Patent ID: 6356831
Filing Date: 2002-03-12
Classification: B60W,F02D,F16H,Y02T

Abstract:
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 associated with a manual transmission, 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; (b) storing said lowest cost value in said shift schedule and combustion mode schedule; (c) determining the current transmission gear, vehicle speed, and wheel torque; (d) generating an optimum transmission gear value as a function of said lowest cost value; (e) illuminating a first shift indicator light when said current transmission gear is less than said optimum transmission gear; and (f) illuminating a second shift indicator light when said current transmission gear is greater than said optimum transmission gear.