Patent ID: 6161523
Filing Date: 2000-12-19
Classification: F02P,Y02T

Abstract:
A method for determining an ignition point in an ignition system of an internal combustion engine, the internal combustion engine including an integrated knock control arrangement, the method comprising the steps of:(a) determining a basic ignition point as a function of measured operating parameters using a stored characteristic map;(b) after an engine knock is detected, determining a knock control ignition point using the knock control arrangement, the knock control ignition point being more retarded than the basic ignition point;(c) changing the knock control ignition point in a stepped manner so as to be further advanced in response to a knock-free combustion;(d) determining a torque-optimized ignition point as a function of at least one of the operating parameters and a driver-generated demand using an integrated torque interface, the knock control ignition point being a most advanced permissible ignition point which is generated by the knock control arrangement; and(e) if the torque-optimized ignition point is more retarded than the knock control ignition point, blocking an ignition advance of the knock control ignition point after the knock-free combustion.