Air path anti-icing method of vehicle, vehicle control unit, vehicle and medium

Abstract

The invention provides a gas path anti-icing method of a vehicle, a vehicle control unit, the vehicle and a medium, and relates to the technical field of vehicle control. The method comprises the steps that after high pressure on a vehicle is detected, the environment temperature of the vehicle is obtained; the first switching valve and the second switching valve are controlled according to the environment temperature so as to switch gas supply pipelines, the gas supply pipelines comprise the first gas supply pipeline and the second gas supply pipeline, the first gas supply pipeline comprises a first pipeline, and the second gas supply pipeline comprises a second pipeline. According to the method, the air supply pipeline of the vehicle can be effectively prevented from being frozen, it is guaranteed that an air path is smooth in the low-temperature environment, and therefore normal control over the vehicle is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a vehicle air path anti-icing method, a vehicle controller, a vehicle and a medium. Background Art

[0002] At present, more and more vehicles use air pressure as a power source, such as heavy trucks and engineering vehicles that use air pressure brakes, or passenger cars with air bags. Take heavy trucks as an example. Heavy trucks use high-pressure gas as a power source to brake the vehicle. The air is compressed by the air pump, and the pressurized air reaches the brake air chamber through the pipeline and valve body. The brake air chamber push rod extends and pushes the brake adjustment arm to brake.

[0003] In the related technology, since the air contains a certain amount of moisture, the gas in the air first passes through the air filter to filter the liquid water in the gas, and then enters the air compressor for pressurization. The pressurized gas has high pressure and temperature. The high-pressure gas is cooled by a 4-6m long steel pipe, and then dried and filtered by the air processing unit (APU). Finally, the clean, low-temperature high-pressure gas enters the air storage cylinder for vehicle braking. In addition, electric heavy trucks use electric air compressors, which generally have a small exhaust volume, so the inflation time is longer and the APU drying time is longer. In order to relieve the APU pressure, a condenser is often added in front of the APU. The condenser can precipitate liquid water and cool the high-pressure gas.

[0004] However, when the ambient temperature is low, the air supply pipeline of air compressor-steel pipe-condenser-APU-air tank is prone to ice, resulting in obstruction of the air path and affecting the normal control of the vehicle. Summary of the invention

[0005] The embodiments of the present application provide a vehicle's air circuit anti-icing method, a vehicle controller, a vehicle and a medium, which can effectively prevent the vehicle's air supply pipeline from freezing, ensure the smooth flow of the air circuit in a low-temperature environment, and thus ensure normal control of the vehicle.

[0006] In a first aspect, an embodiment of the present application provides a method for preventing air circuit icing of a vehicle, wherein the vehicle comprises an air compressor, a condenser, an air processing unit APU, and an air storage cylinder, wherein the air compressor is respectively connected to a first pipeline and a second pipeline through a first switching valve, the condenser is respectively connected to the first pipeline and the second pipeline through a second switching valve, and the condenser is connected to the air storage cylinder through the APU, and the method comprises:

[0007] After detecting high voltage on the vehicle, obtain the ambient temperature of the vehicle;

[0008] The first switching valve and the second switching valve are controlled respectively according to the ambient temperature to switch the gas supply pipeline, the gas supply pipeline includes a first gas supply pipeline and a second gas supply pipeline, the first gas supply pipeline includes the first pipe, the second gas supply pipeline includes the second pipe, and the length of the first pipe is greater than the length of the second pipe.

[0009] In a possible implementation manner, the controlling the first switching valve and the second switching valve respectively according to the ambient temperature to switch the gas supply pipeline includes any one of the following:

[0010] When the ambient temperature exceeds a preset temperature threshold, the first switching valve and the second switching valve are controlled respectively to execute a first air supply pipeline, wherein the first air supply pipeline sequentially includes an air compressor, a first switching valve, a first pipeline, a second switching valve, a condenser, an APU and an air storage cylinder;

[0011] When the ambient temperature does not exceed the preset temperature threshold, the first switching valve and the second switching valve are controlled respectively to execute the second air supply pipeline, which sequentially includes an air compressor, a first switching valve, a second pipeline, a second switching valve, a condenser, an APU and an air tank.

[0012] In a possible implementation, it further includes:

[0013] After detecting that the vehicle is shut down, when the ambient temperature does not exceed the preset temperature threshold, after detecting that the shutdown duration exceeds the preset duration threshold, the exhaust port of the condenser / APU is controlled to open for a first time period to release the gas in the first pipe / second pipe.

[0014] In a possible implementation manner, after obtaining the ambient temperature of the vehicle, the method further includes:

[0015] When the ambient temperature does not exceed a preset temperature threshold, a de-icing operation is performed: the air compressor is controlled to perform an air pumping operation, and the exhaust port of the condenser / APU is controlled to be open for a second time period.

