Vehicle tail gas purification system and method and vehicle
By designing a vehicle exhaust purification system, using power battery packs and low-temperature plasma exhaust treatment equipment, the power transmission and conversion of electricity is dynamically adjusted according to the vehicle's power information, the problem of emissions of harmful substances in the exhaust of new energy vehicles is solved, and the efficient exhaust purification effect is achieved.
Patent Information
- Application Number
- CN202510375788.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2025-06-10
AI Technical Summary
The exhaust gas produced by new energy vehicles during engine operation contains harmful substances, such as carbon monoxide, nitrogen oxides and sulfur dioxide, which harms the environment and human health.
A vehicle exhaust purification system is designed, including a power battery pack, an energy transmission module, a switch control module, a conversion module, a exhaust purification module and a controller. By dynamically adjusting the transmission and conversion of electricity, the exhaust purification process is controlled based on the vehicle's power information, and the purification is carried out using low-temperature plasma exhaust treatment equipment.
Effectively purify vehicle exhaust, reduce emissions of harmful substances, and reduce harm to the environment and human health. It is suitable for extended-range and plug-in hybrid vehicles.
Smart Images
Figure CN120120127A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of vehicle exhaust gas treatment, and in particular to a vehicle exhaust gas purification system, method and vehicle. Background Art
[0002] With the transformation of the global energy structure and the enhancement of environmental protection awareness, the new energy vehicle industry has ushered in unprecedented development opportunities. In recent years, the domestic new energy vehicle market has shown explosive growth, especially extended-range and plug-in hybrid models, which have won the favor of consumers with their unique power systems and long driving ranges. However, the engine will still participate in the work and produce certain exhaust emissions, including carbon monoxide (CO), nitrogen oxides (NOx), sulfur dioxide (SO2) and other harmful substances, which pose a serious threat to the environment and human health.
[0003] Therefore, it is necessary to develop a new vehicle exhaust purification system, method and vehicle. Summary of the invention
[0004] The object of the present invention is to provide a vehicle exhaust purification system, method and vehicle, which can purify the exhaust gas of extended-range and plug-in hybrid vehicles.
[0005] In a first aspect, a vehicle exhaust purification system according to the present invention comprises: A power battery pack having a positive connection terminal and a negative connection terminal for providing electrical energy; An electric energy transmission module, connected to the positive electrode connection terminal and the negative electrode connection terminal of the power battery pack, and used for transmitting the electric energy provided by the power supply group; A switch control module, whose input end is connected to the output end of the power transmission module, and is used to control the on and off of the power transmission module; A conversion module, whose input end is connected to the output end of the switch control module, is used to realize the conversion and transmission of electric energy; An exhaust gas purification module, whose input end is connected to the output end of the conversion module; A controller, connected to the control ends of the switch control module and the conversion module respectively, for controlling the closing and opening of the switch control module according to the vehicle power information, and controlling the operating frequency and output pulse width of the conversion module based on the vehicle power information; Among them, the vehicle power information includes engine operating conditions and power battery status.
[0006] Optionally, the controller is configured to: Awakened and ready when the engine starts; Obtain vehicle power information; When it is confirmed that the vehicle power is normal, the controller is in an activated state, and the control switch control module is closed; Judge the exhaust emission situation according to the engine operating conditions, and control the working frequency and output pulse width of the conversion module based on the engine operating conditions and the power battery state. The controller is configured to be awakened and in a ready state when the engine starts, ensuring that the system can respond to the engine start in a timely manner and prepare for subsequent exhaust gas purification work. By obtaining the vehicle power information (such as the power battery state, engine operating conditions, etc.), the controller can comprehensively understand the current working state of the vehicle and provide a basis for subsequent control strategies. After confirming that the vehicle power is normal, the controller activates and controls the switch control module to close, enabling the electric energy to be smoothly transmitted to the conversion module and providing the required electric energy for the exhaust gas purification module. By real-time monitoring the engine operating conditions and the power battery state, the controller can dynamically adjust the working frequency and output pulse width of the conversion module, thereby optimizing the exhaust gas purification effect and ensuring the reasonable use of the power battery at the same time.
