Pressure control device, brake system, and control method

Abstract

The invention relates to a pressure control device (1) for a brake system (100), comprising a device body (4) which partially delimits at least a first circuit-side opening (9), at least a second circuit-side opening (61) and at least one duct (8), at least one of the conduits (8) comprises at least a first conduit portion (12) and at least a second conduit portion (13), the first conduit portion (12) being fluidically connectable to the first circuit (2), the second conduit portion (13) being fluidically connectable to the second circuit (2), and the first conduit portion (13) being fluidically connectable to the second circuit (2). A second conduit portion (13) fluidly connectable to the first circuit (3) to receive a first circuit fluid at a first circuit pressure (P1) and wherein the second conduit portion (13) is fluidly connectable to the second circuit (3) to receive a second circuit fluid at a second circuit pressure (P2); a pressure control mechanism (5) configured to control a first circuit pressure (P1) and / or a second circuit pressure (P2) to reach an actuation pressure (Pa), where the pressure control mechanism (5) is at least partially housed in the conduit (8), where when at least one of the first circuit pressure (P1) and the second circuit pressure (P2) is below a threshold pressure (Ps), the pressure control mechanism (5) is configured to control the first circuit pressure (P1) and / or the second circuit pressure (P2) to reach the actuation pressure (Pa). The pressure control mechanism (5) is configured to prevent passage of fluid between the first conduit portion (12) and the second conduit portion (13), and vice versa, to maintain at least one of the first circuit pressure (P1) and the second circuit pressure (P2) higher than the threshold pressure (P2) to reach the actuation pressure (Pa), and to maintain at least one of the first circuit pressure (P1) and the second circuit pressure (P2) higher than the threshold pressure (P2) to reach the actuation pressure (Pa). The pressure control mechanism (5) is configured to fluidly connect the first conduit portion (12) and the second conduit portion (13) when both the first circuit pressure (P1) and the second circuit pressure (P2) are higher than a threshold pressure (Ps), thereby actuating the first brake device (101) or the second brake device (102), and to fluidly connect the first conduit portion (12) and the second conduit portion (13) when both the first circuit pressure (P1) and the second circuit pressure (P2) are higher than the threshold pressure (Ps). The first circuit pressure (P1) and the second circuit pressure (P2) are aligned with the threshold pressure (Pa) in order to actuate the first brake device (101) and the second brake device (102) with the actuation pressure (Pa).

Description

Technical Field

[0001] The invention relates to a pressure control device for a brake system, a brake system and a method for controlling an actuation pressure of a brake system.

[0002] The text and drawings of Italian patent applications 102022000009182 and 102022000009176 from which this patent application claims priority are incorporated in their entirety into the present patent application. Background Art

[0003] Braking systems are known in which two braking devices are associated with one wheel, such as, for example, two brake calipers and corresponding two brake discs connected to opposite sides of the wheel. Such solutions are used, for example, on motorcycles to brake the front wheel.

[0004] In such a system, the two brake devices are hydraulically connected to the same pressure chamber of the actuating device, wherein the brake fluid pressurized in the pressure chamber actuates both brake devices, i.e. each hydraulic actuator of the brake devices, with the same pressure. In other words, in such a system there is only one brake circuit which actuates at least two brake devices connected in parallel. Thus, with these solutions, the actuation conditions of the two brake devices are identical, since both brake devices are directly fluidically connected to the same pressure chamber. Thus, these solutions allow obtaining a substantially identical braking action and wear behavior of the two brake devices.

[0005] Although these solutions make it possible to actuate both brake devices with the same pressure, thus ensuring consistent braking action on both sides of the wheel and consistent wear of the two brake devices, any hydraulic leakage will result in a loss of pressure in the entire system, which may impede the operation of the system and therefore prevent the user from braking the wheel acted upon by the system, seriously reducing driving safety in the event of a malfunction.

[0006] Therefore, a strong need is felt in the industry to produce a braking system involving the actuation of two braking devices per individual wheel, in which an increased safety of use is ensured.

[0007] Furthermore, there is a strong need in the industry to manufacture a braking system in which impairment of the use of one of the two braking devices does not affect the operation of the other braking device, while at the same time in which the conflicting requirements of keeping the actuation conditions of the two braking devices as consistent as possible under normal use conditions of the two braking devices are met. Summary of the invention

[0008] The object of the present invention is to provide a pressure control device for a braking system, which allows at least two braking devices to be actuated with the same actuating pressure during normal operation of the at least two braking devices, and which allows one braking device to be actuated with the actuating pressure without considering the failure of the other braking device, thereby on the one hand reducing the wear variation of the braking device by preventing the pressure conditions from changing when the braking device is actuated, and on the other hand improving the safety of the braking system when the braking device cannot be actuated.

[0009] These and other objects and advantages are achieved by the pressure control device according to claim 1 , the brake system according to claim 12 , and the pressure control method according to claim 14 .

[0010] Advantageous embodiments are the subject matter of the dependent claims.

[0011] By means of the proposed solution, an automatic control of the actuating pressures of the first brake actuating device and of the second brake actuating device can be ensured.

[0012] By means of the proposed solution, the pressure of a first circuit connected to a first brake actuator and a second circuit connected to a second brake actuator can be balanced and made consistent, thereby allowing a fluid connection between the two circuits when both circuits are at a pressure above a threshold pressure.

[0013] By means of the proposed solution, a mechanical pressure control device can be provided which is small in size and low in cost.

[0014] By means of the proposed solution, the need to ensure the operation of the first brake actuator without regard to the operation of the second brake actuator, and at the same time the additional conflicting need to ensure the consistency of the actuation conditions of the first brake actuator and the second brake actuator, can be responded to in the following way: the first brake actuator and the second brake actuator are fluidly separated from each other as long as at least one of the first circuit pressure and the second circuit pressure is below a threshold pressure, and the first brake actuator and the second brake actuator are only put into fluid communication when both the first circuit pressure and the second circuit pressure exceed the threshold pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Further features and advantages of the pressure control device, the brake system and the control method will become apparent from the following description of preferred embodiments of the pressure control device, the brake system and the control method given by way of non-limiting indication with reference to the accompanying drawings, in which:

[0016] - Figure 1A braking system of known type is schematically shown, in which the same actuating device controls simultaneously a first braking device and a second braking device, for example a first brake caliper and a second brake caliper, by means of a double-branched separate line, thereby forming a single braking circuit in which, if a fault occurs in one of the two branches and / or in one of the two braking devices, the operation of the entire circuit is impaired;

[0017] - Figure 2 A braking system according to the invention is schematically shown, in which the same actuation device controls a first braking device and a second braking device in parallel and independently by means of two independent pressure chambers, thereby forming a first circuit and a second circuit, the first braking device and the second braking device being, for example, a first brake caliper and a second brake caliper associated with the same wheel of a vehicle, wherein a pressure control device according to the invention is connected in parallel to the first circuit and the second circuit in such a way that: when at least one of the first circuit pressure and the second circuit pressure is below a threshold pressure, the two circuits are kept fluidly separated, thereby allowing actuation of the first braking device or the second braking device regardless of a fault in the second circuit or the first circuit, and the two circuits are fluidly connected only when both the first circuit pressure and the second circuit pressure are above a threshold pressure, thereby allowing actuation of the first braking device and the second braking device at the same pressure;

[0018] - Figure 3a to Figure 3d The operation of the pressure control device according to an embodiment of the present invention is schematically shown, wherein: Figure 3a The pressure-actuated device is shown when the load-carrying brake system is at rest and the first circuit fluid and the second circuit fluid are not under pressure, wherein the pressure control mechanism is in a fully closed configuration; wherein, Figure 3b showing a pressure actuated device that communicates a first circuit fluid and a second circuit fluid when both the first circuit pressure and the second circuit pressure are above a threshold pressure, wherein the pressure control mechanism is in a fully open configuration; Figure 3c The pressure control device is shown when a fault occurs in the second circuit, wherein the first circuit pressure is above a threshold pressure and the second circuit pressure is below the threshold pressure, wherein the pressure control mechanism is in a first closed configuration; Figure 3d The pressure control device is shown when a fault occurs in the first circuit, wherein the second circuit pressure is above a threshold pressure and the first circuit pressure is below the threshold pressure, wherein the pressure control mechanism is in a second closed configuration;

[0019] - Figure 4 shows an isometric view of a pressure control device according to an embodiment of the present invention, wherein a first side and an upper portion of a body of the pressure control device can be seen;

[0020] - Figure 5 Shows Figure 4 an isometric view of a pressure control device in which a lower portion of a body of the pressure control device and a second side opposite the first side can be seen;

[0021] - Figure 6 Shows Figure 4 and Figure 5 An exploded isometric view of the pressure control device in , wherein a body of the device is shown, which accommodates the pressure control mechanism and is configured to be connected to the first circuit and the second circuit by means of corresponding connecting parts;

[0022] - Figure 7 From Figure 5 The opposite perspective shows Figure 6 Axonometric view of the control device in;

[0023] - Figure 8 Shows a cross section along plane AA Figure 4 sectional view of the control device in FIG. 1 , wherein a pressure control mechanism accommodated inside the device body can be seen, wherein the first piston and the second piston form a seal with a corresponding seat accommodating the first piston and the second piston by means of a corresponding polymer gasket and a corresponding piston surface, the corresponding polymer gasket being fitted to the body of the corresponding piston to form a dynamic and static seal with the wall of the corresponding seat, the corresponding piston surface being adapted to form a geometrically structured static seal against the surface of the corresponding seat;

[0024] - Fig. 9 Shows a cross section along plane AA Figure 4 A sectional view of the device in FIG. 1 , in which a pressure control mechanism housed inside the device body can also be seen, wherein the first piston and the second piston form a seal with the corresponding seating portions that accommodate the first piston and the second piston by means of corresponding polymer gaskets and a second polymer gasket, the corresponding polymer gasket is fitted to the body of the corresponding first piston to form a dynamic and static seal with the wall of the corresponding seating portion, and the second polymer gasket is inserted into an axial seating portion made on the head of the corresponding piston to form a static seal against the corresponding surface of the seating portion. DETAILED DESCRIPTION

[0025] According to a general embodiment, a pressure control device of a brake system 100 is denoted by reference numeral 1 .

