CN210509452U - Oil sprayer performance measuring device - Google Patents
Oil sprayer performance measuring device Download PDFInfo
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- CN210509452U CN210509452U CN201921640950.5U CN201921640950U CN210509452U CN 210509452 U CN210509452 U CN 210509452U CN 201921640950 U CN201921640950 U CN 201921640950U CN 210509452 U CN210509452 U CN 210509452U
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- fuel injector
- oil
- common rail
- injector
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Abstract
The utility model discloses a sprayer performance measurement device belongs to and measures technical field. The fuel injector performance measuring device is used for measuring the circulation capacity of a fuel injector and comprises a power circulation assembly, a fuel common rail and a measuring assembly; the power cycle assembly comprises a fuel pump for providing required fuel for a fuel injector; the fuel common rail is provided with at least two interfaces communicated with the fuel injector, and one end of the fuel common rail is communicated with the fuel pump; the measuring component is connected with the fuel pump and used for measuring fuel circulation of the fuel injector and recycling fuel. The utility model provides a fuel injector performance measuring device, which can simultaneously measure at least two fuel injectors by arranging at least two interfaces communicated with the fuel injector of a measured piece on a fuel common rail; the power circulation assembly provides power for measurement, the measurement assembly completes an actual measurement task, and the three modules work simultaneously to realize simultaneous measurement of a plurality of measured oil injectors.
Description
Technical Field
The utility model relates to a measure technical field, especially relate to a sprayer performance measurement device.
Background
Along with the improvement of the performance of the diesel engine and the stricter emission control regulations, higher requirements are put forward on a fuel injection system of the diesel engine, and the fuel injection system is used as a fuel injector of a fuel injection core to directly influence the fuel injection capability and the subsequent combustion process in the engine; in order to optimize the design of the oil injector and reduce the flow resistance of the oil injector, the flow capacity of the oil injector needs to be accurately measured on line.
At present, a single injection instrument is mostly adopted for measuring the circulation capacity of an oil injector, but the single injection instrument can only measure the actual circulation capacity of one oil injector at a time, so that the measuring process is inconvenient, and the production efficiency is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sprayer performance measurement device can accurately measure the circulation ability of a plurality of sprayers simultaneously, improves production efficiency.
In order to realize the purpose, the utility model adopts the following technical scheme:
a fuel injector performance measuring apparatus for measuring a flow capability of a fuel injector includes,
the power cycle assembly comprises a fuel pump for providing required fuel for a fuel injector;
the fuel common rail is provided with at least two interfaces communicated with the fuel injector, and one end of the fuel common rail is communicated with the fuel pump;
and the measuring component is connected with the fuel pump and used for measuring the fuel circulation of the fuel injector and recovering the fuel.
Optionally, the measuring assembly includes a first metering member disposed at an oil inlet of the oil injector and a second metering member disposed at an oil outlet of the oil injector.
Optionally, the second gauge is located higher than the fuel pump and the height of the line from the second gauge to the fuel pump decreases progressively.
Optionally, the measurement assembly further comprises a first pressure sensor disposed on the fuel injector and a second pressure sensor disposed on the fuel common rail, and/or a temperature sensor disposed on the fuel common rail.
Optionally, the power cycle assembly further includes a first high-pressure oil pipe and a check valve, the first high-pressure oil pipe is disposed between an oil outlet of the fuel pump and an oil inlet of the fuel common rail, the check valve is disposed on the first high-pressure oil pipe, and an opening direction of the check valve faces the fuel common rail.
Optionally, the power cycle assembly further includes a second high-pressure oil pipe and a control valve, the second high-pressure oil pipe is disposed between the interface and an oil inlet of the oil injector, the control valve is disposed inside the oil injector, and the control valve is connected to the second high-pressure oil pipe.
Optionally, the power cycle assembly further includes a first oil return pipe and an unloading valve, the first oil return pipe is disposed between an oil outlet of the fuel common rail and an oil inlet of the fuel pump, the unloading valve is disposed on the first oil return pipe and is disposed near a top of the fuel common rail, and an outlet of the unloading valve is higher than an oil inlet of the fuel pump.
Optionally, the power cycle assembly further comprises a second return line disposed between the fuel outlet of the fuel injector and the fuel inlet of the fuel pump, and a fuel filter disposed on the second return line.
