Patent ID: 6234583
Filing Date: 2001-05-22
Classification: B60T

Abstract:
A method of adjusting a predetermined, variable braking pressure in wheel brakes of a brake system, including the steps of:establishing input quantities for determining a braking pressure in the individual wheel brakes in a control and data-processing system and control variables of elements by which the braking pressure is controlled; input quantities which determine a braking pressure in the individual wheel brakes are ascertained in a control and data-processing system, and control variables of elements, by which the braking pressure is controlled, are established;weighting the input quantity which determines the braking pressure and the time derivative of said input quantity for each individual wheel brake, and adding said input quantity and the time derivative of said input quantity for each individual wheel brake in a pressure controller to provide a sum; the input quantity which determines the braking pressure and the time derivative of this input quantity is weighted for each individual wheel brake and the weighted quantities are added in a pressure controller;communicating said sum to a non-linear transmission element and determining a pressure fluid volume flow from said sum by way of said non-linear transmission element as a function of a valve characteristic; and the sum is sent to a non-linear transmission element, wherein a pressure fluid volume flow is determined from the sum by way of the non-linear transmission element in dependence on the characteristic of the elements; andestablishing activation times of the elements controlling the pressure increase and decrease as a function of the determined pressure fluid volume flow and the valve characteristic; establishing actuation times of the elements controlling the pressure increase and the pressure decrease is established as a function of the determined pressure fluid volume flow and the element characteristic.