Post-processing system, control method, related devices and vehicle

Abstract

The application discloses a post-processing system, a control method, related devices and a vehicle, and relates to the field of exhaust treatment, and comprises a methanol supply module, a temperature sensor and an electric heater. The temperature sensor is used to send the collected internal temperature of the three-way catalyst to a post-processing controller; the electric heater is arranged in the three-way catalyst and close to the position of the three-way catalyst inlet, and is powered by the power battery of the vehicle, and starts heating or stops heating under the control of the post-processing controller; and the methanol supply module is used to spray methanol fuel into the three-way catalyst under the control of the post-processing controller. In the state of cold start of the methanol engine and the like, when the internal temperature of the three-way catalyst is low, the internal temperature of the three-way catalyst can be raised by controlling the electric heater and the methanol supply module to cooperate, the speed of the three-way catalyst to reach the suitable working temperature is accelerated, the conversion efficiency is improved, and then the emission of pollutants is reduced.

Description

Technical Field

[0001] This application relates to the field of exhaust gas treatment technology, and in particular to an aftertreatment system, control method, related device and vehicle. Background Technology

[0002] Methanol engines often employ three-way catalytic converters to improve exhaust emissions. The performance of the three-way catalytic converter directly affects carbon monoxide, hydrocarbons, and nitrogen oxides in the exhaust gas, converting harmful gases into harmless carbon dioxide, water, and nitrogen through oxidation-reduction reactions. In hybrid vehicles equipped with methanol engines, to reduce methanol consumption, the methanol engine typically only starts operating when the battery charge is low, and there are also frequent start-stop cycles. This results in numerous cold start phases during operation, during which the three-way catalytic converter heats up slowly, resulting in a lower catalyst temperature and reduced conversion efficiency for gaseous pollutants, ultimately leading to excessive emissions. Summary of the Invention

[0003] In view of the above problems, this application provides an aftertreatment system, control method, related devices, and vehicle to improve the conversion efficiency of a three-way catalytic converter. The specific solution is as follows:

[0004] The first aspect of this application provides an after-processing system, including: a methanol supply module, a temperature sensor, and an electric heater;

[0005] The temperature sensor is used to send the collected internal temperature of the three-way catalytic converter to the after-processing controller;

[0006] The electric heater is located inside the three-way catalytic converter and near the inlet of the three-way catalytic converter. The electric heater uses the vehicle's power battery as a power source. The electric heater is used to start heating or stop heating under the control of the aftertreatment controller.

[0007] The methanol supply module is used to inject methanol fuel into the three-way catalytic converter under the control of the aftertreatment controller.

[0008] In one possible implementation, the methanol supply module includes a methanol tank, a methanol pump, a methanol filter, and a methanol injector connected in sequence, with the methanol injector located at the inlet of the three-way catalytic converter and near the electric heater.

[0009] A second aspect of this application provides a control method applied in the post-processing system described in the first aspect or any implementation thereof, comprising:

[0010] When the methanol engine is in a cold start state, the heating control strategy is determined based on the remaining charge of the power battery;

[0011] Based on the heating control strategy and the temperature detection value of the temperature sensor, the operating status of the electric heater and / or methanol supply module is controlled to ensure that the internal temperature of the three-way catalytic converter is not lower than the preset reaction temperature.

[0012] In one possible implementation, determining the heating control strategy based on the remaining charge of the power battery includes:

[0013] If the remaining power is not greater than the first power value, control the electric heater to heat to the natural temperature of methanol and then stop heating, and control the methanol supply module to inject methanol fuel.

[0014] In one possible implementation, determining the heating control strategy based on the remaining charge of the power battery further includes:

[0015] If the remaining power is not less than the second power value, only the electric heater is controlled to heat, and the second power value is greater than the first power value.

