TECHNICAL FIELD

[0001] The present subject matter, in general, relates to a braking system for a two-wheeled vehicle, and, in particular relates, to means for locking movement of the two-wheeled vehicle in a stationary condition.

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. One such feature that was introduced as part of the braking system is parking brake. Such a parking brake is primarily used in two-wheelers, for example in scooter type two-wheelers, to prevent the two-wheeler from moving during a stationary condition, more importantly from rolling down while holding the vehicle in the stationary condition.

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] Figure 1 illustrates a two-wheeled vehicle, more particularly, a scooter type two-wheeled vehicle, in accordance with an embodiment of the present subject matter.

[0006] Figure 2 (a) illustrates a handlebar assembly of the two-wheeled vehicle, in accordance with an embodiment of the present subject matter. [0007] Figure 2 (b) illustrates the handlebar assembly of the two-wheeled vehicle, in accordance with another embodiment of the present subject matter. [0008] Figure 2 (c) illustrates a top view of the handlebar assembly of the two-wheeled vehicle, in accordance with an embodiment of the present subject matter. [0009] Figure 3 (a) illustrates a perspective top view of braking system having a parking brake sub-assembly mounted on the handlebar assembly of the two-wheeled vehicle, in accordance with an embodiment of the present subject matter. [00010] Figure 3 (b) illustrates the braking system and the parking brake sub¬assembly of the two-wheeled vehicle, in accordance with an embodiment of the present subject matter.

[00011] Figure 3 (c) and 3 (d) illustrates a locked and unlocked condition of the parking brake sub-assembly, in accordance with an embodiment of the present subject matter.'

[00012] Figure 4 (a) and 4 (b) illustrates a front and top view of a parking brake lever, in accordance with an embodiment of the present subject matter.

DETAILED DESCRIPTION

[00013] The subject matter described herein relates to a braking system, more particularly, a parking brake sub-assembly of the braking system for a two-wheeled vehicle, according to an embodiment of the present subject matter.

[00014] 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 brake cam , 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.
[00015] 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 lever provided near a foot-rest of the rider. [00016] Existing two-wheeled vehicles are known to possess parking brakes. These parking brakes are primarily used to prevent the vehicle from rolling d own or moving during parked condition. Conventionally, the parking brake is mounted on the handlebar, or lever holder, or to any other bracket mounted onto the handlebar. Generally, the parking brake is mounted to prevent the movement or rolling down of the rear wheel of the two-wheeled vehicle. More often, the control for the rear wheel brakes are mounted on the LH side of the handlebar, to which the parking brake is additionally mounted. Such a mounting location of the parking brake helps in locking the brake lever to maintain the brake in actuated condition when applied and as a result maintain the rear wheel of the two-wheeled vehicle in a locked state. Such conventional parking brakes require longer profiles and complex routing to achieve economically convenient position for the rider to operate. Moreover, the cable routing is required to be assembled before mounting the parking brake in such conventional set-ups.

[00017] Conventionally, mounting of parking brake onto the rear wheel brake lever is known. Such conventional designs involve additional movement of the parking brake along with the application of the rear wheel brake lever. However, the actuation of the rear wheel brake lever and the parking brake are in mutually opposing direction, i.e., in such conventional systems, the parking brake mounted on the rear wheel brake lever requires substantial effort by the rider for actuation. More often than not, the rider is forced to use left thumb for such an operation, which is economically inconvenient and requires the rider to produce more effort than required, as the rider cannot hold the handlebar for actuation of the parking brake.

[00018] Moreover, in such conventional systems, the parking brake tends to project outside the parking brake sub-assembly, which in turn means increase in the space required to accommodate the parking brake sub-assembly within the headlamp housing. The more the projection of the parking brake, the more the space required within the headlamp housing in order to eliminate any chances of fouling of the parking brake with inner surface of the front cover of the headlamp housing. [00019] The present subject matter provides a braking system having a parking brake sub-assembly that overcomes the above stated problems of the prior art parking brake assemblies and provides an ergonomic mounting location and actuation mechanism for activating and deactivating the parking brake of the two-wheeled vehicle.

