FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
[See section 10 and rule 13]
TITLE: “A BOOSTER ASSEMBLY FOR A BRAKING SYSTEM OF A VEHICLE”
NAME AND ADDRESS OF THE APPLICANT:
TATA MOTORS LIMITED, having 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.
1

TECHNICAL FIELD:
Present disclosure generally relates to a field of automobiles. Particularly, but not exclusively, the present disclosure relates to a booster assembly of a braking system for a vehicle to amplify braking and generate higher brake force for stopping the vehicle.
5 BACKGROUND OF DISCLOSURE:
Automobiles such as passenger and commercial vehicles are generally equipped with various braking systems to reduce speed of the vehicle or to stop the vehicle. Based on medium used to transfer brake application force, various types of braking systems are used in the vehicles such as
10 pneumatic braking systems, hydraulic braking systems, and electromagnetic braking system. These braking systems use frictional force generated by frictional contact between brake liners and a moving brake drum or disc of the braking system to stop the vehicle. Commercial vehicles such as heavy duty vehicles employ pneumatic brakes for braking due to its advantages such as faster operation, capability to stop heavy loads, less braking effort, easy supply of working/brake fluid
15 and reliability.
Conventionally, the pneumatic braking system includes a vacuum actuator coupled to a hydraulic mater cylinder. The vacuum actuator comprises a dual chamber having a vacuum in one chamber and atmospheric air in another chamber. The vacuum within the chamber aids in amplification of
20 a force applied on a foot brake pedal due to entry of atmospheric air into the chamber to generate high pressure air in the vacuum actuator. This high-pressure air is transferred to the hydraulic master cylinder to provide driver pedal force amplification to generate high hydraulic pressure. Typically, conventional vacuum boosters reaches a predetermined vacuum level saturation after a predefined actuation of the foot brake pedal. Thus, a greater pedal amplification force cannot be
25 achieved for higher ton/heavy duty vehicle as per the requirement, even after the maximum actuation of the foot brake pedal. Consequently, this increases effort on the foot brake pedal and also reduces the performance of the braking system which may prove hazardous and lead to road accidents.
30 The present disclosure is intended to overcome one or more above stated limitations.
2

SUMMARY OF THE DISCLOSURE:
One or more shortcomings of conventional braking systems are overcome, and additional advantages are provided through a booster assembly for a braking system of the present 5 disclosure. Additional features and advantages are realized through the construction and arrangement of the components of the booster assembly for the braking system to achieve higher braking force for stopping a vehicle. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.
10 In one non-limiting embodiment of the present disclosure, a booster assembly for a braking system for a vehicle is disclosed. The booster assembly comprises a housing and a diaphragm movably disposed within the housing to bifurcate the housing to a first chamber and a second chamber. The first chamber is configured to receive fluid of a first pressure, and the second chamber is configured to receive fluid of a second pressure. A control housing is connected to
15 the housing and is configured to movably accommodate a push rod. The push rod is connected to the diaphragm at one end and to a brake pedal at an other end. A cover member is connected to the control housing and is defined with at least one inlet to receive and dispense pressurized fluid into the second chamber. The pressurized fluid in the second chamber displaces the diaphragm from a first position to a second position to amplify force applied on the brake pedal
20 to generate an increased brake force in the booster assembly.
In an embodiment, the booster assembly comprises of a sealing unit arranged within an opening of the control housing. The sealing unit comprises of an adapter secured to the opening. At least one sealing member is connected to the adapter. The at least one sealing member is disposed 25 between the adapter and the push rod to prevent ingress of fluid from an atmosphere into the control housing.
In an embodiment, the booster assembly comprises of a master cylinder unit with a fluid reservoir and a piston-cylinder unit to store and dispense a brake fluid. The master cylinder unit 30 is fluidly connected to the booster to supply the brake fluid at a predefined pressure to a front brake unit and a rear brake unit of the vehicle.
3

