KR101549149B1 - System for testing performance of injector and cleaning injector, and method for testing performance of injector and cleaning injector - Google Patents

Abstract

A system for testing performance of an injector and cleaning the injector according to an embodiment of the present invention comprises: a fuel supply unit having a plurality of injectors installed on a fuel distribution line connected to a fuel tank; a plurality of cleaning and visualization chambers connected to the plurality of injectors to accommodate fuel sprayed from the injectors; a fuel amount measurement unit which has a plurality of spray amount measurement chambers connected between the cleaning and visualization chambers and the fuel tank, and measures a fuel spray amount of the fuel sprayed from the injectors and supplied to the spray amount measurement chambers via the cleaning and visualization chambers; a cleaning unit connected to the cleaning and visualization chambers in a closed circulation structure to supply cleaning liquid to the cleaning and visualization chambers to clean the injectors when the cleaning liquid circulates; and a control unit which is connected to the fuel supply unit, the cleaning unit, and the fuel amount measurement unit, controls the fuel amount measurement unit to test whether the injectors are in a condition which requires cleaning, and controls the fuel supply unit and the cleaning unit to operate the fuel supply unit and the cleaning unit to clean the injectors if a condition of the injectors requires cleaning.

Description

TECHNICAL FIELD [0001] The present invention relates to an injector performance test combined with a cleaning system and an injector performance test combined with a cleaning method and an in-

The present invention relates to an injector performance test combined with a cleaning system and an injector performance test combined and cleaning method. More particularly, the present invention relates to a GDI injector test system configuration that meets actual vehicle operating conditions, The present invention relates to an injector performance test-combined cleaning system and an injector performance test combined-use cleaning method.

Generally, the automobile injects fuel such as gasoline, light oil or LPG or CNG at a predetermined time interval in the internal combustion engine as well as generates a flame or generates a flame after compression to generate combustion energy Heat quantity).

In addition, a gasoline direct injection engine (GDI) of an automobile engine is an engine capable of completely burning in a state where the mixture ratio is lean by injecting gasoline directly into a cylinder filled with air in advance. Here, an injector is used as a member for supplying gasoline into the cylinder. That is, an automobile injector is a device that sends fuel to the engine.

After running for a long time, the injector is clogged with carbon, which may cause the injector nozzle to become blocked, causing engine failure or causing engine exhaust. Also, it is necessary to clean the injector nozzle using a separate injector cleaner shall.

The injector cleaner is a device for removing impurities such as carbon and sludge adhering to such an injector, and is a device for dissolving and removing the impurities by supplying a cleaning agent (strictly speaking, a mixture of a chemical and a fuel) to the fuel system of the engine.

FIG. 1 schematically shows a configuration of a conventional injector cleaning system according to the prior art.

The injector cleaning system 10 according to the related art includes a fuel tank 11, a fuel pump 12, a manual regulator 13, a fuel distribution line 14, an injector 15, a metering cylinder 16 for measuring an injection amount, , And a manual discharge valve (17).

The existing injector cleaning system checks the pressure of the operator and adjusts the fuel pressure to a certain level through manual operation of the manual regulator 13, and then performs the injection test of the injector 15. At this time, the fuel contained in the fuel tank 11 flows to the fuel distribution line 14 via the fuel pump and is supplied to the spray cylinder 16 from the fuel distribution line 14 via the injector 15 .

The user directly visually checks the injection amount from the test result or separately measures a separate measuring cylinder to measure whether or not the injector 15 is abnormal. After the measurement is completed, the fuel contained in the metering cylinder 16 for measuring the injection amount is recirculated to the fuel tank 11 when the manual valve is opened.

After completion of the test of the injection amount in the above-described manner, when the cleaning is necessary, the user carries out the cleaning operation directly by using the separate cleaning device 19. When cleaning is required, the injector 15 requiring cleaning is separated from the fuel distribution line 14. The separated injector 15 is cleaned in a separate ultrasonic cleaner, which is a separate cleaning device.

The conventional injector 15 testing and cleaning system according to the prior art has the following problems.

In actual GDI vehicle driving conditions, the fuel pressure generally operates at 80 bar under idle conditions and at pressures up to 200 bar. In the conventional GDI injector 15 test and cleaning system, the system consists of a pressure of 10 bar or less, which is different from the actual operating pressure of the injector 15. Therefore, the result of the test of the injector 15 itself is somewhat And there is a disadvantage in that the test results can not be derived in various pressure situations.

Accordingly, it is inconvenient for the user to directly perform the main tasks such as the pressure control, the injection amount measurement, and the cleaning. Particularly, in the process of cleaning the injector 15 with a separate ultrasonic cleaning device, only the external cleaning of the injector 15 proceeds, and the inside of the nozzle can not be cleaned properly.

Korean Unexamined Patent Publication No. 1997-0000365 discloses an injector abnormality inspection and ultrasonic cleaner equipment for a van.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an injector performance test system capable of automatically assembling a series of processes, And to provide a combined cleaning method and an injector performance test combined cleaning method.

That is, according to the present invention, a basic optimal test condition (for example, a time for injecting fuel into the injector, a pressure range of fuel injected into the injector, etc.) is set in advance and an injector performance test And to provide a combined cleaning system.

In the present invention, when the fuel injection amount injected from the injector is greatly deviated from the reference injection amount after completion of the injector fuel injection amount test, the injector is automatically cleaned in accordance with the injector fuel injection amount test result without detaching the injector from the fuel injection line And an injector performance test combined with the injector performance test.

