| 摘要 |
A gas additive and a liquid additive are supplied efficiently. There are provided a liquid supply device (5) that stores a liquid additive and supplies the liquid additive into an exhaust passage (2) of an internal combustion engine, a gas supply device (6) that stores a gas additive and supplies the gas additive into the exhaust passage (2), a catalyst (3) that is arranged in the exhaust passage (2) at a downstream side of locations at which the additives are supplied from the liquid supply device (5) and the gas supply device (6), respectively, with the additives reacting in the catalyst, and an adjustment device (10) that adjusts an amount of the liquid additive to be added from the liquid supply device (5) and an amount of the gas additive to be added by the gas supply device (6) in accordance with a rule defined beforehand. |
