Pressure adjusting method and device, vehicle, medium and program product

Abstract

The invention relates to the technical field of engine control, in particular to a pressure adjusting method and device, a vehicle, a medium and a program product. The method comprises the steps that in the vehicle running process, the current running working condition of an engine is determined; determining an injection pressure value required by the engine based on the current operation condition; determining a target pressure reduction pipeline from a plurality of pressure reduction pipelines based on the injection pressure value; and communicating the target pressure reducing pipeline with the electronic pressure regulating valve by adjusting a communicating valve. By means of the method, the natural gas can be stabilized within a certain pressure range after passing through the target pressure reduction pipeline, and then the problem that the temperature drop is too large due to the fact that the pressure change of the natural gas behind the electronic pressure regulating valve is too large, and then the electronic pressure regulating valve is damaged is solved.

Description

Technical Field

[0001] This application relates to the field of engine control technology, specifically to a pressure regulation method, device, vehicle, medium, and program product. Background Technology

[0002] In-cylinder natural gas direct injection combustion technology employs a high-pressure common rail electronically controlled injection system, allowing the engine to flexibly control the quality of the in-cylinder mixture by adjusting parameters such as injection pressure, injection timing, and injection pulse width. This relies on the injection mixture formation method, improving charging efficiency, reducing near-wall mixture formation, mitigating knocking in premixed natural gas combustion, and lowering hydrocarbon (HC) emissions. It allows for higher compression ratios than traditional non-direct injection natural gas engines, significantly improving the power and thermal efficiency of natural gas engines, making them excellent low-carbon emission power sources and achieving breakthroughs in carbon neutrality.

[0003] The aforementioned in-cylinder high-pressure direct injection natural gas engine supplies gas by pressurizing the natural gas in the liquefied natural gas tank and supplying it to the electronic pressure regulating valve. The electronic pressure regulating valve then reduces the pressure of the natural gas according to the vehicle load before injection. This pressure reduction process is achieved by vaporizing the liquefied natural gas. If the natural gas pressure changes too drastically, such as dropping from 580 bar to 280 bar, it can cause excessive temperature drop at the electronic pressure regulating valve, potentially leading to valve malfunction. Summary of the Invention

[0004] This application provides a pressure regulation method, device, vehicle, medium, and procedure product that can ensure that the temperature drop at the electronic pressure regulating valve will not be too large, thereby ensuring the normal operation of the electronic pressure regulating valve.

[0005] In a first aspect, embodiments of this application provide a pressure regulation method, the method comprising:

[0006] Determine the current operating condition of the engine while the vehicle is in motion;

[0007] Based on the current operating conditions, the required injection pressure value for the engine is determined. The injection pressure value is the pressure value after the natural gas is depressurized through the engine's electronic pressure regulating valve.

[0008] Based on the injection pressure value, a target pressure-reducing pipeline is determined from multiple pressure-reducing pipelines; wherein, the pressure-reducing pipeline is located between the liquefied natural gas tank of the engine and the electronic pressure regulating valve, the pressure-reducing pipeline is used to adjust the pressure value of the natural gas before the electronic pressure regulating valve, each pressure-reducing pipeline includes a pressure stabilizing tank, and the pressure stabilizing pressure value of the pressure stabilizing tanks on different pressure-reducing pipelines is different;

[0009] By adjusting the connecting valve, the target pressure-reducing pipeline is connected to the electronic pressure regulating valve.

[0010] In the above embodiments, the required injection pressure value of the engine is determined based on the current operating conditions of the natural gas engine. Then, the target pressure reduction pipeline that needs to be connected is determined based on the injection pressure value, so that the natural gas can be stabilized within a certain pressure range after passing through the target pressure reduction pipeline. This avoids the problem of excessive temperature drop caused by excessive natural gas pressure changes after the electronic pressure regulating valve, which could lead to damage to the electronic pressure regulating valve.

[0011] In one possible implementation, determining the target pressure-reducing pipeline from a plurality of pressure-reducing pipelines based on the injection pressure value includes:

[0012] Based on the preset mapping relationship between injection pressure value and pressure reduction pipeline, determine the target pressure reduction pipeline corresponding to the injection pressure value required by the engine under the current operating conditions.

[0013] In the above embodiments, by pre-establishing a mapping relationship between the injection pressure value and the pressure reduction pipeline, the target pressure reduction pipeline can be quickly determined after the injection pressure value is determined.

