| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To accurately correct volumetric efficiency of an engine according to change of exhaust gas pressure. <P>SOLUTION: This device is provided with an exhaust gas flow rate calculation means 32 calculating exhaust gas flow rate Q passing through a filter, an upstream and downstream pressure difference detection means 22 detecting upstream and downstream pressure differenceΔP of the filter, an exhaust gas pressure index calculation means 34 calculating an exhaust gas pressure index SootDP based on the exhaust gas flow rate Q and the upstream and downstream pressure differenceΔP, a correction coefficient calculation means 37 calculating correction coefficient k based on the exhaust gas flow rate Q and the exhaust gas pressure index SootDP, a volumetric efficiency calculation means 36 calculating volumetric efficiencyηof an internal combustion engine, and a corrected volumetric efficiency calculation means 37 calculating corrected volumetric efficiencyηbased on the correction coefficient k and the volumetric efficiencyη. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
