FR2688266A1 - APPARATUS FOR ELIMINATING FUME FROM EXHAUST GASES FOR A DIESEL ENGINE. - Google Patents

Abstract

The present invention provides a filter (4) driven in slow rotation in a housing (1). A certain number of pores (4a, 4a, ..) are made in the filter (4). The exhaust gases of a diesel engine are introduced into the housing (1), and evacuated to the outside from the pores (4a, 4a, ..) of the filter (4). At this time, the black smoke present in the exhaust gas adheres to the inner walls of the pores and clumps there, and when the pores (4a, 4a, ..) of the filter (4) rotate to be at the level of the pressurized air chamber (6), the agglutinated black smoke is detached from the pores (4a, 4a, ..) of the filter (4) by the force of the pressurized air supplied by a compressor, and is returned to at the same time as the air drawn into the diesel engine, to be burnt there.

Description

APPARATUS FOR ELIMINATING FUME FROM EXHAUST GASES

FOR A DIESEL ENGINE

  This invention relates to an apparatus for removing black smoke from exhaust gases for a diesel engine and, more particularly, to an apparatus for removing black smoke for eliminating

effectively black smoke.

  A large amount of black smoke, due to incomplete combustion, is present in the exhaust gases of a diesel engine. However, since this black smoke has particularly harmful effects on the organism of living beings, we have tried to suppress the production of black smoke in the engine itself but this is technically very difficult and,

  therefore, this problem is still not resolved.

  The technical problem to be solved therefore relates to an effective elimination of black smoke produced by a diesel engine, and an object of this invention consists in providing an apparatus for eliminating black smoke from exhaust gases for a diesel engine, which makes it possible to

  solve the problem described above.

  The present invention is intended to achieve the aim described above. An apparatus is provided for removing black smoke from exhaust gases for a diesel engine, comprising an exhaust gas pipe mounted longitudinally on one side of a cylindrical casing, an air intake duct mounted longitudinally on the other side of the casing and connected on one side to a motor, a filter having a number of pores formed in positions opposite to the exhaust gas pipe and to the intake duct and rotatably mounted in the housing, and a pressurized air supply device disposed on the side of the intake duct to supply pressurized air produced by a compressor

under pressure.

  Exhaust gases from a diesel engine are introduced into a crankcase via an exhaust gas pipe Exhaust gases are discharged outside from the other exhaust pipe , passing through the pores of the filter driven in slow rotation in the casing At this time, the black smoke (fine particles) included in the exhaust gases sticks to the pores of the filter and clumps there, and only the gases exhaust resulting from complete combustion are exhausted to the outside In addition, since the filter turns slowly, when it reaches the level of the intake duct side, on the other side, the black smoke agglutinated in the pores of the filter are forcibly separated due to the air sucked in by the intake duct which is put into the atmosphere The black smoke separated from the other intake duct connected to the diesel engine is brought back with the air to the diesel engine and burned back into the engine At this time, compressed air produced by a compressor is supplied under pressure to the intake duct, and consequently the black smoke which has gathered in the pores of the filter is almost entirely detached from the using pressurized air, brought under pressure from the other

  diesel engine intake pipe and burned.

  The characteristics and advantages of the invention

  will emerge from the detailed description which

  will follow, by way of example, with reference to the accompanying drawings, in which: FIG. 1 is a perspective view of an embodiment of an apparatus for eliminating black smoke for a diesel engine according to the present invention ; Figure 2 is a side view in longitudinal section of Figure 1; Figure 3 is a front view of a filter; Figure 4 is a perspective view of a pressurized air chamber, viewed from its right side; Figure 5 is a perspective view thereof, seen from its left side; and Figure 6 is a sectional view along line A-A

in Figure 5.

