초록 ▼

A method of generating a shift schedule and combustion mode schedule to optimize performance characteristics of a lean capable, multiple combustion mode engine with a time-variant after-treatment system is disclosed. The method comprises the steps of generating a lowest cost value for fuel economy a

A method of generating a shift schedule and combustion mode schedule to optimize performance characteristics of a lean capable, multiple combustion mode engine 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.

대표청구항 ▼

1. A method of generating a shift schedule and combustion mode schedule for each vehicle speed and wheel torque value associated with a lean capable, multiple combustion mode engine, such that a cost value for fuel consumption and emissions characteristics is optimized, said method comprising the st

1. A method of generating a shift schedule and combustion mode schedule for each vehicle speed and wheel torque value associated with a lean capable, multiple combustion mode engine, such that a cost value for fuel consumption and emissions characteristics is optimized, said method comprising the steps of:(a) generating a lowest cost value as a function of an engine operating mode, wherein said engine operating mode is selected from a group consisting of a homogeneous stoichiometric mode, a homogeneous lean mode, and a stratified mode; and (b) storing said lowest cost value in said shift schedule and combustion mode schedule.