Motorcycle brake-by-wire brake system
Patent Information
- Application Number
- JP2023568146
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2021-05-06
- Filing Date
- 2022-05-04
- Publication Date
- 2025-05-07
- Estimated Expiration
- 2042-05-04
AI Technical Summary
Existing brake-by-wire braking systems in motorcycles lack a hydraulic backup mechanism that allows direct manual operation in case of failure, and they are not compatible with electric vehicles requiring regenerative braking and residual torque reduction.
A brake system incorporating a first hydraulic supply circuit with an electrically or electromechanically actuated piston, a manually actuated piston, and a bypass duct connected to a hydraulic reservoir, allowing manual operation in backup mode, and integrated with a processing and control unit to manage fluid flow between the pistons and actuators.
Enables direct manual braking in case of system failure and compatibility with electric vehicles by providing a hydraulic backup and integrating regenerative braking, ensuring reliable braking performance.
Smart Images
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Abstract
Description
[Technical field]
[0001] The present invention relates to a brake-by-wire (BBW) braking system, particularly for motorcycles. [Background technology]
[0002] In motorcycles, there are brake-by-wire type braking systems in which the user can manually operate two separate hand controls, typically a lever on the handlebars and a pedal, to send braking requests to a special control unit.
[0003] This request for braking is then converted into the activation of one or more electric motors acting on friction elements (usually pads, but could also be shoes) of the braking equipment with which the motorcycle is equipped. Thus, under normal driving conditions, the user does not directly command the activation of the braking equipment, but rather transmits a braking request by the control unit which activates said electric motors.
[0004] In the event of a failure, the system must provide hydraulic back-up to allow the user to at least partially brake the motorcycle through direct operation of a manually actuated device.
[0005] Prior art motorcycle solutions do not provide hydraulic backup from both controls (lever and brake pedal) in case of E / E system (ECU, actuators, sensors, etc.) failure or no power supply (battery disconnected).Finally, a need is felt to provide a braking system (mixed with regenerative braking, residual torque reduction) compatible with electric vehicles. Summary of the Invention
[0006] Therefore, a need is felt in the art to provide a braking system that can overcome the technical drawbacks discussed with reference to the prior art.
[0007] This need is met by a braking system according to claim 1.
[0008] In particular, this need is met by a braking system for a motorcycle comprising:
[0009] at least one first brake device operably connected to a first wheel of the motorcycle and having a first hydraulic supply circuit;
[0010] a first electric actuator having first electric or electromechanical motor means operatively connected to a first electrically or electromechanically actuated piston fluidly connected to said first hydraulic supply circuit;
[0011] At least one first interface port operably connected to a first hydraulic device having a first manually operated piston.
[0012] The first manually operated piston includes a first direct piston directly connected to the first manual actuator; a first direct piston connected in series with the first indirect piston and connected to the first direct piston by the interposition of a first return spring.
[0013] A first indirect piston is hydraulically connected to the first hydraulic supply circuit via a first bypass duct and is arranged in series upstream of a first electrically or electromechanically actuated piston.
[0014] The brake system includes a hydraulic fluid reservoir fluidly connected to the first hydraulic device by a connecting duct upstream from the first articulated piston and a connecting duct downstream from the first articulated piston.
[0015] The braking system includes a processing and control unit operatively connected to the first electric actuator.
[0016] The processing and control unit is programmed, in standard operation, upon actuation of the first interface port, to translate a first electrically or electromechanically actuated piston to block the first bypass duct, fluidly isolate the first manually operated piston from the first hydraulic supply circuit, and simultaneously actuate at least one first brake device.
[0017] According to a possible embodiment, at least one of the upstream and downstream connecting ducts comprises at least one device having at least one operating state, such as an open position, allowing the fluid to pass through the corresponding connecting duct, and at least one operating state, such as a closed position, preventing the fluid from passing through the corresponding connecting duct. In the above-mentioned standard operation, a device such as a selector valve is switched so that the indirect piston cannot move even following manual actuation and remains in an end stop position, while a first electrically or electromechanically actuated piston is translated to simultaneously actuate at least one first brake device.
