“C-wagon” EV System Design

2023

Coursework

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Summary


"C-WAGON" project focused on an all-electric luxury vehicle with an innovative all-wheel-drive powertrain.
- Introduced a dual differential system tailored for both low-speed acceleration and high-speed cruising efficiency.
- Gearless drivetrain optimized using mathematical models and real-world requirements, enhancing compactness and reliability.
- Comprehensive power curve formulated, setting new performance and efficiency benchmarks for future electric vehicle designs.

The "C-WAGON" project aimed to design an all-electric luxury vehicle, and a pivotal component was the development of a state-of-the-art powertrain and drivetrain system. As the lead designer, I conceptualized an all-wheel-drive electric powertrain to ensure efficient power distribution across varying speed ranges.

A dual integrated differential system was innovatively introduced. The front motor set, optimized for peak performance at 60mph, was juxtaposed with a rear motor set, tailored for a 30-mph peak, ensuring rapid acceleration in low-speed scenarios and high motor efficiency during high-way cruising. This design promised a breakthrough in vehicular acceleration, achieving theoretical 0-60 mph in a mere 2.20 seconds.

To further optimize efficiency, the drivetrain was devoid of gears, with the differential ratios being derived from mathematical models and real-world requirements, such as the wheel diameter. An integrated differential system was adopted, which not only enhanced reliability but also minimized spatial requirements, echoing modern compact design principles.

By leveraging manufacturer data and derived differential ratios, a comprehensive power curve was formulated. This curve served as a blueprint, delineating the power distribution dynamics between the front and rear motor sets across various driving scenarios.

Lastly, a meticulous evaluation of the energy system was undertaken, anchoring the vehicle's performance in optimal energy utilization, setting benchmarks for future electric vehicle designs.

This project was advised by Professor Yan Jin and completed as a team with other members at USC.

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