[0016] In a possible implementation manner, the vehicle further includes an air pressure sensor, the air pressure sensor is connected to the air reservoir, and after obtaining the ambient temperature of the vehicle, the following steps are further included:

[0017] Step S1: during the driving process of the vehicle, when it is detected that the ambient temperature does not exceed the preset temperature threshold and the vehicle is operating without gas, the current air pressure value of the air tank is obtained by using the air pressure sensor;

[0018] Step S2: controlling the air compressor to perform an inflating operation, determining the inflating time of this inflating operation, and the target air pressure value of the air storage cylinder after the inflating operation;

[0019] Step S3: determining the air volume of this inflation operation according to the current air pressure value, the target air pressure value and the volume of the air reservoir;

[0020] Step S4: determining the inflation efficiency of the current inflation operation according to the inflation volume and the inflation time, and determining whether the air supply pipeline is blocked according to the inflation efficiency.

[0021] In a possible implementation manner, determining whether the air supply pipeline is blocked according to the pumping efficiency includes:

[0022] Determining whether the inflation efficiency is less than a preset efficiency threshold;

[0023] If it is less than the efficiency threshold, it is determined that the air supply pipeline is blocked, and when the air compressor is detected to be idle, a preset number of de-icing operations are performed: the air compressor is controlled to perform an air pumping operation, and the exhaust port of the condenser / APU is controlled to be open for a second time period;

[0024] If it is not less than the efficiency threshold, it is determined that there is no blockage in the air supply pipeline.

[0025] In a possible implementation manner, after performing the de-icing operation for a preset number of times, the method further includes:

[0026] Re-execute the above steps S1-S3 to obtain the air pumping efficiency after deicing;

[0027] Determining whether the inflation efficiency after deicing is less than a preset efficiency threshold;

[0028] If it is still less than the efficiency threshold, the gas supply pipeline blockage risk warning information will be output through the instrument panel.

[0029] In a second aspect, an embodiment of the present application provides a vehicle controller, including:

[0030] A processor, and a memory communicatively connected to the processor;

[0031] Memory is used to store computer executable instructions;

[0032] The processor is used to execute the computer-executable instructions stored in the memory, so that the processor executes the above-mentioned first aspect and / or various possible implementations of the first aspect.

[0033] In a third aspect, an embodiment of the present application provides a vehicle, comprising: an air compressor, a condenser, an air processing unit APU, an air storage cylinder, and a vehicle controller as described in the second aspect;

[0034] The air compressor is connected to the first pipeline and the second pipeline respectively through the first switching valve, the condenser is connected to the first pipeline and the second pipeline respectively through the second switching valve, the condenser is connected to the air storage cylinder through the APU, the air storage cylinder is provided with an air pressure sensor, and the length of the first pipeline is greater than the length of the second pipeline; the vehicle controller is connected to the air compressor, the first switching valve, the second switching valve, the condenser, the APU and the air pressure sensor respectively;

[0035] The vehicle controller is used to obtain the ambient temperature of the vehicle after detecting high pressure on the vehicle; and to control the first switching valve and the second switching valve respectively according to the ambient temperature to switch the gas supply pipeline, the gas supply pipeline includes a first gas supply pipeline and a second gas supply pipeline, the first gas supply pipeline includes the first pipeline, and the second gas supply pipeline includes the second pipeline.

[0036] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the above-mentioned first aspect and / or various possible implementation methods of the first aspect.

[0037] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, is used to implement the above-mentioned first aspect and / or various possible implementation methods of the first aspect.

[0038] The embodiment of the present application provides a method for preventing the gas circuit from freezing in a vehicle, a vehicle controller, a vehicle and a medium, wherein the steel pipe between the air compressor and the condenser can be replaced with a first pipe and a second pipe of different lengths, and the air compressor is respectively connected to the first pipe and the second pipe through a first switching valve, and the condenser is respectively connected to the first pipe and the second pipe through a second switching valve. Through such a setting, after the vehicle is high pressure, the vehicle controller controls the first switching valve and the second switching valve respectively according to the ambient temperature, and can switch the use of the first pipe and the second pipe, thereby switching the gas supply pipeline. By switching different gas supply pipelines under different ambient temperatures, the temperature of the gas in the gas supply pipeline can be guaranteed, and the freezing of the gas supply pipeline of the vehicle can be effectively avoided, ensuring the smoothness of the gas circuit in the low temperature environment, thereby ensuring the normal control of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0040] Figure 1 It is a structural schematic diagram of a gas supply pipeline in the prior art;

[0041] Figure 2 A system architecture diagram of an embodiment of the present application;

[0042] Figure 3 A flow chart of a method for preventing air circuit icing of a vehicle according to an embodiment of the present application;

[0043] Figure 4 This is a schematic diagram of the structure of a vehicle controller according to an embodiment of the present application;

[0044] Figure 5 This is a schematic structural diagram of a vehicle controller according to another embodiment of the present application.

[0045] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0046] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0047] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0048] It should be noted that in the embodiments of the present application, certain software, components, models and other existing solutions in the industry may be mentioned, and they should be regarded as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of the present application, but it does not mean that the applicant has or will necessarily use the solution.

[0049] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0050] The vehicle's air circuit anti-icing method, vehicle controller, vehicle and medium of the present application can be used in the field of vehicle control technology, and can also be used in any field other than the field of vehicle control technology, such as the field of pipeline anti-icing technology, etc. The application field of the vehicle's air circuit anti-icing method, vehicle controller, vehicle and medium of the present application is not limited.

