Location History:
- Naperville, IL (US) (2004)
- Plainfield, IL (US) (2006 - 2007)
Company Filing History:
Years Active: 2004-2007
Title: Innovations by James S. Pietraski
Introduction
James S. Pietraski is a notable inventor based in Plainfield, IL (US). He has made significant contributions to the field of engineering, particularly in the development of pressure sensor technologies for automotive applications. With a total of 3 patents, his work has advanced the understanding and measurement of engine conditions.
Latest Patents
Pietraski's latest patents include a "Pressure sensor apparatus for measuring pressures including knock conditions in engine cylinders." This innovative sensor apparatus is designed for a multi-layer steel (MLS) cylinder head gasket, which measures combustion pressures to detect engine conditions. The apparatus features a membrane positioned at one end of an elongated metal tube, engaging the cylinder bore boundary. A fiber optical sensor is fixed within the tube, allowing it to communicate with cyclic combustion events via the membrane. The design includes optical wires from sensors situated at each engine bore, bundled into a common groove machined into an extended spacer layer. This tube protects the sensor apparatus from damage due to sealing stress on the gasket, particularly at the bore perimeter.
Another significant patent is the "Multi-layer steel cylinder head gasket with integrated pressure sensor." This gasket contains fully integrated pressure sensors, consisting of first and second metal layers with inner facing surfaces, and a spacer layer interposed between them. The outer surfaces of the metal layers include an elastomeric seal coating, while the inner surfaces feature a friction-reducing coating. The combustion apertures extend fully between the outer surfaces of the gasket, adapted to circumscribe cylinder bores of an engine. The spacer layer includes protective slots adjacent to each combustion aperture, where strain gauges measure deflection of the wall due to pressure changes within the combustion chambers.
Career Highlights
James S. Pietraski is currently employed at Dana Corporation, where he continues to innovate and develop advanced technologies for the automotive industry. His work has been instrumental in enhancing engine performance and reliability through improved pressure measurement techniques.
Collaborations
Pietraski has collaborated with notable colleagues, including Frank Walter Popielas and Jeffery A. Foster, contributing to the advancement of engineering solutions in their field.
Conclusion
James S. Pietraski's contributions to pressure sensor technology have significantly impacted the automotive industry. His innovative patents reflect a commitment to improving engine performance and reliability.