| 摘要 |
A knocking control apparatus for a variable cylinder internal combustion engine avoids erroneous determination of knocking during a fault in a cylinder pausing mechanism to appropriately control knocking associated with the ignition timing, thereby preventing engine stall and reducing a deterioration in a catalyst. The variable cylinder internal combustion engine can be switched between a full cylinder operation mode in which all of a plurality of cylinders are operated, and a partial cylinder operation mode in which part of the plurality of cylinders is paused by a cylinder pausing mechanism. The knocking control apparatus comprises a knocking sensor for detecting knocking of the variable cylinder internal combustion engine, and an ECU for performing a knocking control to correct an ignition timing toward a retarding side when knocking is detected, determining whether or not the cylinder pausing mechanism fails, and suspending the knocking control when the fault determining means determines that the cylinder pausing mechanism is determined to fail.
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