Preheating control method for electric heating catalytic converter of extended-range fuel gas hybrid heavy truck

Abstract

The invention relates to a preheating control method for an electric heating catalyst of an extended-range fuel gas hybrid heavy truck, which comprises the following steps of: if the current extended-range fuel gas hybrid heavy truck has a preheating requirement on the electric heating catalyst, acquiring a pressure value of a vehicle-mounted gas storage tank; if the pressure value of the vehicle-mounted air storage tank is larger than the preset pressure value, the target opening value of the opening valve is calculated according to the target air flow value and the pressure value of the vehicle-mounted air storage tank, the initial opening value of the opening valve is adjusted based on the target opening value, and according to the actual air flow value of the air flow meter and the target air flow value, the pressure value of the vehicle-mounted air storage tank is adjusted. And the current opening value of the opening valve is dynamically adjusted based on a preset PID control algorithm, so that the temperature of the three-way catalyst rises to the preset temperature. And the temperature of the three-way catalyst is raised to the preset temperature. Therefore, the problems of low temperature of the three-way catalytic converter, high pollutant emission and the like during frequent high-load starting after cold starting and long-time shutdown of the engine are solved, and preheating in advance is realized through the electric heater in the non-starting state of the engine.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and particularly to a preheating control method for an electrically heated catalytic converter of an extended-range gas hybrid heavy truck. Background Art

[0002] With the increasingly strict environmental protection regulations, heavy truck manufacturers are facing great challenges in reducing vehicle exhaust emissions. Pure electric heavy trucks have limited driving ranges due to their large load capacity and high energy consumption, which easily causes range anxiety among users. In contrast, extended-range hybrid heavy trucks use on-vehicle engines for energy replenishment, which is more convenient and flexible and not limited to a specific charging pile network. In addition, the engines of extended-range heavy trucks can operate in a low fuel consumption and high efficiency working range, featuring strong working condition adaptability, low fuel consumption, and long driving range. The electric drive system of extended-range hybrid heavy trucks can quickly provide a powerful torque output, significantly improving the vehicle's power performance under conditions such as starting, accelerating, and climbing slopes, and greatly enhancing the transportation efficiency in specific complex transportation scenarios.

[0003] In recent years, due to the relatively high cost advantage of natural gas compared to diesel, heavy truck manufacturers at home and abroad have widely carried out research and development on natural gas range extenders. National VI standard natural gas engines usually adopt an emission control strategy of stoichiometric combustion combined with external cooled exhaust gas recirculation (EGR) and three-way catalytic converter (TWC). Among them, the conversion efficiency of the TWC is crucial for ensuring that the engine emissions meet the standards, and the catalyst inlet temperature is one of the key factors affecting the TWC conversion efficiency. Research shows that exhaust heat management during cold start of a gas engine is a key technology for reducing exhaust pollutants. By matching appropriate heat management technologies, the same emission control effect can be achieved with a lower amount of precious metal catalyst coated on the TWC.

[0004] However, the natural gas engine of an extended-range hybrid heavy truck does not operate throughout the whole process, but frequently performs cold starts and high-power starts after a period of shutdown according to different control strategies. Especially when the exhaust pipe temperature drops significantly, there is a problem that the tail gas temperature at the TWC inlet is difficult to meet the requirements for efficient emission conversion, which urgently needs to be solved. Summary of the Invention

[0005] The present application provides a preheating control method for an electrically heated catalytic converter of an extended-range gas hybrid heavy truck to solve the problems of low temperature of the three-way catalytic converter and high emission pollutants during cold start of the engine and frequent high-load starts after a long period of shutdown. By using an electric heater to achieve preheating in advance when the engine is not started, it ensures that the catalytic converter has reached the light-off temperature when the engine runs.