According to an embodiment of the present invention, an injector performance test and cleaning system includes a fuel supplier having a plurality of injectors installed in a fuel distribution line connected to a fuel tank; A plurality of combinable visualization chambers respectively connected to the plurality of injectors, each of the plurality of combinational visualization chambers receiving fuel injected from each of the plurality of injectors; A fuel quantity measurement unit for measuring a fuel injection quantity of fuel supplied to the injection quantity measurement chamber via the cleaning and visualization chamber which is injected from the injector and is provided with a plurality of injection quantity measurement chambers respectively connected between the plurality of cleaning and combining visualization chambers and the fuel tank; A cleaning unit connected to the visualization chamber through a closed loop structure for cleaning the plurality of injectors during the circulation of the cleaning liquid by providing the cleaning liquid to the visualization chamber for cleaning; And a controller for controlling the fuel amount measuring unit to test whether the injector is in a state requiring cleaning, and when the state of the injector is in a state requiring cleaning, And a control unit for controlling the fuel supply and the cleaning unit to operate the cleaning unit to clean the injector.

In one embodiment of the present invention, the cleaning-use visualization chamber is provided with a first accommodation space in which a cleaning liquid or fuel is received, an injector connection opening through which the injector is connected to the upper portion of the cleaning- A cleaning liquid inlet port through which the cleaning liquid is introduced and a member mounting opening through which the ultrasonic wave generating member is installed are provided on one side of the dual purpose visualization chamber and a cleaning liquid discharge port through which the cleaning liquid is discharged is provided in the lower part of the cleaning and combining chamber, A first 1a solenoid valve connected to the control unit and operated to open and close the washing solution inlet, and a first b solenoid valve connected to the control unit and operated to open and close the washing solution discharge port, are connected to the visualization chamber .

In one embodiment of the present invention, the fuel amount measuring section is provided with a second accommodation space in which the fuel provided in the cleaning and combining visualization chamber is accommodated, and a second fuel inlet and a second fuel outlet communicating with the second accommodation space An injection amount measuring chamber provided; A second solenoid valve installed between the second fuel inlet and the cleaning chamber for cleaning and connected to the control unit and operated to open and close the second fuel inlet; A third solenoid valve installed at the second fuel outlet and connected to the control unit to operate to open and close the second fuel outlet; A fuel amount measuring sensor installed in the injection amount measuring chamber for measuring a fuel injection amount injected from the injector into the second accommodation space; An injecting fuel flow pipe connecting the second fuel inlet and the washing and combining visualization chamber; And a measured fuel discharge pipe connecting the second fuel discharge port and the fuel tank.

In one embodiment of the present invention, the control section is provided with a pressure range of the fuel supplied to the injector before the injector fuel injection quantity test and a reference injection quantity which is a reference value that can be injected for a predetermined time from the injector in the steady state, The second solenoid valve is unlocked to open the second fuel inlet and the third solenoid valve is kept in the locked state to close the second fuel outlet so that the fuel injected from the plurality of injectors can be visualized for cleaning The fuel injection amount of the fuel filled in the second accommodation space is measured by the fuel amount measuring sensor and then the fuel injection amount is compared with the reference injection amount to determine whether the injector is in the steady state The injector fuel injection amount test result is obtained as to whether or not the third solenoid valve is in a required state, That releases the locking solenoid valve, to open the second fuel outlet, the fuel received in the second receiving area to flow to the fuel tank is preferred.

In one embodiment of the present invention, when the fuel injection quantity is equal to or larger than the error range of the reference injection quantity as a result of the injector fuel injection quantity test, the control part advances the cleaning of the injector to supply fuel to the injector, It is preferable that the fuel injection cleans the inside of the injector and the cleaning unit provides the cleaning liquid to the cleaning and combining visualization chamber so that the cleaning liquid cleans the outside of the injector.

In one embodiment of the present invention, the fuel supply unit includes a fuel supply pipe connecting the fuel tank and the fuel distribution line; A fuel pump portion connected to the fuel supply pipe for pumping fuel in the fuel tank; And an electronic regulator connected to the fuel supply pipe and the fuel tank, the electronic regulator being controlled by the control unit to regulate the pressure of the fuel flowing through the fuel supply pipe.

In one embodiment of the present invention, the cleaning section includes a cleaning liquid tank containing a cleaning liquid; A wash pump incorporated in the wash tank; A cleaning liquid inlet pipe connected to the cleaning liquid pump and the cleaning chamber; A first-a solenoid valve installed in the cleaning-use visualization chamber for opening and closing the cleaning-liquid inlet pipe and connected to the control unit to allow or block the flow of the cleaning liquid discharged from the cleaning liquid pump into the plurality of cleaning- A cleaning liquid discharge pipe connected to the cleaning liquid tank and the visualization chamber for cleaning both; A first b-solenoid valve installed in the cleaning-purpose visualizing chamber for opening and closing the cleaning liquid discharge pipe and connected to the control unit, for allowing or blocking the flow of the cleaning liquid in the cleaning visualization chamber into the cleaning liquid tank; And an ultrasonic wave generating member connected to the visualizing chamber for washing and serving to provide ultrasonic vibration to the washing liquid stored in the washing and visualizing chamber, wherein the ultrasonic wave generating member is configured such that, when the washing liquid is filled in the washing and combining chamber So that the cleaning liquid is allowed to wash the injector.

In one embodiment of the present invention, it is preferable that the cleaning unit further includes a filter member connected to the cleaning liquid discharge pipe, for filtering the filtrate present in the cleaning liquid supplied to the cleaning liquid tank from the cleaning and visualizing chamber.

In one embodiment of the present invention, the control unit releases the locking state of the first-a solenoid valve to allow the washing liquid to flow into the cleaning-use visualization chamber along the washing-liquid inlet pipe, maintains the locked state of the first-b solenoid valve, And the ultrasonic wave generating member is provided with ultrasonic vibration by the ultrasonic wave generating member so that the ultrasonic vibration is provided to the ultrasonic wave generating member so that the outer surface of the injector is cleaned and the washing of the injector After completion, it is preferable to release the locking state of the first b solenoid valve so that the washing liquid is supplied to the washing liquid tank along the washing liquid discharging tube.

