Karl Kühner

Title: The Innovative Contributions of Karl Kühner

Introduction

Karl Kühner is a notable inventor based in Friedrichshafen, Germany. He has made significant contributions to the field of engineering, particularly in the area of friction measurement in hydraulic systems. His work is essential for improving the performance and reliability of load-shifting transmissions.

Latest Patents

Kühner holds a patent for a "Method for determining a friction value." This invention focuses on a process for determining the coefficient of friction (μ) of hydraulically activated couplings or brakes in load-shifting transmissions. The method involves driving a transmission's drive shaft with a specified torque (T) while blocking the output shaft with a closed coupling or brake during a calibration run. The activation pressure (p) of the coupling or brake is then reduced over time, and the differential rotational speed (Δn) between the input and output is recorded. By ascertaining the coefficient of friction μ, the shifting can be conducted over the lifetime of the transmission with a constant shift quality.

Career Highlights

Kühner's career is marked by his dedication to innovation in hydraulic systems. His work at ZF Friedrichshafen AG has positioned him as a key figure in the development of advanced transmission technologies. His patent reflects his commitment to enhancing the efficiency and effectiveness of hydraulic couplings and brakes.

Collaborations

Kühner has collaborated with notable colleagues such as Manfred Sieger and Andreas Schwarz. Their combined expertise has contributed to the advancement of technologies in the field of hydraulic systems.

Conclusion

Karl Kühner's innovative work in determining friction values has made a significant impact on the engineering field. His contributions continue to influence the design and functionality of hydraulic systems in modern transmissions.