Heating control method and system for SCR (Selective Catalytic Reduction) system of vehicle, vehicle and equipment

Abstract

The invention discloses a heating control method and system for an SCR system of a vehicle, the vehicle and equipment. The vehicle comprises a hydrogen engine and a hydrogen supply system, a valve body and an ignition device are arranged in front of a catalyst carrier of the SCR system, the valve body is connected with the hydrogen supply system through a pipeline so that hydrogen from the hydrogen supply system can be conveyed into the SCR system through the valve body, and the ignition device is used for igniting the hydrogen conveyed into the SCR system. A heating control method of an SCR system of a vehicle includes: detecting a state of a hydrogen engine; if the hydrogen engine is in the ignition operation state, the valve body is controlled to be opened, so that hydrogen provided by the hydrogen supply system is obtained through the pipeline; and after the valve body is opened for a preset time, the ignition device is controlled to work, so that the temperature in the SCR system is increased by igniting the hydrogen conveyed into the SCR system. By adopting the application, when the hydrogen engine is ignited and runs, hydrogen is conveyed to the SCR system through the valve body and the ignition device and is ignited, so that the SCR system is heated, and the working efficiency of the SCR system is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a heating control method and system of an SCR system of a vehicle, a vehicle and equipment. BACKGROUND

[0002] In the use process of a hydrogen engine, in order to achieve exhaust gas purification, a selective catalytic reduction (SCR) system is usually used for exhaust gas aftertreatment. The SCR sprays urea, which generates NH3 and CO2 at high temperatures. The released NH3 is fully mixed with the exhaust gas in the SCR aftertreatment device, and under the action of the SCR catalyst, the NOx in the exhaust gas is reduced to N2 and H2O, so as to achieve the purpose of reducing emissions. However, before the exhaust gas discharged by the engine enters the SCR aftertreatment device, it will experience a large heat loss. When the internal temperature of the SCR is lower than 200℃, the NH3 decomposed from urea will preferentially react with NO2 to generate a solid, causing the catalyst carrier to be blocked, so that the SCR system cannot normally perform exhaust gas treatment work, thereby affecting the exhaust gas purification efficiency and emission performance of the vehicle. SUMMARY

[0003] Therefore, it is necessary to solve the above technical problems. When the hydrogen engine is in an ignition operation state, hydrogen gas is delivered to the SCR system through the valve body and the ignition device, and the SCR system is heated, so as to effectively improve the working efficiency of the SCR system.

[0004] In a first aspect, a heating control method of an SCR system of a vehicle is provided. The vehicle includes a hydrogen engine and a hydrogen supply system. A valve body and an ignition device are arranged in front of a catalyst carrier of the SCR system. The valve body is connected to the hydrogen supply system through a pipeline to deliver hydrogen gas from the hydrogen supply system to the SCR system through the valve body. The ignition device is used to ignite the hydrogen gas delivered to the SCR system. The heating control method of the SCR system of the vehicle includes the following steps: detecting a state of the hydrogen engine; if the hydrogen engine is in an ignition operation state, controlling the valve body to be opened to obtain hydrogen gas provided by the hydrogen supply system through the pipeline; after the valve body is opened for a predetermined time, controlling the ignition device to work to heat the temperature in the SCR system by igniting the hydrogen gas delivered to the SCR system.

[0005] Further, after heating the temperature in the SCR system, the method further includes the following steps: obtaining a real-time temperature in the SCR system; determining whether the real-time temperature in the SCR system is greater than a predetermined temperature; if yes, controlling the valve body to be closed and controlling the ignition device to stop working.

[0006] Further, the predetermined temperature is 210-230℃.

[0007] Further, when heating the temperature in the SCR system, further comprising: If the hydrogen engine is switched from the ignition running state to the off state, the valve body is controlled to be closed, and the ignition device is controlled to stop working.

[0008] Further, a one-way valve is arranged on the pipeline through which the valve body communicates with the hydrogen supply system.

