KR102584845B1 - Performance test method for remanufactured diesel injector and high pressure fuel pump - Google Patents

Abstract

The present invention relates to a performance testing method for remanufactured diesel injectors and high pressure fuel pumps. The performance test method of a remanufactured diesel injector and high-pressure fuel pump according to an embodiment of the present invention includes preparing a performance test device including a fuel tank, low-pressure fuel line, high-pressure fuel line, common rail, and fuel return line, diesel Steps of connecting the injector and high-pressure fuel pump to the performance test device, supplying performance test fuel from the fuel tank through the low-pressure fuel line and high-pressure fuel line and performing the performance test, and operating the fuel return line to It includes recovering the remaining fuel from the pump into the fuel tank.

Description

Performance test method for remanufactured diesel injectors and high pressure fuel pumps {PERFORMANCE TEST METHOD FOR REMANUFACTURED DIESEL INJECTOR AND HIGH PRESSURE FUEL PUMP}

The present invention relates to a performance test method for remanufactured diesel injectors and high-pressure fuel pumps, and more specifically, to remanufactured diesel injectors that improve the efficiency of performance tests by recovering fuel remaining in diesel injectors and high-pressure fuel pumps after the performance test. and a performance test method for high-pressure fuel pumps.

Manufacturing refers to recovering used products or parts that are in the disposal stage and going through a series of processes such as disassembly, cleaning, inspection, repair/adjustment, and reassembly to restore the original function and performance of the product and re-commercialize it. Remanufacturing can reduce carbon emissions, energy, and resource consumption compared to the production or recycling process of new products, reduce production costs by reusing the core values contained in the product, and enable the supply of products to consumers at a low price. There is an advantage.

In Korea, remanufacturing of automobile parts is most active, and among the remanufactured items jointly announced by the Ministry of Trade, Industry and Energy and the Ministry of Environment, automobile parts include diesel injectors, common rail fuel pumps, and high-pressure fuel pumps.

Meanwhile, in order to promote remanufacturing, it is most important to secure the quality reliability of remanufactured products. To this end, performance testing procedures are essential to inspect the performance of remanufactured products before supplying them to the market.

Performance tests are also required for remanufactured diesel injectors and high-pressure fuel pumps. Performance testing of remanufactured diesel injectors and high-pressure fuel pumps is conducted by connecting remanufactured parts to a performance test device, supplying performance test fuel, and testing the fuel discharge amount, injection amount, reaction time, etc.

However, according to the conventional performance test method for remanufactured diesel injectors and high-pressure fuel pumps, in the process of dismantling the remanufactured parts from the performance test device after the performance test is completed, the fuel used in the performance test is exposed to the performance test device as is. There is a problem with performance test equipment becoming contaminated. Additionally, after performance testing of remanufactured diesel injectors and high-pressure fuel pumps, problems such as fuel sticking inside the remanufactured product may occur.

Accordingly, there is a need for a performance test method that can be efficiently performed while preventing problems of contamination by residual fuel when testing the performance of remanufactured diesel injectors and high-pressure fuel pumps.

Registered Patent Publication No. 1693978 (January 6, 2017)

The present invention is intended to solve the problems of the prior art described above, and its purpose is to provide a performance test method that can prevent contamination of the performance test device by fuel used in the performance test of remanufactured diesel injectors and high-pressure fuel pumps. There is.

In addition, the purpose of the present invention is to provide an efficient and economical performance test method by reducing the fuel used for performance testing of remanufactured diesel injectors and high-pressure fuel pumps.

Additionally, the purpose of the present invention is to provide a performance test method that allows control of performance test devices for remanufactured diesel injectors and high-pressure fuel pumps in a simple manner.

The performance test method of a remanufactured diesel injector and high-pressure fuel pump according to an embodiment of the present invention includes preparing a performance test device including a fuel tank, low-pressure fuel line, high-pressure fuel line, common rail, and fuel return line, diesel Steps of connecting the injector and high-pressure fuel pump to the performance test device, supplying performance test fuel from the fuel tank through the low-pressure fuel line and high-pressure fuel line and performing the performance test, and operating the fuel return line to It includes recovering the remaining fuel from the pump into the fuel tank.

