Patent ID: 6691024
Filing Date: 2004-02-10
Classification: F01L,F02D,Y02T

Abstract:
A method for controlling an internal combustion engine having a camshaft, a crankshaft, a camshaft sensor and a crankshaft sensor, the phase position of the camshaft being adjustable in relation to the crankshaft, the crankshaft sensor registering the crankshaft angle, and the camshaft sensor registering the camshaft angle, said method comprising:deriving a phase position from registered crankshaft and camshaft angles upon starting the internal combustion engine; determining deviation of the phase position from a predetermined phase position; if the deviation is less than a predetermined threshold, operating the internal combustion engine in a normal operation mode by calculating a correction value as a function of the deviation of the phase position from the predetermined phase position, and calculating an actual phase position as a function of the phase position, derived from the registered crankshaft and camshaft angles, and the correction value; and if the deviation is not less than the predetermined threshold, operating the internal combustion engine in an emergency running mode by equating the actual phase position to a derived phase position based on the registered crankshaft and camshaft angles; and determining at least one control signal for an actuator of the internal combustion engine as a function of the actual phase position during operation of the internal combustion engine.