[0014] The step of connecting the target pressure-reducing pipeline to the electronic pressure regulating valve by adjusting the connecting valve includes:

[0015] Fault detection is performed on the target pressure reduction pipeline;

[0016] If it is determined that the target pressure-reducing pipeline is faulty, then the difference between the output pressure value of the other pressure-reducing pipelines and the output pressure value of the target pressure-reducing pipeline shall be determined respectively.

[0017] By adjusting the connecting valve, the passage between the pressure-reducing pipeline with the smallest difference and the electronic pressure regulating valve is opened, and the passage between the target pressure-reducing pipeline and the electronic pressure regulating valve is closed.

[0018] In the above embodiments, a scheme for switching pressure-reducing pipelines is provided. When the target pressure-reducing pipeline fails, a new target pressure-reducing pipeline can be selected to ensure the smooth transmission of natural gas in the pipeline.

[0019] In one possible implementation, the fault detection of the target pressure-reducing pipeline includes:

[0020] If the fault conditions are met, it is determined that the target pressure-reducing pipeline is faulty;

[0021] The fault conditions include some or all of the following:

[0022] The pressure sensor detected that the current pressure value of the pressure stabilizing tank on the target pressure reduction pipeline is less than the preset pressure value;

[0023] The flow sensor detected that the current gas flow rate in the pressure stabilizing tank on the target pressure-reducing pipeline was less than the preset gas flow rate.

[0024] The switch status indicator detects that the passage between the target pressure-reducing pipeline and the electronic pressure regulating valve is in a closed state.

[0025] In the above embodiments, multiple conditions are provided for determining whether the target pressure reduction pipeline is faulty, making the monitoring of the target pressure reduction pipeline more comprehensive and enabling timely detection of problems in the target pressure reduction pipeline.

[0026] In one possible implementation, the pressure-reducing pipeline has two lines; the connecting valve is a three-way valve;

[0027] The step of connecting the target pressure-reducing pipeline to the electronic pressure regulating valve by adjusting the connecting valve includes:

[0028] When it is determined that the engine is currently operating under high load, the target pressure reduction pipeline for the first output pressure value is connected to the electronic pressure regulating valve by adjusting the three-way valve, while the pressure reduction pipeline for the second output pressure value is not connected to the electronic pressure regulating valve.

[0029] When it is determined that the engine is currently operating under low load, the target pressure reduction pipeline for the second output pressure value is connected to the electronic pressure regulating valve by adjusting the three-way valve, while the pressure reduction pipeline for the first output pressure value is not connected to the electronic pressure regulating valve.

[0030] Wherein, the first output pressure value is greater than the second output pressure value.

[0031] In the above embodiments, two pressure-reducing pipelines are provided, which ensures low cost while avoiding excessive pressure changes before and after natural gas.

[0032] In one possible implementation, the current operating condition of the engine is determined in the following way:

[0033] If it is determined that the current torque of the engine is greater than the preset torque, then it is determined that the engine is currently operating under high load conditions.

[0034] If it is determined that the current torque of the engine is not greater than the preset torque, then it is determined that the engine is currently operating under low load conditions.

[0035] In the above embodiments, the engine operating conditions are divided into two types based on torque: high-load operating conditions and low-load operating conditions. The target pressure reduction pipeline can be further determined based on the operating conditions to ensure the normal operation of the electronic pressure regulating valve.

[0036] Secondly, embodiments of this application provide a pressure regulating device, the device comprising:

[0037] The operating condition determination module is used to determine the current operating condition of the engine during vehicle operation.

[0038] The injection pressure determination module is used to determine the injection pressure value required by the engine based on the current operating conditions. The injection pressure value is the pressure value after the natural gas is depressurized through the engine's electronic pressure regulating valve.

[0039] A pipeline determination module is used to determine a target pressure-reducing pipeline from multiple pressure-reducing pipelines based on the injection pressure value; wherein, the pressure-reducing pipeline is located between the liquefied natural gas tank of the engine and the electronic pressure regulating valve, the pressure-reducing pipeline is used to adjust the pressure value of the natural gas before the electronic pressure regulating valve, each pressure-reducing pipeline includes a pressure stabilizing tank, and the stabilizing pressure value of the pressure stabilizing tanks on different pressure-reducing pipelines is different;

[0040] The regulating module is used to connect the target pressure-reducing pipeline to the electronic pressure regulating valve by adjusting the connecting valve.