[00020] In an embodiment, the braking system of the present subject matter provides a parking brake sub-assembly having a parking brake lever mounted on a rear wheel brake lever, and a lever holder that includes a provision for allowing the parking brake to be accommodated without interfering with adjoining parts during non-operating condition, i.e., during an unlocked condition of the parking brake. In an embodiment, the parking brake is actuated in the same direction of actuation of the rear wheel brake lever for engaging with the lever holder. Further, one or more stoppers are provided on the rear wheel brake lever in order to limit the rotation of parking brake lever in both directions, with respect to the rear wheel brake lever.

[00021] For example, the parking brake lever engages with a locking groove of the. lever holder during the parking brake engaged condition, i.e., the locked condition of the rear wheel. Since the parking brake lever is mounted at an optimal location on the rear wheel brake lever, i.e., near an index finger positioning location of the rider, an operating arm of the parking brake lever is shorter and easy to operate.

[00022] In an embodiment, the parking brake lever of the present subject matter is pivotally mounted on the rear wheel brake lever and is capable of being actuated in the same direction of actuation of the rear wheel brake lever during the application of the parking brake. In one embodiment, a locking arm end of the parking brake lever is positioned ahead of the locking groove of the lever holder, when viewed from LH side of the two-wheeled vehicle. Further, in an embodiment, the lever holder is modified to accommodate the locking arm of the parking brake lever without any interference during a non-operated condition of the parking brake sub¬assembly, i.e., during the unlocked condition of the rear wheel.

[00023] In one embodiment, the parking brake lever is required to be actuated in the same direction of the actuation of the rear wheel brake lever for locking. Further, the rear wheel brake lever includes one or more projected surfaces, for example, stoppers around a centrally disposed pivot point of the parking brake lever in order to limit the rotation of the parking brake lever in both directions. [00024] In an embodiment, the braking system for a two-wheeled vehicle includes a front wheel brake actuated by a front wheel brake lever mounted on a RH side of a handlebar, and a rear wheel brake actuated by a rear wheel brake lever through a rear brake cable. The rear wheel brake lever is mounted on a lever holder, which is in turn mounted on the LH side of the handlebar of the two-wheeled vehicle. The rear wheel brake lever has a first end hingedly coupled to the lever holder. A parking brake sub-assembly is mounted on the rear wheel brake lever substantially nearer to the first end. The parking brake sub-assembly includes a parking brake lever having a locking arm and an operating arm that are rotatably disposed about an intermediate pivot point. The locking arm is disposed substantially parallel to the lever holder in an unlocked condition of the parking brake lever. The lever holder includes a locking groove disposed substantially ahead of a tip portion of the locking arm of the parking brake lever, when viewed from a vehicle rear, during the unlocked condition of the parking brake lever.

[00025] The locking arm of the parking brake lever is disposed substantially perpendicular to the lever holder in a locked condition of the parking brake lever. The locking arm is further disposed substantially tangential at pivot point of the . parking brake lever, about.the pivot point of the rear wheel brake lever. Further, the tip portion of the locking arm abuts the locking groove during the locked condition of the parking brake lever.

[00026] In an embodiment, the rear wheel brake lever comprises at least two projections disposed along a sweeping surface of the parking brake lever. Further, in one embodiment, the parking brake lever includes a stepped portion disposed substantially below the locking arm juxtaposing the intermediate pivot point. The stepped portion is capable of being stopped by the at least two projections when the parking brake lever is rotated from either locked or unlocked condition. [00027] Furthermore, in an embodiment, the operating arm of said parking brake lever is actuated along a direction of actuation of said rear wheel brake lever to attain said locked condition. Further, the operating arm is actuated in the same direction of actuation of the rear wheel brake lever.

[00028] In one embodiment, the locking arm disengages from the locking groove of the lever holder when the rear wheel brake lever is further depressed or actuated to attain the unlocked condition.