Optionally, a conversion joint and/or a plug are arranged at the interface, and the conversion joint is used for connecting the interface and the fuel injector; when the interface is not used, the plug is installed at the interface.
Optionally, the fuel injector performance measuring device further comprises an electronic control unit, the electronic control unit is electrically connected with the measuring assembly and receives and judges data measured by the measuring assembly, and the electronic control unit is electrically connected with the power circulation assembly and controls the working state of the power circulation assembly.
The utility model has the advantages that:
the utility model provides a sprayer performance measuring device is used for measuring the circulation ability of sprayer, through being provided with at least two interfaces that communicate with sprayer on the fuel rail, can measure at least two sprayers simultaneously; the power circulation assembly provides power for measurement, the measurement assembly completes an actual measurement task, and the three modules work simultaneously to realize simultaneous measurement of the plurality of fuel injectors.
Drawings
Fig. 1 is a working schematic diagram of a fuel injector performance measuring device provided by the embodiment of the present invention.
In the figure:
1-a power cycle assembly; 2-an electronic control unit; 3-a fuel common rail; 4-a measuring assembly; 5-an oil sprayer;
11-a fuel pump; 12-a one-way valve; 13-an unloading valve; 14-an oil filter; 15-a control valve; 16-a first high pressure tubing; 17-a second high pressure fuel line; 18-a first oil return pipe; 19-a second oil return pipe;
31-a crossover joint; 32-plug;
41-a first gauge; 42-a second gauge; 43-a first pressure sensor; 44-a temperature sensor; 45-a second pressure sensor;
51-injector body; 52-nozzle.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
With the improvement of the performance of the diesel engine and the stricter emission control regulations, higher requirements are put forward on a fuel injection system of the diesel engine, and a fuel injector 5 serving as a fuel injection core directly influences the fuel injection capability and the subsequent combustion process in the engine. In order to optimize the design of the fuel injector 5 and reduce the flow resistance thereof, accurate on-line measurement of the flow capacity of the fuel injector 5 is urgently required. At present, a single injection instrument is mostly adopted for measuring the flow capacity of the oil injector 5, but the single injection instrument can only measure the actual flow capacity of one oil injector 5 at a time, the measuring process is inconvenient, and the production efficiency is low.
In order to solve the above problem, the present embodiment provides an injector performance measuring apparatus for measuring the flow capacity of an injector 5, which includes a power cycle assembly 1, a fuel common rail 3, and a measuring assembly 4. The power cycle assembly 1 comprises a fuel pump 11 for supplying fuel required by a fuel injector 5; the fuel common rail 3 is provided with at least two interfaces communicated with the fuel injector 5, and one end of the fuel common rail 3 is communicated with the fuel pump 11; the measuring assembly 4 is connected to the fuel pump 11 for measuring the fuel flow through the fuel injector 5 and for recovering fuel. At least two interfaces communicated with the oil injectors 5 are arranged on the fuel oil common rail 3, so that at least two oil injectors 5 can be measured simultaneously; the power circulation assembly 1 provides power for measurement, the measurement assembly 4 completes actual measurement tasks, and the three modules work simultaneously to realize simultaneous measurement of the plurality of fuel injectors 5.
Optionally, a plurality of interfaces are arranged on the fuel common rail 3, a conversion connector 31 and/or a plug 32 are arranged at the interfaces, and the conversion connector 31 is used for connecting the interfaces and the fuel injector 5; the plug 32 is mounted at the interface when the interface is not in use. In this embodiment, as shown in fig. 1, the fuel common rail 3 is provided with five interfaces, and is provided with three adapter connectors 31 and two spare plugs 32, the three interfaces are respectively connected with the fuel injector 5 through the adapter connectors 31, and the other two interfaces are respectively provided with the plugs 32. Optionally, the volume of the fuel inside the fuel common rail 3 is large, so that the technical requirement that the pressure fluctuation inside the fuel common rail 3 is not more than 1% when the plurality of injectors 5 work simultaneously is met. In this embodiment, the fuel common rail 3 has a capacity of twenty liters and can bear a pressure of one thousand, two hundred and fifty bars. In the practical application process, the types of the oil injectors 5 may be different, the interfaces of the corresponding oil injectors 5 are different, and oil pipes of corresponding specifications connected with the oil injectors 5 are selected according to different interfaces of the oil injectors 5, so that the flow capacity measurement of more types of the oil injectors 5 is met.
