Electronic control device for internal combustion engine

An electronic control device for an internal combustion engine, comprising:

• rotational speed detecting means for detecting the rotational speed of said internal combustion engine;
• intake air amount detecting means for detecting the intake air flow rate of said internal combustion engine;
• throttle travel detecting means for detecting the throttle travel of said internal combustion engine;
• intake manifold pressure detecting means for detecting the intake manifold pressure of said internal combustion engine;
• storing means in which the charging efficiency corresponding to the rotational speed and the throttle travel in the standard atmospheric condition is previously stored and set as a two-dimensional map, and which outputs said stored and set value corresponding to said rotational speed and said throttle travel;
• and
• correcting means for correcting the atmospheric pressure relational value including the atmospheric pressure calculated based on the information of the intake air amount, rotational speed, charging efficiency, and throttle travel of said internal combustion engine by using the atmospheric pressure relational value including the atmospheric pressure calculated based on the information of the rotational speed, throttle travel, and intake manifold pressure of said internal combustion engine.