In an electronically controlled fuel injection apparatus of a speed density type, a new air intake efficiency correction value for correcting an intake pressure is calculated based on the intake pressure, an engine rotation speed, and an advance angle amou...

A shutdown method for an internal combustion engine containing deactivatable intake and exhaust valves is disclosed in which unburned fuel existing within the engine at the time of shutdown is managed to prevent its release into the atmosphere.

The method involves using an induction pipe pressure model in which the relationship between the cylinder filling and the pressure in the induction pipe is described by a straight line with a gradient (k) and an offset (p0). The gradient and the offset are...