[0041] Thirdly, embodiments of this application provide an electronic device, the electronic device comprising:

[0042] At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform the method as described in the first aspect above.

[0043] Fourthly, embodiments of this application provide a vehicle that includes electronic devices as described in the third aspect above.

[0044] Fifthly, embodiments of this application provide a computer storage medium storing a computer program for causing a computer to perform the method described in the first aspect above.

[0045] In a sixth aspect, embodiments of this application provide a computer program product that, when executed by a processor, implements the method described in the first aspect above. Attached Figure Description

[0046] Figure 1This is a schematic diagram of a natural gas engine structure as an example of an exemplary embodiment of the present invention;

[0047] Figure 2 This is a schematic flowchart illustrating a voltage regulation method according to an exemplary embodiment of the present invention;

[0048] Figure 3 This is a schematic diagram illustrating a working condition differentiation example according to an exemplary embodiment of the present invention;

[0049] Figure 4 A schematic diagram of a pressure regulating device according to an exemplary embodiment of the present invention;

[0050] Figure 5 A schematic diagram of an electronic device according to an exemplary embodiment of the present invention;

[0051] Figure 6 This is a schematic diagram of a vehicle as an example of an exemplary embodiment of the present invention. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown here.

[0053] The acquisition, storage, use, and processing of data in this application embodiment all comply with the relevant provisions of national laws and regulations.

[0054] First, some of the concepts involved in the embodiments of this application will be introduced.

[0055] Natural gas engine: An engine that uses natural gas as fuel, also known as a spark-ignition engine. In a natural gas engine, the natural gas is ignited by diesel fuel.

[0056] The structure of the natural gas engine provided in this application embodiment can be as follows: Figure 1As shown in the diagram, this structure has two pipelines: a diesel pipeline and a natural gas pipeline. The diesel pipeline includes a diesel tank, a diesel pump, a pressure regulating valve, a diesel rail, and diesel nozzles; the natural gas pipeline includes a liquefied natural gas tank, a high-pressure liquefied natural gas pump, an evaporator, two three-way valves, multiple pressure regulating tanks, an electronic pressure regulating valve, a gas rail, and gas nozzles. The pressure of the natural gas output from the pressure regulating tanks can drive the evaporator.

[0057] Pressure reduction pipeline: In Figure 1 In this embodiment, pressure-reducing pipeline 1 consists of three-way valve 1 – pressure stabilizing tank 1 – three-way valve 2, and pressure-reducing pipeline 2 consists of three-way valve 1 – pressure stabilizing tank 2 – three-way valve 2. In this embodiment, more pressure-reducing pipelines can be provided, with multiple pressure stabilizing tanks connected to each pipeline. This embodiment provides two pressure-reducing pipelines, each with one pressure stabilizing tank, which saves costs while solving technical problems. The specific number of pressure-reducing pipelines and pressure stabilizing tanks is not limited here.

[0058] Pressure stabilizing tank: Used to maintain the pressure of natural gas at a stabilizing pressure value. For example, if the pressure stabilizing tank has a pressure of 500 bar, the pressure of the natural gas output from the tank will also be 500 bar. It should be noted that "bar" is a unit of pressure, and pressure can be further converted into pressure to describe the pressure stabilizing performance of the pressure stabilizing tank.

[0059] Regulated pressure value: This indicates the pressure value after the natural gas is output from the pressure stabilizing tank.

[0060] Injection pressure: The pressure value after the natural gas has been depressurized via the engine's electronic pressure regulating valve. Figure 1 In this context, the injection pressure value is the pressure of the natural gas located downstream of the electronic pressure regulating valve.

[0061] Output pressure value: This indicates the pressure value of natural gas after it is output from the pressure-reducing pipeline, that is, the pressure value after passing through the last pressure-stabilizing tank in the pressure-reducing pipeline.

[0062] Pressure sensor: Used to detect the gas pressure in the pressure vessel.

[0063] Flow sensor: Used to detect the gas flow rate in the pressure vessel.

[0064] Torque sensor: Used to collect engine torque.

[0065] The pressure regulation method in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0066] To address the problem of damage caused by excessive pressure drop at electronic pressure regulating valves in existing technologies, this application provides a pressure regulation method, such as... Figure 2 As shown, the method includes:

[0067] S201: Determine the current operating condition of the engine while the vehicle is in motion.

[0068] In the embodiments of this application, the engine operating conditions can be divided into high-load conditions and low-load conditions based on the magnitude of torque.

