FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10; rule 13]
TITLE: “AN EMERGENCY BRAKE UNIT OF A BRAKE ASSEMBLY FOR A VEHICLE AND A BRAKE ASSEMBLY THEREOF”
Name and Address of the Applicant:
TATA MOTORS LIMITED; an Indian company having a registered address at Bombay
House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India.
Nationality: Indian
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD
The present disclosure, in general, relates to the field of automobile engineering. Particularly, but not exclusively, the present disclosure relates to a brake assembly of a vehicle. Further, embodiments of the present disclosure relate to the brake assembly including a primary brake unit and an emergency brake unit being operable when change in speed of the vehicle is less than a predefined threshold value on engagement of the primary brake unit.
BACKGROUND OF THE DISCLOSURE
Brake assemblies, in general, are provisioned in a vehicle for regulating speed at which the vehicle travels and also in order to bring the vehicle to a halt when desired. The brake assemblies of the vehicle are generally operable based on engagement of a disc or a drum, which may be connected to a portion of the wheel of the vehicle for regulating the speed. Such brake assemblies are hydraulically operated, where actuation of a pedal in a cabin of the vehicle allows operation of the brake assemblies.
In some scenarios, such brake assemblies may fail due to a number of parameters, due to which regulating (i.e., retardation) speed of the vehicle may not be performed. Some of the parameters that may cause failure of the break assembly may be pressure loss in the hydraulic system associated with the break assemblies, wear off of break pads in the break assembly, and amongst others. Due to such scenarios, retardation of the vehicle may not be timely performed whereby resulting in collision or accidents of the vehicle.
To cater such requirements, conventionally emergency break assemblies have also been employed in the vehicles. With the advent of technology, some of the emergency brake assemblies employed in the vehicle maybe a secondary break unit that may be operable upon failure or in-effective operation of the primary break unit. Such secondary break unit may be operable by electric motors and/or pneumatic cylinders, in response to failure or in-effective operation of the primary break unit. However, such configurations of the secondary break unit may be bulky in nature and may not be responsive enough in case of emergency situations. Moreover, accommodating components such as the electric motors or the pneumatic cylinders may be tedious and cumbersome provided limited space being available between the break assembly and corresponding wheel of the vehicle.

The present disclosure is directed at overcoming one or more limitations stated above.
SUMMARY OF THE DISCLOSURE
One or more shortcomings of the prior art are overcome by a system and assembly as claimed and additional advantages are provided through the system and the assembly as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.
In one non-limiting embodiment of the present disclosure an emergency brake unit of a brake assembly for a vehicle is disclosed. The emergency brake unit is engageable with a disc of a primary brake unit associated with the vehicle. Further, the emergency brake unit comprising a second caliper connectable about at least a portion of a wheel of the vehicle and one or more second set of brake pads connectable at ends of the second caliper. The one or more second set of brake pads being operatively displaceable relative to the second caliper. The emergency brake unit further includes an igniter unit operatively connectable to the second caliper. The igniter unit being configured to flash, causing displacement of the one or more second set of brake pads to engage the disc of the primary brake unit.
In an embodiment, the igniter unit comprises a housing connectable between an end of the second caliper and the one or more second set of brake pads. The housing being configured to contain a combustible medium. The igniter unit further includes an igniter element which is accommodated in the housing and in presence of the combustible medium. The igniter element is configured to ignite the combustible medium for flashing, causing displacement of the one or more second set of brake pads to engage the disc.
In an embodiment, the combustible medium is Sodium Azide. The combustible medium is contained in the housing in at least one of solid state and a gaseous state.
In an other non-limiting embodiment of the present disclosure, a brake assembly of a vehicle is disclosed. The brake assembly comprising a primary brake unit including a first caliper