On the other hand, the fuel injection amount test of a plurality of injectors of the injector performance test-combined cleaning system and the injector performance test combined cleaning method for cleaning a plurality of injectors includes (a) before the injector fuel injection quantity test, A reference injection amount which is a reference value that can be injected in a steady state injector for a predetermined time is set in advance and a cleaning information for allowing the injector to be cleaned when the fuel injection amount injected from the injector is different from the error range of the reference injection amount The method comprising: (b) fuel is supplied to the plurality of injectors by the fuel supplier; (c) By the control ring of the control unit, the first-a solenoid valve and the first-b solenoid valve of the cleaning unit are locked and the second solenoid valve of the fuel amount measurement unit is unlocked, Flowing into the injection amount measurement chamber via the visualization chamber; (d) a fuel injection amount filled in the injection amount measurement chamber is measured for a predetermined time, and a fuel injection amount is compared with a reference injection amount, and a fuel injection amount test of each of a plurality of injectors is performed; (e) When the numerical value of the fuel injection quantity measured in the step (d) is equal to or larger than the error range of the reference injection quantity according to the predetermined cleaning information in the control unit, the fuel supply unit supplies the high pressure fuel to the plurality of injectors, Is washed; (f) After the step (e), the cleaning liquid is supplied to the cleaning chamber for cleaning up to a preset reference level in the control unit by the unlocking of the first-a solenoid valve and the operation of the cleaning liquid pump of the cleaning unit according to the pre- Cleaning the outside of the injector while the cleaning liquid is ultrasonically vibrated by the operation of the ultrasonic wave generating member; And (g) when the washing of the outside of the injector is completed by the step (f), the first b solenoid valve is unlocked, and the washing liquid flows to the washing liquid tank of the washing section.

According to an embodiment of the present invention, when the value of the fuel injection amount measured in the step (d) falls within the error range of the reference injection amount, the step of displaying whether the injector is cleaned is displayed on the display screen provided in the control part .

In one embodiment of the present invention, in the step (e), the control unit supplies the injector with high-pressure fuel within a pressure range of 200 bar to 300 bar via the fuel supply unit, so that foreign substances accumulated inside the injector due to injection of high- Is preferably removed.

In one embodiment of the present invention, in step (e), the injector is preferably operated to inject fuel at an injection frequency of 1 kHz or more.

The present invention can constitute an injector test and cleaning system that meets the actual vehicle operating conditions and can automatically assemble a series of processes leading to reading and cleaning of results in the test.

That is, according to the present invention, it is possible to automatically test the amount of fuel injected from the injector by setting a basic optimal test condition (for example, a time for injecting fuel from the injector, a pressure range of the fuel discharged to the injector, etc.) The control system automatically adjusts the pressure from a low pressure to a high pressure condition and can measure the amount of injection in each situation.

Therefore, the present invention can automatically clean the injector without detaching the injector from the fuel injection line when the fuel injection amount injected from the injector after the completion of the injector fuel injection amount test is greatly deviated from the reference injection amount, The convenience can be increased.

In addition, according to the present invention, the control unit compares the fuel injection amount with the reference injection amount according to information previously set in the control unit, and a state in which the injector is required to be cleaned or not required to be cleaned is read by the control unit, Performance testing and cleaning of the injector can be performed at the work force level.

1 schematically shows a configuration diagram of an injector cleaning system according to the prior art.
FIG. 2 is a schematic view of a configuration of a cleaning system for both an injector performance test according to an embodiment of the present invention.
3 is a schematic view illustrating a connection state of a fuel supply, a fuel amount measurement unit and a cleaning unit of an injector performance test and cleaning system according to an embodiment of the present invention.
Figure 4 schematically shows a perspective view of a cleaning and visualizing chamber according to an embodiment of the present invention.
FIG. 5 is a graph showing a change in the fuel pressure and the injection frequency of the injector provided to the injector according to the time of the internal cleaning operation of the injector according to an embodiment of the present invention.

Hereinafter, an injector performance test combined cleaning system and an injector performance test combined and cleaning method according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

First, referring to FIGS. 2 to 4, a description will be given of an injector performance test and cleaning system 100 according to an embodiment of the present invention.

2 and 3, the injector performance testing and cleaning system 100 according to an embodiment of the present invention includes a fuel supplier 110, a plurality of cleaning and combining chambers 120, 130, a cleaning unit 140, and a control unit 150.

In one embodiment of the present invention, the fuel supplier 110 includes a fuel tank 111, a fuel supply pipe 113, a fuel pump unit 112, an electronic regulator 114, a fuel distribution line 115, And includes an injector 116.

The fuel tank 111 is a tank in which fuel (for example, gasoline) is received. The fuel tank 111 is connected to a fuel supply pipe 113, a fuel pump unit 112, and an electronic regulator 114.

The fuel supply pipe 113 connects the fuel tank 111 and the fuel distribution line 115. The fuel pump 112 is connected to the fuel supply pipe 113. The fuel pump unit 112 includes a low pressure fuel pump 112a built in the fuel tank 111 and a pneumatic high pressure pump 112b connected to the low pressure fuel pump 112a.

The electronic regulator 114 is connected to the fuel supply pipe 113 and the fuel tank 111 and is controlled by the control unit 150 to adjust the pressure of the fuel flowing through the fuel supply pipe 113. The injector performance testing and cleaning system 100 according to the present embodiment can control the pressure of the fuel supplied from the fuel tank 111 to the fuel injection line by the control of the control unit 150 connected to the electronic regulator 114 It can be adjusted from low pressure to high pressure.

The fuel tank 111, the fuel supply pipe 113, the fuel pump unit 112, the regulator, the fuel distribution line 115 and the plurality of injectors 116 according to the present embodiment are known components of a gasoline engine, A detailed description thereof will be omitted.

