CN210135014U - Exhaust emission control system - Google Patents
Exhaust emission control system Download PDFInfo
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- CN210135014U CN210135014U CN201920419563.2U CN201920419563U CN210135014U CN 210135014 U CN210135014 U CN 210135014U CN 201920419563 U CN201920419563 U CN 201920419563U CN 210135014 U CN210135014 U CN 210135014U
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- impeller
- supercharging
- energy recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model provides an exhaust emission control system, this system is: the first bypass pipeline is communicated with a main pipeline at the pressure end of the turbocharged engine, and the second bypass pipeline is communicated with a main pipeline at the vortex end. A first throttle valve is arranged in the first bypass pipeline, and a third throttle valve is arranged in the main pipeline at the pressure end. A fourth throttle valve is provided in the second bypass line. A second throttle valve is arranged in the main pipeline of the vortex end. And a supercharging device communicated with the first bypass pipeline and a supercharging and energy recovery device communicated with the second bypass pipeline are respectively arranged. The control motor is connected with the supercharging device, the supercharging and energy recovery device, the first throttle valve, the second throttle valve, the third throttle valve and the fourth throttle valve. The exhaust emission temperature is controlled and energy recovery is performed by controlling the opening of the throttle valve and controlling the states of the supercharging device and the supercharging and energy recovery device.
Description
Technical Field
The utility model relates to the technical field of engines, concretely relates to exhaust emission control system.
Background
With the development of society, the environmental protection problem becomes one of the focus problems concerned by various industries at present. For the engine industry, it is required that the exhaust gas emitted from the engine meet the emission standards in order to protect the environment.
When the engine runs, exhaust gas is generated, and the after-treatment system reduces pollution components contained in the exhaust gas through a catalyst, so that the exhaust gas emitted by the engine meets the emission standard. The activity of the catalyst is of critical importance in the reduction of polluting constituents in the exhaust gases. At present, when an engine runs in a cold state, the exhaust temperature of the engine is slowly increased, and the activity of a catalyst is lower when the temperature is lower. Therefore, when the exhaust temperature of the engine rises slowly, the catalyst cannot effectively reduce the pollutant components in the exhaust gas, thereby causing the engine emissions to fail the emission standards.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides an exhaust emission control system to solve the problem that when the exhaust temperature of an engine rises slowly, a catalyst cannot effectively reduce the pollutant components in the exhaust gas, thereby causing the engine emission to be not in accordance with the emission standard.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
the embodiment of the utility model discloses exhaust emission control system is applied to turbocharged engine, the system includes:
the first bypass pipeline is arranged at the pressure end of the turbocharged engine and communicated with a main pipeline of the pressure end, and a first throttle valve is arranged in the first bypass pipeline;
a booster device is in communication with the first bypass line, a first impeller of the booster device being disposed in the first bypass line, the first throttle valve being located upstream of the first impeller;
the second bypass pipeline is arranged at the vortex end of the turbocharged engine and communicated with the main pipeline at the vortex end, and a fourth throttle valve is arranged in the second bypass pipeline;
the supercharging and energy recovery device is communicated with the second bypass pipeline, a second impeller of the supercharging and energy recovery device is arranged in the second bypass pipeline, and the fourth throttling valve is positioned at the downstream of the second impeller;
the turbocharger consists of a pressure end impeller and a vortex end impeller, wherein the pressure end impeller is arranged in a main pipeline of the pressure end, the vortex end impeller is arranged in the main pipeline of the vortex end, and the pressure end impeller and the vortex end impeller are connected through a transmission shaft;
arranging a third throttle valve in a main pipeline of the pressure end, wherein the third throttle valve is positioned at the upstream of the pressure end impeller;
providing a second choke in the main conduit of the vortex end, the second choke being downstream of the vortex end impeller;
a control motor in the turbocharged engine is respectively connected with the supercharging device, the supercharging and energy recovery device, the first throttle valve, the second throttle valve, the third throttle valve and the fourth throttle valve, controls the states of the supercharging device and the supercharging and energy recovery device, and controls the opening degrees of the first throttle valve, the second throttle valve, the third throttle valve and the fourth throttle valve.