[0026] The pressure control device 1 comprises a device body 4, which partially defines at least a first circuit side opening 9, at least a second circuit side opening 61, and at least one conduit 8, and the at least one conduit 8 enables fluid communication between the at least first circuit side opening 9 and the at least second circuit side opening 61. The at least one conduit 8 comprises at least a first conduit portion 12 and at least a second conduit portion 13. According to an embodiment, the at least first circuit side opening 9 and the at least second circuit side opening 61 are arranged on opposite sides of the device body 4.

[0027] The first conduit portion 12 can be fluidly connected to the first circuit 2 to receive the first circuit fluid.

[0028] The second pipe portion 13 can be fluidly connected to the second circuit 3 to receive the second circuit fluid.

[0029] The first circuit 2 includes a first pressure chamber of a brake actuating device 103 to pressurize a first circuit fluid at a first circuit pressure P1 , wherein the first pressure chamber is fluidly connected to a first brake actuating device 101 to brake wheels of a vehicle.

[0030] The second circuit 3 includes a second pressure chamber of the brake actuating device 103 to pressurize the second circuit fluid at a second circuit pressure P2, wherein the second pressure chamber is fluidly connected to the second brake actuating device 102 to brake the wheels of the vehicle.

[0031] The pressure control device 1 includes a pressure control mechanism 5 configured to control the first circuit pressure P1 and / or the second circuit pressure P2 to reach an actuation pressure Pa.

[0032] The pressure control mechanism 5 is at least partially accommodated in the duct 8 .

[0033] Advantageously, when at least one of the first circuit pressure P1 and the second circuit pressure P2 is lower than a threshold pressure Ps, the pressure control mechanism 5 is configured to: block the passage of fluid between the first pipe portion 12 and the second pipe portion 13, or block the passage of fluid between the second pipe portion 13 and the first pipe portion 12, so as to maintain at least one of the first circuit pressure P1 and the second circuit pressure P2, which is higher than the threshold pressure Ps, to the actuation pressure Pa, so as to actuate the first braking device 101 or the second braking device 102.

[0034] Advantageously, when both the first circuit pressure P1 and the second circuit pressure P2 are higher than the threshold pressure Ps, the pressure control mechanism 5 is configured to fluidly connect the first pipe portion 12 and the second pipe portion 13 so that the first circuit pressure P1 and the second circuit pressure P2 are consistent with the actuating pressure Pa, thereby actuating the first braking device 101 and the second braking device 102 with the actuating pressure Pa.

[0035] With the aid of this pressure control device 1, the first circuit and the second circuit can be automatically, mechanically, and fluidically connected and isolated in a reversible manner, so that: under normal use conditions where a circuit pressure sufficient to actuate the corresponding braking device can be reached in each of the two circuits, the first circuit and the second circuit are fluidly connected to work at the same pressure, as if the first circuit and the second circuit were one circuit; and in the event of a failure in either circuit, that is, if the circuit pressure is insufficient to operate one of the two circuits and one of the two braking devices, the first circuit and the second circuit are separated, thereby preventing the fluid from passing between the two circuits to keep the two circuits isolated, so that one of the two circuits is pressurized without considering the failure in the other circuit.

[0036] By means of the pressure control mechanism 5, when there is no failure in the first circuit 2 or the second circuit 3, the pressure difference that may occur when the first circuit 2 and the second circuit 3 are separated from each other can be avoided by making the first circuit 2 and the second circuit 3 fluidly connected, so as to allow the pressure conditions in the first circuit 2 and the second circuit 3 to be consistent, thereby actuating the first brake actuator 101 and the second brake actuator 102 with the same actuation pressure Pa. Therefore, the wear state and brake actuation condition of the first brake actuator 101 and the second brake actuator 102 acting on opposite sides of the same wheel of the vehicle can be made consistent.

[0037] With the help of the pressure control mechanism 5, the two circuits can be fluidly separated, thereby avoiding damage to the brake system in the event of a failure in one of the first circuit 2 and the second circuit 3, such as fluid leakage, which usually occurs in the brake system of the prior art in which the two circuits 2 and 3 are in fluid communication.

[0038] By means of the proposed solution, the pressure control mechanism 5 is configured to allow the fluid in the working circuits 2 , 3 to reach the actuation pressure Pa, regardless of the occurrence of a malfunction in one of the two circuits 2 , 3 .

[0039] According to an embodiment, the pressure control mechanism 5 is configured to detect the first pressure P1 and the second pressure P2, preferably mechanically by means of at least one elastic device.

[0040] According to an embodiment, said conduit 8 comprises a third conduit portion 14 adapted to fluidly connect said at least first conduit portion 12 with said at least second conduit portion 13 .

[0041] According to an embodiment, the pressure control mechanism 5 is configured to: when the first pipeline pressure P1 is higher than the threshold pressure Ps and the second pipeline pressure P2 is lower than the threshold pressure Ps, the first pipeline portion 12 is fluidically connected to the third pipeline portion 14, and the passage of fluid from the third pipeline portion 14 to the second pipeline portion 13 is blocked to maintain the first circuit pressure P1, thereby actuating the first braking device 101 with the actuating pressure Pa.

[0042] According to an embodiment, the pressure control mechanism 5 is configured to: when the second pipeline pressure P2 is higher than the threshold pressure Ps and the first pipeline pressure P1 is lower than the threshold pressure Ps, the second pipeline portion 13 is fluidly connected to the third pipeline portion 14, and the passage of fluid from the third pipeline portion 14 to the first pipeline portion 12 is blocked to maintain the second circuit pressure P2, thereby actuating the second braking device 102 with the actuating pressure Pa.

[0043] According to an embodiment, said pressure regulating mechanism 5 comprises a first valve 10 at least partially housed in said first conduit portion 12 .

[0044] According to an embodiment, said pressure regulating mechanism 5 comprises a second valve 11 at least partially housed in said second conduit portion 13 .

[0045] According to an embodiment, the third conduit portion 14 extends between a first valve-side opening 18 in fluid communication with the first conduit portion 12 and a second valve-side opening 20 in fluid communication with the second conduit portion.

[0046] According to an embodiment, the first valve 10 is configured to reversibly open and fluid-tightly close the first valve-side opening 18 .

[0047] According to an embodiment, when the first circuit pressure P1 is lower than the threshold pressure Ps, the first valve 10 closes the first valve side opening 18, thereby preventing the fluid from passing from the first pipe portion 12 to the third pipe portion 14, or preventing the fluid from passing from the third pipe portion 14 to the first pipe portion 12.

[0048] According to an embodiment, when the first circuit pressure P1 is higher than or equal to the threshold pressure Ps, the first valve 10 opens the first valve side opening 18 by fluidly connecting the first pipe portion 12 to the third pipe portion 14 or fluidly connecting the third pipe portion 14 to the first pipe portion 12 .

[0049] According to an embodiment, the second valve 11 is configured to reversibly open and fluid-tightly close the second valve-side opening 20 .

[0050] According to an embodiment, when the second circuit pressure P2 is lower than the threshold pressure Ps, the second valve 11 closes the second valve side opening 20, thereby blocking the passage of fluid from the second pipe portion 12 to the third pipe portion 14, or blocking the passage of fluid from the third pipe portion 14 to the second pipe portion 12.

[0051] According to an embodiment, when the second circuit pressure P2 is greater than or equal to the threshold pressure Ps, the second valve 11 opens the second valve side opening 20 by fluidly connecting the second pipe portion 12 to the third pipe portion 14 or by fluidly connecting the third pipe portion 14 to the second pipe portion 12 .

[0052] According to an embodiment, said threshold pressure Ps is between 1 and 10 bars, preferably between 1 and 4 bars, even more preferably between 1 and 3 bars.

[0053] According to an embodiment, the pressure control device 1 comprises a first connection portion 6 to fluidically connect the first pipe portion 12 to the first circuit 2 .

[0054] According to an embodiment, the pressure control device 1 comprises a first connection portion 6 to fluidically connect the first pipe portion 12 to the first circuit 2 .

[0055] According to an embodiment, the pressure control device 1 comprises a second connection portion 7 to connect the second pipe portion 13 to the second circuit 3 .

[0056] According to a first embodiment, the first valve 10 comprises a first piston or first shutter element 21 housed in a first valve seat 15 which is delimited by the device body 4 and which at least partially comprises the first duct portion 12 .

[0057] According to an embodiment, the first piston 21 is reversibly movable in the first valve seat 15 relative to the device body 4 between a first conduit closing configuration and at least a first conduit opening configuration. According to an embodiment, the first piston 21 is continuously and / or elastically biased to the first conduit closing configuration to allow opening of the first valve only when the first circuit pressure P1 reaches and / or exceeds a threshold pressure Ps.

[0058] According to an embodiment, in the first conduit closing configuration, when the first circuit pressure P1 is below a threshold pressure Ps, the first piston 21 forms a seal with the first wall 26 of the first valve seat 15 , thereby preventing fluid passage from the first connection portion 6 to the third conduit portion 14 .

[0059] According to an embodiment, in at least the first pipeline open configuration, when the first circuit pressure P1 is at least equal to or higher than the threshold pressure Ps, the first piston 21 is spaced apart from the first wall 26 and / or avoids forming a seal with the first wall 26, thereby allowing a fluid connection between the first connection part 6 and the third pipeline part 14. According to an embodiment, in at least the first pipeline open configuration, the first piston 21 and the device body 4 define a first fluid channel, which skims at least one head portion of the first piston 21, thereby allowing a fluid to pass from the first connection part 6 to the third pipeline part 14, or allowing a fluid to pass from the third pipeline part 14 to the first connection part 6. According to an embodiment, the maximum stroke that the first piston 21 can move is between 0.2 mm and 0.8 mm, preferably between 0.2 mm and 0.4 mm.

[0060] According to a second embodiment, the second valve 11 comprises a second piston or a second shutter element 23 housed in a second piston seat 16 which is delimited by the device body 4 and at least partially comprises the second duct portion 13 .

[0061] According to an embodiment, the second piston 23 is reversibly movable in the second valve seat 16 relative to the device body 4 between a second conduit closing configuration and at least a second conduit opening configuration. According to an embodiment, the second piston 23 is continuously and / or elastically biased to the second conduit closing configuration to allow the second valve to be opened only when the second circuit pressure P2 reaches and / or exceeds a threshold pressure Ps. According to an embodiment, the maximum stroke that the second piston 23 can move is between 0.2 mm and 0.8 mm, preferably between 0.2 mm and 0.4 mm.

[0062] According to an embodiment, in the second pipeline closing configuration, when the second circuit pressure P2 is lower than the threshold pressure Ps, the second piston 23 forms a seal with the second wall 28 of the second valve seat 16, thereby preventing the fluid from passing from the second connecting portion 7 to the third pipeline portion 14, or preventing the fluid from passing from the third pipeline portion 14 to the second connecting portion 7.

