FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10; rule 13] TITLE: “A VALVE UNIT”
Name and Address of the Applicant:
TATA MOTORS PASSENGER VEHICLES LIMITED; an Indian company having a registered address at Floor 3, 4, Plot-18, Nanavati Mahalaya, Mudhana Shetty Marg, BSE Fort, Mumbai, Mumbai City, Maharashtra, 400001.
Nationality: Indian
The following specification particularly describes the nature of the invention and the manner in which it is to be performed.

TECHNICAL FIELD
Present disclosure in general relates to the field of fluid mechanics and automobile engineering. Particularly, but not exclusively, the present disclosure relates to a fuel supply system. Further, embodiments of the disclosure, relates to a high-pressure gaseous fuel supply assembly for a vehicle.
BACKGROUND OF THE DISCLOSURE
Conventionally, vehicles such as, but not limiting to, passenger vehicles, light motor vehicles, heavy motor vehicles, sports utility vehicles, commercial vehicles, multi utility vehicles, amongst other vehicle are powered by gaseous fuel including, but not limited to, Liquid gasoline petroleum, Compressed Natural gas, biogas, hydrogen, and the like. Generally, such gaseous fuel is supplied to an engine of the vehicle under high-pressure, to improve formation of fuel mixture for combustion in the engine, and in-turn, improve efficiency of the engine. For such requirement, the gaseous fuel is generally contained in a fuel tank such as, a storage tank or a replaceable storage tank, through which such gaseous fuel is selectively supplied to the engine at a pre-set pressure.
The fuel tank is generally located away from the engine in the vehicle, while the gaseous fuel are suitably channelized to the engine by means including, but not limited to, conduits, pipes and other fluid supply means. Further, to channelize the gaseous fuel at the pre-set pressure, the fuel tank is fitted with regulatory means including a plurality of valves, stoppers, sealing means, regulators, stabilizers, filters, and among other components. With such configuration of the regulatory means, the fuel tank may be either be replaceable or re-filled and contained with the gaseous fuel at the defined high-pressure. However, with such variation in fuel tanks, the regulatory means may also require modifications in order to be retrofittable in vehicle, whereby inherently increases overall cost of the assembly.
With advent of technology, various systems and mechanisms have been developed for regulating pressure of the gaseous fuel from the fuel tank to the engine. In conventional arrangement, to improve safety factors associated with valves of the regulatory means, generally, channels may be defined relative to an inlet port and an outlet port associated with said valves. The channel may be defined proximal to at least one of the inlet port and the outlet port so that, during pressurizing, containing and/or discharge of the gaseous fuel into or out from the fuel tank, said channels may assist in venting out leaked gaseous fuel. Though

such proportion of leaked gaseous fuel may be low and negligible, such leakage may inherently lead to accidents in case of increased temperature and/or increased pressure in the valves of the fuel tank. Moreover, additional safety and/or regulatory devices to be supplemented in the valves of the fuel tank may be required to be installed, which may inherently increase complexity in manufacturing of said valves and may also compromise factor of safety associated the valve in assembling with the fuel tank in the vehicle. Furthermore, in conventional vehicles, dur to complex configuration and designing of the valves associated with the fuel tank of the gaseous fuel, any leakage in or from the fuel tank may contained within the vehicle. Such containing of the leaked gaseous fuel may also cause accidents which may lead to arcs and/or fire in the vehicle. Due to such compromised state of the conventional valves, modification and/or safety of the gaseous fuel and fuel system of the vehicle may be compromised.
The present disclosure is directed to overcome one or more limitations stated above or any other limitation associated with the conventional arts.
SUMMARY OF THE DISCLOSURE
One or more shortcomings of the prior art are overcome by a valve unit as described and additional advantages are provided through the valve unit as described 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 disclosure.
In one non-limiting embodiment of the disclosure, a valve unit of a fuel system for a vehicle is disclosed. The valve unit may include a valve body detachably connectable to a fuel tank of the fuel system. The valve body may be defined by a flow section fluidly coupled with the fuel tank. The flow section may include a fuel inlet port and a fuel outlet port being in fluid communication with the fuel inlet port through a first conduit. Further, the flow section may include a regulation unit configured to selective channelize the fuel between the fuel inlet port and the fuel outlet port along the first conduit. The regulation unit may be disposable in the first conduit. The valve body may be defined by a vent section adapted to be in fluid communication with the flow section. The vent section may include a plurality of vents defined along an axis parallel to a flow axis of the first conduit of the flow section. Each of