  An embodiment of the present invention will be described with reference to Figures 1 to 6 In the drawings, the reference 1 designates a housing The housing 1 has a cylindrical shape, and the exhaust gas pipes 2 and 2 are respectively mounted opposite each other, on the side of a front wall 1a and of a rear wall 1b of the casing In addition, intake ducts 3 and 3 are respectively mounted opposite the one on the other on the front wall 1a and the rear wall 1b, on the other side of the casing 1 Consequently, the exhaust gas pipes 2 and the intake ducts 3 are mounted, respectively, in positions relative of the front wall 1a and the rear wall 1b, according to a

linear direction.

  A filter 4, which can be driven in slow rotation along an internal peripheral surface of the casing 1, is mounted in a journal on a shaft 5 in the casing 1. In addition, a certain number of pores 4 a, 4 a are formed. at locations of the filter 4 opposite the exhaust gas pipes 2, 2 and the intake ducts 3, 3 in the longitudinal direction of the peripheral surface Consequently, the pores 4 a, 4 a, are not opposite both to the exhaust pipes 2, 2 and to the intake ducts 3, 3 when

filter rotation 4.

  The exhaust gas pipe 2 and the intake pipe 3 mounted on the side of the wall before the of the casing 1 are connected to a diesel engine (not shown), and the exhaust gas pipe 2 and the duct d intake 3 mounted on the side of the rear wall 1b of the casing 1 communicate with the atmosphere In addition, the intake ducts 3, 3 are designed so as to draw atmospheric air at high speed and to bring the air to the diesel engine Then, in order to increase the intake power of atmospheric air, a semi-circular pressurized air chamber 6 is mounted along the external surface of the intake duct 3 on the side opposite to the diesel engine Then, the pressurized air chamber 6 has, in the center, a pressurized air guide hole 6 a and is open at 6 a at the front surface A short pipe 7 projects from the center of the surface rear 6 c of the pressurized air chamber 6, and a hose 9 communicating with a compressor 8 follows the short pipe 7 In addition, a control valve and a timer 11 are mounted on the path of the hose 9 and are suitable for controlling the air supply

  under pressure supplied by the compressor 8.

  The pressurized air chamber 6 is in contact, by its curved internal surface, with approximately half of the side of the intake duct 3 projecting from the rear wall 1b of the casing 1, and it is fixed, by its upper surfaces and lower, on the rear wall lb of the casing 1 by means of bolts 12 and 12 In addition, a certain number of holes 13, 13, in the form of nozzles, are made in the rear wall lb of the casing 1, opposite of the open part 6 b of the front surface of the pressurized air guide hole 6 a of the pressurized air chamber 6 The holes 13, 13 have a semi-circular shape and, when the filter 4 is driven in rotation, the holes 13, 13 are present on the side where all the pores 4 a, 4 a pass, formed in the filter 4. The gas coming from the holes 13, 13 of the rear wall lb of the casing 1 is brought under pressure in a space 14 formed in the casing 1 The atmospheric air supplied by the intake duct 3 is also g uided towards the space 14, and the air is brought under pressure at the same time as the air under pressure to the pores 4 a, 4 a, of the filter 4 The open part 6 b of the front surface of the air chamber under pressure 6 is placed almost directly on the front surfaces of the pores 4 a, 4 a, of the filter 4 and the air under pressure in the pressurized air chamber 6 can be brought directly under pressure to the pores 4 a, 4 a, of the filter The space 14 is formed by a partition 15 and is sealed by means of a seal 16 A space 14 a, similar to the space 14, is also formed on the opposite side, and it is sealed by a seal 16 a The reference 16 b designates a seal placed on the internal peripheral surface of the casing 1, and the reference 17

indicates steps.

  As described above, the gases

  exhaust discharged by the diesel engine are introduced into the casing 1 via the exhaust gas pipe 2 The filter 4 is located in the casing 1, and a certain number of pores 4 a, 4 a, are formed at locations opposite the exhaust pipe 2, in the filter 4 Consequently, the exhaust gases introduced into the casing 1 are discharged from the other exhaust pipe 2, which communicates with the atmosphere, via pores 4 a, 4 a, from filter 4 to the atmosphere At this time, if black smoke resulting from incomplete combustion is present in the exhaust gases, black smoke adheres to the internal walls of pores 4 a, 4 a, of filter 4 and clumps there when black smoke tends to pass through pores 4 a, 4 a, of filter, and it

  is practically not discharged to the atmosphere.

