JPH074860U - Exhaust smoke reduction device for diesel engine - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention aims to significantly reduce exhaust smoke of a diesel engine. The exhaust smoke reducing apparatus for a diesel engine of the present invention is a smoke remover 3,10,1 in which the exhaust pipes 2,102,202 of the diesel engine 1 are filled with a smoke removing material.
03, 110, 203, 210 are provided, and the cross-sectional area of the smoke remover is formed larger than the cross-sectional area of the exhaust pipe. Further, the recirculation pipes 11a, 11b, 111a, 111b are branched from the exhaust pipe downstream of the smoke remover, the recirculation pipe is connected to the intake pipes 18, 118 of the diesel engine 1, and the blowers 13, 113 are connected to the recirculation pipe. However, the blower may be driven by the motors 14 and 114 to circulate a part of the exhaust gas of the diesel engine 1.

Description

[Detailed description of the device]

The present invention relates to an exhaust smoke reduction device that reduces the amount of exhaust smoke emitted from a diesel engine.

[0002]

[Industrial applications]

[0003]

[Prior art]

 Conventionally, exhaust smoke reduction devices for diesel engines have been of a wet type or a dry type, and the dry type has collected smoke with a filter.

[0004]

[Problems to be solved by the device]

 However, the dry exhaust smoke reduction device has a low filtration rate, and is not yet sufficient especially for the large amount of smoke generated during acceleration. Also, when a diesel vehicle goes in or out of a hazardous material handling place such as a petroleum base, a spark extinguisher made of wire mesh or the like must be attached to the end of the exhaust pipe, which makes it difficult to attach and detach the spark extinguisher. It was

Therefore, the present invention aims to significantly reduce the exhaust smoke of a diesel engine and save the time and effort to install a spark extinguisher.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a smoke remover in which an exhaust pipe of a diesel engine is filled with a smoke removing material, and the cross section of the smoke remover is formed to be larger than the cross-sectional area of the exhaust pipe. A reflux pipe is branched from an exhaust pipe downstream of the remover, the reflux pipe is connected to an intake pipe of a diesel engine, a blower is connected to the reflux pipe, and the blower is driven by a motor to drive the diesel engine. The gist is an exhaust smoke reduction device for a diesel engine, which is characterized by circulating a part of the exhaust gas of.

Further, the smoke remover may be filled with a chip-like metal, and the smoke remover may be provided with a portion capable of storing the smoke particles captured by the metal.

It is preferable that the motor is an air motor, an air conditioner press is connected to the output shaft of the diesel engine, and the air compressor drives the air motor.

Further, the motor is an air motor, and a connecting pipe for connecting the air motor and an air compressor equipped in the diesel engine can be provided, and the connecting pipe can be provided with a flow rate adjusting valve that works in conjunction with the accelerator.

Further, an exhaust pipe of a diesel engine is provided with a smoke remover in which chips, meshes or meshes of metal are filled, and the cross section of the smoke remover is formed to be larger than that of the exhaust pipe. It's just good.

[0011]

[Action]

 According to the present invention, since the smoke remover filled with the smoke remover is provided and the cross sectional area of the smoke remover is formed larger than the cross sectional area of the exhaust pipe, smoke particles are not blown by the wind pressure. Can accumulate on the bottom of the smoke remover. Since the reflux pipe is branched from the exhaust pipe downstream of the smoke remover to circulate a part of the exhaust gas, the number of times the exhaust gas passes through the smoke remover is increased and the absolute amount of exhaust gas itself Will be suppressed considerably, and the emission of smoke particles will decrease sharply. Also, because it can be easily installed by removing the muffler of a diesel vehicle, the effort and cost required to slightly improve the diesel vehicle currently in use, and also in the case of a new vehicle, exhaust smoke can be greatly reduced. Can be reduced to

Further, since the metal chips filled in the smoke remover collect smoke particles and the like, the smoke remover can be manufactured at an extremely low cost. In addition, the stored smoke particles and the like can be appropriately removed. When a diesel vehicle goes in or out of a hazardous material handling place such as an oil base, sparks generated in the exhaust pipe can be prevented by metal chips.

Since an air compressor is connected to the output shaft of the diesel engine and the air conditioner presser drives the air motor, the output of the diesel engine can be used as the power source of the air motor to save energy and exhaust gas. Smoke particles in the gas will be removed at a high rate.

Further, since the air motor and the air compressor equipped in the diesel engine are connected and the flow rate adjusting valve that interlocks with the accelerator is provided, the air motor is driven while the accelerator is operated, It is possible to very efficiently remove a large amount of smoke particles emitted during acceleration such as traveling uphill or starting, and it is also possible to reduce equipment costs.

Furthermore, smoke can be sufficiently reduced without performing exhaust gas recirculation. Since the chip-like metal has a high density, the smoke removal result is better than that of the stitch-like metal.

