DESC:TECHNICAL FIELD
[0001] The present subject matter, in general, relates to a braking system, and, in particular relates, to a synchronized braking system of a two-wheeled vehicle.

BACKGROUND
[0002] In the last few decades, two-wheeler automobile industry has shown a remarkable growth and development, in terms of technology as well as sales. Due to consistent advancement in technology, two-wheeled vehicles, such as bicycles, motorcycles, scooters and light-weight scooters, have succeeded in maintaining their popularity among different sections of society. Different sections of society, based on their requirement, utilize the two-wheeled vehicles for various purposes, such as a recreational activity, a means of transportation, and for sports activities. As a result, it becomes pertinent for the two-wheeler automobile industry to constantly develop and modify the components of the two-wheeled vehicles to suit requirements of different riders.
[0003] In accordance with the same ideology, various types of braking systems have been developed for facilitating braking functionalities in the two-wheeled vehicles. Conventionally, braking systems that allows simultaneous actuation of a front brake and a rear brake by application of a single brake lever have gained widespread popularity across the globe.

BRIEF DESCRIPTION OF THE DRAWINGS
[0004] The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to reference like features and components.
[0005] FIG. 1 illustrates a frame structure layout of a two-wheeled vehicle, in accordance with the embodiment of the present subject matter.
[0006] FIG. 2 (a) illustrates a layout of a braking system of a two-wheeled vehicle, in accordance with an embodiment of the present subject matter.
[0007] FIG. 2 (b) illustrates a layout of a braking system of a two-wheeled vehicle, in accordance with another embodiment of the present subject matter.
[0008] FIG. 2 (c) illustrates illustrates a layout of a braking system of a two-wheeled vehicle, in accordance with yet another embodiment of the present subject matter.
[0009] FIG. 3 illustrates a perspective view of a front brake actuation assembly of the braking system of a two-wheeled vehicle, in accordance with an embodiment of the present subject matter.
[00010] FIG. 4 illustrates a perspective exploded view of the front brake actuation assembly of the braking system of a two-wheeled vehicle, in accordance with an embodiment of the present subject matter.
[00011] FIG. 5 illustrates a right side view of the front brake actuation assembly depicted in Fig. 4, in accordance with an embodiment of the present subject matter.
[00012] FIG. 6A and FIG. 6B illustrate a sectional view of a master cylinder assembly taken along line A-A and line B-B depicted in Fig. 5, in accordance with an embodiment of the present subject matter.
[00013] FIG. 7A and FIG. 7B illustrate a sectional view and a perspective view of the master cylinder assembly, in accordance with an embodiment of the present subject matter.

DETAILED DESCRIPTION
[00014] The subject matter described herein relates to a synchronized braking system for a two-wheeled vehicle, according to an embodiment of the present subject matter.
[00015] Conventionally, two-wheeled vehicles are provided with a braking system for slowing or stopping the vehicle. The braking system, usually, includes at least one brake assembly, such as a front wheel brake assembly and a rear wheel brake assembly for a front wheel and a rear wheel, respectively. Such brake assemblies may include, but are not limited to a cam lever, a hinge pin, and a pair of brake shoes. Further, each of the front wheel brake assembly and the rear wheel brake assembly is connected to a brake lever for actuation. For example, the brake lever may be coupled to a pair of brake shoes for applying friction to each wheel of the two-wheeled vehicle, as and when required. The brake lever can be connected to the brake assembly in a variety of ways. For example, the brake lever can be connected to the brake assembly by means of a cable. In such a case, one end of the cable may be secured to the brake assembly, and the other end of the cable may be secured to the brake lever. Consequently, actuation of the brake lever may result in actuation of the brake assembly and subsequently, the brake may be applied.
[00016] Generally, the front wheel and the rear wheel are provided with separate braking systems. Conventional two-wheeler braking systems usually include either hand-operated brakes for both the wheels or include a combination of hand-operated and foot-operated brakes. In the latter case, generally, the front wheel brakes are hand-operated, and include a front wheel brake lever mounted on a handle of the two-wheeled vehicle for actuation, whereas the rear wheel brakes can be foot-operated by a rear wheel brake pedal provided near a foot-rest of the rider.