[0016] In one possible implementation, determining the heating control strategy based on the remaining charge of the power battery further includes:

[0017] If the remaining power is greater than the first power value and less than the second power value, the electric heater and the methanol supply module are controlled to work alternately. Before the methanol supply module starts working for the first time, the temperature of the electric heater after it stops heating for the first time shall not be lower than the natural temperature of the methanol.

[0018] In one possible implementation, the control method further includes: simultaneously controlling the operating state of the electric heater and / or methanol supply module based on the heating control strategy and the temperature detection value from the temperature sensor.

[0019] The range extender motor is controlled to tow the methanol engine in reverse, and the speed during the towing process is controlled according to the water temperature of the methanol engine. The range extender motor is powered by the power battery.

[0020] A third aspect of this application provides a control device, comprising:

[0021] A heating strategy determination module is used to determine a heating control strategy based on the remaining charge of the power battery when the methanol engine is in a cold start state; and,

[0022] The heating strategy execution module is used to control the working status of the electric heater and / or methanol supply module according to the heating control strategy and the temperature detection value of the temperature sensor, so as to ensure that the internal temperature of the three-way catalytic converter is not lower than the preset reaction temperature.

[0023] In one possible implementation, the process by which the heating strategy determination module determines the heating control strategy based on the remaining charge of the power battery includes:

[0024] If the remaining power is not greater than the first power value, control the electric heater to heat to the natural temperature of methanol and then stop heating, and control the methanol supply module to inject methanol fuel.

[0025] In one possible implementation, the process by which the heating strategy determination module determines the heating control strategy based on the remaining charge of the power battery includes:

[0026] If the remaining power is not less than the second power value, only the electric heater is controlled to heat, and the second power value is greater than the first power value.

[0027] In one possible implementation, the process by which the heating strategy determination module determines the heating control strategy based on the remaining charge of the power battery includes:

[0028] If the remaining power is greater than the first power value and less than the second power value, the electric heater and the methanol supply module are controlled to work alternately. Before the methanol supply module starts working for the first time, the temperature of the electric heater after it stops heating for the first time shall not be lower than the natural temperature of the methanol.

[0029] In one possible implementation, the heating strategy execution module, while controlling the operating state of the electric heater and / or methanol supply module according to the heating control strategy and the temperature detection value of the temperature sensor, is also used to:

[0030] The range extender motor is controlled to tow the methanol engine in reverse, and the speed during the towing process is controlled according to the water temperature of the methanol engine. The range extender motor is powered by the power battery.

[0031] A fourth aspect of this application provides an electronic device, including at least one processor and a memory connected to the processor, wherein:

[0032] The memory is used to store computer programs;

[0033] The processor is used to execute the computer program so that the electronic device can implement the control method of the second aspect or any implementation thereof described above.

[0034] The fifth aspect of this application provides a vehicle comprising: the after-treatment system of the first aspect and the electronic equipment described in the fourth aspect.

[0035] The sixth aspect of this application provides a computer program product including computer-readable instructions that, when executed on an electronic device, cause the electronic device to implement the control method described in the second aspect or any implementation thereof.

[0036] The seventh aspect of this application provides a computer storage medium carrying one or more computer programs, which, when executed by an electronic device, enable the electronic device to implement the control method described in the second aspect or any implementation thereof.

[0037] The aftertreatment system provided in this application, utilizing the aforementioned technical solution, includes: a methanol supply module, a temperature sensor, and an electric heater. The temperature sensor transmits the collected internal temperature of the three-way catalytic converter to the aftertreatment controller. The electric heater is located inside the three-way catalytic converter and near its inlet, powered by the vehicle's battery, and is activated or deactivated under the control of the aftertreatment controller. The methanol supply module, under the control of the aftertreatment controller, injects methanol fuel into the three-way catalytic converter. During cold starts of the methanol engine, when the internal temperature of the three-way catalytic converter is low, the electric heater and methanol supply module can be coordinated to raise the internal temperature of the three-way catalytic converter, accelerating the process of reaching a suitable operating temperature, improving conversion efficiency, and thus reducing pollutant emissions. Attached Figure Description

[0038] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0039] Figure 1 A structural diagram of a post-processing system provided in this application;

[0040] Figure 2 A flowchart of a control method provided in this application;

[0041] Figure 3 A structural diagram of a control device provided in this application;

[0042] Figure 4 This is a structural diagram of an electronic device provided in this application. Detailed Implementation

[0043] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.