[0051] The vehicle air circuit anti-icing method, vehicle controller, vehicle and medium of the present application can be applied to scenarios involving air circuit anti-icing of structures using air pressure as a power source, and any scenario involving air circuit anti-icing of structures using air pressure as a power source, such as heavy trucks with air brakes, passenger cars with airbags, engineering vehicles with other air structures, engineering machinery, etc., can all be applied to the vehicle air circuit anti-icing method, vehicle controller, vehicle and medium of the present application.

[0052] Heavy trucks use high-pressure gas as power to brake the vehicle. The air is compressed by an air pump, and the pressurized air reaches the brake air chamber through pipes and valve bodies. The brake air chamber push rod extends and pushes the brake adjustment arm to brake.

[0053] In the related technology, since the air contains a certain amount of moisture, the gas in the air first passes through the air filter to filter the liquid water in the gas, and then enters the air compressor for pressurization. The pressurized gas has high pressure and temperature. The high-pressure gas is cooled by a 4-6m long steel pipe, and then dried and filtered by the air processing unit APU. Finally, the clean, low-temperature high-pressure gas enters the air storage cylinder for vehicle braking. In addition, electric heavy trucks use electric air compressors, which generally have a small exhaust volume, so the inflation time is longer and the APU drying time is longer. In order to relieve the APU pressure, a condenser is often added in front of the APU. The condenser can precipitate liquid water and cool the high-pressure gas.

[0054] For example, Figure 1 FIG. 1 is a schematic diagram of the structure of a gas supply pipeline in the prior art. Figure 1 As shown, the air supply pipeline includes an air compressor, a condenser, an APU, an air storage cylinder and a vehicle controller VCU. A brake steel pipe is arranged between the air compressor and the condenser. The VCU is respectively connected to the air compressor, the condenser, the APU and the air storage cylinder to control them.

[0055] The dew point is the temperature at which water vapor begins to condense under a specified pressure. When compressed air is cooled, the relative humidity increases. When the air is compressed, the temperature gradually drops. When the relative humidity reaches 100%, water droplets precipitate from the compressed air. The temperature at this time is the "pressure dew point" of the compressed air.

[0056] When the air pressure is constant, the lower the temperature, the lower the dew point, and the easier it is for water to precipitate. Therefore, when the ambient temperature is low, the air supply pipeline of the air compressor-steel pipe-condenser-APU-air tank is prone to ice, causing the air line to be blocked and affecting the normal control of the vehicle.

[0057] Under the condition of constant temperature, the higher the air pressure, the lower the dew point, and the easier it is for water to precipitate. Every time the air compressor finishes pumping air and the APU is unloaded, there will be residual high-pressure gas in the steel pipe, which will further cause the air supply pipeline to easily freeze.

[0058] Based on the above technical problems, the inventive concept of the present application is: how to provide a vehicle's air supply pipeline anti-icing solution that can prevent the vehicle's air supply pipeline from freezing, ensure the air path is unobstructed in a low-temperature environment, and thus ensure normal control of the vehicle.

[0059] The embodiments of the present application provide a method for preventing air circuit icing of a vehicle, a vehicle controller, a vehicle and a medium. The steel pipe between the air compressor and the condenser can be replaced with a first pipe and a second pipe of different lengths. After the vehicle is pressurized, the vehicle controller controls the first switching valve and the second switching valve respectively according to the ambient temperature, so as to switch the use of the first pipe and the second pipe, thereby switching the gas supply line. By switching different gas supply lines at different ambient temperatures, the temperature of the gas in the gas supply line can be guaranteed, and the dew point in the gas supply line can be increased, thereby effectively preventing the vehicle's gas supply line from icing, ensuring that the gas circuit is unobstructed in a low-temperature environment, and thus ensuring normal control of the vehicle.

[0060] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0061] Figure 2 This is a system architecture diagram of an embodiment of the present application, such as Figure 2As shown, the vehicle may include an air compressor, a condenser, an APU, an air storage cylinder, and an air pressure sensor. The air compressor is connected to the first pipeline and the second pipeline respectively through a first switching valve, the condenser is connected to the first pipeline and the second pipeline respectively through a second switching valve, the condenser is connected to the air storage cylinder through the APU, and the air storage cylinder is also connected to the air pressure sensor. The VCU is respectively connected to the air compressor, the first switching valve, the second switching valve, the condenser, the APU, and the air pressure sensor. After the VCU detects the high pressure on the vehicle, it obtains the ambient temperature of the vehicle; the first switching valve and the second switching valve are controlled according to the ambient temperature to switch the gas supply pipeline, the gas supply pipeline includes a first gas supply pipeline and a second gas supply pipeline, the first gas supply pipeline includes a first pipeline, and the second gas supply pipeline includes a second pipeline.

[0062] Figure 3 This is a flow chart of a vehicle air circuit anti-icing method according to an embodiment of the present application. This embodiment uses the vehicle controller as the execution subject to illustrate the vehicle air circuit anti-icing method. Figure 3 As shown, the vehicle's air path anti-icing method may include the following steps:

[0063] S301: After high voltage is detected on the vehicle, the ambient temperature of the vehicle is obtained.