In order to complete various control functions, the fuel injector performance measuring device further comprises an electronic control unit 2, the electronic control unit 2 is electrically connected with the measuring assembly 4 and receives and judges data measured by the measuring assembly 4, and the electronic control unit 2 is electrically connected with the power circulation assembly 1 and controls the working state of the power circulation assembly 1.
As shown in fig. 1, in the present embodiment, the power cycle assembly 1 includes a first high pressure fuel pipe 16, a second high pressure fuel pipe 17, a first return fuel pipe 18, and a second return fuel pipe 19, so that the fuel injector 5 performance measuring device forms a closed loop for the flow of fuel. Wherein:
the first high-pressure oil pipe 16 is arranged between an oil outlet of the fuel pump 11 and an oil inlet of the fuel common rail 3; optionally, the power cycle assembly 1 comprises a check valve 12, the check valve 12 is arranged on the first high-pressure oil pipe 16, and the opening direction of the check valve 12 faces the fuel common rail 3, so that on one hand, pressure impact is prevented from influencing the normal operation of the fuel pump 11; on the other hand, when the fuel pump 11 does not work, the fuel flows back to the oil outlet of the fuel pump 11 through the first high-pressure oil pipe 16.
The second high-pressure oil pipe 17 is arranged between the interface and the oil inlet of the oil injector 5; optionally, the power cycle assembly 1 comprises a control valve 15, the control valve 15 being arranged inside the fuel injector 5, the control valve 15 being connected to the second high pressure conduit 17. In this embodiment, signals such as the opening timing and the duration of the control valve 15 are sent by the electronic control unit 2, so that the fuel injector 5 injects fuel.
The first oil return pipe 18 is arranged between an oil outlet of the fuel common rail 3 and an oil inlet of the fuel pump 11; optionally, the power cycle assembly 1 includes an unloading valve 13, the unloading valve 13 is disposed on the first oil return pipe 18, the unloading valve 13 is disposed near the top of the fuel common rail 3, an outlet position of the unloading valve 13 is higher than an oil inlet position of the fuel pump 11, and the function of the unloading valve 13 is that when the system pressure reaches an opening pressure of the unloading valve 13, the fuel common rail 3 is unloaded, and fuel flows into the fuel pump 11 from the fuel common rail 3 through the gravity action of the fuel; when the system pressure falls to the closing pressure of the unloading valve 13, the unloading valve 13 is closed. The unloading valve 13 is connected with the fuel pump 11 through the first oil return pipe 18, and the unloading valve 13 and the fuel pump 11 are controlled by the electronic control unit 2, so that the pressure regulation and safe discharge of the fuel common rail 3 are realized. In the present embodiment, the unloading valve 13 is a proportional unloading valve.
The second oil return pipe 19 is arranged between the oil outlet of the oil injector 5 and the oil inlet of the fuel pump 11; optionally, the power cycle assembly 1 further comprises an oil filter 14, the oil filter 14 being arranged on the second return line 19 to prevent fuel with impurities from flowing into the fuel pump 11.
The flow capacity of the fuel injector 5 is related to the internal flow path geometry of the fuel injector 5, the fuel injection pressure difference at the two ends of the oil inlet and the oil outlet, and the medium density.
Optionally, the measuring assembly 4 includes a first metering element 41 and a second metering element 42, the first metering element 41 is disposed at an oil inlet of the fuel injector 5, the second metering element 42 is disposed at an oil outlet of the fuel injector 5, and the injection flow to the fuel injector 5 from the first metering element 41 and the second metering element 42 is determined, so as to determine the influence of the internal flow passage geometry on the flow capacity of the fuel injector 5. Alternatively, the second gauge 42 is positioned above the fuel pump 11 and the height of the line from the second gauge 42 to the fuel pump 11 is gradually reduced to facilitate fuel recycling to the fuel pump 11 by gravity. The electronic control unit 2 receives the measurement data of the first metering element 41 and the second metering element 42, and obtains more accurate information of the fuel injection flow rate through comparison and correction. Alternatively, the first metering member 41 is a transient flow based measuring device and the second metering member 42 is a fuel metering unit.
