Gas fuel pressure regulator diagnosis system and diagnosis control method

Abstract

The invention relates to the technical field of pressure regulator diagnosis, in particular to a gas fuel pressure regulator diagnosis system and a diagnosis control method, comprising a control module, a diagnosis module, an electromagnetic valve, a high pressure sensor, a low pressure sensor and a pressure regulator; the electromagnetic valve, the high-pressure pressure sensor, the pressure regulator and the low-pressure pressure sensor are sequentially connected through a pipeline; the control module is electrically connected with the diagnosis module, the electromagnetic valve, the high-pressure pressure sensor, the low-pressure pressure sensor and the pressure regulator. The high-pressure pressure sensor is used for measuring a pressure value corresponding to high-pressure gas in a pipeline between the electromagnetic valve and the pressure regulator; and the low-pressure pressure sensor is used for measuring the pressure value corresponding to the low-pressure gas corresponding to the outlet of the corresponding pressure regulator after passing through the pressure regulator.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure regulator diagnosis, and in particular to a gas fuel pressure regulator diagnosis system and a diagnosis control method. Background Art

[0002] As the world pays more and more attention to environmental protection and energy efficiency, gas fuel vehicles, as green alternatives to traditional fuel vehicles, are gradually becoming an important development direction of the automotive industry. In these new vehicles, the pressure regulator is one of the key components, responsible for adjusting the gas in the high-pressure gas cylinder to a pressure level suitable for engine combustion. Its performance is directly related to the safety, emission level and fuel economy of the vehicle.

[0003] Existing gas fuel pressure regulators usually rely on mechanical structures to achieve pressure regulation, and their built-in diagnostic mechanisms are relatively simple and cannot complete comprehensive fault detection in a short period of time. This delay may result in problems not being discovered in time, increasing safety risks. As a result, existing diagnostic methods can often only identify obvious hardware failures, and it is difficult to make accurate judgments on subtle changes in the working status or potential problems inside the pressure regulator, resulting in inefficient troubleshooting.

[0004] Based on this, there is an urgent need for a gas fuel pressure regulator diagnostic system and diagnostic control method, which can detect hardware faults of the pressure regulator while detecting faults in the operating state of the pressure regulator, thereby achieving comprehensive and rapid fault diagnosis of the pressure regulator. Summary of the invention

[0005] One of the purposes of the present invention is to provide a gas fuel pressure regulator diagnostic system and diagnostic control method, which can detect hardware faults of the pressure regulator while detecting faults in the operating state of the pressure regulator, thereby achieving comprehensive and rapid fault diagnosis of the pressure regulator.

[0006] In order to achieve the above-mentioned object, a gas fuel pressure regulator diagnostic system is provided, including a control module, a diagnostic module, a solenoid valve, a high-pressure pressure sensor, a low-pressure pressure sensor, and a pressure regulator;

[0007] The solenoid valve, high-pressure pressure sensor, pressure regulator and low-pressure pressure sensor are connected in sequence through pipelines; the control module is electrically connected to the diagnosis module, the solenoid valve, the high-pressure pressure sensor, the low-pressure pressure sensor and the pressure regulator respectively;

[0008] The high-pressure pressure sensor is used to measure the pressure value corresponding to the high-pressure gas in the pipeline between the solenoid valve and the pressure regulator;

[0009] The low-pressure pressure sensor is used to measure the pressure value corresponding to the low-pressure gas at the outlet of the pressure regulator after passing through the pressure regulator;

[0010] The diagnostic module is used to perform hardware fault detection on the solenoid valve, the high-pressure pressure sensor, the low-pressure pressure sensor, and the voltage regulator when the solenoid valve is in a closed state, and determine whether the corresponding equipment has a fault. If so, output the first fault information, if not, output the first safety information;

[0011] The control module is used to start the solenoid valve when outputting the corresponding first safety information. At this time, the solenoid valve is in an open state. Based on a preset fault diagnosis strategy, the control module collects the pressure value corresponding to the high-pressure pressure sensor and the pressure value corresponding to the low-pressure pressure sensor at this time, performs fault detection on the pressure regulator, and generates corresponding second fault information.

[0012] Technical principle and effect of this solution: In this solution, the high-pressure gas in the pipeline passes through the solenoid valve, high-pressure pressure sensor, pressure regulator and low-pressure pressure sensor in sequence. The control module, as the control core of the entire system, is responsible for receiving the data collected by each sensor and controlling the opening and closing of the solenoid valve. The high-pressure pressure sensor is set on the pipeline between the solenoid valve and the pressure regulator to realize the pressure value of the high-pressure gas that has not been pressure-regulated, while the low-pressure pressure sensor is set at the outlet of the pressure regulator to monitor the pressure value of the low-pressure gas after pressure regulation.

