Patent ID: 7191764

Claim:
A control unit for an internal combustion engine that: detects, using a sensor that is located on a downstream side of a throttle valve on an air intake passage of an internal combustion engine, a quantity of air that is taken into the internal combustion engine; and outputs a signal to an injector of the internal combustion engine such that fuel is injected in accordance with the quantity of air, wherein a timing of a rise of an air intake in which the quantity of air increases as an intake stroke of the internal combustion engine progresses and a timing of a fall of an air intake in which the quantity of air decreases as the intake strokes progresses are determined from the quantity of air and the increases and decrease thereof, and a fuel injection quantity is calculated by multiplying a predetermined constant by a quantity of air that is taken in during a period from the timing of the air intake rise until the timing of the air intake fall.