Method for tire pressure warning

Claim 1

Method for providing a tire pressure warning in a motor vehicle, comprising the steps of: first, determining a wheel speed scaling factor for each respective wheel that is to be monitored in terms of tire pressure, based on respective wheel speeds measured during a wheel speed balance in which the motor vehicle travels without braking above a minimum speed with a degree of cornering below a predetermined limit value for cornering and a driving torque below a predetermined limit value for driving torque; second, combining the wheels, to be monitored in terms of tire pressure, in pairs and calculating a difference of the associated wheel speed scaling factors for each pair of wheels; third, comparing said wheel speed scaling factors and determining a greatest difference of the wheel speed scaling factors between the pairs of wheels; fourth, comparing said greatest difference with a predetermined threshold value; d.1) repeating steps a) to d) if a predetermined number of cycles has not yet been reached, and otherwise d.2) output a warning signal to display an excessive tire pressure deviation. fifth, if said greatest differences exceeds the predetermined threshold value, determining whether said greatest difference has exceeded the predetermined threshold value in a predetermined number of prior iterations of said first through fourth steps; sixth, if said greatest difference has exceeded the predetermined threshold in a predetermined number of said prior iterations, outputting a warning signal to display an excessive tire pressure deviation; and seventh, if said greatest difference has not exceeded the predetermined threshold in a predetermined number of said prior iterations, repeating said first through sixth steps.