[0064] In this embodiment, the vehicle may include an air compressor, a condenser, an air processing unit APU and an air tank. The air compressor is connected to the first pipe and the second pipe respectively through a first switching valve, the condenser is connected to the first pipe and the second pipe respectively through a second switching valve, and the condenser is connected to the air tank through the APU.

[0065] In this embodiment, the vehicle can be a vehicle that uses air pressure as a power source, such as a heavy truck with air brakes, a passenger car with airbags, an engineering vehicle with other air-using structures, engineering machinery, etc. The specific type of vehicle is not restricted here, as long as the vehicle has structures such as an air compressor, a condenser, an APU, and an air tank.

[0066] In this embodiment, the external gas is filtered by the air filter, then enters the air compressor for pressurization, then is cooled through the first pipeline / the second pipeline, then passes through the condenser to precipitate condensed water and further cool down, then enters the APU for drying and filtration, and then enters the air storage cylinder through the air pipe for use by the entire vehicle.

[0067] S302: Controlling the first switching valve and the second switching valve respectively according to the ambient temperature to switch the gas supply pipeline.

[0068] In this embodiment, the gas supply pipeline includes a first gas supply pipeline and a second gas supply pipeline, the first gas supply pipeline includes a first pipe, the second gas supply pipeline includes a second pipe, and the length of the first pipe is greater than the length of the second pipe. Exemplarily, the first pipe can be 4m or 5m, and the second pipe can be 2m or 3m.

[0069] In this embodiment, the first switching valve / the second switching valve can be an electrically controlled three-way switching valve or a manually controlled three-way switching valve, without any limitation.

[0070] In this embodiment, the steel pipe between the air compressor and the condenser can be replaced by a first pipeline and a second pipeline of different lengths, and the air compressor is connected to the first pipeline and the second pipeline respectively through a first switching valve, and the condenser is connected to the first pipeline and the second pipeline respectively through a second switching valve. Through such a setting, after the vehicle is high pressure, the vehicle controller controls the first switching valve and the second switching valve respectively according to the ambient temperature, and the use of the first pipeline and the second pipeline can be switched, thereby switching the gas supply pipeline. By switching different gas supply pipelines under different ambient temperatures, the temperature of the gas in the gas supply pipeline can be guaranteed, and the freezing of the vehicle's gas supply pipeline can be effectively avoided, ensuring the smoothness of the gas path in a low temperature environment, thereby ensuring normal control of the vehicle.

[0071] In a possible implementation, the above step S302 controls the first switching valve and the second switching valve according to the ambient temperature to switch the gas supply pipeline, which may include any one of the following:

[0072] S11: When the ambient temperature exceeds the preset temperature threshold, the first switching valve and the second switching valve are controlled respectively to execute the first air supply pipeline, which includes an air compressor, a first switching valve, a first pipeline, a second switching valve, a condenser, an APU and an air storage cylinder in sequence.

[0073] S12: When the ambient temperature does not exceed the preset temperature threshold, the first switching valve and the second switching valve are controlled respectively to execute the second air supply pipeline, which includes an air compressor, a first switching valve, a second pipeline, a second switching valve, a condenser, an APU and an air storage cylinder in sequence.

[0074] In this embodiment, the preset temperature threshold can be flexibly set by those skilled in the art according to actual conditions. For example, the temperature threshold can be 0° C. or −1° C., and no limitation is made here.

[0075] For example, taking the temperature threshold as 0°C, when the ambient temperature is higher than 0°C, the VCU can execute mode 1: control Figure 2The 21st port of the middle switching valve A (first switching valve) is open, and the 22nd port is closed. The 11th port of the switching valve B (second switching valve) is open, and the 12th port is closed. At this time, the air supply pipeline is a long loop, specifically air compressor-switching valve A-long steel pipe (first pipeline)-switching valve B-condenser-APU-air storage cylinder. When the temperature is high, the long loop can ensure the gas cooling effect and ensure that the APU intake temperature is lower than 65°C.

[0076] When the ambient temperature is lower than or equal to 0℃, there is a risk of icing in the pipeline. The VCU can execute mode 2: control Figure 2 The 21st port of the middle switching valve A (first switching valve) is closed and the 22nd port is opened, the 11th port of the switching valve B (second switching valve) is closed and the 12th port is opened. At this time, the air supply pipeline is a short circuit, specifically air compressor-switching valve A-short steel pipe (second pipeline)-switching valve B-condenser-APU-air storage cylinder. When the temperature is low, a short circuit is used to keep the pipeline at a certain temperature to avoid freezing.

[0077] Alternatively, the first switching valve / second switching valve can also be a manual valve, such as a three-way ball valve, which is suitable for use in areas with stable climate and detailed seasonal switching. Manual switching is to mode 2 in winter and to mode 1 in summer. If the vehicle operates between low altitude and high altitude, an electronically controlled switching valve can be used, which can be controlled by the VCU or a rocker switch. At the same time, the second switching valve can be replaced by a two-way one-way valve, that is, either the long steel pipe or the short steel pipe has high-pressure gas, which can lead to the three-way outlet.