[0069] If it is determined that the current torque of the engine is greater than a preset torque, then the engine is determined to be operating under high load; if it is determined that the current torque of the engine is not greater than the preset torque, then the engine is determined to be operating under low load. The preset torque is pre-calibrated, and this application embodiment does not specifically limit the magnitude of the preset torque.

[0070] Furthermore, the embodiments of this application may include only two operating conditions, or the engine operating conditions may be further divided into multiple operating conditions based on the torque magnitude. Here, no specific limitation is made on the category of operating conditions.

[0071] S202: Based on the current operating conditions, determine the required injection pressure value for the engine.

[0072] like Figure 3 As shown, the operating conditions can be operating condition 1, operating condition 2, operating condition 3, operating condition 4, operating condition 5 and operating condition 6. Among them, operating condition 1, operating condition 2 and operating condition 6 are high load operating conditions, while operating condition 3, operating condition 4 and operating condition 5 are low load operating conditions.

[0073] The injection pressure value refers to the pressure after the natural gas has been depressurized by the engine's electronic pressure regulating valve. Different operating conditions correspond to different injection pressure values. During implementation, a mapping relationship between operating conditions and injection pressure values ​​can be pre-established. For example, the injection pressure value corresponding to a high-load operating condition is P1, and the injection pressure value corresponding to a low-load operating condition is P2. Once it is determined that the current operating condition is a low-load operating condition, the required injection pressure value P2 for the engine can be determined based on the aforementioned mapping relationship between operating conditions and injection pressure values.

[0074] S203: Based on the injection pressure value, determine the target pressure reduction pipeline from multiple pressure reduction pipelines.

[0075] by Figure 1For example, based on the characteristics of a natural gas engine, the pressure of natural gas before the three-way valve 1 is relatively high. Under different operating conditions, the injection pressure after the electronic pressure regulating valve varies. If the pressure before and after the electronic pressure regulating valve differs significantly, excessive temperature drop at the electronic pressure regulating valve will occur, potentially leading to valve malfunction. To avoid this, a target pressure-reducing pipeline needs to be determined based on the injection pressure. After passing through the target pipeline, the natural gas pressure will decrease, reducing the difference between the pressure before and after the electronic pressure regulating valve, thus resolving the problem of excessive temperature drop at the valve. This pressure-reducing pipeline is located between the engine's liquefied natural gas tank and the electronic pressure regulating valve. It is used to adjust the pressure of the natural gas before the valve. Each pipeline includes a pressure stabilizing tank, and the stabilizing pressure of the tanks on different pipelines varies.

[0076] In one possible implementation, the target pressure-reducing pipeline can be selected specifically through the following methods:

[0077] Based on the preset mapping relationship between injection pressure values ​​and pressure reduction pipelines, the target pressure reduction pipeline corresponding to the injection pressure value required by the engine under the current operating conditions is determined.

[0078] by Figure 1 Taking the two pressure-reducing pipelines shown as an example, the injection pressure value P1 corresponds to the pressure-reducing pipeline where the pressure stabilizing tank 1 is located, and the injection pressure value P2 corresponds to the pressure-reducing pipeline where the pressure stabilizing tank 2 is located. When the injection pressure value is determined to be P1, the target pressure-reducing pipeline is the pressure-reducing pipeline where the pressure stabilizing tank 1 is located.

[0079] S204: Connect the target pressure-reducing pipeline to the electronic pressure regulating valve by adjusting the connecting valve.

[0080] In this embodiment, the connecting valve can be a three-way valve or other types; it can be installed only at the beginning of the pressure-reducing pipeline, or it can be installed at both the beginning and end of the pressure-reducing pipeline. The type and location of the connecting valve are not specifically limited here. Figure 1 As shown, the pressure-reducing pipeline may include two lines, each containing one pressure-stabilizing tank. Pressure-stabilizing tank 1 has a pressure of 500 bar, and pressure-stabilizing tank 2 has a pressure of 300 bar. Three-way valves are installed at the beginning and end of the pressure-reducing pipeline, respectively, before and after the pressure-stabilizing tanks. The pressure of the pressure-stabilizing tanks is pre-calibrated based on the characteristics of the natural gas engine; this embodiment does not impose specific limitations on it.

