Device for controlling EGR (Exhaust Gas Recirculation) rate

Abstract

The device for controlling the EGR rate comprises a device body, the device body comprises a gas inlet pipeline, a gas exhaust pipeline, an ERG gas outlet pipeline, a gas control valve device and a stepping motor assembly, the gas inlet pipeline, the gas exhaust pipeline and the ERG gas outlet pipeline are of a smooth transition and integrated machining forming structure, the gas inlet pipeline is located at the left end of the gas exhaust pipeline, and the gas control valve device is located at the right end of the gas exhaust pipeline. The ERG gas outlet pipeline is located on the rear side of the joint of the gas inlet pipeline and the exhaust pipeline, the gas control valve device is installed in the gas inlet pipeline and the exhaust pipeline, the stepping motor assembly is installed at the top of the gas inlet pipeline and the top of the exhaust pipeline, the amount of tail gas entering an EGR system is effectively adjusted by accurately adjusting and controlling the angle of a butterfly valve, and therefore accurate control over the EGR rate is achieved. The fuel consumption is reduced; and the carbon emission is reduced. When the engine is in different working states, the position of the butterfly valve is adjusted according to requirements so as to control the amount of waste gas entering the EGR system, and then active control over the EGR rate is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust gas treatment of internal combustion engines, in particular to a device for controlling an EGR rate. Background Art

[0002] An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, internal combustion engines usually convert thermal energy into mechanical energy. The engine is applicable to power generation devices, and can also refer to the entire machine including the power device (such as gasoline engines, aircraft engines). The engine was first born in the UK, so the concept of engine also originated from English, and its original meaning refers to the "mechanical device that generates power."

[0003] The existing engine has the following defects:

[0004] At present, the EGR rate control of most engines relies on the opening of the EGR valve and increasing the vacuum of the engine intake system by increasing the closing angle of the mixing valve. This method has certain limitations. For example, due to the limitations of the EGR pipeline layout and the fluctuation of the engine back pressure, the amount of exhaust gas entering the EGR system is insufficient and cannot meet the engine's requirements for the EGR rate. Therefore, a solution is needed. Summary of the invention

[0005] An object of the present invention is to provide a device for controlling the EGR rate to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A device for controlling an EGR rate comprises a device body, wherein the device body comprises an intake duct, an exhaust duct, an ERG outlet duct, a gas control valve device and a stepper motor assembly, wherein the intake duct, the exhaust duct and the ERG outlet duct are smoothly transitioned and integrally processed structures, the intake duct is located at the right end of the exhaust duct, the ERG outlet duct is located at the rear side of the connection between the intake duct and the exhaust duct, the gas control valve device is installed inside the intake duct and the exhaust duct, and the stepper motor assembly is installed on the top of the intake duct and the exhaust duct.

[0008] As a preferred embodiment of the present invention, the air intake duct is in a cylindrical structure with an air intake channel opened inside the air intake duct, the exhaust duct is in a cylindrical structure with an exhaust channel opened inside the exhaust duct, the ERG air outlet duct is in a cylindrical structure with an ERG gas channel opened inside the ERG air outlet duct, and the air intake channel, exhaust channel and ERG gas channel are through-type structures.

[0009] As a preferred embodiment of the present invention, the right end of the intake pipe and the left end of the exhaust pipe are both provided with connecting flanges, and a group of the connecting flanges are respectively smoothly transitioned with the intake pipe and the exhaust pipe and are integrally processed and formed. The connecting flanges are in a circular ring structure, and two groups of flange fixing feet distributed in a circular and equidistant manner are provided on the outside of the connecting flange. The flange fixing feet are in an N-shaped structure, and flange fixing holes are opened on the surface of the flange fixing feet.

[0010] As a preferred embodiment of the present invention, the gas control valve device includes a rotating valve shaft and a guide valve plate, and the guide valve plate is provided with a group. The rotating valve shaft has a cylindrical structure, and a group of guide valve plates are respectively located at the left and right ends of the rotating valve shaft, and the guide valve plates have a circular or elliptical structure.

