초록 ▼

A system for estimating turbocharger compressor outlet temperature includes an engine controller responsive to any two of corrected turbocharger speed, corrected fresh mass air flow and turbocharger compressor pressure ratio (compressor outlet pressure/compressor inlet pressure) to compute compresso

A system for estimating turbocharger compressor outlet temperature includes an engine controller responsive to any two of corrected turbocharger speed, corrected fresh mass air flow and turbocharger compressor pressure ratio (compressor outlet pressure/compressor inlet pressure) to compute compressor outlet temperature based on a corresponding compressor outlet temperature model.

대표청구항 ▼

1. A system for estimating turbocharger compressor outlet temperature, comprising:a turbocharger having a compressor defining a compressor inlet and a compressor outlet fluidly coupled to an intake manifold of an internal combustion engine; a turbocharger speed sensor producing a turbocharger speed

1. A system for estimating turbocharger compressor outlet temperature, comprising:a turbocharger having a compressor defining a compressor inlet and a compressor outlet fluidly coupled to an intake manifold of an internal combustion engine; a turbocharger speed sensor producing a turbocharger speed signal indicative of turbocharger rotational speed; means for determining air pressure within said compressor outlet and producing a first pressure signal corresponding thereto; a compressor inlet pressure sensor sensing air pressure within said compressor inlet and producing a second pressure signal corresponding thereto; means for determining a mass flow of fresh air entering said compressor inlet and producing a mass air flow signal corresponding thereto; and a control circuit computing a pressure ratio as a ratio of said first and second pressure signals, said control circuit estimating a temperature of said compressor outlet as a function of any two of said turbocharger speed signal, said mass air flow signal and said pressure ratio.