DE2366067A1 - Internal combustion engine fuel processing - by passing compressed fuel and carrier gas through catalyst into inlet manifold - Google Patents

Abstract

Liquid fuel is processed by atomising it to a mixt. with a carrier gas (exhaust gases with air added). The mixts. is compressed by a piston compressor and passed near the end of the stroke through a catalyst into the intake manifold of the engine. This injection is timed to take place during the last 20-40% of the opening time of the inlet valve which has drawn in a surplus of combustion air. An auxiliary piston runs at half the speed of the main piston in the cylinder. On its down stroke, it draws in a mixture of atomised fuel and of a carrier gas through a hole in its cylinder wall. At the top of the stroke, a hole in the piston coincides with one in the wall and the mixture, compressed to a high pressure, is injected through the catalyst into the inlet manifold. The suction valve is open through 240 degrees but for the first 60% of its openings time it draws in air; fuel injection is timed for the least 20-40% to ensure ready ignitition of the mixture by the spark plug. The piston head design ensures good ignition in spite of the high excess air ratio. The exhaust gases from the engine contain an extremely low percentage or toxic constituents because of the complete combustion.

Description

Device for processing liquid fuel

The invention relates to a device for processing liquid fuel for feeding internal combustion engines, which is atomized with a gas serving as a carrier to form a non-ignitable mixture, which is produced in the course of a fission process Passed over a catalytic converter with the supply of heat and then into the intake duct of the internal combustion engine is initiated.

Such a device describes the DT-PS 739 518th Das
The mixture is passed through the single catalyst after it has been generated without any significant increase in pressure. This is disadvantageous in that the device requires a great deal of volume to generate a given throughput.
An internal combustion engine connected to the device
has a relatively high proportion of poison gas, and the mixture may only be incompletely burned.

The invention avoids these disadvantages. The task is yours based on proposing a device of the type mentioned, which is good for use in internal combustion engines suitable, whereby only small amounts of poison gas are generated and / or grounded.

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To solve this problem, the invention is characterized in that that the mixture is highly compressed in a compressor with a piston before it is introduced into the heated catalyst which is so connected to the internal combustion engine, that the blowing out of the fuel gas takes place at a time period which is in the second part of the opening time of the associated inlet valve is located. This delayed supply of the combustion gas results in a stratified charge during the suction process. In the combustion chamber of the lYlotor This creates a flammable one near the spark plug Mixture accumulated while there is combustion air further away or a lean mixture. The intended Toxic gas-free or low-poisonous gas is achieved in that the mixture has an overall excess of oxygen, but is ignitable in the area of the spark plug.

This device is preferably supplemented by the fact that the compression in the presence of a further catalyst he follows.

Preferred measures regarding the delay period result from claim 2.

A preferred shift in the blowing time in the range high load is specified in claim 3.

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Claim 4 characterizes a preferred extension of the Blow-out time in the range of high load to full load.

The invention is explained in more detail below using an exemplary embodiment. Do this from the drawing and the description of further features of the invention.

Show it:

1 shows a compressor pump with the devices for sucking in the fuel and blowing out the fuel gas;

Fig. 2 shows the same device connected to a motor with stratified charge;

Fig. 3 shows part of the cylinder head; and Fig. 4 shows a control diagram.

In a cylinder (i) there is a specially designed piston (2) driven by a crank or eccentric drive. At the head of the cylinder there is one that is adapted to the shape of the piston Cylinder cover (3). On one side there are one or more inlet openings (7) for sucking in the fuel with the carrier gas, on the other side of the

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There is a blow-out duct (8) in the cylinder. On the The side on which the exhaust duct (8) is located is a Housing (4) connected to a catalytic converter (5) and an outlet (6)

The piston (2) has a conical shape at its upper end Recess, the cylinder cover (3) has a shape that fits into the piston opening. The parts of the The piston and the cylinder cover, which are almost touching each other, ωβηη the piston is in top dead center, are in the outer layers with a catalytic material (9,10) Mistake.

This device is preferably designed so that each such a device with the outlet opening (6) in the suction part (11) of each cylinder of an internal combustion engine protrudes. It is advantageous if the internal combustion engine is designed so that a stratified charge is possible. An embodiment is shown in FIGS.

The inlet valve (14) is located above a part (23) of the combustion chamber of an internal combustion engine. In this Part is also the opening for the spark plug (13). The part (23) is not above the actual one Cylinder space, but is laterally v / pushed. Above the actual cylinder space is the

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Combustion chamber (19) leading to the combustion chamber (23) etiua on the Point (20) has a constriction. The engine is provided with the usual components. (12) is the inlet port, (17) the exhaust port. The cylinder head (16), which is also the exhaust valve, is screwed onto the cylinder (18) (15) contains.

The rectification for the preparation of the fuel is working as follows:

If the piston (2) is in the area of the bottom dead center, it sucks in fuel via the opening (7), which is in a carrier gas and is preferably metered via a carburetor. Exhaust gas is used as the carrier, but so much combustion air is added to it that approx. 3 % of the fuel can burn by means of accumulated oxygen and by applying pressure and catalytic converters. When the piston moves upwards, the fuel is vaporized as a result of pressure and heating, which further increases the pressure. The compressed gas under high pressure is surrounded on all sides near the top dead center of the piston by the catalytic converters (9, 10), which have the effect that approx. 3 % of the fuel burns with the accumulated oxygen, thereby further increasing the temperature and now a high-quality fuel gas is created from the fuel vapor.

