EXPERIMENT AND ANALYSIS OF MOTORCYCLE EXHAUST DESIGN ABDUL MUIZ BIN JAAFAR

Transcription

1 EXPERIMENT AND ANALYSIS OF MOTORCYCLE EXHAUST DESIGN ABDUL MUIZ BIN JAAFAR Report submitted in partial fulfilment of the requirement for the award of the degree of Bachelor of Mechanical Engineering with Automotive Engineering Faculty of Mechanical Engineering UNIVERSITI MALAYSIA PAHANG JUNE 2013

2 ii EXAMINERS APPROVAL DOCUMENT UNIVERSITI MALAYSIA PAHANG FACULTY OF MECHANICAL ENGINEERING I certify that the report entitled Experiment and Analysis for Motorcycle Exhaust Design is written by Abdul Muiz bin Jaafar. I have examined the final copy of this paper report and in my opinion, it is fully adequate in terms of scopes and quality for the award of the degree of Bachelor of Mechanical Engineering with Automotive Engineering. I herewith recommend that it be accepted in fulfilment of the requirements for the degree of Bachelor of Engineering. Signature : Name of Examiner : Date :

3 iii SUPERVISOR S DECLARATION I hereby declare I have checked this report, which written by Abdul Muiz bin Jaafar, and in my opinion, this report project is adequate in terms of scopes and quality for the award of the degree of Bachelor of Mechanical Engineering with Automotive Engineering. Signature : Supervisor : DR. AHMAD SYAHRIZAN BIN SULAIMAN Position : LECTURER Date : 27 JUNE 2013

4 iv STUDENT S DECLARATION I hereby declare that the work in this report is my own, except for quotations and summaries which have been duly acknowledged. The report has not been accepted for any other Degree and is not concurrently submitted for award of other degree. Signature : Name : ABDUL MUIZ BIN JAAFAR Matric No. : MH09016 Date : 27 JUNE 2013

5 ix TABLE OF CONTENTS SUPERVISOR S DECLARATION STUDENT S DECLARATION DEDICATION ACKNOWLEDGEMENTS ABSTARCT TABLE OF CONTENTS LIST OF TABLES LIST OF FIGURES LIST OF SYSTEM LIST OF ABBREVIATION Page ii iii iv v vi ix xii xiii xv xvi CHAPTER 1 INTRODUCTION 1.1 Project Background Problem Statement Project Objective Scope of Project 3 CHAPTER 2 LITERATURE REVIEW 2.1 Introduction Exhaust Design for Engine Scavenging Performance Exhaust Pipe Length Intake and Exhaust Tuning Exhaust Megaphone Noise and Silencer 13

6 x CHAPTER 3 METHODOLOGY 3.1 Introduction Designing the Test Rig for Four Stroke Engine Analysis of Test Rig by FEA Fabrication of Test Rig GT Engine Specification Exhaust Design Experimental Study of Dynamometer Test Rig Preparation Experiment Procedure of Dynamometer 34 CHAPTER 4 RESULT AND DISCUSSION 4.1 Experiment Result Baseline Result of Engine GT128 with Standard Exhaust Result for Exhaust Length of 570mm Result for Exhaust Length of 1140mm Result Comparison of Baseline Graph with Difference Length of Exhaust Discussions Backpressure 42 CHAPTER 5 CONCLUSION 5.1 Conclusion Recommendation 45 REFERENCES 46

7 xi APPENDIX 48 A1 Engineering Drawing of Test Rig 48 A2 Raw Data of Experiment 51

8 xii LIST OF TABLE Table No. Title Page 1.1 Population of Motorcycle in January Intake and Exhaust Configuration List of material to fabricate Test Rig Material Properties of AISI 1005 Steel Tool used for Fabrication Engine Specification Engine Transmission Example data recorded 37

9 xiii LIST OF FIGURE Figure Title Page 2.1 Valve timing event showing valve overlap Valve Guide Tuned engine ingest exhaust gas into the cylinder during the overlap Reflection of rarefaction wave at exhaust pipe end which returns to the exhaust valve Variation of volumetric efficiency with intake and exhaust length Measured and calculated power and torque when change exhaust length Torque Curve for Intake and Exhaust Tuning Power Curve for Intake and Exhaust Tuning Exhaust Diffuser/Megaphone Horsepower for Exhaust Megaphone Torque for Exhaust Megaphone Power curve for silencer Noise level for silencer Flow Chart of Methodology Previous test Rig for FZ Flow Chart of Designing New Test Rig Isometric View of GT128 Test Rig Drawing of the Test Rig Boundary Condition and Force Applied to the Test Rid Result of Stress von Mises Result of Strain von Mises Displacement of Y Component Test Rig that Finish Left view of Test Rig Exhaust Pipe Length of 570mm Exhaust Pipe Length of 1140mm Test Rig of FZ150 31

10 xiv 3.15 Test Rig of GT Connector of Input and Output Shaft Cooling Tank for Dynamometer Indicator of Dynamometer is Ready to Use Control Panel of Speed, Torque and Button type of Experiment Throttle Lever Controller Engine Speed Reader Torque Reading on the Main Control Panel Graph of Torque and Power versus Speed Graph of Torque and Power versus Speed Graph of Torque and Power versus Speed Graph comparison between baseline parameter and difference length of pipe length 41

11 xv LIST OF SYMBOLS D ET L i L e kw L mm rpm Diameter of exhaust pipe Exhaust valve duration Intake length Exhaust length Kilowatt Length milimeter Rotational per minute

12 xvi LIST OF ABBREVIATIONS 1D CC CI CO 2 FEA MAI NOx SAE SI SOHC One Dimensional Centimeter Cubic Compression Ignition Carbon Dioxide Finite Element Analysis Malaysia Automotive Institute Nitrogen Oxide Society Automotive Engineering Spark Ignition Single Overhead Camp