Fuel injection flow metering systems & test strategies for the characterisation of fuel injectors for future heavy duty commercial vehicles

This study aimed to investigate and evaluate the manufacturing techniques for diesel heavy duty injector testing which are required to meet the latest emission regulations for commercial vehicles. A review of published literature identified an absence of up to date studies relating to fuel injection metering devices and test strategy for heavy duty commercial vehicle applications. The study examined the most suitable fuel mass metering device and validated a new test strategy for the characterisation of heavy duty diesel injectors at the end of manufacture and assembly. The first part of the study focused on three commercially available metering devices and the main principles they employ. An experiment was carried out to benchmark the performance of each device in the characterisation of fuel injector behaviour. The results of this experiment were then compared to determine the capabilities and suitability of each for use in a production environment. The second part considered the implications of different test strategies and how the chosen strategy could affect the performance of the injector in real world applications. The subsequent experiment was designed to explore the effect of a transient method of characterisation of injector performance against expected performance with real world conditions. Finally the study has proposed an improved method for parameterising key features of injection rate signals during injection events. This methodology was trialled and a proposal for implementation of high volume equipment was developed. The conclusions of this study have driven the selection of a metering system for use in Delphi Technologies MY2021 production equipment and confirmed the validity of a new production test strategy. The study has also evaluated a new method for characterising parameters from injection rate. Further investigation is required to develop these parameters into valuable measures of injector performance for use in production or product monitoring.

Grantor dc:publisher

Oxford Brookes University

Year dc:date

2020

Author dc:creator

• Hogg, Thomas

Contributors dc:contributor

• Samuel, Stephen
• Durodola, John

Statement dc:rights

• All rights reserved

Language dc:language

en

DOI dc:identifier

https://doi.org/10.24384/c6j7-n406

OAI identifier oai:identifier

tle:5fc44416-00c3-4b0c-81a5-c364cdf98ea3:d6bd9758-527a-46cd-bfe2-c433766e8fca:1