Vehicle control method, computer storage medium, vehicle controller and vehicle

Abstract

The invention discloses a vehicle control method, a computer storage medium, a vehicle controller and a vehicle. The vehicle control method comprises the steps that gas pressure in a gas supply system where an engine is located is obtained; when the gas pressure is lower than a first pressure threshold value, a vehicle instrument is controlled to carry out engine pre-stop alarm prompt, and post-processing working condition information is obtained; and controlling the engine to stop according to the post-processing working condition information. According to the vehicle control method, the vehicle engine is actively controlled to stop, an engine pre-stop alarm prompt is given to a driver, the driver has time to take corresponding safety measures, meanwhile, the working condition of the post-processing device is monitored, and the post-processing device is prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a vehicle control method, a computer storage medium, a vehicle controller and a vehicle. Background Art

[0002] At present, natural gas vehicles occupy a large share in the market, and gas pressure is very important for the power, economy, safety and other performance of natural gas vehicles. During the use of the vehicle, the gas pressure is too low many times, that is, the gas pressure in the common rail on the engine is too low, resulting in the risk of burning of the post-processing device, and even the engine is passively shut down due to lack of fuel.

[0003] In the related art, the engine does not actively shut down when the gas pressure is too low, but only issues a fault alarm. However, if the engine suddenly shuts down passively, the driver cannot respond, and the low gas pressure causes the post-processing temperature to be too high, resulting in melting and the risk of burning the vehicle. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a vehicle control method, which actively controls the vehicle engine to shut down, and gives the driver an engine pre-shutdown alarm prompt, so that the driver has time to take corresponding safety measures, and at the same time monitors the working condition of the post-processing device to avoid damage to the post-processing device.

[0005] A second objective of the present invention is to provide a computer storage medium.

[0006] A third objective of the present invention is to provide a vehicle controller.

[0007] A fourth object of the present invention is to provide a vehicle.

[0008] In order to solve the above problems, an embodiment of the first aspect of the present invention proposes a vehicle control method, including: obtaining the gas pressure in the gas supply system where the engine is located; when the gas pressure is lower than a first pressure threshold, controlling the vehicle instrument to issue an engine pre-shutdown alarm prompt, and obtaining post-processing operating condition information; and controlling the engine to shut down according to the post-processing operating condition information.

[0009] According to the vehicle control method of an embodiment of the present invention, when the gas pressure is too low, an engine pre-shutdown alarm is given to the driver, the driver has time to respond and can take corresponding safety measures, and the engine is controlled to shut down by monitoring the working condition of the post-processing device, thereby avoiding damage to the post-processing device.

[0010] In some embodiments, controlling the engine to shut down according to the after-treatment operating condition information includes: controlling the engine to shut down when the after-treatment operating condition information indicates that the temperature of the after-treatment catalyst is in a rising state and the duration for which the temperature of the after-treatment catalyst is in the rising state reaches a preset duration, wherein the preset duration is less than or equal to a post-treatment allowed time threshold.

[0011] In some embodiments, the engine pre-shutdown alarm prompt includes a first-level alarm prompt and a second-level alarm prompt, and the vehicle instrument is controlled to perform an engine pre-shutdown alarm prompt, including: if the after-treatment catalyst temperature is greater than the after-treatment normal temperature threshold and less than or equal to the first after-treatment tolerance limit temperature, then the vehicle instrument is controlled to perform a first-level alarm prompt; if the after-treatment catalyst temperature is greater than the first after-treatment tolerance limit temperature and less than or equal to the second after-treatment tolerance limit temperature, then the vehicle instrument is controlled to perform a second-level alarm prompt.

[0012] In some embodiments, the method further includes: when the gas pressure is lower than a second pressure threshold and higher than the first pressure threshold, controlling the vehicle instrument to issue a pressure failure alarm prompt.

[0013] A second aspect of the present invention provides a computer storage medium, wherein the computer program, when executed by a processor, implements the vehicle control method of the above embodiment.

[0014] The third aspect of the present invention proposes a vehicle controller, comprising: at least one processor; a memory communicatively connected to at least one of the processors; wherein the memory stores a computer program executable by at least one of the processors, and when at least one of the processors executes the computer program, the vehicle control method of the above embodiment is implemented.

[0015] The vehicle controller according to the embodiment of the present invention executes the vehicle control method of the above embodiment through the processor, actively controls the vehicle engine to shut down, and gives the driver an engine pre-shutdown alarm prompt, so that the driver has time to take corresponding safety measures. At the same time, the working condition of the post-processing device is monitored to avoid damage to the post-processing device.

[0016] A fourth aspect of the present invention provides a vehicle, comprising: an instrument; an air supply system, the air supply system comprising an engine; and a vehicle controller of the above embodiment, the vehicle controller being connected to the engine and the instrument.