[0018] According to a possible embodiment, at least one device provides two operating states in which fluid is prevented or allowed to pass through the corresponding upstream connecting duct in order to isolate the contribution of the first return spring during operation in hydraulic backup mode.
[0019] According to a possible embodiment, the processing and control unit is programmed to, in the backup mode, retract or allow retraction of the first electrically or electromechanically actuated piston so as not to block the first bypass duct and to allow direct actuation of the first brake device by the first manually operated piston when the first interface port is actuated.
[0020] According to a possible embodiment, the processing and control unit is programmed to switch a device, such as a selector valve, in said backup operation to allow the first indirect piston to move according to manual actuation.
[0021] According to a possible embodiment, the first hydraulic supply circuit is fluidly connected to a pair of first brake devices which may be connected to the same first wheel.
[0022] According to a possible embodiment, the first hydraulic supply circuit is fluidly connected to a pair of first brake devices which may be connected respectively to said first and second wheels arranged on different axles of the motorcycle.
[0023] According to a possible embodiment, the brake system comprises at least one second manual actuator separated from the first manual actuator and operably connected to a second hydraulic device comprising a second manually operated piston.
[0024] Here, the second manually operated piston is hydraulically connected to the first indirect piston via a second bypass duct and is arranged in series with the first indirect piston on the upstream side, and this first indirect piston is fluidly connected to a first hydraulic supply circuit and actuates the first brake device and / or the second brake device via this first hydraulic supply circuit.
[0025] According to a possible embodiment, the second manually operated piston is subdivided into a second direct piston, which is directly connected to the second manual actuator, and a second indirect piston, which is arranged in series with the second direct piston and connected thereto by the interposition of a second return spring.
[0026] According to a possible embodiment, the second articulated piston is in hydraulic communication with the first articulated piston via a second bypass duct and is arranged upstream and in series with it.
[0027] According to a possible embodiment, the first brake device is operatively connectable to the first wheel of a first single axle of the motorcycle, and the second brake device is operatively connectable to a second wheel of a second axle of the motorcycle.
[0028] According to a possible embodiment, the first hydraulic device and the second hydraulic device are contained in the same pump body.
[0029] According to a possible embodiment, the system comprises:
[0030] at least a second brake device operably connected to a second wheel of the motorcycle and including a second hydraulic supply circuit fluidly isolated from the first hydraulic supply circuit;
[0031] a second electric actuator having second electric motor means operably connected to an electrically or electromechanically operated second piston, the second electric actuator being fluidly connected to said second supply circuit;
[0032] At least a second manually actuated device operably connected to the second hydraulic device having a second manually actuated piston.
[0033] A second manually operated piston is in fluid communication with the second supply circuit via a second bypass duct and is disposed upstream in series with a second electrically or electromechanically actuated piston.
[0034] A processing and control unit is operatively connected to the second interface port and to the second electrical actuator and is programmed as follows.
[0035] In normal operation, operation of the second interface port translates the second electrically or electromechanically actuated piston to block the second bypass duct, fluidly isolating the second manually operated piston from the second supply circuit and actuating the second brake device.
[0036] According to a possible embodiment, at least one of the upstream and downstream connecting ducts is provided with a device having at least one operating state, such as an open position, allowing the fluid to pass through the corresponding connecting duct, and another operating state, such as a closed position, preventing the fluid from passing through the corresponding connecting duct. In the normal operation, a device such as a selector valve is switched so that the second indirect piston does not move even after manual operation, while a second electrically or electromechanically actuated piston is translated so as to simultaneously actuate at least one second brake device.
[0037] According to a possible embodiment, the processing and control unit is programmed to retract or allow the second electrically or electromechanically actuated piston to retract in backup operation so as not to block the second bypass duct, allowing direct actuation of the second brake device by the second manually operated piston.
[0038] According to a possible embodiment, the processing and control unit is programmed to switch a device such as a selector valve so that, in backup operation, the second indirect piston can move according to manual actuation.
[0039] According to a possible embodiment, said first and second braking devices are arranged on different axles of the associated motorcycle.
