Performance detection equipment for direct injection fuel injector

Abstract

The utility model discloses in-cylinder direct injection oil injector performance detection equipment which comprises an equipment body provided with a detection chamber, a collecting plate for collecting leaked fuel oil is arranged in the detection chamber, a pressing mechanism and a common rail pipe are arranged above the collecting plate, and the pressing mechanism can move in the z-axis direction to clamp and fix at least one oil injector; an oil storage unit, an oil pumping device and a detection unit are arranged below the collecting plate, the oil storage unit supplies fuel oil to the oil injector through the common rail pipe, and the detection unit is correspondingly arranged at the bottom of the pressing mechanism and used for detecting the injection flow of the oil injector. And the oil pumping device can convey the fuel oil in the detection unit back into the oil storage unit to form a closed detection loop. The fuel injector is detected through automatic control of the closed-loop detection loop, the detection result is more accurate, the labor intensity can be reduced, the detection efficiency can be improved, leaked fuel oil can be recycled, and it is ensured that the interior of equipment is clean and tidy.

Description

Technical Field

[0001] The present application relates to an engine fuel injection detection device, and particularly to a device for detecting the performance of an in-cylinder direct injection injector. Background Art

[0002] The injector is a key component in the gasoline injection system used to accurately measure fuel and form a spray. The electronic control unit adjusts the fuel supply of the engine by controlling the injection time of the injector, and further precisely controls the air-fuel ratio. The flow characteristics of the injector directly affect the fuel injection effect, and have a direct impact on the matching of the gasoline engine and the electronic control system and the performance of the electronically controlled engine. Therefore, it is necessary to ensure the flow consistency of all products during the production process. In the existing injector flow detection device, during the detection process, the tester needs to participate in the operation manually to complete the whole test process, which not only has a large labor intensity and low efficiency, but also is prone to affect the accuracy of the injector detection result due to improper operation. Summary of the Utility Model

[0003] The present application provides a device for detecting the performance of an in-cylinder direct injection injector to solve the deficiencies in the prior art, and adopts the following technical solutions:

[0004] The device for detecting the performance of an in-cylinder direct injection injector includes a device body provided with a detection chamber. A collecting plate for collecting leaked fuel is arranged in the detection chamber. Above the collecting plate, there are a pressing mechanism and a common rail pipe. The pressing mechanism can move along the z-axis direction to clamp and fix at least one injector. Below the collecting plate, there are an oil storage unit, an oil pumping device, and a detection unit. The oil storage unit supplies fuel to the injector through the common rail pipe. The detection unit is correspondingly arranged at the bottom of the pressing mechanism and is used to detect the injection flow rate of the injector. The oil pumping device can transport the fuel in the detection unit back to the oil storage unit to form a closed-loop detection circuit.

[0005] Preferably, the collecting plate includes a partition plate and an oil leakage plate arranged on the partition plate to support the common rail pipe. A diversion groove is arranged on the partition plate, and the diversion groove is communicated with the oil storage unit.

[0006] Preferably, the pressing mechanism includes a bracket and at least one first power device, as well as a floating joint and a connecting seat sequentially connected to the driving end of the first power device. A corresponding mounting seat is arranged on the collecting plate for the connecting seat. The connecting seat is slidably connected to the bracket and is used to connect the common rail pipe and the injector.

[0007] Preferably, the oil storage unit includes a second power device and a cooling fuel tank. The second power device is used to drive the fuel in the cooling fuel tank to be supplied to the common rail pipe, and the cooling fuel tank can move out of the device body along the y-axis direction.

[0008] Preferably, the oil pumping device is respectively connected to the detection unit and the oil storage unit.

[0009] Preferably, a detection component and a heating component are provided in the cooling fuel tank, and the detection component is used to detect the liquid level and temperature in the cooling fuel tank.

[0010] Preferably, a filtering component is further included, and the filtering component is arranged between the second power device and the cooling fuel tank for filtering the fuel in the cooling fuel tank.

[0011] Preferably, a heat dissipation structure is further included, and the heat dissipation structure includes heat dissipation holes and a heat dissipation fan arranged on the equipment body.

