INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING INTERNAL COMBUSTION ENGINE

摘要

An internal combustion engine includes an internal combustion engine main body, an intake passage, an exhaust passage, a supercharger, an intake circulation passage, an exhaust circulation passage, an intake circulation valve, an exhaust circulation valve and a controller. The supercharger is provided on the intake passage and the exhaust passage. The supercharger supplies compressed intake air to the internal combustion engine main body. The intake circulation passage connects the sections of the intake passage that are upstream and downstream of the supercharger. The exhaust circulation passage connects sections of the exhaust passage that are upstream and downstream of the supercharger. The intake circulation valve is provided in the intake circulation passage. The exhaust circulation valve is provided in the exhaust circulation passage. The controller is programmed to close the exhaust circulation valve in accordance with an opening degree of the intake circulation valve.

主权项

1. An internal combustion engine comprising:
an internal combustion engine main body; an intake passage that circulates intake air that is introduced into the internal combustion engine main body; an exhaust passage that circulates exhaust that is discharged by the internal combustion engine main body; a supercharger provided in the intake passage and the exhaust passage, which compresses and supplies intake air to the internal combustion engine main body; an intake circulation passage that connects upstream and downstream side portions of the supercharger in the intake passage; an exhaust circulation passage that connects the exhaust passage and the upstream side portion of the supercharger in the intake passage; an intake circulation valve provided in the intake circulation passage; an exhaust circulation valve provided in the exhaust circulation passage; and at least one controller programmed to close the exhaust circulation valve upon determining the intake circulation valve is opened, and open the exhaust circulation valve upon determining a predetermined amount of intake air has passed a confluence portion of the intake passage, where the exhaust circulation passage merges the intake passage, after the intake circulation valve is closed.