Control method and device for heating system in aftertreatment system, processor and vehicle

Abstract

The invention discloses a control method and device for a heating system in an aftertreatment system, a processor and a vehicle. The method comprises the steps that when the vehicle is in a power-on state, the working state of an engine in the vehicle is obtained; in response to the fact that the working state is the running state, a heating system in an aftertreatment system of the engine is controlled, a selective catalytic reduction postprocessor in the aftertreatment system is heated, and the selective catalytic reduction postprocessor is used for converting nitrogen oxide in gas generated by the engine into nitrogen and water; and in response to the situation that the temperature in the heated selective catalytic reduction postprocessor is larger than or equal to a temperature threshold value and / or the working state is converted from the running state to the stop state, the heating system is controlled to stop heating the selective catalytic reduction postprocessor. The technical problem that normal work of the post-processing system cannot be effectively guaranteed is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of post-processing control, and in particular to a control method, device, processor and vehicle for a heating system in a post-processing system. Background Art

[0002] At present, in the post-processing control of vehicle exhaust gas, the engine will produce gas during the operation of the vehicle, and the gas contains some harmful pollutants, such as nitrogen oxides (NO X ), hydrocarbons (HC), carbon monoxide (CO) and particulate matter, etc.

[0003] In order to reduce the emission of harmful pollutants in the gas generated by the engine, an aftertreatment system can usually be added after the engine. The aftertreatment system control technology plays a key role in achieving the goal of reducing gas emissions. For example, the Selective Catalytic Reduction (SCR) aftertreatment in the aftertreatment system can reduce nitrogen oxides into harmless nitrogen and water vapor, thereby reducing nitrogen oxide emissions.

[0004] However, the SCR post-processor has certain requirements for the operating temperature and needs to work normally within a certain operating temperature range. If the operating temperature is too low or too high, it may affect the operation of the post-processing system, resulting in technical problems that cannot effectively ensure the normal operation of the post-processing system.

[0005] With respect to the above-mentioned technical problem that the normal operation of the post-processing system cannot be effectively guaranteed, no effective solution has been proposed so far. Summary of the invention

[0006] Embodiments of the present invention provide a control method, device, processor and vehicle for a heating system in a post-processing system, so as to at least solve the technical problem that the normal operation of the post-processing system cannot be effectively ensured.

[0007] According to one aspect of an embodiment of the present invention, a control method for a heating system in a post-treatment system is provided. The method may include: when the vehicle is powered on, obtaining the working state of the engine in the vehicle; in response to the working state being the running state, controlling the heating system in the post-treatment system of the engine to heat the selective catalytic reduction post-processor in the post-treatment system, wherein the selective catalytic reduction post-processor is used to convert nitrogen oxides in the gas generated by the engine into nitrogen and water; in response to the temperature in the heated selective catalytic reduction post-processor being greater than or equal to a temperature threshold, and / or the working state being converted from the running state to the stopped state, controlling the heating system to stop heating the selective catalytic reduction post-processor.

[0008] Optionally, when the vehicle is powered on, the operating state of the engine in the vehicle is obtained, including: collecting operating parameters of the engine through an electronic control unit in the vehicle, and sending the operating parameters to a urea injection controller in the post-treatment system; controlling the urea injection controller to determine the operating state based on the operating parameters.

[0009] Optionally, when the vehicle is in a powered-on state, after obtaining the working state of the engine in the vehicle, the method further includes: in response to the working state being a running state, using a temperature sensor corresponding to the selective catalytic reduction post-processor to collect the temperature inside the carrier of the selective catalytic reduction post-processor.

[0010] Optionally, the heating system includes an air filter, an air suction pump, a heater and a one-way valve, wherein the air filter is used to filter the air entering the heating system, the air suction pump is used to send the air into the heater, the heater is used to heat the air, and the one-way valve is used to transfer the heated air to the selective catalytic reduction after-processor.

[0011] Optionally, one end of the air pump is connected to the urea injection controller in the aftertreatment system through a wiring harness, the other end of the air pump is connected to the power supply in the vehicle through a wiring harness, one end of the heater is connected to the urea injection controller through a wiring harness, and the other end of the heater is connected to the power supply through a wiring harness, wherein, before controlling the heating system in the aftertreatment system of the engine to heat the selective catalytic reduction afterprocessor in the aftertreatment system, the method also includes: in response to the working state being the running state, controlling the urea injection controller to respectively turn on the wiring harnesses corresponding to the air pump and the heater, so as to control the power supply to provide power to the air pump and the heater, so that the air pump and the heater are in the running state.

[0012] Optionally, in response to the working state being the running state, the heating system in the after-treatment system of the engine is controlled to heat the selective catalytic reduction after-processor in the after-treatment system, including: in response to the working state being the running state, and the air extraction pump and the heater being in the running state, controlling the air to enter the air filter element through the gas pipeline, and filtering the air using the air filter element; generating an air flow through the air extraction pump, and sending the filtered air into the heater through the gas pipeline; heating the incoming air using the heater, and sending the heated air into the one-way valve through the gas pipeline; transmitting the heated gas through the gas pipeline to the selective catalytic reduction after-processor through the one-way valve to heat the selective catalytic reduction after-processor.

[0013] Optionally, in response to the temperature in the selective catalytic reduction afterprocessor after being heated being greater than or equal to a temperature threshold, and / or the working state being converted from a running state to a stopped state, controlling the heating system to stop heating the selective catalytic reduction afterprocessor, including: in response to the temperature in the selective catalytic reduction afterprocessor after being heated being greater than or equal to a temperature threshold, and / or the working state being converted from a running state to a stopped state, controlling the urea injection controller to disconnect the wiring harnesses corresponding to the air extraction pump and the heater respectively, so as to control the power supply to disconnect the power supplied to the air extraction pump and the heater, so that the air extraction pump and the heater stop heating the selective catalytic reduction afterprocessor.

[0014] According to another aspect of an embodiment of the present invention, a control device for a heating system in a post-treatment system is also provided. The device may include: an acquisition unit for acquiring the working state of an engine in a vehicle when the vehicle is powered on; a first control unit for controlling the heating system in the post-treatment system of the engine in response to the working state being the running state, heating the selective catalytic reduction post-processor in the post-treatment system, wherein the selective catalytic reduction post-processor is used to convert nitrogen oxides in the gas generated by the engine into nitrogen and water; a second control unit for controlling the heating system to stop heating the selective catalytic reduction post-processor in response to the temperature in the heated selective catalytic reduction post-processor being greater than or equal to a temperature threshold, and / or the working state being converted from the running state to the stopping state.

[0015] According to another aspect of an embodiment of the present invention, a heating system in a post-processing system is also provided. The system may include: an air filter element, used to filter the air entering the heating system, and transmit the filtered air to an air extraction pump through a gas pipeline; an air extraction pump, used to generate an air flow, and send the filtered air to a heater through a gas pipeline; a heater, used to heat the air entering the heater, and transmit the heated air to a one-way valve through a gas pipeline; a one-way valve, used to transmit the heated air to a selective catalytic reduction post-processor through a gas pipeline, so as to heat the selective catalytic reduction post-processor.

[0016] According to another aspect of an embodiment of the present invention, a processor is further provided, wherein the processor is used to run a program, wherein when the program is run, the method for controlling a heating system in a post-processing system of the embodiment of the present invention is executed.

