Patent ID: 6266603
Filing Date: 2001-07-24
Classification: B60W,F16H

Abstract:
A method of detecting slippery ground for a vehicle with an automatic transmission, comprising the steps of:detecting an instantaneous running condition of driving wheels;generating a revised condition value representing a time change in the running condition of the driving wheels bydecrementing a current wheel condition value by a first step (.DELTA.x.DELTA.B) each time a locking of the driving wheels is detected in the detecting step,decrementing the current wheel condition value by a second step (.DELTA.x.DELTA.E) each time a spinning of the driving wheels is detected in the detecting step, andincrementing the current wheel condition value by a third step (.DELTA.xout) each time neither a locking of the driving wheels nor a spinning of the driving wheels is detected in the detecting step;comparing the revised condition value with a reference condition value; andbased on the comparison of the revised condition value with the reference condition value, deciding whether or not the instantaneous running condition corresponds to a slippery ground condition.