[00029] In an embodiment, the present subject matter provides a synchronized braking system for a two-wheeled vehicle having a front wheel brake, and a rear wheel brake. A synchronized brake lever is connected to the front wheel brake and to the rear wheel brake through a synchronized brake cable and a rear brake cable, respectively. A lever holder is mounted on a handlebar of the two-wheeled vehicle. The synchronized brake lever has a first end hingedly coupled to the lever holder. A parking brake sub-assembly is mounted on the synchronized brake lever substantially nearer to the first end.
The parking brake sub-assembly includes a parking brake lever having a locking arm and an operating arm rotatably disposed about an intermediate pivot point on the synchronized brake lever. The locking arm is disposed substantially parallel to the lever holder in an unlocked condition of the parking brake lever, and the lever holder includes a locking groove disposed substantially ahead of a tip portion of the locking arm, when viewed from a vehicle rear, during the unlocked condition of the parking brake lever. The locking arm is disposed substantially perpendicular to the lever holder in a locked condition of the parking brake lever. Further, the locking arm is disposed substantially tangential at pivot point of the parking brake lever, about the pivot point of the rear wheel brake lever.
The tip portion of the locking arm abuts the locking groove during the locked condition of the parking brake lever. In an embodiment, the locking groove is disposed on one side of an extending arm of the lever holder. The extending arm includes a reaction lever stopper on its other side.

[00030] In an embodiment, the present subject matter provides a two-wheeled vehicle, more importantly a scooter type two-wheeled vehicle having a handlebar assembly, a headlamp assembly having a headlamp housing provided with a front cover and a rear cover. In an embodiment, the operating arm of the parking brake lever is disposed outside the front cover and the locking arm is disposed substantially farther from an inner surface of the front cover during the unlocked condition of the parking brake lever.

[00031] Further, in one embodiment, the present subject matter provides a method for operating parking brake sub-assembly in a two-wheeled vehicle. The method includes actuating a rear wheel brake lever or the synchronous brake lever, causing the rotation of the rear wheel brake lever or the synchronous brake lever in a direction towards a handlebar of the two-wheeled vehicle. The method further includes actuating a parking brake lever of the parking brake sub-assembly. An operating arm of the parking brake lever rotates in a direction towards the handlebar, and a locking arm of the parking brake lever engages with a locking groove of the lever holder by rotating in a direction away from the handlebar causing the parking brake sub-assembly to lock the rear wheel brake lever or the synchronous brake lever under actuated condition, which further locks a rear wheel or both the rear wheel and a front wheel of the two-wheeled vehicle. The method also includes actuating a rear wheel brake lever. The rear wheel brake lever or the synchronous brake lever further rotates in a direction towards the handlebar causing the locking arm of the parking brake lever to disengage from the locking groove and rotating in a direction towards the handlebar. This causes the parking brake sub-assembly to unlock the rear wheel of the two-wheeled vehicle. [00032] In an embodiment, a torsional spring and a circlip is assembled at the bottom side of the parking brake lever. The torsional spring enables automatic return of the parking brake lever after actuation or deactivation, while the circlip enables arresting the axial movement of the parking brake lever. In another embodiment, any other suitable means can be used that performs the desired functionality of the. torsional spring and the circlip. In one embodiment, the locking profile is convex shaped in the tip portion of the locking arm of the parking brake lever, while it is concave shaped in the locking groove of the lever holder. Such a profile enables minimization of wear and tear of the parking brake sub-assembly and to improve locking of the parking brake lever.

[00033] These and other advantages of the present subject matter would be described in greater detail in conjunction with the figures in the following description.

[00034] Figure 1 illustrates a two-wheeled vehicle, more particularly, a scooter type two-wheeled vehicle, in accordance with an embodiment of the present subject matter. In an embodiment, the scooter-type two-wheeled vehicle 100 includes a body frame assembly (not shown), for example an underbone body frame assembly, made of steel or aluminium alloy and covered by various covers. Further, in one embodiment, the body frame assembly supports a steering assembly including a steering shaft (not shown), and a handlebar 102 in a front portion thereof. A front fork 112 is.rotatably supported on the.steering shaft.. In an embodiment, the handlebar 102 provided above the front fork 112 allows steering of a front wheel 110. A headlamp assembly 104 is supported on the handlebar 102. Further, in an embodiment, a front cover 106 is provided to cover a forward facing side of the body frame assembly, and a front fender 108 is provided to cover an upper portion of the front wheel 110.