[0007] Optionally, the controller is further configured to: When it is judged that the power battery has sufficient power and the exhaust gas emission is large, increase the output power of the system; When the power battery has sufficient power and the exhaust gas emission is small, reduce the output power of the system; When the power battery has insufficient power, control the system to output the minimum power. When the power battery has sufficient power and the exhaust gas emission is large, increasing the system output power can more effectively purify the exhaust gas and meet higher environmental protection requirements. When the power battery has sufficient power but the exhaust gas emission is small, reducing the system output power can save electric energy and extend the service life of the power battery. When the power battery has insufficient power, controlling the system to output the minimum power can ensure the basic operation requirements of the vehicle and avoid excessive consumption of the electric energy of the power battery, thereby extending the vehicle's cruising range.
[0008] Optionally, the controller is further configured to: be in a sleep state when the engine is not started, and the system does not work. This can avoid consuming the electric energy of the power battery and extend the vehicle's cruising range.
[0009] Optionally, the exhaust gas purification module adopts a low-temperature plasma exhaust gas treatment device; the total voltage of the power battery pack is not less than 800V; the electric energy transmission module is a high-voltage DC bus; the positive connection end of the power battery pack is connected to the positive end of the high-voltage DC bus; the negative connection end of the power battery pack is connected to the negative end of the high-voltage DC bus. As a rapidly developing exhaust gas treatment device, the plasma exhaust gas treatment device has the characteristics of simultaneously treating multiple pollutants, no secondary pollution, and high purification rate, and can be well applied to the exhaust gas treatment of vehicles. Compared with the currently commonly used catalyst treatment scheme, it has the advantages of lower cost and better controllability. Adopting high voltage and a high-voltage DC bus can improve the electric energy transmission efficiency, reduce energy loss, and at the same time meet the requirements of the exhaust gas purification module for high voltage and high power.
[0010] Optionally, the switch control module includes a first switch and a second switch. The input end of the first switch is connected to the positive end of the high-voltage DC bus, and the input end of the second switch is connected to the negative end of the high-voltage DC bus; the output ends of the first switch and the second switch are connected to the input end of the conversion module. By controlling the positive end and the negative end of the high-voltage DC bus through two switches respectively, precise control and transmission of electric energy can be achieved, ensuring the stability and safety of the system.
[0011] Optionally, the conversion module includes: A full-bridge inverter circuit, including multiple bridge arm units, and used to output a first voltage; A pulse transformer, coupled to multiple first bridge arm units, and used to convert the first voltage into a second voltage. The combination of the full-bridge inverter circuit and the pulse transformer can achieve the conversion and boosting of electric energy, converting the DC electric energy provided by the power battery into high-voltage pulse electric energy suitable for use by the exhaust gas purification module.
[0012] Optionally, the full-bridge inverter circuit includes two bridge arm units, Both ends of the primary side of the pulse transformer are respectively connected to the midpoints of the two bridge arm units; The secondary side of the pulse transformer is used as the high-voltage pulse output end and is used to connect to the power supply end of the exhaust gas purification module. The combination of two bridge arm units and the pulse transformer can achieve efficient conversion and boosting of electric energy, while ensuring the stability and controllability of the output voltage. The secondary side of the pulse transformer outputs high-voltage pulse electric energy to provide the required electric energy for the exhaust gas purification module, ensuring its normal operation and effectively purifying the exhaust gas.
[0013] In a second aspect, a vehicle exhaust gas purification method according to the present invention adopts the vehicle exhaust gas purification system as described in the present invention, and its control method includes the following steps: Obtain the vehicle power information, including the power battery status and the engine working condition; Judge the power of the power battery based on the state of the power battery, and judge the tail gas emission based on the engine operating conditions; When the power of the power battery is sufficient and the tail gas emission is large, increase the output power of the system; when the power of the power battery is sufficient and the tail gas emission is small, reduce the output power of the system; when the power of the power battery is insufficient, control the system to output the minimum power.
[0014] Third invention, a vehicle according to the present invention adopts the vehicle tail gas purification system as described in the present invention.
[0015] Advantages of the present invention: 1. The present invention integrates a tail gas purification module, which can receive the electric energy processed by the conversion module and utilize this electric energy to activate the chemical or physical processes in the tail gas purification process, thereby effectively purifying the tail gas emitted by the vehicle engine. This is particularly important for range-extended and plug-in hybrid vehicles because these vehicles still emit tail gas in certain driving modes.
