EVU XXIV 2015-02 Holtkoetter – Investigation of ESC-interventions during braking and skidding processes, skid marks and signal manipulation
Investigation of ESC-interventions during
braking and skidding processes,
skid marks and signal manipulation
Modern electronic stability control systems (ESC) such as ESP, VSA, PSM, DSTC etc.
are intended to ensure optimal traction of the tyres on the road surface and the stability of
the driving process under any circumstances while allowing the driver’s intervention. In a
series of tests observing the braking and skidding processes of a modern vehicle with a
current ESC system, engine- and sensor-CAN-bus data are documented in order to study
the mode of operation of such systems, taking into consideration potentially critical
situations as well as technical malfunctions. These investigations provide a deep technical
insight not only into the mode of operation of these systems but also into driving physics.
The data include, for example, the individual wheel speeds, the brake system pressure,
the steering angle and the yaw rate.
Deliberate manipulation of the sensor data is used to examine whether technical
interferences of the ESC system can cause unintentional and dangerous interventions in
the stability of the driving process. With regard to accident reconstruction, the formation of
tyre marks in spite of integrated ABS and ESC systems is also documented and analysed.
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