[0081] by Figure 1 For example, by adjusting the three-way valve, the target pressure-reducing pipeline can be connected to the electronic pressure regulating valve, including any of the following:

[0082] (1) When it is determined that the engine is currently operating under high load, the target pressure reduction pipeline of the first output pressure value is connected to the electronic pressure regulating valve by adjusting the three-way valve, and the pressure reduction pipeline of the second output pressure value is not connected to the electronic pressure regulating valve.

[0083] For example, when it is determined that the engine is currently operating under high load, the pressure reduction pipeline of the 500bar pressure stabilizing tank is connected to the electronic pressure regulating valve by adjusting the three-way valve, while the pressure reduction pipeline of the 300bar pressure stabilizing tank is not connected to the electronic pressure regulating valve.

[0084] (2) When it is determined that the engine is currently operating under low load, the target pressure reduction pipeline of the second output pressure value is connected to the electronic pressure regulating valve by adjusting the three-way valve, and the pressure reduction pipeline of the first output pressure value is not connected to the electronic pressure regulating valve.

[0085] For example, when it is determined that the engine is currently operating under low load, the pressure reduction line of the 300bar pressure stabilizing tank is connected to the electronic pressure regulating valve by adjusting the three-way valve, while the pressure reduction line of the 500bar pressure stabilizing tank is not connected to the electronic pressure regulating valve.

[0086] In one possible implementation, fault detection is performed on each pressure-reducing pipeline in real time. If a fault is detected in the target pressure-reducing pipeline after it has been identified, regardless of whether the current target pressure-reducing pipeline is connected, it is necessary to switch to another pressure-reducing pipeline through a connecting valve. The selection of another pressure-reducing pipeline can be achieved through the following implementation methods.

[0087] Determine the difference between the output pressure value of the remaining pressure-reducing pipelines and the output pressure value of the target pressure-reducing pipeline; by adjusting the connecting valve, open the passage between the pressure-reducing pipeline with the smallest difference and the electronic pressure regulating valve, and close the passage between the target pressure-reducing pipeline and the electronic pressure regulating valve.

[0088] For example, the output pressure values ​​of the five pressure-reducing lines are P3, P4, P5, P6, and P7, respectively. The output pressure value of the target pressure-reducing line is P3, which has the smallest difference from P4. When it is determined that the target pressure-reducing line has failed, the pressure-reducing line with the output pressure value of P4 is selected as the new target pressure-reducing line and connected through the connecting valve.

[0089] If it only includes two pressure-reducing lines, such as Figure 1 As shown, when a fault is detected in the pressure-reducing pipeline where pressure stabilizing tank 1 is located, the pressure-reducing pipeline where pressure stabilizing tank 2 is located is used; when a fault is detected in the pressure-reducing pipeline where pressure stabilizing tank 2 is located, the pressure-reducing pipeline where pressure stabilizing tank 1 is used is used.

[0090] In one possible implementation, fault detection of the target step-down pipeline may include some or all of the following.

[0091] (1) When the pressure sensor detects that the current pressure value of the pressure stabilizing tank on the target pressure reduction pipeline is less than the preset pressure value, it is determined that the target pressure reduction pipeline has a fault.

[0092] For example, for a 500-bar pressure stabilizing tank, a pressure sensor is installed inside the tank to monitor the pressure value in real time. If the detected current pressure value is less than 500 bar, it is determined that the target pressure reduction pipeline has a fault. Due to the error in pressure sensor detection, the preset pressure value can be slightly lower than 500 bar, for example, 495 bar. That is, if the detected current pressure in the pressure stabilizing tank is between 495 bar and 500 bar, it can be determined that the pressure stabilizing tank is normal, and therefore the target pressure reduction pipeline is normal.

[0093] (2) When the flow sensor detects that the current gas flow rate in the pressure stabilizing tank on the target pressure reduction pipeline is less than the preset gas flow rate, it is determined that the target pressure reduction pipeline has a fault.

[0094] The working principle of a pressure stabilizer is to buffer, reduce, or eliminate fluctuating airflow upon entering the housing, ensuring stable overall pressure during engine operation and preventing accidents. However, different pressure stabilizers have varying buffering effects on airflow, meaning that the gas flow rate varies within different pressure stabilizers.

[0095] For example, for a 500 bar pressure stabilizing tank, a flow sensor is installed inside the tank to monitor the gas flow rate. If the current gas flow rate is less than Q1, it indicates that the buffering effect on the airflow is reduced, and it is determined that the target pressure reduction pipeline has failed.

[0096] (3) When the switch status indicator detects that the passage between the target pressure reducing pipeline and the electronic pressure regulating valve is in a closed state, it is determined that the target pressure reducing pipeline has a fault.

