Accelerator Pedal Arm

Subteam: ChassisSubsystem: PedalsAssembly: PedalsCars: CR25, CR26I

Purpose

Convert the driver's foot travel into rotation of the accelerator pedal position sensor.

Function

A lever pivoting on the accelerator pin in the accelerator tray. Because the car runs electronic throttle, this arm drives a sensor rather than a cable.

Design Process

The tray and rail for the accelerator match the brake pedal design so the adjustment method is the same for both. The design also reduces accelerator pedal weight and includes a heel cup to support the driver's heel. Validation is by timing the adjustment against the CR22 system and by weight.

Manufacturing Process

Waterjet from 6061-T6 plate. From the design reports and one-pagers: CR25 one-pager estimates: mill the tray 5 to 8 hours, mill the rail 2 hours. Materials: pedal tray from 6061-T6 aluminium rectangular bar about $25, pedal rail from 4130 steel square tubing about $29, cam lever and locking pins $30, total about $84.

Full Material List

6061-T6 aluminium.

Reoccuring issues

None recorded. This part has no entry in Knowledge_Transfer/Issue Logging/Fault Vault.xlsx, in either Issue Log.xlsx, in CR22/Issue Tracking/Shakedown 7-15-23.xlsx, or in any design review issue list found in CrimsonStorage or Box.

Still to document

Nothing in CrimsonStorage covers these yet.

Design Constraints — What held back the design whether it be location, time, materials etc
Analysis — How you get quantitative, predictive information on the part
Improvements — Improvements for this generation
Properties — Size, weight, mass, charge, thermal properties, anything else relevant