Intake manifold performance testing device and testing method

Abstract

The invention relates to a performance detection device and a detection method of an intake manifold. The connecting hole connected with the pipe and communicated with the hollow cavity, the control valve for opening and closing the connecting hole is arranged on the manifold connecting plate, and the air outlet pipe is fixedly arranged outside the pressure stabilizing chamber and communicated with the hollow cavity , the outlet pipe is equipped with a vortex generating device that converts the gas flowing out of the plenum chamber into a vortex, a vortex flow meter and a flow meter that detect the strength and flow of the vortex, and a gas discharge that is fixed at the free end of the outlet pipe. device. The device can be used to detect the influence of each branch of the intake manifold on the air flow of each cylinder, and realize the combination of theoretical analysis and actual test of the intake manifold, so as to have a reasonable and accurate evaluation of 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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