EXHAUST GAS HEATING DEVICE FOR INTERNAL COMBUSTION ENGINE, AND METHOD FOR CONTROLLING SAME

An exhaust heating apparatus (37) according to the present invention, for heating exhaust being led to an exhaust emission purifier (30) from an internal combustion engine (10) in which a first exhaust turbocharger (28) and a second exhaust turbocharger (29) that is mainly used in a lower rotational speed range of the engine than the first turbocharger are incorporated, is arranged in a first exhaust passage (26f) that is located further upstream than a confluent portion (27c) of the first exhaust passage, which passes through an exhaust turbine (28b) of the first turbocharger and continues to the exhaust emission purifier, and a second exhaust passage (26s), which goes around the exhaust turbine of the first turbocharger and passes through an exhaust turbine (29b) of the second turbocharger and continues to the exhaust emission purifier, and further downstream than the exhaust turbine of the first turbocharger.