[00017] During operation of the brakes, usually, riders apply the rear wheel brake alone. Such a practice stems from the fact that actuating both the brake levers at the same time may be inconvenient for the rider. In addition, when the front wheel brake is applied, less weight on the front wheel and weight transfer towards the front wheel cause the front wheel to brake abruptly, and may result in a sudden jerk to the vehicle. The sudden jerk may affect the ride quality and may disturb the balance and stability of the vehicle leading to an accident. However, on the other hand, the braking force applied for braking the rear wheel may have to be limited, to prevent skidding of the vehicle. As a result, the deceleration experienced by the vehicle may also be limited and subsequently, the stopping distance of the vehicle may be significantly large.
[00018] Conventionally, in order to address the above-mentioned concerns, braking systems that allow simultaneous actuation of a front brake and a rear brake by application of a single brake lever have been developed. Such braking system is capable of uniting the braking operation of both the front wheel brake and the rear wheel brake with the help of a single braking force transmitting member, for example a rear wheel braking force transmitting member. Accordingly, upon actuation of the single braking force transmitting member, such a braking system may allow application of braking force to the front wheel as well as the rear wheel of the vehicle. Therefore, the front wheel brake and the rear wheel brake can be simultaneously applied by actuating a single braking force transmitting member, for example, the rear wheel braking force transmitting member. In addition to being convenient for the rider, such braking systems may ensure that the deceleration of the vehicle can be increased and subsequently, the stopping distance may be reduced. Further, as would be understood, in two-wheeled vehicles with such braking systems, a front wheel brake lever may also be provided to independently operate the front wheel brake.
[00019] Further, in such conventional braking systems, a cable from each of the front wheel brake lever and the rear wheel braking force transmitting member may be connected to the front wheel brake assembly. In one example, a cable connects the rear wheel braking force transmitting member to the front wheel brake assembly. Similarly, another cable connects a front wheel brake lever to the front wheel brake assembly. Further, the front wheel brake assembly may include a cam lever and hinge pin for supporting each of the cables. Therefore, the first cable and the second cable may be coupled to the front wheel brake assembly through the cam lever, and may maintain a contact with the corresponding hinge pin.
[00020] In the conventional braking systems, upon actuation of the rear wheel braking force transmitting member, the braking force is distributed to the front wheel brake and the rear wheel brake. However, even in such scenarios, due to lesser weight on the front wheel brake than that on the rear wheel brake, the braking force experienced by the front wheel brake may be substantially more than the rear wheel brake causing instability of the vehicle. Such situations may also result the vehicle to nose dive, i.e., experience a jerk in the forward direction. Under such circumstances, the rider, for example a novice rider, may experience discomfort while riding. In addition, various components, such as front fork suspension assembly and the wheel, may experience severe loads forces leading to excess wear and tear, and increasing the cost of maintenance of the vehicle.
[00021] Further, during operation of such braking systems, when the rider actuates the rear wheel braking force transmitting member, the first cable is pulled to actuate the cam lever of the front wheel brake assembly. However, in such a situation, the second cable may remain stationary with reference to the first cable and the cam lever. As a result, the portion of the cam lever may slide over the hinge pin in contact with the second cable.
[00022] In addition, the conventional braking systems employ a large number of components and linkages to connect the rear brake lever to both the rear wheel brake assembly and the front wheel brake assembly. Consequently, weight of such braking systems may be substantially high. Further, such heavy and complex braking systems with the large number of components may require greater maintenance, and skilled labor. Such a situation may add to the maintenance cost of the vehicle. In addition, due to lack of space on the vehicle, accommodating such a bulky arrangement poses a problem. Accordingly, the conventional braking systems may suffer from lack of overall braking effectiveness, increased weight, and high costs.
[00023] Conventionally, such braking systems are provided to improve braking efficiency while actuating rear braking force transmitting member alone over standard brake system that has independent control for both the brakes. In certain cases, such prior art braking systems that involves simultaneous operation of front wheel brake and rear wheel brake also include front wheel brake that are hydraulically controlled, for example, a hydraulic front disc brake. For instance, certain braking systems involving simultaneous operation of front wheel and rear wheel brakes, in which front wheel brake is hydraulically controlled disc brake, while rear wheel brake is drum brake. In such braking systems, the front wheel disc brake is hydraulically controlled by a hydraulic fluid dispensing unit having a reservoir that stores hydraulic braking fluid, which when actuated by the front wheel brake actuating lever dispenses required quantity of hydraulic braking fluid, thereby effecting front wheel disc brake.
