US 12,403,881 B2
Bicycle hydraulic disc braking system and a method and system for diagnosing the braking system
Mario Meggiolan, Creazzo (IT); Filippo Bove, Padua (IT); and Stefano Rubini, Monticello Conte Otto (IT)
Assigned to CAMPAGNOLO S.R.L., Vicenza (IT)
Filed by CAMPAGNOLO S.R.L., Vicenza (IT)
Filed on Jul. 28, 2022, as Appl. No. 17/875,629.
Claims priority of application No. 102021000020564 (IT), filed on Jul. 30, 2021.
Prior Publication US 2023/0036646 A1, Feb. 2, 2023
Int. Cl. B60T 17/22 (2006.01); B62J 3/14 (2020.01); B62J 45/40 (2020.01); B62L 3/02 (2006.01); B62J 6/24 (2020.01); B62J 50/22 (2020.01)
CPC B60T 17/22 (2013.01) [B62J 45/40 (2020.02); B62L 3/023 (2013.01); B62J 3/14 (2020.02); B62J 6/24 (2020.02); B62J 50/22 (2020.02)] 20 Claims
OG exemplary drawing
 
1. A method for diagnosing a bicycle hydraulic disc braking system, the method comprising the steps of:
a) providing a master cylinder assembly comprising a cylinder, with a piston that reciprocates inside the cylinder against the action of a return spring, and a hydraulic tank having a bottom, a ceiling, and a membrane that divides the tank into a variable volume filled chamber and a complementarily variable volume empty chamber, said hydraulic tank being fluidically connected to the cylinder through at least one main passage in said bottom,
b) providing a metering device for measuring a distance of the membrane from the ceiling of the hydraulic tank,
c) inserting a hydraulic fluid in the master cylinder assembly,
d) reciprocating the piston inside the cylinder,
e) evaluating whether an output signal of the metering device is indicative of a temporary approach of the membrane to the ceiling having an extent corresponding to a predetermined approach range, and,
f) establishing that the master cylinder assembly is correctly operating when the output signal is indicative of a temporary approach of the membrane to the ceiling.