Preferably, the exhaust emission control system further includes:
and the temperature sensor is arranged at the exhaust end of the turbocharged engine and is used for collecting the exhaust temperature.
Preferably, the exhaust emission control system further includes:
and the rotating speed sensor is arranged on one side of the turbocharger and is used for measuring the rotating speed of the turbocharger.
Preferably, the supercharging and energy recovery device comprises an impeller, and a generator and a motor respectively connected with the impeller.
Preferably, the supercharging device is an electric supercharger.
Based on the aforesaid the embodiment of the utility model provides a pair of exhaust emission control system, this system is: the first bypass pipeline is communicated with a main pipeline at the pressure end of the turbocharged engine, and the second bypass pipeline is communicated with a main pipeline at the vortex end. A first throttle valve is arranged in the first bypass pipeline, and a third throttle valve is arranged in the main pipeline at the pressure end. A fourth throttle valve is provided in the second bypass line. A second throttle valve is arranged in the main pipeline of the vortex end. And a supercharging device communicated with the first bypass pipeline and a supercharging and energy recovery device communicated with the second bypass pipeline are respectively arranged. The control motor is connected with the supercharging device, the supercharging and energy recovery device, the first throttle valve, the second throttle valve, the third throttle valve and the fourth throttle valve. In the scheme, the opening of each throttle valve is controlled, and the states of the supercharging device and the supercharging and energy recovery device are controlled, so that the exhaust gas emission temperature is controlled, and the energy recovery is carried out by using the discharged exhaust gas, thereby saving energy and quickly improving the activity of the catalyst.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an exhaust emission control system according to an embodiment of the present invention;
fig. 2 is a flowchart of an exhaust emission control method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents shown in the following embodiments are not limited to those required as a solution of the invention described in the claims.
As can be seen from the background, currently, when an engine is operated in a cold state, the exhaust temperature of the engine rises slowly, and when the temperature is low, the activity of the catalyst is also low. Therefore, when the exhaust temperature of the engine rises slowly, the catalyst cannot effectively reduce the pollutant components in the exhaust gas, thereby causing the engine emissions to fail the emission standards.
Therefore, the embodiment of the utility model provides an exhaust emission control system sets up the aperture of each choke valve in turbocharged engine through control to and control supercharging device and pressure boost and energy recuperation device's state, thereby control exhaust emission temperature and utilize the waste gas of emission to carry out energy recuperation, with improve exhaust emission temperature fast and energy saving.
Referring to fig. 1, a schematic structural diagram of an exhaust emission control system provided by an embodiment of the present invention is shown, the exhaust emission control system is applied to a turbocharged engine, and the exhaust emission control system includes:
in the embodiment of the present invention, the first bypass pipeline 300, which is disposed at the pressure end of the turbocharged engine and is communicated with the main pipeline 100 at the pressure end, is disposed in the first bypass pipeline 300, and the first throttle valve 301 is disposed therein.
In a specific implementation, the first throttle valve 301 is specifically provided at the intake end in the first bypass line 300.
In the embodiment of the present invention, the supercharging device 500 communicates with the first bypass line 300, the first impeller of the supercharging device 500 is disposed in the first bypass line 300, and the first throttle valve 301 is located upstream of the first impeller.
In a specific implementation, the first impeller is specifically disposed at the air outlet end of the first bypass pipeline 300.
It should be noted that. The upstream and downstream involved in the embodiments of the present invention are determined according to the flow direction of the gas.
It should be noted that the supercharging apparatus 500 at least includes the first impeller and a supercharging device, and the supercharging device is disposed outside the first bypass line 300 and connected to the first impeller through a transmission shaft.
Preferably, the boosting device 500 is an electric booster.
In the embodiment of the present invention, the second bypass pipeline 400 is disposed at the vortex end of the turbocharged engine, and is communicated with the main pipeline 200 at the vortex end, and the fourth throttle valve 401 is disposed in the second bypass pipeline 400.
In the embodiment of the present invention, the supercharging and energy recovery apparatus 600 communicates with the second bypass line 400, the second impeller of the supercharging and energy recovery apparatus 600 is disposed in the second bypass line 400, and the fourth throttle valve 401 is located at the downstream of the second impeller.