[0006] An embodiment of the first aspect of the present application provides a preheating control method for an electrically heated catalytic converter of an extended-range gas hybrid heavy truck, including the following steps:

[0007] If there is a preheating requirement for the electrically heated catalytic converter in the current extended-range gas hybrid heavy truck, obtain the pressure value of the on-vehicle air storage tank;

[0008] Judge whether the pressure value of the on-vehicle air storage tank is greater than a preset pressure value;

[0009] If the pressure value of the on-vehicle air storage tank is greater than the preset pressure value, calculate the target opening value of the opening valve according to the target air flow value and the pressure value of the on-vehicle air storage tank, adjust the initial opening value of the opening valve based on the target opening value, and obtain the actual air flow value of the air flow meter;

[0010] Based on the preset PID control algorithm, dynamically adjust the current opening value of the opening valve according to the actual air flow value and the target air flow value, so that the temperature of the three-way catalytic converter rises to the preset temperature.

[0011] According to an embodiment of the present application, after judging whether the pressure value of the on-vehicle air storage tank is greater than the preset pressure value, it further includes:

[0012] If the pressure value of the on-vehicle air storage tank is less than or equal to the preset pressure value, control the opening valve to be in a closed state, and control the extended-range generator to reverse-drive the engine based on a preset speed to perform preheated air blowing.

[0013] According to an embodiment of the present application, the preset pressure value is determined by the minimum required pressure of the pneumatic brake system of the current extended-range gas hybrid heavy truck.

[0014] According to an embodiment of the present application, the preheating control method for the electrically heated catalytic converter of the extended-range gas hybrid heavy truck further includes:

[0015] Judge whether the electric heater is in a fault state;

[0016] If the electric heater is in the fault state, generate a fault reminder message based on the fault state;

[0017] Perform acoustic reminder and / or optical reminder according to the fault reminder message.

[0018] According to the preheating control method of the electrically heated catalytic converter for an extended-range gas hybrid heavy truck provided by the embodiments of the present application, when the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value, the target opening value of the opening valve is calculated according to the target air flow value and the pressure value of the on-vehicle gas storage tank. The initial opening value of the opening valve is adjusted based on the target opening value, and according to the actual air flow value and the target air flow value of the air flow meter, the current opening value of the opening valve is dynamically adjusted based on the preset PID control algorithm, so that the temperature of the three-way catalytic converter rises to the preset temperature. Thereby, the problems of low temperature of the three-way catalytic converter and high emission pollutants during cold start of the engine and frequent high-load starts after long-term shutdown are solved. The preheating is realized in advance through the electric heater when the engine is in the unstarted state, ensuring that the catalytic converter has reached the light-off temperature when the engine is running.

[0019] The second aspect of the present application provides a preheating control device for an electrically heated catalytic converter of an extended-range gas hybrid heavy truck, including:

[0020] An acquisition module, configured to acquire the pressure value of the on-vehicle gas storage tank if there is a preheating requirement for the electrically heated catalytic converter in the current extended-range gas hybrid heavy truck;

[0021] A judgment module, configured to judge whether the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value;

[0022] An adjustment module, configured to calculate the target opening value of the opening valve according to the target air flow value and the pressure value of the on-vehicle gas storage tank if the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value, adjust the initial opening value of the opening valve based on the target opening value, and acquire the actual air flow value of the air flow meter;

[0023] A control module, configured to dynamically adjust the current opening value of the opening valve according to the actual air flow value and the target air flow value based on the preset PID control algorithm, so that the temperature of the three-way catalytic converter rises to the preset temperature.

[0024] According to an embodiment of the present application, after judging whether the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value, the judgment module is further configured to:

[0025] If the pressure value of the on-vehicle gas storage tank is less than or equal to the preset pressure value, control the opening valve to be in the closed state, and control the extended-range generator to reverse-drive the engine based on a preset speed to perform preheating air blowing.

[0026] According to an embodiment of the present application, the preset pressure value is determined by the minimum required pressure of the pneumatic brake system of the current extended-range gas hybrid heavy truck.