[0063] According to an embodiment, in at least the second pipeline closed configuration, when the second circuit pressure P2 is at least equal to or higher than the threshold pressure Ps, the second piston 23 is spaced apart from the second wall 28 and / or avoids forming a seal with the second wall 28, thereby allowing a fluid connection from the first connection part 7 to the third pipeline part 14. According to an embodiment, in at least the second pipeline open configuration, the second piston 23 and the device body 4 define a second fluid channel, which at least partially passes over the head portion of the second piston 23, thereby allowing a fluid connection from the first connection part 7 to the third pipeline part 14, or allowing a fluid connection from the third pipeline part 14 to the first connection part 7.

[0064] According to an embodiment, the first valve 10 and the second valve 11 are one-way valves. According to an embodiment, the first valve 10 and the second valve 11 are driven only from one direction and are configured to form a seal in two directions. According to an embodiment, the first valve 10 and the second valve 11 are switched from a corresponding closed configuration to a corresponding open configuration only when the first circuit pressure P1 and the second circuit pressure P2 exceed the threshold pressure Ps respectively. According to an embodiment, the first circuit pressure P1 does not affect the actuation of the second piston 23, and the second circuit pressure P2 does not affect the actuation of the first piston 21, because the second piston 23 has no effective area for the pressure of the first fluid to act on to move the second piston, and the first piston 21 has no effective area for the pressure of the second fluid to act on to move the first piston 21.

[0065] According to an embodiment, the first valve seat 15 extends along the longitudinal direction XX of the first valve. According to an embodiment, the second valve seat 16 extends along the longitudinal direction X'-X' of the second valve. According to an embodiment, the third pipe portion 14 is engaged in the first valve seat 15 according to a first engagement direction YY, which is inclined (incident) and / or transverse to the longitudinal direction XX of the first valve. According to an embodiment, the third pipe portion 14 is engaged in the second valve seat 16 according to a second engagement direction Y'-Y', which is inclined and / or transverse to the longitudinal direction X'-X' of the second valve. According to an embodiment, the longitudinal direction XX of the first valve and the longitudinal direction X'-X' of the second valve are parallel and / or coincident. According to an embodiment, the longitudinal direction XX of the first valve and the longitudinal direction X'-X' of the second valve are linear. According to an embodiment, the longitudinal direction XX of the first valve and the longitudinal direction X'-X' of the second valve define a seating axis around which a wall of the device body delimiting the respective valve seating extends. According to an embodiment, the third duct portion 14 extends in a direction parallel to the longitudinal direction XX of the first valve and the longitudinal direction X'-X' of the second valve.

[0066] According to an embodiment, the first valve 10 comprises a first elastic element 22 accommodated in the first valve seat 15 .

[0067] According to an embodiment, the first elastic element 22 is placed between the first piston 21 and the device body 4 along the longitudinal direction XX of the first valve, and preferably between the first piston 21 and the first bottom wall 25 of the first valve seat 15 along the longitudinal direction XX of the first valve, so as to continuously bias the first piston 21 toward the first pipeline closing configuration.

[0068] According to an embodiment, the first elastic element 22 is dimensioned such that, when the first circuit pressure P1 is below a threshold pressure Ps, the first piston is in the first duct closing configuration.

[0069] According to an embodiment, the second valve 11 comprises a second elastic element 24 housed in the second valve seat 16 .

[0070] According to an embodiment, the second elastic element 24 is placed between the second piston 23 and the device body 4 along the longitudinal direction X'-X' of the second valve, and preferably between the second piston 23 and the second bottom wall 26 of the second valve seat 16 along the longitudinal direction X'-X' of the second valve, so as to continuously bias the piston 23 toward the second pipeline closing configuration.

[0071] According to an embodiment, the second elastic element 24 is dimensioned such that, when the second circuit pressure P2 is below a threshold pressure Ps, the first piston is in the second duct closing configuration.

[0072] According to an embodiment, the first piston 21 comprises a first gasket 31 of the first piston, wherein the first gasket 31 of the first piston is configured to form a seal with a first sliding wall 32 of the first valve seat 15 at any position of the first piston 21 between the at least first conduit opening configuration and the first conduit closing configuration. According to an embodiment, the first gasket 31 of the first piston is configured to isolate the first elastic element 22 from the third conduit portion 14 and / or from the first circuit 2 fluid.

[0073] According to an embodiment, the second piston 23 comprises a first gasket 36 of the second piston, wherein the first gasket 36 of the second piston is configured to form a seal with a sliding wall 37 of the second valve seat 16 at any position of the second piston 23 between the at least second conduit opening configuration and the second conduit closing configuration. According to an embodiment, the first gasket 36 of the second piston is configured to isolate the second elastic element 24 from the third conduit portion 14 and / or the second circuit 3 fluid.

[0074] According to an embodiment, the first gasket 31 of the first piston is a low friction annular gasket fitted to a first groove made on the piston body of the first piston 21. According to an embodiment, the first gasket 31 of the first piston and / or the first gasket 36 of the second piston are made of a polymer material compatible with brake fluid.

[0075] According to an embodiment, the first gasket 31 of the first piston and / or the first gasket 36 of the second piston is a gasket having, for example, a V-shaped profile or an O-ring.

[0076] According to an embodiment, the first gasket 36 of the second piston is a second low-friction annular gasket fitted into a second groove made on the piston body of the second piston 23 .

[0077] According to an embodiment, the first piston 21 comprises a second gasket 33 of the first piston, the second gasket 33 of the first piston being configured to form a seal with the first wall 26 when the first piston 21 is in the first conduit closing configuration.

[0078] According to an embodiment, when the first piston 21 is in the first conduit-opening configuration, the second gasket 33 of the first piston is spaced apart from the first wall 26 , thereby opening the first fluid channel.

[0079] According to an embodiment, the second piston 23 comprises a second gasket 38 of the second piston configured to form a seal with the second wall 28 when the second piston 23 is in the second conduit closing configuration.

[0080] According to an embodiment, when the second piston 38 is in the second conduit-opening configuration, the second gasket 38 of the second piston is spaced apart from the second wall 28 , thereby opening the second fluid passage.

[0081] According to an embodiment, the second gasket 33 of the first piston is an annular gasket adapted to be fitted onto the first piston body. According to an embodiment, the second gasket 38 of the second piston is a gasket adapted to be fitted onto the second piston body of the second piston 38 .

[0082] According to an embodiment, the second gasket 33 of the first piston and the second gasket 39 of the second piston are annular O-rings or V-rings housed in respective annular seats of the respective pistons 21, 23. According to an embodiment, the second gasket 33 of the first piston and / or the second gasket 39 of the second piston are made of a polymer material compatible with the brake fluid.

[0083] According to an embodiment, the first piston 21 comprises a first piston head 34 .

[0084] According to an embodiment, the second gasket 33 of the first piston is an annular gasket adapted to be inserted into a corresponding axial annular seat made as a groove accessible from a direction parallel to the longitudinal direction XX of the first seat on the first piston head 34. Therefore, the second gasket 33 of the first piston is configured to abut axially against the first wall 26 to form a seal.

[0085] According to an embodiment, the first piston head 34 comprises a first sealing surface 35, which is suitable for forming a geometric seal by abutting against the first wall 26. According to an embodiment, the second gasket 33 of the first piston is the first sealing surface 35. According to an embodiment, the second gasket 33 of the first piston is a metal surface of the body of the first piston.

[0086] According to an embodiment, the first wall 26 and the first sealing surface 35 have a surface roughness such that the first wall 26 and the first sealing surface 35 form a hydraulic seal when abutting against each other.

[0087] According to an embodiment, the second piston 23 comprises a second piston head 39 .

[0088] According to an embodiment, the second gasket 38 of the second piston is an annular gasket adapted to be inserted into a corresponding axial seat made as a groove accessible from a direction parallel to the longitudinal direction X'-X' of the second seat on the second piston head 39. Therefore, the second gasket 38 of the second piston is configured to abut axially against the second wall 28 to form a seal.

[0089] According to an embodiment, the second piston head 39 comprises a second sealing surface 40 adapted to form a geometric seal by abutting against the second wall 28. According to an embodiment, the second gasket 38 of the second piston is the second sealing surface 40. According to an embodiment, the second gasket 38 of the second piston is a metal surface of the body of the second piston.

[0090] According to an embodiment, the second wall 28 and the second sealing surface 40 have a surface roughness such that the second wall 28 and the second sealing surface 40 form a hydraulic seal when abutting against each other.

[0091] According to an embodiment, the first sealing surface 35 forms an annular geometric seal with the first wall 26 , and the second sealing surface 40 forms an annular geometric seal with the second wall 28 .

[0092] According to an embodiment, the first sealing surface 35 belongs to the first tapered surface of the first piston head 34 .

[0093] According to an embodiment, the second sealing surface 40 belongs to the second tapered surface of the second piston head 39 .

[0094] According to an embodiment, the respective piston head of each piston is wedged into the first wall 26 or the second wall 28 , wherein a respective annular gasket is interposed between the respective piston head and the first wall 26 or the second wall 28 .

[0095] According to an embodiment, the first wall 26 delimits a portion of the first valve seat 15 , preferably a first circuit-side portion of the first conduit portion 12 , laterally and radially with respect to the longitudinal direction XX of the first seat.

[0096] According to an embodiment, the first wall 26 axially delimits a portion of the first valve seat 15 orthogonally with respect to the longitudinal direction XX of the first seat, preferably axially delimits a first circuit-side portion of the first conduit portion 12. According to an embodiment, the first wall 26 is a circular crown orthogonal to the longitudinal direction XX of the first seat.

[0097] According to an embodiment, the first wall 26 is a connecting wall between two sections of the first duct portion 12 , thereby forming a first cross-sectional narrowing of the first duct portion 12 .

[0098] According to an embodiment, the second wall 28 delimits laterally a portion of the second valve seat 15 , preferably a second circuit-side portion of the second conduit portion 13 , radially with respect to the longitudinal direction X′-X′ of the second seat.

[0099] According to an embodiment, the second wall 28 axially delimits a portion of the second valve seat 15 orthogonally with respect to the longitudinal direction X'-X' of the second seat, preferably axially delimits a second circuit-side portion of the second conduit portion 13. According to an embodiment, the second wall 28 is a circular crown orthogonal to the longitudinal direction X'-X' of the second seat.