In a specific implementation, the second impeller is specifically disposed at the air outlet end of the second bypass pipeline 400, and the fourth throttle valve 401 is specifically disposed at the air outlet end of the second bypass pipeline 400.
Alternatively, the first and second electrodes may be,
the second impeller is specifically disposed at an air inlet end of the second bypass line 400, and the fourth throttle valve 401 is specifically disposed at the air inlet end of the second bypass line 400.
The supercharging and energy recovery apparatus 600 has a supercharging function and an energy recovery function, and the supercharging and energy recovery apparatus 600 includes: the device comprises an impeller, a generator and a motor, wherein the generator and the motor are respectively connected with the impeller. When the supercharging and energy recovery device 600 realizes the supercharging function, the impeller drives the motor to work, and the gas supercharging function is realized. When the supercharging and energy recovery device 600 realizes the energy recovery function, the impeller rotates and simultaneously drives the generator to work, so that the energy recovery is realized.
It should be noted that the generator and the motor are disposed outside the second bypass line 400, and the generator and the motor are connected to the impeller through a transmission shaft.
In an embodiment of the present invention, the turbocharger is composed of a pressure end impeller and a vortex end impeller, wherein the pressure end impeller is disposed in the main pipeline 100 of the pressure end, the vortex end impeller is disposed in the main pipeline 200 of the vortex end, and the pressure end impeller and the vortex end impeller are connected through a transmission shaft.
In a specific implementation, the turbocharger is integrally formed of two impellers and a drive shaft connecting the two impellers. One impeller of the turbocharger is disposed in the pressure-side main pipe 100, referred to as a pressure-side impeller, and the other impeller of the turbocharger is disposed in the vortex-side main pipe 200, referred to as a vortex-side impeller.
In the embodiment of the present invention, a third throttle 101 is disposed in the main pipeline 100 of the pressure end, and the third throttle 101 is located upstream of the pressure end impeller.
In a specific implementation, the pressure end impeller is specifically disposed at an air inlet end of the pressure end main pipeline 100, and the third throttle valve 101 is specifically disposed at the air inlet end of the pressure end main pipeline 100. In the embodiment of the present invention, a second throttle valve 201 is disposed in the main pipeline 200 of the turbine, and the second throttle valve 201 is located downstream of the turbine impeller.
In a specific implementation, the turbine-end impeller is specifically disposed at an air outlet end of the main pipeline 200 at the turbine end, and the second throttle valve 201 is specifically disposed at an air outlet end of the main pipeline 200 at the turbine end.
In the embodiment of the present invention, the control motor in the turbocharged engine is respectively connected to the supercharging device 500, the supercharging and energy recovery device 600, the first throttle 301, the second throttle 201, the third throttle 101, and the fourth throttle 401, and controls the supercharging device 500 and the state of the supercharging and energy recovery device 600, and controls the opening degree of the first throttle 301, the second throttle 201, the third throttle 101, and the fourth throttle 401.
In a specific implementation, the control motor controls the states of the supercharging device 500 and the supercharging and energy recovery device 600 and the opening degrees of the first throttle 301, the second throttle 201, the third throttle 101 and the fourth throttle 401 through a pre-stored control strategy.
Preferably, the exhaust emission control system further includes: and the temperature sensor is arranged at the exhaust end of the turbocharged engine and is used for collecting the exhaust temperature.
Preferably, the exhaust emission control system further includes: and the rotating speed sensor is arranged on one side of the turbocharger and is used for measuring the rotating speed of the turbocharger.
The embodiment of the utility model provides an in, through the other bypass pipeline that increases the correspondence of the main pipeline of the pressure end at turbocharged engine and whirlpool end to set up the choke valve in main pipeline and bypass pipeline respectively, and set up supercharging device and pressure boost and energy recuperation device with the bypass pipeline intercommunication. By controlling the opening of each throttle valve and controlling the states of the supercharging device and the supercharging and energy recovery device, the exhaust emission temperature is controlled and the energy recovery is carried out by using the discharged exhaust gas, so that the energy is effectively saved and the activity of the catalyst is rapidly improved.
