet material with a regular series of curved slits (1) at an angle alpha of 30[deg] to 70[deg] to the passage transverse axis.

Description

w-s-G40503Air swirler

Applicant: Werner, Uwe Steinstr. 5 01728 Cunnersdorf

Inventor: Werner, Uwe Steinstr. 5 01728 Cunnersdorf

Representative: Pat.-Anw. Ilberg & Weißfloh European Patent Attorneys Prellerstr.

01309 Dresden

Title: Device for swirling air in intake ducts of

Combustion machines and systems using liquid fuels

Dresden, 28 April 2003

w-s-G40503Air swirler

Device for swirling air in intake ducts of combustion engines and systems for liquid fuels

Device for swirling and stratifying air in intake ducts of internal combustion engines and systems, particularly for saving fuel in motor vehicle engines.

Nozzles are used to ensure that the air is mixed well with the liquid fuel. This causes the fuel to be atomized and ultimately the fuel to mix well with the air. Additional devices are also known that create turbulence in the air or the air-fuel mixture. For example, DE 295 11 894 Ul describes an intake manifold that consists of a rotor as part of an electrical machine that is provided with grooves that create turbulence in the intake manifold when the rotor rotates. This also reduces fuel consumption, among other things. The disadvantage here is the relatively high cost of the device.

The invention specified in claim 1 is based on the problem of creating a device for swirling and stratifying air in intake ducts of combustion machines and systems for liquid fuels, which can be manufactured inexpensively and can also be subsequently installed in existing machines and systems without great effort.

The invention achieves that, in addition to the advantages already listed in the problem statement, fuel can be saved by using the device according to the invention. The design of the device enables quick and easy adaptation to any intake manifold of the internal combustion engine.

Advantageous embodiments of the invention are set out in claims 2 to 5. The further developments according to claims 2 and 3 serve to optimize the effect of the device for the purpose of saving fuel. The further development according to claim 4 enables easy adaptation to the respective size of the intake manifold. The protruding web

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The lower area of the cylinder can easily be shortened to the required size. It is also possible to bend the device to a larger size. In the further development according to claim 5, the device consists of a plastic material with all the advantages of inexpensive mass production.
5

An embodiment of the invention is explained in more detail with reference to the drawing.

Fig. 1 the rolled up device in a plane without bevelled surfaces, Fig. 2 the top view of the device,

Fig. 3 and Fig. 4 each show a side view offset by 90 °.

The device for swirling and layering air in intake ducts of combustion engines and systems with liquid fuels is made in the simplest case from a sheet metal strip. Fig. 1 shows the already worked out segments 2, which are separated from each other by circular slots. The segments extend over approx. 2/3 of the total height. Approx. 1/3 remains as a strip in the form of a web without slots or other processing. In the example, a segment 2 is removed at the end or beginning above the web. This sheet metal strip is bent into a hollow cylinder that fits precisely to the diameter of the intake manifold of the combustion engine.

The circular arc-shaped slot 1 between two segments 2 remains a circular arc on the back of the segments 2. On the front of the segments 2, the circular arc changes into a parabola. The segments 2 are bent inwards at a right angle at an imaginary edge 3. The imaginary edge 3 begins at the end of a slot 1 and runs across the segment 2 to the beginning of the opposite slot 1, forming an angle α with the base of the hollow cylinder. This angle α can be between 30° and 70°.

Optimum results when using the device according to the invention for saving fuel are achieved when the device has five or seven angled segments 2.
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Claims (5)

1. Device for swirling air in intake ducts of internal combustion engines and systems with liquid fuels, characterized in that a hollow cylinder without a bottom and cover, which is adapted with its outer diameter to the inner diameter of the intake duct, is axially separated and has circular arc-shaped slots ( 1 ) in the upper region, which extends over approximately 2/3 of the total length, and the segments ( 2 ) between the slots are bent inwards at a right angle at an imaginary edge ( 3 ), the imaginary edge ( 3 ) from the end of a slot ( 1 ) to the beginning of the opposite slot ( 1 ) forming an angle α to the base of the hollow cylinder of between 30° and 70°. 2. Device according to claim 1, characterized in that the segments ( 2 ) are parabolic on one side in the region of the slots ( 1 ) and circular-arc-shaped on the other side. 3. Device according to one of the preceding claims, characterized in that the upper region of the hollow cylinder consists of five or seven angled segments ( 2 ). 4. Device according to one of the preceding claims, characterized in that a segment ( 2 ) or a part of a segment ( 2 ) is missing at the beginning or end of the axial separation. 5. Device according to one of the preceding claims, characterized in that the complete device consists of a plastic injection-molded workpiece.