connectable about at least a portion of a wheel of the vehicle and one or more first set of brake pads connectable at ends of the first caliper. The one or more first set of brake pads being operatively displaceable by the first caliper. The primary brake unit also includes a disc located between the one or more first set of brake pads and connectable to at least a portion of the wheel. The disc being engageable by the one or more first set of brake pads to retard motion of the wheel. The primary brake unit further includes an actuating mechanism operatively connectable to the first caliper. The actuating mechanism configured to displace the one or more first set of brake pads for engaging with the disc. The brake assembly further includes an emergency brake unit engageable with the disc of the primary brake unit. The emergency brake unit comprising a second caliper connectable about at least a portion of a wheel of the vehicle and one or more second set of brake pads connectable at ends of the second caliper. The one or more second set of brake pads being operatively displaceable relative to the second caliper. The emergency brake unit further includes an igniter unit operatively connectable to the second caliper. The igniter unit being configured to flash, causing displacement of the one or more second set of brake pads to engage the disc of the primary brake unit. The brake assembly also includes one or more sensors communicatively coupled to the primary brake unit. The one or more sensors configured to sense operating condition of the primary brake unit. Furthermore, the brake assembly includes a control unit communicatively coupled to the one or more sensors, the actuating mechanism and the igniter unit. The control unit is configured to determine change in speed of the vehicle relative to operating condition of the primary brake unit, based on a signal received from the one or more sensors. The control unit is further configured to actuate the igniter unit on determining change in speed of the vehicle being higher than a predefined threshold value, when the operating state of the primary brake unit remains unchanged.
In an embodiment, the brake unit further comprises a switching element operatively connectable between the control unit and of the emergency brake unit. The switching element is configured to actuate the igniter unit, on receiving an operational signal from the control unit. The switching element is at least one of a toggle switch and a normally open relay.
In an embodiment, the operating condition of the primary braking unit sensed by the one or more sensors corresponds to an actuated condition of the primary braking unit.

In an embodiment, the predefined threshold value corresponds to gradient values ranging from 1km/pr to 15km/hr, based on speed of the vehicle on operating the primary brake unit.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:
Figure 1 illustrates a schematic layout of a brake assembly including a primary break unit and an emergency break unit, in accordance with an embodiment of the present disclosure.
The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the system and method illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the figures and will be described below. It should be understood, however that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.

The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, assembly, mechanism, system, method that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or mechanism.
The disclosure is described in the following paragraphs with reference to Figure 1. In the figure, the same element or elements which have same functions are indicated by the same reference signs. It is to be noted that, the vehicle or wheel of the vehicle is not illustrated in the figure for the purpose of simplicity. One skilled in the art would appreciate that the emergency break unit and the break assembly as disclosed in the present disclosure can be used in any vehicle including but not liming to passenger car, heavy vehicles, light duty vehicles or any other vehicle.
Figure 1 is an exemplary embodiment of the present disclosure which illustrates a brake assembly (100) of a vehicle. The break assembly may be provided to each wheel of the vehicle, in order to selectively engage and regulate speed of the corresponding wheel and in turn speed of the vehicle. The break assembly a primary brake unit (1), which may be operable by a user or a driver from a cabin of the vehicle. The primary break unit may be operable by at least one of a lever and a pedal, provision in the cabin for selective operation and regulate (i.e., to reduce) speed of the vehicle. The primary break unit maybe at least one of a disc (4) brake assembly (100) and a drum break assembly which may be selectively employable among wheels of the vehicle. For instance, some of the wheels of the vehicle may be equipped with the disc (4) break assembly, while remaining wheels of the vehicle may be equipped with drum break assembly. In an embodiment, each wheel of the vehicle may be equipped with either the disc (4) brake assembly (100) or the drum break assembly.
In the illustrative embodiment, the primary break (1) unit is depicted to be the disk break assembly configuration, where the primary brake unit (1) includes a first caliper (2) connectable about at least a portion of the wheel of the vehicle. The first caliper (2) may be removably connected a bracket (not seen in figures) associated with an axle of the wheel. The first caliper (2) may be

hydraulically or pneumatically operated. In the illustrative embodiment, the first caliper (2) is hydraulically operable by an actuating mechanism (5). For such an operation, the actuation mechanism of the first caliper (2) includes a piston-cylinder arrangement, where the cylinder associated with the first caliper (2) is configured to receive a hydraulic fluid which in-turn displaces the piston (9)within the cylinder. Additionally, the primary brake unit (1) includes one or more first set of brake pads (3) which are connectable at ends of the first caliper (2), where displacement of the piston (9)within the cylinder of the actuation mechanism is configured to operatively displace the one or more first set of brake pads (3) relative to the first caliper (2). Further, for operatively engaging with the corresponding wheel of the vehicle, the primary brake unit (1) includes a disc (4) which is located between the one or more first set of brake pads (3) and connectable to at least a portion of the wheel. The disc (4) being engageable by the one or more first set of brake pads (3) to retard motion of the wheel, upon operation of the actuating mechanism
(5) which displaces the one or more first set of brake pads (3) for engaging with the disc (4).
In an embodiment, the disc (4) may be connectable to a wheel hub of the wheel by way of fastening, clamping and/or riveting. Such connection between the disc (4) and the wheel hub may ensure that the disc (4) is adapted to rotate at same speed as that of the wheel of the vehicle. Further, the one or more first set of brake pads (3) may be configured to engage about two opposing major surfaces of the disc (4). Due to such engagement of the one or more first set of brake pads (3), rotation of the disc (4) and in-turn that of the wheel may be regulated (i.e., reduced).
The brake assembly (100) also includes one or more sensors (6) which may be communicatively coupled to the primary brake unit (1). The one or more sensors (6) is configured to sense operating condition of the primary brake unit (1), where such operating condition of the primary brake unit (1) may be either of an engaged condition and a disengaged condition. The one or more sensors
(6) may be adapted to sense operating condition of the primary bake unit (1) based on parameters
including at least one of displacement of the one or more first set of brake pads (3) relative to the
caliper, quantity of hydraulic fluid being supplied by the actuation unit, condition of the pedal in
the cabin which is associated with the brake assembly (100), and among others. Based on such
parameters, the one or more sensors (6) are adapted to sense the operating condition of the primary
brake unit (1). Meanwhile, the one or more sensors (6) is also configured to sense variation in such
parameters which indicates deviation in the operating condition of the primary brake unit (1). For