In this embodiment, the plurality of injectors 116 are members for injecting the fuel supplied from the fuel tank 111 to the fuel injection line. Each of the plurality of injectors 116 is connected to a cleaning-use visualization chamber 120. Hereinafter, the cleaning-use visible chamber 120 will be described.

2 and 3, the cleaning and combining chamber 120 according to an embodiment of the present invention is connected to the injector 116, the injection amount measuring chamber 131, and the washing liquid tank 141.

As shown in FIG. 4, the cleaning chamber 120 is provided with a first accommodation space 121 in which a cleaning liquid or fuel is received. The cleaning chamber 120 is provided with an injector connection opening 122 communicating with the first accommodation space 121, a cleaning liquid inlet 124, a member mounting opening 125, a cleaning liquid outlet 126, (127).

Here, the injector connection opening 122 is provided at an upper portion of the cleaning-use visualization chamber 120, and is a portion into which the injector 116 is inserted. The cleaning liquid inlet 124 is provided at one side of the cleaning-use visualization chamber 120 separated from the injector connection opening 122 and is provided with a cleaning liquid inlet pipe 143 connected to the cleaning liquid tank 141. A first a solenoid valve 144 is installed in the washing liquid inlet 124. The 1a solenoid valve 144 is a member for opening and closing the washing solution inlet 124. The washing unit 140 will be described later.

The cleaning liquid discharge port 126 is provided below the cleaning-use visualization chamber 120. Here, the washing liquid discharge pipe (147) is connected to the washing liquid discharge port (126). A first b solenoid valve 145 is provided in the cleaning liquid discharge port 126. The first b-solenoid valve 145 is a member for opening and closing the cleaning liquid discharge opening 126, and the cleaning unit 140 will be described later.

The first fuel outlet 127 is provided at a lower portion of the cleaning chamber 120 for separation from the cleaning liquid discharge port 126. Here, the first fuel outlet is a portion where the fuel contained in the first accommodation space 121 is discharged to the outside of the cleaning and combining chamber 120 when the fuel amount measuring unit is constructed as described later.

A second solenoid valve 132 is installed in the first fuel outlet 127. The second solenoid valve 132 is a member for opening and closing the first fuel outlet 127. The injection fuel flow pipe 136 is connected to the first fuel outlet 127. Here, the injection fuel flow pipe 136 connects the visualization chamber 120 for cleaning and the injection amount measurement chamber 131, and is a pipe through which the fuel flows.

4, the member mounting opening 125 is provided at one side of the cleaning-use-purpose visualizing chamber 120, away from the cleaning liquid inlet 124. [ The member mounting opening 125 is provided with an ultrasonic wave generating member 146. The ultrasonic wave generating member 146 may be inserted into the first receiving space 121 and installed in the washing and visualizing chamber 120 so as to provide ultrasonic vibration to the washing liquid contained in the first receiving space 121 .

Hereinafter, the fuel amount measurement unit 130 for measuring the fuel injection amount injected from the injector 116 to the cleaning and combining chamber 120 will be described.

2 and 3, the fuel amount measuring unit 130 includes a plurality of injection amount measuring chambers 131, a second solenoid valve 132, a third solenoid valve 133, a fuel amount measuring sensor 135, An injection fuel flow pipe 136 and a measurement fuel discharge pipe 137. The fuel amount measuring unit 130 measures the amount of fuel injected from the injector 116 by receiving the fuel injected from the injector 116 into the cleaning and combining chamber 120 through the cleaning and combining chamber 120.

The injection amount measurement chamber 131 is provided with a second accommodation space 134 in which the fuel provided in the cleaning and combining chamber 120 is received. In the injection amount measurement chamber 131, a fuel amount measurement sensor 135 is installed. The fuel amount measurement sensor 135 is a sensor that measures the amount of fuel injected from the injector 116 into the second accommodation space 134.

The injection amount measurement chamber 131 is provided with a second fuel inlet 131a and a second fuel outlet 131b communicating with the second accommodation space 134. [

 The injection fuel flow pipe 136 is connected to the second fuel inlet 131a. The injection fuel flow pipe 136 is a pipe for connecting the second fuel inlet 131a and the first fuel outlet 127. [ A second solenoid valve 132 is connected to the first fuel outlet 127.

The second solenoid valve 132 is connected to the control unit 150 so that the first solenoid valve 132 is operated to open the first fuel outlet 127 when the fuel amount measuring unit 130 is operated by the control ring of the control unit 150 The fuel in the first accommodation space 121 is allowed to flow into the injection amount measurement chamber 131 via the injection fuel flow pipe 136 and the first fuel outlet 127 Is closed to block the inflow of the cleaning liquid into the injection amount measurement chamber 131 in the first accommodation space 121. [

On the other hand, the measurement fuel discharge pipe 137 is connected to the second fuel discharge port 131b. The measurement fuel discharge pipe 137 is a pipe for connecting the second fuel discharge port 131b and the fuel tank 111. [

A third solenoid valve 133 is provided in the second fuel outlet 131b. The third solenoid valve 133 is installed in the second fuel discharge port 131b and connected to the control unit 150 so that the second fuel discharge port 131b can be opened and closed by the control ring of the control unit 150 It is a valve to be operated.

The third solenoid valve 133 is operated to close the second fuel discharge port 131b in operation of the fuel amount measuring unit 130 to block the fuel in the second accommodation space 134 from being supplied to the fuel tank 111 .

The third solenoid valve 133 is operated to open the second fuel outlet 131b after completion of measurement of the amount of fuel injected by the fuel amount measuring unit 130 so that the fuel in the second accommodation space 134 is discharged to the measurement fuel discharge pipe To flow into the fuel tank 111 via the fuel tank 137. The control unit 150 will be described later.

