Control system for a hybrid electric vehicle to anticipate...

Details Control system for a hybrid electric vehicle to anticipate... Control system for a hybrid electric vehicle to anticipate...

2005-05-18

2008-08-05

Ellis, Christopher (Department: 3618)

Motor vehicles

Power

Electric

C701S022000, C477S003000

Reexamination Certificate

active

07407026

ABSTRACT:
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 by monitoring vehicle speed and driver demand and their rates of change. The invention allows consistent performance and establishes seamless transitions between engine driving and electromotive driving.

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Dan Colvin et al., SAE Technical Paper Series, 2004-01-0063, “Challenges of Engine Starts and Drivability in a Parallel Hybrid-Electric System”, Mar. 8-11, 2004, pp. 1-12.

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