WO2019222967A1 - Simulation test apparatus for detecting nozzle - Google Patents

Abstract

A simulation test apparatus for detecting a nozzle, comprising: an air pressure regulation apparatus, a first valve (100), a second valve (200), a fuel storage apparatus (21), a third valve (300), a pump component (23), a test part (600), and a controller. The controller is separately connected to the first valve (100), the second valve (200), and the third valve (300); under the control of the controller, the simulation test apparatus forms a first circuit and a second circuit; the first circuit comprises the pump component (23), the third valve (300), the fuel storage apparatus (21), the second valve (200), and an outlet (15); the second circuit comprises the air pressure regulation apparatus, the first valve (100), the second valve (200), the fuel storage apparatus (21), the third valve (300), and the test part (600). The simulation test apparatus performs bidirectional cleaning by means of the two circuits, thereby improving the accuracy of a test result and prolonging the service life.

Description

[Name of invention formulated by ISA in accordance with Rule 37.2] 模拟 A simulation test device for detecting a nozzle Technical field

The present application relates to the technical field of test equipment, and in particular, to a simulation test device for detecting at least one electronically controlled injector, and more particularly, to a simulation tester for evaluating the clogging rate of gasoline-electrically controlled injector.

Background technique

The easy formation of deposits on the top of the electronically controlled injectors of gasoline engines limits the uniform injection of fuel, which causes problems of reduced fuel efficiency and increased emissions of pollutants. With the continuous progress of gasoline engine manufacturing technology, more and more in-cylinder direct injection engines on the market have replaced older engines. Due to their structural changes, they also directly affect the formation and distribution of carbon deposits in the engine. Therefore, detecting the clogging of the electronically controlled fuel injectors by the deposits at the needle valve of the electronically controlled injectors of gasoline has also become an important indicator for evaluating the clean performance of automotive gasoline. The test machine needs to be cleaned under long-term use or before each test. However, the existing test machine only has the function of cleaning the oil circuit and the oil storage tank in the test machine in one direction, and cannot completely clean the oil circuit in the test machine. After a long-term test, it will adhere to the oil circuit pipe. Too much viscous sludge on the wall and the inner wall of the oil storage tank will affect the experimental analysis data and cause analysis errors.

Summary of the Invention

According to an aspect of the present application, a simulation test device is provided, including: a nitrogen pressure regulating device, a first valve, a second valve, a fuel storage device, a third valve, a pump component, a test section, and a controller, wherein The first valve is in communication with the nitrogen pressure regulating device, the first valve is in communication with the second valve, the first valve is in communication with the outlet, and the second valve is also in communication with the fuel storage device. The second valve is also in communication with the outlet; the third valve is in communication with the pump component, the fuel storage device, and the test section; the controller is in communication with the first valve and the second valve, respectively Connected to the third valve, under the control of the controller, the simulation test device forms a first circuit and a second circuit, the first circuit includes the pump component, the third valve, the A fuel storage device, the second valve, and the outlet; the second circuit includes the nitrogen pressure regulating device, the first valve, the second valve, the fuel storage device, the first Valves and the test section.

The simulation test device of the present application has two circuits, so it is possible to perform bidirectional cleaning of the fuel storage device and the pipeline, the fuel distributor and the electronically controlled injector of the test machine, so that all components and pipelines in the device are cleaned. Can be thoroughly cleaned, which can improve the accuracy of test results and extend the service life of the device.

Optionally, the first port of the first valve is in communication with the nitrogen pressure regulating device, the second port of the first valve is in communication with the third port of the second valve, and the first port of the first valve Three ports communicate with the outlet; the first port of the second valve communicates with the third port of the first valve, the second port of the second valve communicates with the fuel storage device, and the The third port is in communication with the second port of the first valve; the first port of the third valve is in communication with the pump component, the second port of the third valve is in communication with the fuel storage device, and The third port of the third valve is in communication with the test section.

Optionally, the first port of the first valve, the first port of the second valve, and the first port of the third valve are normally closed ports, and the second port of the first valve, the The second port of the second valve and the second port of the third valve are normally open ports; the third port of the first valve, the third port of the second valve, and the third port of the third valve The port is a shared port.

With this structure, when the simulation test device is not working, that is, when the controller is not working, the gas will not enter the fuel storage device through the nitrogen pressure regulating device, and the liquid will not enter the fuel storage device through the pump component. Improved the safety performance of the entire control device.

Optionally, in a first cleaning mode or an oil storage mode, the controller is configured to inject liquid into the fuel storage device via the pump component and the third valve, and via the second valve and The outlet is discharged.

Optionally, in a second cleaning mode or a test mode, the controller is configured to inject gas into the fuel storage device through a nitrogen pressure regulating device and the first valve, so as to inject the gas in the fuel storage device. The liquid is discharged from the test section through the third valve.

