| 摘要 |
Provided is an internal combustion engine provided with: a post-treatment device that treats an exhaust gas; and a variable valve mechanism that can freely vary valve opening timing of an exhaust valve, and a control method for the internal combustion engine. The internal combustion engine is provided with: a unit configured to raise a temperature of a part or all of the post-treatment device 20 to not less than a preset temperature by an variable valve timing mechanism 11 opening an exhaust valve 6a that is opened in an exhaust stroke at the time of normal combustion within a range of an afterburning period AB, and by the variable valve timing mechanism 11 feeding to the post-treatment device 20 an exhaust gas Ga whose temperature and pressure have become high by means of combustion of fuel injected into a cylinder 1, when an exhaust gas Ga is treated by a post-treatment device 20, or when the post-treatment device 20 is regenerated; and after that, a unit configured to add an unburned fuel component to the exhaust gas Ga by at least either an additional injection of an injector 5 in the cylinder 1 or an injection of an HC addition nozzle 31 provided at an exhaust port 8a in accordance with valve opening timing of the exhaust valve 6a by the unit configured to perform temperature rise. |
