A common rail valve test device

Abstract

The present invention belongs to the technical field of common rail valve detection, and discloses a common rail valve testing device. The common rail valve testing device includes a frame and a test bench, an oil delivery system, an oil supply system, a control system, and a detection device arranged on the frame. The test bench is used for installing the common rail valve. The oil delivery system includes an oil inlet pipe, a bypass pipe, and an oil return pipe communicated with an oil tank. When the common rail valve is opened, it can communicate the oil inlet pipe and the oil return pipe, and when the common rail valve is closed, it can communicate the oil inlet pipe and the bypass pipe. The oil supply system can deliver oil to the oil inlet pipe. The control system includes a valve control module for controlling the opening and closing of the common rail valve and a collection and calculation module for collecting various detection signals during the switching between the opening and closing of the common rail valve, and the collection and calculation module can generate test data. The display device can receive and display the test data. The common rail valve testing device provided by the present invention can integrate the tooling, control, signal collection, data calculation, and result display of the common rail valve, and further improve the detection efficiency of the common rail valve.

Description

Technical Field

[0001] The present invention relates to the technical field of common rail valve detection, and particularly to a common rail valve testing device. Background Art

[0002] The common rail valve is an important component on the engine. Important performance parameters such as the opening and closing response time and the opening and closing time of the common rail valve can affect the overall performance of the engine. In the testing process of the common rail valve, various external devices such as oil pipelines, control devices for controlling the operation of the common rail valve, various sensors for detecting the performance parameters of the common rail valve, and calculation devices for calculating data based on the measured performance parameters are required. However, in the prior art, the testing device for the common rail valve has poor integration, and there is no common rail valve testing device that integrates tooling, control, signal acquisition, and data calculation. This makes the operation process of equipment handling, equipment installation, and detection by the operator more complicated, affecting the detection efficiency and increasing the consumption of human and material resources. Summary of the Invention

[0003] The purpose of the present invention is to provide a common rail valve testing device to solve the problems of poor integration and low testing efficiency of the common rail valve testing device in the prior art.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A common rail valve testing device, comprising:

[0006] A frame provided with a test bench for installing a common rail valve;

[0007] An oil delivery system arranged on the frame, including an inlet pipe, a bypass pipe, and a return pipe that are sequentially connected to a fuel tank. The inlet pipe, the bypass pipe, and the return pipe can all be connected to the common rail valve. When the common rail valve is opened, the common rail valve connects the inlet pipe and the return pipe. When the common rail valve is closed, the common rail valve connects the inlet pipe and the bypass pipe;

[0008] An oil supply system arranged on the frame, the oil supply system is connected to the fuel tank and can deliver oil to the inlet pipe;

[0009] A control system arranged on the frame, the control system includes a valve control module and a collection and calculation module. The valve control module is communicatively connected to the common rail valve and can control the opening and closing of the common rail valve. The collection and calculation module is communicatively connected to the common rail valve and the valve control module respectively. The collection and calculation module can collect various detection signals during the switching process between the opening and closing of the common rail valve, and calculate and generate test data based on the various detection signals;

[0010] A display device is provided on the rack and is communicatively connected to the acquisition and calculation module. The display device is capable of receiving and displaying the test data.

[0011] Optionally, a mounting bracket is provided on the test bench. The common rail valve is disposed on the mounting bracket. The common rail valve is provided with a mounting hole, and the mounting bracket is correspondingly provided with a connection hole. The mounting hole and the connection hole are connected by a connecting member.

[0012] Optionally, the connection hole is provided with an internal thread, and the connecting member is correspondingly provided with an external thread. After the connecting member passes through the mounting hole, it is screwed to the connection hole.

[0013] Optionally, a switching valve is further provided on the rack. Two ends of the return oil pipe are respectively connected to the common rail valve and the switching valve. The switching valve is connected with a first oil outlet pipe and a second oil outlet pipe. Both the first oil outlet pipe and the second oil outlet pipe are communicated with the fuel tank. A back pressure valve is provided on the second oil outlet pipe. The switching valve can be switched between a first state and a second state. When the switching valve is in the first state, the switching valve connects the return oil pipe and the first oil outlet pipe. When the switching valve is in the second state, the switching valve connects the return oil pipe and the second oil outlet pipe.

[0014] Optionally, the return oil back pressure of the back pressure valve is set to 25 bar.