[0011] As a preferred embodiment of the present invention, an EGR flange is provided at the outer end of the ERG outlet pipe, the ERG outlet pipe and the EGR flange are smoothly transitioned and integrally processed and formed, the EGR flange is a diamond-shaped structure, and the left and right ends are arc-shaped structures, and a group of flange fixing holes distributed in a symmetrical manner are opened on the surface of the EGR flange.

[0012] As a preferred embodiment of the present invention, bearing mounting recesses are provided at the top and bottom of the connection between the intake duct and the exhaust duct. The bearing mounting recesses are cylindrical in structure and hollow inside.

[0013] As a preferred embodiment of the present invention, the bottom driving end of the stepper motor assembly is connected to the top of the rotating valve shaft.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In a device for controlling the EGR rate of the present invention, it is connected to the exhaust pipe through a connecting flange, and the stepper motor is used to accurately adjust the angle of the control butterfly valve to effectively adjust the amount of exhaust gas entering the EGR system, thereby realizing precise control of the EGR rate, which helps to optimize the performance of the engine under different working conditions, reduce fuel consumption and reduce carbon emissions. The device uses a stepper motor to adjust the angle of the control butterfly valve to achieve active control of the amount of exhaust gas entering the EGR system. In this way, it can be ensured that the engine can obtain the best EGR rate under various operating conditions, thereby achieving the effect of energy saving and emission reduction. The device controls the angle change of the butterfly valve through a stepper motor to achieve the functions of guiding, diverting and blocking the engine exhaust. When the engine is in different working conditions, the position of the butterfly valve is adjusted according to demand to control the amount of exhaust gas entering the EGR system, thereby realizing active control of the EGR rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall side structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the overall rear side structure of the present invention;

[0019] Figure 4 It is a schematic diagram of the drainage structure of the gas control valve device of the present invention;

[0020] Figure 5 It is a schematic diagram of the blocking structure of the gas control valve device of the present invention.

[0021] In the figure: 1. Device body; 2. Intake pipe; 3. Exhaust pipe; 4. ERG outlet pipe; 5. Gas control valve device; 6. Stepper motor assembly; 7. Intake channel; 8. Exhaust channel; 9. ERG gas channel; 10. Connecting flange; 11. Flange fixing foot; 12. Flange fixing hole; 13. Rotating valve shaft; 14. Guide valve plate; 15. EGR flange; 16. Bearing mounting recess. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-5 , the present invention provides a technical solution:

[0024] A device for controlling an EGR rate comprises a device body 1, wherein the device body 1 comprises an intake pipe 2, an exhaust pipe 3, an ERG outlet pipe 4, a gas control valve device 5 and a stepper motor assembly 6, wherein the intake pipe 2, the exhaust pipe 3 and the ERG outlet pipe 4 are smoothly transitioned and integrally processed structures, the intake pipe 2 is located at the left end of the exhaust pipe 3, the ERG outlet pipe 4 is located at the rear side of the connection between the intake pipe 2 and the exhaust pipe 3, the gas control valve device 5 is installed inside the intake pipe 2 and the exhaust pipe 3, and the stepper motor assembly 6 is installed on the top of the intake pipe 2 and the exhaust pipe 3.

[0025] As a preferred embodiment of the present invention, the air intake pipe 2 is in a cylindrical structure, an air intake channel 7 is provided inside the air intake pipe 2, the exhaust pipe 3 is in a cylindrical structure, an exhaust channel 8 is provided inside the exhaust pipe 3, the ERG air outlet pipe 4 is in a cylindrical structure, an ERG gas channel 9 is provided inside the ERG air outlet pipe 4, the air intake channel 7, the exhaust channel 8 and the ERG gas channel 9 are through-type structures, the gas can enter through the air intake pipe 2, and then through the guidance of the gas control valve device 5, the gas can be guided to the exhaust pipe 3 or the ERG air outlet pipe 4 for discharge.