[00035] In a similar manner, left and right side covers 122 are disposed to cover left and right side surfaces of a rear portion of the body frame assembly. A seat 118 is disposed above the left and right side covers 122. In an embodiment, afuel tank (not shown in Fig. 1) is arranged under the seat 118. An engine (riot shown) is arranged downwardly and in front of the fuel tank. An air fuel mixture sent in by a throttle body or carburetor (not shown in Fig. 1) to a combustion chamber of the engine powers the engine. Furthermore, combustion gases generated by the engine is let out as exhaust from a muffler assembly 116 extending along a right hand side of the scooter type two-wheeled vehicle 100. In an embodiment, the two-wheeled vehicle 100 of the present subject matter includes a toggle link (not shown) that is supported swingably on a lower side of the left and right side covers 122. A suspension (not shown) is mounted between the body frame assembly and the engine. A rear wheel 114 is supported on a rear portion of the engine.

[00036] Figure 2 (a) illustrates a handlebar assembly 200 of the two-wheeled vehicle 100, in accordance with an embodiment of the present subject matter. In an embodiment, a parking brake sub-assembly 208 is mounted on the handlebar 102 of the two-wheeled vehicle 100. The parking brake sub-assembly 208, in an embodiment, is mounted in such a manner that both the rear wheel brake lever and the parking brake lever of the parking brake sub-assembly 208 are easily accessible to the rider. In an embodiment, the handlebar assembly 200 is rotatably mounted about a head tube 206 of the two-wheeled vehicle 100. The headlamp assembly 104 houses a headlamp (hot shown) and other components, for example, speedometer console, by means of one or more housing covers, for instance, a headlamp housing front cover 202 houses the front portion of the headlamp, while a headlamp housing rear cover 204 houses the rear portion. In an embodiment, the parking brake sub¬assembly 208 is accommodated within the headlamp housing front cover 202 and the headlamp housing rear cover 204 of the headlamp assembly 104. [00037] Figure 2 (b) illustrates the handlebar "assembly 200 of the two-wheeled vehicle 100, in accordance with another embodiment of the present subject matter. In an embodiment, the headlamp housing front cover is mounted to the handlebar assembly 200 by means of at least one headlamp housing mounting bracket 216. In an embodiment, a clearance 214 is formed between the parking brake sub-assembly 208 and a top end 210 of the headlamp housing front cover 202 such that the operation of the parking brake sub-assembly 208 does not interefere with an inner surface of the top end 210 of the headlamp housing front cover 202. Similarly, in another embodiment, the clearance 214 also extends between the parking brake sub¬assembly 208 and a bottom end 212 of the headlamp housing front cover 202. [00038] Figure 2 (c) illustrates a top sectional view of the handlebar assembly 200 of the two-wheeled vehicle 100, in accordance with an embodiment of the present subject matter. In an embodiment, the parking brake sub-assembly 208 includes a rear wheel brake lever 220, for example, the rear wheel brake lever 220 is a hand operated lever mounted on a LH side of the handlebar assembly 200. In one embodiment, the parking brake sub-assembly 208 includes a parking brake lever 222 pivotally mounted on the rear wheel brake lever 220. For instance, the parking brake lever 222 is mounted at a location substantially closer to the mounting location of the rear wheel brake lever 220 on the lever holder 218 of the handlebar assembly 200. In an embodiment, the clearance 214 between the parking brake sub¬assembly 208 and the headlamp housing front cover 202 ensures that the clockwise and anti-clockwise rotation of the parking brake lever 222 does not cause an interference with headlamp housing front cover 202. This ensures that the headlamp assembly 104 is not altered at any circumstances due to the mounting of the parking brake lever 222 on the rear wheel brake lever 220.