the plurality of vents may be configured to discharge the fuel from the flow section to the surrounding of the vehicle. Additionally, the vent section may include one or more sealing elements disposable between and adapted to fluidly connect the flow section and the vent section. The one or more sealing elements may be configured to rupture and channelize the fuel to flow from the flow section into the vent section.
In an embodiment of the disclosure, a knob detachably coupled to the regulation unit may be configured to selectively operate the regulation unit to channelize the fuel between the inlet port and the outlet port of the flow section, between a first condition and second condition.
In an embodiment of the disclosure, the first condition of the flow section corresponds to flow of fuel from the fuel tank to an engine of the vehicle.
In an embodiment of the disclosure, the second condition of the flow section corresponds to flow of fuel from a fuel source to the fuel tank.
In an embodiment of the disclosure, the plurality of vents comprises at least one pressure vent and at least one temperature vent.
In an embodiment of the disclosure, the vent section is defined with a second conduit, configured to fluidly connect the at least one pressure vent and at least one temperature vent, with the first conduit.
In an embodiment of the disclosure, the valve unit includes a discharge channel fluidly coupled to the first conduit and configured direct leaked fuel from the flow section to outside the vehicle.
In an embodiment of the disclosure, each of the at least one fuel inlet port, the fuel outlet port, the plurality of vents and the at least one discharge channel being defined in the valve body are enclosable by a hose, configured to channelize the fuel to the surrounding.
In an embodiment of the disclosure, the one or more sealing elements comprises at least one pressure based plug and at least one temperature based plug.
In an embodiment of the disclosure, the pressure based plug is at least one of rupture disk, a diaphragm, pressure transducer or a pressure relief valve.

In an embodiment of the disclosure, the temperature based plug is a fusible plug.
In one non-limiting embodiment of the disclosure, a vehicle is disclosed. The vehicle includes an engine disposable on a vehicle body and a fuel system of the vehicle configured to operatively dispense fuel between a fuel tank associated with the vehicle and the engine. The fuel system may also include valve unit fluidly coupled to the fuel tank. The valve unit may include a valve body detachably connectable to a fuel tank of the fuel system. The valve body may be defined by a flow section fluidly coupled between the fuel tank. The flow section may include a fuel inlet port and a fuel outlet port being in fluid communication with the fuel inlet port through a first conduit. Further, the flow section may include a regulation unit configured to selective channelize the fuel between the fuel inlet port and the fuel outlet port along the first conduit. The regulation unit may be disposable in the first conduit. The valve body may be defined by a vent section adapted to be in fluid communication with the flow section. The vent section may include a plurality of vents defined along an axis parallel to a flow axis of the first conduit of the flow section. Each of the plurality of vents may be configured to discharge the fuel from the flow section to the surrounding of the vehicle. Additionally, the vent section may include one or more sealing elements disposable between and adapted to fluidly connect the flow section and the vent section. The one or more sealing elements may be configured to rupture and channelize the fuel to flow from the flow section into the vent section.
It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form a further embodiment of the disclosure.
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 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 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 view of a vehicle employed with a valve unit, in accordance with an embodiment of the present disclosure.
Figure 2 illustrates a schematic view of the valve unit, in accordance with an embodiment of the present disclosure.
Figures 3a, 3b and 3c illustrate various views of a valve body of the valve unit, in accordance with an embodiment of the present disclosure.
Figures 4a and 4b illustrate a sectional view of the valve body of Figures 3a-3c, 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 mechanism and assembly illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. Additional features and advantages of the disclosure will be described hereinafter which form the subject of the claims of the disclosure. It should be appreciated by those skilled in the art that the conception and specific embodiments disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. It should also be realized by those skilled in the art that such equivalent processes do not depart from the scope of the disclosure as set forth in the appended claims. The novel features which are believed to be characteristic of the disclosure, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure. It will be readily understood