[0017] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is also provided. The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the control method of the heating system in the post-processing system of the embodiment of the present invention.

[0018] According to another aspect of the present invention, a computer program product is provided, which includes a computer program, and when the computer program is executed by a processor, the control method of the heating system in the post-processing system of the present invention is implemented.

[0019] According to another aspect of an embodiment of the present invention, a vehicle is further provided, and the vehicle is used to execute the control method of a heating system in a post-treatment system of an embodiment of the present invention.

[0020] In an embodiment of the present invention, a heating system may be provided to heat the SCR post-processor to avoid the situation where solids are easily formed through chemical reactions at low temperatures, thereby blocking the SCR post-processor. If the heating system needs to be controlled, the working state of the engine in the vehicle may be obtained when the vehicle is powered on. If the working state of the engine is the running state, the heating system in the post-processing system of the engine may be controlled to heat the SCR post-processor to avoid the influence of the temperature on the working of the post-processing system in the related art, thereby reducing the probability of failure of the SCR post-processor. During the heating process, the temperature in the SCR post-processor and the working state of the engine may be detected in real time. If the temperature in the SCR post-processor is greater than or equal to the temperature threshold, and / or the working state is converted from the running state to the stopping state, the heating system is controlled to stop heating the SCR post-processor. In this embodiment, a heating system may be provided for the SCR post-processor in the post-processing system to achieve the technical effect of effectively ensuring the normal working of the post-processing system, thereby solving the technical problem of being unable to effectively ensure the normal working of the post-processing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 is a flow chart of a method for controlling a heating system in a post-processing system according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of a heating system in a post-processing system according to an embodiment of the present invention;

[0024] Figure 3 It is a schematic diagram of a hydrogen engine aftertreatment system;

[0025] Figure 4 is a schematic diagram of a post-processing heating system according to an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of a functional interface according to an embodiment of the present invention;

[0027] Figure 6 is a flow chart of a control method for a post-treatment heating system of a hydrogen internal combustion engine passenger vehicle according to an embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of a control device for a heating system in a post-processing system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] According to an embodiment of the present invention, an embodiment of a method for controlling a heating system in a post-treatment system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0032] Figure 1 is a flow chart of a method for controlling a heating system in a post-processing system according to an embodiment of the present invention. Figure 1 As shown, the method may include the following steps:

[0033] Step S102, when the vehicle is powered on, obtaining the working state of the engine in the vehicle.

[0034] In the technical solution provided in the above step S102 of the present invention, the vehicle can be a new energy vehicle, for example, a hydrogen engine passenger car. The power-on state can be a state in which the whole vehicle or the equipment of the vehicle has been connected to the power supply and is ready to start working. The engine can also be called an internal combustion engine, for example, it can be a hydrogen engine, a diesel engine, or a gasoline engine. It should be noted that there is no specific limitation here, as long as the engine can produce gases of harmful substances and is treated by a post-treatment system, it is within the protection scope of the embodiment of the present invention.

[0035] Optionally, the working state of the engine may include the engine being in a running state and an off state (i.e., not in a running state). The working state of the engine may be obtained through an indicator light on a dashboard of the vehicle, through a display screen of an onboard system, or through a sensor monitoring parameters such as the engine speed, temperature, and pressure.

[0036] It should be noted that the above method of how to obtain the working status of the engine is only an example and is not specifically limited here. As long as the process can obtain the working status of the engine, it is within the protection scope of the embodiment of the present invention.

[0037] In this embodiment, if the heating system is to be controlled, the state of the vehicle can be detected to determine whether the vehicle is in a powered-on state or a powered-off state. When the vehicle is in a powered-on state, the working state of the engine is obtained.

[0038] For example, a vehicle is usually equipped with a power button, and the vehicle power can be started or turned off by pressing the power button. It is detected whether the power button is in the on state. If the button is in the on state, it means that the vehicle is in the powered-on state.

[0039] For another example, most vehicles have indicator lights on their dashboards, such as the engine status indicator. When the engine is running, the indicator light will flash or remain on. When the engine is off, the indicator light will flash or go out. Compared to the indicator lights on the dashboard, the vehicle system display can provide a more detailed engine status display function, such as the engine speed, temperature, fuel consumption and other information. By detecting the above information on the vehicle system display, it can be determined whether the engine is in operation.

[0040] It should be noted that the above example is only a preferred implementation of the embodiment of the present invention, and does not limit the above-mentioned method for judging the power-on status of the vehicle and the working status of the engine. It is only an example. As long as it is a method for judging the power-on status of the vehicle and a method for judging the operating status of the engine, they are within the protection scope of the embodiment of the present invention, and no examples will be given here one by one.

[0041] Step S104 , in response to the working state being the running state, controlling a heating system in the after-treatment system of the engine to heat the selective catalytic reduction after-processor in the after-treatment system.

[0042] In the technical solution provided in the above step S104 of the present invention, when the vehicle is in a powered-on state, after obtaining the working state of the engine in the vehicle, it can be determined whether the working state is a running state. If the working state is in a running state, the heating system in the post-processing system can be controlled to heat the SCR post-processor in the post-processing system.

[0043] In this embodiment, the post-treatment system of the above-mentioned engine can be used to process the gas generated by the engine, that is, the harmful gases and harmful substances in the gas can be filtered and the filtered gas can be discharged. For example, the nitrogen oxides in the gas generated by the engine can be converted into nitrogen and water. The gas can also be called waste gas or tail gas. The harmful gases and harmful substances can be collectively referred to as pollutants. The harmful gases can include carbon monoxide, nitrogen oxides, and hydrocarbons. The harmful substances can include particulate matter.

[0044] Optionally, the post-treatment system may include: urea tank, urea pump, urea nozzle, urea injection controller (Diesel Control Unit, referred to as DCU), urea delivery pipeline, oxidation catalyst (Diesel Oxidation Catalyst, referred to as DOC), SCR post-processor and pipeline components. Among them, the urea aqueous solution can be decomposed into ammonia and carbon dioxide after entering the SCR post-processor. Ammonia reacts with nitrogen oxides in the exhaust gas to generate nitrogen and water vapor, thereby converting harmful nitrogen oxides into harmless substances. DCU can control the injection amount of urea aqueous solution to ensure the normal operation of the SCR post-processor. DOC can be used to oxidize carbon monoxide and hydrogen in the exhaust gas into carbon dioxide and water vapor to reduce the emission of harmful gases.

[0045] Optionally, by adding a heating system to the above-mentioned post-treatment system and connecting it to the SCR post-processor, the SCR post-processor can be heated to a suitable temperature so that it can more effectively convert nitrogen oxides into harmless substances, thereby reducing the emission of nitrogen oxides in the exhaust gas.

[0046] Optionally, when the vehicle is powered on, the operating status information of the engine can be obtained in real time. If the engine status information indicates that the engine is in an operating state, the heating system control mode is entered. After obtaining the information that the engine is in an operating state, the heating system is started to perform a heating operation to heat the SCR post-processor in the post-treatment system, ensuring that the SCR post-processor after the heating operation can quickly reach a suitable temperature so as to effectively treat harmful gases in the exhaust gas generated by the engine.