[0097] Besides the aforementioned pressure stabilizing tank malfunction indicating a target pressure-reducing pipeline fault, "failure to connect the target pressure-reducing pipeline" can also indicate a target pressure-reducing pipeline fault. Specifically, the switch status indicator can be connected to the connecting valve. When the electronic control unit sends a "open target pressure-reducing pipeline" command to the connecting valve, the switch status indicator will normally provide a signal indicating an "open" state. If opening fails, the switch status indicator will provide a signal indicating a "closed" state to the electronic control unit. In this case, the electronic control unit can determine that the target pressure-reducing pipeline is faulty.

[0098] like Figure 1The pressure-reducing pipeline shown includes two three-way valves. It is necessary to receive signals indicating "open" from both switch status indicators simultaneously to determine that the target pressure-reducing pipeline is normal. If a signal indicating "closed" is received from either switch status indicator, the target pressure-reducing pipeline is determined to be faulty.

[0099] In addition, it is possible to determine whether the pressure regulator is faulty by checking whether the valves (such as the vent valve) on the pressure regulator are faulty, and thus determine whether the target pressure reduction pipeline is faulty.

[0100] In one possible implementation, after determining that the target step-down pipeline is faulty, in addition to reselecting the target step-down pipeline, an alarm message can be generated to prompt the driver to repair the step-down pipeline. The alarm message can be displayed on the vehicle's smart cockpit display, can be delivered via voice announcement, or can be communicated to the driver by illuminating an indicator light; however, this embodiment does not specifically limit the specific methods used.

[0101] This application provides a pressure regulation method that can determine the target pressure reduction pipeline to be connected based on the current operating conditions of the natural gas engine. This allows the pressure stabilizing tank on the target pressure reduction pipeline to stabilize the pressure of the natural gas in the pipeline within a certain range, thereby avoiding excessive pressure fluctuations after the electronic pressure regulating valve and preventing damage to the electronic pressure regulating valve. Furthermore, if the target pressure reduction pipeline malfunctions, it can promptly switch to other pressure reduction pipelines to ensure smooth natural gas transmission and issue an alarm to remind the driver to perform timely vehicle maintenance.

[0102] Based on the same inventive concept, embodiments of this application also provide a pressure regulating device, such as... Figure 4 As shown, the device includes:

[0103] The operating condition determination module 401 is used to determine the current operating condition of the engine during vehicle operation.

[0104] The injection pressure determination module 402 is used to determine the injection pressure value required by the engine based on the current operating conditions. The injection pressure value is the pressure value after the natural gas is depressurized by the electronic pressure regulating valve of the engine.

[0105] The pipeline determination module 403 is used to determine a target pressure reduction pipeline from multiple pressure reduction pipelines based on the injection pressure value; wherein, the pressure reduction pipeline is located between the liquefied natural gas tank of the engine and the electronic pressure regulating valve, the pressure reduction pipeline is used to adjust the pressure value of the natural gas before the electronic pressure regulating valve, each pressure reduction pipeline includes a pressure stabilizing tank, and the stabilizing pressure value of the pressure stabilizing tank on different pressure reduction pipelines is different;

[0106] The adjustment module 404 is used to connect the target pressure-reducing pipeline to the electronic pressure regulating valve by adjusting the connecting valve.

[0107] In one possible implementation, the piping module 403 is designated for:

[0108] Based on the preset mapping relationship between injection pressure values ​​and pressure reduction pipelines, the target pressure reduction pipeline corresponding to the injection pressure value required by the engine under the current operating conditions is determined.

[0109] In one possible implementation, the adjustment module 403 is used for:

[0110] Fault detection is performed on the target pressure reduction pipeline;

[0111] If it is determined that the target pressure-reducing pipeline is faulty, then the difference between the output pressure value of the other pressure-reducing pipelines and the output pressure value of the target pressure-reducing pipeline shall be determined respectively.

[0112] By adjusting the connecting valve, the passage between the pressure-reducing pipeline with the smallest difference and the electronic pressure regulating valve is opened, and the passage between the target pressure-reducing pipeline and the electronic pressure regulating valve is closed.

