DE7929549U1 - DEVICE FOR COLLECTING FUEL - Google Patents

Description

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Pierburg GmbH & Co. KG
Leuschstrasse 1.

Neuss

Device for collecting fuel

The innovation relates to a device for collecting fuel in a suction pipe of a mixture-compressing machine Internal combustion engine, with a collecting device located at the bottom of the intake manifold.

Such a device is known from DE-AS Ik 76 I78, which consists of a sieve cone which protrudes into the free cross section of the suction tube and which is supposed to collect the precipitated fuel until it is taken up again by the mixture.

The sieve cone creates a flow resistance in the suction pipe on which a stronger wall precipitation forms than with a smooth intake manifold, which leads to a loss of performance in the area of the higher partial load and full load leads. Liquid fuel in the intake manifold leads to driving errors and worsens the composition of the exhaust gas »

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The! Inflation is the task of BUgrunde, a device BU «that does not cause any loss of performance and whose wall precipitation is low.

In a device of the type mentioned at the beginning, this object is achieved according to the invention in that the collecting device a porous filler material that is almost closed with the suction tube base and is open to the suction tube having formed reservoir. In one embodiment, the reservoir of metal chips is formed with a Sieve are covered. In another embodiment, the reservoir is formed by a sintered metal plate.

An exemplary embodiment is shown schematically in the drawing and is described in more detail below. Show it:

Pig. I a suction tube

Fig. 2 shows a section along the line II - II of Figure 1 and

3 shows a section through the collecting device

The suction tube 1 has a collecting device 2 which is approximately flush with the suction tube base 3. The device 2 consists of a base plate 4 in a housing 5t which is screwed to the suction pipe 1. Above a base plate 4 there is a reservoir 6 made up of a maximum of porous filler material. If it consists of fine metal chips, it is covered with a sieve 7 towards the suction pipe 1. This sieve can be omitted if the reservoir is formed by a porous sintered metal plate (not shown).

The highly thermally conductive filler material stores fuel and releases it in vapor form. It can also cause warming the collecting device can be provided, for example by means of a cooling water connection 8 or a Exhaust gas connection located at this point very quickly when the engine is cold, so that already during the run-up phase, this is the speed range from start to idle speed, the volatile components of the Fuel to be evaporated. During a cold start, the reservoir stores the wall precipitation and releases it slowly down free. The fuel that may drip when the hot engine is switched off is also stored. With a hot start, the injection quantity of the acceleration pump is saved and gradually evaporated. The reservoir can be heated continuously while the engine is running. However, the heating can also be used at a certain engine temperature be switched off via a known thermal switch, not shown.

Claims (1)

■ ι> ■ ■ claims for protection 1. A device for collecting fuel in an intake manifold of a mixture-compressing internal combustion engine, wherein a collecting device is located at the bottom of the intake manifold, characterized in that the collecting device (2) closes approximately with the intake manifold (3) and is open to the intake manifold (i), comprising a reservoir (6) formed from a porous filling material. '2. Device according to Claim I _1, characterized in that the reservoir (6) is formed from metal chips which are covered with a sieve (7). 3. Device according to claim _1, characterized in that the reservoir (6) is formed by a sintered metal plate. —1 ₁ - the f ft BL 9 SK • III Il Il It III I · · I Il Il •. I ■ II I I I I