Hereinafter, the cleaning unit 140 will be described.

2 and 3, in an embodiment of the present invention, the cleaning unit 140 includes a cleaning liquid tank 141, a cleaning liquid pump 142, a cleaning liquid inlet pipe 143, a first solenoid valve 144 A cleaning liquid discharge pipe 147, a first b solenoid valve 145 and an ultrasonic wave generating member 146. [

The cleaning unit 140 is connected to the plurality of cleaning and combining chambers 120 in a closed loop structure by a cleaning liquid inlet pipe 143 and a cleaning liquid discharge pipe 147. In operation of the cleaning part 140, the cleaning liquid is circulated along the cleaning liquid circulation line Fclean. Here, the cleaning unit 140 is a member used for cleaning the plurality of injectors 116 in the circulation of the cleaning liquid by providing the cleaning liquid to the cleaning and visualizing chamber 120.

The washing liquid tank 141 is a tank containing the washing liquid. A washing liquid pump 142 is incorporated in the washing liquid tank 141. A washing liquid inlet pipe 143 is connected to the washing liquid tank 141. The cleaning liquid inlet pipe 143 is connected to the cleaning liquid inlet port 124 of the cleaning liquid pump 142 and the cleaning and combining chamber 120 so that the cleaning liquid discharged from the cleaning liquid tank 141, To the plurality of cleaning and combining chambers (120).

The 1a solenoid valve 144 is installed in the cleaning liquid inlet 124. The first solenoid valve 144 is a valve that is controlled by the control unit 150 to allow or block the flow of the cleaning liquid discharged from the cleaning liquid pump 142 to the plurality of cleaning and combining chambers 120 for cleaning.

The first-a solenoid valve 144 is operated by the control ring of the control unit 150 so that the cleaning liquid inlet 124 is opened before the cleaning of the injector 116 is completed. At this time, the cleaning liquid flows from the cleaning liquid tank 141 into the first accommodation space 121.

The first 1a solenoid valve 144 is opened by the control ring of the control unit 150 when the cleaning liquid filled in the first accommodation space 121 of the cleaning and combining visualization chamber 120 reaches a preset value in the control unit 150 The inlet 124 is closed so that the inflow of the washing liquid into the first accommodating space 121 can be blocked.

On the other hand, the ultrasonic wave generating member 146 is installed in the member mounting opening 125 of the washing and visualizing chamber 120. The ultrasonic wave generating member 146 provides ultrasonic vibration to the washing liquid stored in the washing and visualizing chamber 120. The ultrasonic wave generating member 146 can ultrasonically vibrate the washing liquid to clean the injector 116 when the washing liquid is filled in the cleaning chamber 120 to the predetermined reference level in the control unit 150. Here, the reference water level refers to the water level at which the ultrasonic wave generating member 146 and the injector 116 are immersed in the washing liquid.

After the cleaning of the injector 116 is completed, the cleaning liquid may be supplied to the cleaning liquid tank 141 through the cleaning liquid discharge pipe 147.

Here, the cleaning liquid discharge pipe 147 is a pipe connected to the cleaning liquid discharge port 126 of the cleaning-use visualization chamber 120 and the cleaning liquid tank 141. A first b solenoid valve 145 is connected to the cleaning liquid discharge port 126.

In one embodiment of the present invention, the first b solenoid valve 145 is installed in the control unit 150. The first b solenoid valve 145 is a valve that is controlled by the control unit 150 to allow or block the flow of the cleaning liquid in the cleaning liquid visualization chamber 120 into the cleaning liquid tank 141.

Specifically, the first b solenoid valve 145 is operated by the control ring of the control unit 150 so that the cleaning liquid discharge port 126 is closed before the cleaning of the injector 116 is completed, so that the cleaning liquid in the first accommodation space 121 It can be prevented from being discharged to the outside.

After the injector 116 is completely cleaned, the first b solenoid valve 145 is operated to open the cleaning liquid discharge port 126 so that the cleaning liquid in the first accommodation space 121 flows through the cleaning liquid discharge pipe 147 into the cleaning liquid tank 141).

After the cleaning is completed, the cleaning liquid discharged from the cleaning-use visualization chamber 120 flows into the cleaning liquid tank 141 through the cleaning liquid discharge pipe 147 in the open state of the first b solenoid valve 145. The injector performance testing and cleaning system 100 according to an embodiment of the present invention may include a filter for preventing the foreign substances separated from the injector 116 from being injected into the cleaning liquid tank 141 immediately after being mixed with the cleaning liquid, (148) member is installed. Here, the filter 148 member is connected to the washing liquid discharge pipe 147. The cleaning liquid, which is discharged from the cleaning and combining chamber 120 and mixed with the foreign substances, is filtered by the filter 148 and then introduced into the cleaning liquid tank 141.

The control unit 150 is connected to the fuel supply unit 110, the cleaning unit 140, and the fuel amount measurement unit 130. The control unit tests whether the fuel injected through the injector 116 is injected within a predetermined reference injection amount range during the operation of the fuel amount measuring unit 130. If the fuel injection amount of the injector 116 is less than the reference injection amount It is a member for controlling the fuel supplier 110 and the cleaner 140 so that the injector 116 is cleaned without any user's operation.

The control unit 150 includes a micro controller unit connected to the fuel supplier 110, the cleaning unit 140 and the fuel amount measuring unit, and a micro controller unit connected to the MCU to measure the fuel injection quantity of the injector 116, And a display screen on which information such as a washing progress notification is displayed. The MCU and the display screen belong to a known technology, but a detailed description thereof will be omitted.

The control unit 150 controls the fuel supply unit 110 and the fuel amount measurement unit such that the fuel supply unit 110 and the fuel amount measurement unit are activated and the cleaning unit 140 is deactivated, The washing unit 140 and the fuel amount measuring unit 130 are controlled.