[0015] Optionally, the acquisition and calculation module includes a pressure acquisition and calculation module. The pressure acquisition and calculation module can acquire the pressure signal of the return oil pipe during the switching process between the opening and closing of the common rail valve, and calculate and generate the response time and the completion time for the common rail valve to switch between the opening and closing according to the pressure signal.

[0016] Optionally, the acquisition and calculation module includes a current acquisition and calculation module. The current acquisition and calculation module can acquire the drive current signal during the switching process between the opening and closing of the common rail valve, and calculate and generate the response time and the completion time for the common rail valve to switch between the opening and closing according to the drive current signal.

[0017] Optionally, the acquisition and calculation module includes a voltage acquisition and calculation module. The voltage acquisition and calculation module can acquire the drive voltage signal during the switching process between the opening and closing of the common rail valve, and calculate and generate the response time and the completion time for the common rail valve to switch between the opening and closing according to the drive voltage signal.

[0018] Optionally, a cooling system is further provided on the frame, and the cooling system can cool the hydraulic oil in the inlet pipe, the bypass pipe and the return pipe. Optionally, the display device further includes a printing module, and the printing module can print the test data.

[0019] Advantageous effects:

[0020] The common rail valve installation equipment provided by the present invention is provided with a test bench for installing a common rail valve on the frame, and also installed with an oil delivery system, an oil supply system, a control system and a display device. By setting the oil delivery system, after the common rail valve is installed on the test bench, the inlet pipe, the bypass pipe and the return pipe are respectively connected to the common rail valve, and an installation environment on the engine can be simulated for the common rail valve. The common rail valve has two working states of opening and closing. When the common rail valve is in the closed state, the common rail valve connects the inlet pipe and the bypass pipe, and the hydraulic oil in the fuel tank is transported to the inlet pipe through the oil supply system and then returns to the fuel tank through the bypass pipe, that is, the hydraulic oil does not flow through the common rail valve. When the common rail valve is in the open state, the common rail valve connects the inlet pipe and the return pipe, and the hydraulic oil in the fuel tank is transported to the inlet pipe through the oil supply system and can return to the fuel tank through the return pipe, that is, the hydraulic oil flows through the common rail valve and then returns to the fuel tank. The control system includes a valve control module and an acquisition and calculation module. The valve control module can control the opening and closing of the common rail valve to control the working state of the common rail valve. The acquisition and calculation module can acquire various detection signals during the opening and closing switching process of the common rail valve and generate test data. The display device is communicatively connected to the acquisition and calculation module to receive the test data and display the test data, and inform the operator of the final test result. The entire detection process can integrate the equipment tooling, working condition switching, signal acquisition, data calculation and result display of the common rail valve, making the test equipment highly integrated, making the operation process more convenient, and further improving the detection efficiency of the common rail valve. Description of the drawings

[0021] Figure 1 is a schematic structural diagram of the common rail valve test equipment of the present invention;

[0022] Figure 2 is a schematic structural diagram of the common rail valve test equipment of the present invention from another perspective;

[0023] Figure 3 is a schematic structural diagram of the test bench and the switching valve part of the present invention;

[0024] Figure 4 is a schematic structural diagram of the test bench of the present invention.

[0025] In the figure:

[0026] 100, Frame; 110, Inlet pipe; 120, Return pipe; 130, Bypass pipe; 140, Test bench; 141, Inlet port; 142, Bypass port; 143, Outlet port; 144, Mounting bracket; 1441, Connection hole; 150, Connector;

[0027] 200, Common rail valve; 300, Fuel supply system; 400, Control system; 500, Display device;

[0028] 600, Switching valve; 610, First outlet pipe; 620, Second outlet pipe; 630, Back pressure valve;

[0029] 700, Cooling system. Detailed implementation mode

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the accompanying drawings, rather than all the structures.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and to the right", and "above and on" the second feature includes the first feature being directly above and diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below and to the left", and "below and under" the second feature includes the first feature being directly below and diagonally below the second feature, or simply indicating that the first feature is at a lower horizontal height than the second feature.