According to one embodiment of the present invention, the high-pressure fuel line may include a first high-pressure fuel line and a second high-pressure fuel line, and in the step of connecting to the performance test device, the high-pressure fuel pump is connected to the first high-pressure fuel line. It is connected to a common rail, and the diesel injector can be connected to the common rail through a second high-pressure fuel line.

According to one embodiment of the present invention, in the step of recovering the remaining fuel to the fuel tank, the fuel return line can be operated by applying pressure to the high-pressure fuel line and the low-pressure fuel line and delivering air.

According to an embodiment of the present invention, the fuel return line may include a first fuel return line and a second fuel return line, and in the step of connecting to the performance test device, the high-pressure fuel pump and the diesel injector are respectively used as first fuel. It can be connected to the fuel tank through the return line and the second fuel return line, and in the stage of recovering the remaining fuel to the fuel tank, the first fuel return line and the second fuel return line operate to remove the remaining fuel from the high-pressure fuel pump and diesel injector. Fuel can be returned to the fuel tank through the first fuel return line and the second fuel return line, respectively.

According to one embodiment of the present invention, recovery of residual fuel of the high-pressure fuel pump through the first fuel return line and recovery of residual fuel of the diesel injector through the second fuel return line may be performed sequentially.

According to one embodiment of the present invention, the performance test device may be configured to enable ON/OFF settings, and a step of performing a performance test is performed when the performance test device is in the ON state, and when the performance test device is in the OFF state, a step of performing a performance test is performed. In this case, a step of recovering the remaining fuel into the fuel tank may be performed.

According to one embodiment of the present invention, contamination of the performance test device by residual fuel can be prevented by recovering residual fuel after performance testing of a remanufactured diesel injector and high-pressure fuel pump.

In addition, the fuel used in performance tests can be reduced by recovering residual fuel, thereby increasing the efficiency of performance tests.

In addition, the performance test device for remanufactured diesel injectors and high-pressure fuel pumps is configured to enable ON/OFF settings, so performance tests and residual fuel recovery can be performed in a simple manner.

1 is a diagram schematically showing a remanufactured diesel injector and high-pressure fuel pump performance test device according to an embodiment of the present invention.
Figure 2 is a flow chart sequentially showing a performance test method of a remanufactured diesel injector and a high-pressure fuel pump according to an embodiment of the present invention.
Figure 3 is a diagram showing the flow of performance test fuel during a performance test in a performance test device according to an embodiment of the present invention.
Figure 4 is a diagram showing the flow of residual fuel during residual fuel recovery in a performance test device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail so that a person skilled in the art can easily implement the present invention.

In order to clearly explain the present invention, descriptions of parts unrelated to the present invention have been omitted, and like reference numerals are assigned to like components throughout the specification. In addition, the size, thickness, position, etc. of each component shown in the drawings are arbitrarily shown for convenience of explanation, so the present invention is not necessarily limited to what is shown. That is, the specific shape, structure, and characteristics described in the specification can be changed and implemented from one embodiment to another without departing from the spirit and scope of the present invention, and the location or arrangement of individual components is also within the spirit and scope of the present invention. It should be understood that changes can be made without departing from the scope.

Accordingly, the detailed description described below is not to be taken in a limiting sense, and the scope of the present invention should be taken to encompass the scope of the claims and all equivalents thereof.

1 is a diagram schematically showing a remanufactured diesel injector and high-pressure fuel pump performance test device according to an embodiment of the present invention. Referring to FIG. 1, the remanufactured diesel injector and high-pressure fuel pump performance test device (hereinafter referred to as performance test device) 100 according to an embodiment of the present invention includes a fuel tank 110, a low-pressure fuel line 120, and a high-pressure fuel pump. It may include a fuel line 130, a common rail 140, a fuel return line 150, a fuel pressure sensor 160, a fuel pressure regulator 170, and a control unit (not shown). As shown, the performance test device 100 is used to test the performance of the remanufactured diesel injector 10 and the high pressure fuel pump 20 by connecting them.

