Formula SAE Rules
2015-2016 Rules Clarifications to be added as Addendum
Use of Commercial ETC/ECU for ETC
The Rules Committee recognizes that there are several ETC (Electronic Throttle Control) systems on the market that do not comply with the letter of the ETC regulations, however they do comply with the intent of the regulations.
For example, IC1.15.2 requires a TPS error of >10% relative to target for 1 second to result in power to be shutdown. For a commercial ETC/ECU system, these may be set at different values and cannot be changed to meet the rule.
In this case the Rules Committee may approve the commercial ETC/ECU on a case by case basis. If your team wants to use an ETC system that is commercially available but does not comply with the regulations:
· Submit a rules question to ask your competition if that ETC can be used
· Include with the rules question the specific ETC rule(s) and how the commercial system deviates from these rule(s).
· Include sufficient technical details of the commercial system rule deviations to allow the acceptability of the commercial system to be determined.
IC4.4.4 Battery packs based on Lithium Chemistry
LiFePO4 batteries will be accepted without over voltage, under voltage and over temperature protection, however all other aspects of IC4.4.4 must be met. Short circuit protection must be provided internal or external to the battery.
Commercially manufactured LiFePO4 batteries will be accepted without over voltage, under voltage and over temperature protection, however all other aspects of EV3.7.4 must be met.
IC4.6 Voltage limit for IC vehicles
It was not the intention of the rules committee to introduce more restrictive voltage limits within the IC category which prevents the use of OEM 12V charging systems. If the charging system is OEM and designed for a DC battery voltage less than 60V then the 25VAC limit of rule IC4.6 does not apply, however the system must either use the stock wiring between the generator and the rectifier, or this wiring must be rated to at least the maximum output voltage of the rectifier.
If student teams are electing to build a charging system then rules must be followed.
Pop-off (aka blow-off) valves located between the compressor discharge and throttle body that vent directly to atmosphere are permitted for turbochargers and superchargers.
Note that these valves will be carefully inspected in Tech for compliance to the intent of rule IC1.7.3 which is only to relieve surge when the throttle is closed and not to allow flow to bypass the restrictor under non-boosted conditions. All flow for the engines must pass through a single intake restrictor per rule IC1.1.3.
EV9.2 Failure Modes and Effects Analysis (FMEA) Clarification
The following supersedes the 2015 Formula SAE rules for the 2015 Formula SAE Electric competition (in Lincoln, NE) only.
• Teams may use their frame constructed for the 2014 Formula SAE Electric event if the frame meets or is modified to meet the applicable FSAE 2015 frame rules (Section T3 or Section AF). Rule A6.6.2 will not apply.
• The Failure Modes and Effects Analysis (FMEA) per EV9.2 does not need to be submitted. References to the FMEA in rules A5.3.6, EV2.3.11, EV2.4.6, T7.1.10, and S2.4 may be ignored.
Please note that the deadline for the required Electric Safety Form remains January 12, 2015.