[0033] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] This embodiment provides a common rail valve testing device. Referring to Figures 1 to 4 As shown, the common rail valve testing device includes a frame 100. A test bench 140 for installing the common rail valve 200 is provided on the frame 100. An oil delivery system, an oil supply system 300, a control system 400, and a display device 500 are also provided on the frame 100. The oil delivery system includes an inlet pipe 110, a bypass pipe 130, and a return pipe 120 that are sequentially connected to a fuel tank (the fuel tank is not marked in the figure). The inlet pipe 110, the bypass pipe 130, and the return pipe 120 can all be connected to the common rail valve 200. When the common rail valve 200 is opened, the common rail valve 200 connects the inlet pipe 110 and the return pipe 120. When the common rail valve 200 is closed, the common rail valve 200 connects the inlet pipe 110 and the bypass pipe 130. The oil supply system 300 is connected to the fuel tank and can deliver oil to the inlet pipe 110. The control system 400 includes a valve control module and an acquisition and calculation module. The valve control module is communicatively connected to the common rail valve 200 and can control the opening and closing of the common rail valve 200. The acquisition and calculation module is communicatively connected to the common rail valve 200 and the valve control module respectively. The acquisition and calculation module can acquire various detection signals during the switching process between the opening and closing of the common rail valve 200, and calculate and generate test data based on the various detection signals. The display device 500 is provided on the frame 100 and is communicatively connected to the acquisition and calculation module. The display device 500 can receive and display the test data.

[0035] In this embodiment, by setting up an oil delivery system, after installing the common rail valve 200 on the test bench 140, the inlet oil pipe 110, the bypass pipe 130, and the return oil pipe 120 are respectively connected to the common rail valve 200, which can simulate the installation environment of the common rail valve 200 on the engine. The common rail valve 200 has two working states: open and closed. When the common rail valve 200 is closed, the common rail valve 200 connects the inlet oil pipe 110 and the bypass pipe 130, and the oil in the fuel tank is transported to the inlet oil pipe 110 through the oil supply system 300 and then returns to the fuel tank through the bypass pipe 130, that is, the oil does not flow through the common rail valve 200. When the common rail valve 200 is in the open state, the common rail valve 200 connects the inlet oil pipe 110 and the return oil pipe 120, and the oil in the fuel tank is transported to the inlet oil pipe 110 through the oil supply system 300 and then can return to the fuel tank through the return oil pipe 120, that is, the oil flows through the common rail valve 200 and then returns to the fuel tank; the control system 400 includes a valve control module and a collection and calculation module. The valve control module can control the opening and closing of the common rail valve 200, and thus control the action state of the common rail valve 200. The collection and calculation module can collect various detection signals during the opening and closing switching process of the common rail valve 200 and generate test data. The display device 500 is communicatively connected to the collection and calculation module to receive the test data and display the test data, so as to inform the operator of the final test result, and thus complete a complete test process. The entire detection process can integrate the equipment tooling of the common rail valve 200, working condition switching, signal collection, data calculation, and result display, making the test equipment highly integrated, making the operation process more convenient, and further improving the detection efficiency of the common rail valve 200.

[0036] In this embodiment, the oil supply system 300 can be an oil pump or other oil supply equipment, and no more limitations are imposed here. In addition, the control principle and process of the valve control module for controlling the opening and closing of the common rail valve 200 are both prior arts, and no more elaboration is made here.

[0037] Specifically, referring to Figures 3 to 4As shown, the test bench 140 is respectively provided with an oil inlet 141, a bypass port 142 and an oil outlet 143. When the common rail valve 200 is installed on the test bench 140, the inlet pipe 110, the bypass pipe 130 and the return pipe 120 respectively pass through the oil inlet 141, the bypass port 142 and the oil outlet 143 and are then connected to the common rail valve 200. Further, an installation bracket 144 is arranged on the test bench 140, the common rail valve 200 is arranged on the installation bracket 144, the common rail valve 200 is provided with an installation hole, the installation bracket 144 is correspondingly provided with a connection hole 1441, and the installation hole and the connection hole 1441 are connected through a connecting member 150. In this embodiment, the arrangement of the installation bracket 144 provides an installation space for the common rail valve 200. When the common rail valve 200 is placed on the installation bracket 144, the installation hole on the common rail valve 200 and the connection hole 1441 on the installation bracket 144 can be correspondingly arranged. Then, the connecting member 150 is passed through the installation hole and then reliably connected to the connection hole 1441, so as to simply and reliably install the common rail valve 200 on the installation bracket 144. Preferably, the connection hole 1441 is provided with an internal thread, the connecting member 150 is correspondingly provided with an external thread, and the connecting member 150 is screwed to the connection hole 1441 after passing through the installation hole. In this embodiment, the connecting member 150 can be set as a bolt adapted to the aperture specification of the connection hole 1441, so as to realize the reliable connection between the common rail valve 200 and the installation bracket 144. This embodiment is not limited thereto, and the common rail valve 200 can also be reliably installed on the installation bracket 144 in other ways, which will not be elaborated herein.