[0016]

【Example】

 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, smoke removers 3 and 10 are provided downstream of the exhaust pipe 2 of the diesel engine 1. The smoke remover 3 removes the muffler mounted on the exhaust pipe 2 of the diesel engine 1 and is placed instead of the muffler, and has a role of removing smoke and silencing. The smoke eliminator 3 shown in Fig. 2 consists of a hollow box-shaped housing made of iron and has a pentagonal cross section. Inside it, as a smoke eliminator, a thin iron machining chip (nonflammable Other materials such as chips, braids, or meshes may be used). This iron chip collects smoke particles, and the collected smoke particles are the bottom of the smoke remover 3. The smoke remover 3 silences the exhaust explosion noise as well as falls and accumulates. The front and rear walls are provided with an inlet 4 and an outlet 5, which are connected to the exhaust pipe 2, respectively, and the cross section of the smoke remover 3 is larger than the cross section of the exhaust pipe 2. A mounting part 7 made of a long iron plate having a T-shaped cross section is provided on an upper portion of the smoke remover 3, and is attached to a vehicle body frame with a bolt and a nut 6 so that the smoke remover 3 is hung on a vehicle body frame. It is supposed to be fixed. In addition, a rectangular hole is formed in the bottom surface of the smoke remover 3, and a cover plate 8 is detachably attached with a bolt and a nut so as to cover the hole. Particles etc. can be removed appropriately. Downstream of the smoke remover 3, a slightly smaller smoke remover 10 having the same structure as the smoke remover 3 is provided.

A recirculation pipe 11a having a diameter of 50 mm is diverged downstream of the smoke remover 10, and a regulating valve 12 for controlling the recirculation amount of exhaust gas is disposed at the divergence point. There is. In this embodiment, the exhaust gas recirculation amount is adjusted to 50% or less of the exhaust gas amount from the diesel engine 1. This is because if the recirculation amount exceeds 50%, the efficiency of the internal combustion engine 1 will be affected. The reflux pipe 11 a is connected to the inlet of the turbo blower 13, and the reflux pipe 11 b having a diameter of 75 mm connects the outlet of the turbo blower 13 to the intake pipe 18. The rotation shaft of the turbo blower 13 is interlocked with the rotation shaft of the air motor 14 via the belt 15. Therefore, the rotation of the air motor 14 is transmitted to the fan of the turbo blower 13 via the belt 15 and the fan is rotated. It rotates so that the exhaust gas recirculates. The air motor 14 is of a general-purpose oil bath type radial piston type and has a maximum rotation speed of 1500 rpm. p. m. The air compressor 16 is connected to the output shaft 17 of the diesel engine 1 so as to rotate synchronously with the diesel engine 1. Accordingly, the exhaust gas is stably recirculated from the exhaust pipe 2 to the intake pipe 18 through the recirculation pipes 11a and 11b, and a part of the exhaust gas passes through the smoke removers 3 and 4 more than once, Smoke particles and the like in the exhaust gas will be removed at a rate of about 75%. Further, since the exhaust gas is recirculated, the absolute amount of exhaust gas is reduced to about half, which reduces the absolute amount of smoke particles and the like.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, the air compressor 16 driven by the diesel engine 1 of the first embodiment is replaced by a brake air compressor 116 and an air tank 117, which are standard equipment for diesel vehicles, as a drive source for the air motor 114. Has become. As shown in the figure, a throttle valve 120 interlocking with the accelerator 119 is provided in the air pipe 121, and the opening degree of the throttle valve 120 increases as the pushing degree of the accelerator 119 increases, and the air flow rate of the air pipe 121 increases. And the number of revolutions of the air motor 114 is increased, so that the recirculation amount of the exhaust gas is increased. Therefore, while the axel 119 is being operated, the air supplied from the air pipe 121 drives the air motor 114 to recirculate the exhaust gas, and the air is discharged during acceleration such as traveling uphill or starting. The large amount of smoke particles can be removed very efficiently. Moreover, since the brake air compressor 116 that is standardly equipped in the diesel vehicle is used, the facility cost can be reduced. Note that the other configurations of the second embodiment are the same as those of the first embodiment, except that the numbers are changed to the hundreds, and the description thereof will be omitted.

Next, a third embodiment of FIG. 4 will be described. In the third embodiment, the exhaust gas recirculation of the first embodiment is not performed, and the smoke reducing devices 203 and 210 alone can exert the smoke reducing effect. In addition, the other structure of the third embodiment is the same as that of the first embodiment, except that the numbers are changed to the two hundreds series, and the description thereof is omitted.

It should be understood by those skilled in the art that the configuration of the present invention can be appropriately changed without departing from the scope of the present invention, and these changes are also included in the present invention. For example, in the example, the slender iron chips as the smoke removing material are filled in the smoke remover, but if the smoke remover can withstand the high temperature exhaust gas and remove the smoke particles, etc. Of course, the material is not limited to chips and may be chips or nets of other metals, organic substances, inorganic substances, or the like. Further, the motors are not limited to the air motors 14 and 114, and may be motors having other configurations such as a hydraulic motor or an electric motor. Further, the air motors 14 and 114 are not limited to the piston type, and needless to say, may have other structures such as a vane type, a gear type, and a turbine type. If an air tank connected to the air compressor 16 is provided, the air tank equalizes the pressure of the air discharged from the air compressor 16, so that the air motor 14 stabilizes the air discharged from the air tank as a power source. Thus, the air motor 14 can be stably rotated even if the rotation speed of the diesel engine 1 fluctuates. Further, instead of the small smoke removers 10, 110, 210, a harmful component remover containing a three-way catalyst for removing NOx and the like may be attached.