instance, such deviation in the operating conditions may result in failure to regulate speed of the vehicle by the primary brake unit (1), which in-turn is sensed by the one or more sensors (6). In an embodiment, the one or more sensors (6) may be including a pressure sensor configured to sense pressure of hydraulic fluid supplied from the actuation unit, a proximity or Hall effect sensor configured to sense displacement of the one or more first set of brake pads (3), an accelerometer configured to sense movement of the pedal, and among others.
In the illustrative embodiment, the brake assembly (100) further includes an emergency brake unit (10). The emergency brake unit (10) may be different from that of a parking brake assembly associated with the vehicle, where the emergency brake unit (10) may be adapted to be operable based on the operating condition of the primary brake unit (1). As can be seen in Figure 1, the emergency brake unit (10) is engageable with the disc (4) of the primary brake unit (1). In an embodiment, the emergency brake unit (10) may be associated with the brake assembly (100) of each wheel of the vehicle. i.e., the emergency brake unit (10) may be employed with the primary brake unit (1) in each wheel of the vehicle. Also, as an alternative, the emergency brake unit (10) may be associated with the primary brake unit (1) of the brake assembly (100) in some of the wheels of the vehicle. Such configuration of the emergency brake unit (10) and the brake assembly (100) may be based on the requirement and/or nature of the vehicle.
The emergency brake unit (10) includes a second caliper (11) connectable about at least a portion of a wheel of the vehicle. Further, the second caliper (11) may be connectable to the wheel in similar sense to the first caliper (2). The second caliper (11) may be distantly located from the first caliper (2). In an embodiment, the second caliper (11) may be positioned relative to the first caliper (2) such that, operation of the first caliper (2) has minimal to no effect on operation of the second caliper (11). As an example, the second caliper (11) is positioned at an opposing location to the first caliper (2), while the second caliper (11) may also be positioned adjacent to or at an angular distance from the first caliper (2). The second caliper (11) includes a piston-cylinder arrangement, where the piston (9) of the second caliper (11) is displaceable towards the disc (4) upon operation. Further, for engaging with the disc (4), the emergency brake unit (10) includes one or more second set of brake pads (12) which are connectable at ends of the second caliper (11). The one or more second set of brake pads (12) are operatively displaceable relative to the second caliper (11) based on an igniter unit (13) of the emergency brake unit (10). The igniter unit (13) is operatively

connectable to an end of the second caliper (11). In an embodiment, the igniter unit (13) may be defined about the cylinder of the second caliper (11), in order to selectively displace corresponding brake pad of the one or more brake pads (12) being connected to the second caliper (11). In the illustrative embodiment, the igniter unit (13) configured to flash, causing displacement of the one or more second set of brake pads (12) to engage the disc (4). Here, the term “flash” refers to combustion resulting in mechanical movement at a small defined time. Such flashing by the igniter unit (13) may cause at least one of the one or more brake pads (12) to be spontaneously displaced relative to the second caliper (11). In an embodiment, time frame referred for spontaneous displacement of the one or more second set of brake pads (12) may be in a range of 0.1 to 2 sec.
The igniter unit (13) includes a housing (14) which may be connectable between an end of the second caliper (11) and the one or more second set of brake pads (12). In an embodiment, the housing (14) of the igniter unit (13) may be integrally formed with the second caliper (11). Further, the housing (14) is configured to contain a combustible medium (16), which may be capable of producing the flash upon operation of the igniter unit (13). The igniter unit (13) further includes an igniter element (15) that may be accommodated in the housing (14). The igniter element (15) is so placed in the housing (14) that the igniter element (15) is exposed to presence of the combustible medium (16). In an embodiment, the combustible medium (16) being contained in the housing (14) in at least one of solid state and a gaseous state. Further, the combustible medium (16) is including Sodium Azide, which may be combustible upon supplying an electric charge through the igniter unit (13). Due to such configuration, the igniter element (15) is adapted to ignite the combustible medium (16) for flashing, causing displacement of the one or more second set of brake pads (12) to engage the disc (4). With that, the one or more second set of brake pads (12) may spontaneously engage the disc (4) for regulating speed of the vehicle.
In an embodiment, the igniter element (15) may be an electric wire and/or coil and/or strip being made of metallic material and capable of reaching high temperature at a short time period. Alternatively, the igniter element (15) may be an electric arcing device, capable of producing electric arcs that may cause combustion of the combustible medium (16). Further, the igniter unit (13) may be sealed about the second caliper (11) such that the combustible medium (16) may not