Through the first cleaning process and the second cleaning process, all components and pipelines of the simulation test device can be thoroughly cleaned. Due to the connection relationship between the first circuit and the second circuit, both normal oil storage and testing can be achieved, and The original pipeline can be used for two-way cleaning without adding additional equipment, which is convenient to use and simple to operate.

Optionally, the test section includes: a fuel distributor, which is in communication with a third port of the third valve, and a lower end surface of the fuel distributor is further connected to at least one electronically controlled fuel injector; a heating device for: Heating the electronically controlled fuel injector and detecting the temperature of the electronically controlled fuel injector; and a measuring device provided below the electronically controlled fuel injector for accommodating the electrically injected fuel from the electronically controlled fuel injector Liquid and measure the amount of the liquid.

With this device, the blocking tendency of the electronically controlled injector can be determined by measuring the amount of liquid flowing out of the electronically controlled injector, and a long-term automatic detection of the electronically controlled injector is realized.

Optionally, a diversion nozzle is connected below the electronically controlled fuel injector.

The device uses a deflector to enable the liquid sprayed from the electronically controlled injector to flow vertically downward along the deflector to avoid splashing to the outside of the measurement device.

Optionally, the nitrogen pressure regulating device includes: a nitrogen pressure regulating valve for controlling the magnitude of the nitrogen pressure; and a gas pressure sensor connected to the nitrogen pressure regulating valve to detect the gas pressure of nitrogen during the nitrogen pressure regulation. And a display connected to the gas pressure sensor for displaying the value of the gas pressure of nitrogen.

Through this device, the gas pressure can be used to transfer liquid from the fuel storage device to the electronically controlled injector, and the pressure value can be displayed, so that the operator can adjust the gas pressure according to needs, and the operation is simple and fast.

Optionally, the test section further includes: a lifting device for carrying the measuring device, and adjusting a height of the measuring device.

The device adopts a lifting device that can adapt to the needs of measuring devices of different heights and adjust the distance between the measuring device and the electronically controlled injector.

Optionally, the measuring device is a measuring cylinder that is placed in a vertical direction in line with a needle valve portion of the electronically controlled injector.

The device uses a graduated cylinder to measure the amount of gasoline flowing out of the electronically controlled injector, and can easily and accurately obtain the detection result.

Optionally, the fuel distributor includes: an I-shaped channel, which is provided inside the fuel distributor and includes four ports, each of which communicates with four electronically controlled injectors; and the first A channel is provided inside the fuel distributor, the first channel is in communication with the center of the I-shaped channel, and an opening of the first channel is provided on a side wall of the fuel distributor, the opening The elbow is connected with the fuel storage device through a pipeline.

The device uses a fuel distributor to evenly distribute gasoline to each electronically controlled injector.

Optionally, the test section further includes a quick connector, one end of the quick connector is in communication with the fuel storage device, and the other end is in communication with the fuel distributor through a nylon tube.

The device uses a quick connector, which can quickly change the electronically controlled injectors, so as to test different electronically controlled injectors.

Optionally, the heating device includes a heating block having at least one through hole in a vertical direction, the through hole is used to receive a needle valve portion of the electronically controlled injector, and The needle valve part is heated; a temperature sensor for measuring the temperature of the heating block; and a temperature protection device connected to the temperature sensor for cutting off the heating device when the temperature of the heating block exceeds a predetermined temperature Power supply.

Optionally, the heating block is an aluminum block.

Optionally, a sealing ring and a sleeve are provided between the electronically controlled injector and the fuel distributor, the sealing ring is sleeved on the top of the electronically controlled injector, and the sleeve is provided at The seal ring is located below the seal ring and is sleeved on the electronically controlled injector.

The device uses a heating device to simulate the actual working environment of the electronically controlled injector, so that the test results are closer to the real data.

Optionally, a filter is further provided, and the filter is disposed between the pump component and the third valve or is disposed upstream of the pump component.

The device uses the filter to play a role in filtering gasoline impurities.

Based on the following detailed description of specific embodiments of the present application with reference to the accompanying drawings, those skilled in the art will more clearly understand the foregoing and other objectives, advantages, and features of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic diagram of a simulation test device in a first cleaning mode;

2 is a schematic diagram of a simulation test device in a second cleaning mode;

3 is a schematic diagram of a simulation test device in an oil storage mode;

4 is a schematic diagram of a simulation test device in a test mode;

5 is a schematic diagram of a test section of the simulation test device;

6 is a front view of an embodiment of a simulation test apparatus according to the present application;

7 is a left side view of an embodiment of a simulation test apparatus according to the present application;

8 is a rear view of an embodiment of a simulation test apparatus according to the present application;

9 is a schematic diagram of an internal passage of a fuel distributor in a simulation test device;

FIG. 10 is a schematic structural diagram of a connection part between an electronically controlled injector and a fuel distributor.

