Multipurpose fuel injection performance testing device and testing method

Abstract

The invention discloses a multipurpose fuel injection performance testing device and a testing method, the multipurpose fuel injection performance testing device can be used for testing gas and liquid fuel by an impulse method and a volumetric method, the multipurpose fuel injection performance testing device comprises a volume bomb, and the volume bomb is provided with an external connection structure communicated with the outside; the clamping mechanism is positioned on the containing bomb and is used for clamping and fixing the ejector; the detection component and the adjusting mechanism are located in the containing bomb, the adjusting mechanism is detachably connected in the containing bomb, the detection component is connected with the adjusting mechanism, the adjusting mechanism is used for adjusting the detection component to be centered with the ejector, and the detection component is used for testing the performance of the ejector; the injector can be tested by an impulse method and a volumetric method by matching the detection component with the external structure, so that the injector has multiple purposes, the manufacturing cost can be reduced, the replacement time is saved, the injector can be suitable for testing different gases or liquid fuels, the corrosion of corrosive fuel to the injector can be reduced by arranging the baffle, and the reliability of the injector is improved. The durability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of fuel injection characteristic detection, and in particular to a multi-purpose fuel injection performance testing device and testing method. Background Art

[0002] The injector is the core component of the engine, and the fuel injection characteristics directly affect the power, economy and emission characteristics of the entire engine; in the detection of injector fuel injection characteristics, the impulse method and the volumetric method are two commonly used measurement methods.

[0003] The volumetric method is to fill a rigid and sealed test chamber with fuel, insert the injector to be tested into the test chamber, and obtain the injection rate by measuring the pressure change in the container; the impulse method measures the force signal of the fuel outlet through a force sensor, and obtains the injection characteristics of the fuel through a series of conversions.

[0004] The existing fuel testing device with announcement number CN104405553B uses the impulse method to test the injection characteristics of the injector, but the device has a single testing method and cannot be applied to other detection methods at the same time. The use of other testing methods (such as the volumetric method) requires the replacement of the testing device, which has high testing costs. Summary of the invention

[0005] The present application provides a multi-purpose fuel injection performance test device to solve the deficiencies in the above-mentioned prior art, and adopts the following technical solutions: A multi-purpose fuel injection performance testing device comprises a bomb container, wherein the bomb container is provided with an external connection structure for connecting the bomb container with the outside; A clamping mechanism located on the bomb container, the clamping mechanism is used to clamp and fix the ejector; A detection component and an adjustment mechanism are located in the container, the adjustment mechanism is detachably connected to the container, the detection component is connected to the adjustment mechanism, the adjustment mechanism is used to adjust the alignment between the detection component and the injector, and the detection component is used to test the performance of the injector; The detection component cooperates with the external structure to perform impulse method and volume method tests on the injector for gas or liquid fuel.

[0006] Preferably, the adjustment mechanism includes a bracket, and a first adjustment part and a second adjustment part arranged on the bracket for adjusting the position of the detection component, a fixing plate is provided between the first adjustment part and the second adjustment part, and the detection component is arranged on the second adjustment part.

[0007] Preferably, the second adjustment mechanism is provided with an adjustment plate for supporting the detection component, and the detection component can move and / or rotate on the adjustment plate.

[0008] Preferably, the external connection structure includes at least one external connection hole, and a liquid supply system and an air supply system detachably connected to the external connection hole, the liquid supply system can supply fuel to the bomb container, and the air supply system can adjust the internal pressure of the bomb container.

[0009] Preferably, the bomb container comprises a bomb container body and at least one pressing block, the bomb container body is provided with a cavity communicated with the outside, and the pressing block is sealingly connected to the bomb container body for sealing the cavity.

[0010] Preferably, it also includes an umbrella device, which is connected to the adjustment mechanism and is mainly used for gas impulse method testing.

[0011] Preferably, it also includes a baffle, which is detachably connected in the bomb container and located between the detection component and the injector.

[0012] Preferably, the detection component includes a first sensor arranged on the regulating mechanism for detecting the impact force of the fuel, a second sensor arranged on the bomb container for detecting the pressure inside the bomb container, and a third sensor for detecting the temperature.

