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Optimization method for shifting gears in a lean capable multi-mode engine with a manual transmission
Optimization method for shifting gears in a lean capable multi-mode engine with a manual transmission
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机译：具有手动变速器的可倾斜稀薄多模式发动机中的换档优化方法
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摘要
A method of generating a shift schedule and combustion mode schedule to optimize performance characteristics of a lean capable, multiple combustion mode engine associated with a manual transmission with a time-variant after-treatment system is disclosed. The method comprises the steps of generating a lowest cost value for fuel economy and vehicle emissions as a function of an engine operating mode, wherein the engine operating mode is selected from a group consisting of a homogeneous stoichiometric mode, a homogeneous lean mode, and a stratified mode. The lowest cost value is stored in a shift schedule and combustion mode schedule along with the engine operating parameters that achieved the lowest cost value. Then, at a particular vehicle speed and wheel torque, the actual transmission gear is compared to the optimal transmission gear as determined by the shift schedule and combustion mode schedule. If the actual transmission gear is different than the optimal transmission gear, a shift indicator light is illuminated directing a vehicle operator to either shift down or shift up the transmission gear to the optimal transmission gear.
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