PARTICULATE MATTER OXIDATIVE RATE CALCULATION DEVICE, PARTICULATE MATTER ACCUMULATION AMOUNT CALCULATION DEVICE, AND EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

PPROBLEM TO BE SOLVED: To highly accurately calculate a particulate matter accumulation amount in a filter for cleaning exhaust independently of an operational area of an internal combustion engine. PSOLUTION: A map MAPc is created by using a catalyst bed temperature, which influences on activity of catalytic reaction, and an intake air volume GA as parameters, and the map MAPc is used for calculating a PM oxidative rate Vc (in S104). The intake air volume GA closely relates to an oxygen amount supplied to the exhaust cleaning filter per hour, and influences on the oxidative rate of the PM accumulated on the exhaust cleaning filter. By using the intake air volume GA as a factor for determining the oxidative rate , the PM oxidative rate Vc is highly accurately calculated. The PM oxidative rate Vc is used to execute an estimated calculation of the PM accumulation amount (in S108), so that highly accurate PM accumulation amount PMsm is calculated regardless of the operational area of the internal combustion engine. PCOPYRIGHT: (C)2006,JPO&NCIPI