×

Anti-skid controller having accurate road surface detection capabilities

  • US 5,719,565 A
  • Filed: 07/05/1996
  • Issued: 02/17/1998
  • Est. Priority Date: 07/07/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. An anti-skid controller comprising:

  • wheel braking force application means for applying a braking force to a wheel of a vehicle;

    wheel acceleration detection means for generating a wheel acceleration signal representative of a wheel acceleration of said wheel of said vehicle;

    high frequency component extraction means for extracting high frequency components no less than 20 Hz of said wheel acceleration signal, said high frequency component extraction means including a differential filter unit for extracting said high frequency components by first extracting low-frequency components of said wheel acceleration signal and then subtracting said low-frequency components from said wheel acceleration signal;

    dispersion condition detection means for determining a dispersion value indicative of a dispersion condition of said high frequency components;

    road surface condition detection means for determining a road surface condition based on said dispersion value;

    setting means for setting a control reference for adjusting said braking force applied to said wheel based on a vehicle speed of said vehicle;

    pressure adjustment means for adjusting said braking force applied to said wheel based on said control reference; and

    correction means for correcting said control reference based on said road surface condition.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×