Method and apparatus to produce a smooth input speed profile in mode for a hybrid powertrain system

摘要

A method for controlling a powertrain including an electro-mechanical transmission (10) coupled to an engine (14) and an electric machine (56,72) includes monitoring a desired input speed; signal processing the desired input speed to create a lead control signal to control the engine (14), wherein the signal processing includes low pass filtering the desired input speed and applying system constraint limits upon the desired input speed; signal processing the desired input speed to create an immediate control signal to control the electric machine (56,72), wherein the signal processing includes delaying the desired input speed by a lead period, low pass filtering the desired input speed, and applying system constraint limits upon the desired input speed; and controlling the powertrain through a powertrain transition based upon the lead control signal and said immediate control signal.