be exposed to atmosphere, while it may also be ensured that adequate atmospheric air is maintained in the housing (14) of the igniter unit (13) for combustion.
The brake assembly (100) further includes a control unit (7) which is communicatively coupled to the one or more sensors (6), the actuating mechanism (5) and the igniter unit (13). The control unit (7) may be a dedicated control unit (7) associated with the brake assembly (100), or the control unit (7) may be a centralized electronic unit or the control unit (7) may be an electronic unit associated with an anti-lock braking unit of the vehicle. The control unit (7) is configured to receive a signal from the one or more sensors (6) in order to determine change in speed of the vehicle relative to operating condition of the primary brake unit (1). Such determination by the control unit (7) may assist in predicting and/or evaluating possible failure in operation of the primary brake unit (1) to regulate speed of the vehicle. In case the control unit (7) may predict that the primary brake unit (1) is capable of regulating speed of the vehicle, the control unit (7) refrains from actuating the emergency brake unit (10). Moreso, in case the control unit (7) may determine that the primary brake unit (1) may fail to regulate speed of the vehic l e, t he contr ol unit (7) is configured to actuate the igniter unit (13) based on change in speed of the vehicle being higher than a predefined threshold value, when the operating state of the primary brake unit (1) remains unchanged. i.e., the control unit (7) may be configured to actuate the emergency brake unit (10) when the primary brake unit (1) may be still operational and being engaged with the disc (4) of the wheel.
In an embodiment, the control unit (7) upon receiving the signal from the one or more sensors (6) indicating the operating condition of the primary brake unit (1) to corresponds to an actuated condition of the primary brake unit (1), while change in speed of the wheel associated with the primary brake unit (1) and in-turn the vehicle does not experience relative regulating, the control unit (7) is configured to actuate the emergency brake unit (10). For such operation, the control unit (7) is configured to compare instantaneous change in speed of the vehicle with the predefined threshold value. In an embodiment, the predefined threshold value may correspond to gradient values (i.e., difference in values) ranging from 1km/hr to 15km/hr, based on speed of the vehicle on operating the primary brake unit (1). For example, when the speed of the vehicle may be considered to be about 30km/hr and that the primary brake unit (1) is actuated by operating the pedal, then the control unit (7) may determine change in speed of the vehicle (i.e., say decelerate

to less than 20km/hr) for a pre-set time (for instance say 1 to 5 sec time period). In case such change in pre-set time may not be within the predefined threshold values, then the control unit (7) may be configured to actuate the emergency brake unit (10). Here, it should be noted that the predefined threshold value may proportionally vary with speed of the vehicle at which the primary brake unit (1) is operated. Due to such condition, the predefined threshold value may not be considered as a limitation, rather as an exemplary parameter which may be varied based on operating conditions of the vehicle.
In the illustrative embodiment, the brake assembly (100) further includes a switching element (8) which is operatively connectable between the control unit (7) and of the emergency brake unit (10). The switching element (8) is configured to actuate the igniter unit (13), on receiving an operational signal from the control unit (7). For such operation, the switching element (8) is at least one of a toggle switch and a normally open relay. With such configuration of the switching element (8), the control unit (7) may ensure that actuation of the emergency brake unit (10) may be based on failure of the primary brake unit (1) and that unintentional and unnecessary actuation of such emergency brake unit (10) may be averted.
EQUIVALENTS
With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory

phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
In addition, where features or aspects of the disclosure are described in terms of Markush groups, those skilled in the art will recognize that the disclosure is also thereby described in terms of any individual member or subgroup of members of the Markush group.
While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments

disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

We claim:
1. An emergency brake unit (10) of a brake assembly (100) for a vehicle, wherein the
emergency brake unit (10) being engageable with a disc (4) of a primary brake unit (1)
associated with the vehicle, the emergency brake unit (10) comprising:
a second caliper (11) connectable about at least a portion of a wheel of the vehicle;
one or more second set of brake pads (12) connectable at ends of the second caliper (11), the one or more second set of brake pads (12) being operatively displaceable relative to the second caliper (11); and
an igniter unit (13) operatively connectable to the second caliper (11), wherein the igniter unit (13) being configured to flash, causing displacement of the one or more second set of brake pads (12) to engage the disc (4) of the primary brake unit (1).
2. The emergency brake unit (10) as claimed in claim 1, wherein the igniter unit (13)
comprises:
a housing (14) connectable between an end of the second caliper (11) and the one or more second set of brake pads (12), the housing (14) being configured to contain a combustible medium (16); and
an igniter element (15) accommodated in the housing (14) and in presence of the combustible medium (16), wherein the igniter element (15) is configured to ignite the combustible medium (16) for flashing, causing displacement of the one or more second set of brake pads (12) to engage the disc (4).
3. The emergency brake unit (10) as claimed in claim 2, wherein the combustible medium (16) is Sodium Azide.
4. The emergency brake unit (10) as claimed in claim 2, wherein the combustible medium (16) is contained in the housing (14) in at least one of solid state and a gaseous state.
5. A brake assembly (100) of a vehicle, comprising:
a primary brake unit (1) comprising:
a first caliper (2) connectable about at least a portion of a wheel of the vehicle;

one or more first set of brake pads (3) connectable at ends of the first caliper (2), the one or more first set of brake pads (3) being operatively displaceable by the first caliper (2);
a disc (4) located between the one or more first set of brake pads (3) and connectable to at least a portion of the wheel, the disc (4) being engageable by the one or more first set of brake pads (3) to retard motion of the wheel; and
an actuating mechanism (5) operatively connectable to the first caliper (2), the actuating mechanism (5) configured to displace the one or more first set of brake pads (3) for engaging with the disc (4);
an emergency brake unit (10) engageable with the disc (4) of the primary brake unit (1), the emergency brake unit (10) comprising:
a second caliper (11) connectable about at least a portion of a wheel of the vehicle and distantly located from the first caliper (2);
one or more second set of brake pads (12) connectable at ends of the second caliper (11), the one or more second set of brake pads (12) being operatively displaceable relative to the second caliper (11); and
an igniter unit (13) operatively connectable to the second caliper (11), the
igniter unit (13) configured to flash, causing displacement of the one or more
second set of brake pads (12) to engage the disc (4);
one or more sensors (6) communicatively coupled to the primary brake unit (1), the
one or more sensors (6) configured to sense operating condition of the primary brake unit
(1);
a control unit (7) communicatively coupled to the one or more sensors (6), the actuating mechanism (5) and the igniter unit (13), the control unit (7) is configured to:
determine change in speed of the vehicle relative to operating condition of the primary brake unit (1), based on a signal received from the one or more sensors (6); and
actuate the igniter unit (13) on determining change in speed of the vehicle being higher than a predefined threshold value, when the operating state of the primary brake unit (1) remains unchanged.

6. The brake assembly (100) as claimed in claim 5, wherein the igniter unit (13) comprises:
a housing (14) connectable between an end of the second caliper (11) and the one or more second set of brake pads (12), the housing (14) being configured to contain a combustible medium (16); and
an igniter element (15) accommodated in the housing (14) and in presence of the combustible medium (16), wherein the igniter element (15) is configured to ignite the combustible medium (16) for flashing, causing displacement of the one or more second set of brake pads (12) to engage the disc (4).
7. The brake assembly (100) as claimed in claim 5, comprises a switching element (8) operatively connectable between the control unit (7) and of the emergency brake unit (10), wherein the switching element (8) is configured to actuate the igniter unit (13), on receiving an operational signal from the control unit (7).
8. The brake assembly (100) as claimed in claim 7, wherein the switching element (8) is at least one of a toggle switch and a normally open relay.
9. The brake assembly (100) as claimed in claim 5, wherein the operating condition of the primary brake unit (1) sensed by the one or more sensors (6) corresponds to an actuated condition of the primary brake unit (1).
10. The brake assembly (100) as claimed in claim 5, wherein the predefined threshold value corresponds to gradient values ranging from 1km/hr to 15km/hr, based on speed of the vehicle on operating the primary brake unit (1).