Program of road surface gradient decision device and manner, and gradient decision

摘要

An apparatus for judging road surface gradients including a speed detecting means for periodically detecting wheel speeds of four wheels of a vehicle, a vehicle body speed calculating means for obtaining a vehicle body speed of the vehicle, a slip rate calculating means for obtaining a slip rate, a means for calculating acceleration of the vehicle body for obtaining an acceleration of the vehicle body of the vehicle, a determining means for determining whether the acceleration of the vehicle body is within a specified range proximate to zero and a gradient judging means for judging a gradient of a road surface ON the basis of the determination of the determining means. The gradients of road surfaces might be judged without using various sensors but only ON the basis of information which can be obtained from a speed detecting means for detecting wheel speeds.