| 摘要 |
A system for controlling an internal combustion engine in a fuel-efficient manner includes a control computer operable to determine a number of engine load/engine speed boundary conditions in relation to an engine output characteristics map and define therefrom an undesirable engine operation region U. As long as the engine is engaged with at least one of the gear ratios of the vehicle transmission, the control computer is operable in one embodiment to maintain engine operation outside of the region U, and in an alternate embodiment to allow operation within the region U but with decreased engine performance/response to thereby encourage operation outside of the region U. The system of the present invention further includes the ability to override, e.g. disable, such engine control based on, for example, certain transmission autoshifting conditions, current vehicle position, and/or information provided from a remote source via a signal transceiver. Using the engine control strategies of the present invention, fuel efficient operation can be optimized, particularly when upshifting through the various transmission gears.
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