Pressure stabilizing device for EGR (Exhaust Gas Recirculation) flow detection

Abstract

The utility model discloses a pressure stabilizing device for EGR flow detection, which comprises a compressor, a detection tool and a control box, the detection tool is arranged at the air outlet end of the compressor, the detection tool is electrically connected with the control box, and the output end of the control box is connected with the input end of the compressor; the detection tool comprises a pressure stabilizing cavity connected to the air outlet end of the compressor through an air inlet pipe, a valve to be detected is connected to an air outlet pipe of the pressure stabilizing cavity, differential pressure sensors are arranged at the two ends of the valve to be detected respectively, and the output ends of the differential pressure sensors are connected with the input end of a control box. A regulating valve is arranged on an air inlet pipe of the pressure stabilizing cavity, and the input end of the regulating valve is connected with the output end of the control box; a display screen is arranged on the control box, a control panel is arranged in the control box, the input end of the control panel is connected with the output end of the differential pressure sensor, and the output end of the control panel is connected with the input end of the display screen. According to the utility model, the operation steps are simplified, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of EGR flow detection, and more specifically to a voltage stabilizing device for EGR flow detection. Background Art

[0002] In recent years, with the rapid development of the automotive economy, automotive technology has also advanced at an ever-increasing pace, placing increasingly stringent demands on various components. This has also led to higher requirements for electronic throttles and EGR systems across various stages. Flow testing also presents numerous requirements, such as ensuring that the flow curves at various valve openings, at pressures of 5kPa and 10kPa, meet design requirements, and performing valve consistency testing.

[0003] Currently, flow tests typically use manually operated mechanical valves for pressure control. This is slow, impacting efficiency, and difficult, requiring considerable physical effort. This can be challenging, requiring a device that can quickly adjust pressure to facilitate pressure control and flow curve testing. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a voltage stabilizing device for EGR flow detection, which simplifies the operation steps and improves the detection efficiency.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0006] A pressure stabilizing device for EGR flow detection comprises a compressor for providing an air source, a detection tooling for detecting a valve to be tested, and a control box for analyzing the detection data, the detection tooling being arranged at the air outlet of the compressor, the detection tooling being electrically connected to the control box, and the output end of the control box being connected to the input end of the compressor; the detection tooling comprises a pressure stabilizing chamber connected to the air outlet end of the compressor through an air intake pipe for stabilizing the air pressure, the valve to be tested being connected to the air outlet pipe of the pressure stabilizing chamber, pressure differential sensors for detecting pressure differential data of the valve to be tested being respectively arranged at both ends of the valve to be tested, and the output end of the pressure differential sensor being connected to the input end of the control box; a regulating valve for adjusting the intake air flow of the pressure stabilizing chamber is arranged on the air intake pipe of the pressure stabilizing chamber, and the input end of the regulating valve is connected to the output end of the control box; a display screen is arranged on the control box for displaying the flow data measured by the valve to be tested, a control board for data analysis is arranged inside the control box, the input end of the control board is connected to the output end of the pressure differential sensor, and the output end of the control board is connected to the input end of the display screen.

[0007] To further optimize the technical solution, the control board is provided with a power management circuit for providing power supply, a pressure input detection circuit for analyzing data collected by the pressure difference sensor, a CAN communication circuit for transmitting signals with the regulating valve, and a controller for performing data analysis. The output end of the power management circuit is connected to the power input end of the controller, the output end of the pressure input detection circuit is connected to the input end of the controller, and the controller is electrically connected to the CAN communication circuit.

[0008] To further optimize the technical solution, an SD card for storing test results is provided in the control box, an SD card storage circuit is provided on the control board, and the input end of the SD card storage circuit is connected to the output end of the controller.

[0009] To further optimize the technical solution, the control panel is connected to the regulating valve via a CAN bus.

[0010] To further optimize the technical solution, the control panel is connected to the compressor via a control line.

[0011] Further optimizing the technical solution, the display screen is a touchable liquid crystal display screen.

[0012] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows.

[0013] The utility model provides a pressure stabilizing device for EGR flow detection, which adjusts the gas pressure of the valve to be tested by controlling the opening of the regulating valve, collects the pressure at both ends of the valve to be tested by a pressure differential sensor, monitors the pressure and the opening of the regulating valve by a control box, and displays the pressure information on a display screen, so that the detection personnel can understand the current detection situation in real time, thereby simplifying the operation steps and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 Schematic diagram of the flow channel of the present utility model;

[0016] Figure 3 A circuit diagram of the power management circuit of the present utility model;

[0017] Figure 4 This is a circuit diagram of the pressure input detection circuit of the present utility model;

[0018] Figure 5 This is a circuit diagram of the CAN communication circuit of the present utility model;

[0019] Figure 6 This is a circuit diagram of the controller of the present utility model;

[0020] Figure 7 This is a circuit diagram of the SD card storage circuit of the present utility model.

[0021] Among them: 1. compressor, 2. intake pipe, 3. regulating valve, 4. pressure stabilizing chamber, 5. outlet pipe, 6. valve to be tested, 7. differential pressure sensor, 8. control box, 9. display screen, 10. CAN bus, 11. control line. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] A pressure stabilizing device for EGR flow detection, combined with Figures 1 to 2 As shown, it includes a compressor 1, a detection tooling and a control box 8. The compressor 1 is used to provide an air source, the detection tooling is used to monitor the valve to be tested 6, and the control box 8 is used to analyze the detection data. The detection tooling is arranged at the air outlet end of the compressor 1, and the detection tooling is electrically connected to the control box 8. The output end of the control box is connected to the input end of the compressor.

