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Stability control reaches motorbikes

Stability control reaches motorbikes

Technology News |
By eeNews Europe



The MSC has been developed from the ABS for motorbikes as the technology platform. However, new functions are added that require additional sensors and sophisticated algorithms. The system offers multiple safety functions with regards to the driving dynamics. For example,

  • the lean and pitch angle-dependent ABS control improves riding stability in all riding situations as well as braking effectiveness.
  • The traction control regulates the maximum engine torque so that even on chaging or slippery road surfaces, the driving force is efficiently transferred to the road and the drive wheel does not lose its grip.
  • when braking heavily in curves, the MSC reduces the motorcycle’s tendency to return to an upright position. This involuntary righting of the machine leads to a larger cornering radius, which often results in the motorcycle leaving its lane. In these situations, the eCBS electronic combined brake system creates the best possible distribution of brake force between the wheels, and thus stabilizes the bike during cornering.
  • The MSC also reduces the risk of “lowsiders.” These are accidents in which the motorcycle capsizes during cornering and the wheels slide out toward the outside of the bend. They occur when too much brake force is applied during cornering and the wheels are not able to transfer sufficient side force onto the road. MSC counteracts this by detecting the risk of a lowsider and limiting the maximum brake force. The eCBS function distributes this maximum available brake force between the wheels, ensuring the best possible brake performance
  • The wheelie-mitigation controls the engine torque, preventing the front wheel from lifting uncontrollably and at the same time ensuring maximum acceleration.
  • The rear-wheel lift-up mitigation function keeps the rear wheel on the road by reducing the maximum brake force on the front wheel when riding on surfaces with high friction coefficients. Riding stability is maintained, taking pitch rate and longitudinal acceleration into account.

The motorcycle stability control uses an extensive array of sensors to register the driving dynamics of the machine. Wheel sensors measure the rotational speed of the front and rear wheels, and an inertia sensor module computes the vehicle’s lean and pitch angles more than 100 times per second. By analyzing the sensor data, the difference in speed between front and rear wheels, as well as other motorcycle-specific parameters such as tire size, tire shape, and sensor location, the ABS control unit calculates the physical limits of brake force on the basis of lean angle.

Starting end of the year, the motorbike manufacturer KTM will equip its models 1190 Adventure and 1190 Adventure R with the new stability control, Bosch said.

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