In an embodiment, the booster assembly comprises an output shaft centrally connected to the diaphragm and positioned opposite to the push rod. The output shaft is configured to actuate a piston of the master cylinder unit.
5 In an embodiment, the booster assembly comprises a resilient member mounted on the output shaft to retract the diaphragm from the second position to the first position.
In an embodiment, the first pressure is atmospheric pressure in a range of 1 – 1.5 bar.
10 In an embodiment, the second pressure is greater than the first predetermined pressure and in a range of about 2 to 8 bar.
In an embodiment, the output shaft is disengaged from the master cylinder unit in the first position and engages with the master cylinder unit in the second position to transfer the brake 15 fluid at the predefined pressure.
In one non-limiting embodiment, a braking system is disclosed. The braking system comprises of a compressor configured to generate a pressurized fluid of predetermined pressure. A drying unit is fluidly connected to the compressor. The drying unit is configured to process the
20 pressurized fluid from the compressor to generate the pressurized fluid having a second predetermined pressure. At least one storage tank fluidly connected to the drying unit to receive and store the processed pressurized fluid from the drying unit. A booster assembly is fluidly connected with the at least one storage tank. The booster assembly comprises of a housing and a diaphragm movably disposed within the housing to bifurcate the housing to a first chamber
25 and a second chamber. The first chamber is configured to receive a fluid of a first pressure, and the second chamber is configured to receive pressurized fluid of a second pressure from the at least one storage tank. A control housing is connected to the housing and is configured to movably accommodate a push rod. The push rod is connected to the diaphragm at one end and to a brake pedal at an other end. A cover member is connected to the control housing and is
30 defined with at least one inlet to receive and dispense pressurized fluid into the second chamber. The pressurized fluid in the second chamber displaces the diaphragm from a first position to a second position to amplify force applied on the brake pedal to generate an increased brake force in the booster assembly. A master cylinder unit is fluidly connected to the booster assembly and
4

a rear brake unit of the vehicle and configured to supply a brake fluid at a predefined pressure
to a rear brake unit of the vehicle for braking. An auxiliary booster assembly is fluidly disposed
between the master cylinder unit and a front brake unit. The auxiliary booster assembly is
configured to amplify and supply the brake fluid pressure to the front brake unit for braking.
5
In one non-limiting embodiment, a vehicle is also disclosed. The vehicle comprises a braking
system fluidly connected to a front brake unit and a rear brake unit of the vehicle. The braking
system comprises of a compressor configured to generate a pressurized fluid having a
predetermined pressure. A drying unit is fluidly connected to the compressor and is configured
10 to process the pressurized air from the compressor to generate the pressurized air having a second predetermined pressure. At least one storage tank is fluidly connected to the drying unit to receive and store the processed pressurized fluid from the drying unit. A booster assembly is fluidly connected to the at least one storage tank. The booster assembly comprises of a housing and a diaphragm movably disposed within the housing to bifurcate the housing to a first
15 chamber and a second chamber. The first chamber is configured to receive fluid of a first pressure, and the second chamber is configured to receive pressurized air having a second pressure from the at least one storage tank. A control housing is connected to the housing and is configured to movably accommodate a push rod. The push rod is connected to the diaphragm at one end and to a brake pedal at an other end. A cover member is connected to the control
20 housing, the cover member is defined with at least one inlet to receive and dispense the pressurized fluid into the second chamber. The pressurized in the second chamber displaces the diaphragm from a first position to a second position to amplify force applied on the brake pedal to generate an increased brake force in the booster assembly. Further, a master cylinder unit is fluidly connected to the booster assembly and a rear brake unit. The master cylinder unit is
25 configured to supply the brake fluid at a predefined pressure to the rear brake unit for braking. An auxiliary booster assembly is fluidly disposed between the master cylinder unit and the front brake unit and configured to amplify the pressure of the brake fluid and supply to the front brake unit for braking the vehicle.
30 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,
5

