초록 ▼

A method (100) and system for actively controlling the temperature of engine (10) exhaust gas entering an aftertreatment device and thereby controlling undesirable emissions. Through control of the turbine blade position of a variable geometry turbocharger (16), the temperature of the exhaust gas en

A method (100) and system for actively controlling the temperature of engine (10) exhaust gas entering an aftertreatment device and thereby controlling undesirable emissions. Through control of the turbine blade position of a variable geometry turbocharger (16), the temperature of the exhaust gas entering the aftertreatment device is maintained within the operating temperature window for the device, and at the same time, achieves the fuel economy benefits associated with turbocharging.

대표청구항 ▼

[ What is claimed is:] [1.]1. An internal combustion engine having an exhaust into an aftertreatment system comprising:an intake manifold path;a compressor in said intake manifold path;an exhaust manifold path;a turbine in said exhaust manifold path, said turbine having inlet vanes variable between

[ What is claimed is:] [1.]1. An internal combustion engine having an exhaust into an aftertreatment system comprising:an intake manifold path;a compressor in said intake manifold path;an exhaust manifold path;a turbine in said exhaust manifold path, said turbine having inlet vanes variable between an open position and a closed position for controlling the temperature of an exhaust gas exiting said turbine and entering the aftertreatment system;wherein during periods of stratified combustion in said internal combustion engine, changes in said inlet vane positions does not affect engine torque; andwherein during periods of homogeneous lean burn in said internal combustion engine, changes in engine operating conditions due to changes in said inlet vane positions are counteracted by altering other engine variables to maintain desired engine operating conditions independent of said inlet vane positions.