DE10219282A1 - Exhaust gas cleaner for diesel engines integrated in the silencer box. - Google Patents

Abstract

This exhaust gas cleaner for diesel engines has a two part housing (1.1/1.2) containing at least one lamp black filter cartridge (10.1) and at least one catalytic converter cartridge (20.1) and a tube (2/3/4) to pass the exhaust gas through the cartridges (10.1/20.1) which are fitted into a partition (5) in the divide between the two parts of the housing. The housing (1.1/1.2) can be opened to make the cartridges (10.2/20.1) accessible.

Description

The invention relates to devices for cleaning the exhaust gases from diesel engines according to the preamble of claim 1.

If the exhaust gases from diesel engines are to be cleaned, soot filter systems are used and / or catalysts required. The soot filter must be regenerated regularly and cleaned of ashes. The regeneration takes place during operation, ash cleaning in the workshop.

For cleaning in the workshop, it has turned out to be optimal if the Catalysts and the soot filter are designed as cartridges. The regeneration additional measures are required during operation. For the regeneration of the Soot filter, the soot has to be burned, due to the addition of heat and / or catalytically active additives. For the reduction of Nitrogen oxides in the catalysts are required in the form of ammonia aqueous urea solution is injected into the exhaust gas stream.

Since space is limited under the motor vehicles, it is known Integrate soot filter and catalytic converter into the silencer housing. It is make sure that the housing is not too large and voluminous, the pressure drops the exhaust gases are not too high and those for the evaporation of the urea solution required mixing section must not be too short.

The present invention is therefore based on the object of an exhaust system Specify the soot filter and catalyst in the muffler housing are integrated and at the same time fulfill the conditions just described become.

This object is achieved by a device with the features of Claim 1.

Thanks to the attachment of the soot filter and / or catalyst cartridges in one Partition wall and thanks to the positioning of this partition wall exactly on the  The separation point of the housing is all the end faces of the cartridges for cleaning purposes easily accessible with one hand. This will work in the Workshop significantly reduced and the cleaning result improved.

The simple disassembly and assembly of the cartridges is supported by the gas-tight plug-in connection to the flue gas permanently housed in the housing leading facilities, for example entrance cone, exit cone, Intermediate pipes etc.

The ends of the housing are advantageously V-shaped in the region of the separation point expanded and a V-band wrapped around the case connects the two Housing parts releasably together. Such a V-band has the advantage that it is the pulls the two housing parts together, with the sealing rings between the cartridges and the exhaust gas-carrying devices are compressed so that they can perform their sealing function.

The intermediate wall is preferably designed such that it opposes the housing External pressure supports. As a result, the housing always remains at the point of separation its shape.

Advantageously, the end face of the intermediate wall matches the ends of the V-shaped housing and the V-band presses the housing ends against the Partition. In this way, the production of the required gas tightness with a simple design of the partition as well as that corresponding ends of the housing parts possible.

According to one embodiment of the invention, the sealing rings are wire rings educated. Wire rings can withstand the pressure of closing the case yield, give in sufficiently.

In order to secure the sealing rings against axial displacement, according to one Development of the invention attached to the cartridge support rings.  

According to a preferred embodiment of the invention, the housing is part of a Muffler and the partition is acoustically active.

Based on the drawing, the invention in the form of an embodiment are explained. Show it

Fig. 1 a section of a longitudinal section through a two-part housing in the region of the parting plane and

Fig. 2 shows a partial oblique view of an intermediate wall with a soot filter and catalyst cartridge.

Fig. 1 shows a section of a two-part housing 1.1 , 1.2 , for example a silencer housing. A soot filter cartridge 10.1 and a catalyst cartridge 20.1 are integrated in the housing 1.1 , 1.2 .

Both cartridges 10.1 , 20.1 are fixed in an intermediate wall 5 , for. B. welded. The intermediate wall 5 has passages of the appropriate size. In the area of the parting plane between the two housing halves 1.1 , 1.2 , the ends 7.1 , 7.2 of the two housing parts are widened outward in a V-shape. The end face of the intermediate wall 5 is also suitably V-shaped. This makes it possible to connect the two housing halves 1.1 , 1.2 to the intermediate wall 5 with the aid of a V-band 6 which is folded around, the mechanical strength and the gas tightness being produced in one assembly process.