  In addition, since the filter 4 is driven in slow rotation, the black smoke agglutinated on the pores 4 a, 4 a, of the filter 4 arrives at the positions of the intake ducts 3, 3 Thus, because the intake ducts 3, 3 suck atmospheric air at high speed, the black smoke agglutinated on the pores 4 a, 4 a, of the filter 4 is detached from the pores 4 a, 4 a, of the filter 4 by the force of l sucked air is brought back at the same time as the air sucked to the diesel engine via the intake duct 3 mounted on the wall before the of the casing 1, and is burned in the engine At this time, since the pressure of the air supplied by the intake duct 3 is low, it is considered that the black smoke agglutinated on the pores 4 a, 4 a, of the filter 4 cannot be detached In this case, compressed air supplied by the compressor 8 is brought to the pressurized air chamber 6, the pressurized air is supplied from the space 14 to the po res 4 a, 4 a, of the filter 4 and the black smoke stuck to the pores 4 a, 4 a, of the filter 4 is completely detached, brought back to the diesel engine via the intake duct

  3 on the other side, and is burnt in the engine.

  The above described operation is repeated again to burn the black smoke present in the exhaust gases

  of the diesel engine and for evacuation to the atmosphere.

  As a result, various kinds of pollution from black smoke can be avoided. This invention can also be applied to the elimination of smoke from

  fuel from a two-stroke engine.

  According to the present invention, as described in detail above in connection with its embodiment, the black smoke from the exhaust gases leaving the diesel engine is collected by means of the filter, the black smoke agglutinated on the filter is detached by pressurized air, drawn in, returned to the diesel engine and again burned in the engine Therefore, the black smoke pollution from the diesel engine exhaust can be avoided, which is a remarkable advantage. Although the invention has been particularly shown and described with reference to a preferred embodiment thereof, it will be readily understood by those skilled in the art that modifications in form and in details can be made without get out of the mind and

field of the invention.

Claims (5)

  1 Apparatus for eliminating black smoke from exhaust gases for a diesel engine, characterized in that it comprises an exhaust gas pipe (2) mounted longitudinally on one side of a cylindrical casing (1), a air intake duct (3) mounted longitudinally on the other side of said casing (1) and connected on one side to a motor, a filter (4) having a certain number of pores (4 a, 4 a,) formed in positions opposite to said exhaust gas pipe (2) and to said intake duct (3) and rotatably mounted in said housing (1), and a device for supplying pressurized air (10, 11 ) arranged on the side of the intake duct (3) to supply pressurized air   produced by a compressor (8) under pressure.   2 Apparatus according to claim 1, characterized in that said exhaust gas pipe (2) and said intake duct (3) are respectively arranged in relative positions of the front walls (la) and rear (lb)   of said casing (1), in a linear direction.   3 Apparatus according to any one of claims   1 and 2, characterized in that said exhaust gas pipe (2) and said intake duct (3) located on one side of said housing (1) are connected to said diesel engine, said exhaust gas pipe ( 2) and said intake duct (3) located opposite one another on the other side of said casing (1) communicating with the atmosphere, and said intake duct (3) being further clean sucking atmospheric air at high speed to supply air aspirated to the diesel engine.   4 Apparatus according to claim 1, characterized in that a pressurized air chamber (6), of substantially semi-circular shape, is mounted along the external surface of said intake duct (3), other side not connected to said diesel engine, so as to increase the air intake power of said intake duct (3), said pressurized air chamber (6) being further connected to said compressor (8), and the pressurized air from said compressor (8) being supplied directly under pressure to the pores (4a, 4a,) of said filter (4) by means of   said pressurized air chamber (6).