Zf Friedrichshafen Ag

Jens Kastens

Frank Deprez

Holger Bacher

A method for operating a hybrid vehicle having a prime mover including an internal combustion engine and an electric machine, the vehicle further having a transmission connected between the prime mover and a driven end and including multiple shift elements, the vehicle further having a separating clutch connected between the internal combustion engine and the electric machine, and a starting component which is provided by a separate launch clutch or by a shift element of the transmission. The method includes monitoring a rotational speed of one of the internal combustion engine, the electric machine, the transmission, or the driven end during travel with the internal combustion engine running and the separating clutch engaged. The method further includes determining an increase in driving resistance, and decoupling the internal combustion engine when the monitored rotational speed falls below or reaches a first limiting value by disengaging the separating clutch.

Control method and control unit for a hybrid vehicle

A method for operating a drive train of a motor vehicle with a prime mover () including an internal combustion engine () and an electric machine (), a separating clutch () connected between the internal combustion engine and the electric machine, and a transmission () connected between the prime mover () and a driven end () is provided. When at least one first operating condition is present, a previously decoupled internal combustion engine () is coupled such that the separating clutch () is actuated to engage. When at least one second operating condition is present, the coupling of the internal combustion engine is aborted, and an absolute value of a torque currently transmitted or currently transmittable by the separating clutch () is determined. The separating clutch () is disengaged at different rates depending on the absolute value of the torque currently transmitted or currently transmittable by the separating clutch ().

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Tettnang, Germany

Jens Kastens