[0044] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0045] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0046] Methanol engines often employ three-way catalytic converters to improve exhaust emissions. The performance of the three-way catalytic converter directly affects carbon monoxide, hydrocarbons, and nitrogen oxides in the exhaust gas, converting harmful gases into harmless carbon dioxide, water, and nitrogen through oxidation-reduction reactions. However, methanol engines experience numerous cold start phases during operation, during which the catalyst heats up slowly, resulting in a lower core temperature and reduced conversion efficiency of the three-way catalytic converter for gaseous pollutants. In range-extended hybrid vehicles, to reduce engine methanol consumption, the engine typically only starts operating when the battery's remaining charge level is below a certain limit, and frequent start-stop cycles occur.

[0047] To address the aforementioned problems, embodiments of this application provide a post-processing system. The post-processing system of this application embodiment will now be described in detail with reference to the accompanying drawings.

[0048] Reference Figure 1 , Figure 1 This application provides a schematic diagram of the structure of a post-processing system, as shown in the embodiments. Figure 1 As shown in the figure, an embodiment of this application provides an after-processing system, including: a methanol supply module 3, a temperature sensor 2, and an electric heater 1;

[0049] Temperature sensor 2 is used to send the collected internal temperature of the three-way catalytic converter to the after-treatment controller (not shown in the figure).

[0050] The electric heater 1 is located inside the three-way catalytic converter and near the inlet of the three-way catalytic converter. The electric heater 1 uses the vehicle's power battery 4 as a power source. The electric heater 1 is used to start heating or stop heating under the control of the aftertreatment controller.

[0051] The methanol supply module 3 is used to inject methanol fuel into the three-way catalytic converter under the control of the aftertreatment controller.

[0052] In the specific implementation, refer to Figure 1 As shown, the methanol supply module 3 includes a methanol tank 31, a methanol pump 32, a methanol filter 33 and a methanol injector 34 connected in sequence, wherein the methanol injector is located at the inlet of the three-way catalytic converter and close to the electric heater 1.

[0053] An electric heater 1 and a methanol injector 34 can be added to the front end of the three-way catalytic converter of a conventional methanol engine 6. Methanol fuel from the methanol tank 31 is drawn out by the methanol pump 32, filtered by the methanol filter 33, and then injected into the interior of the three-way catalytic converter through the methanol injector 34. During methanol fuel injection, the ECU (Electronic Control Unit) of the aftertreatment system controls whether or not the methanol injector 34 injects fuel.

[0054] In hybrid vehicles equipped with methanol engines (such as range-extended vehicles), when the vehicle is in a low-temperature environment or the methanol engine has been idle for an extended period, starting the methanol engine in such situations can lead to reduced exhaust gas conversion efficiency due to the low temperature of the three-way catalytic converter. In this case, the power battery 4 can supply power to the electric heater 1, raising its temperature and consequently the temperature of the three-way catalytic converter. Once the electric heater 1 reaches the natural temperature of methanol, to further accelerate the temperature rise of the three-way catalytic converter, methanol fuel can be injected into the electric heater 1 via the methanol injector 34. This combustion of methanol further accelerates the temperature rise of the three-way catalytic converter. Simultaneously, the temperature sensor 2 monitors the temperature inside the three-way catalytic converter in real time. When the temperature reaches the level corresponding to the ideal conversion efficiency, the electric heater and methanol injector can be stopped. This allows the temperature of the three-way catalytic converter to rise to the optimal conversion efficiency as quickly as possible, effectively reducing pollutant emissions from the methanol engine during cold starts and improving exhaust gas conversion efficiency during cold starts.