[0026] As a preferred embodiment of the present invention, the right end of the intake pipe 2 and the left end of the exhaust pipe 3 are both provided with a connecting flange 10, and a group of the connecting flanges 10 are respectively smoothly transitioned with the intake pipe 2 and the exhaust pipe 3 and are integrally processed and formed. The connecting flange 10 is a circular ring structure, and two groups of flange fixing feet 11 distributed in a circular and equidistant manner are provided on the outside of the connecting flange 10. The flange fixing feet 11 are in an N-shaped structure, and flange fixing holes 12 are opened on the surface of the flange fixing feet 11. When the staff connects the intake pipe 2 and the exhaust pipe 3 with other pipes, the staff connects the external pipe equipped with the connecting flange 10 with the intake pipe 2 and the exhaust pipe 3, and then the flange fixing feet 11 on the connecting flange 10 can fit each other, and further the staff can install the bolts in the flange fixing holes 12 on the flange fixing feet 11, and further the right end of the intake pipe 2 and the exhaust pipe 3 can be connected to the external pipe through the connecting flange 10.

[0027] As a preferred embodiment of the present invention, the gas control valve device 5 includes a rotating valve shaft 13 and a guide valve plate 14, and the guide valve plate 14 is provided with a group. The rotating valve shaft 13 has a cylindrical structure, and a group of guide valve plates 14 are respectively located at the left and right ends of the rotating valve shaft 13. The guide valve plates 14 have a circular or elliptical structure. When guiding the internal gas, the rotating valve shaft 13 can be driven, so that the rotating valve seat 13 guides the gas through the guide valve plates 14 on the surface.

[0028] As a preferred embodiment of the present invention, an EGR flange 15 is provided at the outer end of the ERG outlet pipe 4. The ERG outlet pipe 4 and the EGR flange 15 are a smooth transition and integrally processed structure. The EGR flange 15 is a diamond-shaped structure, and the left and right ends are arc-shaped structures. A group of flange fixing holes 12 distributed in a symmetrical manner are opened on the surface of the EGR flange 15. When connecting the ERG outlet pipe 4, the staff connects the external pipe with the EGR flange 15 on the ERG outlet pipe 4 and the EGR flange 15 on the external pipe, and then the staff inserts bolts into the flange fixing holes 12 of the EGR flange 15 to achieve the purpose of connection.

[0029] As a preferred embodiment of the present invention, bearing mounting recesses 16 are provided at the top and bottom of the connection between the intake pipe 2 and the exhaust pipe 3. The bearing mounting recesses 16 are cylindrical in structure and hollow inside. The bearing mounting recesses 16 at the top and bottom of the connection between the intake pipe 2 and the exhaust pipe 3 are for facilitating the installation and limiting of the rotating valve shaft 13, thereby facilitating the gas control valve device 5 to adjust the gas flow direction.

[0030] As a preferred embodiment of the present invention, the bottom driving end of the stepper motor assembly 6 is connected to the top of the rotating valve shaft 13. When in use, the bottom driving end of the stepper motor assembly 6 rotates, and the bottom driving end of the stepper motor assembly 6 can drive the rotating valve shaft 13 to rotate, so that the rotating valve shaft 13 can adjust the gas flow direction through the guide valve plate 14.