[0038] In this embodiment, continue to refer to Figures 1 to 3 As shown, a switching valve 600 is further arranged on the frame 100. Two ends of the return pipe 120 are respectively connected to the common rail valve 200 and the switching valve 600. The switching valve 600 is connected with a first outlet pipe 610 and a second outlet pipe 620. Both the first outlet pipe 610 and the second outlet pipe 620 are communicated with the fuel tank. A back pressure valve 630 is arranged on the second outlet pipe 620. The switching valve 600 can switch between a first state and a second state. When the switching valve 600 is in the first state, the switching valve 600 connects the return pipe 120 and the first outlet pipe 610. When the switching valve 600 is in the second state, the switching valve 600 connects the return pipe 120 and the second outlet pipe 620.

[0039] The common rail valve 200 mainly includes two categories: monostable valves and bistable valves. The common rail valve testing equipment provided in this embodiment can be applicable to the testing of both monostable valves and bistable valves. Specifically, when used to test a monostable valve, the monostable valve is installed on the mounting bracket 144. Subsequently, the inlet oil pipe 110, the bypass pipe 130, and the return oil pipe 120 are respectively connected to the monostable valve. The operator controls the switching valve 600 to switch it to the first state. In the first state, the switching valve 600 connects the return oil pipe 120 and the first outlet oil pipe 610. When the monostable valve is opened and the switching valve 600 is in the first state, the oil in the fuel tank is transported to the inlet oil pipe 110 through the fuel supply system 300 and then flows through the return oil pipe 120 and the first outlet oil pipe 610 in sequence to return to the fuel tank. With this setting, the oil return back pressure of this part of the oil circuit of the first outlet oil pipe 610 can be maintained at 0 bar, thus meeting the testing requirements for the monostable valve. When used to test a bistable valve, the bistable valve is installed on the mounting bracket 144. Subsequently, the inlet oil pipe 110, the bypass pipe 130, and the return oil pipe 120 are respectively connected to the bistable valve. The operator controls the switching valve 600 to switch it to the second state. In the second state, the switching valve 600 connects the return oil pipe 120 and the second outlet oil pipe 620. When the bistable valve is opened and the switching valve 600 is in the second state, the oil in the fuel tank is transported to the inlet oil pipe 110 through the fuel supply system 300 and then flows through the return oil pipe 120 and the second outlet oil pipe 620 in sequence to return to the fuel tank. And by setting the back pressure valve 630, the back pressure valve 630 can set the oil return back pressure of this part of the oil circuit of the second outlet oil pipe 620 to a fixed value that meets the testing requirements, thus meeting the testing requirements for the bistable valve.

[0040] Furthermore, the oil return back pressure of the back pressure valve 630 is preferably set to 25 bar, so as to further meet the testing requirements for the bistable valve.

[0041] In this embodiment, the acquisition and calculation module includes a pressure acquisition and calculation module. The pressure acquisition and calculation module can acquire the pressure signal of the return oil pipe 120 during the switching process between the opening and closing of the common rail valve 200, and calculate and generate the response time and completion time for the switching between the opening and closing of the common rail valve 200 based on the pressure signal.

[0042] In this embodiment, the pressure signal of the return oil pipe is one of the detection signals that need to be acquired during the switching process between the opening and closing of the common rail valve 200. The response time and completion time for the opening and closing switching of the common rail valve 200 are calculated correspondingly according to the change of the pressure signal of the return oil pipe 120 during the switching process between the opening and closing of the common rail valve 200.

