CN213953717U - Catalyst converter heating system and vehicle - Google Patents
Catalyst converter heating system and vehicle Download PDFInfo
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- CN213953717U CN213953717U CN202022841496.9U CN202022841496U CN213953717U CN 213953717 U CN213953717 U CN 213953717U CN 202022841496 U CN202022841496 U CN 202022841496U CN 213953717 U CN213953717 U CN 213953717U
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- catalyst
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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
- Y02T10/40—Engine management systems
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model provides a catalyst converter heating system and vehicle relates to vehicle technical field. The catalyst heating system comprises a part of an exhaust pipeline and a heating pipeline which forms a closed loop with the part of the exhaust pipeline, and also comprises a catalyst arranged on the exhaust pipeline, an exhaust pump and a heater which are arranged on the heating pipeline; before the engine is started, the heating system is started to enable the exhaust pump to be started to push gas in the heating pipeline to flow, and the gas heated by the heater flows to the exhaust pipeline and the catalyst. The utility model discloses catalyst converter heating system utilizes mobile high temperature gas heating catalyst converter carrier, can make the carrier intensification more even, improves the conversion efficiency of catalyst converter to discharging pollutants in the cold start stage.
Description
Technical Field
The utility model relates to the technical field of vehicles, especially, relate to a catalyst converter heating system and vehicle.
Background
Along with social development, the popularization rate of automobiles is increasing day by day, the emission of pollutants is further increased, the environmental pollution is more serious, and the requirements on the emission regulations of the automobiles are more and more strict. In order to realize energy conservation and emission reduction in China,
the engine will be encouraged to further reduce the emission pollutants. Most pollutants of the vehicle are in a cold start stage (before the catalyst does not reach the light-off temperature); shortening the catalyst light-off time can effectively and greatly reduce the vehicle emission. And for the whole vehicle enterprise, more manpower and material resources need to be invested, and research and development of new technology is carried out to reduce vehicle emission. At present, in order to shorten the light-off time of a catalytic converter, the following schemes are mainly adopted:
using an electrically heated metal catalyst support; this solution can further heat the flowing exhaust gas, and thus the carrier, only after the engine is started; the ignition time can be shortened within a certain range so as to achieve the purpose of reducing the emission; (some solutions may also coat a small amount of catalyst on the electrically heated plates to further shorten the light-off time). However, the gas heated by the scheme is directly discharged, cannot be recycled, increases energy loss, and has no scheme applied to a ceramic carrier. Still other catalyst supports are located as close to the engine exhaust (or supercharger outlet) as possible to reduce heat loss from the exhaust and thereby reduce catalyst light-off time. But the gas heated by the scheme is directly discharged and cannot be recycled, so that the energy loss is increased. In addition, a heat preservation device is additionally arranged between the exhaust outlet (or the outlet of the supercharger) and the inlet end face of the catalyst carrier, so that the temperature loss of exhaust gas reaching the carrier is minimized, and the light-off time of the catalyst is shortened. However, the technology has the problems that when the vehicle is cold started at low temperature and gas reaches the catalyst, the temperature is not high enough, so that the catalytic efficiency is low, and the exhaust pollution is serious.
SUMMERY OF THE UTILITY MODEL
An object of the first aspect of the utility model is to provide a catalyst heating system, the heating tail gas of solving among the prior art can not reuse, leads to energy loss's problem.
Another object of the first aspect of the present invention is to solve the problem of the prior art that the temperature of the exhaust gas reaching the catalyst at the time of cold start is not sufficient to cause environmental pollution of the exhaust gas discharged.
It is an object of a second aspect of the present invention to provide a vehicle comprising the above catalyst heating system.
In particular, the present invention provides, in a first aspect, a catalyst heating system disposed at an exhaust line of an engine, the catalyst heating system further including a catalyst disposed on the exhaust line, and an exhaust pump and a heater disposed on the heating line; before the engine is started, the heating system is started, so that the exhaust pump is started to push the gas in the heating pipeline to flow, and the gas heated by the heater flows to the exhaust pipeline and the catalyst.
Optionally, the system further comprises an accelerator pedal position sensor, a vehicle speed sensor, a battery level sensor and a controller; the controller is connected with the heater; the accelerator pedal position sensor, the vehicle speed sensor and the battery electric quantity sensor are all connected with the controller, so that the controller controls the heater to start and stop according to a position signal of an accelerator pedal detected by the accelerator pedal position sensor, a vehicle speed signal detected by the vehicle speed sensor and the electric quantity signal detected by the battery electric quantity sensor.