[0047] In the embodiment of the present invention, a heating system can be added to the post-processing system to heat the exhaust gas temperature in the SCR post-processor. By controlling the heating system, its normal operation can be better ensured and sufficient heat can be provided to the SCR post-processor, so that the SCR post-processor reaches the operating temperature faster, avoiding the failure of the SCR post-processor, thereby better achieving the purpose of exhaust gas purification, and then achieving the technical effect of effectively ensuring the normal operation of the post-processing system.

[0048] Step S106 , in response to the temperature in the heated selective catalytic reduction post-processor being greater than or equal to a temperature threshold and / or the working state being converted from a running state to a stopped state, controlling the heating system to stop heating the selective catalytic reduction post-processor.

[0049] In the technical solution provided in the above step S106 of the present invention, when the vehicle is in a powered-on state, after obtaining the working state of the engine in the vehicle, when the working state of the engine is in a running state, the heating system in the post-processing system of the engine is controlled to heat the selective catalytic reduction post-processor in the post-processing system. When the temperature in the heated selective catalytic reduction post-processor is greater than or equal to the temperature threshold, and / or the working state is converted from the running state to the stopped state, the heating system is controlled to stop heating the selective catalytic reduction post-processor.

[0050] In this embodiment, the stop state in the technical solution of step S106 can also be called the flameout state. The temperature threshold can be used to indicate that the temperature in the post-processor has reached a critical value at which heating can be stopped, which can be represented by T1. The temperature threshold can be a preset temperature value, or a temperature value set according to the actual situation of the SCR post-processor. For example, it can be preset to 220°C.

[0051] It should be noted that the setting method and specific values ​​of the above-mentioned temperature thresholds are only for illustration and are not specifically limited here. As long as the temperature can enable the SCR post-processor to work normally / the temperature that causes the heating system to stop heating the SCR post-processor is within the protection scope of the embodiments of the present invention.

[0052] In this embodiment, the temperature of the heated SCR post-processor is greater than or equal to the temperature threshold, and the heating system is controlled to stop heating the SCR post-processor. When the temperature of the SCR post-processor exceeds the set temperature threshold, the SCR post-processor will be overheated or damaged. When the temperature exceeds the threshold, the heating system is stopped to ensure that the SCR post-processor operates within a safe temperature range, avoid damage to the SCR post-processor caused by overheating, and maintain the normal operation of the post-processing system.

[0053] Optionally, if the working state of the engine is converted from the running state to the stopping state, that is, the engine is in the flameout state, the vehicle will not be able to operate because the engine no longer provides power, that is, no longer generates power to drive the vehicle. In this state, the post-treatment system no longer generates exhaust gas that needs to be treated, and the heating system can stop working.

[0054] Optionally, when the temperature is below a certain value, in the after-treatment system, ammonia will preferentially react with nitrogen dioxide (NO2) in the exhaust gas to form solids, thereby blocking the catalyst carrier and causing the after-treatment system to malfunction.

[0055] In this embodiment, on the one hand, the temperature in the heated SCR post-processor is greater than or equal to the temperature threshold, and the working state is converted from the running state to the stopping state, and the heating system is controlled to stop heating the SCR post-processor. Stopping the operation of the heating system can prevent the SCR post-processor from further increasing in temperature, so as to protect the SCR post-processor from damage.

[0056] In this embodiment, on the other hand, when the temperature of the heated SCR post-processor is greater than or equal to the temperature threshold, the SCR post-processor is prone to overheating or damage. Alternatively, the engine is in a flameout state and no longer generates exhaust gas that needs to be treated. If at least one of the above two situations occurs, the heating system can be controlled to stop heating the SCR post-processor, thereby avoiding overheating or damage to the SCR post-processor and extending the life of the heating system.

[0057] In summary, in the embodiment of the present invention, based on the temperature in the heated SCR post-processor being greater than or equal to the temperature threshold, and / or when the engine is in the off state, the heating system is controlled to stop heating the SCR post-processor. That is, after the SCR post-processor reaches the temperature at which it can work effectively (temperature threshold T1), and / or when the engine's working state is converted from the running state to the stopped state, the heating system promptly stops heating the SCR post-processor. This ensures that once the SCR post-processor reaches the necessary operating temperature, the heating system stops heating to avoid damage to the SCR post-processor caused by overheating. At the same time, it ensures that NO XThe efficiency of the reduction reaction. In addition, stopping the heating system can also ensure that no excessive hydrocarbons, carbon monoxide and hydrogen are produced when the engine is stopped. By accurately controlling the working time of the heating system, that is, shutting down the heating system in time when heating is not needed, unnecessary energy consumption can be significantly reduced and the energy efficiency of the entire after-treatment system can be improved. Avoiding continued heating after the engine stops running can prevent potential safety hazards, such as fires and other accidents caused by overheating. In addition, stopping heating when the temperature reaches the threshold also helps to maintain the heating system within a safe operating temperature range, thereby ensuring the safe and stable operation of the vehicle's equipment and improving energy utilization efficiency, so as to achieve the purpose of controlling the heating system to heat or not heat, thereby achieving the technical effect of effectively ensuring the normal operation of the after-treatment system.

[0058] In the above steps S102 to S106 of the present invention, if the heating system needs to be controlled, the working state of the engine in the vehicle can be obtained when the vehicle is in the power-on state. If the working state of the engine is the running state, the heating system in the post-processing system of the engine can be controlled to heat the SCR post-processor to avoid the influence of temperature on the operation of the post-processing system in the related technology and reduce the probability of failure of the SCR post-processor. During the heating process, the temperature in the SCR post-processor and the working state of the engine can be detected in real time. If the temperature in the SCR post-processor is greater than or equal to the temperature threshold, and / or the working state is converted from the running state to the stopping state, the heating system is controlled to stop heating the SCR post-processor. In this embodiment, a heating system can be added to the SCR post-processor in the post-processing system to achieve the technical effect of effectively ensuring the normal operation of the post-processing system, thereby solving the technical problem that the normal operation of the post-processing system cannot be effectively ensured.

[0059] The embodiments of the present invention are further described below in combination with the above steps.

[0060] As an optional implementation method, step S102, when the vehicle is in a powered-on state, obtains the working state of the engine in the vehicle, including: collecting the operating parameters of the engine through the electronic control unit in the vehicle, and sending the operating parameters to the urea injection controller in the post-treatment system; controlling the urea injection controller to determine the working state based on the operating parameters.

[0061] In this embodiment, when the vehicle is powered on, in the process of obtaining the working state of the engine in the vehicle, the operating parameters of the engine can be collected through the electronic control unit in the vehicle, and the operating parameters can be sent to the urea injection controller in the post-treatment system. The urea injection controller can be controlled to determine the working state based on the operating parameters. Among them, the Electronic Control Unit (ECU) is a microprocessor control device for controlling and managing various electronic systems in the vehicle. The ECU can monitor and collect the operating parameters of the engine in real time through sensors connected to the engine. For example, engine speed, engine torque, etc.

[0062] Optionally, the ECU and DCU can be connected via a wiring harness. The ECU sends the collected engine operating parameters to the DCU, and transmits the data through the vehicle's internal communication network, such as the Controller Area Network (CAN) bus, or other communication methods. After receiving the engine's operating parameters, the DCU determines the current working state based on these parameters. For example, engine load, speed, etc., and the injection amount of urea aqueous solution.

