CN115750120A

CN115750120A - Gas leakage detection method and device, vehicle and storage medium

Info

Publication number: CN115750120A
Application number: CN202211642106.2A
Authority: CN
Inventors: 唐志刚; 卫阳飞; 李哲; 王井山; 曲业源; 郑浩楠
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-03-07

Abstract

The invention discloses a gas leakage detection method, a gas leakage detection device, a vehicle and a storage medium. The gas leakage detection method comprises the following steps: after an engine ECU is electrified, judging whether a gas leakage fault exists when the engine is not started or not, and controlling the engine to start after the gas leakage fault is detected; after the engine is in a running state, if the engine is in a fuel cut-off state and the duration of the fuel cut-off state of the engine exceeds a state duration threshold, reading the current oxygen concentration value of an oxygen sensor in front of the engine; and determining that the gas has nozzle inner leakage fault or gas outer leakage fault according to the current oxygen concentration value. The invention can accurately judge the gas leakage direction, execute different fault actions according to different leakage faults and reasonably implement the maintenance and protection of the gas system.

Description

Gas leakage detection method and device, vehicle and storage medium

Technical Field

The invention relates to the technical field of gas leakage diagnosis, in particular to a gas leakage detection method, a gas leakage detection device, a vehicle and a storage medium.

Background

Since the natural gas engine appeared in the early years of the last century, the technology of the natural gas engine is mature day by day through the development of eighty years, and at present, most of the natural gas engines are modified from the existing diesel engine or gasoline engine type, and in addition, the gap in the technical level is large due to the wide application field of the existing natural gas engines.

The natural gas engine adopts general gas nozzle, and it can destroy engine air-fuel ratio control to appear leaking when gas nozzle, causes the interior unusual burning of jar, causes emission deterioration, engine damage, causes the conflagration to endanger personal safety even, and prior art can't distinguish simultaneously that the gas leaks in the nozzle or the gas pipeline is to the atmosphere outward leakage.

Disclosure of Invention

The invention provides a gas leakage detection method, a gas leakage detection device, a vehicle and a storage medium, and aims to solve the problem that in the prior art, whether gas leaks from a nozzle or from a gas pipeline to the outside of the atmosphere cannot be distinguished.

According to an aspect of the present invention, there is provided a gas leakage detecting method including:

after an engine ECU is electrified, judging whether a gas leakage fault exists when the engine is not started or not, and controlling the engine to start after the gas leakage fault exists;

after the engine is in a running state, if the engine is in a fuel cut-off state and the duration of the fuel cut-off state of the engine exceeds a state duration threshold, reading the current oxygen concentration value of an oxygen sensor in front of the engine;

and determining that the gas has nozzle inner leakage fault or gas outer leakage fault according to the current oxygen concentration value.

Optionally, after the determining whether the gas leakage fault is detected when the engine is not started, the method further includes:

and if no gas leakage fault exists, judging the gas leakage fault after the engine ECU is electrified.

Optionally, the gas leakage detection method further includes:

if a gas leakage fault exists after an engine ECU is electrified, controlling the engine to start, and judging whether the engine is in a fuel cut-off state and whether the duration time of the fuel cut-off state of the engine exceeds a state duration time threshold value;

if no gas leakage fault exists after the engine ECU is electrified, the engine is controlled to be started, and a gas leakage power-off detection function is activated to control the engine ECU to be powered off when the rotating speed of the engine is smaller than a set rotating speed threshold value or a power-off instruction is received.

Optionally, the determining the gas leakage fault after the engine ECU is powered on includes:

after an engine ECU is powered on, detecting a gas pressure drop value of a pipeline between a gas cut-off valve and a gas injection valve, and judging whether a gas leakage fault exists in the gas nozzle according to the gas pressure drop value.

Optionally, the determining that the gas has the nozzle inner leakage fault or the gas outer leakage fault according to the current oxygen concentration value includes:

if the current oxygen concentration value is larger than a set oxygen concentration threshold value, determining that the gas has an internal leakage fault of the nozzle;

and if the current oxygen concentration value is less than or equal to the set oxygen concentration threshold value, determining that the gas leakage fault exists.

Optionally, the gas leakage detection method further includes:

when the gas has nozzle inner leakage fault, executing a catalyst protection strategy;

and when the gas leakage fault exists, executing a vehicle safety protection strategy.