embodiments, and features will become apparent by reference to the drawings and the following description.
BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS:
5
The novel features and characteristics of the disclosure are set forth in the appended description.
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 description of an
illustrative embodiment when read in conjunction with the accompanying drawings. One or
10 more embodiments are now described, by way of example only, with reference to the
accompanying drawings wherein like reference numerals represent like elements and in which:
Fig. 1 illustrates a schematic view of a braking system with a booster assembly, in accordance
with an embodiment of the present disclosure.
15
Fig. 2 illustrates a sectional view of the booster assembly, in accordance with an embodiment
of the present disclosure.
Fig. 3 illustrates a perspective view of a cover member mounted on the booster assembly, in 20 accordance with an embodiment of the present disclosure.
Fig. 4 illustrates a sectional view of a portion of Fig. 2 depicting a sealing unit arranged on a
control housing of the booster assembly, in accordance with an embodiment of the present
disclosure.
25
Fig. 5 illustrates a perspective view of a sealing unit disposed within the booster assembly, in
accordance with an embodiment of the present disclosure.
Fig. 6 is a flow chart depicting a method of operation of the braking system of Fig. 1.
30
Fig. 7 illustrates a perspective view of a vehicle having the braking system of Fig. 1.
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
6

the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION:
5 While the embodiments of the disclosure are subject to various modifications and alternative
forms, specific embodiments thereof have 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 alternatives falling within the scope of the disclosure.
10
It is to be noted that a person skilled in the art would be motivated from the present disclosure
and modify a device and an assembly of any braking system for the purpose of amplifying a
brake force. However, such modification should be construed within the scope of the present
disclosure. Accordingly, the drawings show only those specific details that are pertinent to
15 understand the embodiments of the present disclosure so as not to obscure the disclosure with
details that will be readily apparent to those of ordinary skill in the art having benefit of the
description herein.
The terms “comprises”, “comprising”, or any other variations thereof used in the present 20 disclosure, are intended to cover a non-exclusive inclusion, such that an assembly, a system or a method, which comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such assembly, system and method. In other words, one or more elements in the assembly, system or the method preceded by “comprises… a” does not, without more constraints, preclude the existence of other elements 25 or additional elements in the assembly, system, or the method.
In the following description of the embodiments of the disclosure, reference is made to the accompanying figures that form a part hereof, and in which are shown, by way of illustration, specific embodiments in which the present disclosure may be practiced. These embodiments 30 are described in sufficient detail to enable those skilled in the art to practice the present disclosure, and it is to be understood that other embodiments may be utilized and that, changes
7

may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
Embodiments of the present disclosure discloses a booster assembly for a braking system of a 5 vehicle. Conventionally, the pneumatic braking system includes a vacuum actuator coupled to a hydraulic mater cylinder. The vacuum actuator comprises a dual chamber having a vacuum in one chamber and atmospheric air in another chamber. The vacuum within the chamber aids in amplification of a force applied on a foot brake pedal due to entry of atmospheric air into the chamber to generate high pressure air in the vacuum actuator. This high pressure air is
10 transferred to the hydraulic master cylinder to provide driver pedal force amplification to generate high hydraulic pressure. Typically, conventional vacuum boosters reaches a predetermined vacuum level saturation after a predefined actuation of the foot brake pedal. Thus, a greater pedal amplification force cannot be achieved for higher ton/heavy duty vehicle as per the requirement, even after the maximum actuation of the foot brake pedal. Consequently,
15 this increases effort on the foot brake pedal and also reduces the performance of the braking system which may prove hazardous and lead to road accidents which is not desirable.
In view of the above, a booster assembly for a braking system of a vehicle is disclosed. The booster assembly comprises of a housing and a diaphragm movably disposed within the housing
20 to bifurcate the housing to a first chamber and a second chamber. The first chamber is configured to receive fluid of a first pressure, and the second chamber is configured to receive fluid of a second pressure. A control housing is connected to the housing and is configured to movably accommodate a push rod. The push rod is connected to the diaphragm at one end and to a brake pedal at other end. A cover member is connected to the control housing and is defined
25 with at least one inlet to receive and dispense pressurized fluid into the second chamber. The pressurized fluid in the second chamber displaces the diaphragm from a first position to a second position to amplify force applied on the brake pedal to generate an increased brake force in the booster assembly. This configuration of the second chamber being filled with the pressurized fluid amplifies the force applied on the brake pedal to generate increased brake force with
30 improved braking efficiency. Further, the booster assembly can be installed in existing booster assemblies to improve braking efficiency. Also, the booster assembly of the present disclosure
8

