DongFeng Nammi 01 - Event Data Recording System (EDR)

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Technical Information
8
Event Data Recording System (EDR)
The vehicle is equipped with an Event Data Recording System (EDR).The implementation carrier of the system is an airbag ECU, which is mainly used to
monitor, collect and record the data of the vehicle and occupant protection system before, during and after collision events (collisions or other physical events
that reach or exceed the trigger threshold, or any other events that cause the deployment of airbags, air curtains, seat belt pretensioner, etc., whichever occurs
rst). This data will help to understand the operation of vehicle system.
To read the data recorded by the motor Vehicle Event Data Recording System (EDR), specialized equipment is required and access to the vehicle or motor
vehicle Event Data Recording System (EDR) is required. In addition to automobile manufacturers, other third parties with professional equipment, such as law
enforcement parties, can read the corresponding information if they have the right to use the vehicle or automobile event data recording system (EDR).
● Event Data Recording System (EDR) data reading device model:X431-PRO5 diagnostic instrument.
● Access to Event Data Recording System (EDR) data reading equipment:EDR system data extraction tools are provided by suppliers specified by the
competent department, and can be purchased from franchise stores or suppliers.
In case of a serious collision accident with airbag deployment, the data stored in EDR will be locked and cannot be overwritten. Other collision data will be
overwritten by the latest accident data.
The vehicle accident recording system in this vehicle records the following data:
N0. Name Data Usage Explanation
1a Longitudinal delta-V Represents the change in vehicle's longitudinal speed. Longitudinal delta-V is only the longitudinal component of the total delta-V.
2a
Maximum Recorded Longitudinal
delta-V
Represents the maximum cumulative change in vehicle speed in the X-axis direction recorded by the EDR. This data should be
used in conjunction with "Time to Maximum Recorded Longitudinal delta-V".
3a
Time to Maximum Recorded
Longitudinal delta-V
Along the X-axis, the time from zero point to the occurrence of the maximum cumulative speed change recorded by the EDR.
This data should be used in conjunction with "Maximum Recorded Longitudinal delta-V".
4b Clipping Flag Indicates the time point when an accelerometer rst reaches the maximum value within the specied range.
5 Vehicle Speed Vehicle speed obtained from wheel edge linear speed or other methods.
6 Driving Brake, On or Off Used to detect whether the driver has depressed the brake pedal.
7 Driver Seat Belt Status Records the status of the driver's seat belt buckle switch.
8c,d
Accelerator Pedal Position,
Percentage of Full Open Position
Records the actual position of the accelerator pedal as a percentage of the fully depressed position by the driver.
Vehicle Identication