[0027] According to an embodiment of the present application, the preheating control device of the range-extended gas hybrid heavy truck's electric heating catalytic converter is further configured to:

[0028] Determine whether the electric heater is in a fault state;

[0029] If the electric heater is in the fault state, generate a fault reminder message based on the fault state;

[0030] Perform acoustic reminder and / or optical reminder according to the fault reminder message.

[0031] According to the preheating control device of the range-extended gas hybrid heavy truck's electric heating catalytic converter provided by the embodiment of the present application, if there is a preheating requirement for the electric heating catalytic converter in the current range-extended gas hybrid heavy truck, when the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value, calculate the target opening value of the opening valve according to the target air flow value and the pressure value of the on-vehicle gas storage tank, adjust the initial opening value of the opening valve based on the target opening value, and dynamically adjust the current opening value of the opening valve according to the actual air flow value and the target air flow value of the air flow meter based on the preset PID control algorithm, so as to raise the temperature of the three-way catalytic converter to the preset temperature. Thereby, the problems of low temperature of the three-way catalytic converter and high emission pollutants during cold start of the engine and frequent high-load starts after long-term shutdown are solved. The electric heater is used to achieve preheating in advance when the engine is not started, ensuring that the catalytic converter has reached the light-off temperature when the engine is running.

[0032] An embodiment of the third aspect of the present application provides a vehicle, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the program to implement the preheating control method of the range-extended gas hybrid heavy truck's electric heating catalytic converter as described in the above embodiment.

[0033] An embodiment of the fourth aspect of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and the computer instructions are used to cause the computer to execute the preheating control method of the range-extended gas hybrid heavy truck's electric heating catalytic converter as described in the above embodiment.

[0034] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, where:

[0036] Figure 1Schematic structural diagram of a preheating control system for an electrically heated catalytic converter of an extended - range gas - hybrid heavy truck according to an embodiment of the present application;

[0037] Figure 2 Flowchart of a preheating control method for an electrically heated catalytic converter of an extended - range gas - hybrid heavy truck provided according to an embodiment of the present application;

[0038] Figure 3 Block diagram of a preheating control device for an electrically heated catalytic converter of an extended - range gas - hybrid heavy truck according to an embodiment of the present application;

[0039] Figure 4 Schematic structural diagram of a vehicle provided according to an embodiment of the present application.

[0040] Reference numerals: 101 - on - vehicle gas storage tank, 102 - opening valve, 103 - air flow meter, 104 - electric heater, 105 - three - way catalytic converter, 106 - electric heating controller, 107 - on - vehicle battery, 108 - gas engine, 109 - range extender generator, 110 - total controller, 111 - pressure detection device; 10 - preheating control device for an electrically heated catalytic converter of an extended - range gas - hybrid heavy truck, 100 - acquisition module, 200 - judgment module, 300 - control module; 401 - memory, 402 - processor, 403 - communication interface. Detailed implementation manners

[0041] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described by referring to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0042] It can be understood that the electric heater can quickly heat the three - way catalytic converter to an appropriate light - off temperature before the cold start of the extended - range gas engine, so as to reduce the problem of tail gas pollutant emissions. However, limited by the temperature resistance of the heating wire material of the electric heater itself and considering the rapid heating effect of the heater on the catalytic converter, it is generally prohibited for the electric heater to dry - burn in a state without air flow. It is necessary to use air to blow the electric heater before the engine cold start, and the blown air heated by the electric heater exchanges heat with the three - way catalytic converter, thereby quickly increasing the temperature of the three - way catalytic converter.

[0043] In view of the above situation, it is very necessary to establish a preheating control system and method applicable to the post - treatment system of an extended - range gas - hybrid heavy truck on the vehicle.

[0044] The following describes the preheating control method for an electrically heated catalytic converter of an extended - range gas - hybrid heavy truck according to an embodiment of the present application with reference to the accompanying drawings.

