Access Type

Open Access Thesis

Date of Award

January 2017

Degree Type


Degree Name



Mechanical Engineering

First Advisor

Naiem A. Henein


To achieve the goals of best fuel economy, peak power and low soot emissions in military engines it is necessary to control the combustion process. An in-cylinder combustion sensor is required to achieve the goals of controlling the combustion process. Over the last four decades, in-cylinder pressure transducers and ion current sensors have been available for research and development. Most of the effort has focused on the pressure transducer, however up till now a pressure transducer suitable for use in production engines has not been developed yet, because of cost and durability concerns.This work presents the analysis of experimental data proving the relationship between the start of combustion and ionization event conducted on a military compression ignition engine equipped with hydraulic electronically controlled injection system.