| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust temperature estimation device capable of achieving a low-cost and accurate estimation of an exhaust temperature in an exhaust passage under a wide range of conditions.SOLUTION: An exhaust temperature estimation device has an oxidation catalyst (5) and a DPF (6) in an exhaust passage (4) of an internal combustion engine (1) and estimates an exhaust temperature in the exhaust passage at one side either upstream or downstream of the oxidation catalyst on the basis of a detection value of an exhaust temperature sensor (11) installed at the other side. The exhaust temperature estimation device can execute an accurate exhaust temperature estimation by using a thermal balance model taking into account an oxidation combustion heating value Qon the basis of an additive amount of hydrocarbon and a heat exchange amount Qbetween the oxidation catalyst and exhaust. |
