WO2020197051A1

WO2020197051A1 - Injector inspection apparatus using mass

Info

Publication number: WO2020197051A1
Application number: PCT/KR2019/018377
Authority: WO
Inventors: 서진영
Original assignee: 서진영
Priority date: 2019-03-27
Filing date: 2019-12-24
Publication date: 2020-10-01
Also published as: KR102115744B1

Abstract

The present invention relates to an injector inspection apparatus using mass, the apparatus using a mass flowmeter so as to enable the amount of test oil sprayed from an injector to be measured, and disclosed is the injector inspection apparatus comprising: a housing; an injector mounting part to which the injector is connected, and which includes a common rail for receiving high-pressure test oil and discharging same to the injector; a spray hose of which one end is connected to a nozzle of the injector; a hose holder which is fixed to the housing and which fixes the spray hose; a measuring part which is provided at the lower side of the hose holder and which measures the mass of the test oil sprayed from the spray hose; and a control part for controlling the spray of the test oil by the injector and calculating the amount of the test oil sprayed by the injector, wherein the other end of the spray hose is spaced from the measuring part so that there is no influence of the temperature on a measurement value, and thus more accurate measurement is possible.

Description

Injector inspection device using mass

The present invention relates to an injector inspection apparatus, and more particularly, to an injector inspection apparatus using a mass capable of measuring the amount of test oil injected from the injector using a mass flow meter.

An internal combustion engine refers to an engine that converts heat energy into mechanical energy by burning fuel inside the engine, and is used as a power source for vehicles. To explain the driving process of the internal combustion engine in more detail, when high-pressure fuel is injected through an injector connected to the common rail into the fuel chamber of the engine, it causes an explosion through compression ignition or spark ignition, pushing the piston located under the fuel chamber. Mechanical energy is obtained by performing piston motion. However, if fuel injection is not performed smoothly, fuel economy decreases, output decreases, and furthermore, the driving of the internal combustion engine may be stopped, so the management of the injector is important, while a normal vehicle has a number of cylinders and injectors. There is a problem in that the entire injector has to be replaced because it is difficult to identify the defective injector when a situation in which an abnormality of the injector is suspected occurs.

As a prior art for solving this problem, Korean Patent Publication No. 10-1016566, “Injector inspection apparatus and a method for measuring injection amount using the same” have been disclosed. In the prior art, as shown in Figs. 1 to 2, each injector 220 is mounted on the injector holder 200, connected to the common rail 300, and then operated the injector inspection device 1000 to operate the injection chamber. (400) Inject test oil into the interior. The test oil injected into the injection chamber 400 flows into the flow measurement cylinder 530 of the flow measurement unit 500 through the discharge hole 410 formed at the bottom of the injection chamber 400, and the flow measurement cylinder 530 By grasping the oil level position of the test oil that has flowed into the flow measurement cylinder 530 through the flow measurement sensor 540 disposed on the upper side, the amount of test oil injected from each injector 220 is determined to determine whether or not the injector is faulty. I did it.

However, the volume of the test oil changes according to the temperature, and the above-described method has a problem that the temperature affects the determination of whether or not the injector has a failure. Accordingly, there is an urgent need to develop an injector inspection device capable of more accurately determining whether or not an injector has a failure.

The present invention has been conceived to solve the above problems, and an object of the present invention is to provide an injector inspection apparatus capable of more accurately determining whether or not an injector has a failure.

On the other hand, the object of the present invention is not limited to the object mentioned above, and other objects not mentioned will be clearly understood from the following description.