[0063] As an optional embodiment, when the vehicle is in a powered-on state, after obtaining the working state of the engine in the vehicle, the method also includes: in response to the working state being a running state, using a temperature sensor corresponding to the selective catalytic reduction post-processor to collect the temperature inside the carrier of the selective catalytic reduction post-processor.

[0064] In this embodiment, after the vehicle is powered on and the working state of the engine in the vehicle is obtained, when the working state of the engine is in the running state, the temperature in the carrier of the SCR post-processor can be collected using a temperature sensor corresponding to the SCR post-processor. The temperature sensor can be a thermocouple, a resistance temperature detector, or a thermistor, and the accuracy of the temperature sensor can be within ±5°C.

[0065] It should be noted that the selection of the above-mentioned temperature sensor is only for illustration and is not specifically limited here. As long as it is a temperature sensor that can collect the temperature inside the carrier of the SCR post-processor, it is within the protection scope of the embodiment of the present invention.

[0066] Optionally, according to the determined working state, the urea injection controller can adjust the injection amount of urea to ensure that the urea in the SCR system and the NO in the exhaust gas are X The reaction is complete, converting it into harmless nitrogen and water vapor.

[0067] Optionally, by collecting temperature data in the SCR post-processor carrier, the temperature change in the SCR post-processor carrier can be monitored in real time to determine the working state and heat distribution of the post-processing system. According to the temperature data collected by the temperature sensor, the operating parameters of the post-processing system can be adjusted. For example, urea injection amount, heating system control, etc. To ensure that the SCR system operates within a suitable temperature range. By timely collecting temperature data and adjusting whether the heating system is heated, the SCR post-processor can be prevented from overheating.

[0068] As an optional embodiment, step S104, in response to the working state being the running state, controls the heating system in the after-treatment system of the engine, wherein the heating system includes an air filter element, an air suction pump, a heater and a one-way valve, the air filter element is used to filter the air entering the heating system, the air suction pump is used to send the air into the heater, the heater is used to heat the air, and the one-way valve is used to transfer the heated air to the selective catalytic reduction after-processor.

[0069] In this embodiment, the air filter element can filter the air entering the heating system to ensure the cleanliness of the air, and send the clean air to the air extraction pump. The air extraction pump can generate airflow to send the air to the heater. The heater can heat the air and transfer the heat to the SCR carrier or SCR catalyst in the SCR post-processor to increase the temperature. The heater can control the heating temperature and time through the control unit.

[0070] Optionally, the air filter is a device used to filter the air entering the device or system to remove impurities, particulate matter and pollutants in the air. For example, filter the air entering the heating system. The vacuum pump is used to generate airflow, pump gas from one place to another, promote gas flow, and achieve normal operation of the equipment. For example, in a heating system, the gas from the air filter to the heater is pumped. The heater is a device used to heat air, liquid or solid, and converts it into heat energy through electricity, gas or other forms of energy to increase the temperature of the substance. For example, the temperature inside the heating system is increased by heating the air to ensure the normal operation of the heating system and the progress of the reaction. A one-way valve is a valve that has the characteristic of allowing fluid to flow in only one direction, and is used to control the flow direction of the gas to ensure that the gas flows in the system in the set direction. For example, in a heating system, the heated air is controlled by a one-way valve to be transmitted to the SCR post-processor through the gas pipeline.

[0071] Optionally, the air filter element can be made of high-efficiency filter material or multi-layer filter material. The vacuum pump can be a high-performance DC electric vacuum pump or an AC electric vacuum pump. The heater can be an electric heater. The one-way valve can be made of stainless steel or ceramic. It should be noted that the selection and materials of the components of the above-mentioned heating system are only for illustrative purposes and are not specifically limited here. As long as the components can heat the SCR post-treatment system, they are within the protection scope of the embodiments of the present invention.

[0072] In the process of controlling the heating system in the aftertreatment system of the engine, there is a certain connection method between the various components in the heating system and the aftertreatment system.

[0073] As an optional embodiment, one end of the air pump is connected to the urea injection controller in the after-treatment system through a wiring harness, the other end of the air pump is connected to the power supply in the vehicle through a wiring harness, one end of the heater is connected to the urea injection controller through a wiring harness, and the other end of the heater is connected to the power supply through a wiring harness, wherein, before controlling the heating system in the after-treatment system of the engine to heat the selective catalytic reduction after-processor in the after-treatment system, it also includes: in response to the working state being the running state, controlling the urea injection controller to respectively turn on the wiring harnesses corresponding to the air pump and the heater, so as to control the power supply to provide power to the air pump and the heater, so that the air pump and the heater are in the running state.

[0074] In this embodiment, one end of the heater can be connected to the power supply through the vehicle wiring harness, and the other end is connected to the DCU. One end of the air extraction pump is connected to the power supply through the vehicle wiring harness, and the other end is connected to the DCU. Before the heating system in the after-treatment system of the engine is controlled to heat the SCR after-processor in the after-treatment system, when the working state is the running state, the DCU can be controlled to respectively conduct the wiring harnesses corresponding to the air extraction pump and the heater to control the power supply to provide power to the air extraction pump and the heater, so that the air extraction pump and the heater are in the running state.

[0075] Optionally, one end of the vacuum pump and heater is connected to the DCU via a wiring harness. The DCU can drive the circuit of the vacuum pump and heater to be turned on by sending a control signal to start working. The other end of the vacuum pump and heater is connected to the vehicle power supply via a wiring harness to ensure that they can obtain sufficient power when started under the control of the DCU. The wiring harness electrically connects the vacuum pump and heater to the DCU and the vehicle power supply, so that the DCU can control the circuit of the vacuum pump and heater through the wiring harness, thereby controlling their start and stop.

[0076] Optionally, when the engine is in operation, the DCU responds to the operation state by conducting the wiring harness connected to the air extraction pump and the heater, so that the power supply provides power to the air extraction pump and the heater, thereby putting the air extraction pump and the heater into operation. Through the above method, the heating system can control the heating of the SCR post-processor to ensure that the post-processing system can work effectively even in a low temperature environment.

[0077] After the air extraction pump and the heater are in operation, the heating system heats the SCR after-processor.

[0078] As an optional embodiment, step S104, in response to the working state being the running state, controls the heating system in the after-treatment system of the engine to heat the selective catalytic reduction after-processor in the after-treatment system, including: in response to the working state being the running state, and the air extraction pump and the heater being in the running state, controls the air to enter the air filter element through the gas pipeline, and filters the air by using the air filter element; generates an air flow by using the air extraction pump, and sends the filtered air to the heater through the gas pipeline; heats the incoming air by using the heater, and sends the heated air to the one-way valve through the gas pipeline; transmits the heated gas to the selective catalytic reduction after-processor through the gas pipeline through the one-way valve to heat the selective catalytic reduction after-processor.

[0079] In this embodiment, during the heating of the SCR post-processor, the air can be controlled to enter the air filter through the gas pipeline based on the engine working state being in the running state, and the air extraction pump and the heater being in the running state, and the air can be filtered by the air filter. The airflow can be generated by the air extraction pump, and the filtered air can be sent to the heater through the gas pipeline. The incoming air can be heated by the heater, and the heated air can be sent to the one-way valve through the gas pipeline. The heated gas can be transmitted to the SCR post-processor through the gas pipeline through the one-way valve, and finally the SCR post-processor is heated. When the vehicle is powered on, the air extraction pump and the heater are in the off state by default. The DCU communicates with the ECU through the CAN bus to obtain the running state of the engine. When the DCU determines that the engine is in the running state, the DCU conducts the circuit and starts the air extraction pump and the heater. When the DCU determines that the engine is not in the running state, the circuit is not conducted, and the heater and the air extraction pump do not work.