is compact with few components. This significantly reduces cost of manufacturing the booster assembly.
5 The following paragraphs describe the present disclosure in detail with reference to Figs. 1 to 4. In the figures, the same element or elements which have similar functions are indicated by the same reference signs.
Referring to Fig. 1 which illustrates a schematic layout of a braking system [hereinafter referred
10 as “the system (100)”] having a booster assembly (200) [hereinafter referred to as “the assembly (200)”] in accordance with an embodiment of the present disclosure. The system (100) can be installed in commercial vehicles and/or trucks and/or passenger vehicles [hereinafter referred to as “the vehicle (200)”]. The system (100) comprises of a compressor (106) configured to generate a pressurized fluid of predetermined pressure. The compressor (106) is configured to receive the air
15 at an atmospheric pressure and compress the air to generate pressurized air having a predetermined pressure. The compressor (106) is fluidly connected to a drying unit (104). The drying unit (104) is configured to receive the pressurized air from the compressor (106) and process the pressurized air. The drying unit (104) removes moisture and other contaminants from the pressurized fluid to generate the pressurized fluid having a second pressure. The drying unit (104) is fluidly connected
20 to at least one storage tank (108). In an embodiment, at least one of a refrigerated air dryer, desiccant air dryer and membrane air dryers may be used as the drying unit (104). The pressurized fluid from the drying unit (104) is discharged into the at least one storage tank (108). The at least one storage tank (108) receives and stores the pressurized fluid having the second pressure. In an embodiment, there are two storage tanks (108) to store the pressurized fluid having the second
25 pressure. The at least one storage tank (108) is fluidly connected to a booster assembly. Further, a pressure regulator valve (109) is arranged between the at least one storage tank (108) and the booster assembly (102). The pressure regulator valve (109) is configured to supply and maintain the second pressure within the booster assembly (102). The booster assembly (102) is fluidly connected to a front brake unit (210) of the vehicle (200). In an embodiment, the booster assembly
30 (102) may be fluidly connected to the front brake unit (210) and a rear brake unit (212) of the vehicle (200). In a standard set-up, the front brake unit (210) is connected to a front wheels of the vehicle (200) and the rear brake unit (212) is connected to a rear wheels of the vehicle (200). In an
9

embodiment, the front brake unit (210) may include a disc-brake unit (not shown in Figs.), and the rear brake unit (212) may be equipped with a drum brakes (not shown in Figs.). However, this cannot be construed as limiting and any type of brakes may be equipped to the front and rear wheels of the vehicle (200) based on the requirement. 5
Referring to Fig. 2, the booster assembly (102) comprises a housing (112) and a diaphragm (114) movably disposed within the housing (112). The housing (112) is defined with an inlet (112a) and an outlet (112b). The housing (112) is defined in a rectangular cross-section or any suitable geometrical configuration. The diaphragm (114) is displaceable between a first position (FP) and
10 a second position (SP) within the housing (112). In an embodiment, the diaphragm (114) is structured in a disc shape profile having a diameter equal to the diameter of the housing (112) to secure with an inner wall of the housing (112). The diaphragm (114) bifurcates the housing (112) to a first chamber (116) and a second chamber (118) within the housing (112). In an embodiment, the first chamber (116) and the second chamber (118) are configured with equal volume, however
15 this cannot be construed as limiting and the volume of the first chamber (116) and the second chamber (118) may be varied based on the requirement. The first chamber (116) is configured to receive fluid of a first pressure. The first pressure is atmospheric pressure which is in a range of 1 to 2 bar. In an embodiment, the first chamber (116) is defined proximal to the outlet (112b) of the housing (112). The second chamber (118) is disposed opposite adjacent to the first chamber (116)
20 and proximal to the inlet of the housing (112). The second chamber (118) is configured to receive pressurized fluid having the second pressure. The second pressure is in a range of 2 to 8 bar. Further, a control housing (120) is connected to the housing (112) near the inlet (112a). The control housing (120) is defined with an opening (120a) at one end and other end of the control housing (120) is closed. The closed end of the control housing (120) is defined with a provision (120b).
25 The control housing (120) is defined with a diameter lesser than the diameter of the housing (112). The control housing (120) is configured to movably accommodate a push rod (122). The push rod (122) is connected to the diaphragm (114) at one end and extends through the provision (120b) to be connected to a brake pedal (124) at other end. A user/driver operates the brake pedal (124) to displace the diaphragm (114) between the first position (FP) and the second position (SP).
30
10

