Method for determining a characteristic curve of a hybrid separating clutch of a hybrid vehicle without a test stand

A method for determination of a characteristic curve of a hybrid separating clutch of a hybrid vehicle without a test stand, with the hybrid separating clutch connecting or disconnecting an internal combustion engine and an electric motor, the method comprising:

• actuating the hybrid separating clutch, starting from a position assumed thereby in an unactuated state, and determining a clutch characteristic curve as a function of a clutch torque over a path of the hybrid separating clutch,
• with the internal combustion engine running and an operating state of the electric motor that brakes the internal combustion engine with the hybrid separating clutch moving, determining a clutch torque from a torque of the internal combustion engine underlying the clutch characteristic curve of the hybrid separating clutch, and
• with an opened second clutch, operating the electric motor in a direction of rotation opposite from a rotational direction of the internal combustion engine and moving the hybrid separating clutch from an opened state into a closed state, with the clutch characteristic curve of the hybrid separating clutch being determined as a function of the torque of the internal combustion engine.