Fuel injection controller for internal combustion engine, and engine including the same

Abstract

In a fuel injection controller, a first throttle opening THis defined at a specific time P. The Pis a specific time later than the peak value of an intake pipe internal pressure PB of a previous cycle. In the cycle, Pis a specific time that is set immediately before the calculation of the injection time. A second throttle opening THis defined at P. The fuel injection controller corrects a fuel injection amount based on variation in correction time taat the first throttle opening THto correction time taat the second throttle opening TH. The time Pis later than time P, which is the peak value of the intake pipe internal pressure of the previous cycle. Accordingly, the fuel injection amount correction is completely unaffected or only slightly affected by the intake pipe internal pressure, thus ensuring close-to-ideal correction.