[0055] At the same time, while using the electric heater 1 and controlling the methanol injector 34 to heat up the three-way catalytic converter, the range extender motor 5 can also reverse-drive the methanol engine to rotate. On the one hand, this avoids dry burning, and on the other hand, by reversing the methanol engine 6, the high airflow can quickly transfer the heat from the front end of the three-way catalytic converter to the rear end and blow it into the interior of the three-way catalytic converter, further increasing the heating speed of the three-way catalytic converter.

[0056] It should be noted that the electric heater 1 mentioned above can be a high-temperature resistant heater commonly used in the field. Those skilled in the art can select and adjust it as needed, and no restrictions are imposed here.

[0057] As can be seen from the above, this aftertreatment system adds an electric heater and a methanol injector to the front end of a traditional three-way catalytic converter. Methanol fuel is drawn from the methanol tank by a methanol pump, passes through a methanol filter, and is injected by the methanol injector installed on the three-way catalytic converter under the control of the ECU. When the methanol range extender vehicle is in a low-temperature environment or the engine is idle for a long time, the three-way catalytic converter has a low temperature and low conversion efficiency. Therefore, a combination of heating measures is needed to quickly warm up the three-way catalytic converter. This rapidly improves the conversion efficiency of the three-way catalytic converter and reduces pollutant emissions from the methanol engine in a cold state.

[0058] Reference Figure 2 As shown, embodiments of this application also provide a control method that can be applied to the post-processing system described in the above embodiments, and may specifically include the following processing steps:

[0059] 201. When the methanol engine is in a cold start state, the heating control strategy is determined based on the remaining power of the power battery.

[0060] Specifically, the cold start status of a methanol engine can be determined by assessing the current ambient temperature and the duration of engine downtime. For example, if the ambient temperature is low or the engine has been idle for a long time, the engine can be considered to be in a cold start state upon startup. Of course, those skilled in the art can also combine other relevant parameters of the methanol engine to determine the cold start status, and this is not a limitation.

[0061] In practical applications, considering that continuous use of an electric heater to heat the battery when using a range-extended vehicle as a power source would cause significant wear and tear on the battery, thus affecting its power output, a heating control strategy that combines the electric heater and methanol injector can be determined based on the remaining charge of the battery.

[0062] For example, when the remaining power of the power battery is low, in order to save power of the power battery, the electric heater is heated to the auto-ignition temperature of methanol fuel by the power battery alone. After the electric heater stops heating, the methanol injector is controlled to inject a certain amount of methanol fuel onto the surface of the electric heater. The heat generated by the combustion of methanol itself is used to raise the temperature of the three-way catalytic converter carrier.

[0063] When the remaining charge of the power battery is sufficient, the power battery can be used to power the electric heater, which will then heat the three-way catalytic converter.

[0064] When the remaining charge of the power battery is between relatively high and low, in order to reduce the wear and tear on the power battery and to ensure the heating rate of the three-way catalytic converter, the electric heater and the methanol injector can be used alternately to heat the three-way catalytic converter. That is, after the electric heater works for a period of time, the methanol injector works, and then the electric heater works again, and so on, until the temperature sensor on the three-way catalytic converter detects that the internal temperature of the three-way catalytic converter is not lower than the preset ideal conversion temperature, and then heating is stopped.

[0065] 202. Based on the heating control strategy and the temperature detection value of the temperature sensor, control the working status of the electric heater and / or methanol supply module to ensure that the internal temperature of the three-way catalytic converter is not lower than the preset reaction temperature.

[0066] Specifically, guided by the aforementioned heating control strategy, the electric heater and / or methanol injector are controlled to heat the three-way catalytic converter. Simultaneously, a temperature sensor on the three-way catalytic converter detects the internal temperature. When the internal temperature reaches the required conversion efficiency, the electric heater and methanol injector are stopped. This achieves a rapid increase in the conversion efficiency of the three-way catalytic converter.