[0013] After the entire system is powered on, the control module first starts the diagnostic module. When the solenoid valve is closed, the control module performs hardware fault detection on the solenoid valve, high-pressure pressure sensor, low-pressure pressure sensor, and voltage regulator to determine whether the corresponding equipment has a fault. If so, the first fault information is output; if not, the first safety information is output. It also determines whether there is an open circuit, a short to ground fault, or a short to electricity fault. When the first fault information is output, the operator will repair and replace the corresponding equipment until there is no fault. After the first safety information is output, it means that the corresponding equipment hardware has no fault.

[0014] The control module then starts the solenoid valve, and the high-pressure gas will flow out from the outlet of the pressure regulating valve through the pipeline. In this process, based on the preset fault diagnosis strategy, the pressure value corresponding to the high-pressure pressure sensor and the pressure value corresponding to the low-pressure pressure sensor are collected, and the fault detection and diagnosis of the pressure regulator are completed, thereby outputting the second fault information, thereby achieving accurate and rapid diagnosis of the gas fuel pressure regulator fault.

[0015] In this solution, the control module and the diagnostic module are set up to perform hardware detection on all key components (such as solenoid valves, high-pressure pressure sensors, low-pressure pressure sensors, voltage regulators, etc.) at the initial start-up of the system (when the solenoid valve is closed), so that potential faults can be discovered before the problem affects normal operation. This preventive maintenance measure can effectively avoid safety accidents caused by equipment failure. Once it is confirmed that the hardware is fault-free and enters the operating mode, the system will continuously monitor the working status of the voltage regulator to ensure that it always works stably according to the preset parameters. If an abnormal situation occurs, quick action can be taken to ensure the safety and reliability of the system.

[0016] The entire fault detection process is divided into two stages, the first is the hardware integrity check under static conditions, and the second is the performance evaluation under dynamic conditions. This design allows each stage to focus on a specific type of fault, thereby improving the accuracy and credibility of the diagnostic results. It not only relies on the data of a single sensor, but also combines the information provided by multiple sensors (such as high-pressure sensors and low-pressure sensors) for comprehensive analysis. This helps to understand the system behavior more comprehensively, reduce the false alarm rate, and locate the source of the fault more accurately. That is, it can realize the detection of hardware faults of the voltage regulator while realizing the fault detection of the voltage regulator in the operating state, thereby realizing comprehensive and rapid fault diagnosis of the voltage regulator.

[0017] Furthermore, the high-pressure gas in the pipeline includes one of natural gas, hydrogen and ammonia, or a mixed gas formed by mixing at least two of the above gases in any proportion.

[0018] Beneficial effects: In this solution, the high-pressure gas in the pipeline is set to multiple types, so that the system can handle multiple types of gas fuels and support any proportion of mixing between these gases. This multi-fuel compatibility allows the system to flexibly respond to different application scenarios and demand changes, whether it is a single fuel or a mixed fuel environment.

[0019] Furthermore, the voltage regulator includes a mechanical voltage regulator or an electronically controlled voltage regulator.

[0020] Beneficial effects: Two different voltage regulation schemes, mechanical voltage regulator and electronically controlled voltage regulator, are provided, so that the system can flexibly select the most appropriate voltage regulation method according to actual application requirements, cost considerations or environmental conditions.

[0021] Furthermore, the diagnostic module is also used to collect the pressure value P corresponding to the high pressure sensor when the solenoid valve is in the closed state. H 1 and the pressure value P corresponding to the low pressure sensor at this time L 1, and judge P H 1 and P L1 Is it within the preset reasonable range? If so, the corresponding sensor is not faulty; if not, the corresponding sensor is faulty.

[0022] Beneficial effects: By monitoring the pressure under static conditions at the initial startup of the system or in a non-operating state, potential faults can be discovered before the problem affects normal operation. This preventive maintenance measure can effectively avoid safety accidents or performance degradation caused by sensor failure. By collecting the pressure values ​​of high-pressure and low-pressure pressure sensors when the solenoid valve is closed and judging their rationality, the system reliability and safety are enhanced, and the precision and accuracy of diagnosis are greatly improved, providing users with a more intelligent, reliable and efficient solution. This mechanism ensures that the system is built on a stable and accurate foundation from the beginning, providing a solid guarantee for subsequent operations.

