Engine intake manifold flow test bench

Abstract

The utility model discloses an engine intake manifold flow test bench, and belongs to the technical field of engine test equipment. The frequency converter is electrically connected with the fan, the fan is communicated with the pressure stabilizing box, the pressure stabilizing box is provided with a butterfly valve, the pressure stabilizing box is communicated with the pressure stabilizing barrel through an air inlet channel, the air inlet channel is provided with an air inlet flow meter and an air inlet flow differential pressure sensor, the pressure stabilizing barrel is communicated with the momentum meter, and the momentum meter penetrates through the test bed table to be communicated with the simulation cylinder sleeve. The test bed table is connected with the simulation cylinder sleeve and provided with a valve lift adjusting mechanism, the valve lift adjusting mechanism is provided with a push rod, and the push rod is provided with a displacement sensor and driven by a stepping motor. Through technical innovation and system integration, a full-process solution from test design, data acquisition to performance evaluation is constructed, powerful technical support is provided for research and development, optimization and quality control of the engine intake manifold, and the engine intake manifold test system has profound significance in promoting technical progress and product upgrading of the engine industry.

Description

Technical Field

[0001] This utility model belongs to the technical field of engine testing equipment, specifically an engine intake manifold flow test bench. Background Technology

[0002] The intake manifold is a crucial engine component, guiding gas into the intake passages of each cylinder. Good intake manifold performance reduces engine intake resistance and lowers thermal load. However, current testing methods are insufficient to accurately measure gas flow within the intake manifold, hindering effective monitoring of each intake manifold during the development phase and posing after-sales risks to mass production. Utility Model Content

[0003] To address the problems existing in the background technology, this utility model provides an engine intake manifold flow test bench.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an engine intake manifold flow test bench, comprising a frequency converter, a fan, a pressure stabilizing box, a displacement sensor, a pressure stabilizing tank, a momentum meter, a simulated cylinder liner, a valve lift adjustment mechanism, a stepper motor, a test bench, an intake flow meter, an intake flow differential pressure sensor, an intake manifold, a push rod, and a butterfly valve.

[0005] The frequency converter is electrically connected to the fan, the fan is connected to the pressure stabilizing box, the pressure stabilizing box is equipped with a butterfly valve, the pressure stabilizing box is connected to the pressure stabilizing tank through the air intake duct, the air intake duct is equipped with an air intake flow meter and an air intake flow differential pressure sensor, the upper end of the pressure stabilizing tank is connected and fixed to a momentum meter, the momentum meter passes through the test bench and is connected to the simulated cylinder liner, the lower end of the test bench is fixedly connected to the momentum meter, the upper end of the test bench is fixedly connected to the simulated cylinder liner, the test bench is equipped with a valve lift adjustment mechanism, the valve lift adjustment mechanism is equipped with a push rod, the push rod is equipped with a displacement sensor, and the push rod is driven by a stepper motor.

[0006] The displacement sensor, momentum meter, intake flow meter, and intake flow differential pressure sensor are electrically connected to their respective data acquisition devices. Each data acquisition device is electrically connected to a computer via a data transmission line, and the computer is electrically connected to the frequency converter via a data transmission line.

[0007] Compared with the prior art, the beneficial effects of this utility model are:

[0008] 1. Precisely test flow characteristics: By precisely adjusting the fan speed through the frequency converter, and combining the pressure stabilizing box and butterfly valve to regulate the airflow, a stable and precisely controllable airflow environment is provided for the intake manifold. With the help of the intake flow meter to accurately measure the amount of air entering the intake manifold, the flow characteristics of the intake manifold can be accurately tested, providing an accurate basis for the design and optimization of the intake manifold.

[0009] 2. Comprehensive assessment of vortex or tumble intensity: By measuring the vortex or tumble intensity of the intake manifold using a momentum meter, the airflow characteristics of the intake manifold under different operating conditions can be comprehensively assessed. This helps to gain a deeper understanding of the impact of the intake manifold on the engine combustion process, thereby enabling targeted optimization and improvement.