[0067] In some specific implementations, to facilitate the heating control of the three-way catalytic converter, the heating control strategy can be determined by comparing the remaining charge of the power battery with preset charge values. Therefore, when determining the heating control strategy based on the remaining charge of the power battery, it can specifically include:

[0068] If the remaining charge of the power battery is not greater than the first charge value, control the electric heater to heat to the natural temperature of methanol and then stop heating, and control the methanol supply module to inject methanol fuel.

[0069] For example, when the remaining charge of the power battery is lower than the set value S1, in order to save power, the electric heater is heated to the auto-ignition temperature of methanol fuel solely by the power battery. The ECU will control the working time of the electric heater according to the temperature rise characteristics of the electric heater. When the temperature of the electric heater reaches the auto-ignition temperature of methanol fuel, the electric heater stops working. At the same time, the ECU controls the methanol injector to inject a fixed amount of methanol fuel onto the surface of the electric heater, relying on the heat generated by the combustion of methanol itself to raise the temperature of the three-way catalytic converter carrier.

[0070] If the remaining power is not less than the second power value, only the electric heater is controlled to heat, where the second power value is greater than the first power value.

[0071] For example, when the remaining charge of the power battery exceeds the set maximum value S2, the battery is fully charged and only the electric heater is used for heating. The operation of the electric heater is controlled according to the temperature value detected by the temperature sensor.

[0072] If the remaining power is greater than the first power value but less than the second power value, the electric heater and the methanol supply module are controlled to work alternately. Before the methanol supply module starts working for the first time, the temperature of the electric heater after it stops heating for the first time shall not be lower than the natural temperature of the methanol.

[0073] For example, when S1 < remaining power < S2, the electric heater and methanol injector work alternately. The duration of alternating operation of the electric heater and methanol injector can be set according to actual needs, which will not be elaborated here.

[0074] In other embodiments, to further improve the heating rate of the three-way catalytic converter, in addition to controlling the operating status of the electric heater and / or methanol supply module based on the heating control strategy and the temperature detection value of the temperature sensor, the method further includes:

[0075] The range extender motor is controlled to tow the methanol engine in reverse, and the speed during the towing process is controlled according to the water temperature of the methanol engine. The range extender motor is powered by the power battery.

[0076] Specifically, based on the aforementioned reverse drag control, the heating process of the three-way catalytic converter can include the following steps:

[0077] When the remaining charge of the power battery is no greater than the set value S1, to conserve battery power, the electric heater is heated to the auto-ignition temperature of methanol fuel solely by the power battery. The ECU controls the operating time of the electric heater based on its temperature rise characteristics. Once the electric heater reaches the auto-ignition temperature of methanol fuel, it stops working. Simultaneously, the ECU controls the methanol injector to inject a measured amount of methanol fuel onto the surface of the electric heater. The heat generated by the combustion of methanol itself heats the three-way catalytic converter carrier. To avoid dry burning, the range extender motor drives the methanol engine in reverse. When the engine coolant temperature is low (e.g., below 60°C), to prevent the wear risk associated with high-speed reverse driving, the range extender motor drives in reverse at low speed (e.g., 1000 r / min), relying on exhaust gas to blow heat from the vicinity of the electric heater into the three-way catalytic converter, thus preheating it. When the coolant temperature is high (e.g., above 60°C), the range extender motor drives the methanol engine in reverse at high speed (e.g., 1500 r / min), relying on high airflow to quickly transfer heat from the front end of the three-way catalytic converter to the rear end.

[0078] When the remaining charge of the power battery exceeds the set maximum value S2, the battery is fully charged and only the electric heater is used for heating. If the water temperature is low at this time, the range extender motor will reverse at low speed; if the water temperature is high, the range extender motor will reverse at high speed.

[0079] When S1 < remaining power < S2, the electric heater and methanol injector work in turn, and the reverse speed of the range extender motor is controlled according to the water temperature of the methanol engine during the heating process.