The fuel tank 110 of the performance test device 100 according to an embodiment of the present invention functions to store fuel used in the performance test. The fuel stored inside the fuel tank 110 is a remanufactured diesel injector 10 and a high-pressure fuel pump ( 20) can be supplied.

According to one embodiment of the present invention, a low-pressure fuel pump and filter may be installed in the fuel tank 110. The low-pressure fuel pump can perform the function of supplying the performance test fuel in the fuel tank 110 to the high-pressure fuel pump 20 at a relatively low pressure, and the filter can supply the performance test fuel transferred to the high-pressure fuel pump 20. It can perform the function of removing foreign substances or impurities.

The fuel tank 110 can be manufactured with the same capacity as the fuel tank of a general vehicle, for example, 40 liters, and the temperature of the performance test fuel stored inside the fuel tank 110 is maintained at about 40 to 60 ° C. It can be configured to be possible. However, a person skilled in the art can easily understand that the capacity of the fuel tank, the temperature of the performance test fuel, etc. may be changed depending on the purpose or subject of the performance test.

The low-pressure fuel line 120 of the performance test device 100 according to an embodiment of the present invention connects the fuel tank 110 and the high-pressure fuel pump 20, and the performance test device according to an embodiment of the present invention ( The high-pressure fuel line 130 of 100 connects the high-pressure fuel pump 20, the common rail 140, and the diesel injector 10, and performs the function of transferring performance test fuel, respectively.

According to an embodiment of the present invention, the high-pressure fuel line 130 includes a first high-pressure fuel line 131 configured to connect the high-pressure fuel pump 20 and the common rail 140, the common rail 140, and the diesel injector. It may include a second high-pressure fuel line 133 configured to connect (10). One end of the first high-pressure fuel line 131 is connected to the high-pressure fuel pump 20 and the other end is connected to the common rail 140, so that the high-pressure performance test fuel supplied from the high-pressure fuel pump 20 is connected to the common rail (140). ) is transferred to. One end of the second high-pressure fuel line 133 is connected to the common rail 140 and the other end is connected to the diesel injector 10, and transfers the performance test fuel supplied from the common rail 140 to the diesel injector 10. . A plurality of second high-pressure fuel lines 133 may be installed corresponding to the number of diesel injectors 10.

The common rail 140 of the performance test device 100 according to an embodiment of the present invention stores the high-pressure performance test fuel transferred through the high-pressure fuel line 131 and supplies the performance test fuel to the diesel injector 10. It performs the function of supplying at a constant pressure. For this purpose, a fuel pressure sensor 160 and a fuel pressure regulator 170 may be installed on the common rail 140.

The fuel pressure sensor 160 may be installed on one side of the common rail 140, for example, at the part where the high-pressure fuel line 131 and the common rail 140 are connected, and detects the internal pressure of the common rail 140. It can perform the function: The fuel pressure regulator 170 may be installed on the opposite side of the portion where the fuel pressure sensor 160 is installed, and may perform a function of controlling the internal pressure of the common rail 140 to remain constant. In this embodiment, the fuel pressure regulator 170 may be configured to control the internal pressure of the common rail 140 based on the internal pressure of the common rail 140 detected by the fuel pressure sensor 160.

The fuel return line 150 of the performance test device 100 according to an embodiment of the present invention connects the diesel injector 10 and the high-pressure fuel pump 20 with the connection tank 110 to remove the remaining fuel after the performance test is completed. It performs the function of recovering fuel.

According to one embodiment of the present invention, the fuel return line 150 is a first fuel return line configured to connect the fuel tank 110 and the high pressure fuel pump 20 to recover the remaining fuel of the high pressure fuel pump 20. 151 and a second fuel return line 153 configured to connect the fuel tank 110 and the diesel injector 10 to recover the remaining fuel of the diesel injector 10. According to this embodiment, after the performance test by the first fuel return line 151 and the second fuel return line 153, the remaining fuel in the high pressure fuel pump 20 and the diesel injector 10 is transferred to the fuel tank 110. By being recovered, performance test fuel can be saved and reused.

