A test method for testing the vibration of a gasoline engine supercharger

Abstract

A kind of gasoline engine supercharger vibration test test method belongs to supercharger test technical field.Method as follows:S1: install vibration sensor on supercharger and carry out test preparation work before:S2: control execution test condition;S3: carry out test;S4: repeat S3 at least twice.The present application judges the working state and reliability of supercharger by testing the vibration condition of each key position of supercharger in the process of engine speed-up and speed-down,provides strong data for supercharger simulation design,manufacturing process,material selection,etc.,avoids the damage of supercharger due to excessive vibration,also can accumulate experience data of supercharger vibration,can quickly measure the vibration condition of supercharger,can be used for supercharger vibration capacity verification,reliability check and other aspects of verification and evaluation test.Provides effective test method for supercharger design and development,CAE simulation verification and fault troubleshooting,provides new direction for scientific research and development,has good application prospect.

Description

Technical Field

[0001] This invention relates to a test method for vibration testing of a gasoline engine turbocharger, belonging to the field of turbocharger testing technology. Background Technology

[0002] The main structure of a gasoline engine turbocharger consists of components such as a turbine, impeller, thrust bearing, floating bearing, sealing ring, volute, and pressure shell. When a gasoline engine undergoes acceleration and deceleration tests on an engine bench, the opening of the turbocharger's wastegate changes under the control of ECU data, resulting in a change in the turbocharger's speed. This change in turbocharger speed may affect the vibration acceleration level of its impeller and bearings.

[0003] If the engine operates under this condition for a long time, it may cause excessive vibration acceleration in the turbocharger intermediate body, bearings, and sealing rings, resulting in changes in the clearance of the turbocharger intermediate body and bearings, ultimately leading to turbocharger damage.

[0004] Nowadays, turbochargers are put into use immediately after production. If the above-mentioned situation causes the turbocharger to be damaged, a new turbocharger can only be replaced, which increases the user's operating costs. Summary of the Invention

[0005] To address the problems existing in the background art, the present invention provides a test method for vibration testing of a gasoline engine turbocharger.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a method for testing the vibration of a gasoline engine turbocharger, the method comprising the following steps:

[0007] S1: Install vibration sensors on the booster and perform pre-test preparations:

[0008] S2: Control the execution of test conditions;

[0009] S3: Conduct the experiment;

[0010] S4: Repeat S3 at least twice.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] This invention establishes a vibration testing method for gasoline engine turbochargers by testing the vibration of key components during engine acceleration and deceleration. By testing the vibration of these key components, the operating status and reliability of the turbocharger can be determined, providing valuable data for turbocharger simulation design, manufacturing processes, and material selection. This method prevents turbocharger damage due to excessive vibration and also accumulates empirical data on turbocharger vibration. It enables rapid measurement of turbocharger vibration and can be used for verification and evaluation of turbocharger vibration capabilities and reliability. It provides an effective testing method for turbocharger design and development, CAE simulation verification, and fault diagnosis, offering a new direction for scientific research and development and demonstrating excellent application prospects. Attached Figure Description

[0013] Figure 1 This is the experimental curve diagram of the present invention. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0015] A method for testing the vibration of a gasoline engine turbocharger, the method comprising the following steps:

[0016] S1: Secure the vibration sensor to the booster with glue and perform pre-test preparations:

[0017] The vibration sensor is installed at least in the turbocharger intermediate body, engine cylinder head, turbocharger actuator, and turbocharger housing.

[0018] When fixing the vibration sensor, try to ensure that one measurement direction of the vibration sensor is parallel to the engine crankshaft and take a picture.

[0019] S2: Control the test conditions according to Clause 6 of GB / T18297-2001;

[0020] S3: Conduct the experiment;

[0021] S301: Start the engine, check the engine idle speed stability, and after confirming that there are no abnormalities in the engine status, warm up the engine. The warm-up conditions are engine speed 2500r / min and load 20%.

[0022] S302: Warm-up ends when both engine coolant and engine oil temperatures reach 90°C.

[0023] S303: Under 100% load conditions, the engine speed continuously and uniformly accelerates from 1000 r / min to the rated speed within 1 minute, and then continuously and uniformly decelerates from the rated speed to 1000 r / min within 1 minute.

[0024] S304: Record bench data and vibration data during engine operation, start second-by-second measurement, with a second-by-second measurement frequency of 1Hz;

[0025] S30401: Data Recording

[0026] Data collection records include, but are not limited to, the following parameters:

[0027] Engine speed, engine torque, coolant inlet temperature, coolant outlet temperature, coolant inlet pressure, oil temperature, oil pressure, turbine inlet temperature, turbine outlet temperature, turbine inlet pressure, turbine outlet pressure, intake manifold temperature, intake manifold pressure, air filter temperature and pressure drop, turbocharger intermediate body, engine cylinder head, turbocharger actuator, and turbocharger housing vibration acceleration, etc.

[0028] S30402: Data Analysis

[0029] Based on the second-by-second data collected during the test, the vibration test curve of the turbocharger was plotted, and the vibration trend was observed.

[0030] The graphs visually represent the acceleration trends at each vibration measurement point, allowing for a direct assessment of whether the booster meets design requirements.

[0031] S305: Adjust the engine load to 75%, 50% and 20% respectively, and repeat S303-S304.

[0032] S4: Repeat S3 at least twice.

[0033] Precautions:

[0034] a) Operate the engine strictly according to the above operating conditions;

[0035] b) During the installation of the vibration sensor, care should be taken to avoid affecting the normal operation of the engine and turbocharger; the installation of the vibration sensor must be safe and reliable to prevent the sensor from becoming loose during engine operation;

[0036] c) During the test, the second-by-second sampling test requirements must be strictly followed, and interruptions are not allowed;

[0037] d) During the test, the laboratory ventilation, cooling fan and water cooling circulation system should be turned on to help cool the engine and avoid engine damage.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the 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 the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A test method for vibration testing of a gasoline engine turbocharger, characterized in that: The method includes the following steps: S1: Install vibration sensors on the booster and perform pre-test preparations: The vibration sensor is installed at least in the turbocharger intermediate body, engine cylinder head, turbocharger actuator, and turbocharger housing; S2: Control the execution of test conditions; S3: Conduct the experiment; S3 includes the following steps: S301: Start the engine, check the engine idle speed stability, and after confirming that there are no abnormalities in the engine status, warm up the engine. S302: Warm-up ends when both engine coolant and engine oil temperatures reach 90°C. S303: Under 100% load conditions, the engine speed continuously and uniformly accelerates from 1000 r / min to the rated speed within 1 minute, and then continuously and uniformly decelerates from the rated speed to 1000 r / min within 1 minute. S304: Record bench data and vibration data during engine operation, start second-by-second measurement, with a second-by-second measurement frequency of 1Hz; S304 data recording includes the following steps: S30401: Data Recording Data collection records must include at least the following parameters: Engine speed, engine torque, coolant inlet temperature, coolant outlet temperature, coolant inlet pressure, oil temperature, oil pressure, turbine inlet temperature, turbine outlet temperature, turbine inlet pressure, turbine outlet pressure, intake manifold temperature, intake manifold pressure, air filter temperature and pressure drop, turbocharger intermediate body, engine cylinder head, turbocharger actuator, and turbocharger housing vibration acceleration. S30402: Data Analysis Based on the second-by-second data collected during the test, the vibration test curve of the turbocharger was plotted, and the vibration trend was observed. S305: Adjust the engine load to 75%, 50% and 20% respectively, and repeat S303-S304; S4: Repeat S3 at least twice.

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