Corresponding to the above description, referring to fig. 2, the embodiment of the present invention provides an exhaust emission control system, which shows a flowchart of an exhaust emission control method, where the exhaust emission control method is applicable to the exhaust emission control system, and the method includes the following steps:
step S201: the control motor determines the operating state of the turbocharged engine.
In the process of implementing step S201 specifically, the control motor determines the operating state of the turbocharged engine through a sensor provided in the turbocharged engine in advance. Wherein the operating state of the turbocharged engine includes, but is not limited to: turbocharged engines operate cold, the exhaust temperature of the turbocharged engine increases, and the turbocharger speed is too high.
Step S202: when the turbocharged engine works in a cold state, the control motor closes the second throttle valve and the third throttle valve to reach a first opening threshold value, opens the first throttle valve and the fourth throttle valve to reach a second opening threshold value, and starts the supercharging device and the supercharging and energy recovery device.
In the process of implementing step S202, the second throttle valve is closed to the first opening threshold, and the exhaust gas flow rate through the main line of the vortex end is reduced. And opening the fourth throttle valve to a second opening threshold value, increasing the flow rate of the waste gas passing through the second bypass pipeline, starting the pressurization and energy recovery device, applying work to the waste gas passing through the second bypass pipeline by utilizing the pressurization function of the pressurization and energy recovery device, and improving the temperature of the waste gas passing through the second bypass pipeline. And closing the third throttle valve to the first opening degree threshold value, and reducing the air inflow of the main pipeline of the low-pressure end. And opening the first throttle valve to the second opening threshold value, increasing the air inflow through a first bypass pipeline, starting the supercharging device, and supercharging the gas through the first bypass pipeline to meet the air inflow requirement of the turbocharged engine.
It should be noted that the first opening degree threshold and the second opening degree threshold are preset, and specific setting values are set by a technician according to the operating state of the turbocharged engine.
Step S203: when the exhaust temperature of the turbocharged engine rises, the control motor opens the second throttle valve and the third throttle valve to a third opening threshold value, closes the first throttle valve and the fourth throttle valve to a fourth opening threshold value, and adjusts the working states of the supercharging device and the supercharging and energy recovery device based on control parameters.
In the process of implementing step S203, when the exhaust temperature of the turbocharged engine increases, the exhaust temperature of the turbocharged engine needs to be controlled within a preset range so that the turbocharged engine operates normally. As can be seen from the above description of step S202, the exhaust emission temperature is raised by increasing the exhaust gas passing through the second bypass line and using the supercharging and energy recovery device to do work on the exhaust gas discharged from the turbocharged engine. Therefore, when the exhaust gas temperature of the turbocharged engine reaches a preset range, the opening degrees of the first throttle valve, the second throttle valve, the third throttle valve and the fourth throttle valve and the working states of the supercharging device and the supercharging and energy recovery device need to be controlled according to preset control parameters, so that the exhaust gas temperature of the turbocharged engine is controlled within the preset range, and the normal operation of the turbocharged engine is ensured.
It should be noted that the third opening threshold and the fourth opening threshold are preset, and specific setting values are set by a technician according to the operating state of the turbocharged engine.
Step S204: when the rotation speed of the turbocharger is higher than the rotation speed threshold value, the second throttle valve is closed to a fifth opening degree threshold value, the fourth throttle valve is opened to a sixth opening degree threshold value, and the supercharging and energy recovery device is started.
In a specific implementation, as can be seen from the disclosure of fig. 1 of the embodiment of the present invention, the turbocharger sensor is composed of a turbine end impeller and a pressure end impeller, and when the rotational speed of the turbine end impeller in the main pipeline of the turbine end is detected to be higher than a rotational speed threshold value through the rotational speed sensor, the rotational speed of the turbine end impeller needs to be reduced to below the threshold value. Therefore, by closing the second throttle valve to the fifth opening threshold, the flow rate of exhaust gas passing through the scroll-end impeller is reduced, thereby reducing the rotation speed of the scroll-end impeller. Opening the fourth throttle valve to the sixth opening threshold, discharging exhaust gas from the second bypass line, and simultaneously activating the energy recovery function of the supercharging and energy recovery apparatus. Since the supercharging and energy recovery apparatus is communicated with the second bypass line, the supercharging and energy recovery apparatus can perform energy recovery using the exhaust gas passing through the second bypass line.
