FR2607186A1 - Exhaust silencer including a postcombustion chamber, a device for filtering the burn residues, and air intakes - Google Patents

Abstract

Exhaust silencer, decreasing the level of harmful gases, comprising an anti-condensation chamber in which the burnt gases arrive from the engine, a nozzle in which the gases are made turbulent, this nozzle including inlets for atmospheric air, baffles and a chamber fitted with a hot source such as an electric coil where the air/exhaust gas mixture arriving via spray nozzles is burnt, the combustion gases leaving via other baffles.

Description

 The present invention aims to replace the previous patent of the silent exhaust pipe, and eliminate the rate of gas with harmful lead. This patent filed on July 30, I9, G, granted on I4 February I972, bearing the N 7028I75, valid for 20 years.

 This modified patent improves the burning and filtered process, strictly maintaining the description process filed on the previous patent.

 The object of the present invention is to eliminate unburnt gases before leaving the exhaust pipe, without adding chemical material or modifying the engine.

 Burning begins when the engine is started until the temperature reaches 300 degrees.

 If this temperature drops below 300 O the burner is automatically started in the pot by a pressure switch.

 The device according to the invention comprises an overheated anti-condensation chamber into which the burnt gases from the engine arrives, then a nozzle into which open co.zmuri -quant tubes with the exterior which provide a supply of pure air at the outlet of tyuère, a mixing chamber in which circulates the mixture of air and exhaust gases; baffles and a burning chamber in which sprinklers project the mixture onto a heat source, such as a red-heated coil, from which the burnt gases exit through baffles which reduce noise to exhaust.

 Cn thus obtains a complete post-combustion of the exhaust gases and a notable reduction in noise.

 There will be described in more detail hereinafter, by way of example, indicative and in no way limitative, ur cylindrical exhaust pipe according to the invention with reference to the attached drawing on which the figure I is a view in longitudinal section.

 Figures 2 and 3 are sectional views along II - II and partial along III - III of Figure I A.

 The pot itself comprises a double-walled cylinder (2) with insulating and anti-noise lining, such as glass fiber (3). The exhaust gases from the engine through the pipe (4) and shrouds the pot in its length in the direction of the arrows F to lead in the opposite direction into a hot chamber (5) art codensation, with inclined perforated plates I 2 and go through a tube (6) in the direction of the arrows-F 2 and F 3, from the inlet side of the pot to a frustoconical nozzle (7) where they come out er.

turbuience (arrow F4) in a chamber (9) receiving outside air intakes IC 2 in number for example: this mixture of burnt and unburnt gas crosses baffles I 3, and is distributed there by sprinklers I 4, in a chamber II, in which a hot source is provided, for example ur.e electric coil T 5
THE HARMFUL GAS FILTnE
The filter (PL4) fig, B 4 longitudinal section, 2nd part of the exhaust pipe.

The assembly of filters consists in eliminating the residues after burning of the hydrocarbons as well as the quantity of lead burnt. The rest of the nitrogen oxide exiting through the exhaust pipe passing through the filter to lose any harmful anti-pollution and anti-noise gas.

Filter description
to remove all of the nitrogen oxide it requires a quantity of pure air for a mixture to deposit the harmful agent passing through a quantity of calibrated coke and a filter fabric of nylon.

The filter assembly comprises a cylinder (FI) chamber containing a quantity of filter coke (F 5) calibrated at 5 mm, a separation screen (F 2) separation of the coke for a space between the grids (F 2 and F 5 ) for a space containing nylon filter fabrics. The gas deposits the harmful agent in the quantity of coke pushed through the nylon filter cloth into an expansion chamber (F 4) at the outlet.

An inspection plate (F 6) to visit the hull and the filter cloths to clean or change after several thousand Kn .;

A hub (F 7) joined to the outlet of the exhaust pipe the hub with nozzle channel has 4 nozzles (F 8) sucking the pure air and discharged with the nitrogen oxide residue in the mixing chamber (F 9) perforated. The mixed gas passing through a quantity of 5 mm calibrated filter coke is pushed through the nylon fabric which retains all the harmful gases.

An air intake bowl (F 10) with 4 holes (F 20) to cause air turbulence to cool the filter.

The bowl (F 10) with 4 arms support (F II) to assemble the filters with the exhaust.

Maintain the filter after several thousand km wash or change the coke or the nylon fabric according to the condition of the engine.

Claims (6)

 - CLAIMS  I - Silent exhaust reducing the rate of harmful gases, characterized in that it comprises an overheated anti-condensation chamber into which the burnt gases from the engine arrive, then a nozzle into which open tubes communicating with the exterior and which provide a supply of pure air at the outlet of the nozzle, a mixing chamber in which the mixture of air and exhaust gases circulates, baffles and a clutch chamber in which nozzles project the mixture onto a source heat, such as a red-heated coil, from which the arm gases exit through baffles damping the noise of the exhaust.  2 - Exhaust pipe following claim I, characterized in that the gas coming from the engine are directed through a tube as far as near the outlet of the pot from where they are led in the opposite direction through an anti-condensation chamber and a tubing to the entrance of the pot  where they emerge by nozzle, at the same time as fresh air in  A turbulence chamber, the mixture then being directed into a chamber  post-combustion and from there, through baffles, to the outlet of the pot.  3 - Exhaust according to claim I, characterized in  as regards post-combustion and carried out by a typical coil  MLLCHIPR, supplied by a current supply by thermo-mano-contact.  4 - Claim cavaciérisée by an independent 3F 4 filter  connected after the rear exhaust outlet to eliminate after  gas and lead burns harmful nitrogen oxide residues  5 - Claimed the process for feeding a large quantity  fresh air through a pipe (F7) with a nozzle channel has four nozzles  (28) sucking a large quantity of clean air and discharged into a room  mixture (F 9) perforated, pure air mixed with the nitrogen oxide residue  pushed back into a chamber (5) contains a quantity of calibrated shell  5 mMm approximately. The hull kept separated by a grid (2) of w. space  (2 and 3) location of a thickness of nylon filter cloth.  The gas decanted, filtered, trodden in an expansion chamber (4) at the sorie.  thousands of kilometers.  A covered plate (6) to change the filter elements after  escape A I.  bowl (10) the 4 support arms (II) to assemble with the pot  (I2) to produce air turbulence to cool the filter, the  6.- Claims an air intake bowl (F 10) with 4 holes