that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, and designed in a wide variety of different configurations, all of which are explicitly contemplated and make part of this 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 unit, a device, an 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 unit proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the valve unit.
Embodiments of the present disclosure discloses a valve unit. The valve unit comprising a valve body, defining at least one fuel inlet port and fuel outlet port, at least one discharge channel and a plurality of vents defined about each of the at least one fuel inlet port and the fuel outlet port. One of the plurality of vents being defined substantially parallel to the at least one fuel inlet port and the fuel outlet port. Moreover, the at least one fuel inlet port and the fuel outlet port are configured to channelize gaseous fuel through the valve body, where the valve body being defined with a connecting portion to connect and secure with a fuel tank. Further, the at least one discharge channel being fluidly connected to each of the at least one fuel inlet port and the fuel outlet port. The valve unit further includes at least one knob, detachably coupled to the valve body. The at least one knob being operable to select flow of a fluid between the at least one fuel inlet port and the fuel outlet port. The valve unit also includes a cavity, being adaptably sealed at one or more sealing elements. The cavity being defined in the valve body at a section opposite to and away from the at least one knob. Such configuration of the valve unit may be adapted to divert, and discharge leaked gaseous fuel away from compartments and diffuse into the surrounding. Also, such configuration of the valve unit enables ease of assembling and positioning relative to a fuel tank and channelizing of the gaseous fuel through the valve unit.
In an embodiment, the term “gaseous fuel” may be referred to any fuel that may be either stored or supplied to an engine of a vehicle in a gaseous form. The gaseous fuel may be including, but not limited to, Liquid gasoline petroleum, Compressed Natural gas, biogas, hydrogen, and any other fuel that may be supplied to the engine in gaseous form.

In an embodiment, the term “fuel tank” may be referred to any storage tank capable of receiving and containing fuel in at a high-pressure and supply such fuel to the engine of the vehicle in gaseous form. The fuel tank may be made from rigid material including, but not limited to, metals, alloys, carbon fibre, powdered metallurgical material and any other material capable of containing the fuel at high-pressure. The fuel tank may be fitted in the vehicle or may be replaceable when the fuel contained therein is exhausted.
Embodiments of the disclosure are described in the following paragraphs with reference to Figures 1 to 4b. In the figures, the same element or elements which have same functions are indicated by the same reference signs. It is to be noted that, the vehicle illustrated is for reference only and that the application of the present disclosure may not be intended to be limitations to “the vehicle” based on which a person of skill may envisage description and details of the valve unit in the figures being illustrated herein for the purpose of simplicity. One skilled in the art would appreciate that the valve unit as disclosed in the present disclosure may also be used in any vehicle including, but not liming to, passenger cars, heavy motor vehicles, light motor vehicles, commercial vehicles, and among others.
Figure 1 is an exemplary embodiment depicting a vehicle operable by a gaseous fuel. The vehicle includes a fuel tank (101) which may be connectable to an engine [not shown in figures] associated with the vehicle for operations including propulsion, navigation, air conditioning and among other operations being capable thereof. The fuel tank (101) and the engine of the vehicle may be connectable through a high-pressure fuel supply assembly or alternatively termed as fuel system. The fuel system may be configured to channelize and supply the gaseous fuel from the fuel tank (101) to the engine. Fuel system may be configured to supply the gaseous fuel at a predefined pressure either directly to the engine and to an inlet manifold of the engine. Fuel system may include components such as, but not limited to, a filter, a regulator, and the like, along with a valve unit (10), configured to channelize the gaseous fuel to and from the fuel tank (101) of the vehicle. In an embodiment, the gaseous fuel may be supplied and contained in the fuel tank (101) at a predefined pressure, which may be in a range of 50-650 bars and the same shall not be construed as a limitation, based on number of factors such as type of gaseous fuel, nature of sealants in the high-pressure fuel supply assembly, and among others.
Further, to control, flow of the gaseous fuel to and from the fuel tank (101), the valve unit (10) of the high-pressure fuel supply assembly may integrally or detachably be connected to