[0045] Before introducing the preheating control method of the electric heating catalytic converter of the range-extended gas hybrid heavy truck according to the embodiments of the present application, the preheating control system of the electric heating catalytic converter of the range-extended gas hybrid heavy truck involved in the preheating control method of the electric heating catalytic converter of the range-extended gas hybrid heavy truck of the present application will be briefly introduced first.

[0046] Specifically, as Figure 1 shown, the preheating control system of the electric heating catalytic converter of the range-extended gas hybrid heavy truck proposed in the present application includes an on-vehicle air storage tank 101, a compressed air pipeline led out from the air storage tank, an opening valve 102, an air flow meter 103, an electric heater 104, a three-way catalytic converter 105, an electric heating controller 106, an on-vehicle battery 107, a gas engine 108, a range extender generator 109, a total controller 110, and a pressure detection device 111. Among them, the electric heater 104 is integrated at the front end of the three-way catalytic converter 105, and the electric heater 104 and the three-way catalytic converter 105 constitute an electric heating catalytic converter. In addition, the preheating control system of the present application further includes an air flow meter 103 and a jet port on the pipeline between the engine exhaust outlet and the electric heating catalytic converter.

[0047] Furthermore, the above-mentioned on-vehicle air storage tank 101 can be the on-vehicle air storage tank for pneumatic brakes originally equipped on the current heavy truck. The opening valve 102 is used to adjust the air flow. The on-vehicle battery 107 is used to supply power to the electric heater 104. The pressure detection device 111 can be a pressure sensor. The total controller 110 of the preheating system communicates with the gas engine ECU, the range extender generator ECU, the pressure detection device 111, the opening valve 102, the electric heating controller 106, the air flow meter 103, etc. to collect and control signals.

[0048] Thus, based on the on-vehicle air storage tank of the heavy truck's original pneumatic brake system, the present invention leads out an air path to meet the requirement of injecting compressed air for preheating the electric heater, reducing the cost without additionally increasing the air compression, transmission, storage, and control systems, and having good economy.

[0049] Next, the preheating control method of the electric heating catalytic converter of the range-extended gas hybrid heavy truck using the above preheating control system proposed in the present application will be introduced.

[0050] Specifically, Figure 2 is a schematic flow chart of a preheating control method of an electric heating catalytic converter of a range-extended gas hybrid heavy truck provided by an embodiment of the present application.

[0051] As Figure 2 shown, the preheating control method of the electric heating catalytic converter of the range-extended gas hybrid heavy truck includes the following steps:

[0052] In step S201, if there is a preheating requirement for the electric heating catalytic converter in the current range-extended gas hybrid heavy truck, obtain the pressure value of the on-vehicle gas storage tank.

[0053] Optionally, embodiments of the present application can determine whether there is a preheating requirement for the electric heating catalytic converter in the current range-extended gas hybrid heavy truck according to the operating state and environmental conditions of the current range-extended gas hybrid heavy truck. For example, before the engine is cold-started, or when the current range-extended gas hybrid heavy truck is about to start at high load after a long-term shutdown, it is determined that there is a preheating requirement for the electric heating catalytic converter.

[0054] Specifically, embodiments of the present application can obtain the pressure value of the on-vehicle gas storage tank through a pressure detection device, such as using a pressure sensor to obtain the pressure value of the on-vehicle gas storage tank, which is not specifically limited herein.

[0055] In step S202, determine whether the pressure value of the on-vehicle gas storage tank is greater than a preset pressure value.

[0056] Among them, in some embodiments, the preset pressure value is determined by the minimum required pressure of the pneumatic braking system of the current range-extended gas hybrid heavy truck.

[0057] In step S203, if the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value, calculate the target opening value of the opening valve according to the target air flow value and the pressure value of the on-vehicle gas storage tank, adjust the initial opening value of the opening valve based on the target opening value, and obtain the actual air flow value of the air flow meter.