[0017] The vehicle according to the embodiment of the present invention actively controls the vehicle engine to shut down by adopting the vehicle controller of the above embodiment, and gives the driver an engine pre-shutdown alarm through the instrument, so that the driver has time to take corresponding safety measures, and at the same time monitors the working condition of the post-processing device to avoid damage to the post-processing device.

[0018] In some embodiments, the gas supply system further includes a gas tank, and the gas tank is used to provide LNG fuel or CNG fuel to the engine.

[0019] In some embodiments, the above-mentioned vehicle also includes: an audible and visual alarm device, which is connected to the vehicle controller and is used to provide an audible and visual alarm prompt when the gas pressure is lower than the second pressure threshold and higher than the first pressure threshold.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a flow chart of a vehicle control method according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of a vehicle control method according to an embodiment of the present invention;

[0024] Figure 3 is a block diagram of a vehicle controller according to an embodiment of the present invention;

[0025] Figure 4 is a block diagram of a vehicle 100 according to an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of a gas supply system according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] Vehicle 100;

[0029] Vehicle controller 10; instrument 20; air supply system 30; sound and light alarm device 40;

[0030] Processor 1; memory 2; engine 3; gas tank 4. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0032] In order to solve the above problems, the first embodiment of the present invention proposes a vehicle control method, which actively controls the vehicle engine to shut down and gives the driver an engine pre-shutdown alarm prompt, so that the driver has time to take corresponding safety measures. At the same time, the working condition of the post-processing device is monitored to avoid damage to the post-processing device.

[0033] Reference below Figure 1 A vehicle control method according to an embodiment of the present invention is described, and the vehicle control method at least includes steps S1 to S3.

[0034] Step S1, obtaining the fuel gas pressure in the fuel gas supply system where the engine is located.

[0035] Specifically, a pressure sensor is installed in the gas supply system to obtain the gas pressure in the gas supply system where the engine is located, and the obtained gas pressure is sent to the vehicle controller.

[0036] Step S2, when the gas pressure is lower than the first pressure threshold, the vehicle instrument is controlled to issue an engine pre-shutdown alarm and obtain post-processing operating condition information.

[0037] Specifically, after receiving the gas pressure, the vehicle controller will compare the gas pressure with the first pressure threshold. If the gas pressure is not lower than the first pressure threshold, the vehicle will operate normally. If the gas pressure is lower than the first pressure threshold, the gas pressure is too low at this time. If the engine continues to run, it may be dangerous. Therefore, the vehicle controller controls the vehicle instrument to issue an engine pre-shutdown alarm prompt. The engine pre-shutdown alarm prompt can be used to remind the driver of the engine shutdown time by setting a countdown. When the gas pressure is too low, the vehicle controller will also obtain the post-processing condition information and monitor the working condition of the post-processing device to avoid damage to the post-processing device due to low gas pressure. The first pressure threshold is the gas pressure at which the engine can operate normally. It can be set according to actual conditions and is not specifically limited here. For example, when the engine operates normally, the gas pressure range is 400-1000kPa, and the first pressure threshold can be 400kPa, 450kPa, 500kPa, etc. The post-processing condition information can include the post-processing operating temperature, etc., which is not specifically limited here.

[0038] Step S3, controlling the engine to shut down according to the post-processing operating condition information.

[0039] Specifically, the vehicle controller monitors the operating condition of the post-processing device through the post-processing operating condition information to avoid damage to the post-processing device due to too low a gas pressure. For example, if it is monitored according to the post-processing operating condition information that the post-processing device may melt due to too low a gas pressure, the engine is controlled to shut down to avoid damage to the post-processing device.

[0040] According to the vehicle control method of an embodiment of the present invention, when the gas pressure is too low, an engine pre-shutdown alarm is given to the driver, the driver has time to respond and can take corresponding safety measures, and the engine is controlled to shut down by monitoring the working condition of the post-processing device, thereby avoiding damage to the post-processing device.

[0041] In some embodiments, the engine is controlled to shut down according to post-processing operating condition information, including controlling the engine to shut down when the post-processing operating condition information indicates that the temperature of the after-treatment catalyst is in a rising state and the duration for which the temperature of the after-treatment catalyst is in the rising state reaches a preset duration, wherein the preset duration is less than or equal to a post-processing allowed time threshold.

[0042] Specifically, if the vehicle controller obtains that the temperature of the after-treatment catalyst is in a rising state and the duration for which the temperature of the after-treatment catalyst is in the rising state reaches a preset time, it is determined that the after-treatment device may have burned out, etc. To avoid damage to the after-treatment device, the vehicle air conditioner controls the engine to shut down. The preset time is less than or equal to the allowed time threshold for after-treatment to ensure that the catalyst working time is within the safe working time. The preset time for safe working time can be set according to the model or type of the catalyst, and no specific restrictions are made here.