[00024] Similarly, in such braking systems, a separate lever responsive to the rear wheel braking force transmitting member is capable of being independently connected to the hydraulic fluid dispensing unit, such that, the actuation of the rear wheel braking force transmitting member enables dispensing of hydraulic brake fluid from the hydraulic fluid dispensing unit through the actuation of the separate lever. However, in such systems, the hydraulic fluid dispensing unit is provided with a single cylinder for effecting two mechanical actuations, for instance, actuation by the front wheel brake lever, and by the separate lever. In such a case, the actuation of one lever leads to a freeness in the other lever causing an unpleasant braking feel for the rider. Sometimes, it may also lead to rider panic.
[00025] Furthermore, conventional braking systems involving simultaneous actuation of the front wheel brake and the rear wheel brake by application of a single braking force transmitting member, may also include two separate hydraulic dispensing units each having separate cylinders. In such cases, there are separate hydraulic brake lines for actuating the front wheel disc brake independently. However, accommodating two separate hydraulic dispensing units and independent brake lines makes the braking system more cumbersome and causes severe space constraint in the vehicle layout. Such braking systems, also increases no. of parts and overall cost.
[00026] The SBS assembly of the present subject matter enables use of a single hydraulic brake line instead of a plurality of brake lines connecting the brake caliper of the front brake assembly from the handle bar mounted master cylinder assembly. Thus, the SBS assembly of the present subject matter is provided with a compact and cost effective design. Further, in an embodiment, the master cylinder assembly includes a main cylinder and an auxiliary cylinder meant for actuation of front brake assembly and SBS assembly is integrated into a compact assembly that is capable of being mounted in the vicinity of the handlebar assembly of the two-wheeled vehicle. In an embodiment, the SBS assembly of the present subject matter ensures that actuation of the SBS assembly do not create freeness in the other brake actuation hand lever that is provided with independent front brake control.
[00027] Further, the two-wheeled vehicle of the present subject matter includes a hydraulically controlled front brake assembly that applies braking force to the front wheel, and a drum brake panel that applies braking force to the rear wheel. In another embodiment, the braking force to the rear wheel is capable of being applied by a hydraulically control rear brake assembly. Further, in an alternative embodiment, the present subject matter provides a synchronized braking system for a three-wheeled vehicle. The two-wheeled vehicle is further provided with a hand control lever, the actuation of which enables application of braking force to the front brake assembly. In an embodiment, the SBS assembly of the present subject matter enables distribution of force between a plurality of brake cables when actuated, thereby enabling simultaneous actuation of both front and rear wheel brakes. In one embodiment, the SBS assembly is mounted on the handle bar of the two-wheeled vehicle. In another embodiment, the SBS assembly is mounted along with the rear wheel brake pedal of the two-wheeled vehicle. The two-wheeled vehicle is provided with a master cylinder assembly having a primary cylinder/fluid chamber, which has a piston and is actuated by the actuation of the front brake lever and/or the SBS assembly. The output of the master cylinder assembly enables actuation of the hydraulic front brake assembly.
[00028] In an embodiment, the master cylinder assembly also includes a secondary cylinder/fluid chamber with an axis substantially perpendicular or parallel to that of the primary cylinder. The secondary cylinder having a piston, which is operated by a secondary actuating lever, which in turn is actuated by one of the mechanical input force from the SBS assembly. The secondary actuating lever is pivoted on the master cylinder assembly. A fluid reservoir is placed above both the fluid chambers and to supply brake fluid. The reservoir is connected to the secondary chamber via one or more passages. The output of the secondary chamber is connected to the primary fluid chamber via these one or more passages.
[00029] In an embodiment, the secondary actuating lever is mechanically actuated by the SBS assembly. The hydraulic front brake assembly is actuated independently by the front brake lever without getting affected by the actuation of the secondary actuating lever.