[0058] Among them, the target air flow value can be an air flow value suitable for the preheating state set by those skilled in the art according to factors such as the power of the electric heating catalytic converter, the size of the three-way catalytic converter, and the required temperature rise rate. This air flow value can prompt the electric heater to quickly reach the ignition temperature of the carrier of the three-way catalytic converter at this air flow.

[0059] It can be understood that in order to quickly reach the ignition temperature of the carrier of the three-way catalytic converter in the cold start state of the engine on the whole vehicle, it is necessary to blow the target air flow when the electric heater is working to avoid dry burning damage of the electric heater caused by no air flow blowing.

[0060] Specifically, if the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value, it is necessary to calculate the target opening value of the opening valve according to the target air flow value and the pressure value of the on-vehicle gas storage tank. Those skilled in the art can establish a functional relationship between the on-vehicle gas storage tank pressure, the opening value of the opening valve, and the target air flow according to the actual situation. When the electric heater needs to be turned on, the total controller calculates the opening value of the opening valve through the target air flow and the actual pressure value of the on-vehicle gas storage tank and controls it to open the valve at this opening.

[0061] Furthermore, based on the calculated target opening value, the master controller sends a control signal to the opening valve to adjust its initial opening value to the target opening value. The target air flow rate achieved by adjusting the opening valve will be used to blow the electric heater to provide the necessary air flow, thereby preventing the electric heater from dry burning in a state without air flow and facilitating the rapid heating of the three-way catalytic converter to the appropriate light-off temperature by the electric heater.

[0062] In step S204, based on the preset PID control algorithm, the current opening value of the opening valve is dynamically adjusted according to the actual air flow rate value and the target air flow rate value, so that the temperature of the three-way catalytic converter rises to the preset temperature.

[0063] Specifically, in the embodiment of the present application, the actual flow rate value of the air flow meter can be obtained by reading the value of the air flow meter, and then based on the actual flow rate value of the air flow meter and the target air flow rate value, PID adjustment is performed based on the preset PID control algorithm to finely adjust the current opening value of the opening valve, realizing the closed-loop control of the target value of the compressed air injected into the exhaust pipe.

[0064] Thus, in the embodiment of the present application, by establishing the functional relationship between the pressure of the on-vehicle air storage tank, the opening value of the opening valve, and the target air flow rate injected into the exhaust pipe, the opening valve is quickly opened to the target opening before the engine cold start. At the same time, based on the comparison between the actual air flow rate value and the target air flow rate value of the air flow meter in the air circuit, the controller uses the PID control method to realize the closed-loop control of the opening valve, realizing the dynamic fine adjustment of the opening valve, and further realizing the precise control of the target air flow rate, ensuring the best temperature rise characteristic of the three-way catalytic converter carrier under the appropriate target air flow rate.

[0065] Furthermore, in some embodiments, after determining whether the pressure value of the on-vehicle air storage tank is greater than the preset pressure value, it further includes: if the pressure value of the on-vehicle air storage tank is less than or equal to the preset pressure value, controlling the opening valve to be in a closed state, and controlling the range extender generator to reverse-drag the engine based on the preset speed for preheating air blowing.

[0066] Optionally, the preset speed can be 600 revolutions per minute, which is not specifically limited herein.

[0067] It can be understood that the on-vehicle air storage tank is used for the pneumatic braking system. In order to ensure the pressure requirement of the brake air circuit, the embodiment of the present application sets the preset pressure value based on the pneumatic brake demand pressure, and prevents the problem that the on-vehicle air storage tank cannot meet the pressure requirement when there is a brake demand during the operation of the whole vehicle, resulting in potential safety hazards by dynamically monitoring the pressure of the on-vehicle air storage tank.

