METHOD OF DETERMINING EXHAUST GAS TEMPERATURE FOR AFTER-TREATMENT SYSTEM ON INTERNAL COMBUSTION ENGINE USING VARIABLE GEOMETRY TURBINE

摘要

PROBLEM TO BE SOLVED: To provide a method for controlling the variable geometry turbine of a turbocharger to increase temperature of exhaust gas delivered to an after-treatment system.

SOLUTION: In one form, the method includes steps of: reducing a fluid flow area to the turbine 12 below a normal size; and bypassing a portion of the exhaust gas around a plurality of guide vanes 10.

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