| 摘要 |
An object of this invention is, when performing a fuel-cut operation, to reduce the amount of oil consumption and also suppress electric power consumption and vibrations at cranking time, even in a state in which intake valves are stopped in a closed state. An engine 10 includes an intake variable valve mechanism 34 and an exhaust variable valve mechanism 36. An ECU 50 causes all intake valves 30 in all cylinders to stop in a closed state by means of intake variable valve mechanism 34 when performing a fuel-cut operation, including at a time when the engine is stopped. The ECU 50 also causes at least one exhaust valve 32 in all cylinders to stop in an open state by means of exhaust variable valve mechanism 36. Consequently, when executing a fuel-cut operation, needless compression can be avoided by stopping the exhaust valves 32 in an open state, while protecting a catalyst 24 from deterioration caused by contact with intake air by stopping the intake valves 30 in a closed state. Accordingly, the amount of oil consumption of the engine, and electric power consumption, vibrations and a tendency for spontaneous ignition to occur at cranking time can be improved. |
