CN110632430A - Test system and test method for simulating anti-backfire capability of throttle valve - Google Patents
Test system and test method for simulating anti-backfire capability of throttle valve Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims abstract description 166
- 238000001514 detection method Methods 0.000 claims abstract description 48
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 48
- 239000007789 gas Substances 0.000 claims description 41
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 239000003345 natural gas Substances 0.000 claims description 24
- 239000000446 fuel Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000005496 tempering Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims 2
- 239000002912 waste gas Substances 0.000 claims 1
- 239000007921 spray Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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Abstract
The invention discloses a test system for simulating the anti-backfire capability of a throttle valve, which comprises a control unit ECU, a combustion tank and a test tube seat, wherein an electronic throttle valve and a combustion parameter detection device are installed on the test tube seat, a gas supply device and an ignition device are also installed on the combustion tank, and the combustion parameter detection device, the gas supply device and the ignition device are respectively connected to the control unit ECU, and a test method of the test system is also disclosed. Thereby improving the market competitiveness and the customer satisfaction of the engine.
Description
Technical Field
The invention relates to a test system for simulating the anti-backfire capability of a throttle valve and a specific test method of the test system.
Background
Each cylinder of the engine is generally provided with at least two valves, namely an intake valve and an exhaust valve, and the working environment of the valves is relatively severe. Firstly, the valve is directly contacted with high-temperature fuel gas, and is heated seriously and difficult to dissipate heat, so that the temperature of the valve is extremely high; secondly, the valve bears the action of gas force and valve spring force, and the seat ring is impacted greatly when the valve is seated due to the inertia force of the moving part of the valve mechanism; moreover, the lubricating condition of the valve is poor, and the valve performs high-speed reciprocating motion in the valve guide pipe at a very high opening and closing speed, so that the abrasion speed is high; finally, the valve is susceptible to corrosion due to contact with corrosive gases in the high temperature combustion gases. Based on the reasons, after the natural gas engine for the vehicle runs for a long time, the abrasion phenomenon of the valve and the seat ring is easy to occur, when the abrasion amount is large, the inlet valve is not tightly sealed, at the moment, when the engine is ignited, mixed gas in the air inlet pipe is ignited at the same time, the temperature in the air inlet pipe is rapidly increased, the air throttle is bent and failed under the impact of airflow, and the strength of the valve plate and the shaft of the air throttle on the air inlet pipe is also greatly reduced in the high-temperature tempering effect. Therefore, it is necessary to design a system capable of detecting the anti-backfire capability of the throttle valve, so as to preferably use the throttle valve, and avoid the influence of the anti-backfire capability on the throttle valve after being installed and used, and influence the normal operation of the engine.
Disclosure of Invention
The invention aims to provide a test system for simulating the anti-backfire capability of an electronic throttle valve, which can effectively verify the anti-backfire failure capability of the electronic throttle valve under different temperature and pressure conditions so as to be preferentially used in various electronic throttle valve products and reduce the probability of engine failure caused by the failure of the electronic throttle valve.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a test system of anti-backfire ability of simulation air throttle, includes the control unit ECU, still includes the burning jar, sealed intercommunication has the test tube seat on the burning jar, demountable installation has the electronic air throttle on the test tube seat, the electronic air throttle with between the burning jar install burning parameter detection device on the test tube seat, still install gas supply arrangement and ignition on the burning jar, burning parameter detection device the gas supply arrangement with ignition is connected to respectively the control unit ECU.
Preferably, the combustion parameter detecting device includes a temperature sensor for detecting a temperature parameter during combustion of the gas in the combustion tank and a pressure sensor for detecting a pressure parameter during combustion of the gas, and the temperature sensor and the pressure sensor are respectively connected to the control unit ECU.
Preferably, the temperature sensor and the pressure sensor are installed on the test tube seat oppositely.
According to a preferable technical scheme, the fuel gas supply device comprises an air inlet pipe seat, a fan is installed at the end of the air inlet pipe seat, and an air flow meter and a one-way electromagnetic valve are sequentially installed on the air inlet pipe seat along the air advancing direction; the natural gas compressed air source is connected with a jet nozzle through an air supply pipeline, the jet end of the jet nozzle is arranged in the combustion tank, an electronic pressure regulating valve is further installed on the air supply pipeline, and the fan, the air flow meter, the one-way electromagnetic valve, the electronic pressure regulating valve and the jet nozzle are respectively connected to the control unit ECU.