Injector inspection apparatus using the mass of the present invention, the housing; A hydraulic pressure generator that receives the test oil from the storage tank and increases the pressure of the test oil; An injector mounting unit including a common rail connected to the injector and supplied with high pressure test oil from the hydraulic pressure generator and discharged to the injector; An injection hose having one end connected to the nozzle of the injector; A hose holder fixed to the housing and fixing the spray hose; A measuring unit provided under the hose holder and including a spray chamber for receiving the test oil sprayed from the spray hose and a first scale disposed below the spray chamber to measure the mass of the test oil sprayed into the spray chamber; A control unit controlling the injection of test oil of the injector and calculating an injection amount of test oil of the injector from the mass measured by the measuring unit; And a monitoring unit for displaying the amount of test oil injection calculated by the control unit, wherein the other end of the injection hose is spaced apart from the measurement unit.

In addition, in the injection chamber, a discharge hole is formed at the lower end, and the measurement unit is provided between the injection chamber and the first scale, and the test oil accommodated in the injection chamber is externally opened by opening and closing the discharge hole according to the control of the control unit. It further comprises a solenoid valve to be discharged to, and the control unit is characterized in that when controlling the injector to inject the test oil, the solenoid valve controls the discharge hole to close.

In this case, the control unit is characterized in that the control unit controls the injector to inject the test oil and calculates the injection amount of the test oil by the injector from the mass of the test oil measured by the first balance after a set time has elapsed.

And, the control unit, after calculating the test oil injection amount of the injector, characterized in that the control so that the solenoid valve opens the discharge hole.

In addition, the measurement unit includes a first measurement module including the injection chamber and the first scale, and a second scale disposed below the storage tank and measuring the mass of the test oil accommodated in the storage tank. Including a module, the control unit, the mass of the test oil measured by the first balance after the injection of the test oil by the injector and the mass difference value of the test oil measured by the second balance before and after the injection of the test oil by the injector are compared with each other Thus, when a difference value between each other is greater than or equal to a preset reference error, control is performed to display an abnormality measurement notification on the monitoring unit.

And the measurement unit, the injection chamber, a first measurement module including the first balance and a solenoid valve, a cylinder installed outside the housing and marked with a scale on the outer surface, and test oil discharged to the outside through the solenoid valve. It characterized in that it comprises a discharge bucket for accommodating the and a third measuring module including a transfer hose for transferring the test oil accommodated in the discharge bucket to the cylinder.

The injector inspection apparatus using the mass of the present invention having the above configuration has the effect of allowing more accurate measurement because there is no influence of the measured value according to the temperature by measuring the injection amount of the injector as a mass value through the first balance.

In addition, there is an effect of minimizing the error by calculating the amount of test oil injected through the value measured by the first balance after the other end of the injection hose has an arrangement structure and a setting time apart from the measurement unit.

In addition, through the configuration of a solenoid valve that opens and closes automatically, there is an effect that continuous inspection is possible without a separate operation.

In addition, there is an effect of determining the reliability of a value measured by the first measurement module through the second measurement module.

In addition, there is an effect that the operator can check the injection amount through the third measurement module, thereby improving inspection reliability.

1 is a perspective view showing a conventional injector inspection apparatus.

2 is a side cross-sectional view showing a flow rate measurement unit included in a conventional injector inspection apparatus.

3 is a front view of an injector inspection apparatus using a mass according to a first embodiment of the present invention.

4 to 5 are side cross-sectional views illustrating part “A” of FIG. 1.

6 is a conceptual diagram of an injector inspection apparatus using mass according to a second embodiment of the present invention.

7 is a conceptual diagram of an injector inspection apparatus using mass according to a second embodiment of the present invention.

Prior to describing the technical idea of the present invention in more detail using the accompanying drawings, terms or words used in the present specification and claims should not be construed as being limited to a conventional or dictionary meaning, and the inventor himself In order to describe the invention in the best way, based on the principle that the concept of terms can be appropriately defined, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all the technical spirit of the present invention, and thus various alternatives that can be substituted for them at the time of application It should be understood that there may be variations.

Hereinafter, the technical idea of the present invention will be described in more detail using the accompanying drawings. The accompanying drawings are only an example illustrated to describe the technical idea of the present invention in more detail, so the technical idea of the present invention is not limited to the form of the accompanying drawings.