[0031] Working principle: During operation, when the staff connects the air intake pipe 2 and the exhaust pipe 3 with other pipes, the staff will connect the external pipe installed with the connecting flange 10 with the air intake pipe 2 and the exhaust pipe 3, and then the flange fixing feet 11 on the connecting flange 10 can fit each other, and then the staff can install the bolts in the flange fixing holes 12 on the flange fixing feet 11, and then the right end of the air intake pipe 2 and the exhaust pipe 3 can be connected to the external pipe through the connecting flange 10. When connecting the ERG outlet pipe 4, the staff will connect the external pipe with the ERG outlet pipe 4 on the ERG outlet pipe 4. The GR flange 15 is connected to the EGR flange 15 on the external pipeline, and then the staff uses bolts to insert into the flange fixing holes 12 of the EGR flange 15 to achieve the purpose of connection. When in use, the gas can enter through the intake pipe 2, and then through the guidance of the gas control valve device 5 (the bottom driving end of the stepper motor assembly 6 rotates, and the bottom driving end of the stepper motor assembly 6 can drive the rotating valve shaft 13 to rotate, so that the rotating valve shaft 13 can adjust the gas flow direction through the guide valve plate 14), the gas can be guided to the exhaust pipe 3 or the ERG outlet pipe 4 for discharge.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for controlling EGR rate, characterized in that: The invention comprises a device body (1), wherein the device body (1) comprises an air intake pipe (2), an exhaust pipe (3), an ERG air outlet pipe (4), a gas control valve device (5) and a stepper motor assembly (6); the air intake pipe (2), the exhaust pipe (3) and the ERG air outlet pipe (4) are a smoothly transitioned and integrally processed structure; the air intake pipe (2) is located at the left end of the exhaust pipe (3); the ERG air outlet pipe (4) is located at the rear side of the connection between the air intake pipe (2) and the exhaust pipe (3); the gas control valve device (5) is installed inside the air intake pipe (2) and the exhaust pipe (3); and the stepper motor assembly (6) is installed on the top of the air intake pipe (2) and the exhaust pipe (3).

2. The device for controlling the EGR rate according to claim 1, characterized in that: The air intake pipe (2) is a cylindrical structure, an air intake channel (7) is provided inside the air intake pipe (2), the air exhaust pipe (3) is a cylindrical structure, an air exhaust channel (8) is provided inside the air exhaust pipe (3), the ERG air outlet pipe (4) is a cylindrical structure, an ERG gas channel (9) is provided inside the ERG air outlet pipe (4), and the air intake channel (7), the air exhaust channel (8) and the ERG gas channel (9) are of a through-type structure.

3. The device for controlling the EGR rate according to claim 1, characterized in that: The left end of the air intake pipe (2) and the right end of the exhaust pipe (3) are both provided with connecting flanges (10); a group of connecting flanges (10) are respectively connected to the air intake pipe (2) and the exhaust pipe (3) in a smooth transition and are integrally processed and formed; the connecting flanges (10) are in a circular ring-shaped structure; two groups of flange fixing feet (11) are arranged on the outside of the connecting flange (10) in a circular and equidistant manner; the flange fixing feet (11) are in an N-shaped structure; and flange fixing holes (12) are provided on the surface of the flange fixing feet (11).

4. The device for controlling the EGR rate according to claim 1, characterized in that: The gas control valve device (5) comprises a rotating valve shaft (13) and a guide valve plate (14), wherein a group of the guide valve plates (14) are provided, the rotating valve shaft (13) is in a cylindrical structure, a group of the guide valve plates (14) are respectively located at the left end and the right end of the rotating valve shaft (13), and the guide valve plates (14) are in a circular or elliptical structure.

5. The device for controlling the EGR rate according to claim 1, characterized in that: An EGR flange (15) is provided at the outer end of the ERG outlet pipe (4); the ERG outlet pipe (4) and the EGR flange (15) are smoothly transitioned and integrally formed structures; the EGR flange (15) is a diamond-shaped structure, and the left and right ends are arc-shaped structures; a group of flange fixing holes (12) distributed in a symmetrical manner are opened on the surface of the EGR flange (15).

6. The device for controlling the EGR rate according to claim 1, characterized in that: A bearing mounting recess (16) is provided at the top and bottom of the connection between the air intake pipe (2) and the exhaust pipe (3); the bearing mounting recess (16) is a cylindrical structure with a hollow structure inside.

7. The device for controlling the EGR rate according to claim 4, characterized in that: The bottom driving end of the stepping motor assembly (6) is connected to the top of the rotating valve shaft (13).

Images