CN210894549U - Test system for simulating anti-backfire capability of throttle valve - Google Patents
Test system for simulating anti-backfire capability of throttle valve Download PDFInfo
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- CN210894549U CN210894549U CN201921760066.5U CN201921760066U CN210894549U CN 210894549 U CN210894549 U CN 210894549U CN 201921760066 U CN201921760066 U CN 201921760066U CN 210894549 U CN210894549 U CN 210894549U
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Abstract
The utility model 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 the test tube seat is provided with an electronic throttle valve and a combustion parameter detection device, the combustion tank is also provided with a gas supply device and an ignition device, and the combustion parameter detection device, the gas supply device and the ignition device are respectively connected with the control unit ECU, thereby improving the market competitiveness and the customer satisfaction of the engine.
Description
Technical Field
The utility model relates to an engine control technical field especially relates to a test system of anti-backfire ability of simulation air throttle.
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.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a can effectively verify the anti-backfire failure capability of electronic throttle under different temperature, pressure condition is provided to in the preferred use in multiple electronic throttle product, reduce because of the electronic throttle inefficacy causes the anti-backfire capability's of simulation throttle of engine fault probability test system.
In order to solve the technical problem, the technical scheme of the utility model is that: 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.
Since the technical scheme is used, the utility model discloses following beneficial effect has: through the utility model discloses a concrete structure and method can realize different temperatures, under the pressure condition, the anti-backfire ability of electronic throttle detects, detect before the electronic throttle is not installed on gas engine, so that can be preferred in a plurality of electronic throttle products and use, the problem that the electronic throttle can't detect in advance before the installation is used has been solved, still improve the quality of chooseing for use of electronic throttle effectively, thereby reduce the engine fault rate that causes because of anti-backfire ability inefficacy after the electronic throttle installation, and then promoted engine market competition and customer satisfaction.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the 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 explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the 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.
Through the utility model discloses a concrete structure and method can realize different temperatures, under the pressure condition, the anti-backfire ability of electronic throttle 4 detects, detect before electronic throttle 4 does not install gas engine, so that can be preferred and use in a plurality of electronic throttle 4 products, the problem that electronic throttle 4 can't detect in advance before the installation is used has been solved, still improve electronic throttle 4's quality of chooseing for use effectively, thereby reduce the engine fault rate that electronic throttle 4 installed back caused because of anti-backfire ability inefficacy, and then engine market competition and customer satisfaction have been promoted.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921760066.5U CN210894549U (en) | 2019-10-17 | 2019-10-17 | Test system for simulating anti-backfire capability of throttle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921760066.5U CN210894549U (en) | 2019-10-17 | 2019-10-17 | Test system for simulating anti-backfire capability of throttle valve |
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| CN210894549U true CN210894549U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921760066.5U Active CN210894549U (en) | 2019-10-17 | 2019-10-17 | Test system for simulating anti-backfire capability of throttle valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632430A (en) * | 2019-10-17 | 2019-12-31 | 潍柴西港新能源动力有限公司 | Test system and test method for simulating anti-backfire capability of throttle valve |
| 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 |
-
2019
- 2019-10-17 CN CN201921760066.5U patent/CN210894549U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632430A (en) * | 2019-10-17 | 2019-12-31 | 潍柴西港新能源动力有限公司 | Test system and test method for simulating anti-backfire capability of throttle valve |
| 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 |
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