Abstract: The invention relates to a method for operating a motor vehicle in order to detect an overload on a roll stabilizer which is supported so that it can rotate on a vehicle body and includes two stabilizer parts that can be rotated relative to each other by a torsional angle (?) via a rotary drive arranged between these parts. In order to detect an impairment to the driving safety of the vehicle in a timely manner, a ratio of the torsional angle (?) to a variable which is equivalent to an applied torque (M) of the rotary drive is ascertained, and an overload is determined if the ratio lies outside of a specified tolerance range.

Abstract: The invention relates to a method for operating a motor vehicle in order to detect an overload on a roll stabilizer which is supported so that it can rotate on a vehicle body and includes two stabilizer parts that can be rotated relative to each other by a torsional angle (?) via a rotary drive arranged between these parts. In order to detect an impairment to the driving safety of the vehicle in a timely manner, a ratio of the torsional angle (?) to a variable which is equivalent to an applied torque (M) of the rotary drive is ascertained, and an overload is determined if the ratio lies outside of a specified tolerance range.

Abstract: In order for the viscosity of the engine oil to be determined as directly as possible, particularly in the case of a motor vehicle with hydraulic control of the gas exchange valves, provision is made for a time period which a hydraulic component, in particular a solenoid valve, requires to move from a first position to a second position to be used as a measure of the viscosity. In particular, an electrical control signal for the solenoid valve is evaluated in the process. An additional sensor arrangement is not required. The determined viscosity is preferably actively used for controlling the gas exchange valves.