Optionally, after the engine is in the running state, the method further comprises:

and if the engine is not in the fuel cut-off state or the duration of the fuel cut-off state of the engine does not exceed the state duration threshold, continuing to monitor the running state of the engine.

According to another aspect of the present invention, there is provided a gas leakage detecting device including:

the engine starting detection module is used for judging whether a gas leakage fault exists when the engine is not started or not after the engine ECU is electrified, and controlling the engine to start after the gas leakage fault exists;

the oxygen concentration value acquisition module is used for reading the current oxygen concentration value of an oxygen sensor in front of the engine if the engine is in a fuel cut-off state and the duration of the fuel cut-off state of the engine exceeds a state duration threshold after the engine is in a running state;

and the leakage direction determining module is used for determining that the gas has the nozzle inner leakage fault or the gas outer leakage fault according to the current oxygen concentration value.

According to another aspect of the present invention, there is provided a vehicle including:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,

the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the gas leak detection method according to any of the embodiments of the present invention.

According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to implement the gas leak detection method according to any one of the embodiments of the present invention when the computer instructions are executed.

According to the technical scheme of the embodiment of the invention, after the ECU of the engine is electrified, whether the gas leakage fault exists when the engine is not started is judged, and the engine is controlled to be started after the gas leakage fault is detected; after the engine is in a running state, if the engine is in a fuel cut-off state and the duration of the fuel cut-off state of the engine exceeds a state duration threshold, reading the current oxygen concentration value of an oxygen sensor in front of the engine; and determining that the gas has nozzle inner leakage fault or gas outer leakage fault according to the current oxygen concentration value. The invention solves the problem that the prior art can not distinguish whether the gas leakage is the leakage in the nozzle or the leakage of the gas pipeline to the atmosphere, realizes the accurate judgment of the gas leakage direction, executes different fault actions according to different leakage faults and reasonably implements the maintenance and protection of the gas system.

It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of a gas leakage detection method according to an embodiment of the present invention;

FIG. 2 is a schematic block diagram of a method for detecting gas leakage according to an embodiment of the present invention;

FIG. 3 is a flow chart of a gas leakage detection method according to a second embodiment of the present invention;

fig. 4 is a schematic structural diagram of a gas leakage detection device according to a third embodiment of the present invention;

fig. 5 is a schematic configuration diagram of a vehicle implementing the gas leak detection method of the embodiment of the invention.

Detailed Description

In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example one

Fig. 1 is a flowchart of a gas leakage detection method according to an embodiment of the present invention, which is applicable to a case where a leakage fault of a gas nozzle of a natural gas engine is diagnosed, and the gas leakage detection method may be performed by a gas leakage detection device, which may be implemented in a form of hardware and/or software, and may be configured in a vehicle having the natural gas engine. As shown in fig. 1, the gas leakage detection method includes:

s110, after an engine ECU is powered on, judging whether a gas leakage fault exists when the engine is not started or not, and controlling the engine to start after the gas leakage fault exists.

Among them, an Electronic Control Unit (ECU) is also called a "traveling computer" or a "vehicle-mounted computer", etc., which is a short name for an Electronic Control Unit of an automobile engine, commonly called an engine computer. The ECU has the function of normally operating the engine by continuously collecting signals from various sensors of the automobile and controlling ignition, oil injection, air-fuel ratio, idling, exhaust gas recirculation and the like of the engine when the engine works, and the ECU also has an engine fault self-diagnosis function.

The engine ECU is powered on, that is, when a vehicle key presses an unlock key or opens a vehicle door or presses a start key, the engine ECU is powered on by a wake-up signal, and the engine is controlled to be powered on.

Specifically, after the engine ECU is powered on, and the engine is not started, whether or not it is detected that there has been a gas leakage fault. Whether the gas leakage fault exists in the specific gas can be determined through the existing gas leakage diagnosis method, namely whether the gas leakage fault exists in the specific gas is judged through a gas pressure drop value.

Referring to fig. 2, after the engine is powered on, the gas cut-off valve is opened to inflate and then is closed, at this time, a pipeline between the gas cut-off valve and the injection valve is equivalent to a closed container, a gas pressure drop value of the pipeline between the gas cut-off valve and the gas injection valve is detected, if the gas pressure drop value is lower than a set limit value, the gas nozzle is considered to have a leakage fault, and if the gas pressure drop value is not lower than the set limit value, the gas nozzle is considered to have no leakage fault.