[0080] Optionally, when the heating system responds to the engine's operating state as running, and the air extraction pump and the heater are also confirmed to be in the running state, the air first enters the air filter through the gas pipeline, and the air filter filters the impurities in the air to ensure that the air sent to the heating system is clean. The filtered air is further processed by the air extraction pump, and the air extraction pump generates airflow and sends the air to the heater through the gas pipeline to provide the necessary air flow for the heating process. After the air enters the heater, the heater uses energy, such as electrical energy, to heat the air, and the temperature of the heated air is increased, providing a heat source for the heating of the post-processor. The heated air is sent to the one-way valve through the gas pipeline to ensure that the air can only flow in one direction, that is, it can only flow into the SCR post-processor to prevent the air or heated gas from flowing back and affecting the normal operation of the heating system. Finally, the heated gas is controlled by the one-way valve to be transmitted to the SCR post-processor through the gas pipeline, and the temperature of the post-processor is increased by using this part of the hot gas. Ensure that it is within the normal working temperature range, so as to effectively treat the exhaust gas and reduce harmful gas emissions.

[0081] After the heating system heats the SCR post-processor, the heating system is controlled to stop heating.

[0082] As an optional embodiment, step S106, in response to the temperature in the selective catalytic reduction afterprocessor after heating being greater than or equal to a temperature threshold, and / or the working state is converted from a running state to a stopped state, controls the heating system to stop heating the selective catalytic reduction afterprocessor, including: in response to the temperature in the selective catalytic reduction afterprocessor after heating being greater than or equal to a temperature threshold, and / or the working state is converted from a running state to a stopped state, controls the urea injection controller to disconnect the wiring harnesses corresponding to the air extraction pump and the heater respectively, so as to control the power supply to disconnect the power supplied to the air extraction pump and the heater, so that the air extraction pump and the heater stop heating the selective catalytic reduction afterprocessor.

[0083] In this embodiment, in the process of controlling the heating system to stop heating the SCR post-processor, when the temperature in the heated SCR post-processor is greater than or equal to the temperature threshold, and / or the working state is converted from the running state to the stopping state, the DCU can be controlled to disconnect the wiring harnesses corresponding to the air extraction pump and the heater respectively, and the power supply can be controlled to disconnect the power provided to the air extraction pump and the heater, so that the air extraction pump and the heater can stop heating the SCR post-processor. That is, the DCU continues to obtain the running state of the engine through the CAN bus, and obtains the temperature inside the SCR carrier in the SCR post-processor through the carrier temperature sensor. When the engine is in the off state, and / or the temperature inside the SCR carrier is greater than or equal to the temperature threshold, the DCU disconnects the circuit and turns off the air extraction pump and the heater. It can be achieved that when the temperature of the SCR post-processor reaches a certain threshold, and / or the working state is converted to the stopping state, the heating system stops heating the post-processor in time, protects the equipment from overheating damage, and ensures the normal operation of the post-processing system.

[0084] In an embodiment of the present invention, when the vehicle is in a powered-on state, the working state of the engine in the vehicle is obtained; in response to the working state being the running state, the heating system in the after-treatment system of the engine is controlled to heat the selective catalytic reduction after-processor in the after-treatment system, wherein the selective catalytic reduction after-processor is used to convert nitrogen oxides in the gas generated by the engine into nitrogen and water; in response to the temperature in the heated selective catalytic reduction after-processor being greater than or equal to a temperature threshold, and / or the working state is converted from the running state to the stopping state, the heating system is controlled to stop heating the selective catalytic reduction after-processor, thereby achieving the purpose of controlling the heating system to heat or stop heating, thereby solving the technical problem of being unable to effectively ensure the normal operation of the after-treatment system, and achieving the technical effect of effectively ensuring the normal operation of the after-treatment system.

[0085] The embodiment of the present invention further provides a heating system in a post-processing system. It should be noted that the heating system in the post-processing system can be used to execute the control method of the heating system in the post-processing system in the above embodiment of the present invention.

[0086] Figure 2 is a schematic diagram of a heating system in a post-processing system according to an embodiment of the present invention. Figure 2 As shown, the heating system 200 in the aftertreatment system may include: an air filter element 202 , an air extraction pump 204 , a heater 206 and a one-way valve 208 .

[0087] The air filter element 202 is used for filtering the air entering the heating system and transmitting the filtered air to the air pump through the gas pipeline.

[0088] The vacuum pump 204 is used to generate an air flow to deliver the filtered air into the heater through the gas pipeline.

[0089] The heater 206 is used to heat the air entering the heater and transmit the heated air to the one-way valve through the gas pipeline.

[0090] The one-way valve 208 is used to heat the selective catalytic reduction after-processor by transmitting the heated air to the selective catalytic reduction after-processor through the gas pipeline.

[0091] In the embodiment of the present invention, the air entering the heating system is filtered by the air filter element 202, and the filtered air is transmitted to the air pump 204 through the gas pipeline. The airflow is generated by the air pump 204, and the filtered air is sent to the heater 206 through the gas pipeline. The air entering the heater 206 is heated by the heater 206, and the heated air is transmitted to the one-way valve 208 through the gas pipeline. The heated air is transmitted to the SCR post-processor through the gas pipeline through the one-way valve 208 to heat the SCR post-processor. In this embodiment, a heating system can be added to the SCR post-processor in the post-processing system to achieve the technical effect of effectively ensuring the normal operation of the post-processing system, thereby solving the technical problem that the normal operation of the post-processing system cannot be effectively ensured.

[0092] The technical solution of the embodiment of the present invention is illustrated below in conjunction with preferred implementation modes.

[0093] At present, hydrogen engines used in passenger cars are still in the research stage both at home and abroad, and their aftertreatment systems are an important part of achieving near-zero emissions. The main pollutants emitted by hydrogen engines are NO X , accompanied by small amounts of HC, CO and H2. Figure 3 It is a schematic diagram of a hydrogen engine aftertreatment system, such as Figure 3 As shown, the system may include the following components:

[0094] DOC 301, DOC 301 is placed before the SCR post-processor, using precious metals as catalysts to treat hydrocarbons, carbon monoxide and hydrogen in the engine exhaust through oxidation reactions, thereby increasing NO X Improve conversion efficiency and reduce harmful emissions.

[0095] SCR+ASC 302, SCR post-processor is the core component of the post-treatment system, and is equipped with SCR catalyst, such as Cu-based catalyst. After urea solution is injected into the SCR post-processor, it reacts with NO in the high-temperature exhaust gas. X A chemical reaction occurs, converting NO XIt is reduced to nitrogen (N2) and water vapor (H2O), thereby achieving emission purification. In addition, an ammonia slip catalyst (ASC) is configured to treat the incompletely reacted ammonia in the SCR post-treatment system, which can further oxidize the slipped ammonia into nitrogen and water, prevent excessive ammonia from being discharged into the atmosphere, and reduce the impact on the environment.

[0096] DCU 303, DCU 303 communicates with ECU 304 through CAN bus, and monitors the running status of the engine and the temperature of the front end of the SCR post-processor, NO X The injection amount of the urea solution is calculated based on these parameters to control the working states of the urea pump 308 and the urea nozzle 311.