[0009] Further, the valve body is a proportional valve, and the control of the valve body opening includes: obtaining the oxygen concentration in the exhaust gas of the vehicle; determining the opening of the proportional valve according to the oxygen concentration; controlling the proportional valve to open according to the opening of the proportional valve.

[0010] Further, further comprising: obtaining the concentration of nitrogen oxide gas in the exhaust gas; adjusting the amount of urea injected by the SCR system according to the concentration of nitrogen oxide gas in the exhaust gas.

[0011] In a second aspect, a heating control system of an SCR system of a vehicle is provided, the vehicle comprising a hydrogen engine and a hydrogen supply system, a catalyst carrier of the SCR system being provided with a valve body and an ignition device in front of the catalyst carrier, the valve body being connected to the hydrogen supply system through a pipeline to deliver hydrogen from the hydrogen supply system to the SCR system through the valve body, and the ignition device being used to ignite the hydrogen delivered to the SCR system, wherein the heating control of the SCR system of the vehicle comprises: a detection module for detecting the state of the hydrogen engine; a control module for controlling the valve body to open when the hydrogen engine is in an ignition running state to obtain hydrogen provided by the hydrogen supply system through the pipeline, and for controlling the ignition device to work after the valve body is opened for a predetermined time to heat the temperature in the SCR system by igniting the hydrogen delivered to the SCR system.

[0012] In a third aspect, a vehicle is provided, comprising a heating control system of an SCR system of the vehicle according to the second aspect described above.

[0013] In a fourth aspect, a computer device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the program, the steps of the heating control method of the SCR system of the vehicle according to the first aspect and any possible implementation manner of the first aspect are implemented.

[0014] With the embodiments of the present application, firstly, the state of the hydrogen engine is detected; if the hydrogen engine is in the ignition running state, the valve body is controlled to be opened to obtain the hydrogen provided by the hydrogen supply system through the pipeline; and finally, after the valve body is opened for a predetermined time, the ignition device is controlled to work to heat the temperature in the SCR system by igniting the hydrogen delivered to the SCR system. In this way, when the hydrogen engine is in the ignition running state, the hydrogen is delivered to the SCR system through the valve body and the ignition device, and ignited, so as to heat the SCR system, thereby effectively improving the working efficiency of the SCR system. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings: Figure 1 A flow chart of the heating control method of the SCR system of the vehicle provided by the embodiments of the present application is provided; Figure 2 A schematic diagram of the SCR heating system arrangement provided by the embodiments of the present application is provided; Figure 3 A functional interface schematic diagram provided by the embodiments of the present application is provided; Figure 4 A technical flow chart provided by the embodiments of the present application is provided; Figure 5 A proportional valve control method flow chart schematic diagram provided by the embodiments of the present application is provided; Figure 6 A structural block diagram of the heating control system of the SCR system of the vehicle provided by the embodiments of the present application is provided; Figure 7 A structural block diagram of the computer device provided by the embodiments of the present application is provided. DETAILED DESCRIPTION

[0016] The present application will be further described in detail below with reference to the embodiments and the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the related application, but not to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the convenience of description.

[0017] It should be noted that the features of the embodiments in the present application, i.e. the features of the embodiments, can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] The heating control method of the SCR system of the vehicle, the system, the vehicle and the equipment according to the embodiments of the present application are described in detail below with reference to the drawings.

[0019] Figure 1 is a flow chart of the heating control method of the SCR system of the vehicle according to an embodiment of the present application. The heating control method of the SCR system of the vehicle according to the embodiments of the present application is combined with Figure 2 As shown in the figure, the catalyst carrier of the SCR system is provided with a valve body and an ignition device in front of the catalyst carrier, the valve body is connected with the hydrogen supply system through a pipeline to deliver the hydrogen from the hydrogen supply system to the SCR system through the valve body, and the ignition device is used to ignite the hydrogen delivered to the SCR system, such as Figure 1 The heating control method of the SCR system of the vehicle includes the following steps: S101: detecting the state of the hydrogen engine.