Preferably, the air intake pipe holder and the injection nozzle are provided to face each other on the combustion can.
Preferably, the ignition device comprises an ignition control block connected with the control unit ECU, the ignition control block is electrically connected with an ignition coil, the ignition coil is electrically connected with a spark plug, the spark plug is fixedly mounted on the combustion tank, and an ignition end is arranged in the combustion tank.
The invention also discloses a test method of the test system for simulating the anti-backfire capability of the throttle valve, which comprises the following steps,
presetting a combustion mode of a combustion tank in the control unit ECU, and prestoring an air-fuel ratio corresponding to the combustion mode and combustion parameter calibration values corresponding to each air-fuel ratio;
secondly, controlling the electronic pressure regulating valve to act through the control unit ECU, and adjusting and determining the delivery pressure of the natural gas in the gas supply pipeline at the gas inlet end of the injection nozzle;
thirdly, starting a test through the control unit ECU, controlling the injection nozzle to be opened by the control unit ECU, injecting natural gas into the combustion tank, recording the injection amount, selecting a corresponding air-fuel ratio according to the injection amount of the injection nozzle by the control unit ECU, and then determining the required air amount through the selected air-fuel ratio;
fourthly, the control unit ECU controls the fan and the one-way electromagnetic valve to be opened, air is conveyed into the combustion tank, the air flow meter detects the air feeding amount in real time, and when the air feeding amount reaches the determined required air amount, the control unit ECU controls the fan and the one-way electromagnetic valve to be closed;
fifthly, the control unit ECU controls the ignition system to start to ignite the mixed gas in the combustion tank;
after the combustion process is started, the combustion parameter detection device detects the combustion parameters in the combustion tank in real time, forms a combustion parameter detection value, transmits the combustion parameter detection value to the control unit ECU, compares the combustion parameter detection value with the combustion parameter calibration value, and when the combustion parameter detection value reaches the combustion parameter calibration value, the control unit ECU controls the combustion tank to exhaust;
and observing the state of the electronic throttle valve in the process that the combustion of the combustion tank starts and the combustion parameter detection value reaches the combustion parameter calibration value, and judging whether the anti-backfire capability of the electronic throttle valve is failed.
Preferably, the combustion mode in the first step includes a lean combustion mode and an equivalent combustion mode.
The combustion parameter calibration value in the first step comprises a combustion temperature calibration value and a combustion pressure calibration value; accordingly, in the sixth step, the combustion parameter detection value includes a combustion temperature detection value detected by the temperature sensor and a combustion pressure detection value detected by the pressure sensor.
Preferably, in the sixth step, the control unit ECU controls the exhaust of the combustion tank to be performed in such a manner that the control unit ECU controls the electronic throttle to be opened, and at the same time, the control unit ECU controls the fan and the one-way solenoid valve to be opened, so that the fan feeds air into the combustion tank, and the exhaust gas in the combustion tank is exhausted through the electronic throttle, thereby completing a detection process.
As an improvement to the above technical solution, in the sixth step, the process of determining whether the electronic throttle valve is in a failure of resisting tempering is that when a gap occurs between the electronic throttle valve and the test tube seat or the electronic throttle valve is deformed, it is determined that the electronic throttle valve is in a failure of resisting tempering, otherwise it is determined that the electronic throttle valve is in a valid anti-tempering capability.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the specific structure and the method can realize the anti-backfire capability detection of the electronic throttle valve under different temperature and pressure conditions, and the detection is carried out before the electronic throttle valve is not installed on the gas engine, so that the electronic throttle valve can be preferentially used in a plurality of electronic throttle valve products, the problem that the electronic throttle valve cannot be detected in advance before being installed and used is solved, and the selection quality of the electronic throttle valve is effectively improved, so that the engine failure rate caused by the failure of the anti-backfire capability after the electronic throttle valve is installed is reduced, and the market competitiveness and the customer satisfaction degree of the engine are further improved.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure: 1-a control unit ECU; 2-a combustion tank; 3-test tube seat; 4-electronic throttle valve; 5-a temperature sensor; 6-a pressure sensor; 7-air inlet pipe seat; 8-a fan; 9-an air flow meter; 10-one-way solenoid valve; 11-a spray nozzle; 12-a gas supply line; 13-an electronic pressure regulating valve; 14-an ignition control block; 15-an ignition coil; 16-spark plug.