[0100] According to an embodiment, the first wall 26 and the second wall 28 are tapered surfaces whose tapering angles are greater than those of the first sealing surface 35 and the second sealing surface 40 relative to the longitudinal extension direction XX, X′-X′ of the corresponding valve seat.

[0101] According to an embodiment, the second sealing surface 40 and the second wall 28 , the first sealing surface 35 and the first wall 26 are all tapered surfaces.

[0102] According to an embodiment, the second wall 28 is a connecting wall between two sections of the second duct portion 13 , thereby forming a second cross-sectional narrowing of the second duct portion 13 .

[0103] According to an embodiment, the second gasket 33 of the first piston and the first gasket 31 of the first piston have the same sealing diameter D. According to an embodiment, the second gasket 38 of the second piston and the first gasket 36 of the second piston have the same sealing diameter D.

[0104] A cross-sectional narrowing is understood to be a radial narrowing of the pipeline which is located in the longitudinal direction of the pipeline and / or of the valve seat.

[0105] According to an embodiment, the first connection portion 6 and the first wall 26 partially delimit the first duct portion 12. According to an embodiment, the second connection portion 7 and the second wall 28 partially delimit the second duct portion 13.

[0106] According to an embodiment, the pressure regulating mechanism 5 comprises a first reinforcement 41 in which the first elastic element 22 is accommodated, wherein the first reinforcement 41 forms a first bottom of the first valve seat 15. According to an embodiment, the pressure regulating mechanism 5 comprises a first transmission element 42.

[0107] According to an embodiment, the first elastic element 22 is connected to the first piston 21 by means of the first transmission element 42 .

[0108] According to an embodiment, the first transmission element 42 is adapted to receive the first piston engagement portion 43 to be connected to the first piston 21 by a positive coupling and / or by interference and / or by interlocking / engaging.

[0109] According to an embodiment, the first transmission element 42 is adapted to abut against a first piston thrust portion 44 .

[0110] According to an embodiment, the pressure regulating mechanism 5 comprises a second reinforcement 45 in which the second elastic element 24 is accommodated, wherein the first reinforcement 45 forms a second bottom of the second valve seat 16 .

[0111] According to an embodiment, the pressure regulating mechanism 5 comprises a second transmission element 46 .

[0112] According to an embodiment, the second elastic element 24 is connected to the second piston 23 by means of the second transmission element 46 .

[0113] According to an embodiment, the second transmission element 46 is adapted to receive the second piston engagement portion 47 to be connected to the second piston 23 by form-fit coupling and / or by interference and / or by interlocking / engaging.

[0114] According to an embodiment, the second transmission element 46 is adapted to abut against a second piston thrust portion 48 .

[0115] According to an embodiment, the first elastic element 22 and the second elastic element 24 include a first spring and a second spring, respectively.

[0116] According to an embodiment, the first spring and the second spring are wire springs.

[0117] According to an embodiment, the wire spring is dimensioned so as to allow the respective piston 21 , 23 to retract when the respective pressure P1 , P2 exerted by the respective fluid on the surface of the piston head facing the first or second circuit is higher than a threshold pressure Ps1 .

[0118] According to an embodiment, the first transmission element 42 and the second transmission element 46 respectively have a first T-shaped body and a second T-shaped body, the first T-shaped body and the second T-shaped body having a T-shaped cross section and having a longitudinal through hole.

[0119] According to an embodiment, the first T-shaped body and / or the first transmission element 42 has a first elongated shaft and a first enlarged head.

[0120] According to an embodiment, the first elongated rod is housed within a turn of a first spring, wherein an end turn of the first spring abuts against an outer first head surface of said first enlarged head.

[0121] According to an embodiment, the first elongated rod internally defines a first engagement seat to engage with the first piston engagement portion 43 by interference and / or by form fit coupling and / or by engagement. According to an embodiment, the first piston thrust portion 44 abuts against an inner first head surface of the first enlarged head.

[0122] According to an embodiment, the second T-shaped body and / or the second transmission element 46 has a second elongated rod and a second enlarged head.

[0123] According to an embodiment, the second elongated rod is housed within the turns of the second spring, wherein the end turns of the second spring abut against the outer second head surface of the second enlarged head.

[0124] According to an embodiment, the second elongated rod internally defines a second engagement seat to engage with the second piston engagement portion 47 by interference and / or by form-fit coupling and / or by engagement.

[0125] According to an embodiment, the second piston thrust portion 48 abuts against an inner second head surface of the second enlarged head.

[0126] According to an embodiment, the first and second springs are fixed to the first and second bottom walls 25 and 27 , respectively.

[0127] According to an embodiment, the first transmission element 42 is configured such that when the first piston 21 is in the first pipeline opening configuration, the first transmission element 42 abuts against a corresponding abutment portion of the first reinforcement member 41, thereby limiting the maximum stroke that the first piston can move between the first pipeline closing configuration and the first pipeline opening configuration.

[0128] According to an embodiment, the outer first head surface of the first enlarged head of the first transmission element 41 is configured to abut against the abutment portion of the first reinforcement 41 when the first piston 21 is in the first pipeline opening configuration. According to an embodiment, when the first piston 21 is in the first pipeline closing configuration, the distance between the outer first head surface of the first enlarged head of the first transmission element 41 and the abutment portion of the first reinforcement 41 is equal to the maximum stroke of the first piston.

[0129] According to an embodiment, the second transmission element 46 is configured such that when the second piston 23 is in the second pipeline opening configuration, the second transmission element 46 abuts against the corresponding abutment portion of the second reinforcement 45, thereby limiting the maximum stroke that the first piston can move between the second pipeline closing configuration and the second pipeline opening configuration.

[0130] According to an embodiment, the outer second head surface of the second enlarged head of the second transmission element is configured to abut against a corresponding abutment portion of the second reinforcement 45 when the second piston 23 is in the second pipe opening configuration. According to an embodiment, when the second piston 23 is in the second pipe closing configuration, the distance between the outer second head surface of the second enlarged head of the second transmission element and the abutment portion of the second reinforcement 45 is equal to the maximum stroke of the second piston.

[0131] According to an embodiment, the first valve seating 15 at least partially comprises the first duct portion 12 and a first bottom portion 17. According to an embodiment, the first bottom wall 25 separates the first valve seating 15 from the second valve seating 16. According to an embodiment, the first bottom portion 17 comprises the first bottom wall 25. According to an embodiment, the first bottom wall 25 comprises at least a first bottom opening in fluid communication with the external environment without compressing air or fluid in the first bottom portion 17.

[0132] According to an embodiment, the third conduit portion 14 leads to the first valve seat 15 through the first valve side opening 18. According to an embodiment, the first valve side opening 18 is defined on a first side wall 29 of the first conduit portion 12.

[0133] According to an embodiment, at least a portion of the first valve seating 15 can be fluidly connected with at least a portion of the second valve seating 16 by means of the third conduit portion 14 .

[0134] According to an embodiment, the second valve seat 16 at least partially comprises the second duct portion 13 and the second bottom portion 19. According to an embodiment, the second bottom portion 19 comprises the second bottom wall 27. According to an embodiment, the second bottom wall 27 separates the second valve seat 16 from the first valve seat 15. According to an embodiment, the second bottom wall 28 comprises at least a second bottom opening in fluid communication with the external environment to allow the piston to retract without compressing the air or fluid in the second bottom portion 17. According to an embodiment, the third duct portion 14 leads to the second valve seat 16 through the second valve side opening 20, wherein the second valve side opening 20 is defined on the second side wall 30 of the second duct portion 13.

[0135] According to an embodiment, the first bottom portion 17 comprises a first section 49 of increased cross section and a first section 50 of reduced cross section. According to an embodiment, the first piston 21 slides in a sealed manner against the first sliding wall 32 in the first section 50 of reduced cross section. According to an embodiment, the first reinforcement 41 is housed in the first section 49 of increased cross section. According to an embodiment, the first reinforcement 41 comprises the first bottom wall 25. According to an embodiment, the first reinforcement 41 comprises a first axial edge 51 opposite to the first bottom wall 25.

[0136] According to an embodiment, the second bottom part 19 comprises a second section 52 of increased cross section and a second section 53 of reduced cross section, wherein the second piston 23 slides in a sealed manner against the second sliding wall 37 in the second section 53 of reduced cross section. According to an embodiment, the second reinforcement 45 is housed in the second section 52 of increased cross section. According to an embodiment, the second reinforcement 45 comprises the second bottom wall 27, wherein the second reinforcement 45 comprises a second edge 54 opposite to the second bottom wall 27. According to an embodiment, a locking washer is interposed between the first bottom wall 25 and the second bottom wall 27.

[0137] According to an embodiment, the first transmission element 42 is configured such that when the first piston 21 is in the first pipeline opening configuration, the first transmission element 42 abuts against a corresponding abutment portion of the first reinforcement 41, thereby limiting the maximum stroke that the first piston can move between the first pipeline closing configuration and the first pipeline opening configuration.

[0138] According to an embodiment, the second transmission element 46 is configured such that when the second piston 23 is in the second pipeline opening configuration, the second transmission element 46 abuts against the corresponding abutment portion of the second reinforcement 45, thereby limiting the maximum stroke that the first piston can move between the second pipeline closing configuration and the second pipeline opening configuration.

[0139] According to an embodiment, the pressure balancing device 1 comprises a first discharge portion 55 and a second discharge portion 56, which are adapted to be connected to the third pipe portion 14 to discharge the pressure balancing device 1. According to an embodiment, the first discharge portion 55 and the second discharge portion 56 are made in one piece with the device body 4.

[0140] According to an embodiment, the first connection part 6 and the second connection part 7 are made in a one-piece manner separate from the device body 4 and are connected to the device body 4 in a sealed manner at the at least first circuit-side opening 9 and the at least second circuit-side opening 61, for example by means of an annular gasket 62 placed on the device body 4. According to an embodiment, the first connection part 6 and the second connection part 7 are made in a one-piece manner with the device body 4 and delimit the at least first circuit-side opening 9 and the at least second circuit-side opening 61, respectively.