The set limit value can be selected and set by a person skilled in the art according to actual situations, and the embodiment does not limit this.

The gas pressure of the pipeline between the gas cut-off valve and the gas injection valve can be detected by a pressure sensor and can also be detected by other prior art, and the embodiment does not limit the pressure.

On the basis, after the engine ECU is powered on, if it is detected that there is no gas leakage fault, the gas leakage fault is determined after the engine ECU is powered on, and at this time, the method for determining whether there is a gas leakage fault may be determined by using the method for determining the gas pressure drop value in fig. 2.

Further, if a gas leakage fault exists when the engine is powered off after the engine ECU is powered on, controlling the engine to start, and further determining whether the engine is in the fuel cut-off state, and whether the duration of the fuel cut-off state of the engine exceeds a state duration threshold, namely continuing to execute step S120; if no gas leakage fault exists when the engine is powered off after the engine ECU is powered on, firstly, judging the gas leakage fault, if gas leakage exists, executing action according to the further measures, if no gas leakage exists, controlling the engine to start, and activating a gas leakage power-off detection function to detect the gas leakage fault and control the engine ECU to power off when the rotating speed of the engine is smaller than a set rotating speed threshold value or a power-off instruction is received.

And S120, after the engine is in the running state, if the engine is in the fuel cut-off state and the duration time of the fuel cut-off state of the engine exceeds a state duration time threshold, reading the current oxygen concentration value of the oxygen sensor in front of the engine.

The engine operating state refers to a state in which the engine is operated under various loads, and the engine is specifically in the operating state, which is not limited in this embodiment.

The state duration threshold may be set by a person skilled in the art according to actual situations, and the present embodiment does not limit this.

On the basis, if the engine is not in the fuel cut state or the duration of the fuel cut state of the engine does not exceed the state duration threshold, the running state of the engine is continuously monitored.

The oxygen sensor of the vehicle is actually an important opinion feedback sensor in an automatic control system of an electronic fuel injection engine, and is mainly divided into 2 types of zirconium dioxide and titanium dioxide which are all assembled on an exhaust pipe of the engine. The vehicle oxygen sensor is divided into a front oxygen sensor and a rear oxygen sensor, and is bounded by a three-way catalyst, wherein the front oxygen sensor is arranged in front of the three-way catalyst, and the rear oxygen sensor is arranged behind the three-way catalyst.

The front oxygen sensor is used for detecting the oxygen concentration in the exhaust gas of the vehicle engine and then sending the obtained information to the engine ECU in a signal mode, and the engine ECU carries out feedback adjustment on the air-fuel ratio according to the obtained oxygen concentration information.

In this embodiment, when the engine is in the fuel cut state and the duration of the fuel cut state of the engine exceeds the state duration threshold, the current oxygen concentration value of the oxygen sensor before the engine is read, where the current oxygen concentration value is the current oxygen concentration in the exhaust gas of the vehicle engine detected in real time.

S130, determining that the gas has nozzle inner leakage fault or gas outer leakage fault according to the current oxygen concentration value.

On the basis, judging the gas leakage direction according to the current oxygen concentration value, specifically, if the current oxygen concentration value is greater than a set oxygen concentration threshold value, determining that the gas has a nozzle internal leakage fault; and if the current oxygen concentration value is less than or equal to the set oxygen concentration threshold value, determining that the gas leakage fault exists.

Further, on the basis, after the fact that the nozzle inner leakage fault or the gas outer leakage fault exists in the gas is determined, technicians in the field can be reminded to find out the gas leakage fault in a targeted mode according to the nozzle inner leakage fault or the gas outer leakage fault. Specifically, when the gas has nozzle inner leakage fault, a catalyst protection strategy is executed, namely the three-way catalyst is considered to have certain cracking risk, so that the three-way catalyst is executed to protect related actions; and when the gas leakage fault exists, executing a vehicle safety protection strategy, namely considering that certain influence exists on the vehicle driving safety, and executing vehicle safety related protection measures.

It should be noted that, both the catalyst protection strategy and the vehicle safety protection strategy can be implemented by using the prior art, and the embodiment is not described herein again, and the advantage of the embodiment is that the embodiment can execute different fault actions according to different gas leakage faults, so as to reasonably implement protection on the engine and the aftertreatment system.