[0010] 3. Precise control of valve lift: The valve lift adjustment mechanism, combined with the stepper motor-driven pushrod, enables precise control of valve lift. The displacement sensor measures the pushrod displacement in real time to obtain valve lift data, ensuring accurate simulation of valve opening degree during the test, making the test results closer to the actual working state of the engine and improving the accuracy of the test.

[0011] 4. Ensure test stability and reliability: The pressure stabilizing tank provides a constant pressure drop environment for the test, ensuring the stability of the airflow pressure during the test; the data transmission system of each sensor, data acquisition instrument, and computer can collect and record test data in real time and accurately, reducing human error; the device undergoes rigorous sealing tests to ensure that there is no air leakage at each connection point, further improving the stability and reliability of the test.

[0012] 5. Ensure intake manifold reliability: After the test, a reliability check is performed on the intake manifold, including visual inspection and connection inspection, to ensure that the intake manifold can still work normally after the test, providing a guarantee for subsequent use or further testing, and also helping to evaluate the durability of the intake manifold during the test.

[0013] 6. Comprehensive performance evaluation: As the command center of the entire testing system, the computer comprehensively evaluates the data collected by multiple acquisition instruments. Through preset algorithms and standards, it derives performance indicators such as the flow characteristics and vortex or tumble intensity of the intake manifold, providing comprehensive data support for the design and optimization of the intake manifold and helping to improve the overall performance of the engine.

[0014] In summary, this engine intake manifold flow test bench and test method, through technological innovation and system integration, has constructed a complete solution from test design and data acquisition to performance evaluation. It provides strong technical support for the research, development, optimization and quality control of engine intake manifolds, and has profound significance for promoting technological progress and product upgrades in the engine industry. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the test process of this utility model; Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0018] This embodiment describes an engine intake manifold flow test bench, including a frequency converter 1, a fan 2, a voltage regulator box 3, a displacement sensor 7, a voltage regulator tank 9, a momentum meter 10, a simulated cylinder liner 11, a valve lift adjustment mechanism 12, a stepper motor 13, a test bench 14, an intake flow meter 15, an intake flow differential pressure sensor 16, an intake manifold 17, a push rod 18, and a butterfly valve 19.

[0019] The frequency converter 1 is electrically connected to the fan 2, the fan 2 is connected to the pressure stabilizing box 3, the pressure stabilizing box 3 is equipped with a butterfly valve 19, the pressure stabilizing box 3 is connected to the pressure stabilizing tank 9 through the air intake duct 17, the air intake duct 17 is equipped with an air intake flow meter 15 and an air intake flow differential pressure sensor 16, the upper end of the pressure stabilizing tank 9 is connected and fixed to the momentum meter 10, the momentum meter 10 passes through the test bench 14 and is connected to the simulated cylinder liner 11, the lower end of the test bench 14 is fixedly connected to the momentum meter 10, the upper end of the test bench 14 is fixedly connected to the simulated cylinder liner 11, the test bench 14 is equipped with a valve lift adjustment mechanism 12, the valve lift adjustment mechanism 12 is equipped with a push rod 18, the push rod 18 is equipped with a displacement sensor 7, and the push rod 18 is driven by a stepper motor 13.

[0020] The displacement sensor 7, momentum meter 10, intake flow meter 15 and intake flow differential pressure sensor 16 are electrically connected to the corresponding data acquisition device 5. Each data acquisition device 5 is electrically connected to the computer 4 through a data transmission line. The computer 4 is electrically connected to the frequency converter 1 through a data transmission line.

