Motorcycle ABS using horizontal and vertical acceleration sensors

Antilock braking system for a motorcycle having front and rear wheels, comprising:

• wheel sensors that output signals;
• a monitoring circuit coupled to the wheel sensors to receive the sensor output signals, and which detects overbraking states from the sensor output signals and generates corresponding control signals;
• A pressure modulator coupled to the monitoring circuit which adjusts brake pressures at the two wheels in response to the control signals;
• A curve pressure control, coupled to the monitoring circuit, that recognizes travel on curves and controllable regulated braking on curves, said curve pressure control having two acceleration sensors to determine the tilt angle .PHI. of the vehicle and, if this angle exceeds a critical threshold .PHI. krit, said curve pressure control causes the monitoring circuit to maintain, via the control signals, the brake pressure at the front wheel before an anticipated lockup pressure is reached;
• and
• wherein the acceleration sensors are mounted on the motorcycle such that a first one of the acceleration sensors detects horizontal vehicle acceleration perpendicular to a direction of travel and perpendicular to a vertical axis of the motorcycle, while a second one of the acceleration sensors measures vertical acceleration of the motorcycle at right angles thereto.