[0043] Specifically, the response time includes the valve opening response time and the valve closing response time of the common rail valve 200, and the completion time includes the valve opening completion time and the valve closing completion time of the common rail valve 200. A pressure sensor in communication connection with the pressure acquisition and calculation module is provided at the connection part between the oil return pipe 120 and the common rail valve 200. The pressure sensor can collect the pressure signal at the connection part between the oil return pipe 120 and the common rail valve 200, and send the pressure signal to the pressure acquisition and calculation module in real time. The built-in program in the pressure acquisition and calculation module records two pressure values. One pressure value is P1, corresponding to the valve opening response node of the common rail valve 200, and the other pressure value is P2, corresponding to the valve opening completion node of the common rail valve 200.

[0044] When the common rail valve 200 is in the closed state, the common rail valve 200 connects the inlet pipe 110 and the bypass pipe 130, that is, the oil path between the inlet pipe 110 and the bypass pipe 130 is conducted. At this time, no oil passes through the oil return pipe 120, and the pressure signal value measured by the pressure sensor is 0. When the valve control module sends an open valve signal to the common rail valve 200, the pressure acquisition and calculation module can record the time node T0 when the valve control module sends the open valve signal. After receiving the open valve signal, the common rail valve 200 switches its working state, that is, from the state of controlling the connection between the inlet pipe 110 and the bypass pipe 130 to the state of connecting the inlet pipe 110 and the oil return pipe 120. During the process of the gradual opening of the common rail valve 200, as the connection between the inlet pipe 110 and the oil return pipe 120 gradually becomes established, the pressure at the oil return pipe 120 gradually rises. During this process, the pressure sensor also sends the pressure signal to the pressure acquisition and calculation module in real time. When the pressure signal value measured by the pressure sensor rises from 0 to P1, the pressure acquisition and calculation module can record the time node T1 when the pressure signal value reaches P1, and calculate the valve opening response time of the common rail valve 200 according to the time interval between the time node T0 and the time node T1. With the continuous opening of the common rail valve 200, the pressure at the oil return pipe 120 continues to rise. When the pressure signal value measured by the pressure sensor rises to P2, the pressure acquisition and calculation module can record the time node T2 when the pressure signal value reaches P2, and calculate the valve opening completion time of the common rail valve 200 according to the time interval between the time node T0 and the time node T2.

[0045] The built-in program in the pressure acquisition and calculation module also records a pressure value P1', corresponding to the valve closing response node of the common rail valve 200. When the common rail valve 200 is in the open state, the common rail valve 200 connects the fuel inlet pipe 110 and the fuel return pipe 120, and the pressure signal value measured by the pressure sensor is P2. When the valve control module sends a valve closing signal to the common rail valve 200, the pressure acquisition and calculation module can record the time node T0' when the valve control module sends the valve closing signal. After receiving the valve closing signal, the common rail valve 200 switches its working state, that is, from the state of controlling the connection between the fuel inlet pipe 110 and the fuel return pipe 120 to the state of connecting the fuel inlet pipe 110 and the bypass pipe 130. As the common rail valve 200 gradually closes, the connection between the fuel inlet pipe 110 and the fuel return pipe 120 is gradually cut off, and the pressure at the fuel return pipe 120 also gradually decreases. During this process, the pressure sensor will also send pressure signals to the pressure acquisition and calculation module in real time. When the pressure signal value measured by the pressure sensor drops from P2 to P1', the pressure acquisition and calculation module can record the time node T1' when the pressure signal value reaches P1', and calculate the valve closing response time of the common rail valve 200 according to the time interval between the time node T0' and the time node T1'. As the common rail valve 200 continues to close, the pressure at the fuel return pipe 120 continues to decrease. When the pressure signal value measured by the pressure sensor drops to 0, the pressure acquisition and calculation module can record the time node T2' when the pressure signal value reaches 0, and calculate the valve closing completion time of the common rail valve 200 according to the time interval between the time node T0' and the time node T2'.

[0046] The opening response time, opening completion time, closing response time, and closing completion time are several important test data for the test of the common rail valve 200, which can effectively reflect the use performance of the common rail valve 200. Preferably, in this embodiment, the value of P1 is preferably set to 10 bar, the value of P2 is preferably set to 200 bar, and the value of P1' is preferably set to 180 bar.

[0047] Furthermore, the acquisition and calculation module includes a current acquisition and calculation module. The current acquisition and calculation module can acquire the drive current signal during the switching process of the common rail valve 200 between opening and closing, and calculate and generate the response time and completion time for the common rail valve 200 to switch between opening and closing according to the drive current signal.