[0012] Preferably, a control device is further included, and the control device is arranged on the equipment body and on one side of the detection chamber. The control device is electrically connected to the oil storage unit, the detection unit, and the oil pumping device.

[0013] Preferably, the detection unit includes a measuring component, a collection cup, and a mounting rack. The mounting rack is arranged at the bottom of the collection plate, and the measuring component is used to measure the fuel collected in the collection cup.

[0014] The beneficial effects of the present application are as follows:

[0015] (1) The automatic pressing and fixing of the fuel injector can be realized through the pressing mechanism, and the fixing is convenient and reliable; during operation, the oil storage unit supplies fuel to the fuel injector through the common rail pipe, the detection unit detects the injection flow rate of the fuel injector, and the oil pumping device transports the fuel in the detection unit back to the oil storage unit to form a closed-loop detection circuit. The accurate detection of the circulating fuel volume of the fuel injector is carried out through the automatic control of the closed-loop detection circuit, which can reduce the labor intensity and improve the detection efficiency.

[0016] (2) The collection plate separates the common rail pipe and the pressing mechanism from the oil storage unit, the detection unit, and the detection unit. During the detection process, the collection plate can collect and reuse the leaked fuel to ensure the cleanliness of the detection chamber and avoid fuel waste.

[0017] (3) A collection plate is arranged between the detection unit and the pressing mechanism. If the fuel injector leaks during detection, the fuel will not directly drip on the detection unit, which can further improve the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional schematic diagram of the present application;

[0019] Figure 2 is an internal structure schematic diagram of the present application;

[0020] Figure 3 is a structural schematic diagram of the pressing mechanism of the present application.

[0021] In the figure:

[0022] 1. Equipment body, 10. Detection chamber, 11. Door structure;

[0023] 2. Pressing mechanism, 21. Pneumatic cylinder, 22. Bracket, 23. Floating joint, 24. Connecting seat, 25. Mounting seat;

[0024] 3. Oil storage unit, 31. Cooling oil tank, 32. High-pressure pump;

[0025] 4. Detection unit, 41. Collection cup, 42. Weighing sensor;

[0026] 5. Oil pumping device, 6. Common rail pipe, 7. Control device;

[0027] 8. Collection plate, 81. Partition board, 82. Oil leakage board, 9. Heat dissipation structure;

[0028] 100. Injector. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings of the present application. Obviously, the described embodiments of the present application are only some of the embodiments of the present application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0030] Refer to Figures 1 to 3 , for further description of the present application:

[0031] In combination with Figure 1 , a performance detection device for in-cylinder direct injection injectors, which includes an equipment body 1. A detection chamber 10 for detecting the injector 100 is provided in the equipment body 1. A door structure 11 is rotatably connected to the equipment body 1. A hydraulic support rod is provided between the door structure 11 and the equipment body 1, and the hydraulic support rod is used to support the door structure 11 to open. The door structure 11 is used to seal the detection chamber 10. When detecting the injector 100, it can prevent external impurities from entering the detection chamber 10 and ensure the test safety at the same time.

[0032] In combination with Figure 2, a collecting plate 8 is provided in the detection chamber 10. Above the collecting plate 8, a common rail pipe 6 and a pressing mechanism 2 are provided. The pressing mechanism 2 can move along the z-axis direction to clamp and fix at least one fuel injector 100. Below the collecting plate 8, an oil pumping device 5, an oil storage unit 3, and a detection unit 4 for collecting and weighing the fuel injected by the fuel injector 100 are provided. The detection unit 4 is correspondingly arranged at the bottom of the pressing mechanism 2. The common rail pipe 6 is respectively connected to the oil storage unit 3 and the fuel injector 100 to provide constant high-pressure fuel for each fuel injector 100, reduce the fuel pressure fluctuation, ensure the stability and accuracy of fuel injection, and thus can accurately detect the flow rate of the fuel injector 100. The oil pumping device 5 can transport the fuel in the detection unit 4 back to the oil storage unit 3 and recycle the fuel to form a closed-loop detection circuit. Among them, the oil pumping device 5 can be an electronic pump, and the electronic pump is respectively connected to the detection unit 4 and the oil storage unit 3. By automatically controlling the closed-loop detection circuit to detect the fuel injector 100, the detection result is more accurate, which can reduce the labor intensity of the detection personnel and improve the detection efficiency.