The embodiment of the utility model provides an in, set up the aperture at each choke valve of turbocharged engine through control to and control supercharging device and pressure boost and energy recuperation device's state, thereby control exhaust emission temperature and utilize the waste gas of emission to carry out energy recuperation, effective energy saving and improve catalyst activity fast.
To sum up, the embodiment of the utility model provides an exhaust emission control system, this system is: the first bypass pipeline is communicated with a main pipeline at the pressure end of the turbocharged engine, and the second bypass pipeline is communicated with a main pipeline at the vortex end. A first throttle valve is arranged in the first bypass pipeline, and a third throttle valve is arranged in the main pipeline at the pressure end. A fourth throttle valve is provided in the second bypass line. A second throttle valve is arranged in the main pipeline of the vortex end. And a supercharging device communicated with the first bypass pipeline and a supercharging and energy recovery device communicated with the second bypass pipeline are respectively arranged. The control motor is connected with the supercharging device, the supercharging and energy recovery device, the first throttle valve, the second throttle valve, the third throttle valve and the fourth throttle valve. In the scheme, the opening of each throttle valve is controlled, and the states of the supercharging device and the supercharging and energy recovery device are controlled, so that the exhaust emission temperature is controlled, the energy recovery is carried out by using the discharged exhaust, the energy is effectively saved, and the activity of the catalyst is rapidly improved.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. An exhaust emission control system for a turbocharged engine, the system comprising:
the first bypass pipeline is arranged at the pressure end of the turbocharged engine and communicated with a main pipeline of the pressure end, and a first throttle valve is arranged in the first bypass pipeline;
a booster device is in communication with the first bypass line, a first impeller of the booster device being disposed in the first bypass line, the first throttle valve being located upstream of the first impeller;
the second bypass pipeline is arranged at the vortex end of the turbocharged engine and communicated with the main pipeline at the vortex end, and a fourth throttle valve is arranged in the second bypass pipeline;
the supercharging and energy recovery device is communicated with the second bypass pipeline, a second impeller of the supercharging and energy recovery device is arranged in the second bypass pipeline, and the fourth throttling valve is positioned at the downstream of the second impeller;
the turbocharger consists of a pressure end impeller and a vortex end impeller, wherein the pressure end impeller is arranged in a main pipeline of the pressure end, the vortex end impeller is arranged in the main pipeline of the vortex end, and the pressure end impeller and the vortex end impeller are connected through a transmission shaft;
arranging a third throttle valve in a main pipeline of the pressure end, wherein the third throttle valve is positioned at the upstream of the pressure end impeller;
providing a second choke in the main conduit of the vortex end, the second choke being downstream of the vortex end impeller;
a control motor in the turbocharged engine is respectively connected with the supercharging device, the supercharging and energy recovery device, the first throttle valve, the second throttle valve, the third throttle valve and the fourth throttle valve, controls the states of the supercharging device and the supercharging and energy recovery device, and controls the opening degrees of the first throttle valve, the second throttle valve, the third throttle valve and the fourth throttle valve.
2. The exhaust emission control system according to claim 1, further comprising:
and the temperature sensor is arranged at the exhaust end of the turbocharged engine and is used for collecting the exhaust temperature.
3. The exhaust emission control system according to claim 1, further comprising:
and the rotating speed sensor is arranged on one side of the turbocharger and is used for measuring the rotating speed of the turbocharger.
4. The exhaust emission control system of claim 1, wherein the boost and energy recovery device includes an impeller, a generator and a motor respectively connected to the impeller.
5. The exhaust emission control system of claim 1, wherein the boost device is an electric boost.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920419563.2U CN210135014U (en) | 2019-03-29 | 2019-03-29 | Exhaust emission control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920419563.2U CN210135014U (en) | 2019-03-29 | 2019-03-29 | Exhaust emission control system |
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| CN210135014U true CN210135014U (en) | 2020-03-10 |
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| CN201920419563.2U Active CN210135014U (en) | 2019-03-29 | 2019-03-29 | Exhaust emission control system |
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| CN (1) | CN210135014U (en) |
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