[0048] Specifically, the drive current signal is also one of the detection signals that need to be acquired during the switching process of the common rail valve 200 between opening and closing. The response time and completion time for the opening and closing switching of the common rail valve 200 are calculated correspondingly according to the change of the drive current signal during the switching process of the common rail valve 200 between opening and closing.

[0049] A current sensor that communicates with the current acquisition and calculation module is provided on the common rail valve 200. The current sensor can collect the drive current signal of the common rail valve 200 and send the drive current signal to the current acquisition and calculation module in real time. The built-in program in the current acquisition and calculation module records three current values. One current value is I1, corresponding to the valve opening response node of the common rail valve 200; one current value is I2, corresponding to the valve opening completion node of the common rail valve 200; and one current value is I1', corresponding to the valve closing response node of the common rail valve 200.

[0050] When the common rail valve 200 is in the closed state, no oil passes through the return oil pipe 120, and the value of the drive current signal measured by the current sensor is 0. When the valve control module sends an open valve signal to the common rail valve 200, the current acquisition and calculation module can record the time node T when the valve control module sends the open valve signal A0 , the common rail valve 200 switches its working state after receiving the open valve signal, the oil inlet pipe 110 and the return oil pipe 120 are gradually connected, and the drive current of the common rail valve 200 also gradually increases. When the value of the drive current signal measured by the current sensor increases from 0 to I1, the current acquisition and calculation module can record the time node T when the value of the drive current signal reaches I1 A1 , and calculate the valve opening response time of the common rail valve 200 according to the time interval between the time node T A0 and the time node T A1 . As the common rail valve 200 continues to open, when the value of the pressure signal measured by the pressure sensor increases to I2, the current acquisition and calculation module can record the time node T when the value of the drive current signal reaches I2 A2 , and calculate the valve opening completion time of the common rail valve 200 according to the time interval between the time node T A0 and the time node T A2 . When the common rail valve 200 is in the open state, the common rail valve 200 connects the oil inlet pipe 110 and the return oil pipe 120, and the value of the drive current signal measured by the current sensor is I2. When the valve control module sends a valve closing signal to the common rail valve 200, the current acquisition and calculation module can record the time node T when the valve control module sends the valve closing signal A0 '. The common rail valve 200 switches its working state after receiving the valve closing signal. As the common rail valve 200 gradually closes, the connection between the oil inlet pipe 110 and the return oil pipe 120 is gradually cut off, and the drive current of the common rail valve 200 also gradually decreases. When the value of the drive current signal measured by the current sensor decreases from I2 to I1', the current acquisition and calculation module can record the time node T when the value of the drive current signal reaches I1' A1 ', and calculate according to the time node T A0 ' and the time node T A1The closing valve response time of the common rail valve 200 is calculated based on the time interval between '. As the common rail valve 200 continues to close, the drive current continues to decrease. When the value of the drive current signal measured by the current sensor drops to 0, the current acquisition calculation module can record the time node T when the value of the drive current signal reaches 0. A2 ', and based on the time node T A0 ' and the time node T A2 ' The closing valve completion time of the common rail valve 200 is calculated based on the time interval between.

[0051] Further, the acquisition calculation module includes a voltage acquisition calculation module. The voltage acquisition calculation module can acquire the drive voltage signal during the switching process between the opening and closing of the common rail valve 200, and calculate and generate the response time and completion time for the switching of the common rail valve 200 between opening and closing based on the drive voltage signal.

[0052] Specifically, the drive voltage signal is also one of the detection signals that need to be acquired during the switching process between the opening and closing of the common rail valve 200. The response time and completion time for the opening and closing switching of the common rail valve 200 are calculated correspondingly based on the change of the drive voltage signal during the switching process between the opening and closing of the common rail valve 200.

[0053] A voltage sensor communicatingly connected to the voltage acquisition calculation module is provided on the common rail valve 200. The voltage sensor can acquire the drive voltage signal of the common rail valve 200 and send the drive voltage signal to the voltage acquisition calculation module in real time. The built-in program in the voltage acquisition calculation module records three voltage values. One voltage value is U1, corresponding to the opening valve response node of the common rail valve 200; one voltage value is U2, corresponding to the opening valve completion node of the common rail valve 200; one voltage value is U1', corresponding to the closing valve response node of the common rail valve 200.

