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The Effects of Forced Induction on a Connecting Rod Milo James Ward Dr Owen Williams

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The Effects of Forced Induction on a Connecting Rod Milo James Ward Dr Owen Williams The Effects of Forced Induction on a Connecting Rod Milo James Ward Dr Owen Williams School of Engineering BEng (Hons) Motorcycle Engineering The cylinder pressure data was taken forward on Excel to calculate Introduction SolidWorks model of the the resolved force on the connecting Kawasaki ZX6R rod. This was 35964N for the In modern day, forced induction can connecting rod that was often be found in many cars on the used throughout the standard model and 43663N for the road. However, there is a lack of this project. supercharged. This was inputted into technology in the world of the motion simulation. motorcycles. FEA and Excel calculations of the stress, yield point and safety factors of the materials used under the standard This project investigated the effects Results cylinder pressures and supercharged. of increased cylinder pressure that is Power from all models TABLE 1: Von Misses Stress, 180 caused by forced induction and how 160 yield and Safety Factor 140 a standard connecting rod would 120 Conditions Von Yield Point Safety 100 Real Life Dyno Run (BHP) deal with this. Focusing on a 600cc 80 WAVE Standard Engine Model (BHP) Misses (N/mm^2) Factor Power (BHP) 60 8:1 BHP (N/mm^2) motorcycle engine. 40 20 0 Standard 464 470 1.95 Using Ricardo WAVE and 0 5000 10000 15000 20000 SolidWorks, in depth models were RPM Superchar 469 470 1.6 created to simulate the engine in Power Comparison from the real-life dyno graph, ged the standard WAVE model and a supercharged Titanium 466.2 827.4 2.2 terms of engine performance and a WAVE model. resultant motion simulation. Conclusion Cylinder Pressure @14400 200 It was noted that with the 180 Cylinder Pressure 160 data generated via supercharger the stress was just 140 Ricardo WAVE. The 120 below yield and the safety factor was 100 14400 RPM (8:1) supercharged model 14400 RPM (13.3:1) 1.6. Suggesting that the connecting Methodology 80 used a gear driven 60 14400RPM N/A Cylinder Pressure Cylinder Pressure (Bar) supercharger with a 40 rod would have an increased risk of This project had three main tasks: 20 gear ratio of 5. 0 breaking. • Develop an understanding of -200 0 200 400 600 800 Crank Angle (Degrees) forced induction and how to However, it was decided that the implement it. material used during the project was • Create an accurate computer not the correct material. Although, aided design (CAD) model of the the project does allow for a realistic 600cc engine. comparison between standard and supercharged connecting rod forces. • Produce a realistic Ricardo WAVE model of the standard 600cc By using a Titanium con rod, the part engine and implement forced could easily deal with the increased induction into this. pressure and a supercharger could be used. The task involved gaining a detailed understanding of forced induction, Acknowledgements looking into the history, how forced Compressive Displacement FEA from the 8:1 Supercharged data. Showing a displacement of 0.22mm. I would like to express gratitude to G&S induction works and where the It was calculated on excel to displace 0.25mm. Racing for providing various engine technology is now. components, allowing this project to move forward. Rhodri Owen from Ricardo for his Multiple engine components were help and guidance and to various others created in CAD, including the piston, who provided advice when it was needed. connecting rod, gudgeon pin and crankshaft. A motion simulation of a References rotating engine was created with this SolidWorks. (2020, January). SolidWorks Software. parts so that detailed analysis could Retrieved from SolidWorks : https://www.solidworks.com/ be completed using cylinder Ricardo. (2020, January). Ricardo WAVE Software. Retrieved from Ricardo: pressure data produced via the https://software.ricardo.com/products/wave WAVE model. Von Mises Stress of 466.2N/m on a modified Titanium connecting rod, used as a suggested2 improvement. School of Engineering.
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