The fuel return line 150 may be operated by applying pressure to the high-pressure fuel line 130 and the low-pressure fuel line 120 and transmitting air accordingly. Specifically, when the performance test is completed, the supply of performance test fuel from the fuel tank 110 is stopped and the fuel return line 150 is opened, as will be described later, and the high pressure fuel line 130 and the low pressure fuel line 120 are opened. ), and the remaining fuel inside the diesel injector 10 and the high-pressure fuel pump 20 is transferred to the fuel return line 150 by the pressure of the air, thereby recovering the remaining fuel.

In this way, the present invention solves the problem of device contamination by residual fuel and reduces fuel usage by recovering the fuel remaining in the diesel injector 10 and the high-pressure fuel pump 20 through the fuel return line 150 after the performance test is completed. can save.

The control unit (not shown) of the performance test device 100 according to an embodiment of the present invention is connected to each component of the performance test device 100 and performs the function of changing the settings of the performance test device and controlling its operation. . According to this embodiment, the control unit may be configured to control the performance test operation and residual fuel recovery operation of the performance test device. For example, the control unit may be configured to set an ON state in which a performance test is performed and an OFF state in which residual fuel recovery is performed.

Figure 2 is a flowchart sequentially showing a performance test method of a remanufactured diesel injector and a high pressure fuel pump according to an embodiment of the present invention. Hereinafter, with reference to the drawings, a remanufactured diesel injector and a high pressure fuel pump according to an embodiment of the present invention are shown. Describes the fuel pump performance test method.

Referring to Figure 2, the performance test method of a remanufactured diesel injector and a high-pressure fuel pump according to an embodiment of the present invention includes preparing a performance test device (S110) and connecting the remanufactured product to the performance test device (S110). S120), performing a performance test (S130), and recovering residual fuel (S140).

In the step of preparing the performance test device, the performance test device 100 is prepared for the performance test of the remanufactured diesel injector 10 and the high pressure fuel pump 20 (S110). As described above, the remanufactured diesel injector and high-pressure fuel pump performance test device 100 includes a fuel tank 110, a low-pressure fuel line 120, a high-pressure fuel line 130, a common rail 140, and a fuel return line ( 150), etc. Since each configuration has been described above, its description is omitted here.

Next, in the step of connecting the remanufactured product to the performance test device, the remanufactured diesel injector 10 and the high pressure fuel pump 20, which are test subjects, are connected to the performance test device 100 (S120). The diesel injector 10 can be connected to the common rail 140 through the second high-pressure fuel line 133, and a performance test can be performed by connecting a plurality of diesel injectors 10. The high-pressure fuel pump 20 can be connected to the fuel tank 110 through the low-pressure fuel line 120, and can be connected to the common rail 140 through the first high-pressure fuel line 131. Additionally, the diesel injector 10 and the high-pressure fuel pump 20 can be respectively connected to the fuel return line 150. At this time, each component of the performance test device and the remanufactured product subject to the performance test may be connected through a valve that can be adjusted to open and close.

In the step of performing a performance test after connecting the device, the performance test device 100 is set to ON, and accordingly, the performance test fuel flows from the fuel tank 110 through the low-pressure fuel line 120 and the high-pressure fuel line 130. It is supplied to remanufactured products subject to performance testing and performance testing is performed (S130).

Figure 3 is a diagram showing the flow of performance test fuel during a performance test in a performance test device according to an embodiment of the present invention, for example, when the performance test device is in an ON state.

Referring to FIG. 3, the fuel supplied from the fuel tank 110 is transferred to the high pressure fuel pump 20 through the low pressure fuel line 120 by the low pressure fuel pump installed in the fuel tank 110, and the high pressure fuel pump The fuel pumped from (20) is supplied to the common rail 140 along the first high-pressure fuel line 131, and is supplied from the common rail 140 to each diesel injector 10 through the second high-pressure fuel line 133. is distributed as Depending on the supply of performance test fuel, tests such as fuel discharge amount and high pressure maintenance test may be performed on the high-pressure fuel pump 20, and tests such as measurement of fuel injection amount and injection reaction time may be performed on the diesel injector 10. It can be.

When the performance test is completed, the fuel return line 150 operates to recover the residual fuel of the diesel injector 10 and the high-pressure fuel pump 20 to the fuel tank 110 (S140) ).