[0033] Due to the risk of fuel leakage during the detection process, in order to ensure the cleanliness inside the detection chamber 10; combined with Figure 3 , the collecting plate 8 includes a partition plate 81 and an oil leakage plate 82 for supporting the common rail pipe 6. The partition plate 81 is provided with a diversion groove, and the diversion groove is communicated with the oil storage unit 3 and can be connected by an oil pipe. When the components above the collecting plate 8 leak, the fuel flows back into the oil storage unit 3 through the diversion groove, which can recycle the leaked fuel and ensure the cleanliness inside the detection chamber 10 at the same time.

[0034] Combined with Figure 3, the pressing mechanism 2 can move along the z-axis direction to press and fix the fuel injector 100; the pressing mechanism 2 can detect a single or multiple fuel injectors 100 simultaneously; wherein, the pressing mechanism 2 includes at least one first power device and a bracket 22, and a connecting seat 24 connected to the driving end of the first power device; in this embodiment, there are 4 first power devices, and correspondingly 4 fuel injectors to be tested can be clamped and fixed; of course, a floating joint 23 can be provided between the first power device and the connecting seat 24, which helps to maintain the stable operation of the equipment and improve the reliability and stability of the equipment; the first power device is a pneumatic cylinder 21; an installation seat 25 corresponding to the connecting seat 24 is provided on the collection plate 8, the fuel injector 100 is installed between the connecting seat 24 and the installation seat 25, and the connecting seat 24 is slidably connected to the bracket 22 for connecting the common rail 6 and the fuel injector 100; an oil passage is provided in the connecting seat 24 to connect the common rail 6 and the fuel injector 100; the pneumatic cylinder 21 drives the connecting seat 24 to move along the z-axis direction to fix the fuel injector 100 between the connecting seat 24 and the installation seat 25, and when the fuel injector is pressed, the connecting seat 24 connects the common rail 6 and the fuel injector 100.

[0035] Combined with Figure 3 , the detection unit 4 includes a collection cup 41 and a measuring component, and a mounting bracket provided at the bottom of the collection plate, the mounting bracket is used to support the measuring component and the collection cup 41, during detection, if the fuel injector leaks, the leaked fuel will not drip onto the detection unit along the pressing mechanism, thus further ensuring the accuracy of the detection result; the collection cup 41 is used to receive the fuel sprayed by the fuel injector 100, the measuring component is used to detect the fuel in the collection cup 41, and the measuring component can be a load cell 42; before starting the detection, when there is too much fuel in the collection cup 41, the fuel pumping device 5 works, and the fuel in the collection cup is transported back to the cooling fuel tank for recycling through a fuel pipe, without the interference of the operator, automatic weighing detection can be realized, and the detection result is more accurate. A demister corresponding to the collection cup 41 can also be provided at the bottom of the collection plate 8 to turn the fuel sprayed by the fuel injector 100 into a continuous and stable fluid to reduce the measurement error.

[0036] Combined with Figure 2 , the fuel storage unit 3 includes a second power device and a cooling fuel tank 31, the second power device is a high-pressure pump 32, driven by a motor, and is used to drive the fuel supply in the cooling fuel tank 31 to the common rail 6; the cooling fuel tank 31 can move out of the equipment body 1 along the y-axis direction to facilitate fuel replenishment, and the movement can be achieved by setting a slide rail on the cooling fuel tank 31. A heating component can be provided in the cooling fuel tank 31 to control the fuel temperature.

