Rules (DEPRECATED)

GO READ THE NEWEST FSAE RULES AVAILABLE IN SDK OR DRIVE

T7.1.10 EV ONLY: The first 90% of the brake pedal travel may be used to regenerate brake energy without actuating the hydraulic brake system. The remaining brake pedal travel must directly actuate the hydraulic brake system, but brake energy regeneration may remain active. Any strategy to regenerate energy whilst coasting or whilst braking must be covered by the FMEA

EV2.2 Power and Voltage Limitation EV2.2.1 The maximum power drawn from the battery must not exceed 80kW. This will be checked by evaluating the Energy Meter data. EV2.2.2 The maximum voltage in the tractive system must not exceed the voltage defined in EV1.1.2. This will be checked by evaluating the Energy Meter data. EV2.2.4 A violation is defined as using more than 80kW or exceeding the specified voltage for more than 100ms continuously or using more than 80kW or exceeding the specified voltage, after a moving average over 500ms is applied. EV2.2.7 Regenerating energy is allowed and unrestricted

EV2.3.4 At least two separate sensors have to be used as torque encoder. Separate is defined as not sharing supply or signal lines. EV2.3.5 If an implausibility occurs between the values of these two sensors the power to the motor(s) must be immediately shut down completely. It is not necessary to completely deactivate the tractive system, the motor controller(s) shutting down the power to the motor(s) is sufficient. EV2.3.6 Implausibility is defined as a deviation of more than 10% pedal travel between the sensors.

EV2.4.2 The brake system encoder may be used to control regenerative braking

EV2.4.5 When an analogue signal is used, e.g. from a 5V sensor, the brake system encoder sensors will be considered to have failed when they achieve an open circuit or short circuit condition which generates a signal outside of the normal operating range, for example <0.5V or >4.5V. The circuitry used to evaluate the sensor will use pull down or pull up resistors to ensure that open circuit signals result in a failure being detected.

EV2.5 Torque Encoder / Brake Pedal Plausibility Check The power to the motors must be immediately shut down completely, if the mechanical brakes are actuated and the torque encoder signals more than 25% pedal travel at the same time. This must be demonstrated when the motor controllers are under load.

EV4.10 Activating the Tractive System EV4.10.1 The driver must be able to (re-)activate or reset the tractive system from within the cockpit without the assistance of any other person except for situations in which the AMS, IMD or BSPD have shut down the tractive system, see EV5.1.4 and EV5.1.5. EV4.10.2 Only closing the shutdown circuit must not set the car to ready-to-drive mode. The car is ready to drive as soon as the motor(s) will respond to the input of the torque encoder / acceleration pedal. Therefore additional actions are required by the driver to set the car to ready-to-drive-mode e.g. pressing a dedicated start button, after the tractive system has been activated. One of these actions must include the brake pedal being pressed as ready-to-drive-mode is entered.

EV4.11 Pre-Charge and Discharge Circuits EV4.11.1 A circuit that is able to pre-charge the intermediate circuit to at least 90% of the current accumulator voltage before closing the second AIR must be implemented. This circuit must be disabled by a de-activated shutdown circuit, see EV5.1. Therefore the pre-charge circuit must not be able to pre-charge the system, if the shutdown circuit is open. EV4.11.2 Any pre-charge circuitry must be supplied directly from the TSMS

EV4.13 Ready-To-Drive-Sound EV4.13.1 The car must make a characteristic sound, continuously for at least 1 second and a maximum of 3 seconds when it is ready to drive. EV4.13.2 The car is ready to drive as soon as the motor(s) will respond to the input of the torque encoder / accelerator pedal.

EV5.1.2 The shutdown circuit consists of at least 2 master switches, 3 shut-down buttons, the brake-over-travel-switch, the insulation monitoring device (IMD), the inertia switch, the brake system plausibility device, all required interlocks and the accumulator management system (AMS).

Relevant but not directly accomodated by software

T7.2 Brake Test T7.2.1 The brake system will be dynamically tested and must demonstrate the capability of locking all four (4) wheels and stopping the vehicle in a straight line at the end of an acceleration run specified by the brake inspectors. T7.2.2 EV ONLY: After accelerating the tractive system has to be switched off by the driver and the driver has to lock all four wheels of the vehicle by braking. The brake test is passed if all four wheels lock while the tractive system is shut down. NOTE: It is acceptable for the Tractive System Active Light to switch off shortly after the vehicle has come to a complete stop as the reduction of the system voltage may take up to 5 seconds.

T7.3 Brake Over-Travel Switch