In the drawings:

1 electronically controlled injector control interface; 2 pressure display; 3 knobs; 4 quick connector; 5 temperature sensor interface; 6 temperature protection interface; 7 temperature sensor; 8 nylon tube; 9 elbow; 10 fuel distributor; 11 electronic control Injector; 12 heating block; 13 inlet; 14 diversion nozzle; 15 outlet; 16 measuring cylinder; 17 lifting device; 18 first partition; 19 first channel; 20 second partition; 21 fuel storage device; 22 nylon Tube; 23 pump parts; 24 nitrogen pressure regulating valve; 25 air supply nylon tube; 26 pressure transmitter; 27 second container; 28 filter; 29 first container; 30 casing; 31 sealing ring; 32 fuel distribution Hole in the device; 100 first valve, 101 first port of the first valve, 102 second port of the first valve, 103 third port of the first valve; 200 second valve, 201 first port of the second valve, 202 second port of the second valve, 203 third port of the second valve; 300 third valve, 301 first port of the third valve, 302 second port of the third valve, 303 third port of the third valve; 400 fourth valve; 500 fifth valve; 600 test department.

Detailed ways

An embodiment of the present application discloses a simulation test device. The device may include a nitrogen pressure regulating device, a first valve 100, a second valve 200, a fuel storage device 21, a third valve 300, a pump member 23, a test section 600, and a controller (not shown), wherein the first A valve 100 is in communication with the nitrogen pressure regulating device, the first valve 100 is in communication with the second valve 200, the first valve 100 is in communication with the outlet 15; the second valve 200 is also in communication with the fuel storage device 21, the first The two valves 200 are also in communication with the outlet 15; the third valve 300 is in communication with the pump member 23, the fuel storage device 21 and the test section 600, respectively; the controller is in communication with the first valve 100, the second valve 200 and The third valve 300 is connected. Under the control of the controller, the simulation test device forms a first circuit and a second circuit. The first circuit may include the pump component 23, the third valve 300, and the fuel storage device 21. The second valve 200 and the outlet 15; the second circuit may include the nitrogen pressure regulating device, the first valve 100, the second valve 200, the fuel storage device 21, the third valve 300, and the test section 600.

The simulation test device of the present application has two circuits, so it can perform all-round cleaning and cleaning of the internal pipeline of the instrument, the fuel storage device and the fuel distributor, so that all components and pipelines in the device can be obtained. Thorough cleaning can improve the accuracy of test results and prolong the service life of the device.

Optionally, the first valve 100, the second valve 200, and the third valve 300 are solenoid valves, and each may include three ports. The control device controls the opening and closing of each port of each valve. The first port of the first valve is in communication with the nitrogen pressure regulating device, the second port of the first valve is in communication with the third port of the second valve, and the third port of the first valve is in communication with the outlet; The first port of the second valve is in communication with the third port of the first valve, the second port of the second valve is in communication with the fuel storage device, the third port of the second valve is in communication with the second port of the first valve Communication; the first port of the third valve is in communication with the pump component, the second port of the third valve is in communication with the fuel storage device, and the third port of the third valve is in communication with the test section.

Optionally, the first port of the first valve, the first port of the second valve, and the first port of the third valve are normally closed ports, the second port of the first valve, and the first port of the second valve The second port and the second port of the third valve are normally open ports; the third port of the first valve, the third port of the second valve, and the third port of the third valve are common ports.

Under such a setting, when the simulation test device is not working, that is, when the controller is not working, the gas will not enter the fuel storage device through the nitrogen pressure regulating device, and the liquid will not enter the fuel storage device through the pump component. This improves the safety performance of the entire control device. It can be understood that the layout of each port of each valve is not limited to the above settings, and can be changed and changed according to needs, and the state of each port is controlled by the control device.

The modes that the control device can implement may include: a first cleaning mode, a second cleaning mode, an oil storage mode, and a test mode.

Optionally, the controller is configured to inject liquid into the fuel storage device through the pump component and the third valve in the first cleaning mode or the oil storage mode, and discharge the liquid through the second valve and the outlet. The controller is used to inject gas into the fuel storage device through the nitrogen pressure regulating device and the first valve in the second cleaning mode or the test mode, so that the liquid in the fuel storage device is removed from the fuel storage device through the third valve. The test section is discharged.

The controller is loaded with control software or connected with the controller and control buttons, and various modes of the controller are triggered by clicking the control software or pressing the control button.

The controller is used to inject liquid into the fuel storage device through the pump component and the third valve in the first cleaning mode or the oil storage mode, and discharge the liquid through the second valve and the outlet. The device may further include a fifth valve 500 disposed between the fuel storage device 21 and the second valve 200. The fifth valve 500 may be a solenoid valve controlled by a controller. The controller is used to inject gas into the fuel storage device 21 through the nitrogen pressure regulating device and the first valve 100 in the second cleaning mode or the test mode, so that the liquid in the fuel storage device 21 passes through the third valve 300 It is discharged from the test section 600.