[0040] According to a possible embodiment, the first hydraulic device and the second hydraulic device are contained in the same pump body.
[0041] According to a possible embodiment, the braking device comprises a disc brake and / or a drum brake. [Brief description of the drawings]
[0042] Further features and advantages of the present invention will become more apparent from the following description of preferred, non-limiting embodiments thereof.
[0043] [Figure 1] FIG. 1 is a schematic diagram of a braking system according to a first embodiment of the invention in standard operating conditions.
[0044] [Figure 2a] FIG. 2a shows a schematic diagram of a braking system according to a second embodiment of the invention in standard operating conditions. [Figure 2b] FIG. 2b shows a schematic diagram of a braking system according to a second embodiment of the invention in a BBW system shutdown state. [Figure 2c] FIG. 2c shows a schematic diagram of a braking system according to a second embodiment of the invention in a failure or back-up condition.
[0045] [Diagram 3] FIG. 3 is a schematic diagram of a braking system according to a third embodiment of the invention, in standard operating conditions. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0046] Elements or parts of elements that are common to the embodiments described below are designated by the same reference numerals.
[0047] With reference to the aforementioned figures, the reference numeral 4 generally indicates a braking system for a vehicle, in particular a motorcycle 8 .
[0048] The braking system 4 for the motorcycle 8 includes at least a first brake device 12 operably connected to a first wheel 16 of the motorcycle 8 and having a first hydraulic supply circuit 20. The braking system 4 further includes a first electric actuator 24 having first electric or electromechanical motor means operably connected to a first electrically or electromechanically actuated piston 28, fluidly connected to the first hydraulic supply circuit 20.
[0049] The connection between the electric or electromechanical motor means and the first electric or electromechanically actuated piston 28 may be direct or an intermediate mechanical connection such as a gear, gearbox, linkage or the like may be provided.
[0050] An electrically or electromechanically operated first piston 28 is inserted into the first hydraulic supply circuit 20 and, when moved, is capable of pressurizing the fluid contained in the first hydraulic supply circuit and actuating the corresponding first brake device 12.
[0051] The braking system 4 includes at least a first interface or input port 32 operably connected to a first hydraulic system 36 having a first manually operated piston 40. Typically, the first interface port 32 is operably connected to a lever system, typically located on the handlebars of the motorcycle 8, or a foot pedal located near the footpegs.
[0052] A first manually operated piston 40 is hydraulically connected to the first hydraulic supply circuit 20 via a first bypass duct 44 and is arranged upstream in series with the first electrically or electromechanically actuated piston 28 .
[0053] The first manually operated piston 40 is in turn subdivided into a first direct piston 41 directly connected to the first interface port 32 and a first indirect piston 42 arranged in series with the first direct piston 41 and connected thereto by the interposition of a first return spring 43. A first hydraulic chamber 45 is interposed between the first direct piston 41 and the first indirect piston 42. In this configuration, the first indirect piston 42 pressurizes the fluid in the first hydraulic supply circuit 20 in a hydraulic backup state when it is free to move.
[0054] The first hydraulic device 36 also comprises a first retainer 48 which forms a limit stop for the first indirect piston 42 as it approaches the first direct piston 41 .
[0055] The brake device 4 includes a hydraulic fluid reservoir 52 fluidly connected to a first hydraulic chamber 45 interposed between the direct piston 41 and the indirect piston 42 by an upstream connecting duct 56 of the first indirect piston 42 and a downstream connecting duct 60 of the first indirect piston 42. Furthermore, the hydraulic fluid reservoir 52 is directly fluidly connected to the first bypass duct 44 by a connecting duct or supply duct 94.
[0056] Preferably, the first retainer 48 is positioned so that the first indirect piston 42 does not block the upstream connecting duct 56 .
[0057] Preferably, each of the upstream connecting duct 56 and the downstream connecting duct 60 is provided with at least one device 86, 64, respectively, capable of blocking the advancement of the indirect piston 42 in one of its operating states, and in particular, the at least one device 86, 64 provides at least one operating state, such as an open position, allowing fluid to pass through the corresponding connecting duct 56, 60, and at least one operating state, such as a closed position, blocking fluid from passing through the corresponding connecting duct 56, 60.
