Frank Keller

Title: Frank Keller: Innovator in Internal Combustion Engine Technology

Introduction

Frank Keller is a notable inventor based in Ostfildern, Germany. He has made significant contributions to the field of internal combustion engines, holding 2 patents that showcase his innovative approaches to fuel injection technology.

Latest Patents

Keller's latest patents include a method for operating a compression ignition internal combustion engine. This method involves injecting fuel directly into a combustion chamber as a main injection, a post-injection, and optionally a pre-injection. The design features an injection nozzle with multiple injection bores that facilitate the pre-injection and post-injection processes, which are carried out cyclically. To minimize the wetting of combustion chamber walls, the partial quantities of fuel and the lift of the nozzle needle are carefully controlled. This ensures that the reach of each fuel jet in the combustion chamber is limited, preventing it from exceeding the distance to the combustion chamber boundary.

Another patent by Keller relates to an internal combustion engine equipped with a fuel injection device. This device includes an injection nozzle that can inject fuel in the form of multiple jets for main injection, post-injection, and/or pre-injection. The nozzle is designed with at least two different rows of injection holes that can be activated separately. The control unit adjusts the operating stroke of the nozzle needle based on the piston position and the engine's operating point, allowing for different injection-hole cone angles.

Career Highlights

Throughout his career, Frank Keller has worked with prominent companies in the automotive industry, including Daimler AG and Daimler Chrysler AG. His experience in these organizations has contributed to his expertise in engine technology and innovation.

Collaborations

Keller has collaborated with notable colleagues such as Harald Braun and Alois Raab, further enhancing his work in the field of internal combustion engines.

Conclusion

Frank Keller's contributions to internal combustion engine technology through his innovative patents and collaborations highlight his role as a significant inventor in the automotive industry. His work continues to influence advancements in engine efficiency and performance.