METHOD OF VEHICLE ANTIBLOCK BRAKE SYSTEM AND ANTI-SKID SYSTEM CONTROL (ABS/ASS) Russian patent published in 2008 - IPC B60T8/00 B60T8/32 

FIELD: technological processes.

SUBSTANCE: time derivative of wheel rotation velocity sensor signal square function is estimated. Electric signal, which is proportional to derivative, is sent to optimizing peak-holding controller. Signal extremum is found, which corresponds to the extremum of brake or tractive power on the wheel and to the maximum wheel cohesion with bearing area. Current signal value is sustained near the extremum. Whenever the signal deviates from the extremum by more than pre-set value by the signals of optimizing peak-holding controller, control signals are formed and sent to the pressure modulator of brake drive or to the device of torque strength control, pressure is increased or decreased in the brake drive or wheel torque strength. In the second variant of the method, wheel rotation velocity sensor is sent to the inlet of control unit forming device, where signal frequency is squared, and signal is transformed into square pulses, which are sent during preset time period to one of the forward-backward counter inlets, and then during the same period of time - to the other counter inlet. Pulses difference from the counter outlet is transformed into proportional electric signal, which is sent to optimizing peak-holding controller, where difference is found between current and peak value of electric signal. Difference value is compared to preset value. If they are equal, control signals are formed and sent to the pressure modulator of brake drive or to devices of wheel torque strength control.

EFFECT: improves reliability of antiblock brake and anti-skid systems.

5 cl, 5 dwg