the fuel tank (101). The valve unit (10) may be configured to selectively channelize the flow of the gaseous fuel from an outside source to the fuel tank (101), and that the gaseous fuel from the fuel tank (101) to the engine. i.e., the valve unit (10) being capable of restricting flow of the gaseous fuel between the fuel tank (101) and the engine when the gaseous fuel may be supplied from the outside source to the fuel tank (101), and vice versa. In the illustrative embodiment, the valve unit (10) comprises a valve body (1) and a hose (2c) being connectable to the valve body (1), configured to channelize the gaseous fuel between said source, the fuel tank (101), the engine and to the surrounding of the vehicle, as best seen in Figure 2. The valve body (1) may be defined by a flow section (102) [best seen in Figure 4a] and a vent section (103) [best seen in Figure 4b]. The flow section (102) may be fluidly coupled to the fuel tank (101). The flow section (102) may be configured to channelize flow of fuel between an outside fuel source and fuel tank (101) as well as between the fuel tank (101) and the engine of the vehicle. The vent section (103) may include a pressure vent (11) and a temperature vent (12). The pressure vent (11) may be in fluidic communication with the temperature vent (12) through a second conduit (14).
Referring to Figures 3a and 3b, the flow section (102) of the valve body (1) may include a fuel inlet port (2a) and a fuel outlet port (2b). The fuel outlet port (2b) may be in fluidic communication with the fuel inlet port (2a) through a first conduit (13). The fuel inlet port (2a) and the fuel outlet port (2b) are defined to structurally extend from the valve body (1) and project laterally outward from the valve body (1). In an embodiment, the fuel inlet port (2a) and the fuel outlet port (2b) may be interchangeable based on orientation of the valve unit (10), for selectively connecting the outside source, the fuel tank (101) and the engine. Further, the flow section (102) may include a regulation unit [not shown in figures] disposed in the first conduit (13). The regulation unit may be configured to selectively channelize the fuel between the fuel inlet port (2a) and the fuel outlet port (2b). In an embodiment, the regulation unit may be at least one of but not limited to perforated ball, pivotable disk, plug or diaphragm. As an example, during filling of fuel to the fuel tank (101) from an external/ outside fuel source, the regulation unit may be operated as a ball valve, where a ball of the ball valve may include perforations positioned perpendicular to each other and configured to channelize the fuel to the fuel tank (101) during filling of fuel to the fuel tank. Further, the ball may be rotated either in clockwise or anticlockwise to channelize fuel between the fuel tank (101) and the engine of the vehicle. It is to be noted that such operations may performed by any one of but not limited to pivotable disk, plug or a diaphragm.