[0023] Furthermore, the preset fault diagnosis strategy is:

[0024] Determine whether the voltage regulator is a mechanical voltage regulator or an electronically controlled voltage regulator;

[0025] When the pressure regulator is a mechanical pressure regulator, read the pressure value PH2 corresponding to the high pressure sensor and the pressure value P corresponding to the low pressure sensor. L 2;

[0026] When P H 2 <P H 1 and |P H 2-P H 1| <Y H 1, it is judged that the solenoid valve has a fault and cannot be opened; otherwise, it is judged that the solenoid valve has no fault and can be opened normally. L 2>P L 1 and |P L 2-P L 1|<Y L 1a, or P L 2≥Y L 1b, it is determined that the mechanical voltage regulator has a fault, and the corresponding second fault information is output;

[0027] When the voltage regulator is an electronically controlled voltage regulator, the electronically controlled voltage regulator is started by the control module, and the pressure value P corresponding to the high pressure sensor is read. H 3, and the pressure value P corresponding to the low pressure sensor L 3;

[0028] When P H 3<P H 1 and |P H 3-P H 1| <Y H2, it is judged that the solenoid valve has a fault and cannot be opened; otherwise, it is judged that the solenoid valve has no fault and can be opened normally. At this time, if P L 3>P L 1 and |P L 3-P L 1|<Y L 2a, or P L 3≥Y L 2b, it is determined that the electronically controlled voltage regulator has a fault, and the corresponding second fault information is output.

[0029] Beneficial effects: Different startup methods and detection standards are used for different types of voltage regulators (mechanical voltage regulators and electronically controlled voltage regulators). This customized diagnostic logic can more accurately reflect the working status of each voltage regulator, avoiding the misjudgment that may be caused by general methods. By reading the pressure values ​​of high-pressure and low-pressure pressure sensors under actual working conditions and comparing them with the baseline values ​​under initial static conditions, the functional status of the voltage regulator and solenoid valve can be more realistically evaluated, improving the credibility of the diagnostic results.

[0030] Furthermore, it also includes a maintenance module, which is used to formulate a corresponding fault maintenance plan according to the output first fault information or second fault information.

[0031] Beneficial effect: In this solution, the fault repair plan is formulated as soon as the fault information is output, which can quickly provide maintenance personnel with maintenance directions and greatly improve maintenance efficiency.

[0032] The present invention also provides a gas fuel pressure regulator diagnosis and control method, using the above-mentioned gas fuel pressure regulator diagnosis system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a logic block diagram of the gas fuel pressure regulator diagnostic system and diagnostic control method in the first embodiment of the present invention.

[0034] Figure 2 This is a pipeline connection structure diagram corresponding to the voltage regulator being an electronically controlled voltage regulator in the first embodiment of the present invention;

[0035] Figure 3 This is a pipeline connection structure diagram corresponding to the pressure regulator being a mechanical pressure regulator in the first embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following is further described in detail through specific implementation methods:

[0037] The symbols in the drawings of the specification include: pipeline 1, solenoid valve 2, high-pressure pressure sensor 3, electronically controlled pressure regulator 4, low-pressure pressure sensor 5, and mechanical pressure regulator 6.

[0038] Embodiment 1

[0039] Gas fuel pressure regulator diagnostic system, basically like Figure 1 As shown, it includes a control module, a diagnostic module, a solenoid valve 2, a high-pressure pressure sensor 3, a low-pressure pressure sensor 5, and a pressure regulator;

[0040] The solenoid valve 2, the high-pressure pressure sensor 3, the pressure regulator and the low-pressure pressure sensor 5 are connected in sequence through the pipeline 1; the control module is electrically connected to the diagnostic module, the solenoid valve 2, the high-pressure pressure sensor 3, the low-pressure pressure sensor 5 and the pressure regulator respectively; in this embodiment, the high-pressure pressure sensor 3 and the low-pressure pressure sensor 5 are also integrated with corresponding temperature sensors, so as to realize dual detection of the temperature and pressure of the gas in the pipeline 1.

[0041] The high-pressure pressure sensor 3 is used to measure the pressure value corresponding to the high-pressure gas in the pipeline 1 between the solenoid valve 2 and the pressure regulator; the high-pressure gas in the pipeline 1 includes one of natural gas, hydrogen and ammonia, or a mixed gas formed by mixing at least two of the above gases in any proportion.

[0042] The low-pressure pressure sensor 5 is used to measure the pressure value of the low-pressure gas at the outlet of the pressure regulator after passing through the pressure regulator; the pressure regulator includes a mechanical pressure regulator 6 or an electronically controlled pressure regulator 4.