[0043] In some embodiments, the engine pre-shutdown alarm prompt includes a first-level alarm prompt and a second-level alarm prompt, and the vehicle instrument is controlled to perform an engine pre-shutdown alarm prompt, including if the after-treatment catalyst temperature is greater than the after-treatment normal temperature threshold and less than or equal to the first after-treatment tolerance limit temperature, then the vehicle instrument is controlled to perform a first-level alarm prompt; if the after-treatment catalyst temperature is greater than the first after-treatment tolerance limit temperature and less than or equal to the second after-treatment tolerance limit temperature, then the vehicle instrument is controlled to perform a second-level alarm prompt.

[0044] Specifically, when the temperature of the after-treatment catalyst is greater than the normal temperature threshold of the after-treatment and is less than or equal to the first after-treatment tolerance limit temperature, the catalyst temperature rises but the catalyst temperature can be temporarily tolerated at this time. The vehicle controller controls the vehicle instrument to issue a first-level alarm prompt, thereby reminding the driver that the catalyst temperature has risen and corresponding measures should be taken; if the temperature of the after-treatment catalyst is greater than the first after-treatment tolerance limit temperature and is less than or equal to the second after-treatment tolerance limit temperature, the catalyst temperature will reach the catalyst tolerance temperature limit. If it continues to rise, the catalyst may cause damage to the after-treatment device or vehicle combustion. The vehicle controller controls the instrument to issue a second-level alarm prompt, thereby reminding the driver that the vehicle controller will control the engine to shut down actively and the driver should take corresponding measures immediately.

[0045] Among them, the post-treatment normal temperature threshold, the first post-treatment tolerance limit temperature and the second post-treatment tolerance limit temperature threshold can be set according to the catalyst model and type, and no specific limitation is made here.

[0046] In some embodiments, the method further includes controlling the vehicle instrument to issue a pressure failure alarm prompt when the gas pressure is lower than the second pressure threshold and higher than the first pressure threshold.

[0047] Specifically, when the gas pressure is lower than the second pressure threshold and higher than the first pressure threshold, the gas pressure is low but has not reached the extremely low value of the gas pressure, and the temperature of the post-processing catalyst is still within the normal operating temperature range, the vehicle controller controls the vehicle instrument to issue a pressure fault alarm prompt to prompt the driver to take measures to move the vehicle to a safe location or a maintenance service station, check the cause of the low gas pressure, and control the engine to reduce torque to a reduced speed state. The pressure fault alarm prompt can be a countdown reminder on the instrument, etc.

[0048] Exemplary, reference Figure 2 As shown, Figure 2 Schematic diagram of a vehicle control method according to an embodiment of the present invention, wherein AD is the engine torque curve, EJ is the after-treatment catalyst temperature curve, point B is the engine torque at the second pressure threshold, point C is the engine torque at the first pressure threshold, point G is the after-treatment normal temperature threshold, point H is the first after-treatment tolerance limit temperature, and point I is the second after-treatment tolerance limit temperature.

[0049] Among them, the engine in section AB operates normally, and the gas pressure is in the normal operating range. When the gas pressure is less than the second pressure threshold, the engine limits the torque. When the gas pressure is less than the first pressure threshold, the gas pressure has reached the extremely low value of the gas pressure, and the engine torque is reduced to E. At this time, the catalyst temperature is F, which is still in the normal operating temperature range. If no corresponding measures are taken, the catalyst temperature will rise. The time it takes for the catalyst temperature to rise from E to I is the post-processing allowable time threshold.

[0050] A second aspect of the present invention provides a computer storage medium, and when a computer program is executed by a processor, the vehicle control method of the above embodiment is implemented.

[0051] A third aspect of the present invention provides a vehicle controller 10, referring to Figure 3 As shown, the vehicle controller 10 includes at least one processor 1 and a memory 2 communicatively connected to the at least one processor 1 .

[0052] The memory 2 stores a computer program that can be executed by at least one processor 1 , and the vehicle control method of the above embodiment is implemented when the at least one processor 1 executes the computer program.

[0053] According to the vehicle controller 10 of the embodiment of the present invention, the processor 1 executes the vehicle control method of the above embodiment, actively controls the vehicle engine to shut down, and gives the driver an engine pre-shutdown alarm prompt, so that the driver has time to take corresponding safety measures. At the same time, the working condition of the post-processing device is monitored to avoid damage to the post-processing device.

[0054] A fourth aspect of the present invention provides a vehicle 100, referring to Figure 4 The illustrated vehicle 100 includes a meter 20 , an air supply system 30 , and a vehicle controller 10 .

[0055] The air supply system 30 includes an engine 3 , and the vehicle controller 10 is connected to the engine 3 and the meter 20 .

