Braking system for brake by wire vehicles provided with hydraulic feedback simulator, and actuation method of a braking system for vehicles

A braking system for vehicles comprising:

• a pilot pump provided with a lever and/or pedal-operated manual actuation device, which is fluidically connected, via a first hydraulic duct to an absorber device which simulates the drive resistance offered by at least one braking device associated with a wheel of said vehicle, wherein, along said first hydraulic duct a first shut-off valve is arranged,
• at least one electromechanical and/or electro-hydraulic actuator device, operatively connected to at least one electricity storage device and to said at least one braking device for the actuation of the latter,
• at least one sensor, belonging to a group comprising position sensors of the stroke and/or rotation of the lever or pedal operated manual actuation device or of a float or of a push-rod of the pilot pump, force sensors of the force applied to said lever or pedal operated manual actuation device or to the float or cylinder of the pilot pump, pressure sensors of the pilot pump delivery pressure, suitable to detect the occurrence and magnitude of a braking action request,
• the braking system comprising at least one control unit operatively connected to said at least one sensor and to the at least one actuator device and being programmed so as to actuate the braking device via the actuator device when it receives from said at least one sensor a braking action request signal,
• wherein the control unit is programmed to actuate the actuator device without input to the lever and/or pedal-operated manual actuation device so as to avoid blocking of one or more wheels or the occurrence of instability of the vehicle during braking,
• wherein the control unit is programmed to induce on the manual actuation device at least one vibration when the control unit corrects the braking action, wherein the vibration is adapted to provide input from the braking system to an object that is resting on the manual actuation device,
• wherein said input to the braking system does not lengthen a stroke of the lever and/or pedal-operated manual actuation device,
• wherein said at least one sensor comprises a dual power supply via two distinct electricity storage devices.