[0016] 2. The power battery pack serves as the energy source of the system and efficiently transmits electric energy to subsequent modules through the electric energy transmission module. The introduction of the switch control module allows the system to control the flow of electric energy according to requirements, avoiding unnecessary energy losses. The controller intelligently adjusts the closing and opening of the switch control module, as well as the operating frequency and output pulse width of the conversion module, based on the vehicle's overall power information (including engine operating conditions and power battery status). This dynamic adjustment optimizes the utilization efficiency of electric energy and ensures that the tail gas purification module can receive the most suitable electric energy input.
[0017] In summary, the present invention presents an efficient, intelligent, and environmentally friendly tail gas purification system, which is particularly suitable for range-extended and plug-in hybrid vehicles. It can effectively purify the tail gas and reduce the environmental impact of the vehicle. Description of the Drawings
[0018] Figure 1 It is the principle block diagram of the vehicle tail gas purification system described in the embodiment of the present application; Figure 2 It is the circuit diagram (excluding the controller) of the vehicle tail gas purification system described in the embodiment of the present application; Figure 3 It is the working flow chart of the vehicle tail gas purification system described in the embodiment of the present application; Figure 4 It is the flow chart of the vehicle tail gas purification method described in the embodiment of the present application; In the figure: 1 - power battery pack, 2 - electric energy transmission module, 3 - switch control module, 4 - conversion module, 5 - tail gas purification module, 6 - controller. Detailed Embodiments
[0019] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, rather than for limiting the protection scope of the present invention.
[0020] As Figure 1 shown, in the embodiment of the present application, a vehicle exhaust gas purification system includes a power battery pack 1, a power transmission module 2, a switch control module 3, a conversion module 4, an exhaust gas purification module 5, and a controller 6. The power battery pack 1 has a positive connection end and a negative connection end, and is used to provide electric energy. The power transmission module 2 is connected to the positive connection end and the negative connection end of the power battery pack 1, and is used to transmit the electric energy provided by the power supply group. The input end of the switch control module 3 is connected to the output end of the power transmission module 2, and is used to control the on-off of the power transmission module 2. The input end of the conversion module 4 is connected to the output end of the switch control module 3, and is used to realize the conversion and transmission of electric energy. The input end of the exhaust gas purification module 5 is connected to the output end of the conversion module 4. The controller 6 is respectively connected to the control ends of the switch control module 3 and the conversion module 4, and is used to control the closing and opening of the switch control module 3 according to the vehicle power information, and control the working frequency and output pulse width of the conversion module 4 based on the vehicle power information; wherein, the vehicle power information includes the engine working condition and the power battery state.
[0021] In a possible embodiment, the controller 6 is configured to: Be awakened and in a ready state when the engine starts. Obtain the vehicle power information. When it is confirmed that the vehicle power is normal, the controller 6 is in an active state and controls the switch control module 3 to close. Judge the exhaust gas emission situation according to the engine working condition, and control the working frequency and output pulse width of the conversion module 4 based on the engine working condition and the power battery state. Configuring the controller 6 to be awakened and in a ready state when the engine starts ensures that the system can respond to the start of the engine in a timely manner and prepare for subsequent exhaust gas purification work. By obtaining the vehicle power information (such as the power battery state, engine working condition, etc.), the controller 6 can comprehensively understand the current working state of the vehicle and provide a basis for subsequent control strategies. When it is confirmed that the vehicle power is normal, the controller 6 is activated and controls the switch control module 3 to close, so that the electric energy can be smoothly transmitted to the conversion module 4 to provide the required electric energy for the exhaust gas purification module 5. By real-time monitoring the engine working condition and the power battery state, the controller 6 can dynamically adjust the working frequency and output pulse width of the conversion module 4, thereby optimizing the exhaust gas purification effect and ensuring the reasonable use of the power battery at the same time.