Referring to Fig. 3, the assembly (102) further comprises a cover member (117) mounted over the control housing (120). The cover member (117) is defined with a diameter slightly greater than the diameter of the control housing (120) to enclose the control housing (120). The cover member (117) is defined with a connector (117a) and a hub (117b) extending from the connector (117a). 5 The connector (117b) is fastened to on end of the housing (112) using suitable fasteners. The hub (117b) is defined with at least one inlet (204, 206) to receive and dispense the pressurized fluid into the second chamber (118). The hub (117b) is also defined with an aperture (120c) in line with the provision (102b) to receive the pushrod (122). The at least one inlet (204, 206) is fluidly connected to the pressure control valve (109) and the at least one storage tank (108). The pressure
10 control valve (109) maintains the pressurized fluid at the second pressure and dispenses into the second chamber (118) through the at least one inlet (204, 206). The pressurized fluid in the second chamber (118) displaces the diaphragm (114) from a first position (FP) to a second position (SP) to amplify force applied on the brake pedal (124) to generate an increased brake force in the booster assembly (102). An output shaft (130) is connected to the diaphragm (114) at one end and opposite
15 to the push rod (122). A resilient member (132) is mounted on the output shaft (130) to retract the
diaphragm (114) from the second position (SP) to the first position (FP). In an embodiment, the
output shaft (130) is disengaged from the master cylinder unit (126) in the first position (FP) and
engages with the master cylinder unit (126) in the second position (SP) to transfer the brake fluid
at a predefined pressure.
20
The present disclosure further comprises a master cylinder unit (126) connected to the outlet
(112b) of the booster assembly (102). The master cylinder unit (126) comprises of a fluid reservoir
(126a) to store a brake fluid or hydraulic fluid. A piston-cylinder unit (128) is positioned below
the fluid reservoir (126a). A piston (128a) is disposed inside the cylinder (128b) and connected to
25 the output shaft (130). The output shaft (130) is configured to actuate the piston (128a) upon
displacement of the diaphragm (114) between the first position (FP) and the second position (SP).
The master cylinder unit (128) is fluidly connected to an auxiliary booster assembly (110). An
outlet port (129) of the master cylinder unit (126) is connected to an inlet port (not shown in Figs.)
of the auxiliary booster assembly (110).
30
The auxiliary booster assembly (110) comprises of the components similar to the components of
the booster assembly (102). The auxiliary booster assembly (110) is fluidly connected to a front
11

brake unit (210) of the vehicle (200), The auxiliary booster assembly (110) receives the brake fluid with increased pressure from the outlet of the master cylinder unit (126) and further amplifies the brake fluid pressure to supply to the front brake unit (210). Therefore, the final brake fluid pressure is transmitted to the front brake unit (210) to improve the braking performance of the vehicle. 5 Simultaneously, the brake fluid with increased pressure from the booster assembly (102) is transmitted to the rear brake unit (212) for braking the vehicle (200).
Referring to Fig. 4 and Fig. 5, the booster assembly also comprises of a sealing unit (140) arranged within an opening (120a) of the control housing (120). The sealing unit (140) comprises of an
10 adapter (142) secured to an interface of the opening (120a) and the inlet of the housing (112). The adapter (142) is defined with the diameter equal to the diameter of the housing (112) to perfectly fit within the interface of the housing (112) and the control housing (120). The adapter (142) is structured in a hollow cylindrical configuration and is internally defined with at least one groove (not shown in Figs.). At least one sealing member (144) is disposed within the at least one groove
15 of the adapter (142). The at least one sealing member (144) is disposed between the adapter (142) and the push rod (122) to prevent ingress of fluid from an atmosphere into the control housing (120). In an embodiment, the at least one sealing member (144) may be an O-ring.
Now referring to Fig. 6, a method (300) of operation of the braking system (100) is explained. The
20 braking system (100) is installed in the vehicle (200) carrying heavy loads (as shown in Fig. 7).
The method comprises, initially supplying the compressed or pressurized air from the compressor
into the drying unit (104) at step 302. Further, at step 304, the drying unit (104) processes the
pressurized air by removing the moisture from the pressurized air and generates the pressurized
air having the second pressure. Upon applying force on the brake pedal (124) by the user, the push
25 rod (122) displaces the diaphragm from the first position (FP) towards the second position (SP) at
step 306. With the movement of the diaphragm (114), the volume of the second chamber (118)
increases and the pressurized air is supplied to the second chamber (118) of the booster assembly
(102) through the at least one inlet of the cover member (117). The pressurized air gets
accumulated in the second chamber (118). The pressurized air aids in developing amplified or
30 higher force for movement of the diaphragm (114). This amplification of force is achieved due to
the pressure difference between the atmospheric air (having the first pressure) in the first chamber
and the pressurized air (having the second pressure) in the second chamber (118). This generates
12

