Project Summary
Because regenerative braking is utilized in FSAE endurance racing, brake bias must be changed when regenerative braking is activated. Traditionally, this requires the driver to repeatedly twist an adjustment knob while driving, which is both distracting and inefficient. To combat this, assisted brake biasing systems utilize a motor to move the bias bar, allowing the driver to adjust it simply by pushing a button.
This biasing system involved defining an appropriate bias adjustment range, selecting and packaging actuation hardware, and integrating the system within the existing hydraulic braking architecture in compliance with FSAE safety regulations. In addition to system-level design, I was responsible for CAD integration, mounting design, and interface definition with driver controls and vehicle electronics. This design establishes a tunable braking platform intended for continued refinement and validation in future vehicle iterations.
Design Requirements
Load Capacity: Must withstand compliance from the bias bar under maximum braking load
Reliability: Must not compromise performance in the case of electronic failure
Rules Compliance: Must be implemented into existing rules-compliant hydraulic brake circuits.
Servicability: Allow for easy disassembly, maintenance, and part replacement
Project Details
Year: 2025/2026
Role: Driver Interface & Brakes Member/Lead
Duration: 2 months
Software: Fusion 360, Aruino IDE
Materials: Various
Concept
Due to the preexisting mounting bolt holes on the VM25E pedalbox (which will be carried over to the VM26E), mounting solutions for a continuous servo are relatively simple. A simple FDM printed bracket fixed to the pedal box base plate will hold the servo motor in alignment with the bias bar, while a very short section of wire transmits the motion of the motor to the bias bar. Buttons on the steering wheel will allow the driver to make adjustments to the brake bias on the fly.
Mounting solution shown in the picture.
Validation and Future Work
Potential time savings in a competition endurance event
The servo motor is tested and confirmed to be able to turn the bias bar reliably
A stronger FDM mount will be printed using CF filament
The full assembly will be manufactured, tested, and implemented for use on the VM26E EV
Pictured: VM26E steering wheel with buttons for easy bias adjustment