Two-staged turbocharging system testing device and testing method

Abstract

The invention discloses two-staged turbocharging system testing device and testing method. The components of an analogue turbocharging system are as follows: the outlet of an air compressor for simulating exhaust flow of an engine is sequentially connected with a filtering tank, a laminar flow meter, an intake control valve, a surge tank, a heater, an intake pressure regulating valve and high- and low-pressure turbines to empty; a branch pipe of an inlet pipe of the filtering tank is provided with a vent valve; a vortex side bypass-valve is connected between the inlet and the outlet of the high-pressure turbine; the outlet of a low-pressure gas compressor is sequentially connected with an intercooler, a high-pressure gas compressor, a second intercooler, a second surge tank, a second laminar flow meter and a back pressure regulating valve and then outputs pressurized air; a pressure side bypass valve is connected between the inlet and the outlet of the high-pressure gas compressor. The gas temperature, pressure and flow are adjusted in a plurality of manners; the pre-vortex pressure and the temperature gradient are tested by transient pressure and temperature sensors; theoretical basis and data support are provided for a transient control strategy.

Description

technical field [0001] The invention relates to a test device for simulating turbocharging of an engine, especially a test device for simulating two-stage supercharging of an engine, so as to reproduce target exhaust pressure and exhaust temperature change rate. Background technique [0002] Chinese patent literature discloses a "model-based engine turbocharging control method" (CN201110457798.9, China First Automobile Co., Ltd.), which obtains the supercharging pressure and flow rate by establishing a compressor and turbine energy balance model. The relationship between the exhaust gas flow of the wastegate valve, and then use the spring connecting rod and the wastegate valve flow model to control the waste gas flow, thereby controlling the energy output of the vortex energy, and finally controlling the boost pressure. It only controls the supercharging pressure by adjusting the single parameter of the exhaust gas flow, which has the defect of a single supercharging control...

AI Technical Summary

Problems solved by technology

It only controls the supercharging pressure by adjusting the single parameter of the exhaust gas flow, which has the defect of a single supercharging control method

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