According to the technical scheme of the embodiment of the invention, after an engine ECU is electrified, whether a gas leakage fault exists when the engine is not started is judged, and the engine is controlled to be started after the gas leakage fault is detected; after the engine is in a running state, if the engine is in a fuel cut-off state and the duration of the fuel cut-off state of the engine exceeds a state duration threshold, reading the current oxygen concentration value of an oxygen sensor in front of the engine; and determining that the gas has nozzle inner leakage fault or gas outer leakage fault according to the current oxygen concentration value. The invention solves the problem that the prior art can not distinguish whether the gas leakage is the leakage in the nozzle or the leakage of the gas pipeline to the atmosphere, realizes the accurate judgment of the gas leakage direction, executes different fault actions according to different leakage faults and reasonably implements the maintenance and protection of the gas system.

Example two

Fig. 3 is a flowchart of a gas leakage detection method according to a second embodiment of the present invention, and this embodiment provides an optional implementation manner based on the above embodiments. As shown in fig. 3, the gas leakage detection method includes:

and S310, electrifying the engine ECU.

S320, judging whether a gas leakage fault exists when the engine is not started, if so, executing a step S330, and if not, executing a step S340.

And S330, controlling the engine to start and executing the step S350.

And S340, judging whether the engine has gas leakage faults or not, if so, executing the step S330, and if not, executing the step S341.

S341 controls the engine to start, and step S342 is executed.

And S342, judging whether the engine rotating speed is less than a set rotating speed threshold value or not, or receiving a power-off command, if so, executing a step S343, and if not, executing the step S342.

The set rotation speed threshold may be selected and set by a person skilled in the art according to actual conditions, and this embodiment does not limit this.

The power-off command can be sent to the engine ECU by the vehicle controller or other controllers of the vehicle, and is used for controlling the power-off of the engine ECU.

And S343, activating a fuel gas leakage power-off detection function, controlling the power-off of the engine ECU, and executing the step S310.

It is understood that the gas leakage power-off detection function is gas leakage fault detection for gas leakage when the engine ECU is powered off, and a result of detecting whether a gas leakage fault exists may be used in step S320, that is, a gas leakage fault detection result is obtained after the engine ECU is powered on next time.

Specifically, after the engine ECU is powered on at step S310, step S320 is performed to detect whether there is a gas leakage failure while the engine is not started. If the gas leakage fault is detected in the step S343, the step S320 may determine that the gas leakage fault is detected, and similarly, if the gas leakage fault is detected in the step S343, the step S320 determines that the gas leakage fault is not detected.

And S350, judging whether the engine is in a fuel cut-off state or not, and judging whether the duration time of the engine in the fuel cut-off state exceeds a state duration time threshold or not, if so, executing a step S360, and if not, executing a step S370.

And S360, reading the current oxygen concentration value of the engine front oxygen sensor, and executing the step S380.

And S370, continuously monitoring the running state of the engine.

And S380, judging whether the current oxygen concentration value is larger than a set oxygen concentration threshold value, if so, executing a step S381, otherwise, executing a step S382.

And S381, determining that the gas has nozzle internal leakage fault, and executing a catalyst protection strategy.

And S382, determining that the gas leakage fault exists in the gas, and executing a vehicle safety protection strategy.

EXAMPLE III

Fig. 4 is a schematic structural diagram of a gas leakage detection device provided in the third embodiment of the present invention.

As shown in fig. 4, the gas leakage detection device includes:

the engine start-up detection module 410 is used for judging whether a gas leakage fault exists when the engine is not started or not after the engine ECU is powered on, and controlling the engine to start after the gas leakage fault exists;

an oxygen concentration value obtaining module 420, configured to read a current oxygen concentration value of an oxygen sensor before the engine if the engine is in a fuel cut state and a duration of the fuel cut state of the engine exceeds a state duration threshold after the engine is in a running state;

and a leakage direction determining module 430, configured to determine that a nozzle internal leakage fault or a gas external leakage fault exists in the gas according to the current oxygen concentration value.

Optionally, the gas leakage detection device further comprises:

if no gas leakage fault is detected, the gas leakage fault is judged after the engine ECU is electrified.

