Jeffrey L Campbell

Title: Innovations by Jeffrey L Campbell

Introduction

Jeffrey L Campbell is a notable inventor based in Hope, Indiana, recognized for his contributions to fuel injection technology. With a total of four patents to his name, Campbell has made significant advancements in the design and functionality of fuel injectors, enhancing their efficiency and reliability.

Latest Patents

One of Campbell's latest patents is for a unit injector with a hard stop timing plunger. This innovative design features an injector body that includes a barrel, spring housing, and nozzle, which contains a central bore for a variable length plunger assembly. The assembly is designed to provide controlled variation in injection timing, ensuring precise fuel metering and expulsion. The timing plunger is equipped with a radial flange that engages a stop in the injector barrel, maintaining its position during the metering process and making the injector timing insensitive to pressure variations. Additionally, the injector may include a damping chamber to prevent damaging contact between the timing plunger and the injector barrel.

Another significant patent by Campbell is for a low inertia, wear-resistant valve for engine fuel injection systems. This assembly utilizes advanced structural ceramics, such as silicon nitride, for the needle and spring retainer subassembly. The combination of metal and ceramic in the valve seat subassembly allows for maximum control over the injection event, enabling quicker termination of fuel injection and improved management of exhaust emissions.

Career Highlights

Throughout his career, Campbell has worked with prominent companies such as Cummins Engine Company, Inc. and Toshiba Corporation. His experience in these organizations has contributed to his expertise in fuel injection systems and has facilitated his innovative work in the field.

Collaborations

Campbell has collaborated with notable colleagues, including Lester L Peters and Joseph C Bentz. Their combined efforts have likely fostered an environment of innovation and creativity, leading to advancements in fuel injection technology.

Conclusion

Jeffrey L Campbell's contributions to the field of fuel injection technology through his patents demonstrate his commitment to innovation and improvement. His work continues to influence the efficiency and effectiveness of fuel injectors in modern engines.