[00030] The present subject matter describes a synchronized braking system for a two-wheeled vehicle. The synchronized braking system includes a front wheel brake assembly capable of applying braking forces to a front wheel of the two-wheeled vehicle. The front wheel brake assembly includes a hydraulic brake caliper for hydraulically effecting braking of the front wheel. A rear wheel brake assembly capable of applying braking forces to a rear wheel of the two-wheeled vehicle is provided. The rear wheel brake assembly includes a brake for effecting braking of the rear wheel. For instance, in an embodiment, the rear wheel brake assembly can include a drum brake. Similarly, in one embodiment, the rear wheel brake assembly can effect braking of the rear wheel, mechanically. The synchronized braking system of the present subject matter includes a front wheel brake actuation assembly mounted to a handlebar of the vehicle and which is hydraulically coupled to the front wheel brake assembly through a master cylinder assembly. A synchronized brake actuation assembly for synchronously actuating the front wheel brake assembly and the rear wheel brake assembly is also provided. The synchronized brake actuation assembly is connected to the master cylinder assembly by a synchronized brake cable for effecting actuation of the front wheel brake assembly.
[00031] The master cylinder assembly of the present subject matter includes a main cylinder capable of displacing brake fluid stored in a reservoir, when braking forces are exerted by actuation of the front wheel brake actuation assembly. It also includes an auxiliary cylinder fluidically connected to the reservoir. In an embodiment, the auxiliary cylinder is functionally coupled to the main cylinder. The auxiliary cylinder is capable of displacing the brake fluid when braking forces are exerted by actuation of the synchronized brake actuation assembly.
[00032] The master cylinder assembly of the present subject matter includes a lever holder substantially adjoining the auxiliary cylinder. The lever holder is pivotally supporting an auxiliary cylinder actuating lever that is capable of being actuated by the synchronized brake actuation assembly. In an embodiment, the auxiliary cylinder of the present subject matter is disposed with its longitudinal axis substantially parallel to a central axis of the main cylinder.
[00033] In another embodiment, the auxiliary cylinder is disposed with its longitudinal axis substantially perpendicular to a central axis of the main cylinder.
[00034] Further, in an embodiment, the main cylinder includes a main piston capable of being pushed against a main spring when actuated by the front wheel brake actuation assembly. Similarly, the auxiliary cylinder includes an auxiliary piston capable of being pushed against an auxiliary spring when actuated by the synchronized brake actuation assembly.
[00035] Further, in an embodiment, the front wheel brake actuation assembly includes a front brake lever, when actuated exerts force against a main piston of the main cylinder effecting compression of main spring.
[00036] In an embodiment, the actuation of the front brake lever causes brake fluid in an actuating chamber of the main cylinder to be dispensed to the hydraulic brake caliper of the front wheel brake assembly. Further, the brake fluid is dispensed from the reservoir to the auxiliary cylinder through a main feed path, and from the auxiliary cylinder to the main cylinder through an auxiliary feed path.
[00037] In an embodiment, the actuation of the auxiliary cylinder actuating lever exerts force against the auxiliary piston of the auxiliary cylinder effecting compression of the auxiliary spring causing brake fluid to be dispensed through the auxiliary feed path.
[00038] These and other advantages of the present subject matter would be described in greater detail in conjunction with the figures in the following description.
[00039] FIG. 1 illustrates a frame structure layout of a two-wheeled vehicle 100, in accordance with the embodiment of the present subject matter. In an embodiment, the two-wheeled vehicle 100 depicts a synchronized braking system, more particularly, a synchronized disc braking system (SDBS), in accordance with the embodiment depicted in Fig. 1 of the present subject matter. In an embodiment, the vehicle 100 includes a handle bar assembly 128 that is enclosed on both sides by a headlamp assembly (not shown). In an embodiment, the handlebar assembly 128 and the headlamp assembly are supported by means of a head pipe 109, which extends downwardly from the handlebar assembly 128 towards a front wheel 105. In an embodiment, a main tube 106 of the vehicle 100 extends downwardly rearward from the handlebar assembly 128 - head pipe 109 intersection, towards a rear of the vehicle 100. An internal combustion engine (not shown) is disposed in a space formed between the main tube 106 and the head pipe 109. In an embodiment, a synchronous braking force transmitting member 114 is disposed in the vicinity of the engine and is downwardly coupled to the vehicle frame structure to actuate a rear wheel brake assembly 118 disposed on a rear wheel 107. In an embodiment, the main tube 106 of the vehicle 100 extends rearwardly to accommodate a seating structure (not shown) of the vehicle 100. In an embodiment, a front wheel brake lever 104 is supported on the handlebar assembly 128. More particularly, the front wheel brake lever 104 is supported on the right hand side of the handlebar assembly 128. In an embodiment, the front wheel brake hose 110 connects the front wheel brake lever 104 to a front wheel brake assembly 112, more particularly, to a hydraulic front brake caliper 111, also called as the hydraulic front brake actuating member of the front wheel brake assembly 112. The front wheel brake hose 110 enables independent actuation of the front wheel brake assembly 112 when actuating the front wheel brake lever 104. In one