[0078] In this embodiment, when the ambient temperature is high (exceeding the temperature threshold), a long loop (first air supply pipeline) can be used to ensure the gas cooling effect and ensure that the APU intake temperature is low. When the ambient temperature is low (not exceeding the temperature threshold), due to the low air compressor outlet temperature and the low pipeline temperature, a longer pipeline is not required to achieve the cooling effect. The use of a long loop may cause the APU intake temperature to be too low, and there is even a risk of icing. Therefore, a short loop (second air supply pipe) is used to maintain the gas temperature in the pipeline to avoid icing and ensure that the APU intake temperature is maintained at a certain level. By using a switching valve to switch between long and short pipelines, it can be simultaneously satisfied that the pipeline has a certain temperature when the temperature is low, and the pipeline cooling effect is good when the temperature is high. While ensuring the gas cooling effect, the vehicle's air supply pipeline is effectively prevented from icing, ensuring that the gas path is unobstructed in a low temperature environment.

[0079] In one possible implementation, the method may include:

[0080] After detecting that the vehicle is shut down, when the ambient temperature does not exceed the preset temperature threshold, after detecting that the shutdown duration exceeds the preset duration threshold, the exhaust port of the condenser / APU is controlled to open for a first time to release the gas in the first pipe / second pipe.

[0081] In this implementation, those skilled in the art can flexibly set the duration threshold and the first duration according to actual conditions, and no limitation is made here.

[0082] In this embodiment, under the condition of constant temperature, the higher the air pressure, the lower the dew point, the easier it is for water to precipitate. After the air compressor pumps out air and the APU is unloaded, there will be residual high-pressure gas in the steel pipe, which will further cause the air supply pipeline to freeze. Therefore, after detecting that the vehicle is stopped, it is necessary to execute the exhaust mode in time to release the gas in the air supply pipeline, increase the dew point in the air supply pipeline, prevent liquid water from precipitating, avoid freezing or prevent small ice crystals from growing.

[0083] Exemplarily, after detecting that the vehicle is shut down, the VCU monitors the shutdown duration and ambient temperature. When the shutdown duration exceeds 10 minutes and the ambient temperature does not exceed 0°C, the condenser exhaust port is controlled to open for 5 seconds to release the high-pressure gas in the pipeline.

[0084] In this embodiment, after the vehicle is turned off and stopped, high-pressure gas will remain in the pipeline. Pressurization will lower the dew point of the gas. When the dew point is lower than the ambient temperature, condensed water will precipitate, resulting in ice. Therefore, after the vehicle controller detects that the ambient temperature does not exceed the preset temperature threshold and the vehicle shutdown time exceeds the time threshold, it can control the exhaust port of the condenser / APU to open for a first time to release the high-pressure gas in the pipeline, thereby increasing the dew point in the air supply pipeline and avoiding the formation of condensed water and ice.

[0085] In a possible implementation, after obtaining the ambient temperature of the vehicle in step S301, the following steps may also be performed:

[0086] When the ambient temperature does not exceed the preset temperature threshold, the de-icing operation is performed: the air compressor is controlled to perform an air pumping operation, and the exhaust port of the condenser / APU is controlled to open for a second time period.

[0087] In this embodiment, the specific second duration can be flexibly set by those skilled in the art according to actual conditions. For example, the second duration can be 5 seconds or 6 seconds, and no limitation is made here.

[0088] For example, after the vehicle is high-pressured, when the VCU detects that the ambient temperature does not exceed 0°C, it first controls the air compressor to perform an air pumping operation, and then controls the exhaust port of the condenser / APU to be opened for 5s.

[0089] In this embodiment, after the vehicle is put on high pressure and before the vehicle is used, the VCU can perform a self-check and de-icing process of the energy supply system when it detects that the ambient temperature does not exceed the preset temperature threshold: turn on the air compressor to pump air, and open the exhaust port of the condenser / APU for a period of time, so that the high-pressure gas is discharged from the air supply pipeline, and at the same time take away possible condensed water and small ice crystals in the pipeline. The exhaust sound during the self-check process can also provide a signal to the outside world, and the driver can tell whether the pipeline is unobstructed based on the exhaust sound.

[0090] In a possible implementation, the vehicle may further include an air pressure sensor connected to the air tank. After obtaining the ambient temperature of the vehicle in step S301, the following steps may be further performed:

[0091] Step S1: During vehicle driving, when it is detected that the ambient temperature does not exceed a preset temperature threshold and the vehicle is not operating with gas, the current air pressure value of the air tank is obtained using an air pressure sensor.

[0092] Step S2: Control the air compressor to perform an inflation operation, determine the inflation time of this inflation operation, and the target air pressure value of the air tank after the inflation operation.

[0093] Step S3: Determine the air volume for this inflation operation according to the current air pressure value, the target air pressure value and the volume of the air storage cylinder.

[0094] Step S4: Determine the inflation efficiency of this inflation operation according to the inflation volume and inflation time, and determine whether the air supply pipeline is blocked according to the inflation efficiency.

[0095] In this embodiment, when the VCU detects that the ambient temperature does not exceed the preset temperature threshold, it will control the air compressor to perform air pumping operation only when it detects that the entire vehicle has no gas operation, that is, it gives priority to ensuring the vehicle's gas use during driving.