[제1 실시예][First embodiment]

As shown in Figure 3, the injector inspection apparatus using mass according to the first preferred embodiment of the present invention is largely a housing 200, a storage tank 100, a hydraulic pressure generator (not shown), and an injector mounting part ( 300), an injection hose (not shown), a hose holder 500, a measuring unit 600, a control unit 800, and a monitoring unit 700.

The housing 200 has a predetermined shape and is a configuration in which each component is installed.

The storage tank 100 is configured to store test oil required for injector inspection, and is accommodated in the housing 200, and in some cases, one side of the housing 200 is formed as a transparent window as shown in FIG. I can.

The hydraulic generator (not shown) includes a high-pressure pump that increases the pressure of the test oil by receiving the test oil from the storage tank 100, and serves to deliver the high-pressure test oil to the common rail 350 to be described later. do.

The injector mounting unit 300 is a configuration for mounting the injector 310 to be inspected, and includes a common rail 350, an injector holder 330, and a connection hose 370. First, the common rail 350 is a configuration for supplying the high pressure test oil supplied from the hydraulic generator to the injector 310 at a constant pressure. The common rail 350 is installed to protrude from the outer surface of the housing 200, and one side is connected to the hydraulic pressure generator, and the other side is formed with a connection hole (not designated by reference numeral). Here, the connection hole may be formed in plural, which considers that the number of injectors installed in the common vehicle is plural. It is preferable that the connection hole can be opened and closed through a separate stopper according to the number of injectors to be inspected. The connection hose 370 serves to deliver the high-pressure test oil supplied from the common rail 350 to the injector 310, and at the same time, the injector 310 to be inspected is installed. It is connected to the hole, the other end is connected to the injector 310, the connector 311. The injector cradle 330 is formed to protrude from the outer surface of the housing 200 by being spaced from the lower side of the common rail 350 at a predetermined interval, and a plurality of holes are formed in the vertical direction so that the lower part of the injector 310 can be inserted, It prevents the weight of the injector 310 from being added to the connection hose 370.

The injection hose 400 is a configuration for guiding the flow direction of the test oil injected from the injector 310. The injection hose 400 is coupled so as to surround the nozzle 313 at an end of the injector 310 where the nozzle 313 is formed, and the other end passes through the housing 200 and is disposed inside the housing 200.

For reference, when a plurality of injectors 310 are provided in FIG. 3, the shape of the injection hose 400 is formed at one end to be coupled to the nozzles 313 of each injector 310, and the other end is It is shown that they are connected so as to be integral with each other, penetrate through the housing 200 and be disposed inside the housing 200. In addition, it is shown that an opening/closing valve 410 that is opened and closed by the control unit 800 is provided at one end of the injection hose 400. In this case, by opening only one of the plurality of on-off valves 410 in the control unit 800, it is possible to select the injector 310 to be inspected, thereby enabling individual tests.

4 to 5 are side cross-sectional views illustrating part “A” of FIG. 1.

As shown in FIGS. 4 to 5, one side of the injection hose 400 passing through the housing 200 is fixed to a hose holder 500 fixed to the inner wall of the housing 200. The hose holder 500 is formed protruding from the inner wall of the housing 200 to the inside of the housing, and has a fixing hole 510 formed therein, and the other end of the spray hose 400 is inserted into the fixing hole 510 so that the spray hose The position of the other end of the 400 is fixed.

The measuring unit 600 of the injector testing apparatus using mass according to the first preferred embodiment of the present invention includes a first measuring module 610. The first measurement module 610 is composed of an injection chamber 611, a solenoid valve 613, and a first scale 620, wherein the injection chamber 611 has a bucket shape with an open top, but discharges at the bottom. The hole 612 is formed, and the inside is curved to guide the fluid to the discharge hole 612 when the fluid flows into the injection chamber 611. The injection chamber 611 is provided under the hose holder 500 and is disposed so that the other end of the injection hose 400 is accommodated in the injection chamber 611, and is spaced apart so as not to contact the injection hose 400 , Serves to accommodate the test oil sprayed from the other end of the injection hose 400.