[00039] Figure 3 (a) illustrates a perspective top view of braking system 300 having a parking brake sub-assembly 208 mounted on the handlebar assembly 200 of the two-wheeled vehicle 100, in accordance with an embodiment of the present subject matter. In ah embodiment, the parking brake lever 222 is mounted on the rear wheel brake lever 220 in such a manner that during a non-operating condition of the parking brake lever 222, the parking brake lever 222 is disposed substantially perpendicular to a central longitudinal axis 302 of the handlebar 102 of the handlebar assembly 200. In an embodiment, the rear wheel brake lever 220 is mounted on the lever holder 218 by means of at least one mounting hinge joint 304, such that the rear wheel brake lever 220 is hingedly rotated about the hinge joint 304 during actuation and deactivation of the rear wheel brake lever 220 and the parking brake lever 222.

[00040] In another embodiment, the braking system 300 is a synchronized braking system 300 having a rear wheel brake lever 220 capable of simultaneously actuating both the rear wheel 114 and the front wheel 110 of the two-wheeled vehicle 100. In this embodiment, the lever holder 218 accommodates a synchronized brake unit 306 adjoining the parking brake lever 222.

[00041] Figure 3 (b) illustrates the braking system 300 and the parking brake sub¬assembly 208 of the two-wheeled vehicle 100, in accordance with an embodiment of the present subject matter. In an embodiment, the parking brake lever 222 includes an operating arm 308 and a locking arm 310 disposed about an intermediate pivot point 316 (shown in Figure 3 (d)). The parking brake lever 222 is pivoted to the rear wheel brake lever 220 in such a manner that whenever the rear

wheel brake lever 220 is actuated or released, the parking brake lever 222 follows the rotational movement of the rear wheel brake lever 220 during a non-operational condition of the parking brake sub-assembly 208.
One or more projections 314, for example, rotational stoppers 314 are provided on the rear wheel brake lever 220 on either side of the intermediate pivot point 316 of the parking brake lever 222. The one or more projections 314 limit the rotational movement of the parking brake lever 222 on both directions. In an embodiment, the lever holder 218 has a profile to accommodate the locking arm 310 of the parking brake lever 222 during the non-operating condition of the parking brake lever 222. In one embodiment, the lever holder 218 includes a locking groove 312 having a concave profile capable of receiving the tip portion of the locking arm 310 when the parking brake lever 222 is actuated to move to a locked condition.

[00042] Figure 3 (c) and 3 (d) illustrates an unlocked condition 300-1 and a locked condition 300-2 of the parking brake sub-assembly 208, in accordance with an embodiment of the present subject matter. In an embodiment, the locking arm 310 of the parking brake lever 222 remains substantially parallel to the lever holder 218 when the parking brake sub-assembly 208 remains in the unlocked condition 300-1. In an embodiment, the mounting and the orientation of the parking brake lever 222 will not interfere with the normal functioning of the rear wheel brake lever 220 when the. vehicle is in running condition.In an embodiment, the projections 314-1 and 314-2 provided on the rear wheel brake lever 220 are disposed in such a manner that the rotation of the parking brake lever 222 is limited in both clockwise and anti¬clockwise directions. For example, in an embodiment, the projections 314-1 and 314-2 limit the angle of rotation of the parking brake lever 222 to approximately in a range of 45° to 70°. In an embodiment, the operating arm 308 of the parking brake lever 222 is disposed substantially farther from the hinge point 304 of the rear wheel brake lever 220.

