Patent ID: 6024075
Filing Date: 2000-02-15
Classification: F02D,F02M,Y02T

Abstract:
An engine control for an automotive engine having an inlet system and an exhaust system, with said engine control comprising:a plurality of sensors for measuring engine operating parameters;an EGR valve for permitting exhaust gas to flow from the exhaust system to the inlet system of the engine; andan engine controller, operatively connected with said sensors, for operating the EGR valve by opening the EGR valve during a plurality of test periods separated by non-uniform intervals and by measuring the engine speed response to the opening of the EGR valve during predetermined periods corresponding to the timing of the test periods, with the controller increasing the intensity of the test periods in the event that the engine's speed response falls below a predetermined threshold and decreasing the length of the test periods in the event that the engine's speed response is greater than a predetermined threshold.