[0141] According to an embodiment, the device body 4 comprises a first half body 57 and a second half body 5. According to an embodiment, the first half body 57 comprises the first conduit portion 12, the first half of the third conduit portion 14, the first valve seat 15. According to an embodiment, the second half body 58 comprises the second conduit portion 13, the second half of the third conduit portion 14, the second valve seat 16. According to an embodiment, the first half of the third conduit portion 14 is connected to the second half of the third conduit portion 14 in a fluid-tight manner, for example by means of an interposed gasket 59. According to an embodiment, the first half body 57 is constrained to the second half body 58 by means of at least a first pair of connection elements 60, for example of the screwing type, and / or a second pair of connection elements 60, for example of the screwing type, which are housed in respective connection element seats made in the first half body 57 and the second half body 58.

[0142] The invention also relates to a braking system generally indicated by the reference numeral 100 .

[0143] The brake system 100 comprises at least a first circuit 2, the first circuit 2 comprising at least a first pressure chamber of a brake actuator 103, the first pressure chamber being fluidly connected to a first brake actuator 101 to brake the wheels of the vehicle. The brake system 100 comprises at least a second circuit 3, the second circuit 3 comprising at least a second pressure chamber of the brake actuator 103, the second pressure chamber being fluidly connected to a second brake actuator 102 to brake the wheels. The brake system 100 comprises a pressure control device 1 according to any of the above-described embodiments, the pressure control device 1 being connected to the first circuit 2 and the second circuit 3 in parallel with the first brake actuator 101 and the second brake actuator 102, and to the first pressure chamber and the second pressure chamber.

[0144] With the help of this system 100, when the first circuit pressure P1 and the second circuit pressure P2 are higher than the threshold pressure Ps, by activating the brake actuating device 103, the first circuit pressure P1 and the second circuit pressure P2 can be made consistent with the actuating pressure Pa, so as to actuate each brake actuating device 101, 102 with the actuating pressure Pa.

[0145] With the aid of the system 100 , when one of the first circuit pressure P1 and the second circuit pressure P2 is lower than the threshold pressure Ps, by activating the brake actuating device 103 , only one of the first brake actuating device 101 and the second brake actuating device 102 can be actuated with the actuating pressure Pa.

[0146] According to an embodiment, the brake actuation device 103 is a rod-operated tandem master cylinder, or the brake actuation device 103 comprises two independent rod-operated brake master cylinders.

[0147] According to an embodiment, each brake actuation device 101 , 102 is a brake caliper connected to the wheel from opposite sides.

[0148] According to an embodiment, said wheel is the front wheel of a motorcycle.

[0149] The invention also relates to a method for controlling the actuation pressure of at least one brake actuator in a brake system 100. The brake system 100 comprises at least a first circuit 2 comprising at least a first pressure chamber of a brake actuator 103, the first pressure chamber being fluidically connected to a first brake actuator 101 for braking a vehicle, and at least a second circuit 3 comprising at least a second pressure chamber of the brake actuator 103, the second pressure chamber being fluidically connected to a second brake actuator 102 for braking the vehicle.

[0150] The method comprises the following steps:

[0151] - providing a pressure control device 1 comprising a first conduit portion 12 fluidically connectable to the first circuit 2 and a second conduit portion 13 fluidically connectable to the second circuit 3,

[0152] - connecting the first circuit 2 to the second circuit 3 by means of the pressure control device 1, which is arranged in parallel with the first brake actuation device 101 and the second brake actuation device 102 and is connected to the first pressure chamber and the second pressure chamber, by fluidly connecting the first conduit portion 12 to the first circuit 2 and the second conduit portion 13 to the second circuit 3,

[0153] - actuating the brake actuating device 103 by compressing the first circuit fluid in the first conduit portion 12 with the first circuit pressure P1 and compressing the second circuit fluid in the second conduit portion 13 with the second circuit pressure P2,

[0154] - when at least one of the first circuit pressure P1 and the second circuit pressure P2 is lower than the threshold pressure Ps, the fluid between the first pipe portion 12 and the second pipe portion 13 is blocked, so that the first circuit pressure P1 or the second circuit pressure P2 is maintained to reach the actuation pressure Pa, and the brake actuator 101 or the second brake actuator 102 is actuated at the actuation pressure Pa,

[0155] - and when the first circuit pressure P1 and the second circuit pressure P2 are higher than the threshold pressure Ps, the first pipe portion 12 and the second pipe portion 13 are fluidly connected so that the first circuit pressure P1 and the second circuit pressure P2 are consistent with the actuation pressure Pa, and each brake actuator 101, 102 is actuated with the actuation pressure Pa under the condition of the actuation pressure Pa.

[0156] According to the operation mode, the pressure control device 1 is a device according to one of the above-mentioned embodiments. According to the operation mode, the system 100 is a system according to one of the above-mentioned embodiments.

[0157] According to a general embodiment, a pressure control device 1 for a brake system 100 comprises a device body 4 in which at least one conduit 8 is defined, the conduit 8 comprising at least a first conduit portion 12 and at least a second conduit portion 13 .

[0158] The first conduit portion 12 is fluidly connectable to the first circuit 2 to receive the first circuit fluid.

[0159] The first circuit 2 includes a first pressure chamber of a brake actuating device 103 to pressurize the first circuit fluid with a first circuit pressure P1 , wherein the first pressure chamber is fluidly connected to a first brake actuating device 101 to brake the wheels of the vehicle.

[0160] The second conduit portion 13 is fluidly connectable to the second circuit 3 to receive a second circuit fluid, wherein the second circuit 3 comprises a second pressure chamber of the brake actuating device 103 to pressurize the second circuit fluid with a second circuit pressure P2.

[0161] The second pressure chamber is fluidly connected to the second brake actuation device 102 to brake the wheels of the vehicle.

[0162] The pressure control device 1 for the brake system 100 further includes a pressure control mechanism 5 , which is configured to control the first circuit pressure P1 and / or the second circuit pressure P2 to reach an actuation pressure Pa.

[0163] The pressure control mechanism 5 is at least partially accommodated in the duct 8 .

[0164] The pressure control mechanism 5 is designed to separate a first volume V1 bounded by the first conduit portion 12 from a second volume V2 bounded by the second conduit portion 13 in a fluid-tight manner.

[0165] The pressure control mechanism 5 is configured to: when the first circuit pressure P1 and the second circuit pressure P2 are sufficient to actuate the corresponding brake devices 101, 102, by preventing the fluid from passing from the first pipe portion 12 to the second pipe portion 13 or preventing the fluid from passing from the second pipe portion 13 to the first pipe portion 12, control the relative volume change of the first volume portion V1 relative to the second volume portion V2 within the maximum relative volume change, or control the relative volume change of the second volume portion V2 relative to the first volume portion V1 within the maximum relative volume change, so that the The first circuit pressure P1 and the second circuit pressure P2 are consistent with the actuation pressure Pa; and when either the second circuit pressure P2 or the first circuit pressure P1 is insufficient to actuate the corresponding braking device 101, 102, the relative volume change is prevented from exceeding the maximum relative volume change by avoiding the passage of fluid from the first pipeline portion 12 to the second pipeline portion 13 or avoiding the passage of fluid from the second pipeline portion 13 to the first pipeline portion 12, so as to maintain the first circuit pressure P1 or the second circuit pressure P2 to reach the actuation pressure Pa.

[0166] According to an embodiment, the pressure control device 1 comprises a first connection portion 6 fluidically connecting the first pipe portion 12 with the first circuit 2 and a second connection portion 7 connecting the second pipe portion 13 with the second circuit 3 .

[0167] The pressure control mechanism 5 comprises a membrane 9 which separates the first conduit section 12 from the second conduit section 13 in a fluid-tight manner.

[0168] The membrane 9 is elastically movable by elastic means, at least along the longitudinal extension direction XX of the duct 8 , between a first configuration, related to the rest configuration, and a second configuration.

[0169] In the rest configuration, the membrane 9 is in the rest position.

[0170] Between the static configuration and the first configuration, at least a portion of the membrane 9 moves forward along the longitudinal extension direction XX toward the first connecting part 6 by a first stroke within a first maximum stroke, and between the static configuration and the second configuration, at least a portion of the membrane 9 moves forward along the longitudinal extension direction XX toward the second connecting part 7 by a second stroke within a second maximum stroke, thereby increasing or decreasing the relative volume change of the first volume portion V1 relative to the second volume portion V2, or increasing or decreasing the relative volume change of the second volume portion V2 relative to the first volume portion V1.

[0171] According to an embodiment, the membrane 9 comprises a membrane body 10 , wherein the membrane body 10 comprises a membrane edge 11 constrained in a fixed position to a pipe side wall 31 of the pipe 8 in a fluid-tight manner.

[0172] The membrane body 10 includes the elastic means and is capable of elastically deforming in the direction of the first connection portion 6 and in the direction of the second connection portion 7 by respective deformation amounts corresponding to the first maximum stroke and the second stroke.

[0173] According to an embodiment, the maximum relative volume change is equal to the volume swept by the membrane 9 in the following movement: when the first stroke is the first maximum stroke, the movement from the rest configuration to the first configuration; when the second stroke is the second maximum stroke, the movement from the rest configuration to the second configuration.

[0174] According to an embodiment, the pressure control mechanism 5 includes a shell 14, in which a membrane seating portion 15 for a membrane 9 is defined, in which the membrane 9 is able to move within the maximum relative volume change, wherein the shell 14 includes a first half shell 16 and a second half shell 17, wherein the membrane 9 is placed between the first half shell 16 and the second half shell 17, thereby forming a frame for the membrane 9 to prevent the membrane 9 from moving to the outside of the membrane seating portion 15.

[0175] According to an embodiment, the first half-shell 16 and the second half-shell 17 each comprise at least one shell opening 18, so that the membrane has a first membrane surface 19 at least partially directly facing the first connection portion 6 in contact with the first circuit fluid, and a second membrane surface 20 at least partially directly facing the second connection portion 7 in contact with the second circuit fluid.

[0176] According to an embodiment, the first half-shell 16 and the second half-shell 17 are permeable to the first circuit fluid and the second circuit fluid.

[0177] According to an embodiment, said membrane 9 is impermeable to said first circuit fluid and said second circuit fluid.

[0178] According to an embodiment, the first half-shell 16 comprises a first plate-like body 21 and a first annular flange 22 .

[0179] The second half shell 17 includes a second plate-shaped body 23 and a second annular flange 24 .

[0180] The first plate-shaped body 21 includes a first annular edge 25 facing the side wall of the pipe 8 .

[0181] The first annular flange 22 protrudes from the first plate-like body 21 in the direction of the second connecting portion 7 at a first radial distance from the first annular edge 25 .

[0182] The second plate-shaped body 23 includes a second annular edge 26 facing the side wall of the pipe 8 .