[0058] Preferably, at least one device 86, 64 provides at least one operating state that prevents fluid from passing through the corresponding downstream connecting duct 60, thereby preventing forward movement of the first indirect piston 42, and one operating state that allows fluid to pass through the downstream connecting duct 60.
[0059] Preferably, at least one device 86, 64 is capable of providing two operating conditions in which fluid is either prevented or allowed to pass through the corresponding upstream connecting duct 56 in order to isolate the contribution of the return spring 43 during operation in hydraulic backup mode.
[0060] Preferably, the at least one device 86, 64 is a selector valve. According to one embodiment, the at least one selector valve 86, 64 is thus switched to allow switching between a standard operating mode and a hydraulic back-up mode.
[0061] Preferably, at least one of the selector valves 86, 64 is operatively connected to a processing and control unit 68, which is better described below.
[0062] According to one possible embodiment, at least one selector valve 86, 64 also includes a partially open position in which it functions as a one-way valve allowing hydraulic fluid to flow in only one direction, specifically from the hydraulic fluid reservoir 52 through the ducts 60, 56 to the pistons 41, 42.
[0063] Advantageously, the system comprises a processing and control unit 68 operatively connected to the first interface port 32 and to said first electric actuator 24 .
[0064] The processing and control unit 68 is programmed, in standard operation, upon actuation of the first interface port 32, to translate the first electrically or electromechanically actuated piston 28 to block the first bypass duct 44, fluidly isolate the first manually actuated piston 40 from the first hydraulic supply circuit 20, and simultaneously actuate the at least one first brake device 12.
[0065] Because the first bypass duct 44 is blocked, the actuation of the first braking device 12 cannot be directly adjusted by the user, but is instead actuated by a first electrically or electromechanically actuated piston 28.
[0066] Preferably, in normal operation, at least one selector valve 86, 64 is switched such that the indirect piston 42 cannot move even following manual actuation and remains in the end position defined by the first retainer 48, while the first electrically or electromechanically actuated piston 28 is translated to simultaneously actuate at least one first brake device 12.
[0067] Further, according to one possible embodiment, the processing and control unit 68 is programmed to retract or allow retraction of the first electrically or electromechanically actuated piston 28 in backup operation so as not to block the first bypass duct 44, allowing direct actuation of the first brake device 12 by the first manually actuated piston 40 when the first interface port 32 is actuated.
[0068] Preferably, the processing and control unit 68 is programmed to enable switching of at least one selector valve 86, 64 in backup operation to allow the first indirect piston 42 to move in accordance with manual actuation.
[0069] Preferably, at least one of the selector valves 86, 64 is switched to the backup operating state via a resilient element.
[0070] In other words, in the event of an electrical failure or backup condition, the user can always brake or stop the motorcycle 8 by directly actuating the first braking device 12 via the first interface port 32 .
[0071] The first hydraulic supply circuit 20 may be fluidly connected to a pair of first braking devices 12 ′, 12 ″, which may be connected to the same first wheel 16 .
[0072] The first hydraulic supply circuit 20 may also be fluidly connected to a pair of braking devices 12 ′, 12 ″ connectable to a first wheel 16 and a second wheel 76 , respectively, located on different axles of the motorcycle 8 .
[0073] According to a further embodiment of the present invention (Figures 2a to 2c), the brake system 4 comprises, apart from the first input port 32, at least one second input port 92 operably connected to a second hydraulic device 96 having a second manually operated piston 100.
[0074] The second manually operated piston 100 is hydraulically connected to the first indirect piston 42 (which in turn is connected to the first manually operated piston 41) via a second bypass duct 104 and is arranged in series upstream with the first indirect piston 42. The first indirect piston 42 is fluidly connected to the first hydraulic supply circuit 20 and actuates the first braking device 12 and / or the second braking device 72 therethrough.
[0075] Preferably, the first and second hydraulic systems 36, 96 are incorporated into the same hydraulic system.