Referring again to Figure 3a and Figure 3b, the fuel inlet port (2a) and the fuel outlet port (2b) may be operable based on at least one knob (6), which may be detachably coupled to the regulation unit. The at least one knob (6) being operable to select flow of a fluid between the fuel inlet port (2a) and the fuel outlet port (2b), where the fuel inlet port (2a) and the fuel outlet port (2b) are configured to channelize gaseous fuel through the valve body (1). The at least one knob (6) may be configured to selectively operate the regulation unit to channelize the fuel between the fuel inlet port (2a) and the fuel outlet port (2b) of the flow section (102) between a first condition and a second condition. For instance, the first condition of the flow section (102) may correspond to flow of fuel from the fuel tank (101) to the engine of the vehicle. The second condition of the flow section (102) may correspond to flow of fuel from a fuel source to the fuel tank (101). Further, to supply the gaseous fuel to and from the fuel tank (101), the valve body (1) may be defined with a connecting portion (5) to connect and secure with the fuel tank (101). It is to be noted that number of connecting portion (5) being defined may be dependent on the fuel inlet port (2a), number of fuel tank (101), and the like. In an embodiment, the at least one knob (6) and the at least one connecting portion (5) of the valve body (1) may be normally oriented, as best seen in Figure 3c. Such positioning of the at least one knob (6) and the at least one connecting portion (5) may be varied based on structure and configuration of the valve body (1) and positioning of the valve unit (10) relative to the fuel tank (101).
Referring to Figures 4a and 4b, the valve body (1) may include a vent section (103) [best seen in Figure 4b] adapted to be in fluidic communication with the flow section (102). The vent section (103) may include a plurality of vents (4) defined along an axis parallel to a flow axis of the first conduit of the flow section. Each of the plurality of vents (4) may be configured to discharge the fuel from the flow section (102) to the surrounding of the vehicle. In an embodiment, each of the fuel inlet port (2a), the fuel outlet port (2b), the plurality of vents (4) and the at least one discharge channel (3) being defined in the valve body (1) are enclosable by a hose (2c), configured to channelize the gaseous fuel to the surrounding. The vents (4) of the plurality of vents (4) in the valve body (1) may be defined substantially parallel to the fuel inlet port (2a) and the fuel outlet port (2b). The plurality of vents (4) may be machined parallel or substantially parallel to the fuel inlet port (2a) and the fuel outlet port (2b) so that, assembling of the valve unit (10) relative to the fuel tank (101) and diffusing of the gaseous fuel leaked thereto may be diffused away from the fuel tank (101). Such

configuration of the at least one vent of the plurality of vents (4) may be configured to selectively channelize the gaseous fuel out from the valve unit (10), in case of incidents such as thermal-based and/or pressure-based accidents.
Referring to Figure 4b, the vent section may include a cavity being defined in the valve body (1) at a position opposite to and away from the at least one knob (6). The cavity may include one or more sealing elements (7) which may be at least one of a pressure-based plug (8) and a temperature-based plug (9), which may be selectively insertable into the cavity of the valve body (1). In an embodiment, the pressure-based plug (8) may be including, but not limited to, a rupture disk, a diaphragm, a pressure transducer, a pressure relief valve, and among others. Further, the pressure-based plug (8) may be adapted to allow flow of the gaseous fuel during venting out from the fuel tank (101) via the valve unit (10), in case pressure inside the fuel tank (101) exceeds the predetermined pressure. In such condition, the pressure vent (11) may channelize/direct the pressurised gaseous fuel to an outside portion/surrounding of the vehicle. In an embodiment, the pressure-based plug (8) may include a metallic disc or a non-metallic membrane, which may be capable of bursting beyond the predetermined pressure. In an embodiment, the predetermined pressure may correspond to characteristics of the pressure based plug (8) and operating parameters of the valve unit (10). The characteristics of the pressure based plug (8) may include material of construction of any one of but not limited to a rupture disk, a diaphragm, a pressure transducer, a pressure relief etc. The operating parameters of the valve unit (10) may include fuel tank (101) dimension, material of construction of fuel tank (101), nature of fuel, vehicle load, and among others. In an embodiment, the temperature-based plug (9) may be a fusible plug, which may be configured to allow venting off of the gaseous fuel from the fuel tank (101) to the surrounding via the temperature vent (12) in case temperature about the valve unit (10) increases beyond a predefined temperature , which may in-turn cause pressure build-up in the fuel tank (101). In an embodiment, the predefined temperature may correspond to characteristics of the temperature based plug (9) and operating parameters of the valve unit (10). The characteristics of the temperature based plug (9) may include material of construction of the temperature based plug (9b). The operating parameters of the valve unit (10) may include fuel tank (101) dimension, material of construction of fuel tank (101), nature of fuel, vehicle load, and among others. In an embodiment, the temperature-based plug (9) may be selected from at least one of a metal, an alloy, and the like, which may be configured to melt at a predefined temperature and form a passage along one of the plurality of vents (4) for

