Patent ID: 8880321
Filing Date: 2014-11-04
Classification: F02D,G05B

Abstract:
1. A method of estimating an air charge for an engine, the method comprising: providing an air model for the engine, the air model including both a throttle model and a cylinder flow model, the cylinder flow model being a linear programming support vector regression (LP-SVR) model including a plurality of support vectors having associated weighting parameters; transforming the air model to a linear parametric air model to allow online support vector regression learning; determining the support vectors and the weighting parameters for the LP-SVR model using steady-state engine operation data; adjusting the weighting parameters, while online, using a set of transient driving cycle data; and estimating the air charge during engine operation using the air model, wherein the linear parametric air model is established without using signal derivatives and expressed as: V R=air specific gas constant; T τ=filter time constant; s=Laplace transform parameter; L=Laplace transform; Λ P W α Ne=engine speed; P V T K=SVR Kernel function; VVT=variable valve timing; and SV