[0024] The detection tooling includes a pressure stabilizing chamber 4 and a pressure differential sensor 7. The pressure stabilizing chamber 4 is connected to the air outlet end of the compressor 1 through the air inlet pipe 2 to stabilize the air pressure. The valve to be tested 6 is connected to the air outlet pipe 5 of the pressure stabilizing chamber 4 for detection. Two pressure differential sensors 7 are set, which are respectively connected to the two ends of the valve to be tested 6 to monitor the pressure differential data of the valve to be tested. The output end of the pressure differential sensor is connected to the input end of the control box.

[0025] A regulating valve 3 is provided on the intake pipe 2 of the pressure stabilizing chamber 4 for regulating the intake flow of the pressure stabilizing chamber. The input end of the regulating valve is connected to the output end of the control box. The regulating valve 3 is connected to the control box through the CAN bus 10.

[0026] The control box 8 is connected to the compressor 1 via a control line 11 for controlling the start and stop of the compressor.

[0027] The control box 8 is provided with a display screen 9 for displaying the flow data measured by the valve to be tested. A control board is provided inside the control box 8 for analyzing the detected data. The input end of the control board is connected to the output end of the pressure difference sensor, and the output end of the control board is connected to the input end of the display screen.

[0028] The display screen is a touchable LCD screen, through which pressure parameters can be set. At the same time, the pressure data detected by the pressure sensor and the real-time opening data of the regulating valve can also be read.

[0029] The control board is provided with a power management circuit, a pressure input detection circuit, a CAN communication circuit and a controller. The output end of the power management circuit is connected to the power input end of the controller, the output end of the pressure input detection circuit is connected to the input end of the controller, and the controller is electrically connected to the CAN communication circuit.

[0030] The power management circuit is used to provide power supply. The circuit diagram of the power management circuit in this utility model is as follows Figure 3 shown.

[0031] The pressure input detection circuit is used to process the pressure data collected by the pressure differential sensor and transmit it to the controller. The circuit diagram of the pressure input detection circuit in this utility model is as follows: Figure 4 shown.

[0032] The CAN communication circuit is used to transmit signals to the regulating valve. The circuit diagram of the CAN communication circuit in the present invention is as follows: Figure 5 shown.

[0033] The controller is used to analyze the data collected by the pressure difference sensor and control the detection of the valve to be tested. The circuit diagram of the controller in this utility model is as follows: Figure 6 shown.

[0034] The control box 8 is provided with an SD card for storing the test results. The control board is provided with an SD card storage circuit. The SD card stores information through the SD card storage circuit. The input end of the SD card storage circuit is connected to the output end of the controller. The circuit diagram of the SD card storage circuit in the utility model is as follows: Figure 7 shown.

[0035] When the utility model detects the valve to be tested, the valve to be tested is installed on the test fixture and connected to the air outlet pipe of the pressure stabilizing chamber. Then, the pressure differential sensor is connected to the two air ports of the valve to be tested, and the pressure differential sensor is connected to the control box. The regulating valve is connected to the control box through the CAN bus. After the installation is completed, the control box is powered on, the compressor is started, and the pressure required for the test is set through the display screen. When the pressure stabilizes, the relevant data is recorded. At the same time, by observing the opening degree and pressure value of the pressure regulating valve, the pressure trend and the maximum measurement range under the current measurement conditions can be judged, which is convenient for the tester to have a prejudgment of the current test.

Claims

1. A voltage stabilizing device for EGR flow detection, characterized in that: The invention comprises a compressor (1) for providing an air source, a detection tool for detecting a valve to be detected (6), and a control box (8) for analyzing the detection data, wherein the detection tool is arranged at the air outlet of the compressor (1), the detection tool is electrically connected to the control box (8), and the output end of the control box is connected to the input end of the compressor; the detection tool comprises a pressure stabilizing chamber (4) for stabilizing air pressure connected to the air outlet end of the compressor (1) through an air inlet pipe (2), the valve to be detected (6) is connected to the air outlet pipe (5) of the pressure stabilizing chamber (4), and two ends of the valve to be detected (6) are respectively provided with pressure regulating chambers (5) for stabilizing air pressure. A differential pressure sensor (7) for measuring differential pressure data of the valve to be tested, wherein the output end of the differential pressure sensor is connected to the input end of the control box (8); a regulating valve (3) for regulating the intake flow rate of the pressure stabilizing chamber is provided on the intake pipe (2) of the pressure stabilizing chamber (4), wherein the input end of the regulating valve (3) is connected to the output end of the control box; a display screen (9) for displaying the flow rate data measured by the valve to be tested is provided on the control box (8), and a control board for performing data analysis is provided inside the control box, wherein the input end of the control board is connected to the output end of the differential pressure sensor, and the output end of the control board is connected to the input end of the display screen.

2. The voltage stabilizing device for EGR flow detection according to claim 1, characterized in that: The control board is provided with a power management circuit for providing power supply, a pressure input detection circuit for analyzing data collected by the pressure difference sensor, a CAN communication circuit for transmitting signals with the regulating valve, and a controller for performing data analysis. The output end of the power management circuit is connected to the power input end of the controller, the output end of the pressure input detection circuit is connected to the input end of the controller, and the controller is electrically connected to the CAN communication circuit.

3. The voltage stabilizing device for EGR flow detection according to claim 2, characterized in that: An SD card for storing detection results is provided in the control box (8), an SD card storage circuit is provided on the control board, and an input end of the SD card storage circuit is connected to an output end of the controller.

4. The voltage stabilizing device for EGR flow detection according to claim 1, characterized in that: The control panel is connected to the regulating valve (3) via a CAN bus (10).

5. The voltage stabilizing device for EGR flow detection according to claim 1, characterized in that: The control panel is connected to the compressor (1) via a control line (11).

6. The voltage stabilizing device for EGR flow detection according to claim 1, characterized in that: The display screen (9) is a touchable liquid crystal display screen.

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