The control unit 150 controls opening and closing of the first solenoid valve 144, the first b solenoid valve 145, the second solenoid valve 132, and the third solenoid valve 133 in operation of the fuel amount measuring unit. The first solenoid valve 144 and the first b solenoid valve 145 close the cleaning liquid inlet 124 and the cleaning liquid outlet 126 respectively and the second solenoid valve 132 closes the first fuel outlet 127, And the third solenoid valve 133 is operated to close the discharge port of the injection amount measurement chamber 131. [

In operation of the fuel supplier 110, the fuel pump unit 112 pumps the fuel contained in the fuel tank 111 and provides the fuel to the fuel injection line. At this time, the electronic regulator 114 may adjust the pressure of the fuel to adjust the pressure of the fuel supplied to the fuel injection line. At this time, the fuel pressure adjustment of the electronic regulator 114 is controlled by the control unit 150.

The fuel provided to the fuel injection line is injected through a plurality of injectors 116, respectively. The fuel injected from the plurality of injectors 116 is injected into the second accommodating space 134 of the plurality of injection amount measuring chambers 131 via a plurality of the cleaning and combining chambers 120 connected to the plurality of injectors 116, Respectively. This process is continued for a preset time in the control unit 150.

After a predetermined time in the control unit 150, the fuel amount measurement sensor 135 measures the fuel injection amount filled in the second accommodation space 134. [ Here, the fuel injection amount is the amount of fuel injected from the injector 116 for a certain period of time and accommodated in the injection amount measurement chamber 131.

When the fuel injection amount measured by the fuel amount measuring sensor 135 is within the error range of the reference injection amount on the basis of the reference injection amount that can be injected in the steady-state injector 116 for a predetermined time during a predetermined period of time If the fuel injection amount deviates from the reference amount by a margin of error, the injector 116 is automatically cleaned without any additional use.

Hereinafter, an injector performance test combined and cleaning method according to an embodiment of the present invention will be described.

Prior to the fuel injection amount test of the injector 116, the control unit 150 inputs the fuel pressure range supplied to the injector 116 to the control unit 150 and the pressure range of the fuel injected to the injector 116 The reference injection amount that is a reference value that can be injected for a predetermined time in the injector 116 is set in advance and the cleaning of the injector 116 is advanced when the fuel injection amount injected from the injector 116 differs from the error range of the reference injection amount The cleaning information is predefined.

Thereafter, in order to determine which of the injectors 116 is required to be cleaned, fuel is supplied to the plurality of injectors 116, and the fuel injection amount is measured through the fuel amount measuring unit. In this embodiment, the state in which the injector 116 is required to be cleaned refers to a case where the fuel injection quantity injected from the plurality of injectors 116 deviates from the error range of the reference injection quantity for a predetermined time.

In order to measure the fuel injection amount in the fuel amount measuring section, the following steps are performed. The fuel supply unit 110 is supplied with fuel by a plurality of injectors 116 and the first and second solenoid valves 144 and 145 of the cleaning unit 140 are controlled by the control unit 150, And the second solenoid valve 132 of the fuel amount measurement unit is unlocked. At this time, the fuel injected from the plurality of injectors 116 flows into the injection amount measurement chamber 131 via the plurality of cleaning and combining visualization chambers 120, and flows into the second accommodation space 134 of the injection amount measurement chamber 131 Is filled.

After a predetermined time has elapsed, the fuel injection amount filled in the injection amount measurement chamber 131 is measured by the fuel amount measurement sensor 135. [ Thereafter, the fuel injection amount test of each of the plurality of injectors 116 is performed by the control unit 150 so that the fuel injection amount measured by the fuel amount measurement sensor 135 falls within the error range of the reference injection amount set in advance by the control unit 150 Is compared.

As a result of the injector 116 fuel injection amount test, the injector 116 is cleaned when the fuel injection amount is different from the error range of the reference injection amount.

First, a step of removing foreign matter accumulated inside the injector 116 is executed. The foreign matter accumulated inside the injector 116 is removed by the pushing force of the high-pressure fuel.

The first a solenoid valve 144 is locked so that the washing liquid does not flow into the washing and combining chamber 120. The locked state of the second solenoid valve 132 and the third solenoid valve 133 is released so that the fuel injected from the injector 116 flows into the fuel tank 111. [

5, the control unit 150 controls the fuel supplier 110 so that high-pressure fuel within a pressure range of 200 bar to 300 bar is supplied to the injector 116 through the fuel supplier 110, do. At this time, considering the load applied to the injector 116, as shown in FIG. 5, the fuel pressure and the injecting interval are gradually raised for 90 seconds, and the cleaning process for injecting the fuel with the high pressure for 120 seconds or more into the injector 116 is performed And thereafter, has a decompression time of 90 seconds for the completion of the cleaning of the inside of the injector 116. In this process, the fuel circulates along the fuel circulation line (Fgasoline).

The injector performance testing and cleaning system 100 according to an embodiment of the present invention controls the injector 116 by controlling the control unit 150 in order to secure a sufficient cleaning power in 120 seconds of washing. It is preferable to operate such that high-pressure fuel is injected at an injection frequency. In the present embodiment, the inside of the injector 116 is cleaned of the foreign matter accumulated inside the injector 116 due to the injection of the high-pressure fuel.

Next, a step of washing the outside of the injector 116 is executed. The outside of the injector 116 is cleaned by a cleaning liquid. The first a solenoid valve 144 is released from the locked state so that the washing liquid is introduced into the washing and visualizing chamber 120 into which the injector 116 is inserted and the washing liquid introduced into the washing and visualizing chamber 120 is not discharged. The solenoid valve 145 is locked. The second solenoid valve 132 is locked so that the cleaning liquid introduced into the cleaning-use visualization chamber 120 does not flow into the injection amount measurement chamber 131.