[0022] In a possible embodiment, the controller 6 is further configured to: When it is determined that the power battery has sufficient power and the tail gas emission is large, increase the output power of the system. When the power battery has sufficient power and the tail gas emission is small, reduce the output power of the system. When the power battery has insufficient power, control the system to output the minimum power. When the power battery has sufficient power and the tail gas emission is large, increasing the system output power can more effectively purify the tail gas and meet higher environmental protection requirements. When the power battery has sufficient power but the tail gas emission is small, reducing the system output power can save electric energy and extend the service life of the power battery. When the power battery has insufficient power, controlling the system to output the minimum power can ensure the basic operation requirements of the vehicle, avoid excessive consumption of the electric energy of the power battery, and extend the cruising range of the vehicle.
[0023] In a possible embodiment, the controller 6 is further configured to: be in a sleep state when the engine is not started, and the system does not work. This can avoid consuming the electric energy of the power battery and extend the cruising range of the vehicle.
[0024] The controller 6 is the main control part of the vehicle tail gas purification system. Exemplarily, it can be an MCU (Micro Control Unit), which is communicatively mounted on the CAN bus, receives the engine working conditions, the power battery status and other power-related messages, and sends the status messages of the vehicle tail gas purification system.
[0025] In a possible embodiment, the tail gas purification module 5 uses a low-temperature plasma tail gas treatment device. The total voltage of the power battery pack 1 is not less than 800V; the electric energy transmission module 2 is a high-voltage DC bus; the positive connection end of the power battery pack 1 is connected to the positive end of the high-voltage DC bus; the negative connection end of the power battery pack 1 is connected to the negative end of the high-voltage DC bus. As a rapidly developing tail gas treatment device, the plasma tail gas treatment device has the characteristics of being able to treat multiple pollutants simultaneously, having no secondary pollution, and a high purification rate, and can be well applied to the tail gas treatment of vehicles. Compared with the currently commonly used catalyst treatment scheme, it has the advantages of lower cost and better controllability. However, it also has higher requirements for the electric energy of the vehicle, so it is difficult to be implemented on traditional fuel vehicles. And for range-extended and plug-in hybrid vehicles, due to the existence of the battery power platform, it can well realize the generation and control of low-temperature plasma, so as to complete the efficient treatment of tail gas. In addition, using high voltage and a high-voltage DC bus can improve the electric energy transmission efficiency, reduce energy loss, and meet the requirements of the tail gas purification module 5 for high voltage and high power at the same time.
[0026] In a possible embodiment, the power battery pack 1 includes a plurality of power battery monomers connected in series. Exemplarily, the power battery monomers can be ternary lithium batteries or lithium iron phosphate batteries, outputting high-voltage DC, that is Figure 1 and Figure 2 the U in1 。
[0027] In a possible embodiment, the switch control module 3 includes a first switch and a second switch. The input end of the first switch is connected to the positive end of the high-voltage DC bus, and the input end of the second switch is connected to the negative end of the high-voltage DC bus. The output ends of the first switch and the second switch are connected to the input end of the conversion module 4 to transmit the high-voltage DC U 1 to the conversion module 4 as the input of the conversion module 4, that is Figure 1 and Figure 2 the U in in . By controlling the positive and negative ends of the high-voltage DC bus through two switches respectively, precise control and transmission of electric energy can be achieved, ensuring the stability and safety of the system.
[0028] In a possible embodiment, the conversion module 4 includes a full-bridge inverter circuit and a pulse transformer. The full-bridge inverter circuit includes multiple bridge arm units and is used to output a first voltage. The pulse transformer is coupled to multiple first bridge arm units and is used to convert the first voltage into a second voltage. The combination of the full-bridge inverter circuit and the pulse transformer can achieve the conversion and boosting of electric energy, converting the DC electric energy provided by the power battery into high-voltage pulse electric energy suitable for use by the exhaust gas purification module 5.
[0029] In a possible embodiment, the full-bridge inverter circuit includes two bridge arm units; both ends of the primary side of the pulse transformer are respectively connected to the midpoints of the two bridge arm units. The secondary side of the pulse transformer serves as the high-voltage pulse output end and is used to connect to the power supply end of the exhaust gas purification module 5. The combination of two bridge arm units and a pulse transformer can achieve efficient conversion and boosting of electric energy, while ensuring the stability and controllability of the output voltage. The secondary side of the pulse transformer outputs high-voltage pulse electric energy to provide the required electric energy for the exhaust gas purification module 5, ensuring its normal operation and effectively purifying the exhaust gas.