[0056] According to the vehicle 100 of the embodiment of the present invention, by adopting the vehicle controller 10 of the above-mentioned embodiment, the vehicle engine 3 is actively controlled to shut down, and an engine pre-shutdown alarm is given to the driver through the instrument 20, so that the driver has time to take corresponding safety measures, and at the same time monitors the working condition of the post-processing device to avoid damage to the post-processing device.

[0057] In some embodiments, reference Figure 4 As shown, the gas supply system 30 further includes a gas tank 4 .

[0058] The gas tank 4 is used to provide LNG (Liquefied Natural Gas) fuel or CNG (Compressed Natural Gas) fuel to the engine.

[0059] Exemplary, reference Figure 5 As shown, Figure 5 This is a schematic diagram of an air supply system 30 according to an embodiment of the present invention. When the air supply system provides gas for a vehicle, the fuel in the gas tank 4 must pass through the above-mentioned device before it can be used. After the fuel enters the fuel cut-off valve through the gas tank 4, the pressure in the pressure regulator controller is high pressure. The fuel enters the gas filter through the pressure regulator controller, and then enters the gas injection valve with a medium pressure, and finally enters the mixing chamber through the gas injection valve with a low pressure.

[0060] In some embodiments, reference Figure 4 As shown, the vehicle 100 further includes an audible and visual alarm device 40 .

[0061] The sound and light alarm device 40 is connected to the vehicle controller 10 and is used to give a sound and light alarm prompt when the gas pressure is lower than the second pressure threshold and higher than the first pressure threshold.

[0062] Specifically, when the gas pressure is lower than the second pressure threshold and higher than the first pressure threshold, the gas pressure is low but has not reached the extremely low value of the gas pressure, and the temperature of the after-treatment catalyst is still within the normal operating temperature range. The vehicle controller 10 controls the sound and light alarm device 40 to give a sound and light alarm prompt, so as to prompt the driver to take measures to move the vehicle to a safe location or a maintenance service station to check the cause of the low gas pressure.

[0063] In the description of this specification, any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code including one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0064] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing in a suitable manner if necessary, and then stored in a computer memory.

[0065] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0066] A person skilled in the art may understand that all or part of the steps in the above-mentioned embodiment method may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0067] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0068] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0070] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vehicle control method, characterized in that: include: Obtain the gas pressure in the gas supply system where the engine is located; When the gas pressure is lower than a first pressure threshold, controlling the vehicle instrument to give an engine pre-shutdown alarm prompt and obtaining post-processing operating condition information; The engine is controlled to shut down according to the post-processing operating condition information.

2. The vehicle control method according to claim 1, characterized in that: Controlling the engine to shut down according to the post-processing operating condition information includes: When the post-treatment operating condition information indicates that the temperature of the post-treatment catalyst is in an increasing state and the duration for which the temperature of the post-treatment catalyst is in the increasing state reaches a preset duration, the engine is controlled to shut down, wherein the preset duration is less than or equal to a post-treatment allowable time threshold.

3. The vehicle control method according to claim 1, characterized in that: The engine pre-shutdown alarm prompt includes a first-level alarm prompt and a second-level alarm prompt, and controlling the vehicle instrument to perform the engine pre-shutdown alarm prompt includes: If the temperature of the post-treatment catalyst is greater than the post-treatment normal temperature threshold and less than or equal to the first post-treatment tolerance limit temperature, the vehicle instrument is controlled to issue a first-level alarm prompt; If the temperature of the after-treatment catalyst is greater than the first after-treatment tolerance limit temperature and less than or equal to the second after-treatment tolerance limit temperature, the vehicle instrument is controlled to issue a secondary alarm prompt.

4. The vehicle control method according to claim 1, characterized in that: The method further comprises: When the gas pressure is lower than the second pressure threshold and higher than the first pressure threshold, the vehicle instrument is controlled to issue a pressure failure alarm prompt.

5. A computer storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the vehicle control method according to any one of claims 1 to 4 is implemented.

6. A vehicle controller, characterized in that: include: at least one processor; a memory communicatively coupled to at least one of the processors; Wherein, the memory stores a computer program that can be executed by at least one of the processors, and when at least one of the processors executes the computer program, the vehicle control method according to any one of claims 1 to 4 is implemented.

7. A vehicle, characterized in that: include: meter; An air supply system, the air supply system comprising an engine; The vehicle controller according to claim 6, wherein the vehicle controller is connected to the engine and the instrument.

8. The vehicle according to claim 7, characterized in that The gas supply system further includes a gas tank, and the gas tank is used to provide LNG fuel or CNG fuel to the engine.

9. The vehicle according to claim 7 or 8, characterized in that Also includes: An audible and visual alarm device is connected to the vehicle controller and is used to provide an audible and visual alarm prompt when the gas pressure is lower than a second pressure threshold and higher than the first pressure threshold.

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