Before the test or after the test has been carried out for a period of time, the internal piping of the instrument and the oil storage tank need to be cleaned. FIG. 1 is a schematic diagram of a simulation test apparatus in a first cleaning mode. In the first cleaning mode, the cleaning liquid is prepared according to the standard and placed in the first container 29 to trigger the first cleaning mode of the controller, and the simulation test device performs the first cleaning process through the first circuit. The cleaning liquid is drawn into the pipeline from the first container 29 by the pump component 23 to the third valve 300, and at this time, the first port 301 and the second port 302 of the third valve 300 are opened. The cleaning liquid enters from the bottom of the fuel storage device 21. After a period of injection, the cleaning liquid completely fills the fuel storage device 21. The fifth valve is always open. The cleaning liquid enters the second valve 200 through the fifth valve 500. At this time, the first port 201 and the second port 202 of the second valve 200 are opened, and the cleaning liquid passes through the second valve 200 to the second container 27. This first cleaning process can clean the fuel storage device 21 and its internal pipeline. After a period of time or a certain number of cycles, the role of cleaning the fuel storage device and pipeline is achieved.

FIG. 2 is a schematic diagram of a simulation test apparatus in a second cleaning mode. In the second cleaning mode, the gas is output from the pipeline to the nitrogen pressure regulating valve 24. Optionally, the gas pressure is 263KPa ± 6.8KPa. The gas passes through the first valve 100. At this time, the first port 101 and the second port 102 of the first valve 100 are opened, and thus the gas enters the second valve 200, the third port 203, and the second port 202 of the second valve 200. The port is opened and the gas enters the fuel storage device 21. Under the pressure of the gas, the cleaning liquid in the fuel storage device 21 enters the test section 600 through the second port 302 and the third port 303 of the third valve 300. The cleaning liquid enters the installed electronically controlled injector 11 from the fuel distributor 10 in the test section 600. At this time, the electronically controlled injector 11 is opened, and the cleaning liquid is sprayed from the electronically controlled injector 11. To the recovery container; the cleaning liquid in the fuel storage device 21 is sprayed, and the second cleaning process is completed. The main purpose of the second cleaning process is to discharge the cleaning liquid stored in the fuel storage device 21 and the pipeline during the first cleaning process from the simulation test device under the effect of gas pressure. This process makes the cleaning liquid pass through. The test section 600 realizes cleaning of the test section 600. It can be understood that the gas may be nitrogen, or other inert gas.

Through the first cleaning process and the second cleaning process, all components and pipelines of the simulation test device can be thoroughly cleaned. Due to the connection relationship between the first circuit and the second circuit, both normal oil storage and testing can be achieved, and The original pipeline can be used for two-way cleaning without adding additional equipment, which is convenient to use and simple to operate.

FIG. 3 is a schematic diagram of a simulation test device in an oil storage mode. Optionally, the fuel storage device 21 is a gasoline sample storage device. In the fuel storage mode, gasoline is injected into the fuel storage device 21 using the first circuit. The first container 29 contains gasoline, and triggers the oil storage mode of the controller. The simulation test device stores oil through the first circuit. The gasoline is pumped into the pipeline from the first container 29 by the pump member 23 to the third valve 300, and at this time, the first port 301 and the second port 302 of the third valve 300 are opened. Gasoline enters from the bottom of the fuel storage device 21, and after a period of injection, the gasoline completely fills the fuel storage device 21. The fifth valve is always open. The gasoline passes through the fifth valve 500 and enters the second valve 200. At this time, the first port 201 and the second port 202 of the second valve 200 are opened, and the excess gasoline passes through the second valve 200 to the second container 27. When the second container 27 is filled with oil, it is proved that the fuel storage device 21 has been filled with gasoline. This oil storage process can fill the fuel storage device 21 with gasoline for test use. The liquid used in the oil storage mode is not limited to gasoline, but may be other types of oils or liquids.

FIG. 4 is a schematic diagram of a simulation test apparatus in a test mode. In the test mode, the gas is output from the pipeline to regulate the gas pressure through the nitrogen pressure regulating valve 24. Optionally, the gas pressure is adjusted to 263KPa ± 6.8KPa. The gas passes through the first valve 100. At this time, the first port 101 and the second port 102 of the first valve 100 are opened, and thus the gas enters the second valve 200, the third port 203, and the second port 202 of the second valve 200. The port is opened, and gas enters the fuel storage device 21 from the top of the fuel storage device 21. Under the pressure of the gas, the gasoline in the fuel storage device 21 enters the test section 600 through the second port 302 and the third port 303 of the third valve 300. Gasoline enters the installed electronically controlled injector 11 from the fuel distributor 10 in the test section 600. At this time, the electronically controlled injector 11 is opened, and gasoline is injected from the electronically controlled injector 11 to the measuring device. in. After passing several cycle tests, the flow loss measurement of the electronically controlled injector was performed to evaluate the cleaning performance of the gasoline.

