Patent ID: 7513343
Filing Date: 2009-04-07
Classification: F16D

Abstract:
1. A method for controlling a flow rate of a hydraulic oil in a brake cooling system of a vehicle, wherein the method comprises the steps of: delivery of the hydraulic oil to a proportioning valve at a constant flow rate; controlled splitting of the flow rate of the hydraulic oil coming out of the proportioning valve and directed towards a hydraulic brake cooling circuit to avoid exceeding a maximum oil pressure value in said hydraulic circuit, based on an oil temperature in the hydraulic circuit and a temperature of an engine coolant, wherein said step of controlled splitting of flow rate of the hydraulic oil coming out of the proportioning valve comprises: defining parameters: minimum engine coolant temperature TL checking the following conditions: in this condition, set DutyVP=100%, Q olio =0; in this condition, if TL−TO≦Δ on , setting DutyVP=100%, Q olio =0; if TL−TO≧Δ on , self-adaptively controlling of the value DutyVP; in conditions 3) and 4) setting DutyVP in proportion to the oil temperature TO, so as not to exceed a maximum oil pressure value in said hydraulic circuit.