Method for controlling a force representative of a parking braking of a vehicle and system thereof

A method for controlling a force representative of a parking braking of a vehicle, the vehicle comprising at least one first wheel and a system for controlling the parking braking of the vehicle, the system comprising:

• a first brake disc operatively associated with said at least one first wheel;
• a first brake caliper operatively associated with said first brake disc, the first brake caliper being configured to apply the force representative of the parking braking on said first brake disc, said first brake caliper being adapted to receive a hydraulic pressure which can be applied by a first hydraulic actuator that can be operated to apply a first force contribution representative of a service braking of the vehicle on said first brake disc, said first brake caliper comprising a second electromechanical actuator, which can be operated to apply a second force contribution representative of the parking braking of the vehicle on said first brake disc;
• a data processing unit operatively connected to the first brake caliper;
• the method comprising steps of:
• determining, by the data processing unit, a target value of the force representative of the parking braking of the vehicle to be applied, by the first brake caliper, on the first brake disc on a basis of a value of a gradient of a road on which the vehicle is located;
• determining, by the data processing unit, a value of the first force contribution representative of the service braking of the vehicle applied by the first hydraulic actuator on the first brake disc;
• determining, by the data processing unit, a value of the second force contribution representative of the parking braking of the vehicle to be applied, by the second electromechanical actuator, on the first brake disc on a basis of the target value of the force representative of the parking braking of the vehicle which can be applied by the first brake caliper on the first brake disc, and on a basis of the determined value of the first force contribution representative of the service braking of the vehicle, the value EF of the second force contribution representative of the parking braking being calculated from the target value FT of the force representative of the parking braking, the value HF of the first force contribution representative of the service braking and also on a basis of a force margin FM due to a force fall at a removal of the hydraulic pressure by the formula FT-HF+FM;
• and
• operating, by the data processing unit, the second electromechanical actuator to apply the determined value of the second force contribution representative of the parking braking of the vehicle on the first brake disc;
• further comprising a step of comparing, by the data processing unit, the determined value of the second force contribution representative of the parking braking of the vehicle applied by the second electromechanical actuator on the first brake disc with the target value of the force representative of the parking braking of the vehicle which can be applied by the first brake caliper on the first brake disc;
• and
• further comprising a step of controlling, by the data processing unit, the operation of the second electromechanical actuator on a basis of a result of the step of comparing.