[0013] The present application also provides a multi-purpose fuel injection performance test method, which uses the multi-purpose fuel injection performance test device described above, and includes the following steps: Step 1: Use the clamping mechanism to install and fix the injector; Step 2: When performing a gas or liquid fuel impulse method test, first install the adjustment mechanism and the first sensor, and adjust the position of the first sensor by the adjustment mechanism so that the first sensor is aligned with the axis of the injector nozzle. For the gas impulse method test, since the gas spray cone angle is large, an umbrella device is required to perform local impulse measurement; Step 3: regulating the internal pressure of the bomb container to reach the test pressure through the external structure and the second sensor; Step 4: Power the injector, turn on the injector and test the injection characteristics in cooperation with the first sensor; Step 5: When performing a gas or liquid fuel volumetric test, first ensure that the adjustment mechanism and the first sensor inside the container are removed; Step 6: Filling the interior of the bomb container with corresponding gas or liquid fuel through the external structure, so that the interior of the bomb container is filled with corresponding gas or liquid fuel; Step 7: Power the injector, turn on the injector and test the injection characteristics in cooperation with the second sensor.

[0014] After completing step 1, you can select steps 2 to 4 to perform a gas or liquid fuel impulse method test on the injector, or / and select steps 5 to 7 to perform a gas or liquid fuel volumetric method test.

[0015] This method can use different test methods for different fuels to quickly and effectively test the fuel injection characteristics, and can perform volumetric method or impulse method tests accordingly after performing impulse method or volumetric method tests, which not only saves time but also provides more accurate test data.

[0016] Compared with the prior art, the beneficial effects of this application are: (1) The external structure can adjust the internal pressure of the cartridge and cooperate with the detection component to realize impulse detection of gas or liquid fuel, or fill the cartridge with gas or liquid fuel and cooperate with the detection component to realize volumetric detection of gas or liquid fuel. It can realize impulse method and volumetric method detection of the injector, which is easy to operate and can reduce manufacturing costs.

[0017] (2) The device is equipped with an umbrella-shaped device and a baffle, which can test corrosive fuels or fuels prone to flash boiling, reduce the corrosion of the corrosive fuel to the bomb, improve the durability of the bomb, and has better versatility, and can be used to test different fuels.

[0018] (3) The first adjustment part and the second adjustment part are graduated discs, which can make the angle adjustment of the first sensor more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of this application; Figure 2 is a simplified schematic diagram of the present application; Figure 3 It is a schematic diagram of the structure of the regulating mechanism of the present application; Figure 4 This application Figure 1 A partial enlarged view of point A in the middle.

[0020] In the figure: 1. Injector; 2. a bullet container, 20. a bullet container body, 21. a pressing block, 22. a cavity, 23. an opening; 3. Clamping mechanism, 31. Gland, 32. Sleeve, 33. Clamp, 34. Press; 4. adjusting mechanism, 41. bracket, 42. first adjusting part, 43. second adjusting part, 44. adjusting plate, 45. fixing plate; 5. Detection component, 51. first sensor, 52. second sensor, 53. third sensor; 6. baffle; 7. umbrella-shaped device; 8. external connection hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described in the present application are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0022] The volumetric method, also known as the Zeuch method, is a method that uses the compressibility of fuel to measure the injection pattern. The key to the volumetric method measurement is to accurately measure the change in pressure in the chamber before and after the injection. When measuring, first fill the rigid and sealed test chamber with fuel, insert the injector to be tested into the test chamber, and seal the chamber around it. When the injector starts to spray fuel, due to the compressibility of the fuel, the pressure in the fixed chamber will rise as the amount of fuel injected increases. According to the pressure change in the test chamber and the elastic modulus of the fuel, the pressure in the fixed chamber will rise. , the volume of fuel injected by the injector can be calculated using the following formula:

[0023] In the above formula, is the volume of fuel injected by the injector, is the volume of the rigid test chamber, is the change in pressure inside the chamber.

[0024] See also Figures 1 to 4 , further illustrating the present application: a multi-purpose fuel injection performance test device, used for testing the injection characteristics of an injector 1, comprising a cartridge 2 and a clamping mechanism 3, as well as a detection component 5 and an adjustment mechanism 4 arranged in the cartridge 2; the clamping mechanism 3 is arranged on the cartridge 2 for clamping and fixing the injector 1 to prevent the injector 1 from vibrating during detection; an external structure is provided on the cartridge 2, which can connect the cartridge 2 with the outside, and the injector 1 can be tested by impulse method and volume method of gas or liquid fuel in cooperation with the detection component 5, so as to achieve multi-purpose use of one machine and reduce manufacturing costs; the external structure is a through hole; the detection component 5 is respectively arranged on the cartridge 2 and the adjustment mechanism 4; the adjustment mechanism 4 is detachably arranged in the cartridge 2, and is used to adjust the direct distance and alignment between the detection component 5 thereon and the nozzle of the injector 1, that is, to ensure that the detection component 5 can be coaxial with the nozzle axis of the injector, and ensure the accuracy of impulse method detection.

