Process for operating a hybrid vehicle

US8452471B2 · kind B2 · utility

Assignee

• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Andreas Wilde · Karlstad, SE
• Torsten Herzog · Munich, DE

Key dates

• Filing date: Mar 8, 2011
• Grant date: May 28, 2013
• Expiry date: Mar 13, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/84
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A process for operating a hybrid vehicle in an internal-combustion-engine-driven mode and/or in an electric-motor-driven mode, wherein, on a route section to be traveled and considered for driving in the electric-motor-driven mode, a change to the electric-motor-driven mode will take place only when a threshold value is exceeded which represents, or correlates with the efficiency advantage achievable on the route section by a change from the internal-combustion-engine-driven mode to the electric-motor-driven mode. Starting from the instantaneous position of the hybrid vehicle, the route is examined in an anticipatory manner with respect to such a route section, wherein the threshold value is adapted when such a route section was recognized and a driving through the route section in the electric driving mode would likely lead to a lowering of the state of charge of an electric energy accumulator into a critical state of charge range.