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Braking hard while leaning into a bend on a slippery road? Or accelerating on wet surface? Riders can now handle these and other critical driving situations safely and confidently. Thanks to motorcycle stability control, riders can brake and accelerate, whether on straight roads and negotiating bends, without sacrificing the dynamic performance of their bike or the fun of the ride — but now with a reassuring feeling of safety too.
The system constantly measures all key motorcycle data: wheel speed, lean angle, pitch angle, acceleration, braking pressure and many more. This data allows to recognize critical situations and intervene, thereby preventing the wheels from locking when braking, stopping the wheels spinning, mitigating that the rear wheel from lifting, as well as making sure that the front wheel stays on the ground.
At the end of 2014, Bosch launched MSC base, a new variant of the motorcycle stability control (MSC) system. It is the first MSC to be based on conventional ABS technology. This technology features two separate braking channels, and has the advantage of being cost-efficient and compact. With MSC base, Bosch offers lean angle-dependent support for nearly every type of motorcycle. It complements the MSC enhanced system, which is based on a combined braking system and was launched at the end of 2013.
Motorcycle manufacturers can also expand MSC base with a number of optional features. For example, a lean angle-dependent drag torque control counteracts the critical situations that arise when drive torque suddenly increases or drops. The system can also adjust brake pressure on inclines. Furthermore, an off-road control can be integrated for rides on unpaved roads.
Technically, the MSC enhanced system is based on a Bosch ABS enhanced with electronic combined brake function. This means both wheels can be braked, even if the rider only applies the front brake, ensuring that the best possible braking force is applied to each wheel. The ABS control unit senses the brake wish on the front wheel and actively brakes the rear wheel by the help of an active pressure built-up. A lean-angle sensor measures the actual lean of the motorcycle, allowing the system to instantaneously adjust its electronic braking and acceleration interventions to suit the current riding status.
Precise control offers a smooth progression in brake pressure as the rider leans in for the corner, as well as boosting deceleration on the straight. And by analyzing pitch rate and linear acceleration, the system can tell sooner when the front or rear wheel is about to lift off, allowing MSC to intervene with a corrective action. Brake force is distributed flexibly and fast between the front and rear wheel according to the driving situation, ensuring the safest and best possible deceleration.