embodiment, a synchronous front wheel brake actuating member 108 and a rear wheel brake actuating member 116 are functionally coupled to the synchronous braking force transmitting member 114 such that the actuation of the synchronous braking force transmitting member 114 causes a corresponding simultaneous actuation of the front wheel brake assembly 112 and the rear wheel brake assembly 118 in no particular order. In one embodiment, the synchronized front wheel brake actuating member 108 and the front wheel brake hose 110, the other end of which is coupled to the front wheel brake lever 104, are connected to the hydraulic front brake caliper 111 of the front wheel brake assembly 112. In an embodiment, when the front wheel brake lever 104 is actuated, the front wheel brake assembly 112 is independently controlled by means of the front brake hose 110. Similarly, the actuation of the synchronous braking force transmitting member 114 also causes actuation of the front wheel brake assembly 112 independent of the front brake lever 104 actuation. Further, the actuation of the synchronous braking force transmitting member 114 also causes a corresponding actuation of the rear wheel brake assembly 118. In an alternative embodiment, the synchronized front wheel brake actuating member 108 is coupled to the front wheel brake lever 104 or to a master cylinder assembly (not shown), in such a manner that the actuation of the synchronous braking force transmitting member 114 causes a corresponding actuation of the front wheel brake 112 through the front brake hose 110 that is connected to the front wheel brake lever 104 or to the master cylinder assembly (not shown). In an embodiment, the front wheel brake 112 is a disc brake capable of being hydraulically actuated by means of a master cylinder assembly (not shown) in the vicinity of the front wheel brake lever 110. In such a construction, the synchronous braking force transmitting member 114 is connected to the master cylinder assembly (not shown) for the purpose of actuating the front wheel brake assembly 112. Similarly, in one embodiment, the rear wheel brake actuating member 116 is a rear brake rod 116, while in an alternative embodiment, the rear wheel brake actuating member 116 is a rear wheel brake cable. In one embodiment, the synchronized front wheel brake actuating member 108 is routed along the main tube 106 of the vehicle 100. In an alternative embodiment, the synchronous braking force transmitting member 114 is mounted on a left side of the handlebar assembly 128.
[00040] FIG. 2 (a) illustrates a first layout 200-1 of a braking system of the two-wheeled vehicle 100, in accordance with an embodiment of the present subject matter. FIG. 2 (b) illustrates a second layout 200-2 of a braking system of the two-wheeled vehicle 100, in accordance with another embodiment of the present subject matter. FIG. 2 (c) illustrates illustrates a third layout 200-3 of a braking system of the two-wheeled vehicle 100, in accordance with yet another embodiment of the present subject matter. More particularly, the braking system 200-1 describes a synchronous disc braking system 200-1. The system 200-1 includes a front wheel brake assembly 112 and a rear wheel brake assembly 118. In an embodiment, the rear wheel brake 118 and the front wheel brake 112 of the present subject matter are capable of being synchronously actuated by means of a synchronized brake assembly 204, also called as synchronized brake actuation assembly. Further, a front wheel brake lever 104 of a front brake actuation assembly 202-1 may be independently actuated to apply the front wheel brake assembly 112. Similarly, a rider may actuate a synchronous braking force transmitting member (not shown) of the synchronized brake assembly 204 for applying the front wheel brake 112 as well as the rear wheel brake 118. In one implementation, the front wheel brake lever 104 may be disposed on a right-hand side of a handle bar (not shown) of the vehicle 100, while the synchronous braking force transmitting member may be disposed on a frame member (not shown) adjoining a rider’s foot rest (not shown). In an alternative embodiment, the synchronous braking force transmitting member may be disposed on a left-hand side of the handle bar (not shown). In a further implementation, instead of the independently provided front wheel brake lever 110, the braking system 200-1 may include a rear wheel brake pedal (not shown) to independently apply the rear wheel brake 118. Therefore, in such an implementation, the braking system 200-1 may include the rear wheel brake pedal to independently apply the rear wheel brake 118, and the front wheel brake lever 104 may act as the integrated brake actuating member for applying the front wheel brake 112 as well as the rear wheel brake 118. Further, in an embodiment, a synchronous front wheel brake actuating member 108 and an independent front brake hose 110 may be connected to a front wheel brake assembly. The front wheel brake assembly may include a hydraulic front brake caliper 111 to which the front brake hose 110 is connected. In an embodiment, the actuation of the synchronized brake assembly 204 causes actuation of the synchronous front wheel brake actuating member 108, which in turn actuates a master cylinder assembly of the front brake actuation assembly 202-1 thereby causing hydraulic brake fluid to pass through to the hydraulic front brake caliper 111 through the front brake hose 110. In an embodiment, the actuation of the synchronized brake assembly 204 causes independent actuation of the rear brake assembly 118 through the independent rear brake actuating member 116. In an embodiment, the master cylinder assembly of the front brake actuation assembly 202-1 includes a main cylinder and an auxiliary cylinder. The auxiliary cylinder of the front brake actuation assembly 202-1 is disposed with its longitudinal axis substantially parallel to a central axis of the main cylinder.
