Patent ID: 7209824

Claim:
A regulated internal combustion engine, comprising: a cylinder having a piston and a combustion chamber; an intake manifold having an entrance and an exit; a throttle valve attached to the intake manifold entrance; an intake valve connecting the intake manifold exit to the combustion chamber; an exhaust pipe attached to the combustion chamber by an exhaust valve; an intake manifold pressure sensor; an engine regulator that: determines a plurality of engine parameters, calculates a theoretically expected intake manifold pressure based on the engine parameters, measures an intake manifold pressure, compares the calculated intake manifold pressure to the measured intake manifold pressure, adjusts a plurality of engine adaptation parameters to reduce the difference between the calculated and measured intake manifold pressure values and to maintain a predetermined air/fuel ratio, compares a deviation of the adaptation values from respective neutral values of the engine parameters with predetermined threshold values, and adjusts the adaptation parameters based upon an absorption characteristic curve of the internal combustion engine when the deviation of the adaptation values exceeds the threshold values.