[0021] The method includes the following steps:

[0022] S1. Install the intake manifold 6 onto the corresponding cylinder head 8 and perform a comprehensive inspection to ensure that it is installed correctly and can work properly;

[0023] S2. Use tooling to firmly fix the cylinder head 8 to the simulated cylinder liner 11 to ensure the stability and sealing of the connection;

[0024] S3. Ensure smooth connection between the intake manifold 6 and the simulated cylinder liner 11 so that air can flow smoothly;

[0025] S4. Finely adjust the position of the valve lift adjustment mechanism 12 so that the push rod 18 accurately corresponds to the valve on the cylinder head 8, in preparation for subsequent accurate control of valve lift.

[0026] S5. Conduct a rigorous sealing test on the entire device to check for any air leaks at each connection point. If the sealing test is successful, proceed to step S6; if it fails, make targeted adjustments to the device and conduct the sealing test again until it is successful.

[0027] S6. The stepper motor 13 drives the push rod 18 to open the valve on the cylinder head 8. At the same time, the displacement sensor 7 measures the displacement of the push rod 18 in real time to obtain the valve lift data. The data is transmitted to the corresponding data acquisition instrument 5 in sequence, and finally transmitted to the computer 4 for recording and analysis.

[0028] S7. Open the butterfly valve 19 on the pressure stabilizing box 3, and control the frequency converter 1 through the computer 4, thereby turning on the fan 2. The fan 2 runs to draw air into the intake manifold 6. The air flows through the simulated cylinder liner 11, momentum meter 10, pressure stabilizing tank 9, intake duct 17 and pressure stabilizing box 3 in sequence to form a stable airflow.

[0029] S8. Displacement sensor 7, momentum meter 10, air flow meter 15 and air flow differential pressure sensor 16 respectively collect their respective data through the corresponding data acquisition instrument 5, and accurately transmit these data to computer 4 for subsequent data analysis.

[0030] S9. Perform flow tests on each cylinder passage of the intake manifold 6 in a predetermined order, and perform at least two tests on each passage to ensure the accuracy and reliability of the test data. If a serious malfunction occurs during the test, such as equipment damage or abnormal data, the test shall be terminated immediately.

[0031] S10. Perform a reliability check on the intake manifold 6, including checking for any damage to its appearance and any loose connections, to ensure that the intake manifold can still work normally after the test, thus providing a guarantee for subsequent use or further testing.

[0032] S11. Finally, the computer 4 comprehensively evaluates the data collected by multiple acquisition instruments 5, and obtains the flow characteristics and vortex or tumble intensity performance indicators of the intake manifold through preset algorithms and standards, providing a basis for the design and optimization of the intake manifold.

[0033] The working principle of an engine intake manifold flow test bench is mainly based on the synergistic effect of its various components to achieve accurate testing of intake manifold flow. The following is a detailed explanation of the working principle of this test bench and its testing method:

[0034] The frequency converter 1 is used to adjust the speed of the fan 2, thereby controlling the airflow into the intake manifold. The fan 2 is responsible for providing the fresh air required for the test. The pressure stabilizing box 3 is connected to the fan 2 and has a butterfly valve 19 inside for regulating the airflow. The main function of the pressure stabilizing box 3 is to provide a stable airflow environment and ensure constant airflow pressure during the test. The displacement sensor 7 is used to measure the displacement of the push rod 18 in real time, thereby obtaining the valve lift data. The valve lift adjustment mechanism 12 is responsible for adjusting the valve opening degree. The stepper motor 13 drives the push rod 18 to move, thereby driving the valve lift adjustment mechanism 12 to adjust the valve lift. The precise control of the process is achieved through a constant pressure drop environment provided by the pressure stabilizing tank 9, a momentum meter 10 for measuring the intensity of vortex or tumble flow in the intake manifold, a simulated cylinder liner 11 for simulating the actual working environment of the engine, making the test closer to reality, an intake flow meter 15 for measuring the amount of air entering the intake manifold, and an intake flow differential pressure sensor 16 for measuring changes in intake manifold differential pressure. The data acquisition unit 5 is responsible for collecting data from each sensor and transmitting it to the computer 4 for processing and analysis. The computer 4, as the command center of the entire test system, is responsible for controlling the test process, recording data, and conducting subsequent data analysis.