In the present embodiment, the first metering element 41 is disposed on the second high pressure fuel pipe 17 to measure the transient flow rate on the second high pressure fuel pipe 17, and the second metering device 42 is mounted on the second fuel return pipe 19, and after the fuel is sprayed from the injector 5 to the second metering device 42, the fuel flows back to the fuel pump 11 through the second fuel return pipe 19 to be recovered.
Optionally, in order to measure the fuel pressure difference between the two ends of the oil inlet and the oil outlet of the fuel injector 5, the measuring assembly 4 further comprises a first pressure sensor 43 and a second pressure sensor 45. In particular, a first pressure sensor 43 is provided on the injector 5 for measuring the fuel pressure inside the cavity of the injector 5. The fuel injector comprises a fuel injector body 51 and a nozzle 52 arranged on the fuel injector body 51, and the spray hole schemes on the nozzle 52 of different fuel injectors 5 are different. In order to optimize the design of the fuel injector 5 and reduce the flow resistance thereof, it is imperative that the flow capacity of the injector body 51 and the nozzle 52 be measured accurately on-line. In this embodiment, the first pressure sensor 43 is installed on the nozzle 52, and the pressure difference between the first pressure sensor 43 and the atmospheric pressure is the fuel injection pressure difference at both ends of the nozzle 52, so as to measure the flow capacity of the nozzle 52. Optionally, the first pressure sensor 43 is a miniature pressure sensor. The second pressure sensor 45 is arranged on the fuel common rail 3, and the second pressure sensor 45 and the first pressure sensor 43 are used for measuring the fuel injection pressure difference at two ends of the fuel injector body 51 so as to measure the flow capacity of the fuel injector body 51; by measuring the fuel injection pressure difference of the fuel injector body 51 and the nozzle 52 respectively, the fuel injection pressure difference at two ends of the oil inlet and the oil outlet of the fuel injector 5 is comprehensively obtained, and the accuracy and the reliability of the measurement result are improved.
In this embodiment, the measuring assembly 4 further includes a temperature sensor 44, and the temperature sensor 44 is disposed on the fuel common rail 3 and is used for measuring the fuel temperature, so as to obtain corresponding fuel density information and avoid an error caused by the influence of the temperature on the fuel density.
The flow rate information obtained by the first and second metering members 41 and 42; the pressure difference between the two ends of the injector body 51 measured by the second pressure sensor 45 and the first pressure sensor 43; the pressure difference across the nozzle 52 measured by the first pressure sensor 43 and atmospheric pressure; and the fuel temperature information measured by the temperature sensor 44, on the basis of which the electronic control unit 2 can calculate the flow capacity of the injector 5 comprehensively, making the performance measurement result of the injector 5 more accurate.
The measuring processes of the flow capacity of the plurality of fuel injectors 5 on the fuel injector performance measuring device are consistent, and the working process of the fuel injector 5 performance measuring device is described in the embodiment by taking the flow capacity measurement of one fuel injector 5 as an example:
firstly, fuel in the fuel pump 11 enters the fuel common rail 3 through a first high-pressure fuel pipe 16 and a check valve 12;
secondly, the fuel common rail 3 is communicated with the fuel injector 5 through the adapter 31 and the second high-pressure fuel pipe 17, and the fuel enters the fuel injector 5; the second pressure sensor 45 measures the fuel pressure at the inlet end of the fuel injector 5, the first metering piece 41 on the second high-pressure fuel pipe 17 measures the fuel flow at the inlet end of the fuel injector 5, the temperature sensor 44 measures the fuel temperature, and the second pressure sensor 45, the first metering piece and the temperature sensor 44 respectively feed back data information to the electronic control unit 2;
thirdly, the control valve 15 in the fuel injector 5 controls the fuel injector 5 to inject fuel to a second metering element 42 arranged on a second oil return pipe 19 according to a signal sent by the electronic control unit 2, the second metering element 42 measures the fuel flow at the outlet end of the fuel injector 5, meanwhile, a first pressure sensor 43 measures the fuel pressure at the outlet end of the fuel injector 5, and the second metering element and the first pressure sensor respectively feed back data information to the electronic control unit 2;
fourthly, the fuel injected from the fuel injector 5 is returned to the fuel pump 11 through the second metering member 42 and the second return pipe 19;
the electronic control unit 2 obtains the fuel flow, the fuel injection pressure difference and the fuel temperature information of the fuel injector 5 according to the data collected by the measuring component 4, so that the flow capacity of the fuel injector 5 is obtained.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A fuel injector performance measuring device for measuring the flow capacity of a fuel injector (5), characterized by comprising,
a power cycle assembly (1) comprising a fuel pump (11) for supplying the fuel injector (5) with the required fuel;
the fuel oil common rail (3) is provided with at least two interfaces communicated with the fuel injector (5), and one end of the fuel oil common rail (3) is communicated with the fuel pump (11);
and the measuring assembly (4) is connected with the fuel pump (11) and is used for measuring the fuel circulation of the fuel injector (5) and recovering the fuel.
