Intake manifold performance detection device and detection method

Abstract

The invention relates to an intake manifold performance detection device and detection method. The intake manifold performance detection device comprises a pressure stabilizing cavity with the inner portion being provided with a hollow cavity and a manifold connecting plate which is fixedly arranged outside the pressure stabilizing cavity. The manifold connecting plate is provided with connecting holes which are connected with an intake manifold and are communicated with the hollow cavity. The manifold connecting plate is provided with control valves which conduct opening and closing control over the connecting holes and an air outlet pipe which is fixedly arranged outside the pressure stabilizing cavity and is communicated with the hollow cavity. A vortex generating device, a vortex momentum gage, a flow gage and a gas exhausting device are arranged inside the air outlet pipe, wherein the vortex generating device converts gas flowing out of the pressure stabilizing cavity into vortexes, the vortex momentum gage and the flow gage are used for detecting the intensity and the flow of the vortexes respectively, and the gas exhausting device is fixedly connected at the free end of the air outlet pipe. By means of the intake manifold performance detection device, the influence of various branch pipes of the intake manifold on airflow of cylinders can be detected, theoretical analysis and actual tests of the intake manifold are combined, and therefore reasonable and accurate evaluation can be achieved for the performance of the intake manifold.

Description

technical field [0001] The invention relates to a detection device, in particular to a performance detection device of an intake manifold, and also relates to a performance detection method of an intake manifold. Background technique [0002] The airflow movement in the gasoline engine cylinder has an important influence on the combustion process of the engine, especially the structure of the flow field in the cylinder at the end of the intake air, which will directly determine the turbulence intensity, airflow velocity near the spark plug at the ignition moment, and the distribution of fuel in the cylinder, thus It affects the power, economy and emission of the engine, which puts forward requirements on the performance parameters of the intake port and intake manifold. [0003] At present, there are mainly two methods for testing the performance of the air inlet, the steady state test using the air passage steady flow test bench, and the CFD digital-analog analysis. Howeve...

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Problems solved by technology

However, for the detection of the performance of the intake manifold, at this stage, CFD analysis is only carried out theoretically, and there is no method for testing and testing the intake manifold entity alone.

[0004] Theoretical CFD analysis on the performance of the intake manifold has unavoidable drawbacks because it cannot be tested whether the entity of the intake manifold is completely consistent with the digital model.

For example, when performing CFD analysis on the intake manifold, it is assumed that each branch of the intake manifold has the same effect on the gas flow of each cylinder, but the actual processed intake manifold is installed on the cylinder head for testing At this time, the influence of each branch of the intake manifold on each cylinder is inconsistent, and there is no certain rule, and when the intake manifold is installed on the cylinder head for test detection, the operation is very complicated, and it cannot be used when the detection value fluctuates greatly. Determine whether it is the problem of the intake manifold or the shape of the air passage of the cylinder head itself. This will cause great trouble to trace the problem, and also increase the difficulty in the development and testing of the intake manifold.

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