[0076] According to a possible embodiment, the first braking device 12 is operatively connected to a first wheel 16 of a first single axle of the motorcycle 8, and the second braking device 72 is operatively connected to a second wheel 76 of a second axle of the motorcycle 8.
[0077] The second indirect piston 102 is in hydraulic communication with the first indirect piston 42 via a second bypass duct 104 and is disposed in series upstream therewith.
[0078] According to one possible embodiment, the second manually operated piston 100 is subdivided into a second direct piston 101, which is directly connected to the second manual actuator 92, and a second indirect piston 102, which is arranged in series with the second direct piston 101 and connected thereto by the interposition of a second return spring 103. In such a configuration, the second indirect piston 102 pressurizes the fluid in a second bypass port 104. A second hydraulic chamber 105 is interposed between the second direct piston 101 and the second indirect piston 102.
[0079] The second hydraulic device 96 also includes a second retainer 108 which forms a limit stop for the second indirect piston 102 as it approaches the second direct piston 101 .
[0080] As can be seen, the braking device 4 includes a hydraulic fluid reservoir 52 fluidly connected to the second hydraulic device 96 by an upstream duct 56 connected to a second indirect piston 102 and a downstream duct 60 connected to the second indirect piston 102.
[0081] Preferably, the second retainer 108 is arranged so that the second indirect piston 102 does not block the upstream connecting duct 56 .
[0082] Preferably, each of the upstream connecting duct 56 and the downstream connecting duct 60 comprises at least one selector valve 86, 64 having at least one operational state, such as an open position, allowing fluid to pass through the corresponding connecting duct 56, 60, and at least one operational state, such as a closed position, preventing fluid from passing through the corresponding connecting duct 56, 60. The selector valve 64 is operatively connected to a processing and control unit 68.
[0083] According to a contemplated embodiment, at least one of the selector valves 86, 64 also includes a partially open position that functions as a one-way valve allowing fluid to flow in only one direction, specifically from the hydraulic fluid reservoir 52 to the second hydraulic device 96.
[0084] According to a further embodiment of the invention (FIG. 3), the braking system 4 of the motorcycle 8 comprises at least one second braking device 72 operably connected to a second wheel 76 of the motorcycle 8 and comprising a second hydraulic supply circuit 80 fluidly separated from the first hydraulic supply circuit 20.
[0085] The braking device 4 includes a second electric actuator 84 having a second electric motor means operatively connected to a second electrically or electromechanically actuated piston 88 fluidly connected to a second hydraulic supply circuit 80, and at least a second manual actuator 92 operatively connected to a second hydraulic device 96 having a second manually operated piston 100.
[0086] A second manually operated piston 100 is hydraulically connected to the second hydraulic supply circuit 80 by a second bypass duct 104 and is arranged upstream in series with the second electrically or electromechanically operated piston 88.
[0087] The processing and control unit 68 is operatively connected to the second interface port 92 and the second electric actuator 84 and is programmed, in standard operation, when the second interface port 92 is actuated, to translate the second electrically or electromechanically actuated piston 88 to block the second bypass duct 104, fluidly isolate the second manually operated piston 100 from the second hydraulic supply circuit 80, and actuate the second brake device 72.
[0088] Since the second bypass duct 104 is blocked, the user cannot directly adjust the operation of the second braking device 72, which is actuated by the second electrically or electromechanically actuated piston 88.
[0089] Preferably, in normal operation, the at least one selector valve 86, 64 is switched such that the second indirect piston 102 cannot move even as a result of manual actuation and remains in an end position defined by the second retainer 108, while the second electrically or electromechanically actuated piston 88 is translated to simultaneously actuate the at least one second brake device 72.
[0090] The processing and control unit 68 is programmed to, in backup operation, retract or allow retraction of the position of the second electrically or electromechanically actuated piston 88 so as not to block the second bypass duct 104 and to allow direct actuation of the second braking device 72 by the second manually operated piston 100.
[0091] Preferably, the processing and control unit 68 is programmed to enable switching of at least one of the selector valves 86, 64 in backup operation to allow the second indirect piston 102 to move in accordance with manual actuation.
[0092] Preferably, the first and second braking devices 12, 72 are located on different axles of the associated motorcycle.
