Due to the rising need for improved learning aids, as a result of the challenges of inadequate facilities for teaching, studies must forge on to explore and develop means in which engineering education can be delivered efficiently. As a part of the world energy system, fossil fu els play a huge role and will continue to for the foreseeable future, and as a result, the study of internal combustion engines (ICEs) is highly imperative in the field of mechanical engineering. This work develops a fuel injector training kit that demonst rates the injection of fuel into the combustion chamber according to a firing order, and it will be used to enhance the study of ICEs in the Afe Babalola University Ado -Ekiti (ABUAD) Department of Mechanical and Mechatronics Engineering. This kit is desig ned using Autodesk Solid works and a stainless steel fuel rail was chosen due to its high resistance to chemical corrosion. An Arduino Uno Microcontroller was connected to a flow meter to monitor the flow rate of the developed fuel injector training kit. A volume of 2L of fuel was made available for this experiment; a volume of 0.4316L was injected across 10 experiments carried out with increasing spit time. From the experiment, the corresponding flow rates were derived , which was used in calculating the v olume injected. This work has been able to lay a foundation for studies on fuel injection using an electronic control unit module. It has also laid a foundation for research work by developing a fuel injector training kit for demonstration and experimenta l purposes. vii TABLE OF CONTENTS DECLARATION ................................ ................................ ................................ .......................... ii CERTIFICATION ................................ ................................ ................................ ....................... iii DEDICATION ................................ ................................ ................................ ............................. iv ACKNOWLEDGEMENTS ................................ ................................ ................................ .......... v ABSTRACT ................................ ................................ ................................ ................................ . vi LIST OF TABLES ................................ ................................ ................................ ......................... x LIST OF FIGURES ................................ ................................ ................................ ..................... xi CHAPTER ONE ................................ ................................ ................................ ............................ 1 INTRODUCTION ................................ ................................ ................................ ......................... 1 1.1 Backg round to the Study ................................ ................................ ................................ .... 1 1.2 Statement of the Problem ................................ ................................ ................................ .... 3 1.3 Aim and Objectives of the Study ................................ ................................ ........................ 4 1.4 Justification of the Study ................................ ................................ ................................ .... 4 1.5 Scope of the Study ................................ ................................ ................................ ................ 4 CHAPTER TWO ................................ ................................ ................................ ........................... 5 LITERATURE REVIEW ................................ ................................ ................................ ............. 5 2.1 Basic Fuel Injection System ................................ ................................ ................................ 6 2.1.1 Low -pressure side components ................................ ................................ ...................... 6 2.1.2 High -pressure side components ................................ ................................ ...................... 7 2.2 Fuel Injection Parameters ................................ ................................ ................................ ... 8 2.2.1 Start of injection and delivery ................................ ................................ ........................ 8 2.2.2 Injected fuel quantity ................................ ................................ ................................ ...... 9 viii 2.2.3 Injection duration ................................ ................................ ................................ .......... 10 2.2.4 Rate of discharge curve ................................ ................................ ................................ 10 2.2.5 Injection pressure ................................ ................................ ................................ .......... 11 2.3 Classification of Fuel In jection Systems ................................ ................................ .......... 11 2.4 Challenges of Fuel Injectors and Injection Systems ................................ ....................... 12 2.5 Development of Fuel Injection Systems ................................ ................................ ........... 13 2.5.1 Position type Control ................................ ................................ ................................ .... 14 2.5.2 Time control ................................ ................................ ................................ ................. 14 2.5.3 Pressure -time control ................................ ................................ ................................ .... 14 2.6 Safety Measures in Fuel Injection Systems ................................ ................................ ..... 16 2.7 Review of Previous Studies on Fuel Injection Systems ................................ .................. 16 CHAPTER THREE ................................ ................................ ................................ ..................... 18 MATERIALS AND METHODS ................................ ................................ ................................ 18 3.1 Materials ................................ ................................ ................................ ............................. 18 3.1.1 Filter ................................ ................................ ................................ .............................. 19 3.1.2 Fuel injector rail ................................ ................................ ................................ ............ 19 3.1.3 Flow meter ................................ ................................ ................................ .................... 20 3.1.4 Arduino uno microcontroller ................................ ................................ ........................ 21 3.1.5 Low -pressure pump ................................ ................................ ................................ ...... 21 3.1.6 Polyactic plastic ................................ ................................ ................................ ............ 21 3.1.7 Fuel supply ................................ ................................ ................................ ................... 23 3.1.8 Power supply ................................ ................................ ................................ ................ 26 3.1.9 Acrylic plastic ................................ ................................ ................................ ............... 26 3.1.10 Mild steel ................................ ................................ ................................ .................... 26 3.2 Methods ................................ ................................ ................................ .............................. 26 ix 3.2.1 Construction of the frame and cover unit ................................ ................................ ..... 27 3.2.2 3D printing of the spit chambers and the 4 -to-1 junction ................................ ............. 27 3.2.3 Connection of the injector electronic control unit circuit ................................ ............. 28 3.2.4 Parts Assembly ................................ ................................ ................................ ............. 28 3.3 Performance Evaluation of the Developed Fuel Injector Kit ................................ ........ 28 3.4 Leaks and Integrity Testing ................................ ................................ .............................. 31 3.5 Determination of System Flow Rate ................................ ................................ ................ 31 3.7 Bill of Engineering Measurements and Evaluation (BEME) for Fuel Injector Training Kit ................................ ................................ ................................ .............................. 32 CHAPTER FOUR ................................ ................................ ................................ ....................... 34 RESULTS AND DISCUSSION ................................ ................................ ................................ .. 34 4.1 Results ................................ ................................ ................................ ................................ . 34 4.2 Discussion of Results ................................ ................................ ................................ ......... 34 CHAPTER FIVE ................................ ................................ ................................ ......................... 36 CONCLUSION AND RECOMMENDATIONS ................................ ................................ ....... 36 5.1 Conclusion ................................ ................................ ................................ .......................... 36 5.2 Recommendations ................................ ................................ ................................ .............. 36 5.3 Contribution to Knowledge ................................ ................................ .............................. 37