Detailed Description
The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in FIG. 1, the test system for simulating the anti-backfire capability of the throttle valve comprises a separately arranged control unit ECU1, wherein the control unit ECU1 is a core control component of the whole test system. Still include combustion can 2, combustion can 2 is the sealed jar body, and can be formed by the steel welding, need do withstand voltage test before the use, can satisfy 20 bar's withstand voltage ability can. The combustion can 2 is hermetically communicated with a test tube seat 3, an electronic throttle valve 4 is detachably mounted on the test tube seat 3, a combustion parameter detection device is mounted on the test tube seat 3 between the electronic throttle valve 4 and the combustion can 2, and the combustion parameter detection device is connected to the control unit ECU 1. The electronic throttle 4 is a test object of the test system, and the electronic throttle 4 of different manufacturers and different models can be replaced to be sequentially verified so as to be installed and used preferentially.
The combustion parameter detection device comprises a temperature sensor 5 for detecting temperature parameters in the combustion process of gas in the combustion tank 2 and a pressure sensor 6 for detecting pressure parameters in the combustion process of the gas, wherein the temperature sensor 5 and the pressure sensor 6 are oppositely arranged on the test tube seat 3, the temperature sensor 5 and the pressure sensor 6 are respectively connected to the control unit ECU1, the measurement range of the pressure sensor 6 is 0-20 bar, and the measurement range of the temperature sensor 5 is 0-300 ℃. The temperature sensor 5 and the pressure sensor 6 function to detect in real time the temperature and pressure generated by the combustion in the combustion can 2 in the vicinity of the electronic throttle valve 4 and to transmit signals to the control unit ECU1, and the control unit ECU1 determines whether a required limit value is reached based on a specific detection value to control the opening and closing of the electronic throttle valve 4. The limit value in the control unit ECU1 is a preset value, and can be manually and flexibly adjusted according to the actually detected electronic throttle 4, so as to realize the detection of the anti-backfire capability of the electronic throttle 4 under different temperature and pressure conditions.
The present embodiment further mounts a gas supply device and an ignition device on the combustion can 2, which are respectively connected to the control unit ECU 1. Specifically, the gas supply device comprises an air inlet pipe seat 7, a fan 8 is installed at the end of the air inlet pipe seat 7, an air flow meter 9 and a one-way solenoid valve 10 are sequentially installed on the air inlet pipe seat 7 along the air advancing direction, and the fan 8 and the air flow meter 9 are respectively connected to the control unit ECU 1. The electromagnetic check valve realizes on-off action of fresh air delivery under the control of the control unit ECU 1. The control unit ECU1 controls the on/off of the fan 8 according to a signal fed back by the airflow meter 9. The blower 8 can be a hair drier with an air flow sensor, in this case, the air flow meter 9 can be omitted, and the control unit ECU1 can control the on-off of the hair drier through a signal fed back by the air flow sensor in the hair drier.
The gas supply device also comprises a natural gas compressed gas source, and the natural gas compressed gas source can be selected from a compressed natural gas tank or a natural gas station pipeline. The natural gas compressed air source is connected with a spray nozzle 11 through an air supply pipeline 12, the spray end of the spray nozzle 11 is arranged in the combustion tank 2, an electronic pressure regulating valve 13 is further installed on the air supply pipeline 12, and the one-way electromagnetic valve 10, the electronic pressure regulating valve 13 and the spray nozzle 11 are respectively connected to the control unit ECU 1.
The electronic pressure regulating valve 13 can adjust the pressure of the natural gas entering the combustion tank 2 in real time through the control of the control unit ECU1, and mainly functions to reduce the pressure of the compressed natural gas of the natural gas compressed gas source and control the on-off of the delivery of the compressed natural gas. The injection nozzle 11 can dispersedly inject the natural gas after the pressure of the electronic pressure regulating valve 13 is reduced into the combustion tank 2, and the air inlet pipe seat 7 and the injection nozzle 11 are oppositely arranged on the combustion tank 2, so that the natural gas and the fresh air are uniformly mixed, and the combustion effect is improved.