[0037] A detection assembly is provided in the cooling fuel tank 31. The detection assembly is used to detect the liquid level and temperature in the cooling fuel tank 31. A heat dissipation structure 9 is further provided in the detection chamber 10. The heat dissipation structure 9 includes heat dissipation holes and heat dissipation fans provided on the equipment body 1, which are used to control the temperature in the detection chamber 10, can dissipate heat from the oil storage unit 3 and the oil pumping device 5, control the fuel temperature, and improve safety and detection accuracy.

[0038] In some embodiments, a filtering component is further included. The filtering component is provided between the first power device and the cooling fuel tank 31 and is used to filter the fuel in the cooling fuel tank 31. This can prevent impurities from being supplied to the fuel injector 100 and causing blockage, which may affect the detection accuracy.

[0039] A control device 7 is also included. The control device 7 is provided on the equipment body 1 and is located on one side of the detection chamber 10. The control device 7 is electrically connected to the oil storage unit 3, the detection unit 4, and the oil pumping device 5. By presetting parameters such as rail pressure value, pulse width value, frequency, injection times, and oil temperature in the control device 7, the control device 7 controls the coordinated operation of each part to detect the fuel injector 100, so as to achieve automatic detection.

Claims

1. In-cylinder direct injection injector performance detection equipment, characterized in that: It includes an equipment body with a detection chamber. Inside the detection chamber, there is a collection plate for collecting leaked fuel. Above the collection plate, there is a pressing mechanism and a common rail pipe. The pressing mechanism can move along the z-axis direction to clamp and fix at least one fuel injector. Below the collection plate, there is an oil storage unit, an oil pumping device, and a detection unit. The oil storage unit supplies fuel to the fuel injector through the common rail pipe. The detection unit is correspondingly arranged at the bottom of the pressing mechanism and is used to detect the injection flow rate of the fuel injector. The oil pumping device can transport the fuel in the detection unit back to the oil storage unit to form a closed-loop detection circuit.

2. The in-cylinder direct injection injector performance detection device according to claim 1, wherein: The collection plate includes a partition plate and an oil leakage plate arranged on the partition plate to support the common rail pipe. The partition plate is provided with a diversion groove, and the diversion groove is communicated with the oil storage unit.

3. The in-cylinder direct injection injector performance detection device according to claim 1, characterized in that: The pressing mechanism includes a bracket and at least one first power device, as well as a floating joint and a connecting seat sequentially connected to the driving end of the first power device. The collection plate is provided with a mounting seat corresponding to the connecting seat. The connecting seat is slidably connected to the bracket and is used to connect the common rail pipe and the fuel injector.

4. The in-cylinder direct injection injector performance detection device according to claim 1, characterized in that: The oil storage unit includes a second power device and a cooling fuel tank. The second power device is used to drive the fuel in the cooling fuel tank to be supplied to the common rail pipe. The cooling fuel tank can move out of the equipment body along the y-axis direction.

5. The in-cylinder direct injection injector performance detection device according to claim 1, wherein: The oil pumping device is respectively communicated with the detection unit and the oil storage unit.

6. The in-cylinder direct injection injector performance detection device according to claim 4, characterized in that: The cooling fuel tank is provided with a detection component and a heating component. The detection component is used to detect the liquid level and temperature in the cooling fuel tank.

7. The in-cylinder direct injection injector performance detection device according to claim 4, wherein: It also includes a filtering component. The filtering component is arranged between the second power device and the cooling fuel tank and is used to filter the fuel in the cooling fuel tank.

8. The in-cylinder direct injection injector performance detection device according to claim 1, characterized in that: It also includes a heat dissipation structure. The heat dissipation structure includes heat dissipation holes and a heat dissipation fan arranged on the equipment body.

9. The in-cylinder direct injection injector performance detection device according to claim 1, wherein: It also includes a control device. The control device is arranged on the equipment body and is located on one side of the detection chamber. The control device is electrically connected to the oil storage unit, the detection unit, and the oil pumping device.

10. The in-cylinder direct injection injector performance detection device according to claim 1, characterized in that: The detection unit includes a measuring component, a collection cup, and a mounting frame. The mounting frame is arranged at the bottom of the collection plate. The measuring component is used to measure the fuel collected in the collection cup.

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