Figure 4 is a diagram showing the flow of residual fuel during recovery of residual fuel in a performance test device according to an embodiment of the present invention, for example, when the performance test device is in an OFF state.

When the fuel return line 150 operates, the remaining fuel inside the high-pressure fuel pump 20 can be transferred through the first fuel return line 151, and the remaining fuel inside the diesel injector 10 can be transferred through the second fuel return line. It can be transferred through (153). And the remaining fuel transferred through the first fuel return line 151 and the second fuel return line 153 is finally recovered to the fuel tank 110 and can be reused during performance tests.

According to one embodiment of the present invention, the operation of the fuel return line 150 may be performed sequentially. For example, pressure is applied to the low-pressure fuel line 120 and air is delivered to operate the first fuel return line 151, so that the remaining fuel inside the high-pressure fuel pump 20 is first recovered, Then, pressure is applied to the high-pressure fuel line 130 to operate the second fuel return line 153, so that the remaining fuel inside the diesel injector 10 can be recovered. Alternatively, the operation of the first fuel return line 151 and the second fuel return line 153 may be performed simultaneously or in the reverse order.

According to the performance test method of the remanufactured diesel injector and high-pressure fuel pump described above, the fuel remaining in the remanufactured product is recovered in a simple manner by controlling the pressure of the high-pressure fuel line and the low-pressure fuel line after the performance test. Contamination of the performance test device by fuel can be prevented. In addition, the fuel used in performance tests can be reduced by recovering residual fuel, thereby increasing the efficiency of performance tests.

Although the present invention has been described above with reference to specific details such as specific components and limited examples, the examples are provided only to facilitate a more general understanding of the present invention, and the present invention is not limited thereto. Anyone with ordinary knowledge in the relevant technical field can make various modifications and variations from this description.

Accordingly, the spirit of the present invention should not be limited to the embodiments described above, and all modifications equivalent to or equivalent to the claims as well as the claims described below shall fall within the scope of the spirit of the present invention. will be.

10: diesel injector
20: High pressure fuel pump
100: Performance test device
110: Fuel tank
120: Low pressure fuel line
130: High pressure fuel line
140: common rail
150: Fuel return line
160: Fuel pressure sensor
170: Fuel pressure regulator

Claims (6)

As a performance test method for remanufactured diesel injectors and high pressure fuel pumps,
Preparing a performance test device including a fuel tank, low-pressure fuel line, high-pressure fuel line, common rail, and fuel return line,
Connecting a diesel injector and a high-pressure fuel pump to the performance test device,
Supplying performance test fuel from the fuel tank through the low-pressure fuel line and the high-pressure fuel line and performing a performance test;
Operating the fuel return line to recover residual fuel from the diesel injector and the high-pressure fuel pump to the fuel tank,
The fuel return line includes a first fuel return line and a second fuel return line,
In the step of connecting to the performance test device, the high-pressure fuel pump and the diesel injector are connected to the fuel tank through the first fuel return line and the second fuel return line, respectively, through valves that can be adjusted to open and close. connect,
In the step of recovering the remaining fuel to the fuel tank, the first fuel return line and the second fuel return line are opened, pressure is applied to the high pressure fuel line and the low pressure fuel line, and air is delivered to the fuel return line. Residual fuel from the high-pressure fuel pump and the diesel injector is returned to the fuel tank through the first fuel return line and the second fuel return line, respectively,
The performance test device is configured to enable ON/OFF settings,
When the performance test device is in the ON state, the step of performing the performance test is performed, and when the performance test device is in the OFF state, the step of recovering the residual fuel to the fuel tank is performed.
method. According to paragraph 1,
The high-pressure fuel line includes a first high-pressure fuel line and a second high-pressure fuel line,
In the step of connecting to the performance test device, the high-pressure fuel pump is connected to the common rail through the first high-pressure fuel line, and the diesel injector is connected to the common rail through the second high-pressure fuel line. . delete delete According to paragraph 1,
Method, wherein recovery of residual fuel of the high-pressure fuel pump through the first fuel return line and recovery of residual fuel of the diesel injector through the second fuel return line are performed sequentially. delete

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