Rail vehicle braking system and braking method for a rail vehicle comprising such a system

A rail vehicle braking system having brakes with at least one lining or block, the braking system comprising:

• a first body;
• a braking linkage configured to operate on at least one of said brakes;
• a service brake comprising a braking piston movable relative to said first body to actuate said braking linkage, and delimiting with said first body a service brake pressure chamber configured to be supplied by a first pneumatic pressure agent to place said braking piston in a service braking position;
• a parking brake configured to actuate said braking piston of said service brake and having a working configuration and a resting configuration,
• said parking brake comprising a blocking device movable relative to said first body to actuate said braking piston, said blocking device movable between a first position and a second position,
• the blocking device, when said parking brake is in the working configuration, being in said second position wherein said blocking device immobilizes said braking piston in the service braking position thereof;
• a control device movable relative to said first body and having a locking position in which said control device holds said blocking device in the second position thereof;
• a second pneumatic pressure agent configured to supply the service brake pressure chamber so as to apply a determined braking force when said parking brake is in the working configuration thereof;
• and
• a detection and memorization device, configured to determine and memorize, from a detected position of the blocking device and from a detected supply of the service brake pressure chamber from the second pneumatic pressure agent, whether the parking brake is applied, wherein a memorization of application of the parking brake is maintained by the detection and memorization device even if the service brake pressure chamber is no longer supplied by the second pneumatic pressure agent.