[0030] As Figure 2 shown, in a possible embodiment, the first switch is composed of a relay S1 and its driving chip, and the second switch is composed of a relay S1 and its driving chip. The first switch and the second switch are respectively connected to the controller 6, and the controller 6 is used to control the closing and opening of the first switch and the second switch.
[0031] As Figure 2As shown, in a possible embodiment, one arm unit of the full-bridge inverter circuit includes a switching transistor Q1 and a switching transistor Q4. The gates of the switching transistor Q1 and the switching transistor Q4 are respectively connected to the controller 6, and the controller 6 controls the conduction and cut-off of the switching transistor Q1 and the switching transistor Q4. The source of the switching transistor Q1 is connected to the drain of the switching transistor Q4 (i.e., the midpoint of this arm), the drain of the switching transistor Q1 is connected to the positive connection end of the power battery pack 1 after passing through the relay S1, and the source of the switching transistor Q4 is connected to the negative connection end of the power battery pack 1 after passing through the relay S2.
[0032] As Figure 2 shown, in a possible embodiment, the other arm unit of the full-bridge inverter circuit includes a switching transistor Q3 and a switching transistor Q2. The gates of the switching transistor Q3 and the switching transistor Q2 are respectively connected to the controller 6, and the controller 6 controls the conduction and cut-off of the switching transistor Q3 and the switching transistor Q2. The source of the switching transistor Q3 is connected to the drain of the switching transistor Q2 (i.e., the midpoint of this arm unit), the drain of the switching transistor Q3 is connected to the positive connection end of the power battery pack 1 after passing through the relay S1, and the source of the switching transistor Q2 is connected to the negative connection end of the power battery pack 1 after passing through the relay S2.
[0033] The controller 6 controls the turn-on frequency and time of the switching transistors of each arm through isolated drive, and inputs a bipolar high-voltage pulse on the primary side of the pulse transformer, that is, U in , after a voltage boost ratio of k times, a bipolar high-voltage pulse with an amplitude of up to more than ten kilovolts and a repetition frequency between several hundred and several thousand hertz is obtained on the secondary side, that is, Figure 1 and Figure 2 the U out in, so as to meet the requirements of exciting low-temperature plasma. Exemplarily, each switching transistor can be an IGBT, and the magnetic core of the pulse transformer can be an amorphous nano-magnetic core.
[0034] As Figure 2 shown, the conversion module 4 further includes a high-voltage capacitor C, and both ends of the high-voltage capacitor C are respectively connected to the output end of the switch control module 3. The setting of the high-voltage capacitor C can suppress voltage spikes, improve circuit stability, improve power quality, and adapt to high-frequency operation, etc.
[0035] As Figure 3 shown, the working process of a vehicle exhaust gas purification system is as follows: The controller 6 initially operates in a sleep state and waits to be woken up after the engine starts. The controller 6 listens to the bus messages, checks the vehicle power information, and after confirming that the vehicle power is normal, starts the vehicle exhaust gas purification system, controls the relays S1 and S2 of the switch control module 3 to close, and inputs high-voltage direct current to the conversion module 4. At the same time, the controller 6 evaluates the power battery power. If the power is low, it controls the conversion module 4 to operate at the lowest pulse output frequency, that is, a minimum power output. If the power is sufficient, it further evaluates the exhaust gas emission status. The controller 6 performs pulse width and frequency modulation according to the exhaust gas emission situation, and controls the switching tube to increase or decrease the output power accordingly to adapt to the exhaust gas emission situation. For example, when the emission increases, the output power is increased, and when the emission decreases, the output power is decreased.
[0036] As Figure 3 shown, in the embodiment of the present application, a vehicle exhaust gas purification method uses the vehicle exhaust gas purification system described in the embodiment of the present application, and its control method includes the following steps: Obtain vehicle power information, including the state of the power battery and the engine operating conditions.
[0037] Judge the power battery power based on the state of the power battery, and judge the exhaust gas emissions based on the engine operating conditions.
[0038] When the power battery power is sufficient and the exhaust gas emissions are large, increase the output power of the system. When the power battery power is sufficient and the exhaust gas emissions are small, decrease the output power of the system. When the power battery power is insufficient, control the system to output the minimum power.