[0097] The ECU 304 is connected to the DCU 303 via a wiring harness.

[0098] The engine 305 is connected to the DOC 301 , and the exhaust gas discharged will pass through the DOC 301 . The catalyst in the DOC 301 will catalytically oxidize carbon monoxide and hydrogen, converting them into harmless carbon dioxide and water vapor.

[0099] The mixer 306 mixes the urea solution with the exhaust gas to ensure that an appropriate amount of urea solution reacts with NOx while maintaining the normal operation of the SCR+ASC 302 .

[0100] Urea tank 307 can store urea solution. Urea solution is a commonly used reducing agent that reacts with NO in the SCR process. X The urea tank 307 usually has a large enough volume to ensure sufficient supply of urea solution during long-term operation.

[0101] The urea pump 308 extracts urea solution from the urea tank 307 and delivers it to the urea nozzle 311. The working pressure and flow rate of the urea pump 308 need to be precisely controlled according to the working conditions of the engine 305 to ensure that the urea solution can be injected into the exhaust gas flow in a correct proportion.

[0102] The CAN box 309 is connected to the CAN bus and is used to connect and manage different control units on the CAN bus and provide data transmission and communication functions.

[0103] The urea liquid circuit 310, which is composed of a urea tank 307, a urea pump 308, a urea nozzle 311 and a urea pipeline, can timely and accurately inject urea to perform a catalytic reduction reaction, effectively reduce NOx emissions, and thus improve the efficiency and effect of the entire post-treatment system.

[0104] The urea nozzle 311 is placed at the entrance of the SCR post-processor. It is responsible for atomizing and injecting the urea solution into the exhaust flow. The design of the urea nozzle 311 needs to take into account the atomization effect of the urea solution to ensure that the urea solution and NO in the exhaust flow are separated. X Able to mix thoroughly.

[0105] Alternatively, if Figure 3 As shown, the system also includes a urea pipeline, which connects the urea tank 307, the urea pump 308 and the urea nozzle 311, to ensure that the urea solution can be smoothly transported from the urea tank 307 to the urea nozzle 311. The urea pipeline material needs to be corrosion-resistant to prevent the urea solution from corroding the pipeline. The system also includes a post-treatment system pipeline, which connects the engine exhaust port with the DOC 301, the DOC 301 with the SCR post-processor, and the SCR post-processor with the exhaust tail pipe, to ensure that the exhaust gas can smoothly pass through each processing component. The various components in the system cooperate with each other to achieve effective treatment of hydrogen engine emissions.

[0106] However, the SCR post-processor needs to integrate sensors, nozzles and other parts, and its outer dimensions are relatively large, which requires a high layout space. Since the layout space of passenger cars is relatively compact, there may be a situation where the pipeline from the engine to the SCR post-processor is long due to insufficient layout space. In this case, the exhaust gas discharged by the engine has a relatively large heat loss before entering the SCR post-processor, and the temperature drops by more than 100°C at any time. When the internal temperature of the SCR is lower than 200°C, the ammonia released by the decomposition of urea will preferentially react with NO2 to form solids, thereby blocking the catalyst carrier. Therefore, urea is generally not sprayed in the post-treatment system below 200°C. The exhaust temperature range of hydrogen engines is in the temperature range of 275~500°C. Therefore, there may be some operating conditions, such as cold start conditions, when the SCR temperature is lower than 200°C and the post-treatment system does not work. Therefore, there is still a technical problem that cannot effectively ensure the normal operation of the post-treatment system.

[0107] The embodiment of the present invention proposes a control method for a heating system in a post-processing system to solve the problem that the post-processing system is prone to malfunction due to low temperature. That is, in the process of the engine's post-processor treating the exhaust gas, before the exhaust gas enters the SCR post-processor, the heat loss is relatively large. When the temperature is lower than a certain value, ammonia will preferentially react with NO2 in the exhaust gas to generate solids, thereby blocking the catalyst carrier and causing the problem of malfunction of the post-processing system. By adding a heating system to the post-processor, the heater and the vacuum pump in the heating system can heat the SCR post-processor to prevent the exhaust gas from dropping too low in temperature before entering the SCR post-processor. In the above manner, the generation of solids during the exhaust gas treatment process can be avoided, which may cause the post-processing system to malfunction. Thereby achieving the technical effect of effectively ensuring the normal operation of the post-processing system and solving the technical problem of being unable to effectively ensure the normal operation of the post-processing system.

[0108] The embodiments of the present invention are further described below.

[0109] In this embodiment, Figure 4 is a schematic diagram of a post-processing heating system according to an embodiment of the present invention. Figure 4 As shown, the post-treatment heating system 400 includes: an air filter element 401 , an air extraction pump 402 , an electric heater 403 and a one-way valve 404 .

[0110] like Figure 4 As shown, the fresh air entering the heating system is filtered by the air filter 401, and the filtered air is transmitted to the air pump 402 through the gas pipeline. The air pump 402 extracts the air filtered by the air filter 401 and transmits it to the electric heater 403. The air pump 402 is connected to the power supply through the vehicle wiring harness, and is connected to the DCU through the wiring harness to realize the opening and closing control of the air pump 402. The electric heater 403 heats the air entering the electric heater 403, and transmits the heated air to the one-way valve 404 through the gas pipeline. The electric heater 403 is also connected to the power supply through the vehicle wiring harness, and is connected to the DCU through the wiring harness to realize the opening and closing control of the electric heater 403. The one-way valve 404 transmits the heated air to the SCR post-processor through the gas pipeline to heat the SCR post-processor.

[0111] Optionally, the DCU serves as the control center of the entire post-processing heating system, and communicates with the ECU through a wiring harness connected to the CAN bus to obtain the operating parameters of the engine. At the same time, the DCU is connected to the electric heater 403 and the air extraction pump 402 through the wiring harness. According to the engine operating state and the feedback of the temperature sensor in the SCR carrier, the electric heater 403 and the air extraction pump 402 are controlled to be turned on and off to achieve temperature control of the SCR post-processor.

[0112] Optionally, the working state of the electric heater 403 is realized by the DCU through the on-off control circuit. When the heating conditions are met, the DCU will turn on the circuit and start the electric heater 403. When the engine is not in operation or the temperature in the SCR carrier reaches a preset value T1, the DCU will disconnect the circuit and turn off the electric heater 403. This ensures that the heating system is started when necessary, avoids unnecessary energy consumption, and improves the efficiency and reliability of the post-treatment system.

[0113] In summary, by adding a heating system to the SCR post-processor in the post-processing system, the technical effect of effectively ensuring the normal operation of the post-processing system is achieved, and the technical problem of being unable to effectively ensure the normal operation of the post-processing system is solved.

[0114] Figure 5is a schematic diagram of a functional interface according to an embodiment of the present invention, showing the interface connection relationship between various functional components, such as Figure 5 As shown, the interfaces between the various functional components may include: a urea injection controller 502 , an electric heater 504 , and an air extraction pump 506 .

[0115] Alternatively, if Figure 5 As shown, the air pump 502 is used to extract the air filtered by the air filter element and deliver it to the electric heater 504. The air pump 506 is connected to the DCU through a control line to realize the on and off control of the air pump. The electric heater is used to heat the air delivered by the air pump, and is connected to the urea injection controller through a control line and grounded to realize the on and off control of the heater. The urea injection controller is connected to the electric heater and the air pump through a control line and grounded.

