CONTROL DEVICE FOR ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a control device for an engine capable of achieving both of braking performance and accelerating performance under a situation where a master back negative pressure is insufficient.SOLUTION: A control device for an engine includes calculating means 3 for calculating a negative pressure target value Pof a throttle downstream of an intake system 20 when a master back negative pressure Pof a brake booster 43 connected to a throttle upstream in the intake system of an engine 10 is insufficient. The control device further includes supercharging pressure control means 5 for controlling a supercharging pressure which is a pressure on the throttle upstream side of the engine 10 based on the acceleration request requested in the engine 10. The control device furthermore includes throttle control means 6 for controlling a throttle opening TH so as to offset the excess or lack of the negative pressure in the throttle downstream of the intake system 20 caused by change of the supercharging pressure controlled by the supercharging pressure control means 5 while having the negative pressure target value Pas a reference based on the acceleration request requested in the engine 10.