[0020] S102: if the hydrogen engine is in the ignition running state, controlling the valve body to open to obtain the hydrogen provided by the hydrogen supply system through the pipeline.

[0021] Specifically, the circuit in which the valve body and the ignition device are located is in a normally open state, that is, it is closed by default and does not work after each time the vehicle is powered on. When it is detected that the hydrogen engine is in the ignition running state, the on-circuit of the engine management system drives the valve body to work; if the condition is not met, the circuit is not turned on.

[0022] In an embodiment of the present application, as shown in Figure 2 and Figure 3 A one-way valve is arranged on the pipeline in which the valve body and the hydrogen supply system are communicated to ensure the flow direction of the hydrogen.

[0023] In an embodiment of the present application, the valve body is a proportional valve, and the control of the opening of the valve body includes: obtaining the oxygen concentration in the exhaust gas of the vehicle; determining the opening degree of the proportional valve according to the oxygen concentration; and controlling the opening of the proportional valve according to the opening degree of the proportional valve.

[0024] Specifically, as shown in Figure 5 The engine management system collects the oxygen concentration in the exhaust gas of the vehicle through an oxygen concentration sensor; and according to a preset oxygen concentration-hydrogen flow and proportional valve opening degree-hydrogen flow model, calculates the hydrogen flow that needs to be delivered by the proportional valve and the corresponding proportional valve opening degree; and then outputs an electric signal to control the opening degree of the proportional valve in real time to control the output hydrogen flow, so as to output the hydrogen in the target state.

[0025] S103: after the valve body is opened for a predetermined time, controlling the ignition device to work to heat the temperature in the SCR system by igniting the hydrogen delivered to the SCR system.

[0026] Specifically, the ignition device can generate electric sparks at a fixed frequency, thereby igniting the hydrogen delivered through the valve body, as shown in Figure 3 As shown, one end of the valve body is connected to the power supply through the vehicle harness, and the other end is connected to the engine management system; one end of the ignition device is connected to the power supply through the vehicle harness, and the other end is connected to the engine management system. In one specific example, the on-circuit of the engine management system controls the ignition device to work after the valve body is opened for 15s. In other examples, the predetermined time can also be set according to actual conditions.

[0027] In an embodiment of the present application, when heating the temperature in the SCR system, further comprising: obtaining the real-time temperature in the SCR system; determining whether the real-time temperature in the SCR system is greater than a predetermined temperature; if so, controlling the valve body to close and controlling the ignition device to stop working. Wherein the predetermined temperature is 210℃ to 230℃.

[0028] In an embodiment of the present application, when heating the temperature in the SCR system, further comprising: if the hydrogen engine is switched from the ignition running state to the extinguishing state, controlling the valve body to close and controlling the ignition device to stop working.

[0029] Specifically, as shown in Figure 4 As shown, the engine management system drives the valve body and the ignition device to work through the circuit after determining that the engine is in the ignition running state. After the valve body and the ignition device work, the engine management system will continue to collect the engine working state and collect the real-time temperature in the SCR system through the temperature sensor. When the real-time temperature is greater than a predetermined temperature or the engine is in the extinguishing state, the circuit is disconnected, the valve body and the ignition device are closed, and if both conditions are not met, the above information is continuously collected.

[0030] In an embodiment of the present application, further comprising: obtaining the concentration of nitrogen oxide gas in the exhaust gas; adjusting the amount of urea sprayed by the SCR system according to the concentration of nitrogen oxide gas in the exhaust gas.

[0031] Wherein the concentration of nitrogen oxide gas in the exhaust gas is obtained by the NOx sensor.