[0068] Specifically, when it is monitored that the pressure value of the on-vehicle gas storage tank decreases to a preset pressure value due to the air injected into the exhaust pipe, the master controller issues an instruction to immediately close the air passage opening valve. At the same time, the master controller issues instructions to the range extender generator and the gas engine, and the engine is reverse-driven by the range extender generator at a speed of 600 revolutions per minute to provide the electric heating preheated air flow in this way, ensuring the pressure safety of the pneumatic brake system and preventing damage caused by the dry burning of the electric heater.

[0069] Thus, the embodiment of the present application can effectively prevent the problem that the electric heater is extremely easily damaged by dry burning without the airflow blowing effect through the air injection method. The preferably appropriate compressed air flow rate ensures that the electric heater enables the three-way catalytic converter carrier to quickly reach the ignition temperature.

[0070] Further, in some embodiments, the preheating control method of the range extender gas hybrid heavy truck electric heater further includes: determining whether the electric heater is in a fault state; if the electric heater is in a fault state, generating a fault reminder message based on the fault state; and performing acoustic reminder and / or optical reminder according to the fault reminder message.

[0071] Specifically, the reminder method of the present application can be to control the acoustic reminder device of the range extender gas hybrid heavy truck to emit an alarm sound, such as a beeping sound, or voice broadcast, etc. It can also be reminded through an optical reminder device, such as flashing through the indicator light in the range extender gas hybrid heavy truck. The flashing type can be set in advance to correspond to this scenario, or displayed through the logo on the in-vehicle display screen.

[0072] In the specific execution process, when controlling the range extender gas hybrid heavy truck to perform the electric heater fault reminder, it can be reminded only through the acoustic reminder device or the optical reminder device, or can be reminded simultaneously through the acoustic reminder device and the optical reminder device, without limitation.

[0073] According to the preheating control method of the electrically heated catalytic converter of the range-extended gas hybrid heavy truck proposed by the embodiments of the present application, if there is a preheating requirement for the electrically heated catalytic converter in the current range-extended gas hybrid heavy truck, when the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value, the target opening value of the opening valve is calculated according to the target air flow value and the pressure value of the on-vehicle gas storage tank, the initial opening value of the opening valve is adjusted based on the target opening value, and according to the actual air flow value and the target air flow value of the air flow meter, the current opening value of the opening valve is dynamically adjusted based on the preset PID control algorithm, so that the temperature of the three-way catalytic converter rises to the preset temperature. Thus, the problems that the catalytic converter has a low temperature, high emission pollutants during cold start of the range-extended hybrid gas engine and frequent high-load start after long-term shutdown, and the electric heater is extremely easy to burn out without air flow blowing during the preheating process are solved. The preheating can be realized in advance by the electric heater when the vehicle engine is not started, ensuring that the catalytic converter has reached the light-off temperature when the engine runs.

[0074] Next, refer to the drawings to describe the preheating control device of the electrically heated catalytic converter of the range-extended gas hybrid heavy truck proposed by the embodiments of the present application.

[0075] Figure 3 It is a block diagram of the preheating control device of the electrically heated catalytic converter of the range-extended gas hybrid heavy truck according to the embodiments of the present application.

[0076] As Figure 3 shown, the preheating control device 10 of the electrically heated catalytic converter of the range-extended gas hybrid heavy truck includes: an acquisition module 100, a judgment module 200, an adjustment module 300, and a control module 400.

[0077] Among them, the acquisition module 100 is used to acquire the pressure value of the on-vehicle gas storage tank if there is a preheating requirement for the electrically heated catalytic converter in the current range-extended gas hybrid heavy truck; the judgment module 200 is used to judge whether the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value; the adjustment module 300 is used to calculate the target opening value of the opening valve according to the target air flow value and the pressure value of the on-vehicle gas storage tank if the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value, adjust the initial opening value of the opening valve based on the target opening value, and acquire the actual air flow value of the air flow meter; the control module 400 is used to dynamically adjust the current opening value of the opening valve based on the preset PID control algorithm according to the actual air flow value and the target air flow value, so that the temperature of the three-way catalytic converter rises to the preset temperature.

