DE2127890A1 - Combustion chamber - Google Patents

Description

Dr. F. Zumstein Sr. - Dr. E. Asemann R. Koonigsberger - Phye. R. l-lolzbauer

Dr. F. Zumstein jun. Patent attorney "

8 Mönchen 2, Bräuhauittraß 4 / III

ETAT I ¹ EAIiCAIS 3328-71

Combustion chamber.

The invention relates to the combustion chambers,

which with a fuel so / ie at the same time with an oxygen-rich gas for combustion and with a for Mixture with the gases produced by the combustion, oxygen-poor gas are fed.

Of such combustion chambers, the.

Invention in particular, if not exclusively, such for heating the exhaust gases (gases poor in oxygen) of a with pre-compression fed by a turbo compressor unit Combustion engine, with the compressor running in parallel with the combustion engine and the combustion chamber (rich in oxygen Gas).

In a combustion chamber of the above type there is a risk that the combustion will become unstable and even cease completely if the ratio between the acidic quantity of gas and the quantity of acidic gas changes.

BADOR) GlNAt

- 2 - 3328-71

The invention aims to address this disadvantage

remedy and create a combustion chamber in v / olcherdie Combustion stable and dependent on the ratio between the oxygen deficient The amount of gas and the amount of oxygen-rich gas are independent is, it being understood that the latter is sufficient to be a stoichiometric or practically stoichioraetric Ensure mixture.

The combustion chamber according to the invention contains a flame tube, the closed end of which has at least one Fuel injector carries while its open end into one the gas mixture flows into the pipe supplying its point of use, wherein the flame tube has a number of axially displaced sections distributed on its circumference has arranged openings, and is characterized in that an outer jacket surrounds the flame tube and is closely connected to the open end of the same, with a first line with oxygen-rich gas in the vicinity of the closed end of the flame tube lying section of the jacket and a second line with low-oxygen gas the in the section lying near the open end of the flame tube of the coat feeds.

The ratio between the amount of oxygen-rich gas and the amount of gas poor in oxygen can then change change without the course of the combustion in the flame tube is disturbed, since in the through the outer jacket and the space bounded by the flame tube forms a separation zone between the oxygen-rich gas and the oxygen-poor gas, which shifts when this ratio changes

The invention is hereinafter referred to explained on the drawing by way of example.

Fig. 1 is a schematic section of a

designed according to a first embodiment of the invention combustion chamber.

Fig. 2 is a schematic sectional view of a

trained according to a second Aurdführungsform of the invention Combustion chamber.

Fig. 3 shows a pre-compression

fed, equipped with a combustion chamber according to the invention Diesel engine.

The one in Pig. 1 and 2 shown combustion chamber has a flame tube 1, the closed end 2 carries a fuel injector 3 while its open End 4 opens into a line feeding the gas mixture to its point of use.

If this combustion chamber is used to heat the

Exhaust gases from a turbo compressor unit 6 with? Orverclichtuiig fed'Diesel engine 5 is used, the open end 4 of the flame tube 1 opens directly into the distributor of the turbine 6a of the turbo compressor unit.

The flame tube 1 has a certain number

of 'openings 7, which are distributed over the circumference and in axially displaced sections are arranged.

An outer jacket 8 surrounds the flame tube

1 and adjoins the open end 4 of the same tightly.

A first line 9 also feeds from the

Compressor 6b of the turbo compressor unit fo incoming air the section of the jacket 8 located in the vicinity of the closed end 2 of the flame tube 1.

A second line 10 also feeds from the

Diesel engine 5 coming exhaust gases close to the open End 4 of the flame tube 1 lying section of the jacket 8. "■ - ■

Although the outer jacket 8 is the flame tube 1

can surround at the point of its closed end 2, it is expediently designed so that it is close to the Flame tube 1 at the point of the closed end of the same

2 connects «

In the embodiments shown in FIGS the first line 9 connects to the outer jacket 8 via a distribution space 11.

The second line 10 closes

of the embodiment shown in FIG. 1 to the outer jacket 8 via a distribution space 12.

However, this second line 10 can also be used in accordance with the embodiment shown in FIG

10 9 8 8 3/1115

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connect a rinrförr -ige luuamer! 3 via a distribution room 14, the chamber 13 adjoining the outer jacket 8. the agency its' .found adjacent to the open end 4 of the flame tube 1 ■ surrounds, being distributed on the circumference and in axially against each other displaced sections arranged openings 15 in the Wall of the outer jacket 8 are arranged, uik the passage of the G-a.se from the annular chamber 13 to the outer jacket 8 enable. This arrangement makes it possible to achieve a better distribution of the exhaust gases in the outer dumbbell 8.

The flame tube 1 is provided "between its focal zone 1a and 1b of its mixing zone with axial slots 16, cooled by air polygamy the walls of the mixing zone 1b.

Thanks to the training according to the invention fc, stable combustion takes place in the combustion chamber, which depends on the ratio between the amount of fuel gas and the Air volume is independent, although this ratio changes significantly in a diesel engine fed with pre-compression. ■

It is therefore possible to improve the performance of the

To calculate the compressor of the pre-compression unit solely as a function of the diesel engine and the stoichiometric combustion conditions in the combustion chamber, while the use of a conventional combustion chamber would have meant calculating the performance of the compressor with a considerable margin of safety in order to ensure combustion, which a ± e Large and thus the price of the pre-digestion unit would have increased.

109883/1 1 1 5

Claims (1)

- 5 ~~
ate η t requirements? 127890 Combustion chamber with a flame tube whose closed end carries at least one fuel injector. ,, while its open end in a the gas mixture of its point of use feeding line opens, wherein the flame tube a certain number of openings distributed over its circumference and arranged in axially displaced sections having, characterized in that an outer jacket (8) surrounds the flame tube (1) and adjoins the open end (4) of the same tightly, and that a first with oxygen-rich Gas-fed line (9) near the closed end (2) of the flame tube (1) and a second with low-oxygen Gas-fed line (10) is connected in the vicinity of the open end (4) of the flame tube (1). 2.) Combustion chamber according to claim 1, characterized characterized in that the outer jacket (8) is close to the flame tube (1) is connected near its closed end (2). 3 ·) combustion chamber according to claim 1 or 2, there ~ characterized in that the first line (9) is connected to the outer jacket (8) via a distribution space (11.) is. 4.) Combustion chamber according to one of the claims 1 to 3, characterized in that the second line (10) is connected to the outer jacket (8) via a distribution space (12) is. 5.) Combustion chamber according to one of the claims 1 to 3 3, characterized in that the second line (10) is connected to an annular chamber (13) via a distribution space (14), this chamber (13) being the outer jacket (8) surrounds at the point of its the open end (4) of the flame tube (1) adjacent sections, wherein on the Circumferentially distributed openings (15) in the walls of the outer jacket that are arranged in axially displaced sections (8) are designed for the passage of the gases from the annular chamber (13) into the outer jacket (8). 100883/1115 BATH δ.) Combustion chamber according to one of the claims 1 to 5, characterized in that the flame tube (1) has a Combustion zone (la) near its closed end and a kish zone (1b) in the vicinity of its open end, axial slots (16) being provided between the combustion zone (1a) and the mixing zone (1b). 7.) Internal combustion engine, v / elcher is fed with pre-compression by a turbo compressor unit, whose Compressor in parallel with the internal combustion engine and a combustion chamber designed according to one of claims 1 to 6 for heating feeds the exhaust gases from the engine. 109883/1115 ÖAD ORIGINAL Blank page c ι ϊ r- ι = ι