Testing device for quickly detecting flow property parameters of air passage of internal combustion engine

Abstract

The invention relates to a device for quickly detecting flow property parameters of an air passage of a cylinder cover of an internal combustion engine, which is characterized in that a testing air passage is arranged above a cylinder sleeve, and the center of the cylinder sleeve is coaxial with the center of a momentum meter; the lower end of the momentum meter is connected with a pressure stabilizing barrel which is provided with two channels, wherein one channel is sequentially connected with an electrical ball valve, a pressure stabilizing box, a flow meter and a draught fan, and the otherchannel of the pressure stabilizing barrel is sequentially connected with a second electrical ball valve and a first air filter; the exhaust end of the testing air passage is connected with an air flow carding machine, a third electrical ball valve is arranged above the pressure stabilizing box and is communicated with the air flow carding machine through a flexible tube, and the air exhaust sideof the draught fan is connected with a second air filter; and the rotating speed of the draught fan is controlled by a frequency converter. The testing process of the whole test only needs 3-5 minutes. The invention has the characteristics of reducing the cost of the testing equipment and reducing the test noise on the basis of improving the testing precision, and can be used for instantly detecting cylinder covers of engines in production lines.

Description

technical field

[0001] The invention belongs to the measurement of performance parameters of an internal combustion engine, and in particular relates to a device for quickly detecting flow performance parameters of an air passage of a cylinder head of an internal combustion engine. technical background

[0002] Flow coefficient, swirl intensity, tumble intensity and other flow characteristic parameters are important parameters to evaluate the performance of the intake and exhaust passages of internal combustion engines. The current airway steady-state flow test process is to adjust the valve lift to provide a stable pressure difference before and after the airway, and then conduct a steady-state flow test. However, when doing the steady flow test of different valve lifts, since the change of the valve lift will lead to the change of the flow section of the air passage, the same air volume, the pressure difference between the front and rear of the air passage will change, and...

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