| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a supercharge control device capable of improving engine performance. <P>SOLUTION: The supercharge control device includes: an electric turbocharger 3 provided to the engine 1 and capable of performing supercharging or braking regeneration; a control part 4 for controlling the electric turbocharger 3; a storage part 6 for storing the relation among an engine speed, a fuel flow rate, and an air-fuel ratio of exhaust gas as a map; and a λ sensor 5 for detecting the air-fuel ratio of exhaust gas. The control part 4 reads the air-fuel ratio from the map in the storage 6, the air-fuel ratio is set as a target air-fuel ratio, the electric turbocharger 3 is driven to increase boost pressure when the air-fuel ratio detected by the λ sensor 5 is lower than the target air-fuel ratio, and when the detected air-fuel ratio is higher than the target air-fuel ratio, the electric turbocharger 3 performs braking regeneration to lower the boost pressure. <P>COPYRIGHT: (C)2012,JPO&INPIT |
