CONTROL DEVICE FOR ENGINE

PROBLEM TO BE SOLVED: To improve characteristics of acceleration relative to an accelerator operation and thus easily maintain constant vehicle speed.SOLUTION: A control device (ECU 50) for an engine defines a first region R1 including an accelerator opening that allows target acceleration to become zero, a second region R2 in which an accelerator opening is larger than that in the first region R1 and a third region R3 in which an accelerator opening is smaller than that in the first region R1; defines a first acceleration characteristic map M1 applied to the first region R1 so as to have an inclination of a change of the target acceleration relative to a change of the accelerator opening, which is smaller than that of a second acceleration characteristic map M2 applied to the second region R2 and so as to have the inclination of the change of the target acceleration relative to the change of the accelerator opening, which is larger than that of a third acceleration characteristic map M3 applied to the third region R3; and controls engine torque by setting the target acceleration corresponding to the accelerator opening by using the first to third acceleration characteristic maps M1-M3.SELECTED DRAWING: Figure 4 【課題】アクセル操作に対する加速度の特性を改善し、一定車速を容易に維持できるようにする。【解決手段】エンジンの制御装置（ＥＣＵ５０）は、目標加速度を０にするアクセル開度を含む第１の領域Ｒ１と、第１の領域Ｒ１よりもアクセル開度が大きい第２の領域Ｒ２と、第１の領域Ｒ１よりもアクセル開度が小さい第３の領域Ｒ３とを規定し、第１の領域Ｒ１に適用する第１の加速度特性マップＭ１を、第２の領域Ｒ２に適用する第２の加速度特性マップＭ２よりも、アクセル開度の変化に対する目標加速度の変化の傾きが小さくなり、且つ、第３の領域Ｒ３に適用する第３の加速度特性マップＭ３よりも、アクセル開度の変化に対する目標加速度の変化の傾きが大きくなるように規定し、このような第１乃至第３の加速度特性マップＭ１〜Ｍ３を用いて、アクセル開度に応じた目標加速度を設定してエンジントルクを制御する。【選択図】図４