[00043] In an embodiment, when the vehicle 100 is stopped and attains a stationary condition, the rear wheel brake lever 220 is depressed to move to a brake actuation position 318. The operating anri 308 of the parking brake lever 222 is actuated to move to a parking brake actuation position 320. In an embodiment, the operating arm 308 of the parking brake lever 222 is substantially parallel to the rear wheel brake lever 220 during the parking brake actuation position 320. In an embodiment, during the parking brake actuation position 320, the parking brake lever 222 is at a locked condition 300-2. The tip portion of the locking arm 310 engages with the locking groove 312 of the lever holder 218, thereby enabling locking of the rear wheel brake lever 220 of the two-wheeled vehicle 100. Further, in one embodiment, the locking of the rear wheel brake lever 220 causes locking of the rear wheel 114 of the two-wheeled vehicle 100. In one embodiment, the lever holder 218 includes an extended arm 322 whose one side that faces the rear wheel brake lever 220 includes the locking groove 310, while other side includes a failsafe stopper for limiting the movement of the synchronized brake unit 306. In an embodiment, the locking of the synchronous brake lever 218 causes locking of the rear wheel 114 and the front wheel 110.

[00044] Figure 4 (a) and 4 (b) illustrates a front and top view of a parking brake lever 222, in accordance with an embodiment of the present subject matter. In an embodiment, the parking brake lever 222 includes a pivot pin 402 that is disposed centrally extending downwards from the intermediate pivot point 316 to be pivptally mounted on the rear wheel brake lever 220. In an embodiment, the bottom end of the pivot pin 402 is capable of being mounted with a spring means, for example, a torsion spring (not shown) held tightly by means of a circlip. In an embodiment, the operating arm 308 and the locking arm 310 extends perpendicularly to the pivot pin 402. Further, in an embodiment, a stepped portion 404, for example, a rotational stopper element is provided underneath the locking arm 310, which is capable of engaging with the one or more projections 314-1, 314-2 in order to limit the rotational movement of the parking brake lever 222 in both directions.

[00045] Although the subject matter has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. It is to be understood that the description of the subject matter described herein are not necessarily limited to the features described herein. Rather, the features are disclosed as embodiments of the braking system 300 and the method of operating the braking system.

We claim:

1. A braking system (300) for a two-wheeled vehicle (100), the braking system (300) comprising:
a front wheel brake;
a. rear wheel brake actuated by a rear wheel brake lever (220) through a rear brake cable; and
a lever holder (218) mounted on a handlebar (102) of said two-wheeled vehicle (100), said rear wheel brake lever (220) having a first end hingedly coupled to said lever holder (218); characterized in that,
a parking brake sub-assembly (208) is mounted on said rear wheel brake lever (220) substantially farther from said first end, said parking brake sub-assembly (208) comprises a parking brake lever (222) having a locking arm (310) and an operating arm (308) rotatably disposed about an intermediate pivot point (316), wherein said locking arm (310) is disposed substantially parallel to said lever holder (218) in an unlocked condition of said parking brake lever (222), and said lever holder (218) includes a locking groove (312) disposed substantially ahead of a tip portion of said locking arm (310) during said unlocked condition of said parking brake lever (222), and wherein
said locking arm (310) is disposed substantially perpendicular to said lever holder (218) in a locked condition of said parking brake lever (222), and said tip portion of said locking arm (310) engages with said locking groove (312) during said locked condition of said parking brake lever (222).

2. The braking system (300) for a two-wheeled vehicle (100) as claimed in claim 1, wherein said rear wheel brake lever (220) comprises at least two projections (314-1,314-2) disposed along a sweeping surface of said parking brake lever (222).

3. The braking system (300) for a two-wheeled vehicle (100) as claimed in claim 1 or 2, wherein said parking brake lever (222) includes a stepped portion (404) disposed substantially below said locking arm (310) juxtaposing said intermediate pivot point (316), said stepped portion (404) is capable of interfering with said at least two projections (314-1, 314-2) when said parking brake lever (222) is rotated from either locked (300-2) or unlocked condition (300-1).

4. The braking system (300) for a two-wheeled vehicle (100) as claimed in claim 1, wherein said operating arm (308) of said parking brake lever (222) is actuated along a direction of actuation of said rear wheel brake lever (220) to attain said locked condition (300-2). '

5. The braking system (300) for a two-wheeled vehicle (100) as claimed in claim 1, wherein said locking arm. (310) disengages from said locking groove (312) of said lever holder (218) when said rear wheel brake lever (220) is further depressed to attain said unlocked condition (300-1).