[0078] Further, in some embodiments, after judging whether the pressure value of the on-vehicle gas storage tank is greater than the preset pressure value, the judgment module 200 is further used to: if the pressure value of the on-vehicle gas storage tank is less than or equal to the preset pressure value, control the opening valve to be in the closed state, and control the range extender generator to reverse-drive the engine based on the preset speed to perform preheating air blowing.

[0079] Further, in some embodiments, the preset pressure value is determined by the minimum required pressure of the pneumatic brake system of the current range-extended gas hybrid heavy truck.

[0080] Further, in some embodiments, the preheating control device 10 of the range-extended gas hybrid heavy truck's electric heating catalytic converter is further configured to: determine whether the electric heater is in a fault state; if the electric heater is in a fault state, generate a fault reminder message based on the fault state; and perform acoustic reminder and / or optical reminder according to the fault reminder message.

[0081] It should be noted that the foregoing explanation of the embodiments of the preheating control method of the range-extended gas hybrid heavy truck's electric heating catalytic converter also applies to the preheating control device of the range-extended gas hybrid heavy truck in this embodiment, and will not be elaborated here.

[0082] According to the preheating control device of the range-extended gas hybrid heavy truck's electric heating catalytic converter provided by the embodiments of the present application, if there is a preheating requirement for the electric heating catalytic converter in the current range-extended gas hybrid heavy truck, when the pressure value of the on-vehicle air storage tank is greater than the preset pressure value, calculate the target opening value of the opening valve according to the target air flow value and the pressure value of the on-vehicle air storage tank, adjust the initial opening value of the opening valve based on the target opening value, and dynamically adjust the current opening value of the opening valve based on the actual air flow value and the target air flow value of the air flow meter according to the preset PID control algorithm, so as to raise the temperature of the three-way catalytic converter to the preset temperature. Thus, the problems of low temperature of the three-way catalytic converter and high emission pollutants during cold start of the engine and frequent high-load starts after long-term shutdown are solved. The electric heater is used to achieve preheating in advance when the engine is not started, ensuring that the catalytic converter has reached the light-off temperature when the engine is running.

[0083] Figure 4 The structure diagram of the vehicle provided by the embodiments of the present application. The vehicle may include:

[0084] A memory 401, a processor 402, and a computer program stored on the memory 401 and executable on the processor 402.

[0085] When the processor 402 executes the program, it implements the preheating control method of the range-extended gas hybrid heavy truck's electric heating catalytic converter provided in the above embodiments.

[0086] Further, the vehicle further includes:

[0087] A communication interface 403 for communication between the memory 401 and the processor 402.

[0088] The memory 401 is used to store a computer program executable on the processor 402.

[0089] The memory 401 may include high-speed RAM memory and may also include non-volatile memory, such as at least one disk memory.

[0090] If the memory 401, the processor 402, and the communication interface 403 are implemented independently, the communication interface 403, the memory 401, and the processor 402 can be interconnected via a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 only a thick line is shown in the figure, but it does not mean that there is only one bus or one type of bus.

[0091] Optionally, in a specific implementation, if the memory 401, the processor 402, and the communication interface 403 are integrated on a single chip, the memory 401, the processor 402, and the communication interface 403 can communicate with each other through an internal interface.

[0092] The processor 402 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0093] The embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the preheating control method of the extended-range gas hybrid heavy truck electric heating catalytic converter as described above is implemented.

[0094] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0095] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0096] Any process or method description shown in a flowchart or described in other ways herein can be understood to represent a module, segment, or portion of code including one or more N executable instructions for implementing a customized logical function or process, and the scope of the preferred embodiments of this application includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed, which should be understood by those skilled in the art to which the embodiments of this application pertain.