[0093] Preferably, the first and second hydraulic devices 36, 96 are contained within the same pump body.
[0094] Preferably, the braking devices 12, 72 comprise disc brakes and / or drum brakes.
[0095] A first manually operated piston 40 is hydraulically connected to the first hydraulic supply circuit 20 via a first bypass duct 44 and is arranged upstream in series with the first electrically or electromechanically actuated piston 28 .
[0096] According to one possible embodiment, the first manually operated piston is subdivided into a first direct piston 41, which is directly connected to the first interface port 32, and a first indirect piston 42, which is arranged in series with the first direct piston 41 and connected thereto by the interposition of a first return spring 43. In this configuration, the first indirect piston 42 pressurizes the fluid in the first hydraulic supply circuit 20.
[0097] The first hydraulic device 36 also comprises a first retainer 48 which forms a limit stop for the first indirect piston 42 as it approaches the first direct piston 41 .
[0098] The braking device 4 includes a hydraulic fluid reservoir 52 fluidly connected to the first hydraulic device 36 by an upstream duct 56 connected to the first indirect piston 42 and a downstream duct 60 connected to the first indirect piston 42. More specifically, the hydraulic fluid reservoir 52 is in fluid communication with a hydraulic chamber 45 interposed between the first direct piston 41 and the first indirect piston 42.
[0099] Furthermore, the hydraulic fluid reservoir 52 is directly fluidly connected to the second bypass duct 104 via a connecting or supply duct 194. Preferably, the first retainer 48 is arranged such that the first indirect piston 42 does not block the upstream connecting duct 56.
[0100] Preferably, at least one of the upstream connecting duct 56 and the downstream connecting duct 60 is provided with at least one device such as a selector valve 64, 86 having at least one operating state, such as an open position, allowing fluid to pass through the corresponding connecting duct 56, 60, and at least one operating state, such as a closed position, preventing fluid from passing through the corresponding connecting duct 56, 60, and capable of preventing the advancement of the first indirect piston 42 in one of its operating states.
[0101] For example, at least one device 64 provides at least one operating state that prevents fluid from passing through a corresponding downstream connecting duct 60, thereby preventing forward movement of the first indirect piston 42, and one operating state that allows fluid to pass through the downstream connecting piston 60.
[0102] Preferably, at least one device 86, 64 is capable of providing two operating conditions in which fluid is either prevented or allowed to pass through the corresponding upstream connecting duct 56 in order to isolate the contribution of the return spring 43 during operation in hydraulic backup mode.
[0103] The at least one selector valve 64, 86 is operatively connected to a processing and control unit 68, which is better described below.
[0104] According to a possible embodiment, at least one selector valve 86, 64 also includes a partially open position in which it functions as a one-way valve that only allows fluid flow in one direction, specifically from the hydraulic fluid reservoir 52 to the first hydraulic device 36.
[0105] According to one embodiment, the second manually operated piston 100 is subdivided into a second direct piston 101, which is directly connected to the second manual actuator 92, and a second indirect piston 102, which is arranged in series with the second direct piston 101 and connected thereto by the interposition of a second return spring 103. In this configuration, the second indirect piston 102 pressurizes the fluid in the second hydraulic supply circuit 80.
[0106] The second hydraulic device 96 also includes a second retainer 108 which forms a limit stop for the second indirect piston 102 as it approaches the second direct piston 101 .
[0107] As can be seen from what has been described, the present invention overcomes the shortcomings of the prior art.
[0108] In particular, the brake system of the present invention allows for hydraulic backup operation from both control devices (lever and brake pedal) in case of failure of the E / E system (ECU, actuators, sensors, etc.) or in case of power failure (disconnected battery) combined with operation of a partially fluid-free brake system (at least one DRY caliper).
[0109] Finally, the invention makes it possible to provide a braking system (mixed with regenerative braking, residual torque reduction) suitable for electric vehicles.
[0110] Those skilled in the art may make numerous modifications and variations to the above-described brake system and motorcycle to meet their contingent and specific needs, all of which are encompassed by the present invention as mechanical and / or functional equivalents.