The ignition device comprises an ignition control block 14 connected with the control unit ECU1, the ignition control block 14 is electrically connected with an ignition coil 15, the ignition coil 15 is electrically connected with an ignition plug 16 through a high-voltage wire, the ignition plug 16 is fixedly installed on the combustion tank 2, and the ignition end is arranged in the combustion tank 2. The ignition coil 15 is used to amplify the 24V voltage obtained by the ignition control block 14 from the control unit ECU1 to obtain ignition energy, and the generated ignition energy is transmitted to the spark plug 16 through a high voltage line to break down the air between the spark plug 16 and ignite the mixed gas in the combustion tank 2, and the specific structure and operation principle thereof are well known to those skilled in the engine technology, and will not be described in detail herein.
The embodiment also discloses a testing method of the testing system for simulating the anti-backfire capability of the throttle valve, which comprises the following steps,
step one, a combustion mode of the combustion canister 2 is preset in the control unit ECU1, and an air-fuel ratio corresponding to the combustion mode and a combustion parameter calibration value corresponding to each air-fuel ratio are prestored. The combustion mode in this step includes a lean combustion mode and an equivalent combustion mode.
The lean combustion is an engine working mode of the engine, the actual air-fuel ratio can reach 1.5 times of the theoretical air-fuel ratio at most, and the improvement of the air-fuel ratio has the technical effects of increasing the amount of air in mixed gas, enabling the combustion to be more sufficient, improving the circulating heat efficiency during the combustion, reducing the gas consumption of the natural gas engine and achieving the purpose of optimizing the emission. The equivalent combustion is a technical means that the air-fuel ratio of the engine is controlled to be close to the stoichiometric ratio, namely the excess air coefficient is equal to 1, when the engine works in a stable working condition, the electric control system detects the air quantity entering a cylinder through an air intake flow sensor, the air-fuel ratio is ensured to be close to the theoretical air-fuel ratio by controlling the pulse width of oil injection or air injection, and meanwhile, the oxygen sensor detects the oxygen concentration in exhaust gas to perform feedback control on the air-fuel ratio to form a closed-loop control system. In this step, the combustion parameter calibration includes a combustion temperature calibration and a combustion pressure calibration.
And step two, the control unit ECU1 controls the electronic pressure regulating valve 13 to act, the delivery pressure of the natural gas in the gas supply pipeline 12 at the gas inlet end of the injection nozzle 11 is adjusted and determined, and the high-pressure natural gas of the natural gas compressed gas source is subjected to pressure reduction treatment, so that the accurate detection of the injection amount is realized.
And step three, starting a test through the control unit ECU1, controlling the injection nozzle 11 to be opened by the control unit ECU1, injecting natural gas into the combustion tank 2, recording the injection amount, selecting a corresponding air-fuel ratio according to the injection amount of the injection nozzle 11 by the control unit ECU1, and determining the required air amount according to the selected air-fuel ratio. The control of the injection nozzles 11 and the acquisition of the injection amount information by the control unit ECU1 are well known to those skilled in the art.
And step four, the control unit ECU1 controls the fan 8 and the one-way electromagnetic valve 10 to be opened, air is conveyed into the combustion tank 2, the air flow meter 9 detects the air feeding amount in real time, and when the air feeding amount reaches the air amount required by determination, the control unit ECU1 controls the fan 8 and the one-way electromagnetic valve 10 to be closed. The natural gas and air are mixed uniformly in the combustion can 2 for ignition.
And step five, the control unit ECU1 controls the ignition system to start, the mixed gas in the combustion tank 2 is ignited, and the mixed gas detonates in the sealed space of the combustion tank 2 to simulate the backfire effect of the engine.
And step six, after the combustion process is started, the combustion parameter detection device detects the combustion parameters in the combustion tank 2 in real time, forms combustion parameter detection values, transmits the combustion parameter detection values to the control unit ECU1, compares the combustion parameter detection values with the combustion parameter calibration values, and when the combustion parameter detection values reach the combustion parameter calibration values, the control unit ECU1 controls the combustion tank 2 to exhaust. The combustion parameter detection value comprises a combustion temperature detection value detected by the temperature sensor 5 and a combustion pressure detection value detected by the pressure sensor 6, namely the combustion temperature detection value is compared with the combustion temperature calibration value, and the combustion pressure detection value is compared with the combustion pressure calibration value.