Optionally, a filter 28 may be further provided between the pump member 23 and the third valve 300. The filter 28 may also be disposed upstream of the pump component, that is, the pump component 23 is located between the filter 28 and the third valve 300. The filter 28 may be a filter element for a gasoline engine, or may be another component capable of realizing a filtering function. This filter can filter gasoline impurities.

The nitrogen pressure regulating device may include a gas pressure sensor (not shown), a pressure display 2, and a nitrogen pressure regulating valve 24. The pressure display 2 is connected to the gas pressure sensor, and is used to display the value of the nitrogen gas pressure. The pressure display 2 may be a liquid crystal display; the nitrogen pressure regulating valve is used to control the pressure of the gas; the knob 3 of the nitrogen pressure regulating valve 24 It is connected to the body of the nitrogen pressure regulating valve, and is used to adjust the opening size of the nitrogen pressure regulating valve. A gas pressure sensor is connected to the nitrogen pressure regulating valve, and detects the gas pressure of nitrogen during the nitrogen pressure adjustment. Optionally, the fuel storage device 21 is an oil storage tank. The body of the fuel storage device 21 is made of stainless steel. The capacity of the fuel storage device 21 may be 2 liters. It can be understood that the fuel storage device can be used to store gasoline in the test state, and can be used to store cleaning liquid in the cleaning state.

FIG. 5 is a schematic diagram of a test section of the simulation test device. Optionally, the test section 600 may include a fuel dispenser 10, a heating device, and a measuring device. The fuel distributor 10 is in communication with the third port 303 of the third valve 300. The lower end of the fuel distributor 10 is also connected to at least one electronically controlled injector 11. The heating device is used to heat the electronically controlled injector. 11 and detecting the temperature of the electronically controlled injector 11; a measuring device is disposed below the electronically controlled injector 11 and is configured to receive the liquid ejected from the electronically controlled injector 11 and measure the amount of the liquid.

With this device, the blocking tendency of the electronically controlled injector can be determined by measuring the amount of liquid flowing out of the electronically controlled injector, and a long-term automatic detection of the electronically controlled injector is realized. The device can be flushed with gasoline or a cleaning solution, and can realize multiple functions, which improves measurement efficiency and measurement accuracy.

6 to 8 are views in various directions of one embodiment of a simulation test apparatus according to the present application. The test section 600 may further include a quick connector 4, one end of the quick connector 4 is in communication with the fuel storage device 21, optionally, the simulation test device may include a cabinet, the cabinet may include a first partition 18, and the quick connector 4 One end is fixed on the first partition plate 18. The other end of the quick connector 4 communicates with the fuel distributor 10 through a nylon tube 8. When replacing the electronically controlled injector, unscrew the quick connector 4 and remove the fuel distributor to replace the electronically controlled injector. The quick connector can be used to quickly replace the electronically controlled injector. Because the nylon tube 8 has a certain flexibility, it is easy to remove and install the fuel distributor.

Optionally, the number of the electronically controlled fuel injectors 11 is two or more, and preferably, four. In this way, multiple electronically controlled injectors of the same model or different models can be tested at the same time.

FIG. 9 is a schematic diagram of an internal passage of a fuel distributor in a simulation test device. The fuel distributor 10 includes an I-shaped channel and a first channel 19. The I-shaped channel is disposed inside the fuel distributor and includes four ports. The four ports are respectively connected with four electronically controlled fuel injections. A first channel 19 is provided inside the fuel distributor 10, the first channel 19 is in communication with the center of the I-shaped channel, and an opening of the first channel 19 is provided in the fuel distribution The side wall of the device is connected with the elbow 9, and the elbow 9 communicates with the fuel storage device 21 through a pipe.

Since the elbow is located above the center of the I-shaped channel, oil can flow from the center of the I-shaped channel along each channel, so that the amount of oil distributed to the four electronically controlled injectors 11 is equal. The distance between the four ports of the I-shaped channel and the center is equal, so as to distribute the gasoline evenly.

It can be understood that different fuel distributors can be selected according to the number of electronically controlled injectors to be tested. For example, when there are two electronically controlled injectors to be tested, a fuel distribution with a straight channel can be selected. The elbow is located at the center of the inline passage, so that the amount of oil distributed to the two electronically controlled injectors through the two ports is equal; the above-mentioned fuel distributor with four ports can also be used. When there are less than four electronically controlled injectors, the other ports are closed or blocked.