[0096] In this embodiment, the VCU can monitor the change in air pressure value of the air cylinder before and after the air compressor is inflated (from the previous air pressure value to the target air pressure value), and monitor the inflation time of the inflation operation. The volume of the air cylinder is known. According to the change in air pressure value of the air cylinder before and after the air compressor is inflated and the volume of the air cylinder, the inflation volume of this inflation operation can be accurately determined, and the inflation efficiency of this inflation operation can be calculated according to the inflation volume and the inflation time.

[0097] In this embodiment, when the ambient temperature does not exceed the preset temperature threshold, the VCU can control the air compressor to inflate the air cylinder when the entire vehicle is not operating with air, and judge whether there is blockage in the air supply pipeline based on the inflation efficiency, so as to promptly detect the risk of air line icing during vehicle driving.

[0098] In a possible implementation manner, the above step S4 determines whether the air supply pipeline is blocked according to the pumping efficiency, which may include:

[0099] S21: Determine whether the inflation efficiency is less than a preset efficiency threshold.

[0100] S22: If it is less than the efficiency threshold, it is determined that the air supply pipeline is blocked, and when it is detected that the air compressor is idle, a preset number of de-icing operations are performed: the air compressor is controlled to perform an air pumping operation, and the exhaust port of the condenser / APU is controlled to be open for a second time period.

[0101] S23: If the efficiency is not less than the efficiency threshold, it is determined that there is no blockage in the air supply pipeline.

[0102] In this embodiment, the specific efficiency threshold can be flexibly set by those skilled in the art according to actual conditions, and no limitation is made here. In addition, the preset number can also be flexibly set by those skilled in the art according to actual conditions, for example, the preset number can be 3 times or 4 times, and no limitation is made here.

[0103] In this embodiment, the VCU will perform a preset number of de-icing operations only when it detects that the air compressor is idle, that is, the vehicle's air supply is prioritized during driving.

[0104] In this embodiment, the gas in the pipeline after the APU is dried by a drying tank, and theoretically the possibility of ice blockage is low, while the gas in the steel pipe system before the APU is not dried, and the possibility of ice blockage is relatively high. Therefore, when it is determined that the gas pumping efficiency is less than the efficiency threshold, the pipeline can be de-iced by performing a preset number of de-icing operations, so that condensed water and small ice crystals are discharged through the condenser / APU.

[0105] In this embodiment, when the inflation efficiency is less than the efficiency threshold, it indicates that the air supply pipeline may be at risk of blockage. It is necessary to perform a certain number of de-icing operations when the air compressor is detected to be idle to remove condensed water and small ice crystals in the air supply pipeline as much as possible to avoid ice blockage in the air supply pipeline.

[0106] In a possible implementation manner, after performing the de-icing operation for a preset number of times in the above step S22, the following may also be included:

[0107] S31: re-execute the above steps S1-S3 to obtain the inflation efficiency after deicing.

[0108] S32: Determine whether the inflation efficiency after deicing is less than a preset efficiency threshold.

[0109] S33: If it is still less than the efficiency threshold, the gas supply pipeline blockage risk warning information is output through the instrument panel.

[0110] In this embodiment, the gas supply pipeline blockage risk warning information can be displayed in text form on the vehicle dashboard to promptly remind the driver.

[0111] In this embodiment, after performing a preset number of deicing operations, the above steps S1-S3 can be used again to obtain the inflation efficiency after deicing. If the inflation efficiency after deicing is still less than the efficiency threshold, the VCU can output air supply pipeline blockage risk warning information through the instrument panel to prompt the driver to promptly check whether the air path is blocked and take corresponding measures.

[0112] The vehicle air circuit anti-icing method of the present application is described below with reference to a specific embodiment.

[0113] In a specific embodiment, Figure 2 As shown, a heavy truck using air brakes includes an air compressor, a condenser, an APU, and an air tank. The air compressor is connected to the first pipeline and the second pipeline respectively through a first switching valve, the condenser is connected to the first pipeline and the second pipeline respectively through a second switching valve, and the condenser is connected to the air tank through the APU. The air circuit anti-icing process of the vehicle is as follows:

[0114] In the first step, after the vehicle controller detects the high voltage on the vehicle, it obtains the vehicle's ambient temperature and determines that the ambient temperature is below 0°C.

[0115] The second step is vehicle controller control Figure 2 Port 21 of the first switching valve is opened, and port 22 is closed; port 11 of the second switching valve is opened, and port 12 is closed, to implement the second air supply pipeline of the short circuit, specifically air compressor-first switching valve-short steel pipe (second pipeline)-second switching valve-condenser-APU-air storage tank.

[0116] In the third step, the vehicle controller performs the de-icing operation: controls the air compressor to perform the pumping operation, and controls the exhaust port of the condenser / APU to open for 5 seconds.

[0117] In the fourth step, when the vehicle controller detects that no air is needed during driving, it controls the air compressor to perform an air pumping operation and calculates the air pumping efficiency of this air pumping operation.

[0118] In the fifth step, the vehicle controller determines that the inflation efficiency is less than the preset efficiency threshold. When it detects that the air compressor is idle, it performs three de-icing operations: controlling the air compressor to perform inflation operation and controlling the exhaust port of the condenser / APU to open for 5 seconds.

