Abstract: A method is provided for encrypted radio transmission of data telegrams spaced apart in time in a sequence between a transmitter and a receiver of a system, wherein a key is changeable and is cryptologically derived from a current piece of information. The time elapsed between a preceding telegram and the encrypted telegram implementing the desired data transmission is used as the key. The time span results from a value or entry of a parameter present in the system. The duration in the transmitter and the receiver is determinable from a previously transmitted value or entry of a parameter, or derived only in the transmitter and wirelessly transmitted to the receiver for a future telegram. In a motor vehicle tire pressure monitoring system, the transmitted data originate from a tire sensor and are wirelessly transmitted in an encrypted manner to a vehicle body.

Abstract: Linear brake pedal travel measurements are provided using a diagnostic unit with at least two linear measurement devices. The at least two linear measurement devices are offset in at least a vertical direction from a face of the brake pedal lever, and therefore directly measure non-linear pedal travel values. Thus, in certain embodiments, the system is further configured to convert the non-linear pedal travel measurements received from each of the at least two linear measurement devices to a linear brake pedal travel value corresponding to an operated position of the brake pedal lever. The resulting linear brake pedal travel information may then be used to evaluate brake pedal performance or measure customer brake feeling in an objective and reproducible way.

Abstract: Linear brake pedal travel measurements are provided using a diagnostic unit with at least two linear measurement devices. The at least two linear measurement devices are offset in at least a vertical direction from a face of the brake pedal lever, and therefore directly measure non-linear pedal travel values. Thus, in certain embodiments, the system is further configured to convert the non-linear pedal travel measurements received from each of the at least two linear measurement devices to a linear brake pedal travel value corresponding to an operated position of the brake pedal lever. The resulting linear brake pedal travel information may then be used to evaluate brake pedal performance or measure customer brake feeling in an objective and reproducible way.

Abstract: A method is provided for encrypted radio transmission of data telegrams spaced apart in time in a sequence between a transmitter and a receiver of a system, wherein a key is changeable and is cryptologically derived from a current piece of information. The time elapsed between a preceding telegram and the encrypted telegram implementing the desired data transmission is used as the key. The time span results from a value or entry of a parameter present in the system. The duration in the transmitter and the receiver is determinable from a previously transmitted value or entry of a parameter, or derived only in the transmitter and wirelessly transmitted to the receiver for a future telegram. In a motor vehicle tire pressure monitoring system, the transmitted data originate from a tire sensor and are wirelessly transmitted in an encrypted manner to a vehicle body.