Patent Document ID: 6152116
Application ID: 09232296
Patent Flag: 1

Claim One:
1. A method of controlling an active state of an evaporative emissions control system in an automotive vehicle comprising: learning a volumetric efficiency of an engine associated with said evaporative emissions control system at a plurality of operating conditions; determining if said volumetric efficiency has been learned to within an acceptable tolerance at each of said plurality of operating conditions; setting each cell within a matrix to one of a first mode if said volumetric efficiency at an operating condition corresponding to the cell has not been learned to within said acceptable tolerance and a second mode if said volumetric efficiency at said operating condition has been learned to within said acceptable tolerance; determining a current operating condition of said automotive vehicle; accessing said matrix according to said current operating condition; determining if an accessed cell of said matrix is in said first mode or said second mode; disabling a purge vapor concentration learning mode and a purge vapor compensation mode of said evaporative emissions control system if said accessed cell is in said first mode; and enabling said purge vapor concentration learning mode and said purge vapor compensation mode of said evaporative emissions control system if said accessed cell is in said second mode.