| 摘要 |
In a variable cylinder-operation controlled internal combustion engine in which the operation of one or more of the cylinders can be stopped, valve operation and stoppage switchover devices are provided in the cylinders, respectively, that are capable of independently switching the operation and stoppage of the engine valves in every cylinders. The operation of the valve operation and stoppage switchover device is controlled by a control unit, so that the operation and stoppage of the engine valves in all the cylinders are repeated according to previously established engine valve operation and stoppage modes when the engine is in a cylinder operation-stopped operational state. Thus, it is possible to prevent one or more of the cylinders from being brought into an incompletely warmed state for operation when the engine is restored to the all cylinder-operated state after continuation of the cylinder-stopped operation state over a long time.
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