FIG. 10 is a schematic structural diagram of a connection part between an electronically controlled injector and a fuel distributor. The electronically controlled injector 11 and the fuel distributor 10 are connected through a sealing ring 31 and a sleeve 30. The sealing ring 31 is provided on the top of the electronically controlled injector 11 and is sleeved on the electronically controlled injector 11. A sleeve 30 is also provided below. The upper section of the sleeve 30 is in contact with the lower section of the seal ring 31. The sleeve 30 is also sleeved on the electronically controlled injector 11. Optionally, the sleeve 30 is a brass material. The seal ring 31 is an O-shaped seal ring, and is preferably made of a rubber material. The sealing ring 31 and the sleeve 30 are directly sleeved on the electronically controlled fuel injector 11 to be integrated with the electronically controlled fuel injector. The electronically controlled injector 11 with the sealing ring 31 is inserted into four process holes of the lower end face of the fuel distributor 10 together. The fuel distributor inner hole 32 is hollow and communicates with the I-shaped channel of the fuel distributor 10. Due to the friction during the process of inserting the electronically controlled injector into the process hole, and the contact between the process hole and the electronically controlled injector 11 with the sealing ring 31 is a supersaturated contact, the sealing ring 31 is extremely easy to use in the electrically controlled injection The fuel injector 11 slides downward, which causes the seal ring 31 on the electronically controlled injector 11 to become non-horizontal, which may easily cause oil leakage. Therefore, the sleeve 30 plays a positioning role, and the upper section of the sleeve 30 is in contact with the lower section of the seal ring 31 to abut against the seal ring 31, and the seal ring 31 can be prevented from falling off or sideways.

The heating device may include: a heating block 12, a temperature sensor 7, and a temperature protection device. The heating block 12 has at least one through hole (not shown) in the vertical direction, which is used to receive the needle valve portion of the fuel electronically controlled injector 11 and heat the needle valve portion; the temperature sensor 7 It is used to measure the temperature of the heating block 12; a temperature protection device is connected to the temperature sensor and is used to cut off the power supply of the heating device when the temperature of the heating block 12 exceeds a predetermined temperature.

Optionally, the heating block 12 is a metal block, preferably an aluminum block. A circuit main board (not shown) of the heating device is connected to the temperature sensor 7 through a temperature sensor interface 5 and a temperature protection interface 6 (connection wires are not shown). The temperature sensor 7 transmits the sensing data to the circuit board through the temperature sensor interface 5. When the temperature of the heating block 12 exceeds a predetermined temperature, for example, 160 degrees Celsius, the power supply is cut off through the temperature protection interface 6. The temperature sensor 7 may be a platinum resistance sensor, for example, a Pt100 temperature sensor. The use of the temperature protection interface 6 can cut off the measurement of the temperature sensor and cut off the heating of the heating block 12 when the temperature exceeds a predetermined temperature, thereby protecting the temperature sensor and the entire circuit board.

The heating device is fixed on the second partition plate 20 of the cabinet, and the fuel distributor is connected to the heating device by screws (not shown), so that the electronically controlled fuel injector 11 is fixed between the heating device and the fuel distributor. The height of the screw can be adjusted, so that the height of the heating device and the fuel distributor can be changed, so that the electronically controlled injectors of different lengths are accommodated in the holes of the heating device.

Optionally, a deflector 14 is connected below the electronically controlled injector 11. Since the liquid sprayed from the electronically controlled injector 11 expands outward and is not sprayed vertically downward, a deflector 14 is added below the electronically controlled injector 11 so that the The liquid flows into the measuring device vertically along the guide nozzle 14 to avoid splashing to the outside of the measuring device.

Optionally, the test section may further include a lifting device 17 for carrying the measuring device and adjusting the height of the measuring device. The lifting device 17 may be a folding arm type lifting mechanism, and the lifting or lowering of the lifting device is controlled by a knob. The lifting device also adopts various methods in the prior art, such as a scissor lift mechanism, a sleeve lift mechanism, and the like. The use of a lifting device can adjust the distance of the measuring device from the electronically controlled injector 11 according to different heights of different measuring devices.

Alternatively, the measuring device may be a measuring cylinder 16 which is placed in a vertical direction in line with the needle valve portion of the electronically controlled injector 11. The measuring cylinder 16 is co-linear with the needle valve portion of the electronically controlled injector 11 so that all the liquid can flow into the measuring cylinder 16, thereby making the measurement more accurate. Each electronically controlled injector 11 corresponds to a measuring cylinder 16 to measure the volume of the liquid ejected from the electronically controlled injector 11. With the measuring cylinder 16, the liquid sprayed from each of the electronically controlled injectors 11 can be measured individually, and the measurement results are more targeted. Optionally, the capacity of the graduated cylinder 16 is 100 ml.

Alternatively, the measuring device may be a beaker. The beaker is used to receive the amount of liquid sprayed from the electronically controlled injector 11. The beaker can be used to receive the oil from the electronically controlled injector 11 during the cycle test; it can also be used when it is not necessary to accurately measure the fuel injection amount of each electronically controlled injector 11. The fuel injection amounts of all the electronically controlled injectors 11 are measured, so that the average value of the fuel injection amounts of all the electronically controlled injectors 11 can be obtained, so as to further analyze the performance of this type of electronically controlled injectors.

The simulation test device may further include an inlet 13 and an outlet 15, and the inlet 13 and the outlet 15 are respectively connected to the fuel storage device 21. The inlet 13 is used to inject liquid into the fuel storage device 21, and the outlet 15 is used to discharge excess liquid. When the fuel storage device 21 is filled with liquid, liquid flows out from the outlet 15 to prove that the liquid has filled the fuel storage device 21. The inlet 13 is connected to the pump member 23 through a nylon tube 22.