[0054] When the common rail valve 200 is in the closed state, no oil fluid passes through the return oil pipe 120, and the value of the drive voltage signal measured by the voltage sensor is 0. When the valve control module sends an opening valve signal to the common rail valve 200, the voltage acquisition calculation module can record the time node T when the valve control module sends the opening valve signal. B0 , and after receiving the opening valve signal, the common rail valve 200 switches its working state, and the inlet oil pipe 110 and the return oil pipe 120 are gradually connected. The drive voltage of the common rail valve 200 also gradually increases. When the value of the drive voltage signal measured by the voltage sensor increases from 0 to U1, the voltage acquisition calculation module can record the time node T when the value of the drive voltage signal reaches U1. B1 , and based on the time node T B0 and the time node T B1The opening response time of the common rail valve 200 is calculated based on the time interval between them. As the common rail valve 200 continues to open, when the pressure signal value measured by the pressure sensor increases to U2, the voltage acquisition and calculation module can record the time node T when the driving voltage signal value reaches U2 B2 , and based on the time node T B0 and the time node T B2 The opening completion time of the common rail valve 200 is calculated based on the time interval between them; when the common rail valve 200 is in the open state, the common rail valve 200 connects the fuel inlet pipe 110 and the return pipe 120, and the driving voltage signal value measured by the voltage sensor is U2. When the valve control module sends a closing valve signal to the common rail valve 200, the voltage acquisition and calculation module can record the time node T when the valve control module sends the closing valve signal B0 '. After receiving the closing valve signal, the common rail valve 200 switches its working state. As the common rail valve 200 gradually closes, the connection between the fuel inlet pipe 110 and the return pipe 120 is gradually cut off, and the driving voltage of the common rail valve 200 also gradually decreases. When the driving voltage signal value measured by the voltage sensor drops from U2 to U1', the voltage acquisition and calculation module can record the time node T when the driving voltage signal value reaches U1' B1 ', and based on the time node T B0 ' and the time node T B1 ' The closing response time of the common rail valve 200 is calculated based on the time interval between them. As the common rail valve 200 continues to close, the driving voltage continues to decrease. When the driving voltage signal value measured by the voltage sensor drops to 0, the voltage acquisition and calculation module can record the time node T when the driving voltage signal value reaches 0 B2 ', and based on the time node T B0 ' and the time node T B2 ' The closing completion time of the common rail valve 200 is calculated based on the time interval between them.

[0055] In this embodiment, the display device 500 is communicatively connected to the acquisition and calculation module. The display device 500 includes a display screen, and the display screen can display the received test data. The test data such as the opening response time, opening completion time, closing response time, and closing completion time calculated and generated in the acquisition and calculation module can be sent to the display device 500 and displayed on the display screen for the operator to observe. Further, the display device 500 further includes a printing module, and the printing module can print the test data. By setting the printing module, the printing module can print the test data such as the opening response time, opening completion time, closing response time, and closing completion time to generate an experiment report for the operator to use. The printing principle and printing process of the printing module are both prior arts and will not be elaborated here.

[0056] Preferably, continue to refer to Figures 1 to 2As shown, a plurality of universal casters are provided at the lower end of the frame 100. The setting of the universal casters can facilitate the operator to move the entire common rail valve testing device.

[0057] Furthermore, a cooling system 700 is also provided on the frame 100. The cooling system 700 can cool the oil in the inlet pipe 110, the bypass pipe 130, and the return pipe 120. During the testing process of the common rail valve 200, there are certain requirements for the temperature of the oil. By setting the cooling system 700, the cooling system 700 preferably includes multiple cooling pipelines respectively arranged beside the inlet pipe 110, the bypass pipe 130, and the return pipe 120. A coolant is provided in the cooling pipelines. During the testing process, the coolant can exchange heat with the oil in the corresponding inlet pipe 110, bypass pipe 130, and return pipe 120 to avoid the oil temperature being too high, thereby ensuring the stable progress of the testing process.

[0058] Furthermore, an oil heating device is also provided on the frame 100. When the common rail valve testing device is just started, the temperature of the oil in the fuel tank is relatively low and does not meet the testing conditions of the common rail valve 200. By setting the oil heating device, the temperature of the oil in the fuel tank can be quickly raised to the testing temperature after the common rail valve testing device is started, thereby ensuring the progress of the testing work.