[0043] The diagnostic module is used to perform hardware fault detection on the solenoid valve 2, the high-pressure pressure sensor 3, the low-pressure pressure sensor 5, and the voltage regulator when the solenoid valve 2 is in the closed state, and determine whether the corresponding equipment has a fault. If so, output the first fault information, if not, output the first safety information;

[0044] The diagnostic module is also used to collect the pressure value P corresponding to the high pressure sensor 3 when the solenoid valve 2 is in the closed state. H 1 and the pressure value P corresponding to the low pressure sensor 5 at this time L 1, and judge P H 1 and P L 1 Is it within the preset reasonable range? If so, the corresponding sensor is not faulty; if not, the corresponding sensor is faulty.

[0045] The control module is used to start the solenoid valve 2 when outputting the corresponding first safety information. At this time, the solenoid valve 2 is in an open state. Based on the preset fault diagnosis strategy, the control module collects the pressure value corresponding to the high-pressure pressure sensor 3 and the pressure value corresponding to the low-pressure pressure sensor 5 at this time, performs fault detection on the pressure regulator, and generates corresponding second fault information.

[0046] The preset fault diagnosis strategy is:

[0047] Open the solenoid valve 2 through the control module to determine whether the voltage regulator is a mechanical voltage regulator 6 or an electronically controlled voltage regulator 4;

[0048] like Figure 2 As shown, when the pressure regulator is a mechanical pressure regulator 6, the pressure value P corresponding to the high pressure sensor 3 is read. H 2, and the pressure value P corresponding to the low pressure sensor 5 L 2;

[0049] When P H 2<P H 1 and |P H 2-P H 1| <Y H 1, it is judged that the solenoid valve 2 has a fault and cannot be opened; otherwise, it is judged that the solenoid valve 2 has no fault and can be opened normally. L 2>P L 1 and |P L 2-P L 1|<Y L 1a, or P L 2≥Y L 1b, it is determined that the mechanical voltage regulator 6 has a fault, and the corresponding second fault information is output;

[0050] like Figure 3 As shown, when the voltage regulator is the electronically controlled voltage regulator 4, the electronically controlled voltage regulator 4 is started by the control module, and the pressure value P corresponding to the high pressure sensor 3 is read. H 3, and the pressure value P corresponding to the low pressure sensor 5 L 3;

[0051] When P H 3<P H 1 and |P H 3-P H 1| <Y H 2, it is judged that the solenoid valve 2 has a fault and cannot be opened; otherwise, it is judged that the solenoid valve 2 has no fault and can be opened normally. L 3>P L 1 and |P L 3-P L 1|<Y L 2a, or P L 3≥Y L 2b, it is determined that the electronically controlled voltage regulator 6 has a fault, and the corresponding second fault information is output. H 1. Y H 2 are respectively the first high pressure threshold and the second high pressure threshold corresponding to the high pressure sensor 3, Y L 1a, Y L1b is the first low pressure threshold and the second low pressure threshold corresponding to the low pressure sensor 5, Y L 2a, Y L 2b is the third low-pressure threshold and the fourth low-pressure threshold corresponding to the low-pressure pressure sensor 5.

[0052] It also includes a maintenance module, which is used to formulate a corresponding fault maintenance plan according to the output first fault information or second fault information.

[0053] First, the control module is powered on, and then the control module reads the pressure values ​​corresponding to the high-pressure pressure sensor 3 and the low-pressure pressure sensor 5 at this time, and the diagnostic module determines whether the solenoid valve 2, the pressure regulator and the pressure sensor have open circuit, short to electricity, or short to ground faults. At the same time, the pressure values ​​corresponding to the two sensors are judged based on the read pressure values ​​to see whether they are within a reasonable range. If they are too large or too small, it indicates that the pressure sensor is faulty. Once any of the above devices fails, the first fault information will be output through the diagnostic module. If there are no problems, the first safety information will be output.

[0054] After outputting the first safety information, the solenoid valve 2 is opened through the control module, and the pressure values ​​corresponding to the high-pressure pressure sensor 3 and the low-pressure pressure sensor 5 are read, and then the corresponding fault diagnosis strategy is executed. Of course, in this embodiment, when the corresponding voltage regulator is the electronically controlled voltage regulator 4, the circuit fault of the voltage regulator will be diagnosed first to determine whether the corresponding electronically controlled voltage regulator 4 has a hardware fault. If so, the third fault information is output. If not, the electronically controlled voltage regulator 4 is driven, and then the subsequent pressure value reading and judgment are continued, thereby achieving accurate and comprehensive diagnosis of the fault of the electronically controlled voltage regulator 4.