an increased brake force in the booster assembly (102) and the same is discharged from the booster assembly (102) to the master cylinder unit (126). The output shaft (130) of the booster assembly (102) actuates the piston (128a) of the master cylinder unit (126) to dispense the brake fluid at a predefined pressure into the rear brake unit (212) of the vehicle (200) for braking. Simultaneously, 5 a portion of the brake fluid having the predefined pressure from the master cylinder unit (110) is also dispensed to the front brake unit through the auxiliary booster assembly (110). The auxiliary booster assembly (110) is configured to further amplify the pressure of the brake force from the master cylinder unit (126) and supplies the brake force at amplified pressure to the front brake unit (210) of the vehicle (200) for braking the vehicle (200). In an embodiment, the predefined pressure 10 depends on the type of vehicle and is based on the second pressure of the pressurized air.
In an embodiment, a brake fluid reservoir (126a) may be fluidly connected to the master cylinder unit (126) to supply the brake fluid to the and the front brake unit (210) and the rear brake unit 15 (212).
In an embodiment, the pushrod (122) is mounted with a return spring (not shown in Figs.) to retract the push rod to its original position upon removal of force by the user.
20 In an embodiment, the fluid may be at least one of air and liquid.
In an embodiment, the booster assembly (102) can be installed in existing pneumatic braking systems of commercial and passenger vehicles.
25 The booster assembly (102) of the present disclosure is simple in construction and is retrofittable to any type of brake chambers operating on pneumatic or hydraulic working fluid.
The booster assembly (102) of the present disclosure includes a lesser number of components.
This reduces manufacturing and maintenance costs of the vehicle (200).
30
The booster assembly (102) of the present disclosure requires less effort from the user to operate
the brake pedal (124). Further, the effort on the brake pedal (124) is amplified due to the
13

presence of pressurized fluid of second pressure to generate increased brake force for braking of the vehicles carrying higher loads.
The booster assembly (102) of the present disclosure generates higher pressure with a smaller 5 pedal effort and smaller diaphragm of the booster assembly.
EQUIVALENTS
With respect to the use of substantially any plural and/or singular terms herein, those having 10 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.
While various aspects and embodiments have been disclosed herein, other aspects and 15 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.
Reference numerals:

20

Part Numeral
Braking system 100
Vehicle 200
Front brake unit 210
Rear brake unit 212
Method 300
Booster assembly 102
Drying unit 104
Compressor 106
At least one storage tank 108
Pressure regulator valve 109
Auxiliary booster assembly 110

14

Housing 112
Inlet 112a
Outlet 112b
Diaphragm 114
First chamber 116
Cover member 117
Connector 117a
Hub 117b
Second chamber 118
Control housing 120
Opening 120a
Provision 120b
Aperture 120c
Push rod 122
Brake pedal 124
Master cylinder unit 126
Fluid reservoir 126a
Piston cylinder unit 128
Piston 128a
Cylinder 128b
Output shaft 130
Resilient member 132
Sealing unit 140
Adapter 142
Sealing member 144
15