Optionally, the exhaust gas treatment device further comprises a temperature sensor arranged in the exhaust line after the catalyst and before the heating line inlet for detecting the temperature of the gas flowing through the catalyst.
Optionally, the temperature sensor is connected to the controller to transmit a detected temperature signal of the gas flowing through the catalyst to the controller.
Optionally, a control valve is further disposed at the heating pipeline, and the control valve is connected to the controller to control start and stop of the control valve according to the temperature signal detected by the temperature sensor.
Optionally, the control valve is a check valve, the check valve is connected to the controller to control start and stop of the check valve according to the temperature signal detected by the temperature sensor, and when the check valve is opened, a part of gas flowing out of an air outlet of the catalyst enters the heating pipeline, is heated by the heater, and then flows to the catalyst.
Optionally, the controller is further connected with the engine to control the start and stop of the engine according to the temperature signal detected by the temperature sensor.
In particular, the present invention also provides a vehicle comprising a catalyst heating system as described above.
The utility model discloses a catalyst converter heating system is through setting up the heating pipeline in catalyst converter department, and the gas in the heating pipeline gets back to catalyst converter department again after the heater heating, utilizes the high temperature gas heating catalyst converter carrier that flows, can make the carrier intensification more even, improves the conversion efficiency of catalyst converter to discharging pollutants.
The utility model discloses in, because heating pipeline and exhaust pipe have formed a loop, consequently, the gas that has passed through the catalyst converter can almost be whole be heated by heater circulation in entering into the heating pipeline to make the temperature of the gas of catalyst converter department rise fast, the temperature of catalyst converter risees also corresponding acceleration, can avoid heating the energy loss of back gas. Further, the utility model discloses a catalyst converter heating system is located outside the catalyst converter, and in the normal work of engine, not influenced by high temperature exhaust long-term corruption etc. prolong the heater life-span.
Further, the utility model discloses start catalyst converter heating system in advance before the engine intervenes, heat the catalyst converter, make the engine when interveneeing, the catalyst converter has reached the light-off temperature to reduce the emission of pollutant, reduce the exhaust gas polluted environment that the cold start of engine leads to because of the catalytic efficiency of gas temperature is low enough to lead to the catalyst converter.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural view of a catalyst heating system according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic block diagram of a catalyst heating system 100 according to an embodiment of the present invention. The catalyst heating system 100 of the present embodiment is provided at an exhaust line 102 of an engine 101. The catalyst heating system 100 of the present embodiment includes a portion of the exhaust line 102 and a heating line 103 forming a closed loop with the portion of the exhaust line 102, and the catalyst heating system 100 further includes a catalyst 10 disposed on the exhaust line 102, and an exhaust pump 90 and a heater 30 disposed on the heating line 103. Before the engine 101 is started, the heating system is turned on, so that the exhaust pump 90 pushes the gas in the heating pipeline 103 to flow, and the gas heated by the heater 30 flows to the exhaust pipeline 102 and the catalyst 10. The catalyst heating system 100 of the embodiment is provided with the heating pipeline 103 at the catalyst 10, gas in the heating pipeline 103 is heated by the heater 30 and then returns to the catalyst 10, and the flowing high-temperature gas is used for heating the catalyst 10 carrier, so that the temperature of the carrier is more uniformly increased, and the conversion efficiency of the catalyst 10 to the exhaust pollutants at the cold start stage is improved.
Specifically, before the engine 101 is started, the temperature of the catalyst 10 is not high enough to raise to the temperature at which the catalyst has a high conversion efficiency, so that the catalyst 10 is heated in advance, so that the temperature of the catalyst 10 is raised to the temperature of catalytic decomposition already at the time of starting the engine 101, thereby effectively improving the catalytic efficiency of the catalyst and reducing pollution.
Specifically, before the engine 101 is started, since the gas at the engine 101 does not flow, the gas of the heating line 103 is completely heated by the drive of the exhaust pump 90. Because the heating pipeline 103 and the exhaust pipeline 102 form a loop, almost all the gas passing through the catalyst 10 enters the heating pipeline 103 and is circularly heated by the heater 30, so that the temperature of the gas at the catalyst 10 is quickly increased, the temperature of the catalyst is correspondingly increased, and the energy loss of the heated gas can be avoided.
In addition, the catalyst heating system 100 of the present embodiment is located outside the catalyst 10, and is not affected by long-term corrosion of high-temperature exhaust gas and the like during normal operation of the engine 101, thereby extending the life of the heater 30.