In the sixth step, the process that the control unit ECU1 controls the exhaust of the combustion tank 2 is that the control unit ECU1 controls the electronic throttle valve 4 to open, and simultaneously the control unit ECU1 controls the fan 8 and the one-way electromagnetic valve 10 to open, so that the fan 8 is used to send air into the combustion tank 2, and the exhaust gas in the combustion tank 2 is exhausted through the electronic throttle valve 4, thereby completing a detection process.
And in the process that the combustion of the combustion tank 2 starts from the combustion parameter detection value to the combustion parameter calibration value, observing the state of the electronic throttle valve 4, and judging whether the anti-backfire capability of the electronic throttle valve 4 is failed. And the process of judging whether the electronic throttle valve 4 is in anti-backfire failure is that when a gap is observed between the electronic throttle valve 4 and the test tube seat 3 or the electronic throttle valve 4 deforms, the electronic throttle valve 4 is judged to be in anti-backfire failure, otherwise, the electronic throttle valve 4 is judged to be in anti-backfire failure.
In this embodiment, in order to improve the precise control of the air amount, a corresponding vacuum-pumping device (including an air-pumping pump, an air-pumping pipeline, etc.) may be disposed on the combustion can 2 and connected to the control unit ECU1, and after the exhaust process of the combustion can 2 is completed, the control unit ECU1 controls the vacuum-pumping device to open, so as to exhaust the residual air used for exhaust from the combustion can 2, so as to achieve the precise proportioning control of the air and the gas in the combustion can 2. In addition, since the air capacity of the combustion can 2 is fixed, it is also possible to calculate an accurate air-fuel ratio taking into account the air capacity of the combustion can 2 when the air-fuel ratio is preset in the control unit ECU 1.
The specific structure and the method can realize the anti-backfire capability detection of the electronic throttle valve 4 under different temperature and pressure conditions, and the detection is carried out before the electronic throttle valve 4 is not installed on the gas engine, so that the electronic throttle valve 4 can be preferentially used in a plurality of electronic throttle valve 4 products, the problem that the electronic throttle valve 4 cannot be detected in advance before being installed and used is solved, the selection quality of the electronic throttle valve 4 is effectively improved, the engine failure rate caused by the failure of the anti-backfire capability after the electronic throttle valve 4 is installed is reduced, and the market competitiveness and the customer satisfaction degree of the engine are further improved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A test system for simulating the anti-backfire capability of a throttle valve comprises a control unit ECU, and is characterized in that: the device comprises a combustion tank, a test tube seat is hermetically communicated on the combustion tank, an electronic throttle valve is detachably mounted on the test tube seat, a combustion parameter detection device is mounted on the test tube seat between the electronic throttle valve and the combustion tank, a gas supply device and an ignition device are further mounted on the combustion tank, and the combustion parameter detection device, the gas supply device and the ignition device are respectively connected to the control unit ECU.
2. The test system for simulating the throttle valve flashback resistance of claim 1, wherein: the combustion parameter detection device comprises a temperature sensor for detecting temperature parameters in the combustion process of gas in the combustion tank and a pressure sensor for detecting pressure parameters in the combustion process of the gas, and the temperature sensor and the pressure sensor are respectively connected to the control unit ECU.
3. The test system for simulating the throttle valve flashback resistance of claim 2, wherein: the temperature sensor and the pressure sensor are oppositely arranged on the test tube seat.
4. The test system for simulating the throttle valve flashback resistance of claim 2, wherein: the gas supply device comprises an air inlet pipe seat, the end part of the air inlet pipe seat is provided with a fan, and an air flow meter and a one-way electromagnetic valve are sequentially arranged on the air inlet pipe seat along the air advancing direction; the natural gas compressed air source is connected with a jet nozzle through an air supply pipeline, the jet end of the jet nozzle is arranged in the combustion tank, an electronic pressure regulating valve is further installed on the air supply pipeline, and the fan, the air flow meter, the one-way electromagnetic valve, the electronic pressure regulating valve and the jet nozzle are respectively connected to the control unit ECU.