Furthermore, one recognizes in the interior of the two-part housing 1.1 , 1.2 a first tube 2 , which feeds the exhaust gas coming from the diesel engine to the soot filter cartridge 10.1 , a further tube 3 , which deflects the exhaust gas emerging from the soot filter cartridge 10.1 and feeds the catalyst cartridge 20.1 , and finally a third tube 4 , which forwards the catalytically detoxified exhaust gas emerging from the catalyst cartridge 20.1 . A simple mounting and dismounting of the cartridge 10.1 to enable 20.1 is provided in each case a plug connection between the tubes 2, 3, 4 and the cartridge 10.1, 20.1. For this purpose, the ends of the tubes are widened to accommodate a respective sealing ring 11 , 12 , 21 , 22 . In order to secure these sealing rings 11 , 12 , 21 , 22 against axial displacement, support rings 13 , 23 are provided on the cartridges 10.1 , 20.1 . The sealing rings 11 , 12 , 21 , 22 are preferably at least partially elastic, for example in the form of knitted wire rings, and are placed under pressure when the housing 1.1 , 1.2 is closed so that they can fulfill their sealing function.

Fig. 2 shows an oblique view of the intermediate wall 5 , here with two parallel soot filter cartridges 10.1 , 10.2 and two parallel catalyst cartridges 20.1 , 20.2 . It is understood that the number of parallel cartridges can be varied according to the size of the motor. Indicated can be seen the tubes 2, 3, 4, the diesel exhaust soot filter cartridges 10.1, perform 10.2, the filtered exhaust gas from the soot filter cartridges 10.1, 10.2 deflect the catalyst cartridge 20.1, 20.2, and finally forward the light emerging from the catalyst cartridge 20.1, 20.2 exhaust gas. The pipe 4 leading away the exhaust gases can be dispensed with if the unit consisting of partition 5 and cartridges 10.1 , 10.2 , 20.1 , 20.2 is integrated into the housing of a silencer. Here, the exhaust gases emerging from the catalyst cartridges can flow directly into a chamber of the silencer.

If the intermediate wall 5 is additionally designed such that it is acoustically active, for example by providing suitable perforations, the housing chamber, which receives the deflection pipes 3 , can also take on sound-absorbing tasks.

Claims (7)

1. Device for cleaning the exhaust gases from diesel engines, essentially comprising
an at least two-part housing ( 1.1 , 1.2 ),
therein at least one soot filter cartridge ( 10.1 , 10.2 ) and / or at least one catalyst cartridge ( 20.1 , 20.2 )
and means ( 2 , 3 , 4 ) for guiding the exhaust gases into, between and out of the cartridges ( 10 , 1 , 10.2 , 20.1 , 20.2 ),
the housing ( 1.1 , 1.2 ) must be opened so that the cartridges ( 10.1 , 10.2 , 20.1 , 20.2 ) are accessible for cleaning, characterized by the features:
the cartridges ( 10.1 , 10.2 , 20.1 , 20.2 ) are fastened in an intermediate wall ( 5 ),
Sealing rings ( 11 , 12 , 21 , 22 ) ensure a gas-tight plug connection between the cartridges ( 10.1 , 10.2 , 20.1 , 20.2 ) and the exhaust gas-carrying devices ( 2 , 3 , 4 ),
a dividing plane of the housing ( 1.1 , 1.2 ) lies in the area of the intermediate wall ( 5 ). 2. Device according to claim 1, characterized by the features:
the ends ( 7.1 , 7.2 ) of the housing ( 1.1 , 1.2 ) in the area of the parting plane are widened in a V-shape,
a V-band ( 6 ) connects the two housing parts ( 1.1 , 1.2 ). 3. Device according to one of claims 1 to 3, characterized by the feature:
the intermediate wall ( 5 ) supports the housing ( 1.1 , 1.2 ) against external pressure. 4. Apparatus according to claim 2 or 3, characterized by the feature:
the end face of the intermediate wall ( 5 ) is V-shaped to match the ends ( 7.1 , 7.2 ) of the housing ( 1.1 , 1.2 ),
the V-band ( 6 ) presses the housing ends ( 7.1 , 7.2 ) against the partition ( 5 ). 5. Device according to one of claims 1 to 4, characterized by the feature:
the sealing rings ( 11 , 12 , 21 , 22 ) are wire rings. 6. The device according to claim 5, characterized by the feature:
Support rings ( 13 , 23 ) secure the sealing rings ( 11 , 12 , 21 , 22 ) against axial displacement. 7. Device according to one of claims 1 to 6, characterized by the features:
the housing ( 1.1 , 1.2 ) is part of a silencer,
the partition ( 5 ) is acoustically active.