Automatic test tool for performance of exhaust gas recirculation valve
By designing automated testing fixtures, the automatic docking and testing of exhaust gas recirculation valves were realized, solving the problems of complex operation and inability to work in conjunction with automated production lines in existing technologies, thereby improving testing efficiency and product quality.
Patent Information
- Application Number
- CN202520211205.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Existing exhaust gas recirculation valve performance testing fixtures are complex to operate, require manual valve replacement, cannot work in conjunction with automated production lines, increase the labor intensity of operators, and reduce work efficiency.
An automated testing fixture was designed, comprising a base, a sliding cylinder, a wiring protection box, a lifting power source, and a three-axis cylinder. The fixture automatically docks and positions the exhaust gas recirculation valve by pushing a fixed column with the cylinder. Combined with the automatic connection of the motor harness and sensor harness, the fixture achieves automated testing of the exhaust gas recirculation valve.
This technology enables convenient installation and testing of the exhaust gas recirculation valve, improves testing efficiency, is suitable for automated production lines, reduces the labor intensity of operators, and ensures product quality.
Smart Images
Figure CN223841462U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a pump and valve testing fixture, specifically a performance testing fixture for an exhaust gas recirculation valve used in automobiles. Background Technology
[0002] An exhaust gas recirculation (EGR) valve is an electromechanical integrated product used to guide exhaust gas back into the intake manifold for re-combustion and to regulate the recirculation flow. After gasoline burns in the engine, a portion of the exhaust gas can be re-entered into the intake manifold through the EGR valve to participate in combustion again. This process allows for more complete fuel combustion, reducing energy consumption; it also lowers the temperature of the engine combustion chamber, thus inhibiting NO₂ production. x The compound produces a compound that reduces heat loss and decreases engine load.
[0003] In the manufacturing of EGR valves, functional testing is a crucial step. It verifies the valve's functionality by driving it, checking if components such as the connector (connecting to the plug), sensors, and actuators meet design requirements. Existing performance testing fixtures for EGR valves are relatively complex to operate, requiring manual valve replacement and connection to the test connector. Furthermore, they cannot integrate with automated production lines, significantly reducing efficiency and increasing the workload for operators. Summary of the Invention
[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an automatic testing fixture for the performance of exhaust gas recirculation valves that is easy to install and test.
[0005] The objective of this invention is achieved through the following technical solution: an automatic testing fixture for the performance of an exhaust gas recirculation valve, comprising a base, on which a wiring protection box is mounted via a sliding cylinder, the wiring protection box being fitted with a plug, and the two ends of the wiring protection box being respectively connected to a motor wiring harness end and a sensor wiring harness end; a lifting power source is mounted on the upper part of the base and above the plug, and a fixed column is connected below the lifting power source.
[0006] The lifting power source is a three-axis cylinder, which is equipped with a throttle valve and a pilot check valve.
[0007] Both the slide cylinder and the three-axis cylinder are equipped with pressure reducing valves. The three-axis cylinder is equipped with a magnetic switch.
[0008] With the structure of this invention, a three-axis cylinder pushes a fixing column down onto the surface of the exhaust gas recirculation valve, serving a positioning and fixing function. A sliding cylinder pushes the wiring protection box and plug, automatically aligning the plug with the connector of the exhaust gas recirculation valve to be tested, facilitating the installation of the exhaust gas recirculation valve. The motor harness and sensor harness ends are connected to upper-level testing equipment (motor testing equipment, sensor testing equipment) respectively, and the relevant performance data of the exhaust gas recirculation valve are tested. This invention can be installed in the later stages of an automated exhaust gas recirculation valve production line, conveniently testing its relevant performance and ensuring the quality of the exhaust gas recirculation valve product. Attached Figure Description
[0009] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0010] Figure 1 This is a schematic diagram of the installation structure of the present invention (equipped with an exhaust gas recirculation valve and a support base).
[0011] Figure 2 for Figure 1 The installation diagram shows the base, slide cylinder, and wiring protection box. Detailed Implementation
[0012] Reference Figure 1 , Figure 2 As can be seen, the automatic testing fixture for the performance of the exhaust gas recirculation valve of the present invention includes a base 3, on which a wiring protection box 7 is mounted via a sliding cylinder 5. A plug 6 is mounted on the wiring protection box 7, and motor wiring harness end 71 and sensor wiring harness end 72 are respectively connected to the two ends of the wiring protection box 7. A lifting power source 12 is mounted on the upper part of the base 3 and above the plug 6 (via the cylinder seat 13), and a fixed column 4 is connected to the lower part of the lifting power source 12.
[0013] The lifting power source 12 is a three-axis cylinder, which is equipped with a throttle valve 9 and a pilot check valve 8. Both the slide cylinder and the three-axis cylinder are equipped with pressure reducing valves 10. The three-axis cylinder is equipped with a magnetic switch 11. The plug 6 is aligned with the connector of the exhaust gas recirculation valve 2 (i.e., EGR valve, mounted on the support base 1) to be tested, which is transported from the production line (the positions correspond).
[0014] The base 3 of this invention is placed on the working platform. When the exhaust gas recirculation valve 2 is transported to the side of the base 3 and plug 6, and directly below the fixing column 4, the three-axis cylinder pushes the fixing column 4 down onto the surface of the exhaust gas recirculation valve 2, thereby positioning and fixing it. The slide cylinder 5 pushes the wiring protection box 7 and plug 6, automatically connecting the plug 6 to the connector of the exhaust gas recirculation valve 2. The motor harness end 71 and sensor harness end 72 are respectively connected to the upper-level detection equipment (motor detection equipment and sensor detection equipment) to test the relevant performance data of the exhaust gas recirculation valve. The pilot check valve 8 prevents backflow of gas within the triaxial cylinder, stabilizing its pressure. The throttle valve 9 adjusts the air flow rate, controlling the cylinder's thrust. The pressure reducing valve 10 regulates the pressure of the slide cylinder and the triaxial cylinder, preventing excessive or insufficient pressure. The magnetic switch 11 detects the working position and motion state of the triaxial cylinder, enabling its start-up and shutdown. This allows for high-precision detection of the exhaust gas recirculation valve.
Claims
1. An automatic testing fixture for the performance of an exhaust gas recirculation valve, including a base, characterized in that: A wiring protection box is mounted on the base via a sliding cylinder. The wiring protection box is equipped with a plug, and the two ends of the wiring protection box are respectively connected to the motor wiring harness end and the sensor wiring harness end. A lifting power source is mounted on the upper part of the base and above the plug, and a fixed column is connected to the lower part of the lifting power source.
2. The automatic testing fixture for the performance of the exhaust gas recirculation valve as described in claim 1, characterized in that: The lifting power source is a three-axis cylinder, which is equipped with a throttle valve and a pilot check valve.
3. The automatic testing fixture for the performance of the exhaust gas recirculation valve as described in claim 2, characterized in that: The slide cylinder and the three-axis cylinder are both equipped with pressure reducing valves.
4. The automatic testing fixture for the performance of the exhaust gas recirculation valve as described in claim 2, characterized in that: The three-axis cylinder is equipped with a magnetic switch.
5. The automatic testing fixture for the performance of the exhaust gas recirculation valve as described in claim 1, characterized in that: The plug is connected to the connector of the exhaust gas recirculation valve to be tested.