5. The test system for simulating the throttle valve flashback resistance of claim 4, wherein: the air inlet pipe seat and the injection nozzle are oppositely arranged on the combustion tank.
6. The test system for simulating the throttle valve flashback resistance of claim 1, wherein: ignition include with the ignition control block that the control unit ECU connects, ignition control block electricity is connected with ignition coil, ignition coil electricity is connected with the spark plug, spark plug fixed mounting in on the combustion can and the ignition end locate in the combustion can.
7. The test method for simulating the test system for the throttle valve flashback resistance, according to claim 4, wherein: comprises the following steps of (a) carrying out,
presetting a combustion mode of a combustion tank in the control unit ECU, and prestoring an air-fuel ratio corresponding to the combustion mode and combustion parameter calibration values corresponding to each air-fuel ratio;
secondly, controlling the electronic pressure regulating valve to act through the control unit ECU, and adjusting and determining the delivery pressure of the natural gas in the gas supply pipeline at the gas inlet end of the injection nozzle;
thirdly, starting a test through the control unit ECU, controlling the injection nozzle to be opened by the control unit ECU, injecting natural gas into the combustion tank, recording the injection amount, selecting a corresponding air-fuel ratio according to the injection amount of the injection nozzle by the control unit ECU, and then determining the required air amount through the selected air-fuel ratio;
fourthly, the control unit ECU controls the fan and the one-way electromagnetic valve to be opened, air is conveyed into the combustion tank, the air flow meter detects the air feeding amount in real time, and when the air feeding amount reaches the determined required air amount, the control unit ECU controls the fan and the one-way electromagnetic valve to be closed;
fifthly, the control unit ECU controls the ignition system to start to ignite the mixed gas in the combustion tank;
after the combustion process is started, the combustion parameter detection device detects the combustion parameters in the combustion tank in real time, forms a combustion parameter detection value, transmits the combustion parameter detection value to the control unit ECU, compares the combustion parameter detection value with the combustion parameter calibration value, and when the combustion parameter detection value reaches the combustion parameter calibration value, the control unit ECU controls the combustion tank to exhaust;
and observing the state of the electronic throttle valve in the process that the combustion of the combustion tank starts and the combustion parameter detection value reaches the combustion parameter calibration value, and judging whether the anti-backfire capability of the electronic throttle valve is failed.
8. The test method for simulating the test system for the throttle valve flashback resistance, according to claim 7, wherein: the combustion mode in the first step comprises a lean combustion mode and an equivalent combustion mode.
The combustion parameter calibration value in the first step comprises a combustion temperature calibration value and a combustion pressure calibration value; accordingly, in the sixth step, the combustion parameter detection value includes a combustion temperature detection value detected by the temperature sensor and a combustion pressure detection value detected by the pressure sensor.
9. The test method for simulating the test system for the throttle valve flashback resistance, according to claim 7, wherein: in the sixth step, the process that the control unit ECU controls the combustion tank to exhaust includes that the control unit ECU controls the electronic throttle valve to open, the control unit ECU controls the fan and the one-way solenoid valve to open, air is sent into the combustion tank by the fan, waste gas in the combustion tank is exhausted through the electronic throttle valve, and a detection process is completed.
10. The test method for simulating the test system for the throttle valve flashback resistance, according to claim 7, wherein: and in the sixth step, the process of judging whether the electronic throttle valve is in anti-tempering failure is that when a gap is formed between the electronic throttle valve and the test tube seat or the electronic throttle valve is deformed, the anti-tempering capability of the electronic throttle valve is judged to be in failure, otherwise, the anti-tempering capability of the electronic throttle valve is judged to be effective.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904137A (en) * | 2021-03-12 | 2021-06-04 | 上汽通用五菱汽车股份有限公司 | Auxiliary device used in ignition system electromagnetic compatibility test process |
| CN113375945A (en) * | 2021-06-18 | 2021-09-10 | 广西玉柴机器股份有限公司 | Simulation engine backfire generating device |
| CN113899545A (en) * | 2021-10-09 | 2022-01-07 | 联合汽车电子（重庆）有限公司 | Electronic throttle valve comprehensive test system and test method |
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