Patent ID: 7328673
Filing Date: 2008-02-12
Classification: F02D,Y02T

Abstract:
1. A valve timing correction control apparatus for an internal combustion engine having a plurality of banks and variable valve operating mechanisms disposed at the respective banks for variably controlling valve timings of intake valves separately at the respective banks, the valve timing correction control apparatus comprising: air/fuel ratio sensors provided to exhaust systems of the respective banks; and a control unit configured to correct the valve timings of the intake valves at the respective banks in accordance with deviations of air/fuel ratios detected by the respective air/fuel ratio sensors, wherein the control unit is programmed to perform correction of the valve timings when operation angles of the intake valves are controlled so as to be small, wherein the control unit is programmed to obtain base air/fuel ratios for the respective banks when the operation angles of the intake valves are controlled so as to be large and perform correction of the valve timings so as to allow the air/fuel ratios for the respective banks to become equal to the base air/fuel ratios, and wherein the control unit is programmed to perform retard correction of an intake valve closing timing when the air/fuel ratio is richer than the base air/fuel ratio and perform advance correction of the intake valve closing timing when the air/fuel ratio is leaner than the base air/fuel ratio.