| 摘要 |
The invention is directed to a method and a control apparatus for operating an internal combustion engine especially of a motor vehicle. The engine has a combustion chamber (3) into which fuel is directly injected and is combusted in a homogeneous mode of operation or in a stratified-charge mode of operation. The engine includes an underpressure store (6) connected to an intake manifold (1). The underpressure store (6) makes available the auxiliary energy which is required for the servo units (8, 10, 11) of the motor vehicle. In the method and control apparatus, a throttle (19), which is provided in the intake manifold (1), is so adjusted during stratified-charge operation of the engine that the pressure in the intake manifold (1) is reduced in the event that a suppressed injection is present especially because of overrun fuel cutoff or a charge of pressure to the underpressure source (6) because of at least one servo unit (8, 10, 11) whereby the underpressure in the underpressure store is reduced.
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