The various components of the simulation test device can be contained in a cabinet. The cabinet may include a first partition 18, a second partition 20, and a cabinet door. The door is made of transparent material. A fuel distributor, a heating block 12, an electronically controlled fuel injector 11, a measuring device and a lifting device are arranged between the second partition and the cabinet door. The electronically controlled injector control interface 1, temperature sensor interface 5, temperature protection interface 6, inlet 13, and outlet 15 are arranged on the second partition. The panel next to the door is provided with a pressure indicator and a knob. When the pressure does not meet the standard, the knob can be used to fine-tune the pressure. A fuel storage device, a valve, a pump component, a nylon tube, a fuel quick connector, a pipeline, a pressure transmitter 26, a nitrogen pressure regulating valve, etc. are arranged behind the second partition. The fuel is sucked into the fuel storage device 21 through the fuel quick connector and the nylon pipe through the pump component under the action of the components. When the fuel storage device 21 is full, the fuel overflows the top interface of the fuel storage device 21 and flows out from the outlet through the pipeline. Electronically controlled injector control interface 1 is a connector. One end is connected to the control line of the electronically controlled injector. The other end is connected to the control device of the electronically controlled injector. The control device is used to control the needle valve of the electronically controlled injector. The opening or closing of the part.

The present application discloses a simulation test device, which uses a heat source to heat and maintain an electronically controlled injector, and simulates the temperature of the electronically controlled injector during a driving test. Before each test, an electronically controlled injector that meets certain plugging requirements is selected. The electronically controlled injector is cleaned and installed on the substrate of the heating device, and the fuel storage device is filled with test gasoline. During each cycle, gasoline enters the fuel distributor under the effect of nitrogen pressure, supplies fuel to four electronically controlled injectors, releases gasoline for a predetermined time through the electronically controlled injectors, and then uses the heating device to control the electronically controlled injectors. The needle valve part is heated. When the temperature of the needle valve part reaches the test requirements, heat is maintained by the heating device, and after a predetermined time cooling process, the control device opens the needle valve part of the electronically controlled injector. The oil tank flows out and flows into four measuring cylinders placed on the lifting device to complete a cycle. During the test, during the first cycle, the gasoline is released by the electronically controlled injector for a predetermined time to obtain the first flow data of the electronically controlled injector. After several cycles of testing, the number of electronically controlled injectors is measured and calculated. Two flow data, and then measure and calculate the third flow data of the electronically controlled injector after several cycle tests. After the test is completed, the clogging rate is determined according to the change of the three flow data of each electronically controlled injector.

The simulation test device disclosed in this application can test the coking rate tendency of the electronic hole type electronically controlled injector, and can use the original pipeline to perform two-way cleaning of various components and pipelines of the device, so that the pipelines inside the device And components can be fully cleaned before the test, thereby reducing the risk of contamination of the test oil sample and ensuring the accuracy of the test data. This device can test and evaluate multiple types of electronically controlled injectors. Existing equipment can only test a specific type of electronically controlled injectors. Therefore, the simulation test device disclosed in this application has a wider application range. More features.

The heating plate and the fuel distributor in the heating block are fixed by two threaded screws. The screw is two independent screws. The screw is directly inserted into the heater through a process through hole above the fuel distributor, and the screw is screwed by a wrench to fix the fuel distributor and the heating plate. The structure of the fuel distributor and the fixing method of the heating plate of the present application are different from those of the current equipment, and can test multiple electronically controlled injectors at the same time, which is more efficient. The fuel dispenser of the present application has a function of length adjustment.

The fuel dispenser of the present application has a function of length adjustment. Because the specifications of the electronically controlled injector and the specifications made by various auto parts manufacturers are different, it is necessary to adapt to different injectors for testing. In general, the injectors have the same diameter but different lengths, so they are designed to adjust height. Use two long internal hexagonal threaded rods, insert straight from the fuel distributor into the threaded through hole into the heating plate, and tighten the screws with the hexagonal wrench to fix the fuel distributor and heating plate together. Due to the difference in the length of the injector, the number of turns of the screw tightening is also different. In this way, the electronically controlled injector between the fuel distributor and the heating plate is fixed, so that the same set of devices can be adapted to uncommon length and Specifications of electronically controlled injectors.

In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The directions or positional relationships indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or The positional relationship is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, structure and operation in a specific orientation, and therefore cannot be understood as a limitation on this application.

In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the order or number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless it is specifically and specifically defined otherwise.

In this application, the terms "installation," "connected," "connected," and "fixed" should be understood broadly unless otherwise specified and limited, for example, they may be fixed connections or removable connections Or integrated; it can be mechanical or electrical; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

At this point, those skilled in the art should realize that, although a number of exemplary embodiments of the present application have been shown and described in detail herein, without departing from the spirit and scope of the present application, one can still make disclosure based on the present application. The content directly determines or derives many other variations or modifications consistent with the principles of this application. Therefore, the scope of this application should be understood and deemed to cover all these other variations or modifications.

