General Motor

The engine being the heaviest component of the car its position and mounting on the chassis has a significant effect on the dynamics of the car. The weight of the engine with all the fluids is around 40 kg which is nearly 25% of the total weight of the car. Knowing the Centre of Gravity of the engine with the help of the COG experiment we were able to position the engine in such a way that the CG of the engine remains as low as possible. After trying different orientation of the engine within the chassis we opted to mount the engine at an angle of 5⁰ with respect to vertical. This has allowed us to have the COG of the engine to be as low as 480 mm above the ground. The front engine mounting point also incorporates the Anti-Vibration Mounts made of Polyurethane. The mounting is designed in such a way to avoid any metal to metal contact with the chassis thereby resulting damping of vibration in all 6 axial directions. All the engine mounts were designed using structural analysis.

My long-lasting fascination for cars has taught me that the quality and comfort of the automobile is paramount. As a customer and an engineer who has worked on cars before, I have great respect for General Motors for its attention to detail. While optimizing vehicle performance is essential, prioritizing customer experience should be one of the goals of automakers, especially in countries where roads are rid of potholes. I’m currently working in collaboration with General Motors for my Capstone Project for my MEng in Berkeley. I am developing an electrified simulation model on MATLAB/Simulink and designing the control system to dampen the vibrations generated due to high speed motor. The project is not only making the system safer and sustainable but also pushing the limits of transportation and technology towards improved human comfort.

The following are the project objectives:
• Creating dynamic physics model to accurately represent a vehicle driveline driven by electric motors
• Conduct in-vehicle testing to characterize the dynamics of the vehicle so the model can be tuned to match
• Designing feedback controls to provide damping to the system while being robust to system parameter variations.
• Exploring new technologies and approaches to control strategies in automotive drivelines to overcome system limitations

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