Journal Article
Geometric and Topological Considerations to Maximize Remotely Mounted Cylinder Pressure Transducer Data Quality
2009-04-20
2009-01-0644
The piezoelectric cylinder pressure transducer is ubiquitous for developing and optimizing the combustion process in modern internal combustion engines. Over the past three decades, significant advances in cylinder pressure transducer technology and enormous advances in digital computing sophistication have made the acquisition and analysis of engine cylinder pressure the cornerstone diagnostic tool for today’s engine combustion community. Such improvements in the ease of acquiring cylinder pressure based metrics have, in many instances, fostered the assertion that the transducer is faithfully indicating the actual in-cylinder pressure. Careful analysis, however, can uncover anomalies in the cylinder pressure data quality resulting from thermal shock [1]. Randolph [2] laid the foundation for General Motor’s pursuit of remotely mounted piezoelectric cylinder pressure transducers, with fresh approaches to connecting passage design and the thermal protection of the transducer diaphragm.