Date of Award

2018

Document Type

Campus Access Master's Thesis

Degree Name

Master of Science in Mechanical Engineering (MS)

Administrative Home Department

Department of Mechanical Engineering-Engineering Mechanics

Advisor 1

Jason R. Blough

Committee Member 1

Jeffrey D. Naber

Committee Member 2

Mahdi Shahbakhti

Abstract

The automotive market is more competitive than ever and there is a need for cost-effective solutions to problems. One way to reduce cost is to reduce the number of sensors for engine diagnostics and control. The in-cylinder pressure transducer is a crucial sensor that provides important information on combustion. This sensor is too expensive and fragile for use in production.

In this study, investigations are done to estimate combustion metrics traditionally acquired from the in-cylinder pressure transducer using other sensors namely accelerometers and the exhaust pressure sensor. Attempts are made to reconstruct the in-cylinder pressure signal using the accelerometer signals. Correlation studies are carried out between the in-cylinder pressure signal characteristics such as peaks and the location of peaks and the exhaust pressure signal peaks/troughs and their locations.

The exhaust pressure sensor shows promising results for misfire and partial burn detection at low load engine running conditions.

Available for download on Tuesday, April 14, 2020

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