The cleaning liquid is filled into the cleaning chamber 120 by the operation of the cleaning liquid pump 142 of the cleaning unit 140 according to the predetermined cleaning information in the control unit 150 up to a preset reference level in the control unit 150 . Subsequently, the cleaning liquid is ultrasonically vibrated by the operation of the ultrasonic wave generating member 146, and the outside of the injector 116 is cleaned by the ultrasonic vibrating cleaning liquid.

Then, when the external cleaning of the injector 116 is completed, the first b solenoid valve 145 is unlocked, the cleaning liquid flows to the cleaning liquid tank 141 of the cleaning unit 140, To be an empty space. Upon completion of the cleaning, the injector performance testing and cleaning system 100 according to an embodiment of the present invention can deliver the end of cleaning to the user through the display screen.

Meanwhile, the injector performance test combined and cleaning method according to an embodiment of the present invention includes a step of injecting fuel into the injector 116 through the display screen provided in the control unit 150, when the measured fuel injection amount value falls within the error range of the reference injection amount, Can be displayed. In this case, whether the injector 116 is cleaned or not is determined by the user.

At this time, the display screen may display a selection of the user to individually designate the respective test conditions and to test and clean the injector 116 by reflecting the user's specific intention.

The injector performance test combined and cleaning method according to an embodiment of the present invention includes a process of automatically cleaning the injector 116 when the fuel injection amount measured by the fuel amount measurement sensor 135 is out of the error range of the reference injection amount So that the convenience and efficiency of the engine maintenance task can be increased, and even if the expertise is insufficient, the GDI injector 116 can be inspected and cleaned to the level of a professional manpower.

100: Injector performance test Combined cleaning system
110: fuel supplier 111: fuel tank
112: fuel pump unit 113: fuel supply pipe
114: Electronic regulator 115: Fuel distribution line
116: Injector 120: Combined cleaning visualization chamber
121: first accommodation space 122: injector connecting opening
124: cleaning liquid inlet 125: member mounting opening
126: Cleaning liquid outlet 127: First fuel outlet
130: fuel amount measuring part 131: injection amount measuring chamber
132: second solenoid valve 133; The third solenoid valve
134: second accommodation space 135: fuel amount measuring sensor
136: injection fuel flow tube 137: measured fuel discharge tube
140: Cleaning section 141: Cleaning liquid tank
142: Washing liquid pump 143: Washing liquid inlet pipe
144: first 1a solenoid valve 145: first 1b solenoid valve
146: Ultrasonic generating member 147: Washing liquid discharging tube
148: Cleaning liquid discharge pipe 150:

Claims (13)

