Control apparatus and method for internal combustion engine with variable compression ratio mechanism

摘要

A control apparatus for an internal combustion engine (1) includes a variable compression ratio mechanism (100) capable of varying a compression ratio of the engine, a knock sensor (27) for detecting a knock occurrence sate, and a controller (20) for controlling the compression ratio and an ignition timing of the engine, the controller including a compression ratio setting section that sets a compression ratio to be attained by the variable compression ratio mechanism (100) in accordance with an operating condition of the engine (1), and an ignition timing learning correcting section that determines a learning correction value of an ignition timing in accordance with the knock occurrence sate, wherein the controller (20) further includes a compression ratio correcting section that corrects the compression ratio set by the compression ratio setting section in accordance with the learning correction value of the ignition timing. A control method is also provided.