Patent ID: 9453468
Filing Date: 2016-09-27
CPC Classification: F02B,F02D,G01F,G01P,Y02T

Claim Text:
1. A method of estimating an operating speed of a turbocharger including a compressor having an air inlet and an air outlet, the method comprising: determining a first pressure value corresponding to pressure entering the air inlet of the compressor; determining a second pressure value corresponding to pressure exiting the air outlet of the compressor; determining a flow value corresponding to a flow rate of air entering the air inlet of the compressor, and processing the flow value using a compressor pressure ratio map to generate at least one pair of turbocharger operating speed and compressor pressure ratio values; determining a current compressor pressure ratio value in response to the first and second pressure signals; estimating the operating speed of the turbocharger using the current compressor pressure ratio value and the at least one pair of the turbocharger operating speed and compressor pressure ratio values.