[0183] The second annular flange 24 projects from the second plate-like body 23 in the direction of the first connecting portion 6 at a second radial distance from the second annular edge 26 , which is equal to the first radial distance, so as to face the first annular flange 22 .

[0184] The first annular flange 22 bears against the second annular flange 24 in a fluid-tight manner, wherein the membrane 9 is interposed between the first annular flange 22 and the second annular flange 24 .

[0185] The first annular edge 25 , the first annular flange 22 , the second annular flange 24 and the second annular edge 26 form a U-shaped profile suitable for accommodating a sealing gasket suitable for forming a seal with the side wall of the pipe 8 .

[0186] The membrane edge 11 is a sealing gasket configured to form a seal with the wall of the pipe, wherein the thickness of the membrane edge 11 is greater than the thickness of the membrane body 10 .

[0187] Each plate-like body 21 , 23 is traversed by at least one opening 18 , preferably by a plurality of openings 18 .

[0188] According to an embodiment, the membrane 9 comprises a plurality of valleys 27 and a plurality of ridges 28 to increase the surface facing the first and second circuits, preferably, the plurality of valleys 27 and the plurality of ridges 28 are concentric.

[0189] According to an embodiment, the membrane 9 is bellows-shaped.

[0190] According to an embodiment, the device body 4 includes a first half body 29 and a second half body 30, which are connected to each other, for example, by means of threads, such as by a threaded outer surface of the first half body and a threaded inner surface of the second half body, or vice versa.

[0191] The first half body 29 delimits the first duct portion 12 .

[0192] The second half body 30 defines the second duct portion 13 .

[0193] According to an embodiment, the device body 4 defines a third pipe portion, which partially includes the first pipe portion 12 and the second pipe portion 13, and the third pipe portion has a cross-section at opposite ends of the pipe 8 that is larger than the cross-section of the first pipe portion 12 and the cross-section of the second pipe portion 13, thereby defining an increased cross-section of the pipe 8.

[0194] According to an embodiment, the device body 4 defines a mechanism seating portion, which is radially bounded by the pipe side wall 31 relative to the pipe axis XX and is bounded by the second radial crown 33 and the first radial crown 32 of the second half body 30 along the pipe extension direction XX, wherein the pressure control mechanism 5 forms a radial seal with the pipe side wall 31 and abuts against the first radial crown 32 and the second radial crown 33 in the axial direction.

[0195] According to an embodiment, the braking system 100 comprises:

[0196] at least a first circuit 2 comprising at least a first pressure chamber of a brake actuation device 103 , which is fluidically connected to a first brake actuation device 101 in order to brake the wheels of the vehicle,

[0197] at least a second circuit 3 comprising at least a second pressure chamber of said brake actuation device 103 , which is fluidically connected to a second brake actuation device 102 in order to brake said wheels,

[0198] - The pressure control device 1 according to any one of the above-mentioned embodiments is connected to the first circuit 2 and the second circuit 3 in parallel with the first brake actuator 101 and the second brake actuator 102, and is connected to the first pressure chamber and the second pressure chamber, so that: by enabling the brake actuator 103, when the first circuit pressure P1 and the second circuit pressure P2 are sufficient to actuate the corresponding brake actuator 101, 102, each brake actuator 101, 102 is actuated by the actuating pressure Pa, and when one of the first circuit pressure P1 and the second circuit pressure P2 is insufficient to actuate the corresponding brake actuator 101, 102, one of the first brake actuator 101 and the second brake actuator 102 is actuated by the actuating pressure Pa.

[0199] According to an embodiment, the brake actuation device 103 is a rod-operated tandem master cylinder, or the brake actuation device 103 comprises two independent rod-operated brake master cylinders.

[0200] According to an embodiment, each brake actuation device 101 , 102 is a brake caliper connected to the wheel from opposite sides.

[0201] According to an embodiment, said wheel is the front wheel of a motorcycle.

[0202] According to a general embodiment, a method for controlling an actuation pressure of at least one brake actuator in a brake system 100 is described below, wherein the brake system 100 comprises:

[0203] at least a first circuit 2 comprising at least a first pressure chamber of a brake actuating device 103 , which is fluidically connected to a first brake actuating device 101 in order to brake the vehicle,

[0204] - at least a second circuit 3 comprising at least a second pressure chamber of said brake actuating device 103 , fluidically connected to a second brake actuating device 102 , in order to brake said vehicle.

[0205] The method comprises the following steps:

[0206] - providing a pressure control device 1, comprising a first conduit portion 12 fluidically connectable to a first circuit 2 and a second conduit portion 13 fluidically connectable to a second circuit 3, wherein the first conduit portion 12 is fluidically isolated from the second conduit portion 13, wherein the first conduit portion 12 delimits a first volume V1, and wherein the second conduit portion 13 delimits a second volume V2,

[0207] - connecting the first circuit 2 to the second circuit 3 by means of the pressure control device 1, which is arranged in parallel with the first brake actuation device 101 and the second brake actuation device 102 and is connected to the first pressure chamber and the second pressure chamber, by fluidly connecting the first conduit portion 12 to the first circuit 2 and the second conduit portion 13 to the second circuit 3,

[0208] - actuating the brake actuating device 103 by compressing the first circuit fluid in the first conduit portion 12 with the first circuit pressure P1 and compressing the second circuit fluid in the second conduit portion 13 with the second circuit pressure P2;

[0209] - within the maximum relative volume change range, the relative volume change of the first volume portion V1 relative to the second volume portion V2 is performed so as to:

[0210] When the first circuit pressure P1 and the second circuit pressure P2 are sufficient to actuate the corresponding brake actuating devices 101 and 102, the first circuit pressure P1 and the second circuit pressure P2 are made consistent with the actuating pressure Pa, and each brake actuating device 101 and 102 is actuated with the actuating pressure Pa under the actuating pressure Pa,

[0211] as well as,

[0212] When the second circuit pressure P2 or the first circuit pressure P1 is insufficient to actuate the second brake actuator 102 or the first brake actuator 101, the first circuit pressure P1 or the second circuit pressure P2 is maintained to reach the actuating pressure Pa to prevent the relative volume change of the first volume portion V1 and the second volume portion V2 from exceeding the maximum relative volume change, and the brake actuator 101 or the second brake actuator 102 is actuated by the actuating pressure Pa.

[0213] List of reference numerals

[0214] 1. Pressure control device

[0215] 2 First Circuit

[0216] 3 Second Circuit

[0217] 4 Device body

[0218] 5. Pressure regulating mechanism

[0219] 6 First connection part

[0220] 7 Second connection part

[0221] 8 Pipeline

[0222] 9 First circuit side opening

[0223] 10 First valve

[0224] 11 Second valve

[0225] 12 First pipeline section

[0226] 13 Second pipeline section

[0227] 14 Third pipeline section

[0228] 15 First valve seat

[0229] 16 Second valve seat

[0230] 17 First bottom section

[0231] 18 First valve side opening

[0232] 19 Second bottom section

[0233] 20 Second valve side opening

[0234] 21 First piston or first closer element

[0235] 22 first elastic element

[0236] 23 Second piston or second closer element

[0237] 24 Second elastic element

[0238] 25 First bottom wall

[0239] 26 First Wall

[0240] 27 Second bottom wall

[0241] 28 Second Wall

[0242] 29 First side wall

[0243] 30 Second side wall

[0244] 31 First gasket of first piston

[0245] 32 First sliding wall

[0246] 33 Second gasket of the first piston

[0247] 34 First piston head

[0248] 35 First sealing surface

[0249] 36 First gasket of second piston

[0250] 37 Second sliding wall

[0251] 38 Second gasket of the second piston

[0252] 39 Second piston head

[0253] 40 Second sealing surface

[0254] 41 First reinforcement

[0255] 42 First transmission element

[0256] 43 First piston engagement portion

[0257] 44 First piston thrust part

[0258] 45 Second reinforcement

[0259] 46 Second transmission element

[0260] 47 Second piston engagement portion

[0261] 48 Second piston thrust part

[0262] 49 First section with increased cross section

[0263] 50 First section with reduced cross section

[0264] 51 First axial edge

[0265] 52 Second section with increased cross section

[0266] 53 First section with reduced cross section

[0267] 54 Second axial edge

[0268] 55 First discharge section

[0269] 56 Second discharge section

[0270] 57 The first half of the body

[0271] 58 The second half of the body

[0272] 59 Inserted gasket

[0273] 60 Connecting elements

[0274] 61 Second circuit side opening

[0275] 62 Ring washer

[0276] 100 Braking system

[0277] 101 First brake device or first brake caliper

[0278] 102 Second brake device or second brake caliper

[0279] 103 Brake actuator

[0280] P1 First circuit pressure

[0281] P2 Second circuit pressure

[0282] Ps Threshold Pressure

[0283] Pa Actuation pressure

[0284] D Sealing diameter

[0285] XX Longitudinal direction of the first seating portion

[0286] X'-X' The longitudinal direction of the second seating part

[0287] YY First bonding direction

[0288] Y'-Y' second bonding direction.

Claims

1. A pressure control device (1) for a braking system (100), the pressure control device (1) comprising: - a device body (4), the device body (4) partially defining at least a first circuit-side opening (9), at least a second circuit-side opening (61), and at least one conduit (8), the conduit (8) connecting the at least first circuit-side opening (9) and the at least second circuit-side opening (61) in fluid communication, wherein at least one of the conduits (8) comprises at least a first conduit portion (12) and at least a second conduit portion (13), wherein the first conduit portion (12) is fluidically connectable to a first circuit (2) to receive a first circuit fluid, wherein the first circuit (2) comprises a first pressure chamber of a brake actuating device (103) to pressurize the first circuit fluid with a first circuit pressure (P1), wherein the first pressure chamber is fluidically connected to a first brake actuating device (101) to brake a wheel of a vehicle, wherein the second conduit portion (13) is fluidically connectable to a second circuit (3) to receive a second circuit fluid, wherein the second circuit (3) comprises a second pressure chamber of the brake actuating device (103) to pressurize the second circuit fluid with a second circuit pressure (P2), wherein the second pressure chamber is fluidically connected to a second brake actuating device (102) to brake the wheels of the vehicle, - a pressure control mechanism (5), the pressure control mechanism (5) being configured to: control the first circuit pressure (P1) and / or the second circuit pressure (P2) to reach an actuation pressure (Pa), The pressure control mechanism (5) is at least partially accommodated in the pipeline (8), wherein: - when at least one of the first circuit pressure (P1) and the second circuit pressure (P2) is lower than a threshold pressure (Ps), the pressure control mechanism (5) is configured to: block the passage of fluid between the first pipe portion (12) and the second pipe portion (13), or block the passage of fluid between the second pipe portion (13) and the first pipe portion (12), so as to maintain at least one of the first circuit pressure (P1) and the second circuit pressure (P2) higher than the threshold pressure (P2) to reach the actuation pressure (Pa), thereby actuating the first brake device (101) or the second brake device (102), - and when both the first circuit pressure (P1) and the second circuit pressure (P2) are higher than a threshold pressure (Ps), the pressure control mechanism (5) is configured to: fluidly connect the first pipeline portion (12) and the second pipeline portion (13) so that the first circuit pressure (P1) and the second circuit pressure (P2) are consistent with the threshold pressure (Pa), thereby actuating the first braking device (101) and the second braking device (102) with the actuating pressure (Pa).