[0080] The above three heating methods will all stop when the temperature measured by the temperature sensor on the three-way catalytic converter exceeds the preset value.

[0081] It is understood that those skilled in the art can adjust and select the various parameters of the methanol engine used above as needed, and no restrictions are imposed here.

[0082] The above describes a control method provided by an embodiment of this application. The following describes an apparatus for performing the above control method.

[0083] Please see Figure 3 , Figure 3 This is a schematic diagram of a control device provided in an embodiment of this application. Figure 3 As shown, the control device includes:

[0084] The heating strategy determination module 301 is used to determine a heating control strategy based on the remaining charge of the power battery when the methanol engine is in a cold start state.

[0085] The heating strategy execution module 302 is used to control the working status of the electric heater and / or methanol supply module according to the heating control strategy and the temperature detection value of the temperature sensor, so as to ensure that the internal temperature of the three-way catalytic converter is not lower than the preset reaction temperature.

[0086] In one possible implementation, the process by which the heating strategy determination module 301 determines the heating control strategy based on the remaining charge of the power battery includes:

[0087] If the remaining power is not greater than the first power value, control the electric heater to heat to the natural temperature of methanol and then stop heating, and control the methanol supply module to inject methanol fuel.

[0088] In one possible implementation, the process by which the heating strategy determination module 301 determines the heating control strategy based on the remaining charge of the power battery further includes:

[0089] If the remaining power is not less than the second power value, only the electric heater will be controlled to heat. The second power value is greater than the first power value.

[0090] In one possible implementation, the process by which the heating strategy determination module 301 determines the heating control strategy based on the remaining charge of the power battery further includes:

[0091] If the remaining power is greater than the first power value but less than the second power value, the electric heater and the methanol supply module are controlled to work alternately. Before the methanol supply module starts working for the first time, the temperature of the electric heater after it stops heating for the first time shall not be lower than the natural temperature of the methanol.

[0092] In one possible implementation, the heating strategy execution module 302 is also used to control the operating status of the electric heater and / or methanol supply module based on the heating control strategy and the temperature detection value from the temperature sensor.

[0093] The range extender motor is controlled to tow the methanol engine in reverse, and the speed during the towing process is controlled according to the water temperature of the methanol engine. The range extender motor is powered by the power battery.

[0094] This application also provides an electronic device in its embodiments. (See reference...) Figure 4 The diagram illustrates a structural schematic suitable for implementing the electronic devices in the embodiments of this application. The electronic devices in the embodiments of this application may include, but are not limited to, ECU (Electronic Control Unit), VCU (Vehicle Control Unit), MCU (Micro Controller Unit), HCU (Hybrid Control Unit), etc. Figure 4 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0095] refer to Figure 4 As shown, the electronic device includes at least one processor 401 and a memory 402 connected to the processor 401, wherein: the memory is used to store computer programs; and the processor 401 is used to execute the computer programs to enable the electronic device to implement the control method as described in the above embodiment.

[0096] This application also provides a computer program product including computer-readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the control methods provided in this application.

[0097] This application also provides a computer-readable storage medium that carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any of the control methods provided in this application.

[0098] This application also provides a vehicle, including the after-processing system and electronic devices described in the above embodiments.

[0099] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. In addition, in the device embodiment drawings provided in this application, the connection relationship between modules indicates that they have a communication connection, which can be implemented as one or more communication buses or signal lines.

[0100] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, or it can be implemented by special-purpose hardware including application-specific integrated circuits, special-purpose CPUs, special-purpose memory, special-purpose components, etc. Generally, any function performed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be diverse, such as analog circuits, digital circuits, or special-purpose circuits. However, for this application, software program implementation is more often the preferred implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, training equipment, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0101] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.