A fuel supplier having a plurality of injectors provided in a fuel distribution line connected to a fuel tank;
A plurality of washable visualization chambers respectively connected to the plurality of injectors, each of the plurality of washable visualization chambers receiving fuel injected from each of the plurality of injectors;
And a plurality of injection amount measurement chambers respectively connected between the plurality of the cleaning and use visible chambers and the fuel tank are provided and the fuel injection amount of the fuel injected from the injector and provided to the injection amount measurement chamber via the cleaning and combining chamber is measured A fuel amount measuring unit;
A cleaning unit connected to the cleaning-use visible-vision chamber through a closed-loop structure to provide a cleaning liquid to the cleaning-use visualization chamber and to clean the plurality of injectors when circulating the cleaning liquid; And
Wherein the control unit controls the fuel amount measuring unit to test whether the injector is in a state requiring cleaning, and when the state of the injector is in a state requiring cleaning And a controller for controlling the fuel supplier and the cleaner to operate the fuel supplier and the cleaner to clean the injector.
The apparatus according to claim 1, wherein the cleaning-
A first accommodation space in which the cleaning liquid or the fuel is received is provided inside,
An injector connection opening through which the injector is connected is provided in an upper portion of the cleaning and combining chamber,
A cleaning liquid inlet port through which the cleaning liquid flows and a member mounting opening through which the ultrasonic wave generating member is installed are provided on one side of the cleaning and combining visualization chamber,
A cleaning liquid discharge port through which the cleaning liquid is discharged and a first fuel discharge port through which the fuel is discharged are provided in a lower portion of the cleaning and combining chamber,
A first b-solenoid valve connected to the control unit and operable to open and close the cleaning liquid inlet, and a first b-solenoid valve connected to the control unit and operated to open and close the cleaning liquid discharge port, are connected to the cleaning- Injector performance test Combined cleaning system.
2. The fuel cell system according to claim 1,
The injection amount measuring chamber having a second accommodation space in which the fuel provided in the cleaning and combining chamber is accommodated, and a second fuel inlet and a second fuel outlet communicating with the second accommodation space;
A second solenoid valve installed between the second fuel inlet and the washing and visualizing chamber, the second solenoid valve being connected to the control unit and operated to open and close the second fuel inlet;
A third solenoid valve installed at the second fuel outlet and connected to the control unit to operate to open and close the second fuel outlet;
A fuel amount measurement sensor installed in the injection amount measurement chamber and measuring a fuel injection amount injected from the injector into the second accommodation space;
An injecting fuel flow pipe connecting the second fuel inlet and the washing and visualizing chamber; And
And a measured fuel discharge pipe connecting the second fuel outlet and the fuel tank.
The method of claim 3,
Wherein the control unit is configured to set a reference fuel injection amount that is a reference value that can be injected for a predetermined time from the injector in a steady state before the injector fuel injection amount test,
Wherein the control unit, when measuring the fuel injection amount,
The second solenoid valve is unlocked to open the second fuel inlet and the third solenoid valve is kept in a locked state to close the second fuel outlet so that the fuel injected from the plurality of injectors is discharged to the washing- To the second accommodating space via the visualization chamber,
Wherein the fuel injection amount of the fuel filled in the second accommodation space is measured by the fuel amount measurement sensor and then the injector is checked whether the injector is in a normal state or in a state requiring cleaning by comparing the measured fuel injection amount and the reference injection amount, The fuel injection amount test result is derived,
And after completion of the test, the third solenoid valve is unlocked to open the second fuel discharge port, so that the fuel accommodated in the second accommodation space flows to the fuel tank.
5. The apparatus of claim 4, wherein the control unit
Wherein the injector fuel injection quantity test is performed so that the injector is washed when the fuel injection quantity is equal to or larger than an error range of the reference injection quantity,
And the fuel supply unit supplies high-pressure fuel to the injector to clean the inside of the injector by the high-pressure fuel injection,
Wherein the cleaning unit provides the cleaning liquid to the cleaning and combining chamber so that the cleaning liquid cleans the outside of the injector.
The fuel supply system according to claim 1,
A fuel supply pipe connecting the fuel tank and the fuel distribution line;
A fuel pump connected to the fuel supply pipe for pumping fuel in the fuel tank; And
Further comprising an electronic regulator connected to the fuel supply pipe and the fuel tank, the electronic regulator being controlled by the control unit to adjust a pressure of the fuel flowing in the fuel supply pipe.
The washing machine according to claim 1,
A cleaning liquid tank containing the cleaning liquid;
A cleaning liquid pump incorporated in the cleaning liquid tank;
A cleaning liquid inlet pipe connected to the cleaning liquid pump and the cleaning and combining chamber;
A first solenoid valve for allowing or blocking the flow of the cleaning liquid discharged from the cleaning liquid pump to the plurality of cleaning and combining chambers for opening and closing the washing liquid inlet pipe, ;
A cleaning liquid discharge pipe connected to the cleaning liquid visualization chamber and the cleaning liquid tank;
A first b-solenoid valve installed in the cleaning-use visualization chamber for opening and closing the cleaning liquid discharge pipe, the first b-solenoid valve being connected to the control unit and allowing or blocking the flow of the cleaning liquid in the cleaning-use visualization chamber to the cleaning liquid tank; And
And an ultrasonic generating member connected to the cleaning-use visualization chamber and providing ultrasonic vibration to the cleaning liquid stored in the cleaning-use visualization chamber,
Wherein the ultrasonic wave generator vibrates the ultrasonic vibrator when the cleaning liquid is filled in the visualization chamber to a preset reference level in the control unit to cause the cleaning liquid to clean the injector.
8. The washing machine according to claim 7,
Further comprising a filter member connected to the washing liquid discharge pipe and filtering the filtrate present in the washing liquid supplied from the washing and vising chamber to the washing liquid tank.
8. The apparatus according to claim 7,
The first 1a solenoid valve is released from the locked state to allow the washing liquid to flow into the washing and visualizing chamber along the washing liquid inlet pipe,
The first b solenoid valve is kept in a locked state so that the cleaning liquid is not discharged to the outside of the cleaning and combining visualization chamber,
And the ultrasonic vibration generating unit is configured to cause the ultrasonic wave generating member to provide ultrasonic vibration to the ultrasonic wave generating member so that the outside of the injector is cleaned when the cleaning liquid is filled in the visible-
And after the completion of cleaning of the injector, the locking state of the first b solenoid valve is released so that the cleaning liquid is supplied to the cleaning liquid tank along the cleaning liquid discharge pipe.
A method of cleaning a plurality of injectors and a method of cleaning an injector performance test using the injector performance test combined cleaning system according to claim 1,
(a) before the injector fuel injection quantity test, a control section is provided with a pressure range of the fuel to be supplied to the injector, and a reference injection quantity which is a reference value which can be injected for a predetermined time in the injector in the steady state, The cleaning information being set such that the cleaning of the injector proceeds when the injection amount is different from the error range of the reference injection amount;
(b) fuel is supplied to the plurality of injectors by the fuel supply unit;
(c) the first-a solenoid valve and the first-b solenoid valve of the cleaning section are locked by the control ring of the control section, the second solenoid valve of the fuel amount measurement section is unlocked, and the fuel injected from the plurality of injectors Flowing into the injection amount measurement chamber via the plurality of cleaning and combining chambers;
(d) measuring a fuel injection amount filled in the injection amount measurement chamber for a predetermined time, comparing the fuel injection amount with the reference injection amount, and performing a fuel injection amount test of each of the plurality of injectors;
(e) when the numerical value of the fuel injection quantity measured in the step (d) is equal to or larger than the error range of the reference injection quantity in accordance with the washing information preset in the control unit, To thereby clean the inside of the injector;
(f) after the step (e), the washing liquid is supplied to the control unit to a preset reference level by unlocking the 1a solenoid valve and operating the washing liquid pump of the washing unit according to the washing information preset in the control unit Cleaning the outside of the injector while the cleaning liquid is ultrasonically vibrated by the operation of the ultrasonic wave generating member; And
(g) when the washing of the outside of the injector is completed by the step (f), the first b-solenoid valve is unlocked, and the washing liquid flows to the washing liquid tank of the washing section Performance test combined cleaning method.
11. The method of claim 10,
And displaying whether the injector is cleaned through a display screen provided in the control unit when the numerical value of the fuel injection amount measured in the step (d) belongs to the error range of the reference injection amount Features an injector performance test combined with a cleaning method.
11. The method of claim 10,
In the step (e), the control unit supplies high-pressure fuel within a pressure range of 200 bar to 300 bar to the injector through the fuel supply unit to remove foreign matter accumulated in the injector due to injection of the high- Features an injector performance test combined with a cleaning method.
11. The method of claim 10,
Wherein the injector is operated to inject the fuel at an injection frequency of 1 kHz or more in the step (e).

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