2. The pressure control device (1) according to the preceding claim, in, The conduit (8) comprises a third conduit portion (14) adapted to fluidically connect at least the first conduit portion (12) and at least the second conduit portion (13), The pressure regulating mechanism (5) comprises a first valve (10) and a second valve (11), wherein the first valve (10) is at least partially accommodated in the first pipe portion (12), and the second valve (11) is at least partially accommodated in the second pipe portion (13), wherein the third pipe portion (14) extends between a first valve side opening (18) and a second valve side opening (20), wherein the first valve side opening (18) is in fluid communication with the first pipe portion (12), and the second valve side opening (20) is in fluid communication with the second pipe portion, wherein the first valve (10) is configured to reversibly open and fluid-tightly close the first valve-side opening (18), wherein when the first circuit pressure (P1) is lower than the threshold pressure (Ps), the first valve (10) closes the first valve-side opening (18) to block the passage of fluid from the first pipe section (12) to the third pipe section (14), or blocks the passage of fluid from the third pipe section (14) to the first pipe section (12), and wherein when the first circuit pressure (P1) is higher than or equal to the threshold pressure (Ps), the first valve (10) opens the first valve-side opening (18) by fluidly connecting the first pipe section (12) to the third pipe section (14), or by fluidly connecting the third pipe section (14) to the first pipe section (12), and wherein, The second valve (11) is configured to reversibly open and fluid-tightly close the second valve-side opening (20), wherein when the second circuit pressure (P2) is lower than the threshold pressure (Ps), the second valve (11) closes the second valve-side opening (20) to block the passage of fluid from the second pipe section (12) to the third pipe section (14), or blocks the passage of fluid from the third pipe section (14) to the second pipe section (12), and wherein when the second circuit pressure (P2) is higher than or equal to the threshold pressure (Ps), the second valve (11) opens the second valve-side opening (20) by fluidly connecting the second pipe section (12) to the third pipe section (14), or by fluidly connecting the third pipe section (14) to the second pipe section (12), and / or wherein the threshold pressure (Ps) is between 1 bar and 10 bar, preferably, the threshold pressure (Ps) is between 1 bar and 4 bar, even more preferably, the threshold pressure (Ps) is between 1 bar and 3 bar, And / or wherein the pressure control device (1) comprises a first connection portion (6) and a second connection portion (7), wherein the first connection portion (6) fluidically connects the first pipe portion (12) to the first circuit (2), and the second connection portion (7) connects the second pipe portion (13) to the second circuit (3).

3. The pressure control device (1) according to the preceding claim, wherein: - the first valve (10) comprises a first piston or a first shutter element (21) housed in a first valve seat (15), the first valve seat (15) being delimited by the device body (4) and at least partially comprising the first conduit portion (12), The first piston (21) is reversibly movable in the first valve seat (15) relative to the device body (4) between a first pipeline closing configuration and at least a first pipeline opening configuration: - in the first duct closed configuration, when the first circuit pressure (P1) is lower than the threshold pressure (Ps), the first piston (21) forms a seal with the first wall (26) of the first valve seat (15), thereby preventing the passage of fluid from the first connection portion (6) to the third duct portion (14), - in the at least first pipeline open configuration, when the first circuit pressure (P1) is at least equal to or higher than the threshold pressure (Ps), the first piston (21) is spaced apart from / avoids forming a seal with the first wall (26), and the first piston (21) and the device body (4) define a first fluid channel, the first fluid channel sweeping over at least one head portion of the first piston (21), thereby allowing the passage of fluid from the first connecting part (6) to the third pipeline part (14), and / or wherein, - the second valve (11) comprises a second piston or a second shutter element (23) housed in a second piston seat (16), the second piston seat (16) being delimited by the device body (4) and at least partially comprising the second duct portion (13), The second piston (23) is reversibly movable in the second valve seat (16) relative to the device body (4) between a second conduit closing configuration and at least a second conduit opening configuration: - in the second pipeline closed configuration, when the second circuit pressure (P2) is lower than the threshold pressure (Ps), the second piston (23) forms a seal with the second wall (28) of the second valve seat (16), thereby preventing the passage of fluid from the second connection part (7) to the third pipeline part (14), or preventing the passage of fluid from the third pipeline part (14) to the second connection part (7), - in the at least second pipeline open configuration, when the second circuit pressure (P2) is at least equal to or higher than the threshold pressure (Ps), the second piston (23) is spaced apart from / avoids forming a seal with the second wall (28), and the second piston (23) and the device body (4) define a second fluid channel, the second fluid channel at least partially passing over the head portion of the second piston (23), thereby allowing the passage of fluid from the first connecting part (7) to the third pipeline part (14), and / or wherein the first valve (10) and the second valve (11) are non-return valves, and / or wherein, The first valve seating portion (15) extends along the longitudinal direction (XX) of the first valve, The second valve seating portion (16) extends along the longitudinal direction (X'-X') of the second valve, wherein the third pipe section (14) is joined to the first valve seat (15) and the second valve seat (16) according to respective joining directions (YY, Y'-Y'), the joining directions (YY, Y'-Y') being inclined with respect to the longitudinal direction (XX) of the first valve and the longitudinal direction (X'-X') of the second valve and / or being transverse to the longitudinal direction (XX) of the first valve and the longitudinal direction (X'-X') of the second valve, And / or wherein the longitudinal direction (XX) of the first valve and the longitudinal direction (X'-X') of the second valve are parallel and / or coincident.

4. The pressure control device (1) according to the preceding claim, wherein: - the first valve (10) comprises a first elastic element (22) housed in the first valve seat (15), wherein the first elastic element (22) is disposed between the first piston (21) and the device body (4), preferably, the first elastic element (22) is disposed between the first piston (21) and the first bottom wall (25) of the first valve seat (15) to continuously bias the first piston (21) toward the first pipeline closing configuration, wherein the first elastic element (22) is sized such that: when the first circuit pressure (P1) is lower than the threshold pressure (Ps), the first piston is in the first pipeline closing configuration, - the second valve (11) comprises a second elastic element (24) housed in the second valve seat (16), Wherein, the second elastic element (24) is arranged between the second piston (23) and the device body (4), preferably, the second elastic element (24) is arranged between the second piston (23) and the second bottom wall (26) of the second valve seat (16) to continuously bias the second piston (23) toward the second pipeline closing configuration, wherein the second elastic element (24) is sized so that: when the second circuit pressure (P2) is lower than the threshold pressure (Ps), the first piston is in the second pipeline closing configuration.

5. The pressure equalization device (1) according to any one of the preceding claims 3 to 4, wherein: The first piston (21) comprises a first gasket (31) of the first piston, wherein the first gasket (31) of the first piston is configured such that, in any position of the first piston (21) between the at least first pipeline opening configuration and the first pipeline closing configuration, the first gasket (31) of the first piston forms a seal with a first sliding wall (32) of the first valve seat (15), thereby fluidically isolating the first elastic element (22) from the third pipeline portion (14) and / or the first circuit (2), and / or where The second piston (23) comprises a first gasket (36) of the second piston, wherein the first gasket (36) of the second piston is configured such that, in any position of the second piston (23) between the at least second pipeline opening configuration and the second pipeline closing configuration, the first gasket (36) of the second piston forms a seal with a second sliding wall (37) of the second valve seat (16), thereby fluidically isolating the second elastic element (24) from the third pipeline portion (14) and / or the second circuit (3).

6. The pressure control device (1) according to any one of the preceding claims 3 to 5, wherein: The first piston (21) comprises a second gasket (33) of the first piston, the second gasket (33) of the first piston being configured such that when the first piston (21) is in the first conduit closing configuration, the second gasket (33) of the first piston forms a seal with the first wall (26), and wherein when the first piston (21) is in the first conduit opening configuration, the second gasket (33) of the first piston is spaced apart from the first wall (26), thereby opening the first fluid passage, and / or where The second piston (23) includes a second gasket (38) of the second piston, and the second gasket (38) of the second piston is configured such that: when the second piston (23) is in the second pipeline closing configuration, the second gasket (38) of the second piston forms a seal with the second wall (28), and wherein, when the second piston (38) is in the second pipeline opening configuration, the second gasket (38) of the second piston is spaced apart from the second wall (28), thereby opening the second fluid channel.

7. The pressure control device (1) according to the preceding claim, wherein: The second gasket (33) of the first piston is a gasket suitable for being assembled on the first piston body or a gasket suitable for being inserted into an axial annular seat formed on the first piston head. or among them, The first piston (21) comprises a first piston head (34), wherein the first piston head (34) comprises a first sealing surface (35), and when the first piston (26) is in the first pipeline closing configuration, the first sealing surface (35) is suitable for forming a geometric structure seal by abutting against the first wall (26), wherein the second gasket (33) of the first piston is the first sealing surface (35), wherein the first wall (26) and the first sealing surface (35) have a surface roughness such that the first wall (26) and the first sealing surface (35) form a hydraulic seal when abutting against each other, and / or where The second gasket (38) of the second piston is a gasket suitable for being fitted to the second piston body of the second piston (38) or a gasket suitable for being inserted into an axial seat formed on the second piston head (39), or wherein, The second piston (23) includes a second piston head (39), wherein the second piston head (39) includes a second sealing surface (40), and when the second piston (23) is in the second pipeline closed configuration, the second sealing surface (40) is suitable for forming a geometric structure seal by axially abutting against the second wall (28), and wherein when the second piston (23) is in the at least second open configuration, the sealing surface (40) is spaced apart from the second wall (28), wherein the second gasket (38) of the second piston is the second sealing surface (40), and wherein the surface roughness of the second wall (28) and the second sealing surface (40) is such that the second wall (28) and the second sealing surface (40) form a hydraulic seal when abutting against each other.