[0032] According to the heating control method of the SCR system of a vehicle according to an embodiment of this application, the status of the hydrogen engine is first detected; if the hydrogen engine is in ignition operation, the valve body is opened to obtain hydrogen supplied by the hydrogen supply system through the pipeline; finally, after a predetermined time after the valve body is opened, the ignition device is controlled to operate to heat the temperature inside the SCR system by igniting the hydrogen supplied to the SCR system. Therefore, when the hydrogen engine is ignited, hydrogen can be supplied to the SCR system and ignited through the valve body and ignition device to achieve SCR system heating, thereby effectively improving the working efficiency of the SCR system.

[0033] Figure 6 This is a structural block diagram of the heating control system of a vehicle's SCR system according to an embodiment of this application. Figure 6 As shown, according to an embodiment of this application, the heating control system of a vehicle's SCR system includes a hydrogen engine and a hydrogen supply system. A valve body and an ignition device are provided before the catalyst carrier of the SCR system. The valve body is connected to the hydrogen supply system via a pipeline to deliver hydrogen from the hydrogen supply system to the SCR system. The ignition device is used to ignite the hydrogen delivered to the SCR system. The heating control of the vehicle's SCR system includes a detection module 610 and a control module 620, wherein: Detection module 610 is used to detect the status of the hydrogen engine; The control module 620 is used to control the valve body to open when the hydrogen engine is in the ignition operation state, so as to obtain hydrogen from the hydrogen supply system through the pipeline, and to control the ignition device to work after the valve body has been open for a predetermined time, so as to heat the temperature in the SCR system by igniting the hydrogen supplied to the SCR system.

[0034] According to the heating control system of the vehicle's SCR system in this application embodiment, the status of the hydrogen engine is first detected; if the hydrogen engine is in ignition operation, the control valve is opened to obtain hydrogen from the hydrogen supply system through the pipeline; finally, after a predetermined time after the valve is opened, the ignition device is controlled to operate, thereby heating the SCR system by igniting the hydrogen supplied to the SCR system. Thus, when the hydrogen engine is ignited, hydrogen can be supplied to the SCR system and ignited through the valve and ignition device, achieving SCR system heating and effectively improving the SCR system's operating efficiency.

[0035] The specific definition of the heating control system of the SCR system of the vehicle can refer to the definition of the heating control method of the SCR system of the vehicle in the foregoing, which will not be repeated here. Each module of the heating control system of the SCR system of the vehicle described above can be realized by software, hardware, and a combination thereof, in whole or in part. Each module described above can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory of the computer device in the form of software, so as to be called and executed by the processor to perform the operation corresponding to each module.

[0036] In one embodiment, a vehicle is provided, comprising the heating control system of the SCR system of the vehicle according to any one of the above embodiments, the vehicle comprising a hydrogen engine and a hydrogen supply system, a valve body and an ignition device being arranged in front of a catalyst carrier of the SCR system, the valve body being connected to the hydrogen supply system through a pipeline to deliver hydrogen from the hydrogen supply system to the SCR system through the valve body, and the ignition device being used to ignite the hydrogen delivered to the SCR system. The vehicle first detects the state of the hydrogen engine; if the hydrogen engine is in an ignition running state, the valve body is controlled to be opened to obtain hydrogen provided by the hydrogen supply system through the pipeline; and finally, after the valve body is opened for a predetermined time, the ignition device is controlled to work to heat the temperature in the SCR system by igniting the hydrogen delivered to the SCR system. In this way, when the hydrogen engine is in the ignition running state, hydrogen can be delivered to the SCR system through the valve body and ignited by the ignition device, so that the SCR system is heated, thereby effectively improving the working efficiency of the SCR system.

[0037] In addition, other configurations and effects of the vehicle according to the embodiments of the present application are known to those skilled in the art, which will not be repeated here.

[0038] In one embodiment, a computer device is provided. Figure 7 The structure block diagram of the computer device provided in the embodiments of the present application is shown in Figure 7 The computer device comprises a memory and a processor, and the memory stores a computer program, and the processor executes the computer program to realize the above-mentioned embodiments of the heating control method of the SCR system of the vehicle. For example, the following are executed: detecting the state of the hydrogen engine; If the hydrogen engine is in an ignition running state, the valve body is controlled to be opened to obtain hydrogen provided by the hydrogen supply system through the pipeline; After the valve body is opened for a predetermined time, the ignition device is controlled to work to heat the temperature in the SCR system by igniting the hydrogen delivered to the SCR system.