[0025] The external connection structure includes at least one external connection hole 8, and an air supply system and a liquid supply system which are detachably connected to the external connection hole 8; in the present embodiment, there is only one external connection hole 8 to avoid leakage caused by too many external connection holes 8; wherein, the air supply system includes an air supply device, an oil mist separator and a regulating valve for releasing the internal pressure of the container bomb 2, and a three-way valve 1 connecting the air supply device, the oil mist separator and the container bomb 2, and the air supply system is used to adjust the internal back pressure of the container bomb; the liquid supply system includes a supply pump, a fuel tank and a pressure relief valve, and a three-way valve 2 connecting the supply pump, the container bomb and the pressure relief valve, and the liquid supply system is used to supply fuel to the container bomb; in an embodiment not shown, there may be multiple external connection holes 8, which are respectively connected to the air supply system and the liquid supply system.

[0026] The present application can be simultaneously applicable to impulse method and volumetric method tests of gas or liquid fuel on the injector 1. When the impulse method test is used, the external structure is used to adjust the internal pressure of the container 2, and the regulating mechanism 4 can stably support the detection component 5 thereon, so that the detection component 5 is aligned with the injector 1, thereby improving the detection accuracy to achieve impulse method testing of the injector 1; when the volumetric method is needed to test the gas or liquid fuel, after taking out the regulating mechanism 4, the corresponding gas or liquid fuel can be filled into the interior of the container 2 through the external structure, and the volumetric method test of the injector 1 can be achieved in conjunction with the detection component 5. Therefore, the present application can simultaneously perform volumetric method and impulse method tests on the injector 1 for gas or liquid fuel, has strong versatility, and can reduce costs.

[0027] Combination Figure 1 In this embodiment, the detection component 5 includes a first sensor 51, a second sensor 52, and a third sensor 53 for detecting the internal temperature of the container 2, and the third sensor 53 is a temperature sensor; the first sensor 51 is arranged on the regulating mechanism 4, and is used to detect the force signal of the injector 1 spraying fuel, so as to realize the impulse method detection; the first sensor 51 is a force sensor; the second sensor 52 is arranged on the container 2, and is used to detect the change of the pressure in the cavity 22 of the container 2 before and after the injector 1 sprays fuel, so as to realize the volume method detection, and the second sensor 52 is a pressure sensor.

[0028] The bomb 2 includes a bomb body 20 and at least one pressure block 21. In this embodiment, there are two pressure blocks 21. The external structure, the second sensor 52 and the third sensor 53 are simultaneously arranged on any of the pressure blocks 21. Of course, they can also be arranged separately on different pressure blocks 21 or on the bomb body 20. The bomb body 20 is provided with a cavity 22 connected to the outside. The pressure block 21 is sealed with the bomb body 20 to seal the cavity 22. The nozzle of the injector extends into the cavity 22. Specifically, at least one opening 23 is provided on the bomb body 20 to connect to the outside, so as to facilitate the placement or removal of the detection component 5 and the adjustment mechanism 4. The pressure block 21 is sealed to the opening 23 to ensure that no leakage occurs when using the impulse method or the volume method, thereby improving the test accuracy.

[0029] Combination Figure 2 and Figure 3 The adjustment mechanism 4 includes a bracket 41, and a first adjustment part 42 and a second adjustment part 43 provided on the bracket 41 for adjusting the position of the first sensor 51. A fixing plate 45 is provided between the first adjustment part 42 and the second adjustment part 43. The first sensor 51 is provided on the second adjustment part 43. Figure 1 The state is described as follows: one end of the bracket 41 is detachably connected to the bullet-capable body 20, and the other end is provided with the first adjusting portion 42. The first adjusting portion 42 is used to adjust the first sensor 51 to rotate and adjust the angle along the z-axis to be centered with the injector 1, and the second adjusting portion 43 is used to adjust the first sensor 51 to rotate and adjust the angle along the x-axis to be centered with the injector 1.