[0119] In the sixth step, when the vehicle controller operates without using air, it controls the air compressor to perform air pumping operation and calculates the air pumping efficiency after deicing.

[0120] In the seventh step, if the vehicle controller determines that the inflation efficiency after deicing is still less than the efficiency threshold, it will output the air supply pipeline blockage risk warning information through the instrument panel to prompt the driver to promptly check whether the air line is blocked and take corresponding measures.

[0121] In the eighth step, after the vehicle controller detects that the vehicle is shut down and the shutdown time exceeds 10 minutes, it controls the exhaust port of the condenser / APU to open for 3 seconds to release the gas in the second pipeline.

[0122] Figure 4 This is a schematic diagram of the structure of a vehicle controller according to an embodiment of the present application. Figure 4 As shown, the vehicle controller includes: an acquisition module 41, which is used to acquire the ambient temperature of the vehicle after detecting the high pressure on the vehicle; a processing module 42, which is used to control the first switching valve and the second switching valve respectively according to the ambient temperature to switch the gas supply pipeline, the gas supply pipeline includes a first gas supply pipeline and a second gas supply pipeline, the first gas supply pipeline includes a first pipe, the second gas supply pipeline includes a second pipe, and the length of the first pipe is greater than the length of the second pipe.

[0123] The vehicle controller provided in the embodiment of the present application can execute the technical solution shown in the above method embodiment, and its implementation principle and beneficial effects are similar, which will not be repeated here.

[0124] Figure 5 This is a schematic diagram of the structure of a vehicle controller according to an embodiment of the present application. Figure 5 As shown, the vehicle controller includes: a processor 501, and a memory 502 that is communicatively connected to the processor 501; the memory 502 stores computer execution instructions; the processor 501 executes the computer execution instructions stored in the memory 502 to implement the steps of the vehicle's air circuit anti-icing method in the above-mentioned method embodiments.

[0125] In the above vehicle controller, the memory 502 and the processor 501 are electrically connected directly or indirectly to realize data transmission or interaction. For example, these elements can be electrically connected to each other through one or more communication buses or signal lines, such as through a bus connection. The memory 502 stores computer-executable instructions for implementing the data access control method, including at least one software function module that can be stored in the memory 502 in the form of software or firmware. The processor 501 executes various functional applications and data processing by running the software programs and modules stored in the memory 502.

[0126] The memory 502 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electric erasable programmable read-only memory (EEPROM), etc. The memory 502 is used to store programs, and the processor 501 executes the programs after receiving the execution instruction. Furthermore, the software programs and modules in the above-mentioned memory 502 may also include an operating system, which may include various software components and / or drivers for managing system tasks (such as memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.

[0127] The processor 501 may be an integrated circuit chip having the ability to process signals. The processor 501 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc. The methods, steps, and logic diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or any conventional processor.

[0128] An embodiment of the present application also provides a vehicle, such as Figure 2 As shown, the vehicle includes: an air compressor, a condenser, an air processing unit APU, an air storage cylinder and Figure 5 The vehicle controller shown.

[0129] The air compressor is connected to the first pipeline and the second pipeline respectively through the first switching valve, the condenser is connected to the first pipeline and the second pipeline respectively through the second switching valve, the condenser is connected to the air tank through the APU, the air tank is provided with an air pressure sensor, and the length of the first pipeline is greater than that of the second pipeline; the vehicle controller is respectively connected to the air compressor, the first switching valve, the second switching valve, the condenser, the APU and the air pressure sensor.

[0130] The vehicle controller is used to obtain the ambient temperature of the vehicle after detecting the high pressure on the vehicle; the first switching valve and the second switching valve are controlled respectively according to the ambient temperature to switch the gas supply pipeline, the gas supply pipeline includes a first gas supply pipeline and a second gas supply pipeline, the first gas supply pipeline includes a first pipeline, and the second gas supply pipeline includes a second pipeline.

[0131] An embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the steps of each method embodiment of the present application.

[0132] An embodiment of the present application further provides a computer program product, including a computer program, which implements the steps of each method embodiment of the present application when executed by a processor.

[0133] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present application.

[0134] It should be further noted that, although the various steps in the flowchart are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowchart may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these sub-steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0135] It should be understood that the above-mentioned device embodiments are only illustrative, and the device of the present application can also be implemented in other ways. For example, the division of units / modules in the above-mentioned embodiments is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units, modules or components can be combined, or can be integrated into another system, or some features can be ignored or not executed.

[0136] In addition, unless otherwise specified, each functional unit / module in each embodiment of the present application may be integrated into one unit / module, each unit / module may exist physically separately, or two or more units / modules may be integrated together. The above-mentioned integrated unit / module may be implemented in the form of hardware or in the form of a software program module.

[0137] In the above embodiments, the description of each embodiment has its own emphasis. For the part not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0138] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the appended claims.