[00041] In another embodiment, the auxiliary cylinder is disposed with its longitudinal axis substantially perpendicular to a central axis of the main cylinder.

[00042] In an embodiment, the second layout 200-2 of the braking system of the two-wheeled vehicle 100 includes a front brake actuation assembly 202-2, in accordance with another embodiment of the present subject matter. In an embodiment, the front brake actuation assembly 202-2 of the present subject matter includes a master cylinder assembly having a main cylinder and an auxiliary cylinder. The auxiliary cylinder of the front brake actuation assembly 202-2 is disposed with its longitudinal axis substantially parallel to a central axis of the main cylinder. Further, in an embodiment, a rear brake actuation assembly 206 is provided with a foot-operated synchronized brake transmitting member 114, in the form of a rear brake pedal 114, which when actuated by the rider, simultaneously actuates both the rear brake assembly 118 by means of an independent rear brake actuating member 116, for example, a rear brake rod 116, and the front brake assembly 112 by means of a synchronized brake actuating member 108. In an embodiment, the synchronized brake actuating member 108 transmits braking forces from the rear brake pedal 114 to a lever mounted on the master cylinder assembly for effecting dispensing of brake fluid from the master cylinder assembly thereby causing transmitting of braking forces to the front brake assembly 112 through the front brake hose 110.
[00043] In an alternative embodiment, FIG. 2 (c) illustrates a third layout 200-3 of a braking system of the two-wheeled vehicle 100. In an embodiment, a front brake actuation assembly 202-3 of the present subject matter includes a master cylinder assembly having a main cylinder and an auxiliary cylinder. The auxiliary cylinder of the front brake actuation assembly 202-3 is disposed with its longitudinal axis substantially perpendicular to a central axis of the main cylinder.
[00044] FIG. 3 illustrates a perspective view of a front brake actuation assembly 202-2 of the braking system of a two-wheeled vehicle 100, in accordance with an embodiment of the present subject matter. In an embodiment, the front brake actuation assembly 202-2 is mounted on the right-hand side of the handlebar assembly 128. In an embodiment, the front brake actuation assembly 202-2 includes a master cylinder assembly 102, and a front brake lever 104 pivotally mounted to a main lever holder mounted adjoining the master cylinder assembly 102 on the handlebar 128. In an embodiment, the master cylinder assembly 102 includes a sub-lever holder 126 for pivotally supporting an auxiliary cylinder actuating lever 120, for instance, about a pivot point 130. In an embodiment, the auxiliary cylinder actuating lever 120 is actuated by means of the synchronized brake cable 108. In an embodiment, the synchronized brake cable 108 includes a synchronized brake outer cable 122 abutted against the sub-lever holder 126, while an inner brake cable of the synchronized brake cable 108 is hinged to the lever 120 at a hinge joint 134.