I/We Claim:
1. A booster assembly (102) for a braking system (100) of a vehicle (200), the booster
assembly (102) comprising:
a housing (112):
5 a diaphragm (114) movably disposed within the housing (112) to bifurcate the
housing (112) to a first chamber (116) and a second chamber (118), wherein the first chamber (116) is configured to receive fluid of a first pressure, and the second chamber (118) is configured to receive pressurized fluid of a second pressure;
a control housing (120) connected to the housing (112) and is configured to
10 movably accommodate a push rod (122), wherein the push rod (122) is connected to the
diaphragm (114) at one end and to a brake pedal (124) at an other end;
a cover member (117) connected to the control housing (120), the cover member
(117) is defined with at least one inlet (204, 206) to receive and dispense pressurized fluid
into the second chamber (118); and
15 the pressurized fluid in the second chamber (118) displaces the diaphragm
(114) from a first position (FP) to a second position (SP) to amplify force applied
on the brake pedal (124) to generate an increased brake force in the booster
assembly (102).
20 2. The booster assembly (102) as claimed in claim 1, comprises a sealing unit (140) arranged
within an opening (120a) of the control housing (120), wherein the sealing unit (140) comprises:
an adapter (142) secured to the opening (120a); and
at least one sealing member (144) connected to the adapter (142), wherein the at
25 least one sealing member (144) is disposed between the adapter (142) and the push rod
(122) to prevent ingress of fluid from an atmosphere into the control housing (120).
3. The booster assembly (102) as claimed in claim 1, comprises a master cylinder unit (126)
with a fluid reservoir (126a) and a piston-cylinder unit (128) to store and dispense a brake
30 fluid, wherein the master cylinder unit (126) is fluidly connected with the booster (102) to
supply the brake fluid at a predefined pressure to a front brake unit (208) and a rear brake
unit (212) of the vehicle (200).
16

4. The booster assembly (102) as claimed in claim 1, comprises an output shaft (130) centrally
connected to the diaphragm (114) and positioned opposite to the push rod (122), wherein
the output shaft (130) is configured to actuate a piston (128a) of the master cylinder unit
5 (126).
5. The booster assembly (102) as claimed in claim 1, comprises a resilient member (132)
mounted on the output shaft (130) to retract the diaphragm (114) from the second position
(SP) to the first position.
10
6. The booster assembly (102) as claimed in claim 1, wherein the first pressure is atmospheric
pressure in a range of 1 – 1.5 bar.
7. The booster assembly (102) as claimed in claim 1, wherein the second pressure is greater
15 than the first predetermined pressure and in a range of about 2 to 8 bar.
8. The booster assembly (102) as claimed in claim 4, wherein the output shaft (130) is
disengaged from the master cylinder unit (126) in the first position (FP) and engages with
the master cylinder unit (126) in the second position (SP) to transfer the brake fluid at the
20 predefined pressure.
9. A braking system (100) for a vehicle (200), the system (100) comprising:
a compressor (106) configured to generate a pressurized fluid of predetermined
pressure;
25 a drying unit (104) fluidly connected to the compressor (106), wherein the drying
unit (104) is configured to process the pressurized fluid from the compressor (106) to generate the pressurized fluid having a second predetermined pressure;
at least one storage tank (108) fluidly connected to the drying unit (104), the at
least one storage tank (108) receives and stores the processed pressurized fluid from the
30 drying unit (104);
a booster assembly (102) fluidly connected with the at least one storage tank (108), wherein the booster assembly (102) comprises:
a housing (112):
17

