A Control Method of Variable Geometry Mixed Flow Turbocharger

Abstract

The invention discloses a control method of a variable geometric mixed-flow turbocharger. The fuel amount of a diesel engine is saved, the exhaust quality is improved, and atmospheric pollution is reduced. The turbocharger applied to the diesel engine is involved, nozzle blades of the turbocharger are driven by a push rod, and the push rod is driven by a motor. The control method includes the following steps of S1, calibrating the nozzle blades so that the throat value of the turbocharger can be matched with the stroke of the push rod; and S2, performing joint debugging on the turbocharger andthe diesel engine, wherein the step of S2 includes the substeps of S2.1, selecting the exhaust pressure of the diesel engine as a control parameter of the throat value; S2.2, performing performance simulation on the turbocharger under different magnitudes of exhaust pressure, and obtaining multiple groups of exhaust pressure parameters and corresponding throat value parameters through matching; S2.3, performing data classification on the parameters obtained in the substep S2.2, and classifying the multiple exhaust pressure parameters corresponding to the same throat value into a same controlgear so as to obtain a plurality of control gears; S2.4, calibrating the gears starting from the control gear with the maximum throat area; and S2.5, sequentially calibrating the other control gears.

Description

Technical field[0001]The present invention relates to the field of turbocharger, and in particular, to a control method of a variable geometric mixed flow turbocharger.Background technique[0002]At present, traditional exhaust gas turbocharger has poor low-speed torque characteristics, response delay, large engine noise, slow start and low speed exhaust, etc., and cannot meet market demand. On the basis of the traditional turbocharger, it is designed with electronically controlled technology to make a variable geometric turbocharger that increases the low speed torque of high-power diesel engine. Reduce fuel consumption, improve exhaust quality, is the most advanced turbocharger product in the world.[0003]Turbocharger with electronically controlled adjustable nozzle technology, can greatly improve the diesel fuel combustion process without reducing diesel power, improve diesel engine energy saving, environmental protection, so that the diesel engine is underout It is possible to solv...

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional exhaust gas turbocharger has technical problems such as poor low-speed torque characteristics, delayed response, loud engine noise, slow starting response and difficulty in low-speed smoke exhaust, which cannot meet market demand.

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