Patent ID: 6045199
Filing Date: 2000-04-04
Classification: B60T,G01P

Abstract:
A brake valve control method comprising inputting and processing signals from plural wheel speed sensors by an arithmetic logic unit to control plural respective brake valves of a vehicle, said processing including computing respective wheel speed using signals from a wheel speed sensor, deriving a direction of a change of computed velocity, counting signals from said wheel speed sensor for a short prescribed time period and deriving an short-term approximate wheel speed corresponding to a first count value, counting signals from said wheel speed sensor for a long prescribed time period and deriving a long-term approximate wheel speed corresponding to a second count value, and deriving a direction of an approximate change in velocity from said short-term approximate wheel speed and said long-term approximate wheel speed; whereinif the direction of the computed change in velocity is the same as the direction of the approximate change in velocity, then processing to control the valves is continued; and if the direction of the computed change in velocity differs from the direction of the approximate change in velocity, then processing to control the valves is suspended.