Patent ID: 7568339
Filing Date: 2009-08-04
Classification: F02B,F02C,F02D,F04D,F05D,Y02T

Abstract:
1. A method comprising: providing a variable geometry compressor and an internal combustion engine wherein the variable geometry compressor comprises a plurality of vanes to vary geometry of a diffuser section of the compressor; operating the engine according to a series of operating condition; for each operating condition, determining a position for the vanes to optimize compressor efficiency; providing a non-linear model for position of the vanes based on one or more engine operating parameters wherein the non-linear model comprises one or more coefficients; performing a statistical analysis to fit the non-linear model using the determined positions of the vanes and the series of operating conditions to thereby determine values for the one or more coefficients; and programming a controller with control logic, the control logic stored in one or more computer-readable storage media, the controller thereby configured to control a variable geometry compressor based on the fit non-linear model and engine operating information wherein the engine operating information comprises engine throttle position and engine rotational speed.