a diaphragm (114) movably disposed within the housing (112) to bifurcate
the housing (112) to a first chamber (116) and a second chamber (118), wherein the
first chamber (116) is configured to receive a fluid of a first pressure, and the second
chamber (118) is configured to receive pressurized fluid of a second pressure from
5 the at least one storage tank (108);
a control housing (120) connected to the housing (112) and is configured to movably accommodate a push rod (122), wherein the push rod (122) is connected to the diaphragm (114) at one end and to a brake pedal (124) at an other end;
a cover member (117) connected to the control housing (120), the cover
10 member (117) is defined with at least one inlet (204, 206) to receive and dispense
pressurized fluid into the second chamber (118);
the pressurized fluid in the second chamber (118) displaces the
diaphragm (114) from a first position (FP) to a second position (SP) to
amplify force applied on the brake pedal (124) to generate an increased
15 brake force in the booster assembly (102);
a master cylinder unit (126) fluidly connected to the booster assembly (102)
and a rear brake unit (212) of the vehicle (200), and configured to supply a brake
fluid at a predefined pressure to a rear brake unit (212) of the vehicle (200) for
braking; and
20 an auxiliary booster assembly (110) fluidly disposed between the master
cylinder unit (126) and a front brake unit (210) and configured to amplify and supply the brake fluid pressure to the front brake unit (210) for braking.
10. The system (100) as claimed in claim 9, comprises a sealing unit (140) arranged within an
25 opening (120a) of the control housing (120), wherein the sealing unit (140) comprises:
an adapter (142) secured to the opening (120a); and
at least one sealing member (144) connected to the adapter (142), wherein the at least one sealing member (144) is disposed between the adapter (142) and the push rod (122) to prevent ingress of fluid from an atmosphere into the control housing (120).

30

11. The system (100f) as claimed in claim 9, wherein the master cylinder unit (126) comprises a fluid reservoir and a piston-cylinder unit (128) to store and dispense brake fluid.
18

12. The system (100) as claimed in claim 9, comprises an output shaft (130) centrally
connected to the diaphragm (114) and positioned opposite to the push rod (122), wherein
the output shaft (130) is configured to actuate a piston (128a) of the master cylinder unit
5 (126).
13. The system (100) as claimed in claim 9, comprises a resilient member (132) mounted on
the output shaft (130) to retract the diaphragm (114) from the second position (SP) to the
first position (FP).
10
14. The system (100) as claimed in claim 12, wherein the output shaft (130) is disengaged with
the master cylinder unit (126) in the first position (FP) and engages with the master cylinder unit (126) in the second position (SP) to transfer the brake fluid at the predefined pressure.
15 15. A vehicle (200) comprising:
a braking system (100) fluidly connected to a front brake unit (210) and a rear brake unit (212) of the vehicle (200), the braking system (100) comprises:
a compressor (106) configured to generate a pressurized fluid having a
predetermined pressure;
20 a drying unit (104) fluidly connected to the compressor (106), the drying
unit (104) is configured to process the pressurized air from the compressor (106) to generate the pressurized air having a second predetermined pressure;
at least one storage tank (108) fluidly connected to the drying unit (104),
the at least one storage tank (108) receives and stores the processed pressurized
25 fluid from the drying unit (104);
a booster assembly (102) fluidly connected to the at least one storage tank (108), wherein the booster assembly (102) comprises: a housing (112):
a diaphragm (114) movably disposed within the housing (112) to
30 bifurcate the housing to a first chamber (116) and a second chamber (118),
wherein the first chamber (116) is configured to receive fluid of a first
19

pressure, and the second chamber (118) is configured to receive pressurized air having a second pressure from the at least one storage tank (108);
a control housing (120) connected to the housing (112) and is
configured to movably accommodate a push rod (122), wherein the push
5 rod (122) is connected to the diaphragm (114) at one end and to a brake
pedal (124) at an other end;
a cover member (116) connected to the control housing (120), the
cover member (116) is defined with at least one inlet (204, 206) to receive
and dispense the pressurized fluid into the second chamber (118);
10 the pressurized in the second chamber (118) displaces the
diaphragm (114) from a first position (FP) to a second position (SP) to amplify force applied on the brake pedal (124) to generate an increased brake force in the booster assembly (102);
a master cylinder unit (126) fluidly connected to the booster assembly (102)
15 and a rear brake unit (212), and configured to supply the brake fluid at a predefined
pressure to the rear brake unit (212) for braking; and
an auxiliary booster assembly (110) fluidly disposed between the master
cylinder unit (126) and the front brake unit (210) and configured to amplify the
pressure of the brake fluid and supply to the front brake unit (210) for braking the
20 vehicle (200).