[00045] FIG. 4 illustrates a perspective exploded view of the front brake actuation assembly 202-2 of the braking system of the two-wheeled vehicle 100, in accordance with an embodiment of the present subject matter. In an embodiment, the lever 120 is capable of being independently mounted in a mounting slot located inside the lever holder 126 and pivotally supported to the lever holder 126. One end of the lever 120 abuts against a movable piston (not shown) disposed inside an auxiliary cylinder (not shown) of the master cylinder assembly 102, such that the actuation of the lever 120 enables dispensing of hydraulic brake fluid from the master cylinder assembly 102. In an embodiment, the front brake lever 104 actuates a main cylinder (not shown) of the master cylinder assembly 102 effecting in independent actuation of the front wheel brake (not shown).
[00046] FIG. 5 illustrates a right side view of the front brake actuation assembly 202-2 depicted in Fig. 4, in accordance with an embodiment of the present subject matter. FIG. 6A and FIG. 6B illustrate a sectional view of a master cylinder assembly 102 taken along line A-A and line B-B depicted in Fig. 5, in accordance with an embodiment of the present subject matter. In an embodiment, the master cylinder assembly 102 includes a reservoir 326 containing hydraulic brake fluid 302, which is dispensed through a main feed path 306 to an auxiliary cylinder 320. In an embodiment, the main feed path 306 is disposed obliquely between the reservoir 326 and the auxiliary cylinder 320. In an embodiment, the auxiliary cylinder 320 includes an auxiliary piston 314 disposed along a longitudinal axis of the auxiliary cylinder 320. The auxiliary piston 314 is capable of being linearly displaced whenever the synchronized brake assembly (not shown) is actuated and the lever 120 is made to push the auxiliary piston 314. In an embodiment, the linear displacement of the auxiliary piston 314 exerts braking forces against an auxiliary spring 316 by pushing the auxiliary spring 316 against an inner wall of the auxiliary cylinder 320. Any forward movement of the auxiliary piston 314 against the auxiliary spring 316 leads to closure of an auxiliary feed passage 318 and letting only an auxiliary replenishing passage 322 to remain open.
[00047] The hydraulic brake fluid 302 from the auxiliary cylinder 320 passes through an auxiliary feed path 324. The brake fluid 302 through the auxiliary feed path 324 is allowed to enter a main cylinder 304 through a main feed passage 312 and a main replenishing passage 310. The passage of the brake fluid 302 through both the passages 310, 312 ensures that the pressure inside the main cylinder 304 during the actuation of the lever 120 is maintained, and the brake fluid 302 inside an actuating chamber 330 of the main cylinder 304 is dispensed to the front brake caliper (not shown) to effect braking forces on the front wheel brake (not shown).
[00048] In an embodiment, actuation of the front brake lever 104 causes actuation of a main piston 308 disposed inside the main cylinder 304, which further causes the main piston 308 to linearly move pushing against a main spring 328. In an embodiment, the forward displacement of the main piston 308 causes the main feed passage 312 to be closed and thereby preventing any dispensing of brake fluid 302 from the auxiliary feed path 324 into the actuating chamber 330, and causing the brake fluid 302 from the actuating chamber 330 to be dispensed to the front brake caliper (not shown) to effect braking forces on the front wheel brake (not shown).
[00049] FIG. 7A and FIG. 7B illustrate a sectional view and a perspective view of the master cylinder assembly 102, in accordance with an embodiment of the present subject matter. In an embodiment, the reservoir 326 is disposed substantially above the main cylinder 304 and the auxiliary cylinder 320 is disposed substantially below the main cylinder 304. In an embodiment, the lever holder 126 is integrally formed with the auxiliary cylinder 320. In an embodiment, the auxiliary cylinder 320 is disposed with its longitudinal axis substantially parallel to the longitudinal axis of the main cylinder 304. In an alternative embodiment, the auxiliary cylinder 320 is disposed with its longitudinal axis substantially perpendicular to the longitudinal axis of the main cylinder 304
[00050] Although the subject matter has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. Rather, the features are disclosed as embodiments of the synchronous braking system 200-1, 200-2, 200-3.