[0116] Figure 6 : is a flow chart of a control method of a post-treatment heating system of a hydrogen internal combustion engine passenger vehicle according to an embodiment of the present invention. Figure 6 As shown, the method may include the following steps:

[0117] Step S601, controlling the whole vehicle to be powered on.

[0118] In this embodiment, the vehicle's electrical system can be turned on by inserting the vehicle key and turning the start switch, thereby controlling the entire vehicle to be powered on.

[0119] Step S602, in response to the vehicle being powered on successfully, obtaining engine parameters.

[0120] In this embodiment, after the vehicle is powered on successfully, the DCU communicates with the ECU through the vehicle network to obtain the real-time operating parameters of the engine, including but not limited to the engine speed, torque, intake mass flow, etc.

[0121] Step S603: Based on the engine parameters, determine whether the engine is in a running state.

[0122] In this embodiment, the engine operating parameters received by the DCU are used to determine whether the engine is in the operating state. If the engine is in the operating state, step S604 is executed. Otherwise, step S602 is executed.

[0123] Optionally, when the vehicle is started, the DCU obtains the engine speed and torque information from the ECU via the CAN bus. For example, if the speed is greater than 0 and the torque is greater than 0, the DCU determines that the engine is in a running state.

[0124] Step S604, controlling the DCU closed circuit to drive the heater and the air pump to operate.

[0125] In this embodiment, in response to the engine operating state being the running state, the DCU closes the circuit to drive the heater and the air extraction pump to operate.

[0126] Step S605: During the heating process, the engine parameters and the temperature inside the SCR carrier are collected in real time.

[0127] In this embodiment, the DCU exchanges data with the ECU via the CAN bus to obtain the operating status information of the engine. At the same time, the DCU collects the temperature inside the SCR carrier through a carrier temperature sensor connected to the SCR post-processor.

[0128] Optionally, the carrier temperature sensor is installed inside the SCR post-processor and connected to the DCU through the vehicle wiring harness to transmit the temperature data of the SCR carrier in real time.

[0129] Step S606, determining whether the engine is in a flameout state, and / or whether the temperature inside the SCR carrier is greater than or equal to T1.

[0130] In this embodiment, based on the engine parameters and the temperature inside the SCR carrier read in step S605, the working state of the engine and the temperature inside the SCR carrier are judged to determine whether the engine is in a flameout state and / or the temperature inside the SCR carrier is greater than or equal to a temperature threshold. If any of the conditions that the engine is in a flameout state and the temperature inside the SCR carrier is greater than or equal to T1 is met, step S606 is executed. Otherwise, step S605 is executed.

[0131] Step S606, controlling the DCU to close the circuit to drive the heater and the air pump to work.

[0132] In this embodiment, when the engine is in a flameout state and / or the temperature inside the SCR carrier is greater than or equal to the temperature threshold, the DCU will disconnect the circuit, turn off the heater and the air extraction pump, and stop the operation of the heating system to ensure that the heating system performs heating work only under necessary conditions, thereby saving energy to the greatest extent, avoiding unnecessary heating operations, and protecting the effectiveness and energy efficiency of the system.

[0133] In the embodiment of the present invention, the DCU not only obtains the working status of the engine through the ECU, but also, when the engine operating parameters received by the DCU indicate that the engine is in the running state and the temperature detected by the carrier temperature sensor is lower than the preset starting temperature T1, the DCU will turn on the circuit where the heating system is located, start the air extraction pump and the heater, and preheat the exhaust gas entering the SCR post-processor to ensure that the working temperature of the SCR post-processor can quickly reach a temperature that can effectively process NO Xtemperature range. After the heating system is started, the DCU will continuously monitor the engine's operating status and the temperature of the SCR carrier. If the engine stops running or the carrier temperature reaches or exceeds T1, the DCU will automatically disconnect the circuit and stop the operation of the heating system to avoid unnecessary energy consumption. By precisely controlling the heating of the heater, the DCU can ensure that the temperature of the SCR post-processor can quickly and stably reach T1. In this way, the exhaust gas emitted by the hydrogen engine can be effectively treated under various working conditions, the post-treatment system can be quickly started, and the emission of harmful gases can be reduced. In order to achieve the technical effect of effectively ensuring the normal operation of the post-treatment system, the technical problem of being unable to effectively ensure the normal operation of the post-treatment system is solved.

[0134] According to an embodiment of the present invention, a control device for a heating system in a post-processing system is further provided. It should be noted that the control device for a heating system in a post-processing system is used to execute the control method for a heating system in a post-processing system in the above embodiment.

[0135] Figure 7 Schematic diagram of a control device for a heating system in a post-processing system according to an embodiment of the present invention. Figure 7 As shown, the device 700 may include: an acquisition unit 702 , a first control unit 704 , and a second control unit 706 .

[0136] The acquisition unit 702 is used to acquire the working state of the engine in the vehicle when the vehicle is in a powered-on state.

[0137] The first control unit 704 is used to control the heating system in the after-treatment system of the engine in response to the working state being the running state, so as to heat the selective catalytic reduction after-processor in the after-treatment system, wherein the selective catalytic reduction after-processor is used to convert nitrogen oxides in the gas generated by the engine into nitrogen and water.

[0138] The second control unit 706 is configured to control the heating system to stop heating the selective catalytic reduction post-processor in response to the temperature in the heated selective catalytic reduction post-processor being greater than or equal to a temperature threshold and / or the working state being switched from a running state to a stopped state.

[0139] Optionally, the device may further include: a collection unit for collecting the temperature inside the carrier of the selective catalytic reduction post-processor using a temperature sensor corresponding to the selective catalytic reduction post-processor in response to the working state being the running state.

[0140] Optionally, the device may also include: a third control unit, for controlling the urea injection controller to respectively connect the wiring harnesses corresponding to the air extraction pump and the heater in response to the working state being the running state, so as to control the power supply to provide power to the air extraction pump and the heater, so that the air extraction pump and the heater are in the running state.

[0141] Optionally, the acquisition unit 702 may include: a collection module, used to collect engine operating parameters through an electronic control unit in the vehicle, and send the collected operating parameters to a urea injection controller in the post-treatment system; a determination module, used to control the urea injection controller to determine the working state based on the operating parameters.

[0142] Optionally, the first control unit 704 may include: a first control module, used to control the air to enter the air filter through the gas pipeline in response to the working state being the running state, and the vacuum pump and the heater being in the running state, and filter the air using the air filter; a second control module, used to generate an airflow through the vacuum pump, and send the filtered air into the heater through the gas pipeline; a third control module, used to heat the incoming air using the heater, and send the heated air into the one-way valve through the gas pipeline; a fourth control module, used to transmit the heated gas through the gas pipeline to the selective catalytic reduction post-processor through the one-way valve to heat the selective catalytic reduction post-processor.

[0143] Optionally, the second control unit 706 may include: a fifth control module, which is used to control the urea injection controller to disconnect the wiring harnesses corresponding to the air pump and the heater respectively in response to the temperature in the heated selective catalytic reduction after-processor being greater than or equal to a temperature threshold, and / or the working state is converted from a running state to a stopped state, so as to control the power supply to disconnect the power supplied to the air pump and the heater, so that the air pump and the heater stop heating the selective catalytic reduction after-processor.