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In the area of the top dead center of the piston (2) arises a connection between the slot in the piston and the cylinder opening (8). The one under high pressure Gas is now blown into the catalytic converter (5). In this Catalyst, the conversion process is continued, so that a stable, high-quality fuel gas flows out at the outlet (6).

The generation of this gas according to the invention can be various Fuels are taken. Among other things, gasoline, kerosene or diesel oil can be used.

The simplest application of this device according to the invention is that a guide cylinder device with the same or higher speed than that of the internal combustion engine the gas produced in the central intake manifold a Internal combustion engine blows in »A more effective device in addition to the creation of a poison gas-free engine is that each cylinder of an internal combustion engine a cylinder of the device according to the invention with a catalyst is assigned.

In this case the device runs at half the speed of the internal combustion engine. The height of the slot in the piston and the opening (8) in the cylinder (i) is planned so that the Time of blowing fuel gas over the catalytic converter (5)

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happens through the opening (6) at a time when the intake valve (14) of the internal combustion engine is open. In the case of an IKlotor with stratified charge according to the construction shown in FIG. 2, the blow-in moment through the opening (6) is only about 20 % of the total time of the opening of the inlet valve. This time is entered in FIG. The inlet valve opens and closes from the beginning (21) to the end (22) with a crank angle of approx. 240 °. This opening time is entered as 100 % . In the first 60 % no fuel gas is blown in via the opening (6). The gas is only injected in the range from 60 to BO %.

This achieves the following: The internal combustion engine sucks first pure combustion air and only in the latter part becomes fuel gas added to this combustion air. Since the combustion chamber consists of 2 parts (19, 23) with a constriction (20), it is necessary achieves that the essential part of the combustion air, which is provided with the combustion gas, remains in the combustion chamber (23). The spark plug (13) is located in this part of the combustion chamber, which always depends on the design of the internal combustion engine an ignitable mixture is deposited. In the remaining area of the combustion chamber (19) there is pure combustion air to the tail, which is somewhat provided with fuel gas in the edge zone to the combustion chamber (23).

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A fuel-air mixture composed in this way is included very high excess of combustion air, e.g. λ 1.4 to 1.8 always ignitable and combustible, as the mixture in the area of the candle is composed of λ 1. So it will be fine a combustion if gasoline is used as fuel with an excess of oxygen that contains little CO. An improvement of this device consists in the conversion of the liquid fuel into a high octane value Gas. This has the following additional advantages:

1.) Combustion of the gas with stratified charge produces an absolutely CO-free exhaust gas.

2.) The CH values are so low that they have become more severe Regulations for the low-poison gas plant are met.

3.) The combustion of gas is already very beneficial in itself little NO. As a result of a delay in combustion and thus lower peak pressure according to the one described here In the system of stratified charge, the NO formation is reduced to such an extent that the determination is also made in this proportion of the low-toxic engine is fulfilled.

4.) As a result of the preparation of the fuel by means of pressure, Fuel combustion and catalytic converters are gas in the combustion chamber just a few seconds after the cold start

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. blown in. This means that the so-called cold start phase, in which evaporated fuel is blown in, is very short and thus also the exhaust gas values in the cold start phase are very good «This is done with the other bodies without the combination of pressure and catalyst not achieved in such a short time.

5.) The conversion of the fuel into high octane values Gas, as well as the use of a stratified charge, allow the compression to be increased, which leads to the Fuel consumption is greatly reduced. An engine with the device according to the invention has consumption values that correspond to the vehicle diesel engine.

It is therefore very economical in terms of construction and fuel economy Solution for the poison gas-free fflotor.

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Claims (4)

Reference. Dr. hc Dipl.Ing. Paul August,
Capellades 1, Bardelona 6 / Spain Claims .j device for processing won.liquid fuel for Supply won internal combustion engines that atomize with a gas serving as a carrier to form a non-ignitable mixture ujird, which takes place as part of a cleavage process using a catalyst is guided with the supply of heat and then introduced into the intake duct of the internal combustion engine, characterized in that the mixture before being introduced into the heated catalyst in a compressor with piston (2) is highly compressed, which is connected to the internal combustion engine that the The fuel gas is blown out for a period of time. 709845/0015 Telephone Telegraph: Office hours: Bank accounts: Postal check account: Lindau (08382) 6917 054374 by appointment Bayer. Vereinsbank Lindau (B) No. 1208578 Munich 295 25-809 Bayer-Hypotheken-U-Wechsel -Bank Lindau (B) No. 278920 is found in the second part of the opening hours of the associated Inlet valve (14) is located. 2. Apparatus according to claim 1, characterized in that this period is approximately 20 % of the total opening time of the inlet valve and ettua begins after 60 % of the opening time. 3. Device according to one of claims 1 or 2, characterized in that in the area high load to full load of the internal combustion engine, the injection time through the opening (6) in the direction of the start of opening of the inlet valve is shifted. 4. Device according to one of claims 1 to 3, characterized in that in the area of high load to full load, the time the blowing out through the opening (6) is extended by 20 % of the opening time of the inlet valve. 709845/0015