escapement of the gaseous fuel. The temperature-based plug (9) may also be selected from shape-memory alloys or polymeric membranes which may be configured to melt based in variation in temperature.
In an embodiment, the valve body (1) may be defined with a gallery, to fluidly connect the cavity and the plurality of vents (4) such that, upon operation of the one or more sealing members in the cavity, the gaseous fuel may vent out along the plurality of vents (4) and not discharge through any of the fuel inlet port (2a), the fuel outlet port (2b), the at least one discharge channel (3) or the cavity.
Referring back to Figure 3b, the valve body (1) may include at least one discharge channel (3) defined about each of the fuel inlet port (2a) and the fuel outlet port (2b). The at least one discharge channel (3) being fluidly connected to each of the fuel inlet port (2a) and the fuel outlet port (2b). In an embodiment, the at least one discharge channel (3) may be structured to be of minimal dimension, which may range up to 0.1µm, for selectively channelizing the gaseous fuel leaked from the valve body (1) during selection between the fuel inlet port (2a) and the fuel outlet port (2b) via the at least one knob (6). In an embodiment, the at least one discharge channel (3) may be machined or formed during casting and/or manufacturing of the valve body (1). The at least one discharge channel (3) may be substantially normal to a portion of the fuel inlet port (2a) and the fuel outlet port (2b), where the at least one discharge channel (3) may be defined at an angle between 60-120deg relative to each of the fuel inlet port (2a) and the fuel outlet port (2b). In an embodiment, the at least one discharge channel (3) may be operational for a defined volume of the gaseous fuel, while such discharge channel (3) may be configured to generate noise that may act as indication pertaining to abrupt leakage from the fuel tank (101) or in the high-pressure fuel supply assembly. Such noise may alert a user on potential leakage which may be caused by pressure-based or temperature-based incidents in the high-pressure fuel supply assembly.
Embodiments of the present disclosure may be employed to assist discharge of fuel upon increase in pressure or temperature above a predetermined amount. Such discharge of fuel may prevent damages/injuries/fatality dues to overheating or increase in pressure of the fuel tank. The one or more sealing elements (7) may be configured to selectively restrict flow of the gaseous fuel from the fuel inlet port (2a) to the fuel outlet port (2b). The one or more sealing elements (7) may define a bypass passage on deformation, to channelize the gaseous fuel along at least one of the plurality of vents (4) and the at least one discharge channel (3).

Also, such configuration of the valve unit (10) enables ease of assembling and positioning relative to a fuel tank (101) and channelizing of the gaseous fuel through the valve unit (10). Further, the configuration of the regulation unit minimizes need for additional conduits for connectivity between an external fuel source and the fuel tank and fuel and the engine of the vehicle.
It is to be noted that, the vehicle illustrated is for reference only and that the application of the present disclosure may not be intended to be limitations to “the vehicle”, rather such features of the present disclosure may extend to other industrial applications including, thermal power plants, hydro power plants, industrial boilers, and amongst other applications which may be envisaged based on description and details of the valve unit (10) in the figures being illustrated herein for the purpose of simplicity. One skilled in the art would appreciate that the valve unit (10) as disclosed in the present disclosure may also be used in any vehicle including, but not limiting to, passenger cars, heavy motor vehicles, light motor vehicles, commercial vehicles, and among others.
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.

Referral Numerals:

Referral Numerals Description
1 Valve body
2a Fuel inlet port
2b Fuel outlet port
2c Hose
3 Discharge channel
4 Vents
5 Connecting portion
6 Knob
7 Sealing elements
8 Pressure based plug
9 Temperature based plug
10 Valve unit
11 Pressure vent
12 Temperature vent
13 First conduit
14 Second conduit
100 Flow section
101 Fuel tank
102 Flow section
103 Vent section