The solenoid valve 613 is disposed under the injection chamber 611 and opens and closes the discharge hole 612 under the control of the control unit so that the test oil contained in the injection chamber 611 is maintained in the injection chamber 611 , It plays a role of allowing it to be discharged to the outside. In detail, the solenoid valve 613 has an inlet port 614_a disposed in connection with the discharge hole 612 to communicate with each other, and the test oil flowing into the body of the solenoid valve 613 through the inlet port 614_a. The discharge port (614_a) is formed to guide the outside. In addition, an electromagnet unit 615 is provided on one side of the body of the solenoid valve 613, and the position thereof is variable along with the plunger 616 and the plunger 616 whose position is variable depending on whether the electromagnet unit 615 is energized. The plunger 616 is discharged when electricity is not applied to the stem 617 and the disk 618 for opening and closing the connection part between the inlet port 614_a and the discharge port 614_a, and the electromagnet unit 615 It includes a plunger return spring 619 that pushes toward (614_a) and causes the disk 618 to seal the connection portion between the inlet port 614_a and the discharge port 614_a. In addition, the outer periphery of the discharge port 614_a is formed to extend from the body of the solenoid valve 613 and is formed to be bent downward, and may be formed to guide the test oil discharged from the solenoid valve 613 downward. .

A first scale 620 is provided under the solenoid valve 613. The first balance 620 measures the mass of the test oil injected into the injection chamber 611, and when measuring the mass, the injection chamber 611 and the solenoid valve 613 disposed above the first balance 620 Measure the mass by excluding the mass. In the above, the injection hose 400 is disposed so that its position is fixed by the hose holder 500 so that it does not contact the injection chamber 611 to prevent an error in the mass measured by the first balance 620. In addition, although not shown, the first measurement module 610 is provided with a separate protective bucket (not shown) that accommodates the first measurement module 610 on the outside, and prevents external objects from contacting the first measurement module 610. It is also possible to prevent an error in the measured value of the scale 620 from occurring.

The controller 800 controls whether or not the test oil is injected from the injector 310 and the discharge hole is opened or closed through the solenoid valve 613, and calculates the test oil injection amount of the injector from the mass measured by the first measurement module 610. Plays a role. In detail, the control unit first controls the injector to inject test oil and at the same time cuts off the current flowing in the electromagnet unit 615, the plunger 616 and the stem through the elastic force of the plunger return spring 619 The portion 617 and the disk 618 are pushed toward the discharge port 614_a to close the portion where the inlet port 614_a and the discharge port 614_a communicate with each other. Accordingly, the test oil injected from the injector 310 is guided to the injection chamber 611 through the injection hose 400, and the discharge hole 612 is closed by the solenoid valve 613, The injected test oil is accommodated in the injection chamber 611. The control unit 800 controls the injector 310 to inject the test oil, and calculates the injection amount of the test oil of the injector 310 from the mass of the test oil measured by the first balance 620 after a preset set time has elapsed. And, the result is displayed on the monitoring unit 700. Here, when the control unit 800 calculates the test oil injection amount, using the mass of the test oil measured by the first balance 620 after a set time has elapsed after the test oil injection by the injector 310 is used, the injector ( The time taken for the test oil injected from 310) to reach all of the injection chamber 611 is considered. The control unit 800 applies current to the electromagnet unit 615 after calculating the amount of test oil injected by the injector 310, and discharges the plunger 616, the stem 617, and the disk 618 by magnetic force into the discharge port 614_a. By moving to the other side, the connection part between the inlet port 614_a and the discharge port 614_a is opened, and the test oil contained in the injection chamber 611 is discharged to the outside.

For reference, a discharge bucket 640 is provided below the discharge port 614_a, and the discharged test oil may be re-injected into the storage tank 100. In this case, it is preferable that the discharge bucket 640 is disposed to be spaced apart from the discharge port 614_a so that an error does not occur in the first scale 620.