As a specific embodiment of the present invention, the catalyst heating system 100 of the present embodiment may further include an accelerator pedal position sensor 40, a vehicle speed sensor 50, a battery level sensor 60, and a controller 70. The controller 70 is connected to the heater 30; the accelerator pedal position sensor 40, the vehicle speed sensor 50 and the battery power sensor 60 are all connected to the controller 70, so that the controller 70 controls the heater 30 to start and stop according to the position signal of the accelerator pedal detected by the accelerator pedal position sensor 40, the vehicle speed signal detected by the vehicle speed sensor 50 and the power signal detected by the battery power sensor 60.
In this embodiment, the controller 70 is connected to the accelerator pedal position sensor 40, the vehicle speed sensor 50, and the battery power sensor 60, and can control the start and stop of the heater 30 and the exhaust pump 90 according to the position signal of the accelerator pedal detected by the accelerator pedal position sensor 40, the vehicle speed signal detected by the vehicle speed sensor 50, and the power signal monitored by the battery power sensor 60. Catalyst heating system 100 is activated in advance of the time the system needs to generate power or to provide an auxiliary power output. The catalyst heating system 100 is started in advance before the engine 101 intervenes to heat the catalyst 10, so that the catalyst 10 reaches the ignition temperature when the engine 101 intervenes, and the emission of pollutants is reduced. Reducing the cold start of the engine 101 pollutes the environment with exhaust gas resulting from the low catalytic efficiency of the catalyst 10 caused by insufficient gas temperature and the temperature of the catalyst 10.
As a specific embodiment of the present invention, the catalyst heating system 100 of the present embodiment may further include a temperature sensor 80, the temperature sensor 80 being disposed in the exhaust pipe 102 behind the catalyst 10 and in front of the air inlet of the heating pipe 103 for detecting the temperature of the gas flowing through the catalyst 10. The temperature sensor 80 is connected to the controller 70 to transmit a detected temperature signal of the gas flowing through the catalyst 10 to the controller 70. The controller 70 is also connected to the engine 101 to control the start and stop of the engine 101 according to the temperature signal detected by the temperature sensor 80.
In this embodiment, since the temperature sensor 80 can detect the gas temperature signal, the start and stop of the heater 30 and the start and stop of the engine 101 can be controlled according to the temperature signal of the temperature sensor 80. In the actual operation process of the engine 101, before the engine 101 is involved, the catalyst 10 can reach the ignition temperature, so that high catalytic conversion efficiency is realized, and the emission of pollutants is effectively and greatly reduced.
In addition, in one embodiment, in a new energy vehicle in which the engine 101 only provides power generation, the controller 70 analyzes the power signal detected by the battery power sensor 60, the vehicle speed signal detected by the vehicle speed sensor 50, and the position signal monitored by the position sensor of the accelerator pedal, starts the catalyst heating system 100 in advance before power generation is required, and the controller 70 analyzes the temperature signal of the temperature sensor 80, determines that the standard value of the light-off of the catalyst 10 is reached, and then automatically starts the engine 101 to generate power.
In another embodiment, engine 101 provides a new energy vehicle that, in addition to generating electricity, needs to provide direct power output at high vehicle speeds, rapid acceleration, or other specific conditions. The vehicle is electrically driven in the starting and low-speed stages; in the electric driving stage, the controller 70 may control the catalyst heating system 100 to operate, so that the catalyst 10 reaches the light-off temperature, and the temperature in the catalyst 10 is controlled to be always above the light-off temperature; under special conditions of charging, rapid acceleration, high-speed running and the like, when the engine 101 is started, the catalyst 10 can be in a high conversion efficiency stage, so that the emission of pollutants is reduced.
In a specific embodiment, the heating pipeline 103 of the present embodiment is further provided with a control valve 20, and the control valve 20 is connected to the controller 70 to control the start and stop of the control valve 20 according to the temperature signal detected by the temperature sensor 80.
In a specific embodiment, the control valve 20 of the present embodiment is a check valve, and the check valve is connected to the controller 70 to control the on/off of the check valve according to the temperature signal detected by the temperature sensor 80, and when the check valve is opened, a gas portion flowing out from the gas outlet of the catalyst 10 enters the heating pipeline 103, is heated by the heater 30, and then flows to the catalyst 10.
The control valve 20 of the present embodiment is designed as a one-way valve so that the heating system allows gas circulation in the heating line 103 when activated, and prevents engine 101 exhaust gas from entering the heating line when the one-way valve 20 is closed. The order of the control valve 20, the exhaust pump 90 and the heater 30 on the heating line 103 of the present embodiment can be freely designed according to the actual situation.