[0111] The scope of protection of the present invention is defined by the claims.
Claims
1. A brake system (4) for a motorcycle (8), comprising: at least one first brake device (12) operably connected to a first wheel (16) of the motorcycle (8) and having a first hydraulic supply circuit (20); a first electric actuator (24) having first motor means operatively connected to a first electrically or electromechanically actuated piston (28) fluidly connected to said first hydraulic supply circuit (20); at least one first interface port (32) operably connected to a first hydraulic device (36) having a first manually operated piston (40); The first manually operated piston (40) is divided into a first direct piston (41) directly connected to the first interface port (32) and a first indirect piston (42) connected in series with the first direct piston (41) via a first return spring (43); the first indirect piston (42) is hydraulically connected to the first hydraulic supply circuit (20) via a first bypass duct (44) and is arranged in series upstream of the first electrically or electromechanically actuated piston (28); the brake system (4) comprises a hydraulic fluid reservoir (52) fluidly connected to the first hydraulic device (36) by an upstream connecting duct (56) of the first indirect piston (42) and a downstream connecting duct (60) of the first indirect piston (42); the braking system (8) comprising a processing and control unit (68) operatively connected to the first electric actuator (24); The processing and control unit (68) is programmed to, in standard operation, upon actuation of the first interface port (32), cause the first electrically or electromechanically actuated piston (28) to translate to block the first bypass duct (44), fluidly isolate the first manually operated piston (40) from the first hydraulic supply circuit (20), and simultaneously operate the at least one first brake device (12).
2. At least one of the upstream connecting duct (56) and the downstream connecting duct (60) is provided with at least one device (64, 86), said at least one device (64, 86) having at least one operating state allowing the passage of fluid through the corresponding connecting duct (56, 60) and an operating state such as a closed position preventing the passage of fluid through said corresponding connecting duct (56, 60); 2. A brake system (4) for a motorcycle (8) according to claim 1, wherein in the standard operation, the at least one device (64, 86) is switched such that the first indirect piston (42) cannot move even after manual operation and remains in an end stop position, while the first electrically or electromechanically actuated piston (28) is translated to simultaneously actuate the at least one first brake device (12).
3. 3. A brake system (4) for a motorcycle (8) according to claim 2, wherein the at least one device (64, 86) provides two operating states in which the passage of fluid through the corresponding upstream connecting duct (56) is prevented or allowed in order to isolate the contribution of the first return spring (43) during operation in a backup mode.
4. 2. The brake system (4) for a motorcycle (8) according to claim 1, characterized in that the processing and control unit (68) is programmed to, in a backup mode, when the first interface port (32) is activated, not block the first bypass duct (44) and to retract or allow retraction of the first electrically or electromechanically actuated piston (28) so as to allow direct manual actuation of the at least one first brake device (12) by the first manually operated piston (40).
5. 5. A brake system (4) for a motorcycle (8) as recited in claim 4 in combination with claim 2, wherein the processing and control unit (68) is programmed such that, in the backup mode, the processing and control unit (68) switches the at least one device (64, 86) so that the first indirect piston (42) moves in accordance with the manual actuation.
6. The at least one first brake device (12) comprises a pair of first brake devices (12', 12"); 2. A brake system (4) for a motorcycle (8) as claimed in claim 1, wherein the first hydraulic supply circuit (20) is fluidly connected to the pair of first brake devices (12', 12'') connectable to a same first wheel (16).
7. The at least one first brake device (12) comprises a pair of first brake devices (12', 12'') connectable respectively to the first wheel (16) and the second wheel (76) arranged on different axles of the motorcycle (8); 2. A brake system (4) for a motorcycle (8) according to claim 1, wherein the first hydraulic supply circuit (20) is fluidly connected to the pair of first brake devices (12', 12'').
8. the brake system (4) includes a second manually operated device (92) operably connected to a second hydraulic device (96) having a second manually operated piston (100) separate from the first interface port (32); the second manually operated piston (100) is hydraulically connected to the first indirect piston (42) via a second bypass duct (104) and is arranged in series upstream of the first indirect piston (42); the first indirect piston (42) is fluidly connected to the first hydraulic supply circuit (20) and actuates the at least one first braking device (12) and / or the second braking device (72) via the first hydraulic supply circuit (20); A brake system (4) for a motorcycle (8) according to claim 1.