Optionally, the gas leakage detection device further comprises:

the fuel gas leakage fault control module is used for executing that if the fuel gas leakage fault exists after the ECU of the engine is electrified, the engine is controlled to start, whether the engine is in the fuel cut-off state or not is judged, and whether the duration time of the fuel cut-off state of the engine exceeds a state duration time threshold or not is judged;

the control module without the gas leakage fault is used for judging the gas leakage fault firstly if the gas leakage fault does not exist after the engine ECU is electrified, executing action according to the control module with the gas leakage fault if the gas leakage fault is detected, controlling the engine to start if the gas leakage fault is detected, and activating a gas leakage power-down detection function to control the power-down of the engine ECU when the rotating speed of the engine is smaller than a set rotating speed threshold value or a power-down instruction is received.

Optionally, the leakage direction determining module 430 includes:

the nozzle internal leakage fault determining unit is used for determining that the gas has nozzle internal leakage fault if the current oxygen concentration value is greater than a set oxygen concentration threshold value;

and the gas leakage fault determining unit is used for determining that a gas leakage fault exists if the current oxygen concentration value is less than or equal to a set oxygen concentration threshold value.

Optionally, the gas leakage detection device further comprises:

the nozzle internal leakage fault processing module is used for executing a catalyst protection strategy when the gas has nozzle internal leakage fault;

and the gas leakage fault processing module is used for executing a vehicle safety protection strategy when a gas leakage fault exists.

The gas leakage detection device provided by the embodiment of the invention can execute the gas leakage detection method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects for executing the gas leakage detection method.

Example four

FIG. 5 illustrates a schematic structural diagram of a vehicle 510 that may be used to implement an embodiment of the present invention. Vehicles include computers intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. As shown in fig. 5, the vehicle 510 includes at least one processor 511, and a memory communicatively connected to the at least one processor 511, such as a Read Only Memory (ROM) 512, a Random Access Memory (RAM) 513, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 511 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 512 or the computer program loaded from a storage unit 518 into the Random Access Memory (RAM) 513. In the RAM 513, various programs and data required for the operation of the vehicle 510 can also be stored. The processor 511, the ROM 512, and the RAM 513 are connected to each other by a bus 514. An input/output (I/O) interface 515 is also connected to bus 514.

Various components in the vehicle 510 are connected to the I/O interface 515, including: an input unit 516 such as a keyboard, a mouse, or the like; an output unit 517 such as various types of displays, speakers, and the like; a storage unit 518, such as a magnetic disk, optical disk, or the like; and a communication unit 519 such as a network card, modem, wireless communication transceiver, or the like. The communication unit 519 allows the vehicle 510 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunications networks.

Processor 511 may be a variety of general and/or special purpose processing components with processing and computing capabilities. Some examples of processor 511 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, or the like. Processor 511 performs the various methods and processes described above, such as a gas leak detection method.

In some embodiments, the gas leak detection method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 518. In some embodiments, some or all of the computer program may be loaded and/or installed onto the vehicle 510 via the ROM 512 and/or the communication unit 519. When the computer program is loaded into RAM 513 and executed by processor 511, one or more steps of the gas leak detection method described above may be performed. Alternatively, in other embodiments, processor 511 may be configured to perform the gas leak detection method by any other suitable means (e.g., by way of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

Computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described herein may be implemented on a vehicle having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user may provide input to the vehicle. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.

The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas leak detection method, comprising:

2. The gas leak detection method according to claim 1, further comprising, after the determining whether the gas leak failure is detected while the engine is not started, the step of:

3. The gas leak detection method according to claim 2, further comprising:

4. The gas leakage detection method according to claim 2, wherein the gas leakage failure judgment is performed after the engine ECU is powered on, and includes:

after an engine ECU is powered on, detecting a gas pressure drop value of a pipeline between a gas cut-off valve and a gas injection valve, and judging whether a gas leakage fault exists according to the gas pressure drop value.

5. The gas leakage detection method according to claim 1, wherein the determining that there is a nozzle internal leakage fault or a gas external leakage fault in the gas according to the current oxygen concentration value comprises:

6. The gas leak detection method according to claim 5, further comprising:

7. The gas leak detection method according to claim 1, further comprising, after the engine is in an operating state:

8. A gas leakage detection device, comprising:

and the leakage direction determining module is used for determining that the gas has nozzle inner leakage fault or gas outer leakage fault according to the current oxygen concentration value.

9. A vehicle, characterized in that the vehicle comprises:

at least one processor; and

the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the gas leak detection method of any one of claims 1-7.

10. A computer-readable storage medium storing computer instructions for causing a processor to perform the gas leak detection method of any one of claims 1-7 when executed.