[0113] In one possible implementation, the adjustment module 403 is used for:

[0114] If the pressure sensor detects that the current pressure value of the pressure stabilizing tank on the target pressure-reducing pipeline is less than the preset pressure value, or the flow sensor detects that the current gas flow rate in the pressure stabilizing tank on the target pressure-reducing pipeline is less than the preset gas flow rate, or the switch status indicator detects that the passage between the target pressure-reducing pipeline and the electronic pressure regulating valve is closed, it is determined that there is a fault in the target pressure-reducing pipeline.

[0115] In one possible implementation, the pressure-reducing pipeline has two lines; the connecting valve is a three-way valve;

[0116] The adjustment module 403 is used for:

[0117] When it is determined that the engine is currently operating under high load, the target pressure reduction pipeline for the first output pressure value is connected to the electronic pressure regulating valve by adjusting the three-way valve, while the pressure reduction pipeline for the second output pressure value is not connected to the electronic pressure regulating valve.

[0118] When it is determined that the engine is currently operating under low load, the target pressure reduction pipeline for the second output pressure value is connected to the electronic pressure regulating valve by adjusting the three-way valve, while the pressure reduction pipeline for the first output pressure value is not connected to the electronic pressure regulating valve.

[0119] Wherein, the first output pressure value is greater than the second output pressure value.

[0120] In one possible implementation, the operating condition determination module 401 is used to determine the current operating condition of the engine in the following ways:

[0121] If it is determined that the current torque of the engine is greater than the preset torque, then it is determined that the engine is currently operating under high load conditions.

[0122] If it is determined that the current torque of the engine is not greater than the preset torque, then it is determined that the engine is currently operating under low load conditions.

[0123] Based on the same inventive concept, embodiments of this application also provide an electronic device, such as... Figure 5 As shown, the electronic device includes:

[0124] The system includes a processor 501, a memory 502, and a communication interface 503; and a bus 504. The processor 501, memory 502, and communication interface 503 are interconnected via the bus 504.

[0125] The processor 501 is used to read and execute instructions from the memory 502, so that the at least one processor can execute a pressure regulation method provided in the above embodiments.

[0126] The memory 502 is used to store various instructions and programs for the pressure regulation method provided in the above embodiments.

[0127] The communication interface 503 is used for data interaction between various sensors, switch status indicators and other external devices and the electronic control unit.

[0128] Bus 504 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be divided into address buses, data buses, control buses, etc. For ease of representation, Figure 5 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0129] Processor 501 can be a central processing unit (CPU), a network processor (NP), a graphics processing unit (GPU), or any combination of CPU, NP, and GPU. It can also be a hardware chip. The aforementioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The aforementioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0130] Memory 502 may include readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory, and may further include read-only memory (ROM). Memory 502 may also include programs / utilities having a set (at least one) of program modules, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0131] Based on the same inventive concept, this application also provides a vehicle, such as... Figure 6 As shown, the vehicle includes:

[0132] Electronic control unit, such as Figure 5 The electronic device shown determines the current operating condition of the engine, the values ​​of each sensor, and the status of the switch status indicator during vehicle operation, and executes a pressure regulation method provided in this application embodiment based on the collected data.

[0133] A torque sensor is used to collect the engine's torque and feed it back to the electronic control unit.

[0134] Pressure sensors are used to collect the pressure values ​​of the pressure stabilizing tanks on each pressure-reducing pipeline and feed them back to the electronic control unit;

[0135] Flow sensors are used to collect the gas flow rate values ​​of the pressure stabilizing tanks on each pressure-reducing pipeline and feed them back to the electronic control unit;

[0136] A switch status indicator, connected to the connecting valve, is used to indicate the switch status of the connecting valve and to feed back the switch status to the electronic control unit.

[0137] This application also provides a computer program product, including a computer program that, when executed by a processor, implements any of the pressure regulation methods described above. For example, the methods in this application can be implemented wholly or partially through software, hardware, firmware, or any combination thereof. When implemented in software, they can be implemented wholly or partially as a computer program product. A computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, all or part of the processes or functions of this application are performed. The computer can be a general-purpose computer, a special-purpose computer, a computer network, network equipment, user equipment, core network equipment, or other programmable devices.

[0138] Optionally, a computer-readable storage medium can be used as an implementation of the above-described computer program product. That is, the embodiments of this application also provide a computer-readable storage medium, which includes a computer program that, when executed by a processor, implements any of the pressure regulation methods described above.

