Patent ID: 6612661
Filing Date: 2003-09-02
Classification: B60T,Y10S

Abstract:
A brake device comprising:brakes provided for front and rear wheels and that generate braking forces corresponding to fluid pressures that change through braking operation; rotational speed detectors that detect rotational speeds of the wheels of a vehicle; a deceleration calculator that calculates a vehicle body deceleration based on detection results of the rotational speed detectors; a plurality of filters that filter the vehicle body deceleration obtained from the deceleration calculator, the plurality of filters having different cut-off frequencies; and an operating speed detector that detects a brake operating speed based on respective output values obtained from the plurality of filters; wherein the vehicle body deceleration is input into each of the plurality of filters, the plurality of respective output values are supplied to the operating speed detector which then detects the brake operating speed based on the plurality of respective output values, the operating speed detector detects the brake operating speed based on a state of distribution of the output values obtained from the plurality of filters, and the operating speed detector specifies, based on the state of distribution of the output values, a filter from the plurality of filters whose output value is damped with respect to its input value, and calculates the brake operating speed based on a cut-off frequency of the specified filter.