[0097] The logic and / or steps represented in the flowchart or otherwise described herein can, for example, be considered as a definable list of executable instructions for implementing logical functions, and can be embodied specifically in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection portion (electronic device) having one or N wirings, a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable medium on which the program can be printed, as the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or otherwise processing as appropriate, and then storing it in a computer memory.

[0098] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), and the like.

[0099] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by a program instructing relevant hardware, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0100] In addition, each functional unit in various embodiments of the present application may be integrated into one processing module, may exist separately as individual physical units, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0101] The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A preheating control method for an electric heating catalyst of a range-extended gas hybrid heavy truck, characterized in that: The following steps are involved: If the current extended-range gas hybrid heavy truck has a requirement for preheating the electric heating catalyst, the pressure value of the onboard gas tank is obtained; Determining whether the pressure value of the vehicle-mounted gas storage tank is greater than a preset pressure value; If the pressure value of the on-board air tank is greater than a preset pressure value, a target opening value of the opening valve is calculated according to the target air flow value and the pressure value of the on-board air tank, an initial opening value of the opening valve is adjusted based on the target opening value, and an actual air flow value of the air flow meter is obtained; According to the actual air flow value and the target air flow value, the current opening value of the opening valve is dynamically adjusted based on a preset PID control algorithm so that the temperature of the three-way catalytic converter rises to a preset temperature.

2. The method according to claim 1, characterized in that After determining whether the pressure value of the vehicle-mounted gas storage tank is greater than the preset pressure value, the method further includes: If the pressure value of the on-board air tank is less than or equal to the preset pressure value, the opening valve is controlled to be in a closed state, and the range extender generator is controlled to reverse the engine based on a preset speed to perform preheated air blowing.

3. The method according to claim 1, characterized in that The preset pressure value is determined by the minimum required pressure of the pneumatic brake system of the current extended-range gas hybrid heavy truck.

4. The method according to claim 1, characterized in that: Also includes: Determining whether the electric heater is in a fault state; If the electric heater is in the fault state, generating fault reminder information based on the fault state; An acoustic reminder and / or an optical reminder is performed according to the fault reminder information.

5. A preheating control device for an electric heating catalyst of a range-extended gas hybrid heavy truck, characterized in that: include: An acquisition module is used to obtain the pressure value of the vehicle-mounted gas storage tank if there is a need for preheating the electric heating catalyst of the current extended-range gas hybrid heavy truck; A judging module, used to judge whether the pressure value of the vehicle-mounted gas storage tank is greater than a preset pressure value; an adjusting module, configured to calculate a target opening value of the opening valve according to a target air flow value and the pressure value of the on-board air tank if the pressure value of the on-board air tank is greater than a preset pressure value, adjust an initial opening value of the opening valve based on the target opening value, and obtain an actual air flow value of an air flow meter; The control module is used to dynamically adjust the current opening value of the opening valve based on a preset PID control algorithm according to the actual air flow value and the target air flow value, so as to increase the temperature of the three-way catalytic converter to a preset temperature.

6. The device according to claim 5, characterized in that After determining whether the pressure value of the vehicle-mounted gas storage tank is greater than a preset pressure value, the determination module is further configured to: If the pressure value of the on-board air tank is less than or equal to the preset pressure value, the opening valve is controlled to be in a closed state, and the range extender generator is controlled to reverse the engine based on a preset speed to perform preheated air blowing.

7. The device according to claim 5, characterized in that The preset pressure value is determined by the minimum required pressure of the pneumatic brake system of the current extended-range gas hybrid heavy truck.

8. The device according to claim 5, characterized in that Also used for: Determining whether the electric heater is in a fault state; If the electric heater is in the fault state, generating fault reminder information based on the fault state; An acoustic reminder and / or an optical reminder is performed according to the fault reminder information.

9. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a preheating control method for an electric heating catalyst of an extended-range gas hybrid heavy truck as described in any one of claims 1 to 4.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement a preheating control method for an electric heating catalyst of an extended-range gas hybrid heavy truck as described in any one of claims 1 to 4.

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