Method and control device for operating a road-coupled hybrid vehicle

US9914444B2 · kind B2 · utility

Assignee

• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Michael Sailer · Wolfskofen, DE
• Christian Wimmer · Foster City, US
• Jan Felten · Neufahrn, DE
• Dirk Odenthal · Munich, DE

Key dates

• Filing date: Sep 22, 2014
• Grant date: Mar 13, 2018
• Expiry date: Sep 26, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S903/93
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method and a control device are provided for operating a road-coupled hybrid vehicle. The hybrid vehicle has an electronic control unit, a primary motor associated with a first axle, and a secondary motor associated with a second axle. By way of the electronic control unit, the primary motor and the secondary motor are basically controlled in a drive-oriented manner such that preferentially only a single-axle drive by the primary motor is provided. Beginning with the secondary motor switched off, when a traction requirement is determined, the secondary motor is switched on, regardless of whether the vehicle is traveling on a curve. Beginning with the secondary motor switched on, when a traction requirement is not present, the secondary motor is not switched off until it is determined that the vehicle is not, or is no longer, traveling on a curve. A traction requirement is preferably determined at least when an expected traction requirement in the longitudinal direction is predicted when wheel slip is recognized or when the ASC control is active. An expected traction requirement in the longitudinal direction is predicted when a requested longitudinal dynamic setpoint parameter exc…