9. 9. A brake system (4) for a motorcycle (8) according to claim 8, wherein the second manually operated piston (100) is divided into a second direct piston (101) directly connected to the second manually operated device (92) and a second indirect piston (102) connected in series with the second direct piston (101) through the interposition of a second return spring (103).
10. 10. A brake system (4) for a motorcycle (8) according to claim 9, wherein the second indirect piston (102) is in hydraulic communication with the first indirect piston (42) via the second bypass duct (104) and is disposed in series upstream of the first indirect piston (42).
11. the at least one first brake device (12) is operatively connectable to the first wheel (16) of a first single axle of the motorcycle (8); 9. A braking system (4) for a motorcycle (8) as set forth in claim 8, wherein said second braking device (72) is operatively connectable to a second wheel (76) of a second axle of said motorcycle (8).
12. 9. A brake system (4) for a motorcycle (8) according to claim 8, wherein the first hydraulic device (36) and the second hydraulic device (96) are contained in the same pump body.
13. The second brake device (72) is operably connected to a second wheel (76) of the motorcycle (8) and includes a second hydraulic supply circuit (80) fluidly separated from the first hydraulic supply circuit (20); The brake system (4) for the motorcycle (8) further comprises: a second electric actuator (84) having second electric motor means operatively connected to a second electrically or electromechanically actuated piston (88) fluidly connected to said second hydraulic supply circuit (80); a second interface port (92) operably connected to a second hydraulic device (96) having the second manually operated piston (100); the second manually operated piston (100) is hydraulically connected to the second hydraulic supply circuit (80) via the second bypass duct (104) and is arranged upstream in series with the second electrically or electromechanically operated piston (88); the processing and control unit (68) is operatively connected to the second interface port (92) and to the second electrical actuator (84); 10. The braking system (4) for a motorcycle (8) of claim 9, wherein during normal operation, upon actuation of the second interface port (92), the second electrically or electromechanically actuated piston (88) is programmed to translate to block the second bypass duct (104), fluidly isolate the second manually operated piston (100) from the second hydraulic supply circuit (80), and actuate the second brake device (72).
14. At least one of the upstream connecting duct (56) and the downstream connecting duct (60) is provided with the at least one device (64, 86) having at least one operating state allowing the passage of fluid through the corresponding connecting duct (56, 60) and an operating state such as a closed position preventing the passage of fluid through the corresponding connecting duct (56, 60), 14. A brake system (4) for a motorcycle (8) according to claim 13, wherein in the standard operation, the at least one device (64, 86) is switched such that the second indirect piston (102) does not move even after manual actuation, while the second electrically or electromechanically actuated piston (88) is moved to simultaneously actuate the second brake device (72).
15. 14. A braking system (4) for a motorcycle (8) according to claim 13, wherein the processing and control unit is programmed to, in a backup mode, retract or retract the second electrically or electromechanically actuated piston (88) so as not to block the second bypass duct (104) and so as to allow direct actuation of the second braking device (72) by the second manually operated piston (100).
16. 16. A brake system (4) for a motorcycle (8) as claimed in claim 15 in combination with claim 14, wherein the processing and control unit (68) is programmed to switch the at least one device (64, 86) in a backup mode so that the second indirect piston (102) can move according to manual actuation.
17. 14. A braking system (4) for a motorcycle (8) according to claim 13, wherein the at least one first braking device (12) and the second braking device (72) are arranged on different axles of the connectable motorcycle.
18. 14. A brake system (4) for a motorcycle (8) according to claim 13, wherein the first hydraulic device and the second hydraulic device are contained in the same pump body.
19. 2. A braking system (4) for a motorcycle (8) according to claim 1, wherein said at least one first braking device (12) and said second braking device (72) comprise disc brakes and / or drum brakes.
20. A motorcycle (8) comprising a brake system (4) for a motorcycle (8) according to claim 1.