[0030] An adjustment plate 44 is provided between the second adjustment part 42 and the first sensor 51, and the adjustment plate 44 is used to adjust the first sensor 51 to move or / and rotate along the adjustment plate 44. The adjustment plate 44 includes a support plate and a movable plate, a slide groove is provided on the support plate, and a connecting piece is provided between the movable plate and the slide groove; the connecting piece can be an adjustment bolt, and the movement and rotation of the movable plate can be achieved by adjusting its tightness; the movable plate is used to install the first sensor 51. The movable plate can drive the first sensor 51 to move or / and rotate along the slide groove, so that the first sensor 51 is close to or away from the injector 1; the first adjustment part 41 and the second adjustment part 42 are both graduated discs, and the angle adjustment is more precise; it is convenient to adjust the position of the first sensor 51 in the space inside the cavity 22, so that the first sensor 51 is aligned with the axis of the nozzle; during testing, the adjustment mechanism 4 can stably support the first sensor 51 to avoid shaking and ensure detection accuracy.

[0031] Combination Figure 1 The clamping mechanism 3 includes a pressure cover 31, a sleeve 32, a clamp 33 and a press 34 which are sequentially arranged on the bomb container 2. The sleeve 32 is used to support the injector 1 and is fixed by the clamp 33 and the press 34. The pressure cover 31 is used to connect the sleeve 32 and the bomb container 2. The bomb container body 20, the pressure cover 31 and the sleeve 32 are sealed to avoid fuel leakage. The clamping mechanism 3 can stably clamp and fix the injector 1 to avoid shaking or vibration during testing.

[0032] In one embodiment, in combination Figure 1 and Figure 4 The chamber 22 is further provided with a baffle 6, which is located between the injector 1 and the first sensor 51 and is mounted on the bomb body 20. The bomb 2 can be made of stainless steel; the baffle 6 can reduce the corrosive fuel ejected by the injector 1 from splashing onto the inner wall of the chamber 22, thereby reducing the degree of corrosion of the bomb 2 by the corrosive fuel, improving its durability, and thus increasing the service life of the device.

[0033] In one embodiment, when testing gas fuel and liquid fuel that is prone to flash boiling, it is difficult for the force sensor to receive the entire spray; Figure 4 The regulating mechanism is also provided with an umbrella device 7, which is an umbrella-shaped spray separator for receiving one of the spray beams ejected, and obtaining the spray momentum flux after integrating the spray beam; the umbrella device 7 is mounted on the movable plate, and the umbrella device 7 is arranged so that the multi-purpose fuel injection performance test device can test gas fuels and liquid fuels that are prone to flash boiling, such as liquid ammonia.

[0034] In one embodiment, a heating component may be further provided in the cavity 22 , and the heating component cooperates with the third sensor to adjust the internal temperature of the cavity 22 .

[0035] The present application also provides a fuel injection performance testing method, comprising the above-mentioned multi-purpose fuel injection performance testing device, and the steps are as follows: Step 1: Use the clamping mechanism to install and fix the injector; loosen and remove the press and the clamp, place the injector, and then place the clamp and the press in sequence to fix them.

[0036] Step 2: When performing a gas or liquid fuel impulse method test, first install the adjustment mechanism and the first sensor, adjust the position of the first sensor through the adjustment mechanism, and align the first sensor with the axis of the injector nozzle; remove the clamping block, and place the adjustment mechanism and the first sensor into the cavity through the opening. After the centering adjustment is completed, reinstall the pressing block to ensure the air tightness of the cavity. For the gas impulse method test, since the gas spray cone angle is large, an umbrella device is required to perform local impulse measurement.

[0037] Step 3: The internal pressure of the bomb container is regulated to reach the test pressure through the external structure and the second sensor; the internal pressure of the cavity is adjusted through the external hole by the air supply system.

[0038] Step 4: Power the injector, turn on the injector and test the injection characteristics in cooperation with the first sensor.

[0039] Step 5: When performing a gas or liquid fuel volumetric test, first ensure that the adjustment mechanism and the first sensor inside the container are removed.

[0040] Step 6: Fill the interior of the container with corresponding gas or liquid fuel through the external structure, so that the interior of the container is filled with corresponding gas or liquid fuel; fill the cavity with corresponding gas or liquid fuel through the external hole via the liquid supply system.