[0021]

[Effect of device]

 As described above, the present invention provides a smoke remover in which a smoke removing material is filled in the exhaust pipe of a diesel engine, and the smoke removing device is formed so that its cross-sectional area is larger than that of the exhaust pipe. Since a part of the exhaust gas of the diesel engine is circulated by branching the recirculation pipe from the exhaust pipe downstream of the exhaust gas, the exhaust gas is stably circulated to the intake pipe through the recirculation pipe from the exhaust pipe, and the exhaust gas By passing a part of the smoke through the smoke remover more than once, the smoke particles in the exhaust gas will be removed at a high rate. In addition, smoke particles and the like can be collected in the smoke remover without being blown off by wind pressure. Then, since a part of the exhaust gas is recirculated, the absolute amount of exhaust gas is reduced to a half quantile, which reduces the absolute emission amount of smoke particles and the like. In addition, it is possible to significantly reduce exhaust smoke with the effort and cost required to slightly improve the diesel vehicles currently in use, and also to equip new vehicles with easy design and low equipment cost. it can.

Further, since the metal chips filled in the smoke remover collect smoke particles and the like, an extremely inexpensive smoke remover can be manufactured, and the stored smoke particles and the like can be appropriately removed. When a diesel vehicle goes in or out of a hazardous material handling place such as an oil base, sparks generated in the exhaust pipe can be prevented by metal chips, and there is no trouble of installing a special spark extinguishing device to the exhaust pipe. .

Since an air compressor is connected to the output shaft of the diesel engine and the air conditioner presser drives the air motor, the output of the diesel engine can be stably used as a power source of the air motor, resulting in energy saving. .

Further, since the air motor and the air compressor equipped in the diesel engine are connected and the flow rate adjusting valve that interlocks with the accelerator is provided, the air motor is driven to operate the exhaust gas while the accelerator is operated. As a result, the large amount of smoke particles emitted during acceleration such as when traveling uphill or starting the vehicle can be removed very efficiently, and the equipment cost can be reduced.

Further, the smoke reducing device filled with non-combustible chips, braids, or reticulated metals alone without exhaust gas recirculation can exert the smoke reducing effect, and the device can be downsized, and the equipment can be reduced. The cost can be further reduced.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of a first embodiment.

FIG. 2 is a perspective view of a smoke remover.

FIG. 3 is a schematic explanatory diagram of a second embodiment.

FIG. 4 is a schematic explanatory diagram of a third embodiment.

[Explanation of symbols]

1, 101, 201 Diesel engine 2, 102, 202 Exhaust pipe 3, 10, 103, 110, 203, 210 Smoke remover 4, 104, 204 Inlet 5, 105, 205 Outlet 7 Mounting part 8 Lid 11a, 11b, 111a , 111b Reflux pipe 12,112 Regulator valve 13,113,213 Turbo blower 14,114,214 Air motor 16,116,216 Air compressor 14 Output shaft 18,118,218 Intake pipe 119 Accelerator 120 Throttle valve

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F01N 3/02 ZAB 301 Z

Claims (5)

[Scope of utility model registration request] 1. A diesel engine exhaust pipe is provided with a smoke remover filled with a smoke removing material, and a cross sectional area of the smoke remover is formed to be larger than a cross sectional area of the exhaust pipe, and an exhaust pipe downstream of the smoke remover. To branch the recirculation pipe, connect the recirculation pipe to the intake pipe of the diesel engine, connect a blower to the recirculation pipe, and drive the blower with a motor to circulate a part of the exhaust gas of the diesel engine. An exhaust smoke reduction device for diesel engines characterized by the following features. 2. The diesel engine according to claim 1, wherein the smoke remover is filled with a chip-like metal, and a portion capable of storing the smoke particles trapped by the metal is formed in the smoke remover. Exhaust smoke reduction device for engines. 3. The exhaust gas of a diesel engine according to claim 1, wherein the motor is an air motor, an air compressor is connected to an output shaft of the diesel engine, and the air compressor drives the air motor. Smoke reduction device. 4. The motor is an air motor, and a connecting pipe is provided for connecting the air motor to an air compressor equipped in the diesel engine, and the connecting pipe is provided with a flow rate adjusting valve interlocking with an accelerator. An exhaust smoke reduction device for a diesel engine according to claim 1, wherein: 5. An exhaust pipe of a diesel engine is provided with a smoke remover filled with metal in the form of chips, braids or nets,
An exhaust smoke reduction device for a diesel engine, wherein the smoke remover has a cross-sectional area larger than that of an exhaust pipe.