In addition, as shown in FIG. 3 above, when the shape of the injection hose 400 is divided into a plurality at one end and connected to each injector, and the other end is formed integrally, the first measurement module 610 is provided as a single unit. If the injection hoses 400 connected to each injector are not connected to each other and are provided individually, a plurality of first measurement modules 610 will also be provided so as to correspond to each injection hose 400. In addition, when a single first measurement module 610 is provided, the control unit controls to open the on/off valve corresponding to the injector to be tested before controlling the injector to inject the test oil, and the remaining on/off valves are closed. First, the injector is controlled to inject test oil. When the first measurement module 610 is single, it is possible to reduce the volume of the injector inspection apparatus using mass, and at the same time, it is possible to expect an effect of easy management.

In addition, the control unit 800 controls each injector 310 to inject the test oil a predetermined number of times before inspection of the injector 310, and controls the solenoid valve 613 to open the discharge hole 612, and After time has elapsed, the injector 310 may be inspected. This means that when the test oil is first injected from the injector 310 while the inside of the injection hose 400 is dried to distribute the components of each part, the test oil is buried on the inner surface of the injection hose 400 and the amount of test oil actually injected and the injection chamber 611 This is taking into account that there is a difference in the amount of test oil contained in ).

[제2 실시예][Second Example]

Hereinafter, an injector inspection apparatus using mass according to a second embodiment of the present invention will be described. The injector inspection apparatus using mass according to the second preferred embodiment of the present invention has the same configuration as the first embodiment described above, but in the configuration of the measurement unit 600, the second measurement module 630 and the third In this case, a measurement module (not shown) is additionally configured. In the description of the second preferred embodiment of the present invention, the description of the same configuration as the first embodiment will be omitted.

First, the second measurement module 630 will be described with reference to FIG. 6. The second measurement module 630 is disposed under the storage tank 100 to measure the mass of the test oil accommodated in the storage tank 100. It consists of two scales 633.

When the injector 310 is inspected, the controller 800 measures the mass of the storage tank 100 before controlling the injector 310 to inject the test oil, and causes the injector 310 to After controlling to spray, the mass of the storage tank 100 is measured, and the difference in mass of the test oil measured by the second balance 633 before and after the injection of the test oil by the injector 310 is measured by the first balance. Compare them with the mass of significance. The test oil leaked from the storage tank 100 passes through the filter unit 900, the hydraulic pressure generator 210, the common rail 350, the injector 310, and the injection hose 400, as shown. There may be some error between the mass difference value of the test oil measured by the scale 633 and the mass of the test oil measured by the first balance. When the difference between the two values is more than a preset reference error, the controller 800 stores It is considered that an abnormality has occurred in the configuration from the tank 100 to the injection hose 400 or an abnormality has occurred in the first scale 620 and controlled to display an abnormality measurement notification on the monitoring unit, allowing the inspector to calculate the calculated injector. Recognize that the reliability of the test oil injection amount in (310) is not high and that maintenance is required.

On the other hand, as shown in Figure 7, the injector inspection apparatus 1000 using the mass according to the second embodiment of the present invention includes a discharge bucket 640, a transfer hose 651, and a cylinder 652 A third measurement module 650 is further provided. The cylinder 652 is elongated, has a scale marked on the outer surface, is provided on the inner wall of the housing 200, and is provided in a number corresponding to the number of the injection nozzles 313. The wall surface of the housing 200 on which the cylinder 652 is provided is formed as a transparent window, and is provided so that the cylinder 652 can be seen from the outside. Previously, in the description of the first embodiment, the discharge bucket 640 is connected to the storage tank 100 and the used test oil is said to flow back into the storage tank 100, but the discharge bucket 640 according to the second embodiment. ) Is not connected to the storage tank 100, but is connected to the transfer hose 651. The transfer hose 651 has one end connected to the upper end of the cylinder 652 and the other end connected to the discharge bucket 640. That is, the test oil discharged from the solenoid valve 613 flows into the cylinder 652 through the discharge bucket 640 and the transfer hose 651, allowing the inspector to test the injector displayed on the monitoring unit 700. The oil injection amount and the scale of the cylinder 652 containing the test oil are compared with each other, so that the reliability of the test result can be grasped.