2. The fuel injector performance measuring device according to claim 1, characterized in that the measuring assembly (4) includes a first metering member (41) and a second metering member (42), the first metering member (41) being provided at an oil inlet of the fuel injector (5), the second metering member (42) being provided at an oil outlet of the fuel injector (5).
3. The fuel injector performance measuring device according to claim 2, characterized in that the second metering member (42) is located higher than the fuel pump (11), and a height of a line from the second metering member (42) to the fuel pump (11) is gradually reduced.
4. A fuel injector performance measuring apparatus according to claim 2, characterized in that the measuring assembly (4) further includes a first pressure sensor (43) provided on the fuel injector (5) and a second pressure sensor (45) provided on the fuel common rail (3), and/or a temperature sensor (44) provided on the fuel common rail (3).
5. The fuel injector performance measuring device according to claim 1, characterized in that the power cycle assembly (1) further includes a first high-pressure fuel pipe (16) and a check valve (12), the first high-pressure fuel pipe (16) is disposed between an oil outlet of the fuel pump (11) and an oil inlet of the fuel common rail (3), the check valve (12) is disposed on the first high-pressure fuel pipe (16), and an opening direction of the check valve (12) is directed toward the fuel common rail (3).
6. The fuel injector performance measuring device according to claim 1, characterized in that the power cycle assembly (1) further comprises a second high pressure fuel line (17) and a control valve (15), the second high pressure fuel line (17) being arranged between the interface and the fuel inlet of the fuel injector (5), the control valve (15) being arranged inside the fuel injector (5), the control valve (15) being connected to the second high pressure fuel line (17).
7. The fuel injector performance measuring device according to claim 1, characterized in that the power cycle assembly (1) further includes a first fuel return pipe (18) and an unloading valve (13), the first fuel return pipe (18) is disposed between an oil outlet of the fuel common rail (3) and an oil inlet of the fuel pump (11), the unloading valve (13) is disposed on the first fuel return pipe (18), and the unloading valve (13) is disposed near a top of the fuel common rail (3), and an outlet position of the unloading valve (13) is higher than an oil inlet position of the fuel pump (11).
8. The fuel injector performance measuring device according to claim 1, characterized in that the power cycle assembly (1) further includes a second oil return pipe (19) and an oil filter (14), the second oil return pipe (19) being provided between an oil outlet of the fuel injector (5) and an oil inlet of the fuel pump (11), the oil filter (14) being provided on the second oil return pipe (19).
9. The fuel injector performance measuring device according to claim 1, characterized in that an adapter (31) and/or a plug (32) is/are arranged at the interface, the adapter (31) being used for connecting the interface and the fuel injector (5); when the interface is not used, the plug (32) is arranged at the interface.
10. The fuel injector performance measuring device according to claim 1, characterized in that the fuel injector (5) performance measuring device further includes an electronic control unit (2), the electronic control unit (2) being electrically connected to the measuring assembly (4) and receiving and judging data measured by the measuring assembly (4), the electronic control unit (2) being electrically connected to the power cycle assembly (1) and controlling the operating state of the power cycle assembly (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921640950.5U CN210509452U (en) | 2019-09-27 | 2019-09-27 | Oil sprayer performance measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921640950.5U CN210509452U (en) | 2019-09-27 | 2019-09-27 | Oil sprayer performance measuring device |
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| CN210509452U true CN210509452U (en) | 2020-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529318A (en) * | 2019-09-27 | 2019-12-03 | 中船动力研究院有限公司 | A kind of fuel injector device for measuring properties |
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2019
- 2019-09-27 CN CN201921640950.5U patent/CN210509452U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529318A (en) * | 2019-09-27 | 2019-12-03 | 中船动力研究院有限公司 | A kind of fuel injector device for measuring properties |
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