[0139] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for preventing air path icing of a vehicle, characterized in that: The vehicle comprises an air compressor, a condenser, an air processing unit APU and an air storage cylinder, the air compressor is respectively connected to a first pipeline and a second pipeline through a first switching valve, the condenser is respectively connected to the first pipeline and the second pipeline through a second switching valve, the condenser is connected to the air storage cylinder through the APU, and the method comprises: After detecting high voltage on the vehicle, obtain the ambient temperature of the vehicle; The first switching valve and the second switching valve are controlled respectively according to the ambient temperature to switch the gas supply pipeline, the gas supply pipeline includes a first gas supply pipeline and a second gas supply pipeline, the first gas supply pipeline includes the first pipe, the second gas supply pipeline includes the second pipe, and the length of the first pipe is greater than the length of the second pipe.

2. The vehicle air path anti-icing method according to claim 1, characterized in that: The controlling the first switching valve and the second switching valve respectively according to the ambient temperature to switch the gas supply pipeline includes any one of the following: When the ambient temperature exceeds a preset temperature threshold, the first switching valve and the second switching valve are controlled respectively to execute a first air supply pipeline, wherein the first air supply pipeline sequentially includes an air compressor, a first switching valve, a first pipeline, a second switching valve, a condenser, an APU and an air storage cylinder; When the ambient temperature does not exceed the preset temperature threshold, the first switching valve and the second switching valve are controlled respectively to execute the second air supply pipeline, which sequentially includes an air compressor, a first switching valve, a second pipeline, a second switching valve, a condenser, an APU and an air tank.

3. The vehicle air path anti-icing method according to claim 1, characterized in that: Also includes: After detecting that the vehicle is shut down, when the ambient temperature does not exceed the preset temperature threshold, after detecting that the shutdown duration exceeds the preset duration threshold, the exhaust port of the condenser / APU is controlled to open for a first time period to release the gas in the first pipe / second pipe.

4. The vehicle air path anti-icing method according to claim 1, characterized in that: After obtaining the ambient temperature of the vehicle, the method further includes: When the ambient temperature does not exceed a preset temperature threshold, a de-icing operation is performed: the air compressor is controlled to perform an air pumping operation, and the exhaust port of the condenser / APU is controlled to be open for a second time period.

5. The vehicle air path anti-icing method according to any one of claims 1 to 4, characterized in that: The vehicle further includes an air pressure sensor connected to the air storage cylinder, and after obtaining the ambient temperature of the vehicle, further includes: Step S1: during the driving process of the vehicle, when it is detected that the ambient temperature does not exceed the preset temperature threshold and the vehicle is operating without gas, the current air pressure value of the air tank is obtained by using the air pressure sensor; Step S2: controlling the air compressor to perform an inflating operation, determining the inflating time of this inflating operation, and the target air pressure value of the air storage cylinder after the inflating operation; Step S3: determining the air volume of this inflation operation according to the current air pressure value, the target air pressure value and the volume of the air reservoir; Step S4: determining the inflation efficiency of the current inflation operation according to the inflation volume and the inflation time, and determining whether the air supply pipeline is blocked according to the inflation efficiency.

6. The vehicle air path anti-icing method according to claim 5, characterized in that: The determining whether the air supply pipeline is blocked according to the pumping efficiency includes: Determining whether the inflation efficiency is less than a preset efficiency threshold; If it is less than the efficiency threshold, it is determined that the air supply pipeline is blocked, and when the air compressor is detected to be idle, a preset number of de-icing operations are performed: the air compressor is controlled to perform an air pumping operation, and the exhaust port of the condenser / APU is controlled to be open for a second time period; If it is not less than the efficiency threshold, it is determined that there is no blockage in the air supply pipeline.

7. The vehicle air path anti-icing method according to claim 6, characterized in that: After the de-icing operation is performed for a preset number of times, the method further includes: Re-execute the above steps S1-S3 to obtain the air pumping efficiency after deicing; Determining whether the inflation efficiency after deicing is less than a preset efficiency threshold; If it is still less than the efficiency threshold, the gas supply pipeline blockage risk warning information will be output through the instrument panel.

8. A vehicle controller, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory is used to store computer-executable instructions; The processor is used to execute the computer-executable instructions stored in the memory, so that the processor executes the vehicle air circuit anti-icing method according to any one of claims 1-7.

9. A vehicle, characterized in that: include: An air compressor, a condenser, an air processing unit APU, an air storage cylinder, and a vehicle controller as claimed in claim 8; The air compressor is connected to the first pipeline and the second pipeline respectively through the first switching valve, the condenser is connected to the first pipeline and the second pipeline respectively through the second switching valve, the condenser is connected to the air storage cylinder through the APU, the air storage cylinder is provided with an air pressure sensor, and the length of the first pipeline is greater than the length of the second pipeline; the vehicle controller is connected to the air compressor, the first switching valve, the second switching valve, the condenser, the APU and the air pressure sensor respectively; The vehicle controller is used to obtain the ambient temperature of the vehicle after detecting high pressure on the vehicle; and to control the first switching valve and the second switching valve respectively according to the ambient temperature to switch the gas supply pipeline, the gas supply pipeline includes a first gas supply pipeline and a second gas supply pipeline, the first gas supply pipeline includes the first pipeline, and the second gas supply pipeline includes the second pipeline.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the vehicle air circuit anti-icing method according to any one of claims 1 to 7.

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