Use method of series pressure regulating valves of test bed air intake system

Abstract

The invention discloses a use method of series pressure regulating valves of a test bed air intake system. The use method comprises the following steps that firstly appropriate opening of a secondary pressure regulating valve and upstream pressure of the secondary pressure regulating valve are determined in turn according to mass flow rate and / or volume flow rate through the series air intake pressure regulating valves of the test bed air intake system, downstream pressure of the secondary pressure regulating valve and upstream pressure of a primary pressure regulating valve; and then the primary pressure regulating valve and the secondary pressure regulating valve are controlled through a control system according to control quantity of parameters obtained according to a prediction control method. Compared with methods in the prior art, the overall performance of a test bed can be mastered, test cost can be reduced and test efficiency can be enhanced by the use method of the series pressure regulating valves of the test bed air intake system.

Description

technical field [0001] The invention relates to a method for using a pressure regulating valve connected in series in an air intake system of a test bench. Background technique [0002] At present, during the engine test, a set of intake air parameters at the state point are required, including intake air total pressure, intake air flow rate, intake air oxygen composition, intake air total temperature, and engine fuel supply volume, and at the same time reach the set value and stabilize After that, record its performance and parameters or assess its performance. At present, the air intake parameters are usually adjusted to reach the set value by adjusting related valves. When the pressure difference between the intake source pressure and the intake analog pressure is too high, it is necessary to use a series pressure regulating valve to achieve pressure adjustment of the intake system. , but there is no mature method of using the pressure regulating valve in series in the a...

AI Technical Summary

Problems solved by technology

At present, the air intake parameters are usually adjusted to reach the set value by adjusting related valves. When the pressure difference between the intake source pressure and the intake analog pressure is too high, it is necessary to use a series pressure regulating valve to achieve pressure adjustment of the intake system. , but there is no mature method of using the pressure regulating valve in series in the air intake system of the test bench, which increases the simulation time and increases the test cost

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