Abstract: When an element of the electro-hydraulic brake circuit (1) is malfunctioning, a master cylinder (2) can brake the vehicle. A brake actuation simulator (8) is then disconnected from the master cylinder (2) by means of an O-ring gasket (22) after the gasket has been compressed between a groove (16) in a secondary piston (11) and a bore (24) in the master cylinder. In order to prevent the gasket from being extruded from the groove during brake release (or brake pedal release) resulting from sudden braking, the invention makes provision for a pressure relief duct (32) to be provided inside the secondary piston. Extra pressure can then be discharged during brake release (or brake pedal release) through the brake release duct (32) from the inside of the chamber (30) of the simulator towards the primary chamber (10) of the master cylinder.

Abstract: A tank intended for an electrohydraulic braking system comprises, according to the present invention, a first chamber (7) for the supply of a primary hydraulic circuit of a master cylinder with brake fluid, a second chamber (9) for the supply of a secondary hydraulic circuit of the master cylinder (not shown) with brake fluid, a third chamber (11) for the supply of a hydraulic pump with brake fluid, and a fourth chamber (13), a measuring one, which accommodates a detection device, indicating when the brake-fluid level inside the tank is too low. The tank has a flow path for the interconnection of the first chamber (7), the second chamber (9) and the third chamber (11) when the hydraulic-fluid level is higher than a safety level, and for the fluid-tight separation of said chambers when the hydraulic-fluid level is lower than the safety level.

Abstract: This master cylinder comprises a body (12) defining a primary pressure chamber (14) and a secondary pressure chamber (16), separated by an axially movable piston (22), the so-called secondary piston; means (28) for the hydraulic connection of the primary pressure chamber (14) with braking-force simulation means (30); and complementary moving and stationary means (32, 34) for the sealing of the hydraulic connection means (28). The moving and stationary sealing means (32, 34) are borne by the secondary piston (22) and the body (12) respectively. The secondary piston (22) is axially movable between a rest position, in which the complementary sealing means (32, 34) are spaced apart from each other, and a position in which said complementary sealing means (32, 34) are cooperating with each other.

Abstract: When an element of the electro-hydraulic brake circuit (1) is malfunctioning, a master cylinder (2) can brake the vehicle. A brake actuation simulator (8) is then disconnected from the master cylinder (2) by means of an O-ring gasket (22) after the gasket has been compressed between a groove (16) in a secondary piston (11) and a bore (24) in the master cylinder. In order to prevent the gasket from being extruded from the groove during brake release (or brake pedal release) resulting from sudden braking, the invention makes provision for a pressure relief duct (32) to be provided inside the secondary piston. Extra pressure can then be discharged during brake release (or brake pedal release) through the brake release duct (32) from the inside of the chamber (30) of the simulator towards the primary chamber (10) of the master cylinder.

Abstract: A tank intended for an electrohydraulic braking system comprises, according to the present invention, a first chamber (7) for the supply of a primary hydraulic circuit of a master cylinder with brake fluid, a second chamber (9) for the supply of a secondary hydraulic circuit of the master cylinder (not shown) with brake fluid, a third chamber (11) for the supply of a hydraulic pump with brake fluid, and a fourth chamber (13), a measuring one, which accommodates a detection device, indicating when the brake-fluid level inside the tank is too low. The tank for the interconnection of the first chamber (7), the second chamber (9) and the third chamber (11) when the hydraulic-fluid level is higher than a safety level and for the fluid-tight separation of said chambers when the hydraulic-fluid level is lower than the safety level.

Abstract: The master cylinder comprises a body (12) defining a primary pressure chamber (14) and a secondary pressure chamber (16), separated by a secondary piston (20); means (24) for the hydraulic connection of the primary pressure chamber (14) with braking-force simulation means (26); moving and stationary means (28, 30) for the sealing of the hydraulic connection means (24) and borne by the secondary piston (20) and the body (12) respectively. The piston (20) is axially movable between a rest position, in which the moving and stationary sealing means (28, 30) are spaced apart from each other, and a position in which said moving and stationary sealing means (28, 30) are cooperating with each other. A moving stop (34) and a stationary stop (32), borne by the secondary piston (20) and the body (12) respectively, cooperate with each other so as to define, the rest position of the secondary piston (20).

Abstract: This master cylinder comprises a body (12) defining a primary pressure chamber (14) and a secondary pressure chamber (16), separated by an axially movable piston (22), the so-called secondary piston; means (28) for the hydraulic connection of the primary pressure chamber (14) with braking-force simulation means (30); and complementary moving and stationary means (32, 34) for the sealing of the hydraulic connection means (28). The moving and stationary sealing means (32, 34) are borne by the secondary piston (22) and the body (12) respectively. The secondary piston (22) is axially movable between a rest position, in which the complementary sealing means (32, 34) are spaced apart from each other, and a position in which said complementary sealing means (32, 34) are cooperating with each other.

Abstract: A hydraulic capacity having a hollow body (2) made of a rubber material and a rigid body (3) which surrounds the hollow body (2) to limit the expansion of the hollow body (2). The hydraulic capacity containing at each instant an instantaneous volume (V) of fluid to which an instantaneous pressure is applied as a function of the instantaneous volume (V). The hollow body (2) has a wall (21) which is simultaneously in contact with the casing (3) and at least via of a first zone (Z1) and a second zone (Z2). The first zone (Z1) has a first thickness (E1) and the second zone (Z2) has a second thickness (E2) which are separated from each other by a third zone (Z3) having a third thickness (E3). The third zone (Z3) being separated from the casing (3) and the third thickness (E3) being different than the first (E1) and second (E2) thickness such that an instantaneous pressure (P) of the fluid is controlled according to a predefined relationship.