Control System for a Hybrid Electric Vehicle to Anticipate the Need for a Mode Change

摘要

A parallel hybrid electric vehicle method and system including an internal combustion engine (ICE), an electric traction motor/generator, and a controller. A control strategy is provided to prevent unpredicted or undesired engine starts by anticipating the need for the vehicle engine, while avoiding "false starting" the engine or allowing an annoying lag in performance that will occur if the engine is not started in advance of an actual requirement. The invention anticipates the need for engine starts and electromotive driving by monitoring vehicle speed and driver commands and their rates of change. The invention allows consistent performance and establishes seamless transitions between engine driving and electromotive driving.