[0139] For example, computer programs or instructions can be stored in or transferred from one computer-readable storage medium to another. For instance, a computer program or instructions can be transferred from one website, computer, server, or data center to another via wired or wireless means. A computer-readable storage medium can be any usable medium that a computer can access, or a data storage device such as a server or data center that integrates one or more usable media. The usable medium can be magnetic media, such as floppy disks, hard disks, and magnetic tapes; it can also be optical media, such as digital video discs; or it can be semiconductor media, such as solid-state drives. The computer-readable storage medium can be volatile or non-volatile, or it can include both types of storage media.

[0140] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0141] These computer programs may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0142] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0143] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0144] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A pressure regulation method, characterized in that, The method includes: Determine the current operating condition of the engine while the vehicle is in motion; Based on the current operating conditions, the required injection pressure value for the engine is determined. The injection pressure value is the pressure value after the natural gas is depressurized through the engine's electronic pressure regulating valve. Based on the injection pressure value, a target pressure-reducing pipeline is determined from multiple pressure-reducing pipelines; wherein, the pressure-reducing pipeline is located between the liquefied natural gas tank of the engine and the electronic pressure regulating valve, the pressure-reducing pipeline is used to adjust the pressure value of the natural gas before the electronic pressure regulating valve, each pressure-reducing pipeline includes a pressure stabilizing tank, and the pressure stabilizing pressure value of the pressure stabilizing tanks on different pressure-reducing pipelines is different; By adjusting the connecting valve, the target pressure-reducing pipeline is connected to the electronic pressure regulating valve.

2. The method according to claim 1, characterized in that, The step of determining the target pressure-reducing pipeline from multiple pressure-reducing pipelines based on the injection pressure value includes: Based on the preset mapping relationship between injection pressure value and pressure reduction pipeline, determine the target pressure reduction pipeline corresponding to the injection pressure value required by the engine under the current operating conditions.

3. The method according to claim 1, characterized in that, The step of connecting the target pressure-reducing pipeline to the electronic pressure regulating valve by adjusting the connecting valve includes: Fault detection is performed on the target pressure reduction pipeline; If it is determined that the target pressure-reducing pipeline is faulty, then the difference between the output pressure value of the other pressure-reducing pipelines and the output pressure value of the target pressure-reducing pipeline shall be determined respectively. By adjusting the connecting valve, the passage between the pressure-reducing pipeline with the smallest difference and the electronic pressure regulating valve is opened, and the passage between the target pressure-reducing pipeline and the electronic pressure regulating valve is closed.

4. The method according to claim 3, characterized in that, The fault detection of the target pressure-reducing pipeline includes: If the fault conditions are met, it is determined that the target pressure-reducing pipeline is faulty; The fault conditions include some or all of the following: The pressure sensor detected that the current pressure value of the pressure stabilizing tank on the target pressure reduction pipeline is less than the preset pressure value; The flow sensor detected that the current gas flow rate in the pressure stabilizing tank on the target pressure-reducing pipeline was less than the preset gas flow rate. The switch status indicator detects that the passage between the target pressure-reducing pipeline and the electronic pressure regulating valve is in a closed state.

5. The method according to claim 1, characterized in that, The pressure-reducing pipeline has two lines; the connecting valve is a three-way valve. The step of connecting the target pressure-reducing pipeline to the electronic pressure regulating valve by adjusting the connecting valve includes: When it is determined that the engine is currently operating under high load, the target pressure reduction pipeline for the first output pressure value is connected to the electronic pressure regulating valve by adjusting the three-way valve, while the pressure reduction pipeline for the second output pressure value is not connected to the electronic pressure regulating valve. When it is determined that the engine is currently operating under low load, the target pressure reduction pipeline for the second output pressure value is connected to the electronic pressure regulating valve by adjusting the three-way valve, while the pressure reduction pipeline for the first output pressure value is not connected to the electronic pressure regulating valve. Wherein, the first output pressure value is greater than the second output pressure value.

6. The method according to claim 5, characterized in that, Determine the current operating condition of the engine using the following methods: If it is determined that the current torque of the engine is greater than the preset torque, then it is determined that the engine is currently operating under high load conditions. If it is determined that the current torque of the engine is not greater than the preset torque, then it is determined that the engine is currently operating under low load conditions.

7. An electronic device, characterized in that, The electronic device includes: At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform any one of the methods claimed in claims 1-6.

8. A vehicle, characterized in that, The vehicle includes the electronic equipment as described in claim 7.

9. A computer storage medium, characterized in that, The computer storage medium stores a computer program that causes the computer to perform any one of the methods claimed in claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements any one of the methods as claimed in claims 1-6.

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