| 摘要 |
<p><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 performing supercharging or braking regeneration; a control part 4 for controlling the electric turbocharger 3; and a storage part 6 for storing a relation among an engine speed, a fuel flow rate, and a target value of an air-fuel ratio of exhaust gas as a first map, and storing a relation among the engine speed, a fuel injection amount, boost pressure, an intake air amount, a water temperature, an outside air temperature, an oil temperature, a fuel injection timing, and an estimation value of the air-fuel ratio of exhaust gas as a second map. The control part 4 reads the target value of the air-fuel ratio from the first map and reads the estimation value of the air-fuel ratio from the second map, increases the boost pressure by driving the electric turbocharger 3 when the estimated value is lower than the target value, and lowers the boost pressure by making the electric turbocharger 3 to perform braking regeneration when the estimated value is higher than the target value. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