[0035] Working principle of the test method:

[0036] Install the intake manifold 6 onto the corresponding cylinder head 8 and perform a comprehensive inspection. Securely connect the cylinder head 8 to the simulated cylinder liner 11 using a tooling (the tooling is existing technology, i.e., CN222049585U), ensuring smooth communication between the intake manifold 6 and the simulated cylinder liner 11. Conduct a rigorous sealing test on the entire device to ensure there are no leaks at any connection points. If the sealing test fails, make targeted adjustments to the device and retest until it passes. Drive the push rod 18 with the stepper motor 13 to open the valve on the cylinder head 8. The displacement sensor 7 measures the displacement of the push rod 18 in real time to obtain valve lift data. This data is transmitted to the computer 4 via the data acquisition device 5 for recording and analysis. Open the butterfly valve 19 on the pressure regulator 3 and connect it to the computer 4. The inverter 1 controls the start of the fan 2, which draws air into the intake manifold 6. The air then flows sequentially through the simulated cylinder liner 11, momentum meter 10, pressure stabilizing tank 9, intake duct 17, and pressure stabilizing box 3, forming a stable airflow. During this process, the displacement sensor 7, momentum meter 10, intake flow meter 15, and intake flow differential pressure sensor 16 collect their respective data through the corresponding data acquisition instruments 5, and transmit these data to the computer 4 for subsequent analysis. The computer 4 comprehensively evaluates the data collected by multiple data acquisition instruments 5, and, through preset algorithms and standards, derives the flow characteristics and vortex or tumble intensity performance indicators of the intake manifold. These data provide important basis for the design and optimization of the intake manifold.

[0037] In summary, this engine intake manifold flow test bench and testing method, through precise airflow control, real-time data acquisition, and comprehensive data analysis, achieves accurate testing and performance evaluation of intake manifold flow. Each component plays a crucial role in the testing process, collectively ensuring the accuracy and reliability of the test.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An engine intake manifold flow test bench, characterized in that: Includes frequency converter (1), fan (2), voltage regulator box (3), displacement sensor (7), voltage regulator tank (9), momentum meter (10), simulated cylinder liner (11), valve lift adjustment mechanism (12), stepper motor (13), test bench (14), intake flow meter (15), intake flow differential pressure sensor (16), intake manifold (17), push rod (18) and butterfly valve (19); The frequency converter (1) is electrically connected to the fan (2), the fan (2) is connected to the voltage regulator box (3), the voltage regulator box (3) is equipped with a butterfly valve (19), the voltage regulator box (3) is connected to the voltage regulator tank (9) through the air inlet (17), the air inlet (17) is equipped with an air flow meter (15) and an air flow differential pressure sensor (16), the upper end of the voltage regulator tank (9) is connected and fixed to the momentum meter (10), and the momentum meter (10) passes through the test bench. (14) is connected to the simulated cylinder liner (11). The lower end of the test bench (14) is fixedly connected to the momentum meter (10), and the upper end of the test bench (14) is fixedly connected to the simulated cylinder liner (11). The test bench (14) is provided with a valve lift adjustment mechanism (12). The valve lift adjustment mechanism (12) is provided with a push rod (18). The push rod (18) is provided with a displacement sensor (7). The push rod (18) is driven by a stepper motor (13).

2. The engine intake manifold flow test bench according to claim 1, characterized in that: The displacement sensor (7), momentum meter (10), air intake flow meter (15) and air intake flow differential pressure sensor (16) are electrically connected to the corresponding data acquisition device (5), and each data acquisition device (5) is electrically connected to the computer (4) through a data transmission line. The computer (4) is electrically connected to the frequency converter (1) through a data transmission line.

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