,CLAIMS:We claim:

1. A synchronized braking system (200-1, 200-2, 200-3) for a vehicle (100), the synchronized braking system (200-1, 200-2, 200-3) comprising:
a front wheel brake assembly (112) capable of applying braking forces to a front wheel (105) of the vehicle (100), said front wheel brake assembly (112) includes a hydraulic front brake actuating member (111) for hydraulically effecting braking of said front wheel (105);
a rear wheel brake assembly (118) capable of applying braking forces to a rear wheel (107) of the vehicle (100), said rear wheel brake assembly (118) includes a brake for effecting braking of said rear wheel (107);
a front wheel brake actuation assembly (202-1, 202-2) mounted to a handlebar (128) of said vehicle (100), said front wheel brake actuation assembly (202-1, 202-2) is hydraulically coupled to said front wheel brake assembly (112) through a master cylinder assembly (102);
a synchronized brake actuation assembly (204, 206) for synchronously actuating said front wheel brake assembly (112) and said rear wheel brake assembly (118), said synchronized brake actuation assembly (204, 206) connected to said master cylinder assembly (102) by a synchronized brake cable (108) for effecting actuation of said front wheel brake assembly (112), wherein said master cylinder assembly (102) comprises:
a main cylinder (304) capable of displacing brake fluid (302) stored in a reservoir (326), when braking forces are exerted by actuation of said front wheel brake actuation assembly (202-1, 202-2), and
an auxiliary cylinder (320) fluidically connected to said reservoir (326) and functionally coupled to said main cylinder (304), said auxiliary cylinder (320) capable of displacing said brake fluid (302) when braking forces are exerted by actuation of said synchronized brake actuation assembly (204, 206).

2. The synchronized braking system (200-1, 200-2, 200-3) as claimed in claim 1, wherein said master cylinder assembly (102) includes a lever holder (126) substantially adjoining said auxiliary cylinder (320), said lever holder (126) pivotally supporting an auxiliary cylinder actuating lever (120) capable of being actuated by said synchronized brake actuation assembly (204, 206).

3. The synchronized braking system (200-1, 200-2, 200-3) as claimed in claim 1, wherein said auxiliary cylinder (320) is disposed with its longitudinal axis substantially parallel to a central axis of said main cylinder (304).

4. The synchronized braking system (200-1, 200-2, 200-3) as claimed in claim 1, wherein said auxiliary cylinder (320) is disposed with its longitudinal axis substantially perpendicular to a central axis of said main cylinder (304).

5. The synchronized braking system (200-1, 200-2, 200-3) as claimed in claim 1, wherein said main cylinder (304) includes a main piston (308) capable of being pushed against a main spring (328) when actuated by said front wheel brake actuation assembly (202-1, 202-2).

6. The synchronized braking system (200-1, 200-2, 200-3) as claimed in claim 1, wherein said auxiliary cylinder (320) includes an auxiliary piston (314) capable of being pushed against an auxiliary spring (316) when actuated by said synchronized brake actuation assembly (204, 206).

7. The synchronized braking system (200-1, 200-2, 200-3) as claimed in claim 1, wherein said front wheel brake actuation assembly (202-1, 202-2) includes a front brake lever (104), said front brake lever (104) when actuated exerts force against a main piston (308) of said main cylinder (304) effecting compression of a main spring (328).

8. The synchronized braking system (200-1, 200-2, 200-3) as claimed in claim 1 or 7, wherein actuation of said front brake lever (104) causes brake fluid (302) in an actuating chamber (330) of said main cylinder (304) to be dispensed to said hydraulic front brake actuating member (111) of said front wheel brake assembly (112), and wherein said brake fluid (302) is dispensed from said reservoir (326) to said auxiliary cylinder (320) through a main feed path (306), and from said auxiliary cylinder (320) to said main cylinder (304) through an auxiliary feed path (324).

9. The synchronized braking system (200-1, 200-2, 200-3) as claimed in claim 2 or 6, wherein said auxiliary cylinder actuating lever (120) when actuated exerts force against said auxiliary piston (314) of said auxiliary cylinder (320) effecting compression of said auxiliary spring (316) causing brake fluid (302) to be dispensed through an auxiliary feed path (324).

10. A master cylinder assembly (102) mounted in a vicinity of handlebar (128) of a vehicle (100), said master cylinder assembly (102) comprises:
a main cylinder (304) capable of displacing brake fluid (302) stored in a reservoir (326), when braking forces are exerted by actuation of a front wheel brake actuation assembly (202-1, 202-2) of said vehicle (100), and
an auxiliary cylinder (320) fluidically connected to said reservoir (326) and functionally coupled to said main cylinder (304), said auxiliary cylinder (320) capable of displacing said brake fluid (302) when braking forces are exerted by actuation of a synchronized brake actuation assembly (204, 206) of said vehicle (100).