The catalyst 10 in the present embodiment may be a ceramic carrier catalyst 10, or may be another carrier such as a metal carrier. In the event of insufficient engine 101 cabin space, a more distant chassis position may be selected for deployment. Without affecting light-off of the catalyst 10 while meeting existing emissions targets, or stricter emissions regulations in the future.
As a specific example of the present invention, the present embodiment also provides a vehicle that may include the above catalyst heating system 100. The vehicle with the catalyst heating system 100 is provided with the heating pipeline at the catalyst 10, before the engine 101 is started, the exhaust pump 90 is used for pushing the gas of the heating pipeline 103, so that the gas of the heating pipeline 103 enters the catalyst 10 after being heated by the heater 30, the carrier of the catalyst 10 is heated by the flowing high-temperature gas, the temperature rise of the carrier is more uniform, and the conversion efficiency of the catalyst 10 to the discharged pollutants is improved. In the actual running process of the engine 101, before the vehicle runs into the engine 101, the catalyst 10 can reach the ignition temperature, so that high catalytic conversion efficiency is realized, and the emission of pollutants is effectively and greatly reduced.
In addition, in the present embodiment, almost all the heated gas passing through the catalyst 10 enters the heating pipeline and then circulates back to the catalyst 10 through the heating pipeline, and the heating system can quickly raise the circulating gas to the highest temperature by using the circulating gas inside the catalyst 10, and can avoid the energy loss of the heated gas.
In addition, the catalyst heating system 100 of the present embodiment is located outside the catalyst 10, and is not affected by long-term corrosion of high-temperature exhaust gas and the like during normal operation of the engine 101, thereby extending the life of the heater 30.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.
Claims (8)
1. A catalyst heating system provided at an exhaust line of an engine, characterized by comprising a portion of the exhaust line and a heating line forming a closed loop with the portion of the exhaust line, the catalyst heating system further comprising a catalyst provided on the exhaust line and an exhaust pump and a heater provided on the heating line; before the engine is started, the heating system is started, so that the exhaust pump is started to push the gas in the heating pipeline to flow, and the gas heated by the heater flows to the exhaust pipeline and the catalyst.
2. Catalyst heating system according to claim 1,
the device also comprises an accelerator pedal position sensor, a vehicle speed sensor, a battery electric quantity sensor and a controller; the controller is connected with the heater; the accelerator pedal position sensor, the vehicle speed sensor and the battery electric quantity sensor are all connected with the controller, so that the controller controls the heater to start and stop according to a position signal of an accelerator pedal detected by the accelerator pedal position sensor, a vehicle speed signal detected by the vehicle speed sensor and the electric quantity signal detected by the battery electric quantity sensor.
3. Catalyst heating system according to claim 2,
the exhaust gas heating device further comprises a temperature sensor, wherein the temperature sensor is arranged in the exhaust pipeline, is positioned behind the catalyst and in front of the heating pipeline air inlet and is used for detecting the temperature of gas flowing through the catalyst.
4. Catalyst heating system according to claim 3,
the temperature sensor is connected with the controller to transmit a detected temperature signal of the gas flowing through the catalyst to the controller.
5. Catalyst heating system according to claim 3 or 4,
the heating pipeline is also provided with a control valve, and the control valve is connected with the controller so as to control the start and stop of the control valve according to the temperature signal detected by the temperature sensor.
6. Catalyst heating system according to claim 5,
the control valve is a one-way valve, the one-way valve is connected with the controller to control the start and stop of the one-way valve according to the temperature signal detected by the temperature sensor, and when the one-way valve is opened, part of gas flowing out of an air outlet of the catalyst enters the heating pipeline, is heated by the heater and then flows to the catalyst.
7. Catalyst heating system according to claim 3 or 4,
the controller is further connected with the engine to control the starting and stopping of the engine according to the temperature signal detected by the temperature sensor.
8. A vehicle characterized by comprising the catalyst heating system according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022841496.9U CN213953717U (en) | 2020-12-01 | 2020-12-01 | Catalyst converter heating system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022841496.9U CN213953717U (en) | 2020-12-01 | 2020-12-01 | Catalyst converter heating system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213953717U true CN213953717U (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022841496.9U Active CN213953717U (en) | 2020-12-01 | 2020-12-01 | Catalyst converter heating system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213953717U (en) |
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2020
- 2020-12-01 CN CN202022841496.9U patent/CN213953717U/en active Active
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