[0041] Step 7: Power the injector, turn on the injector and test the injection characteristics in cooperation with the second sensor.

[0042] In the above operation steps, according to the method required for testing, after completing step 1, you can select steps 2 to 4 to perform a gas or liquid fuel impulse method test on the injector, or / and select steps 5 to 7 to perform a gas or liquid fuel volumetric method test. Different test methods can be used for different fuels to quickly and effectively test the fuel injection characteristics, and after performing the impulse method or volumetric method test, the volumetric method or impulse method test can be performed accordingly, which not only saves time but also makes the test data more accurate.

Claims

1. Multi-purpose fuel injection performance test device, characterized in that: It includes a bomb container, on which an external structure is provided for connecting the bomb container with the outside; A clamping mechanism located on the bomb container, the clamping mechanism is used to clamp and fix the ejector; A detection component and an adjustment mechanism are located in the container, the adjustment mechanism is detachably connected to the container, the detection component is connected to the adjustment mechanism, the adjustment mechanism is used to adjust the alignment between the detection component and the injector, and the detection component is used to test the performance of the injector; The detection component cooperates with the external structure to perform impulse method and volume method tests on the injector for gas or liquid fuel.

2. The multi-purpose fuel injection performance testing device according to claim 1, characterized in that: The adjustment mechanism includes a bracket, and a first adjustment part and a second adjustment part arranged on the bracket for adjusting the position of the detection component, a fixing plate is arranged between the first adjustment part and the second adjustment part, and the detection component is arranged on the second adjustment part.

3. The multi-purpose fuel injection performance testing device according to claim 2, characterized in that: The second adjusting mechanism is provided with an adjusting plate for supporting the detecting component, and the detecting component can move and / or rotate on the adjusting plate.

4. The multi-purpose fuel injection performance testing device according to claim 1, characterized in that: The external connection structure includes at least one external connection hole, and a liquid supply system and an air supply system detachably connected to the external connection hole. The liquid supply system can supply fuel to the bomb container, and the air supply system can adjust the internal pressure of the bomb container.

5. The multi-purpose fuel injection performance testing device according to claim 1, characterized in that: The bomb container comprises a bomb container body and at least one pressing block. The bomb container body is provided with a cavity communicated with the outside. The pressing block is sealed and connected to the bomb container body to seal the cavity.

6. The multi-purpose fuel injection performance testing device according to claim 1, characterized in that: It also includes an umbrella device, which is connected to the regulating mechanism and is mainly used for gas impulse method testing.

7. The multi-purpose fuel injection performance testing device according to claim 1, characterized in that: It also includes a baffle, which is detachably connected in the bomb container and located between the detection component and the injector.

8. The multi-purpose fuel injection performance testing device according to any one of claims 1 to 7, characterized in that: The detection component includes a first sensor arranged on the regulating mechanism for detecting the impact force of the fuel, a second sensor arranged on the bomb container for detecting the pressure inside the bomb container, and a third sensor for detecting the temperature.

9. A multi-purpose fuel injection performance testing method, comprising the multi-purpose fuel injection performance testing device according to claim 8, characterized in that: The following steps are also included: Step 1: Use the clamping mechanism to install and fix the injector; Step 2: When performing a gas or liquid fuel impulse method test, first install the adjustment mechanism and the first sensor, and adjust the position of the first sensor by the adjustment mechanism so that the first sensor is aligned with the axis of the injector nozzle. For the gas impulse method test, since the gas spray cone angle is large, an umbrella device is required to perform local impulse measurement; Step 3: regulating the internal pressure of the bomb container to reach the test pressure through the external structure and the second sensor; Step 4: Power the injector, turn on the injector and test the injection characteristics in cooperation with the first sensor; Step 5: When performing a gas or liquid fuel volumetric test, first ensure that the adjustment mechanism and the first sensor inside the container are removed; Step 6: Filling the interior of the bomb container with corresponding gas or liquid fuel through the external structure, so that the interior of the bomb container is filled with corresponding gas or liquid fuel; Step 7: Power the injector, turn on the injector and test the injection characteristics in cooperation with the second sensor.

10. A multi-purpose fuel injection performance testing method according to claim 9, characterized in that: After completing step 1, you can select steps 2 to 4 to perform a gas or liquid fuel impulse method test on the injector, or / and select steps 5 to 7 to perform a gas or liquid fuel volumetric method test.

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