초록 ▼

An exhaust turbocharger for an internal combustion engine has a main compressor for compressing the fresh air supplied to the engine, an additional compressor for compressing combustion gases to be recycled to the engine, and a turbine that can be driven by the exhaust gases from the engine and whic

An exhaust turbocharger for an internal combustion engine has a main compressor for compressing the fresh air supplied to the engine, an additional compressor for compressing combustion gases to be recycled to the engine, and a turbine that can be driven by the exhaust gases from the engine and which serves to drive the main compressor and the additional compressor. The turbine has an adjustable geometry which facilitates optimization of engine operation regarding pollutant emissions, fuel consumption, and performance.

대표청구항 ▼

[What is claimed is:] [1.]a main compressor for compressing fresh air to be supplied to the engine,an additional compressor for compressing the combustion exhaust gases recycled to engine,a turbine that can be driven by the exhaust gases from the engine and which serves to drive the main compressor

[What is claimed is:] [1.]a main compressor for compressing fresh air to be supplied to the engine,an additional compressor for compressing the combustion exhaust gases recycled to engine,a turbine that can be driven by the exhaust gases from the engine and which serves to drive the main compressor and the additional compressor,an exhaust return line by which the exhaust gases to be returned to the engine are supplied to the additional compressor, anda boost air line by which the air compressed in the main compressor is supplied to the engine,wherein the turbine has a variable geometry and a first control member is located in the exhaust return line to selectively connect the exhaust return line to the intake side of the additional compressor and to the boost air line.