Patent ID: 6792901
Filing Date: 2004-09-21
Classification: F01L,F02B,F02D,Y02T

Abstract:
A control system of an internal combustion engine, comprising:an operation angle adjustment mechanism continuously varying an operation angle of intake valves of the engine; an air-fuel ratio detector disposed in an exhaust passage of the engine, the air-fuel ratio detector configured to detect an exhaust parameter indicative of air-fuel ratio information; and a control unit coupled to the operation angle adjustment mechanism and the air-fuel ratio detector, the control unit being programmed, to feedback-control an air-fuel ratio of the engine on the basis of the exhaust parameter; to correct the operation angle on the basis of the exhaust parameter, wherein the engine comprises a plurality of cylinder trains, the air-fuel ratio detector including cylinder-train air-fuel ratio detectors that detect actual air-fuel ratios of exhaust gases of the respective cylinder trains and an aggregation air-fuel ratio detector that detects an actual air-fuel ratio of aggregated exhaust gas of exhaust gases discharged from the respective cylinder trains, the control unit executing the correction of the operation angle so that the actual air-fuel ratios of the respective cylinder trains are approximately equalized.