[0102] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, training device, or data center to another website, computer, training device, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

Claims

1. A post-processing system, characterized in that, include: Methanol supply module, temperature sensor and electric heater; The temperature sensor is used to send the collected internal temperature of the three-way catalytic converter to the after-processing controller; The electric heater is located inside the three-way catalytic converter and near the inlet of the three-way catalytic converter. The electric heater uses the vehicle's power battery as a power source. The electric heater is used to start heating or stop heating under the control of the aftertreatment controller. The methanol supply module is used to inject methanol fuel into the three-way catalytic converter under the control of the aftertreatment controller; The aftertreatment controller is used to: determine a heating control strategy based on the remaining charge of the power battery when the methanol engine is in a cold start state; and control the working state of the electric heater and / or methanol supply module based on the heating control strategy and the temperature detection value of the temperature sensor, so as to ensure that the internal temperature of the three-way catalytic converter is not lower than the preset reaction temperature. If the remaining power is not greater than the first power value, the electric heater is controlled to heat to the methanol auto-ignition temperature and then stop heating, and the methanol supply module is controlled to inject methanol fuel. If the remaining power is not less than the second power value, only the electric heater is controlled to heat, and the second power value is greater than the first power value; If the remaining power is greater than the first power value and less than the second power value, the electric heater and the methanol supply module are controlled to work alternately. Before the methanol supply module starts working for the first time, the temperature of the electric heater after it stops heating for the first time shall not be lower than the methanol auto-ignition temperature.

2. The post-processing system according to claim 1, characterized in that, The methanol supply module includes a methanol tank, a methanol pump, a methanol filter, and a methanol injector connected in sequence. The methanol injector is located at the inlet of the three-way catalytic converter and near the electric heater.

3. A control method, applied in the post-processing system according to claim 1 or 2, characterized in that, include: When the methanol engine is in a cold start state, the heating control strategy is determined based on the remaining charge of the power battery; Based on the heating control strategy and the temperature detection value of the temperature sensor, the working status of the electric heater and / or methanol supply module is controlled so that the internal temperature of the three-way catalytic converter is not lower than the preset reaction temperature. If the remaining power is not greater than the first power value, the electric heater is controlled to heat to the methanol auto-ignition temperature and then stop heating, and the methanol supply module is controlled to inject methanol fuel. If the remaining power is not less than the second power value, only the electric heater is controlled to heat, and the second power value is greater than the first power value; If the remaining power is greater than the first power value and less than the second power value, the electric heater and the methanol supply module are controlled to work alternately. Before the methanol supply module starts working for the first time, the temperature of the electric heater after it stops heating for the first time shall not be lower than the methanol auto-ignition temperature.

4. The control method according to claim 3, characterized in that, The method further includes: While controlling the working status of the electric heater and / or methanol supply module according to the heating control strategy and the temperature detection value of the temperature sensor, the range extender motor is controlled to reverse the methanol engine, and the speed during the reverse towing process is controlled according to the water temperature of the methanol engine. The range extender motor is powered by the power battery.

5. A control device, characterized in that, include: The heating strategy determination module is used to determine the heating control strategy based on the remaining charge of the power battery when the methanol engine is in a cold start state. as well as, The heating strategy execution module is used to control the working status of the electric heater and / or methanol supply module according to the heating control strategy and the temperature detection value of the temperature sensor, so as to ensure that the internal temperature of the three-way catalytic converter is not lower than the preset reaction temperature. If the remaining power is not greater than the first power value, the electric heater is controlled to heat to the methanol auto-ignition temperature and then stop heating, and the methanol supply module is controlled to inject methanol fuel. If the remaining power is not less than the second power value, only the electric heater is controlled to heat, and the second power value is greater than the first power value; If the remaining power is greater than the first power value and less than the second power value, the electric heater and the methanol supply module are controlled to work alternately. Before the methanol supply module starts working for the first time, the temperature of the electric heater after it stops heating for the first time shall not be lower than the methanol auto-ignition temperature.

6. An electronic device, characterized in that, It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program to enable the electronic device to implement the control method as described in any one of claims 3 to 4.

7. A vehicle, characterized in that, include: The post-processing system according to claim 1 or 2 and the electronic device according to claim 6.

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