[0144] In the embodiment of the present invention, the working state of the engine in the vehicle is obtained by the acquisition unit 702 when the vehicle is in the power-on state; the first control unit 704 controls the heating system in the after-treatment system of the engine in response to the working state being the running state, so as to heat the selective catalytic reduction after-processor in the after-treatment system, wherein the selective catalytic reduction after-processor is used to convert nitrogen oxides in the gas generated by the engine into nitrogen and water; the second control unit 706 controls the heating system to stop heating the selective catalytic reduction after-processor in response to the temperature in the heated selective catalytic reduction after-processor being greater than or equal to the temperature threshold, and / or the working state is converted from the running state to the stopping state, thereby solving the technical problem that the normal operation of the after-treatment system cannot be effectively guaranteed, and achieving the technical effect of effectively ensuring the normal operation of the after-treatment system.

[0145] According to an embodiment of the present invention, a computer-readable storage medium is further provided. The storage medium includes a stored program, wherein the program executes the control method of the heating system in the post-processing system in the above embodiment.

[0146] According to an embodiment of the present invention, a processor is further provided, which is used to run a program, wherein when the program is run, a method for controlling a heating system in a post-processing system according to an embodiment of the present invention is executed.

[0147] According to an embodiment of the present invention, a computer-readable storage medium is also provided. The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the control method of the heating system in the post-processing system of the embodiment of the present invention.

[0148] According to another aspect of the present invention, a computer program product is provided, which includes a computer program, and when the computer program is executed by a processor, the control method of the heating system in the post-processing system of the present invention is implemented.

[0149] According to an embodiment of the present invention, a vehicle is further provided. The vehicle is used to execute the control method of a heating system in a post-treatment system according to an embodiment of the present invention.

[0150] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0151] In the several embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0152] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0153] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0154] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0155] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for controlling a heating system in a post-processing system, characterized in that: include: When the vehicle is powered on, obtaining the working state of the engine in the vehicle; In response to the working state being the running state, controlling a heating system in the aftertreatment system of the engine to heat a selective catalytic reduction aftertreatment system in the aftertreatment system, wherein the selective catalytic reduction aftertreatment system is used to convert nitrogen oxides in the gas generated by the engine into nitrogen and water; In response to the temperature in the heated selective catalytic reduction after-processor being greater than or equal to a temperature threshold, and / or the working state being converted from the running state to the stopping state, the heating system is controlled to stop heating the selective catalytic reduction after-processor.

2. The method according to claim 1, characterized in that When the vehicle is powered on, obtaining the working state of an engine in the vehicle includes: collecting operating parameters of the engine through an electronic control unit in the vehicle, and sending the operating parameters to a urea injection controller in the post-treatment system; The urea injection controller is controlled to determine the working state based on the operating parameters.

3. The method according to claim 2, characterized in that When the vehicle is powered on, after obtaining the working state of the engine in the vehicle, the method further includes: In response to the working state being the running state, the temperature inside the carrier of the selective catalytic reduction post-processor is collected by using a temperature sensor corresponding to the selective catalytic reduction post-processor.

4. The method according to claim 1, characterized in that: The heating system includes an air filter, an air suction pump, a heater and a one-way valve, wherein the air filter is used to filter the air entering the heating system, the air suction pump is used to send the air into the heater, the heater is used to heat the air, and the one-way valve is used to transfer the heated air to the selective catalytic reduction post-processor.

5. The method according to claim 4, characterized in that One end of the air extraction pump is connected to the urea injection controller in the post-treatment system through a wiring harness, the other end of the air extraction pump is connected to the power supply in the vehicle through the wiring harness, one end of the heater is connected to the urea injection controller through the wiring harness, and the other end of the heater is connected to the power supply through the wiring harness, wherein, before controlling the heating system in the post-treatment system of the engine to heat the selective catalytic reduction post-processor in the post-treatment system, the method further includes: In response to the working state being the running state, the urea injection controller is controlled to respectively turn on the wiring harnesses corresponding to the air extraction pump and the heater, so as to control the power supply to provide power to the air extraction pump and the heater, so that the air extraction pump and the heater are in the running state.

6. The method according to claim 5, characterized in that In response to the working state being the running state, controlling a heating system in the aftertreatment system of the engine to heat a selective catalytic reduction aftertreatment device in the aftertreatment system, comprising: In response to the working state being the running state, and the vacuum pump and the heater being in the running state, controlling the air to enter the air filter element through the gas pipeline, and using the air filter element to filter the air; Generate an air flow by the vacuum pump, and send the filtered air into the heater through the gas pipeline; Using the heater to heat the incoming air, and sending the heated air into the one-way valve through the gas pipeline; The heated gas is transmitted through the one-way valve and the gas pipeline to the selective catalytic reduction post-processor to heat the selective catalytic reduction post-processor.

7. The method according to claim 5, characterized in that In response to the temperature in the heated selective catalytic reduction post-processor being greater than or equal to a temperature threshold, and / or the working state being converted from the running state to the stopping state, controlling the heating system to stop heating the selective catalytic reduction post-processor comprises: In response to the temperature in the heated selective catalytic reduction after-processor being greater than or equal to a temperature threshold, and / or the working state being converted from the running state to the stopping state, the urea injection controller is controlled to disconnect the wiring harnesses corresponding to the air extraction pump and the heater, respectively, so as to control the power supply to disconnect the power supplied to the air extraction pump and the heater, so that the air extraction pump and the heater stop heating the selective catalytic reduction after-processor.

8. A control device for a heating system in a post-processing system, characterized in that: include: an acquisition unit, used for acquiring the working state of an engine in the vehicle when the vehicle is powered on; a first control unit, configured to control a heating system in a post-treatment system of the engine to heat a selective catalytic reduction post-processor in the post-treatment system in response to the working state being a running state, wherein the post-treatment system is configured to convert nitrogen oxides in gas generated by the engine into nitrogen and water; The second control unit is configured to control the heating system to stop heating the selective catalytic reduction post-processor in response to the temperature in the heated selective catalytic reduction post-processor being greater than or equal to a temperature threshold and / or the working state being converted from the running state to the stopping state.

9. A heating system in a post-processing system, characterized in that: The heating system is arranged before the selective catalytic reduction post-processor in the post-processing system, and the heating system comprises: An air filter element, used for filtering the air entering the heating system and transmitting the filtered air to the air extraction pump through a gas pipeline; The air pump is used to generate airflow and send the filtered air into the heater through the gas pipeline; The heater is used to heat the air entering the heater and transmit the heated air to the one-way valve through the gas pipeline; The one-way valve is used to transmit the heated air to the selective catalytic reduction after-processor through the gas pipeline, so as to heat the selective catalytic reduction after-processor.

10. A processor, characterized in that: The processor is used to run a program, wherein the program, when run by the processor, executes the method for controlling a heating system in a post-treatment system according to any one of claims 1 to 7.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method for controlling a heating system in a post-processing system according to any one of claims 1 to 7.

12. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the method for controlling a heating system in a post-treatment system according to any one of claims 1 to 7.

13. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the control method of a heating system in a post-treatment system according to any one of claims 1 to 7.

14. A vehicle, characterized in that: Used to execute the control method of the heating system in the aftertreatment system as described in any one of claims 1 to 7.

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