8. The pressure control device (1) according to any one of the preceding claims 6 to 7, wherein: The first wall (26) delimits a portion of the first valve seat (15) at an upper lateral limit, preferably, the first wall (26) delimits a first circuit-side portion of the first conduit portion (12) at an upper lateral limit, and / or The first wall (26) is a connecting wall between two sections of the first pipe section (12), and the first wall (26) forms a first cross-sectional narrowing portion of the first pipe section (12). and / or wherein the second wall (28) laterally delimits a portion of the second valve seating portion (15), preferably, the second wall (28) laterally delimits a second circuit-side portion of the second conduit portion (13), and / or wherein the second wall (28) is a connecting wall between two sections of the second conduit portion (13), the second wall (28) forming a second cross-sectional narrowing portion of the second conduit portion (13), and / or wherein the first connecting portion (6) and the first wall (26) partially define the first duct portion (12), The second connecting portion (7) and the second wall (28) partially define the second duct portion (13), wherein the first sealing surface (35) and the first wall (26) respectively form an annular geometric structure seal, and the second sealing surface (40) and the second wall (28) respectively form an annular geometric structure seal, in, The first sealing surface (35) and the second sealing surface (40) are respectively the tapered surface of the first piston head (34) and the tapered surface of the second piston head (39), wherein the first wall (26) and the second wall (28) are tapered surfaces, and the tapered angles of the tapered surfaces relative to the longitudinal extension direction (XX, X'-X') of the corresponding valve seat are greater than the tapered angles of the first sealing surface (35) and the second sealing surface (40) relative to the longitudinal extension direction (XX, X'-X') of the corresponding valve seat, preferably wherein the second sealing surface (40) and the second wall (28), the first sealing surface (35) and the first wall (26) are all conical surfaces, so that the corresponding piston head is wedged into the first wall (26) or the second wall (28), and the corresponding annular gasket is placed between the corresponding piston head and the first wall (26) or the second wall (28), Alternatively, the second gasket (33) of the first piston and the second gasket (39) of the second piston are annular O-rings accommodated in annular seating portions of the corresponding pistons (21, 23), wherein the annular seating portions of the corresponding pistons (21, 23) are axial annular seating portions.

9. The pressure control device (1) according to any one of claims 4 to 8, in, The pressure regulating mechanism (5) comprises a first reinforcement member (41) and a first transmission element (42), wherein the first elastic element (22) is accommodated in the first reinforcement member (41), wherein the first reinforcement member (41) forms a first bottom of the first valve seat (15), wherein the first elastic element (22) is connected to the first piston (21) by means of the first transmission element (42), wherein the first transmission element (42) is adapted to receive the first piston engagement portion (43) so as to be connected to the first piston (21) by form-fit connection and / or by interference and / or by interlocking / engaging, wherein the first transmission element (42) is adapted to abut against the first piston thrust portion (44), and / or wherein, The pressure regulating mechanism (5) comprises a second reinforcement member (45) and a second transmission element (47), wherein the second elastic element (24) is accommodated in the second reinforcement member (45), wherein the second reinforcement member (45) forms a second bottom of the second valve seat (16), wherein the second elastic element (24) is connected to the second piston (23) by means of the second transmission element (47), wherein the second transmission element (46) is adapted to receive the second piston engagement portion (47) so as to be connected to the second piston (23) by form-fit connection and / or by interference and / or by interlocking / engaging, Wherein, the second transmission element (46) is adapted to abut against the second piston thrust portion (48).

10. The pressure control device (1) according to claim 9, in, The first elastic element (22) and the second elastic element (24) respectively comprise a first spring and a second spring, wherein the first spring and the second spring are wire springs, wherein the wire springs are dimensioned to allow the corresponding pistons (21, 23) to retract when the corresponding pressure (P1, P2) exerted by the corresponding fluid on the surface of the piston head facing the first circuit or the second circuit is higher than the threshold pressure (Ps1), and / or wherein the first transmission element (42) and the second transmission element (46) respectively have a first T-shaped body and a second T-shaped body, the first T-shaped body and the second T-shaped body having a T-shaped cross-section and having a longitudinal through hole, wherein the first T-shaped body has a first elongated rod and a first enlarged head, wherein the first elongated rod is received within the turns of the first spring, wherein the end turns of the first spring abut against the outer first head surface of the first enlarged head, wherein the first elongated rod internally defines a first engagement seat for engaging with the first piston engagement portion (43) by interference and / or by form fit coupling and / or by engagement, wherein the first piston thrust portion (44) abuts against an inner first head surface of the first enlarged head, wherein the second T-shaped body has a second elongated rod and a second enlarged head, wherein the second elongated rod is received within the turns of the second spring, wherein the end turns of the second spring abut against the outer second head surface of the second enlarged head, wherein the second elongated rod internally defines a second engagement seat for engaging with the second piston engagement portion (47) by interference and / or by form fit coupling and / or by engagement, wherein the second piston thrust portion (48) abuts against an inner second head surface of the second enlarged head, And / or wherein the first spring and the second spring are fixed to the first bottom wall (25) and the second bottom wall (27), respectively.

11. The pressure equalization device (1) according to any one of the preceding claims 2 to 10, in, The first connection part (6) and the second connection part (7) are made in a one-piece manner separate from the device body (4), and the first connection part (6) and the second connection part (7) are sealingly connected to the device body (4) at the at least first circuit side opening (9) and the at least second circuit side opening (61), for example, the first connection part (6) and the second connection part (7) are sealingly connected to the device body (4) at the at least first circuit side opening (9) and the at least second circuit side opening (61) by placing an annular gasket (62) in the device body (4), or wherein The first connecting portion (6) and the second connecting portion (7) are made in one piece with the device body (4), and the first connecting portion (6) and the second connecting portion (7) respectively define the at least first circuit-side opening (9) and the at least second circuit-side opening (61), And / or wherein the device body (4) comprises a first half body (57) and a second half body (58), The first half body (57) includes the first pipeline portion (12), the first half of the third pipeline portion (14), and the first valve seat (15). The second half body (58) includes the second pipe portion (13), the second half of the third pipe portion (14), and the second valve seat (16). wherein the first half of the third pipe section (14) is connected to the second half of the third pipe section (14) in a fluid-tight manner, for example, the first half of the third pipe section (14) is connected to the second half of the third pipe section (14) in a fluid-tight manner via an inserted gasket (59), In which, the first half body (57) is constrained to the second half body (58) by at least a first pair of connecting elements (60) and / or a second pair of connecting elements (60), for example, the first pair of connecting elements (60) are of a screw-on type, for example, the second pair of connecting elements (60) are of a screw-on type, and the first pair of connecting elements (60) and the second pair of connecting elements (60) are accommodated in corresponding connecting element seating portions formed in the first half body (57) and the second half body (58).

12. A braking system (100), the braking system (100) comprising: at least a first circuit (2) comprising at least a first pressure chamber of a brake actuating device (103), said first pressure chamber being fluidically connected to a first brake actuating device (101) for braking the wheels of the vehicle, - at least a second circuit (3) comprising at least a second pressure chamber of the brake actuation device (103), the second pressure chamber being fluidically connected to a second brake actuation device (102) for braking the wheel, - The pressure control device (1) according to any one of the preceding claims 1 to 12, the pressure control device (1) being connected to the first circuit (2) and the second circuit (3) in parallel with the first brake actuation device (101) and the second brake actuation device (102), and the pressure control device (1) being connected to the first pressure chamber and the second pressure chamber, so that: By activating the brake actuating device (103), when the first circuit pressure (P1) and the second circuit pressure (P2) are higher than the threshold pressure (Ps), each brake actuating device (101, 102) is actuated with the actuating pressure (Pa), And when one of the first circuit pressure (P1) and the second circuit pressure (P2) is lower than the threshold pressure (Ps), one of the first brake actuating device (101) and the second brake actuating device (102) is actuated with the actuating pressure (Pa).

13. Braking system (100) according to the preceding claim, wherein: The brake actuation device (103) is a rod-operated tandem master cylinder, or wherein the brake actuation device (103) comprises two independent rod-operated brake master cylinders, and / or wherein each brake actuation device (101, 102) is a brake caliper connected to the wheel from opposite sides, And / or wherein the wheel is the front wheel of a motorcycle.

14. A method for controlling the actuation pressure of at least one brake actuator in a brake system (100), wherein: The braking system (100) comprises: at least a first circuit (2), said first circuit (2) comprising at least a first pressure chamber of a brake actuating device (103), said first pressure chamber being fluidically connected to a first brake actuating device (101) for braking the vehicle, - at least a second circuit (3) comprising at least a second pressure chamber of the brake actuating device (103), the second pressure chamber being fluidically connected to a second brake actuating device (102) for braking the vehicle, Wherein, the method comprises the following steps: - providing a pressure control device (1), comprising a first conduit portion (12) fluidically connectable to the first circuit (2) and a second conduit portion (13) fluidically connectable to the second circuit (3), - connecting the first circuit (2) to the second circuit (3) by means of the pressure control device (1) by fluidly connecting the first conduit portion (12) to the first circuit (2) and by fluidly connecting the second conduit portion (13) to the second circuit (3), the pressure control device (1) being arranged in parallel with the first brake actuating device (101) and the second brake actuating device (102) and the pressure control device (1) being connected to the first pressure chamber and the second pressure chamber, - actuating the brake actuating device (103) by compressing a first circuit fluid in the first conduit portion (12) with a first circuit pressure (P1) and compressing a second circuit fluid in the second conduit portion (13) with a second circuit pressure (P2), - until at least one of the first circuit pressure (P1) and the second circuit pressure (P2) is lower than a threshold pressure (Ps), the fluid flow between the first pipe portion (12) and the second pipe portion (13) is blocked to maintain the first circuit pressure (P1) or the second circuit pressure (P2) to reach the actuation pressure (Pa), and the first brake actuation device (101) or the second brake actuation device (102) is actuated with the actuation pressure (Pa), - When the first circuit pressure (P1) and the second circuit pressure (P2) are higher than a threshold pressure (Ps), the first conduit portion (12) and the second conduit portion (13) are fluidly connected so that the first circuit pressure (P1) and the second circuit pressure (P2) are consistent with an actuation pressure (Pa), and each brake actuation device (101, 102) is actuated with the actuation pressure (Pa) under the actuation pressure (Pa).

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