[0055] This embodiment also discloses a gas fuel pressure regulator diagnosis and control method, which uses the above-mentioned gas fuel pressure regulator diagnosis system.

[0056] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is described too much here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can know all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A gas fuel pressure regulator diagnostic system, characterized in that: Including control module, diagnostic module, solenoid valve, high pressure sensor, low pressure sensor, and pressure regulator; The solenoid valve, high-pressure pressure sensor, pressure regulator and low-pressure pressure sensor are connected in sequence through pipelines; the control module is electrically connected to the diagnosis module, the solenoid valve, the high-pressure pressure sensor, the low-pressure pressure sensor and the pressure regulator respectively; The high-pressure pressure sensor is used to measure the pressure value corresponding to the high-pressure gas in the pipeline between the solenoid valve and the pressure regulator; The low-pressure pressure sensor is used to measure the pressure value corresponding to the low-pressure gas at the outlet of the pressure regulator after passing through the pressure regulator; The diagnostic module is used to perform hardware fault detection on the solenoid valve, the high-pressure pressure sensor, the low-pressure pressure sensor, and the voltage regulator when the solenoid valve is in a closed state, and determine whether the corresponding equipment has a fault. If so, output the first fault information, if not, output the first safety information; The control module is used to start the solenoid valve when outputting the corresponding first safety information. At this time, the solenoid valve is in an open state. Based on a preset fault diagnosis strategy, the control module collects the pressure value corresponding to the high-pressure pressure sensor and the pressure value corresponding to the low-pressure pressure sensor at this time, performs fault detection on the pressure regulator, and generates corresponding second fault information.

2. The gas fuel pressure regulator diagnostic system according to claim 1, characterized in that: The high-pressure gas in the pipeline includes one of natural gas, hydrogen and ammonia, or a mixed gas formed by mixing at least two of the above gases in any proportion.

3. The gas fuel pressure regulator diagnostic system according to claim 2, characterized in that: The voltage regulator includes a mechanical voltage regulator or an electronically controlled voltage regulator.

4. The gas fuel pressure regulator diagnostic system according to claim 3, characterized in that: The diagnostic module is also used to collect the pressure value P corresponding to the high pressure sensor when the solenoid valve is in the closed state. H 1 and the pressure value P corresponding to the low pressure sensor at this time L 1, and judge P H 1 and P L 1 Is it within the preset reasonable range? If so, the corresponding sensor is not faulty; if not, the corresponding sensor is faulty.

5. The gas fuel pressure regulator diagnostic system according to claim 4, characterized in that: The preset fault diagnosis strategy is: Determine whether the voltage regulator is a mechanical voltage regulator or an electronically controlled voltage regulator; When the voltage regulator is a mechanical voltage regulator, read the pressure value P corresponding to the high pressure sensor at this time. H 2, and the pressure value P corresponding to the low pressure sensor L 2; When P H 2 <P H 1 and |P H 2-P H 1| <Y H 1, it is judged that the solenoid valve has a fault and cannot be opened; otherwise, it is judged that the solenoid valve has no fault and can be opened normally. L 2>P L 1 and |P L 2-P L 1| <Y L 1a, or P L 2≥Y L 1b, it is determined that the mechanical voltage regulator has a fault, and the corresponding second fault information is output; When the voltage regulator is an electronically controlled voltage regulator, the electronically controlled voltage regulator is started by the control module, and the pressure value P corresponding to the high pressure sensor is read. H 3, and the pressure value P corresponding to the low pressure sensor L 3; When P H 3 <P H 1 and |P H 3-P H 1| <Y H 2, it is judged that the solenoid valve has a fault and cannot be opened; otherwise, it is judged that the solenoid valve has no fault and can be opened normally. At this time, if P L 3>P L 1 and |P L 3-P L 1| <Y L 2a, or P L 3≥Y L 2b, it is determined that the electronically controlled voltage regulator has a fault, and the corresponding second fault information is output.

6. The gas fuel pressure regulator diagnostic system according to claim 5, characterized in that: It also includes a maintenance module, which is used to formulate a corresponding fault maintenance plan according to the output first fault information or second fault information.

7. A gas fuel pressure regulator diagnosis control method, characterized in that: Use of the gas fuel pressure regulator diagnostic system according to any one of claims 1 to 6 above.

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