The technical idea should not be interpreted as limited to the above-described embodiment of the present invention. As well as a variety of application ranges, various modifications can be made at the level of those skilled in the art without departing from the gist of the present invention claimed in the claims. Therefore, these improvements and changes will fall within the scope of protection of the present invention as long as it is apparent to those skilled in the art.

[Explanation of code]

100: storage tank

200: housing

210: hydraulic generator

300: injector mounting part

310: injector

311: connector

313: nozzle

330: injector cradle

350: common rail

370: connecting hose

400: injection hose

500: hose holder

510: fixed ball

600: measurement unit

610: first measurement module

611: spray chamber

612: discharge hole

613: solenoid valve

614_a: inlet port

614_b: discharge port

615: electromagnet unit

616: plunger

617: stem

618: disk

619: plunger return spring

620: first scale

630: second measurement module

633: second scale

640: discharge bucket

650: third measurement module

651: transfer hose

652: cylinder

700: monitoring unit

800: control unit

900: filter unit

Claims

housing;

A hydraulic pressure generator that receives the test oil from the storage tank and increases the pressure of the test oil;

An injector mounting unit including a common rail connected to the injector and supplied with high pressure test oil from the hydraulic pressure generator and discharged to the injector;

An injection hose having one end connected to the nozzle of the injector;

A hose holder fixed to the housing and fixing the spray hose;

A measuring unit provided under the hose holder and including a spray chamber for receiving the test oil sprayed from the spray hose and a first scale disposed below the spray chamber to measure the mass of the test oil sprayed into the spray chamber;

A control unit controlling the injection of test oil of the injector and calculating an injection amount of test oil of the injector from the mass measured by the measuring unit; And

Including; a monitoring unit for displaying the amount of test oil injection calculated by the control unit,

Injector inspection apparatus using mass, characterized in that the other end of the injection hose is spaced apart from the measuring unit.
The method of claim 1,

The injection chamber,

A discharge hole is formed at the bottom,

The measurement unit,

It is provided between the injection chamber and the first balance, further comprising a solenoid valve for opening and closing the discharge hole according to the control of the control unit to discharge the test oil accommodated in the injection chamber to the outside,

The control unit,

When controlling the injector to inject test oil, the solenoid valve is controlled to close the discharge hole.
The method of claim 2,

The control unit,

The injector inspection apparatus using mass, characterized in that the injector controls the injection of test oil and calculates the injection amount of test oil of the injector from the mass of the test oil measured by the first balance after a set time has elapsed.
The method of claim 3,

The control unit,

After calculating the test oil injection amount of the injector, the solenoid valve is controlled to open the discharge hole.
The method of claim 1,

The measuring unit,

A first measurement module including the injection chamber and the first scale, and

It is disposed under the storage tank, and includes a second measurement module including a second balance for measuring the mass of the test oil accommodated in the storage tank,

The control unit,

The mass of the test oil measured by the first balance after the injection of the test oil by the injector and the mass difference value of the test oil measured by the second balance before and after the injection of the test oil by the injector are compared with each other, and the difference value is preset Injector inspection apparatus using mass, characterized in that for controlling to display an abnormality measurement notification on the monitoring unit in case of a reference error or more.
The method of claim 2,

The measurement unit,

A first measurement module including the injection chamber, the first balance and a solenoid valve, and

A first comprising a cylinder installed outside the housing and marked on the outer surface, a discharge bucket for receiving the test oil discharged to the outside through the solenoid valve, and a transfer hose for transferring the test oil contained in the discharge bucket to the cylinder. Injector inspection device using mass, characterized in that it comprises three measurement modules.