[0039] In the embodiment of the present application, a vehicle uses the vehicle exhaust gas purification system described in the embodiment of the present application.
[0040] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.
Claims
1. A vehicle exhaust purification system, characterized in that: include: A power battery pack (1) having a positive electrode connection terminal and a negative electrode connection terminal, and used for providing electric energy; An electric energy transmission module (2) connected to the positive electrode connection terminal and the negative electrode connection terminal of the power battery pack (1) and used for transmitting electric energy provided by the power supply pack; A switch control module (3), the input end of which is connected to the output end of the power transmission module (2), and is used to control the on and off of the power transmission module (2); A conversion module (4), whose input end is connected to the output end of the switch control module (3) and is used to realize the conversion and transmission of electric energy; An exhaust gas purification module (5), whose input end is connected to the output end of the conversion module (4); A controller (6) connected to the control ends of the switch control module (3) and the conversion module (4) respectively, and used to control the closing and opening of the switch control module (3) according to the power information of the whole vehicle, and to control the operating frequency and output pulse width of the conversion module (4) based on the power information of the whole vehicle; Among them, the vehicle power information includes engine operating conditions and power battery status.
2. The vehicle exhaust purification system according to claim 1, characterized in that: The controller (6) is configured to: Awakened and ready when the engine starts; Obtain vehicle power information; When it is confirmed that the power of the whole vehicle is normal, the controller (6) is in an activated state, and the control switch control module (3) is closed; The exhaust emission condition is determined according to the engine operating condition, and the operating frequency and output pulse width of the conversion module (4) are controlled based on the engine operating condition and the power battery state.
3. The vehicle exhaust purification system according to claim 2, characterized in that: The controller (6) is also configured to: When it is determined that the power battery is fully charged and the exhaust emissions are large, the output power of the system is increased; When the power battery is fully charged and the exhaust emissions are low, the system output power is reduced; When the power battery is low on power, the control system outputs minimum power.
4. The vehicle exhaust purification system according to claim 2, characterized in that: The controller (6) is also configured to be in a dormant state when the engine is not started, and the system does not work.
5. The vehicle exhaust purification system according to claim 1, characterized in that: The exhaust gas purification module (5) adopts a low-temperature plasma exhaust gas treatment device; the total voltage of the power battery pack (1) is not less than 800V; the power transmission module (2) is a high-voltage DC bus; the positive electrode connection end of the power battery pack (1) is connected to the positive end of the high-voltage DC bus; and the negative electrode connection end of the power battery pack (1) is connected to the negative end of the high-voltage DC bus.
6. The vehicle exhaust purification system according to claim 5, characterized in that: The switch control module (3) comprises a first switch and a second switch, wherein the input end of the first switch is connected to the positive end of the high-voltage DC bus, and the input end of the second switch is connected to the negative end of the high-voltage DC bus; the output end of the first switch and the output end of the second switch are connected to the input end of the conversion module (4).
7. The vehicle exhaust purification system according to claim 1, characterized in that: The conversion module (4) comprises: A full-bridge inverter circuit comprises a plurality of bridge arm units and is used to output a first voltage; The pulse transformer is coupled to the plurality of first bridge arm units and is used for converting the first voltage into a second voltage.
8. The vehicle exhaust purification system according to claim 7, characterized in that: The full-bridge inverter circuit includes two bridge arm units; The two ends of the primary side of the pulse transformer are respectively connected to the midpoints of the two bridge arm units; The secondary side of the pulse transformer serves as a high-voltage pulse output terminal, and is used to connect to the power supply terminal of the exhaust gas purification module (5).
9. A vehicle exhaust purification method, characterized in that: The vehicle exhaust purification system according to any one of claims 1 to 8 is adopted, and its control method comprises the following steps: Obtain vehicle power information, including power battery status and engine operating conditions; Determine the power battery capacity based on the power battery status, and determine the exhaust emissions based on the engine operating conditions; When the power battery is fully charged and the exhaust emissions are large, the system output power is increased; when the power battery is fully charged and the exhaust emissions are small, the system output power is reduced; when the power battery is insufficient, the control system outputs the minimum power.
10. A vehicle, characterized in that: A vehicle exhaust purification system as described in any one of claims 1 to 8 is used.