We Claim:
1. A valve unit (10) of a fuel system for a vehicle, the valve unit (10) comprising:
a valve body (1) detachably connectable to a fuel tank (101) of the fuel system, the valve body (1) being defined by:
a flow section (102), fluidly coupled to the fuel tank (101), the flow section (102) comprising:
a fuel inlet port (2a) and a fuel outlet port (2b) being in fluid
communication with the fuel inlet port (2a) through a first conduit
(13); and
a regulation unit configured to selective channelize the fuel
between the fuel inlet port (2a) and the fuel outlet port (2b) along the
first conduit (13), the regulation unit being disposable in the first
conduit; and
a vent section (103) adapted to be in fluid communication with the flow section, the vent section (103) comprising a plurality of vents (4) defined along an axis parallel to a flow axis of the first conduit of the flow section (102), each of the plurality of vents configured to discharge the fuel from the flow section to the surrounding of the vehicle; and
wherein the vent section (103) comprising one or more sealing elements (7), being disposable between and adapted to fluidly connect the flow section (102) and the vent section (103) , the one or more sealing elements (7) configured to rupture and channelize the fuel to flow from the flow section into the vent section (103) .
2. The valve unit (10) as claimed in claim 1, comprises a knob (6) detachably coupled to the regulation unit, wherein the knob configured to selectively operate the regulation unit to channelize the fuel between the first inlet port and the first outlet port of the flow section (102), between a first condition and second condition.
3. The valve unit (10) as claimed in claim 2, wherein the first condition of the flow section (102) corresponds to flow of fuel from the fuel tank (101) to an engine of the vehicle.
4. The valve unit (10) as claimed in claim 2, wherein the second condition of the flow section (102) corresponds to flow of fuel from a fuel source to the fuel tank (101).

5. The valve unit (10) as claimed in claim 1, wherein the plurality of vents (4) comprises at least one pressure vent (11) and at least one temperature vent (12).
6. The valve unit (10) as claimed in claim 1, wherein the vent section (103) is defined with a second conduit (14), configured to fluidly connect the at least one pressure vent (11) and at least one temperature vent (12), with the first conduit (13).
7. The valve unit (10) as claimed in claim 1, comprises at least one discharge channel (3) fluidly coupled to the first conduit (13) and configured direct leaked fuel from the flow section (102) to surrounding of the vehicle.
8. The valve unit (10) as claimed in claim 1, wherein each of the fuel inlet port (2a), the fuel outlet port (2b), the plurality of vents (4) and the at least one discharge channel (3) being defined in the valve body (1) are enclosable by a hose (2c), configured to channelize the fuel to the surrounding.
9. The value unit (10) as claimed in claim 1, wherein the one or more sealing elements (7) comprises at least one pressure based plug (8) and at least one temperature based plug (9).
10. The valve unit (10) as claimed in claim 9, wherein the pressure based plug (8) is at least one of rupture disk, a diaphragm, pressure transducer or a pressure relief valve.
11. The valve unit (10) as claimed in claim 9, wherein the temperature based plug (9) is a fusible plug.
12. A vehicle comprising
an engine disposable on a vehicle body;
a fuel system of the vehicle configured to operatively dispense fuel between a
fuel tank (101) associated with the vehicle and the engine, the fuel system
comprising:
a valve unit (10) fluidly coupled to the fuel tank (101), the valve unit (10) comprising:
a valve body (1) detachably connectable to a fuel tank (101) of
the fuel system, the valve body (1) being defined by:

a flow section (102), fluidly coupled to the fuel tank (101), the flow section (102) comprising:
a fuel inlet port (2a) and a fuel outlet port (2b) being in fluid communication with the fuel inlet port (2a) through a first conduit (13); and
a regulation unit configured to selective
channelize the fuel between the fuel inlet port (2a) and
the fuel outlet port (2b) along the first conduit (13), the
regulation unit being disposable in the first conduit; and
a vent section (103) adapted to be in fluid
communication with the flow section, the vent section (103)
comprising a plurality of vents (4) defined along an axis
parallel to a flow axis of the first conduit of the flow section
(102), each of the plurality of vents configured to discharge the
fuel from the flow section to the surrounding of the vehicle;
and
wherein the vent section (103) comprising one or more sealing elements (7), being disposable between and adapted to fluidly connect the flow section (102) and the vent section (103) , the one or more sealing elements (7) configured to rupture and channelize the fuel to flow from the flow section into the vent section (103) .