Claims (15)

A simulation test device includes a nitrogen pressure regulating device, a first valve, a second valve, a fuel storage device, a third valve, a pump component, a test section, and a controller, wherein the first valve and the nitrogen pressure The regulating device is in communication, the first valve is in communication with the second valve, the first valve is in communication with the outlet; the second valve is also in communication with the fuel storage device, and the second valve is also in communication with the outlet The third valve communicates with the pump component, the fuel storage device, and the test section; the controller is connected with the first valve, the second valve, and the third valve, respectively, in the Under the control of the controller, the simulation test device forms a first circuit and a second circuit, and the first circuit includes the pump component, the third valve, the fuel storage device, and the second valve. And the outlet; the second circuit includes the nitrogen pressure regulating device, the first valve, the second valve, the fuel storage device, the third valve, and the test section. The simulation test apparatus according to claim 1, wherein: A first port of the first valve is in communication with the nitrogen pressure regulating device, a second port of the first valve is in communication with a third port of the second valve, and a third port of the first valve is in communication with an outlet Connected A first port of the second valve is in communication with a third port of the first valve, a second port of the second valve is in communication with the fuel storage device, and a third port of the second valve is in communication with the The second port of the first valve is in communication; and A first port of the third valve is in communication with the pump component, a second port of the third valve is in communication with the fuel storage device, and a third port of the third valve is in communication with the test section. The simulation test device according to claim 2, wherein the first port of the first valve, the first port of the second valve, and the first port of the third valve are normally closed ports, and the first The second port of a valve, the second port of the second valve, and the second port of the third valve are normally open ports; the third port of the first valve, and the third port of the second valve The third port of the third valve is a common port. The simulation test apparatus according to any one of claims 1 to 3, wherein the controller is configured to inject liquid through the pump member and the third valve in a first cleaning mode or an oil storage mode. It is inside the fuel storage device and is discharged through the second valve and the outlet. The simulation test device according to any one of claims 1 to 4, wherein the controller is configured to inject a gas into a gas station through a nitrogen pressure regulating device and the first valve in a second cleaning mode or a test mode. The fuel storage device, so that the liquid in the fuel storage device is discharged from the test portion through the third valve. The simulation test apparatus according to claim 1, wherein the test section includes: A fuel distributor in communication with a third port of the third valve, and a lower end surface of the fuel distributor is further connected to at least one electronically controlled injector; A heating device for heating the electronically controlled injector and detecting a temperature of the electronically controlled injector; and A measuring device is disposed below the electronically controlled fuel injector, and is configured to receive a liquid ejected from the electronically controlled fuel injector and measure an amount of the liquid. The simulation test device according to claim 6, wherein a diversion nozzle is connected below the electronically controlled injector. The simulation test device according to claim 6, wherein the nitrogen pressure adjusting device comprises: Nitrogen pressure regulating valve, used to control the magnitude of nitrogen pressure; A gas pressure sensor connected to the nitrogen pressure regulating valve to detect the gas pressure of nitrogen while performing nitrogen pressure adjustment; and A display connected to the gas pressure sensor is used to display the value of the gas pressure of nitrogen. The simulation test device according to claim 6, wherein the test section further comprises a lifting device for carrying the measurement device and adjusting a height of the measurement device. The simulation test device according to claim 6, wherein the measuring device is a measuring cylinder that is placed in a vertical direction in line with a needle valve portion of the electronically controlled injector. The simulation test device according to claim 6, wherein the fuel distributor comprises: An I-shaped channel is provided inside the fuel distributor and includes four ports, and the four ports are in communication with four electronically controlled injectors; An elbow communicating with the center of the I-shaped channel; and An inlet is connected to the elbow, and the inlet communicates with the fuel storage device through a pipeline. The simulation test device according to claim 6 or 11, wherein the test section further comprises a quick connector, one end of the quick connector is in communication with the fuel storage device, and the other end is in communication with the fuel distributor through a nylon tube. . The simulation test device according to claim 6 or 11, wherein the heating device comprises: A heating block having at least one through-hole in a vertical direction, the through-hole being used to receive a needle valve portion of the electronically controlled injector and heat the needle valve portion; A temperature sensor for measuring the temperature of the heating block; and A temperature protection device is connected to the temperature sensor and is used to cut off the power supply of the heating device when the temperature of the heating block exceeds a predetermined temperature. The simulation test device according to claim 6, wherein a sealing ring and a sleeve are provided between the electronically controlled injector and the fuel distributor, and the sealing ring is sleeved on the electronically controlled injector. At the top, the sleeve is disposed below the seal ring and is sleeved on the electronically controlled injector. The simulation test apparatus according to claim 1, further comprising a filter provided between the pump member and the third valve or provided upstream of the pump member.

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