Method and apparatus for selecting a combustion mode for an internal combustion engine

摘要

A method for selecting a preferred combustion mode for an internal combustion engine operative in a plurality of combustion modes is described. The method includes selecting a combustion mode in terms of first and second engine parameters, and separating the engine operating region into zones defined by the first parameter. Each of the zones is further separated into sub-zones defined by the second parameter. A combustion mode is associated with each of the sub-zones. Operating states are determined for the first and second parameters. One of the zones is identified based upon the state for the first parameter. One of the sub-zones of the identified zone is identified based upon the state for the second parameter, along with a combustion mode associated with the identified sub-zone. The engine is controlled to the preferred combustion mode, depending upon hysteresis.

主权项

1. Method for selecting a preferred combustion mode for an internal combustion engine selectively operative in a plurality of combustion modes, comprising:
defining engine operation in terms of first and second parameters; separating the engine operation into a plurality of zones, each zone having boundaries defined by thresholds for the first parameter; separating each of the zones into a plurality of sub-zones, each sub-zone having boundaries defined by thresholds for the second parameter; associating one of the combustion modes with each of the sub-zones, wherein said combustion modes comprising a single injection auto-ignition mode, a double injection auto-ignition mode, a spray-guided spark-ignition mode, and a homogeneous-charge spark-ignition mode; determining states for the first and second parameters; identifying one of the zones based upon the state for the first parameter; identifying one of the sub-zones of the identified zone based upon the state for the second parameter; and, identifying a preferred combustion mode comprising the combustion mode associated with the identified sub-zone.