| 摘要 |
A method of operating a hybrid homogenous-charge compression-ignition (HCCI) engine and spark ignition (SI) engine. The engine includes at least two cylinder groups, and each of the cylinder groups further include at least one cylinder. The method comprises the steps of detecting a transition request to transition the engine from a current operating mode to a desired operating mode. For example, a transition request from HCCI combustion mode to SI combustion mode, or vice versa. In response, the method transitions the first cylinder group from the current engine operating mode to the desired engine operating mode during a first time period, and transitions the second cylinder group from the current engine operating mode to the desired engine operating mode during a second time period. The second time period begins after the start of the first time period. In one aspect of the invention, the second time period begins after the end of the first time period, and in another aspect of the invention, the second time period overlaps the first time period.
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