[0039] Those skilled in the art can understand that all or part of the processes in the method for implementing the above embodiments can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above embodiments of the method. In the embodiments provided in the present application, any reference to memory, storage, database or other medium can include at least one of non-volatile and volatile memory. The non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory. The volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0040] The technical features of the above embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features of the above embodiments are not described, but as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0041] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A heating control method of an SCR system of a vehicle, characterized by, The vehicle comprises a hydrogen engine and a hydrogen supply system, a valve and an ignition device are arranged in front of a catalyst carrier of the SCR system, the valve is connected with the hydrogen supply system through a pipeline to deliver hydrogen from the hydrogen supply system to the SCR system through the valve, the ignition device is used to ignite the hydrogen delivered to the SCR system, and a heating control method of the SCR system of the vehicle comprises the following steps: detecting a state of the hydrogen engine; if the hydrogen engine is in an ignition state, controlling the valve to open to obtain hydrogen provided by the hydrogen supply system through the pipeline; after the valve is opened for a predetermined time, controlling the ignition device to work to heat a temperature in the SCR system by igniting the hydrogen delivered to the SCR system.

2. The heating control method of an SCR system of a vehicle according to claim 1, characterized by, After heating the temperature in the SCR system, further comprising: obtaining a real-time temperature in the SCR system; determining whether the real-time temperature in the SCR system is greater than a predetermined temperature; if yes, controlling the valve to close and controlling the ignition device to stop working.

3. The heating control method of an SCR system of a vehicle according to claim 2, characterized by, The predetermined temperature is 210-230℃.

4. The heating control method of an SCR system of a vehicle according to claim 1, characterized by, When heating the temperature in the SCR system, further comprising: if the hydrogen engine is switched from the ignition state to an off state, controlling the valve to close and controlling the ignition device to stop working.

5. The heating control method of an SCR system of a vehicle according to any one of claims 1 to 4, characterized in that, A one-way valve is arranged on the pipeline through which the valve communicates with the hydrogen supply system.

6. The heating control method of an SCR system of a vehicle according to any one of claims 1 to 4, characterized by, The valve is a proportional valve, and the control of the valve opening comprises the following steps: obtaining an oxygen concentration in exhaust gas of the vehicle; determining a proportional valve opening degree according to the oxygen concentration; controlling the proportional valve to open according to the proportional valve opening degree.

7. The heating control method of an SCR system of a vehicle according to any one of claims 1 to 4, characterized by, Further comprising: obtaining a concentration of nitrogen oxide gas in the exhaust gas; adjusting an amount of urea injected by the SCR system according to the concentration of nitrogen oxide gas in the exhaust gas.

8. A heating control system for an SCR system of a vehicle, the vehicle comprising a hydrogen engine and a hydrogen supply system, a catalyst carrier of the SCR system being provided with a valve body and an ignition device in front of the catalyst carrier, the valve body being connected to the hydrogen supply system by a line for delivering hydrogen from the hydrogen supply system through the valve body into the SCR system, the ignition device being provided for igniting the hydrogen delivered into the SCR system, wherein The heating control of the SCR system of the vehicle comprises: a detection module for detecting a state of the hydrogen engine; a control module for controlling the valve to open to obtain hydrogen provided by the hydrogen supply system through the pipeline when the hydrogen engine is in an ignition state, and for controlling the ignition device to work to heat a temperature in the SCR system by igniting the hydrogen delivered to the SCR system after the valve is opened for a predetermined time.

9. A vehicle characterized by comprising: comprising: the heating control system of the SCR system of the vehicle according to claim 8.

10. A computer device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When a processor executes a program, the heating control method of the SCR system of the vehicle according to any one of claims 1-7 is realized.

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