[0059] It is worth mentioning that in this embodiment, the preferred control range of the working temperature of the oil during the testing process of the common rail valve 200 is 17°C - 25°C.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A common rail valve testing device, characterized in that, Including: A frame (100) provided with a test bench (140) for mounting a common rail valve (200); An oil delivery system provided on the frame (100), including an inlet pipe (110), a bypass pipe (130), and a return pipe (120) that are sequentially connected to a fuel tank. The inlet pipe (110), the bypass pipe (130), and the return pipe (120) can all be connected to the common rail valve (200). When the common rail valve (200) is opened, the common rail valve (200) connects the inlet pipe (110) and the return pipe (120). When the common rail valve (200) is closed, the common rail valve (200) connects the inlet pipe (110) and the bypass pipe (130); A fuel supply system (300) provided on the frame (100), the fuel supply system being connected to the fuel tank and capable of delivering oil to the inlet pipe (110); A control system (400) provided on the frame (100), the control system (400) including a valve control module and an acquisition and calculation module. The valve control module is communicatively connected to the common rail valve (200) and can control the opening and closing of the common rail valve (200). The acquisition and calculation module is communicatively connected to the common rail valve (200) and the valve control module respectively. The acquisition and calculation module can acquire various detection signals during the switching process of the common rail valve (200) between opening and closing, and calculate and generate test data based on the various detection signals; A display device (500) provided on the frame (100) and communicatively connected to the acquisition and calculation module. The display device (500) can receive and display the test data; An installation bracket (144) is provided on the test bench (140). The common rail valve (200) is provided on the installation bracket (144). The common rail valve (200) is provided with an installation hole, and the installation bracket (144) is correspondingly provided with a connection hole (1441). The installation hole and the connection hole (1441) are connected by a connecting member (150); The acquisition and calculation module includes a pressure acquisition and calculation module. The pressure acquisition and calculation module can acquire the pressure signal of the return pipe (120) during the switching process of the common rail valve (200) between opening and closing, and calculate and generate the response time and the completion time of the switching of the common rail valve (200) between opening and closing based on the pressure signal.

2. The common rail valve testing device according to claim 1, wherein, The connection hole (1441) is provided with an internal thread, and the connecting member (150) is correspondingly provided with an external thread. The connecting member (150) passes through the installation hole and is screwed to the connection hole (1441).

3. The common rail valve testing device according to claim 1, characterized in that A switching valve (600) is further provided on the frame (100). Two ends of the oil return pipe (120) are respectively connected to the common rail valve (200) and the switching valve (600). The switching valve (600) is connected with a first oil outlet pipe (610) and a second oil outlet pipe (620). Both the first oil outlet pipe (610) and the second oil outlet pipe (620) are communicated with the fuel tank. A back pressure valve (630) is provided on the second oil outlet pipe (620). The switching valve (600) can switch between a first state and a second state. When the switching valve (600) is in the first state, the switching valve (600) communicates the oil return pipe (120) with the first oil outlet pipe (610). When the switching valve (600) is in the second state, the switching valve (600) communicates the oil return pipe (120) with the second oil outlet pipe (620).

4. The common rail valve testing device according to claim 3, characterized in that, The oil return back pressure of the back pressure valve (630) is set to 25 bar.

5. The common rail valve testing device according to claim 1, characterized in that, The acquisition and calculation module further includes a current acquisition and calculation module. The current acquisition and calculation module can acquire the drive current signal during the switching process of the common rail valve (200) between opening and closing, and calculate and generate the response time and completion time of the common rail valve (200) for switching between opening and closing according to the drive current signal.

6. The common rail valve testing device according to claim 1, wherein The acquisition and calculation module further includes a voltage acquisition and calculation module. The voltage acquisition and calculation module can acquire the drive voltage signal during the switching process of the common rail valve (200) between opening and closing, and calculate and generate the response time and completion time of the common rail valve (200) for switching between opening and closing according to the drive voltage signal.

7. The common rail valve testing device according to claim 1, characterized in that, A cooling system (700) is further provided on the frame (100). The cooling system (700) can cool the oil in the oil inlet pipe (110), the bypass pipe (130) and the oil return pipe (120).

8. The common rail valve testing device according to claim 1, characterized in that, The display device (500) further includes a printing module. The printing module can print the test data.

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