6. A synchronized braking system (300) for a two-wheeled vehicle (100), the
. synchronized braking system (300) comprising:
a front wheel brake;
a rear wheel brake;
a synchronized brake lever connected to said front wheel brake and to said rear wheel brake through a synchronized brake cable and a rear brake cable, respectively; and a lever holder (218) mounted on a handlebar (102) of said two-wheeled vehicle (100), said rear wheel brake lever (220) having a first end hingedly coupled to said lever holder (218); characterized in that, a parking brake sub-assembly (208) is mounted on said rear wheel brake lever (220) substantially farther from said first end, said parking brake sub-assembly (208) comprises a parking brake lever (222) having a locking arm (310) and an operating arm (308) rotatably disposed about an intermediate pivot point (316), wherein
said locking arm (310) is disposed substantially parallel to said lever holder (218) in an unlocked condition of said parking brake lever (222), and said lever holder (218) includes a locking groove (312) disposed substantially ahead of a tip portion of said locking arm (310) during said unlocked condition of said parking brake lever (222), and wherein said locking arm (310) is disposed substantially perpendicular to said lever holder (218) in a locked condition of said parking brake lever (222), and said tip portion of said locking arm (310) engages with said locking groove (312) during said locked condition of said parking brake lever (222).

7. The synchronized braking system (300) for a two-wheeled vehicle (100) as claimed in claim 6, wherein said locking groove (312) is disposed on one side of an extending arm of said lever holder (218), and wherein said extending arm includes a reaction lever stopper on other side.

8. A two-wheeled vehicle (100) comprising:
a handlebar (102);
a headlamp housing having a front cover (202) and a rear cover (204);
a front wheel brake;
a rear wheel brake actuated by a rear wheel brake lever (220) through a rear brake cable; and a lever holder (218) mounted on a handlebar (102) of said two-wheeled vehicle (100), said rear wheel brake lever (220) having a first end hingedly coupled to said lever holder (218); characterized in that, a parking brake sub-assembly (208) is mounted on said rear wheel brake lever (220) substantially farther from said first end, said parking brake sub-assembly (208) comprises a parking brake lever (222) having a locking arm.(310) and an operating arm (308) rotatably disposed about an intermediate pivot point (316), wherein said locking arm (310) is disposed substantially parallel to said lever holder (218) in an unlocked condition of said parking brake lever (222), and said lever holder (218) includes a locking groove (312) disposed substantially ahead of a tip portion of said locking arm (310) during said unlocked condition of said parking brake lever (222), and wherein said locking arm (310) is disposed substantially perpendicular to said lever holder (218) in a locked condition of said parking brake lever (222), and said tip portion of said locking arm (310) engages with said locking groove (312) during said locked condition of said parking brake lever (222).

9. The two-wheeled vehicle (100) as claimed in claim 8, wherein said operating arm (308) of said parking brake lever (222) is disposed outside said front cover (202), and said tip portion of said locking arm (310) is disposed substantially farther from an inner surface of said front cover (202) during said unlocked condition (300-1) of said parking brake lever (222).
10. A method for operating parking brake sub-assembly (208) in a two-wheeled vehicle (100) comprising:
actuating a rear wheel brake lever (220), said rear wheel brake lever (220) rotating in a direction towards a handlebar (102) of said two-wheeled vehicle (100);
actuating a parking brake lever (222) of said parking brake sub-assembly (208), an operating arm (308) of said parking brake lever (222) rotating in a direction towards said handlebar (102), and a locking arm (310) of said parking brake lever (222) engaging to a locking groove (312) of lever holder (218) by rotating in a direction away from said handlebar (102) causing said parking brake sub-assembly (208) to lock a rear wheel of said two-wheeled vehicle (100); and actuating a rear wheel brake lever (220), said rear wheel brake lever (220) further rotating in a direction towards said handlebar (102) causing said locking arm (310) of said parking brake lever (222) to disengage from said locking groove (312). and rotating in a direction towards said handlebar (102), said parking brake sub-assembly (208) unlocking said rear wheel of said two-wheeled vehicle (100).