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US 10,647,308 B2Granted
Brake-by-wire braking system for vehicles provided with hydraulic feedback simulator and method of actuating a braking system for vehicles thereof
AssigneeFreni Brenbo S.p.A.
InventorsFabio Alemanno, Francesco Dozzi, Luca Ugolini, Fabrizio Forni, Luca Pagani, Beniamin Szewczyk, Valerio Galizzi
Life of this patent
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Abstract
A braking system for vehicles having a processing and control unit operatively connected to a pilot pump and a motor for actuating at least one braking device. The processing and control unit being programmed so as to actuate the braking device via the motor as a function of the actuation of the pilot pump through a manual actuation device, in a “by-wire” operating condition.
Claims6
A braking system for vehicles comprising
- a pilot pump equipped with a manual actuation device comprising a lever or pedal, which is fluidically connected, through a first hydraulic conduit, to a sorbing device that simulates the actuation resistance offered by a hydraulically operated braking device, wherein along said first hydraulic conduit is arranged a first shut-off valve,
- a second hydraulic conduit operatively connected to at least one braking device associated with a wheel of said vehicle, said second hydraulic conduit being connected to the first hydraulic conduit through a second shut-off valve,
- the system comprising a processing and control unit operatively connected to the pilot pump and a motor for actuating said at least one braking device, the processing and control unit being programmed so as to actuate the braking device via the motor as a function of the actuation of the pilot pump through the manual actuation device, in a “by-wire” operating condition,
- in said “by-wire” operating condition, the first shut-off valve being selectively opened and the second shut-off valve being closed,
- wherein
- the processing and control unit is programmed to oversee the operation of the braking system so as to correct the braking action requested by a user via the manual actuation device, by actuating the motor so as to avoid the locking of one or more wheels or the onset of instability of the vehicle during braking,
- said processing and control unit being programmed to induce on the manual actuation device at least a vibration when it corrects the braking action requested by the user,
- wherein the processing and control unit is programmed so that, during the correction of the braking action requested by the user, it alternately opens and closes the first shut-off valve so as to create a pressure variation on the manual actuation device;
- wherein the system comprises at least one device for varying the pressure in the first hydraulic conduit operatively connected to the processing and control unit so as to change the pressure in said first hydraulic conduit to induce at least a vibration on the manual actuation device, during the correction of the braking action requested by the user.
6 more elements
An actuation method of a braking system for vehicles comprising the steps of:
- providing a pilot pump equipped with a manual actuation device comprising a lever or pedal, which is fluidically connected, through a first hydraulic conduit, to a sorbing device that simulates the actuation resistance offered by a hydraulically operated braking device, wherein along said first hydraulic conduit is arranged a first shut-off valve,
- providing a second hydraulic conduit operatively connected to at least one braking device associated with a wheel of said vehicle, said second hydraulic conduit being connected to the first hydraulic conduit through a second shut-off valve,
- providing a processing and control unit operatively connected to the pilot pump and to a motor for actuating said at least one braking device as a function of the actuation of the pilot pump through the manual actuation device, in a by-wire operating condition, in said by-wire operating condition the first shut-off valve being selectively open and the second shut-off valve being closed,
- correcting the braking action requested by the user via the manual actuation device, via the processing and control unit which actuates the motor so as to avoid locking of one or more wheels or the onset of instability of the vehicle during braking, and
- inducing on the manual actuation device at least a vibration when the processing and control unit corrects the braking action requested by a user
- wherein the system comprises at least one device for varying the pressure in the first hydraulic conduit operatively connected to the processing and control unit so as to change the pressure in said first hydraulic conduit to induce at least a vibration on the manual actuation device, during the correction of the braking action requested by the user.
3 more elements
Dependencies are inferred from the claim text.