Claims:1. An air intake system (100) for an engine (104) of a vehicle, comprising:

a primary air intake duct (101);
an auxiliary air intake duct (102), fluidly coupled to the primary air intake duct (101), wherein the auxiliary air intake duct (102) is configured to supply air from at least one auxiliary source (103) into the engine (104);
a float chamber (105) disposed within the primary air intake duct (101), wherein the float chamber (105) is configured to selectively block the primary air intake duct (101) to prevent entry of liquid (117) into the engine (104), through the primary air intake duct (101); and
a vacuum sensing valve (106), disposed at a connection junction of the auxiliary air intake duct (102) and the primary air intake duct (101), wherein the vacuum sensing valve (106) is configured to selectively allow flow of air from the auxiliary air intake duct (102) into the primary air intake duct (101), when the air intake of the primary air intake duct (101) is blocked by the float chamber (105).

2. The air intake system (100) as claimed in claim 1, wherein the auxiliary air intake duct (102) is fluidly connected to the primary air intake duct (101), proximal to an intake manifold (107) of the engine (104) and downstream of the float chamber (105).

3. The air intake system (100) as claimed in claim 1, wherein the at least one auxiliary source (103) is one of an air conditioning unit and a cabin of the vehicle.

4. The air intake system (100) as claimed in claim 1, wherein the float chamber (105) includes a float (108), that imparts buoyancy characteristics when contacted by liquid (117), to block the primary air intake duct (101).

5. The air intake system (100) as claimed in claim 1, wherein the primary air intake duct (101) is defined with one or more holes (109), wherein each of the one or more holes (109) are adapted to drain liquid (117).

6. An exhaust system (200) for an engine (104) of a vehicle, comprising:
an exhaust duct (111);
at least one non-return valve (112) operably disposed within the exhaust duct (111), wherein the at least one non-return valve (112) is configured to selectively block the exhaust duct (111) to prevent entry of liquid (117) into the engine (104) through the exhaust duct (111); and
at least one pressure release valve (113) disposed in the exhaust duct (111), wherein the at least one pressure release valve (113) is configured to vent exhaust gas from the engine (104), when the exhaust duct (111) is blocked by the at least one non-return valve (112).

7. The exhaust system (200) as claimed in claim 6, wherein the at least one pressure release valve (113) is configured to vent exhaust gas from the engine (104), when pressure within the exhaust duct (111) exceeds threshold pressure.

8. The exhaust system (200) as claimed in claim 6, wherein the at least one non-return valve (112) is configured to block the exhaust duct (111), when pressure of liquid (117) entering the exhaust duct (111) exceeds pressure of the exhaust gas from the engine (104).

9. The exhaust system (200) as claimed in claim 6, wherein the exhaust duct (111) is defined with one or more holes (114), wherein each of the one or more holes (114) are configured to drain liquid (117).

10. A vehicle comprising an air intake and exhaust system (200), comprising:
a primary air intake duct (101);
an auxiliary air intake duct (102), fluidly coupled to the primary air intake duct (101), wherein the auxiliary air intake duct (102) is configured to supply air from at least one auxiliary source (103) into the engine (104);
a float chamber (105) disposed within the primary air intake duct (101), wherein the float chamber (105) is configured to selectively block the primary air intake duct (101) to prevent entry of liquid (117) into the engine (104), through the primary air intake duct (101);
an exhaust duct (111);
at least one non-return valve (112) operably disposed within the exhaust duct (111), wherein the at least one non-return valve (112) is configured to selectively block the exhaust duct (111) to prevent entry of liquid (117) into the engine (104) through the exhaust duct (111); and
at least one pressure release valve (113) disposed in the exhaust duct (111), wherein the at least one pressure release valve (113) is configured to vent exhaust gas from the engine (104), when the exhaust duct (111) is blocked by the at least one non-return valve (112).

11. The vehicle as claimed in claim 10, wherein the system (200) comprises a vacuum sensing valve (106), disposed at a connection junction of the auxiliary air intake duct (102) and the primary air intake duct (101), wherein the vacuum sensing valve (106) is configured to selectively allow flow of air from the auxiliary air intake duct (102) into the primary air intake duct (101), when the air intake of the primary air intake duct (101) is blocked by the float chamber (105).

12. The vehicle as claimed in claim 10, wherein the float chamber (105) includes a float (108) that imparts buoyancy characteristics when contacted by liquid, to block the primary air intake duct (101).

13. The vehicle as claimed in claim 10, wherein the at least one auxiliary source (103) is one of an air conditioning unit and a cabin of the vehicle.

14. The vehicle as claimed in claim 10, wherein the auxiliary air intake duct (102) is fluidly connected to the primary air intake duct (101), proximal to an intake manifold (107) of the engine (104) and downstream of the float chamber (105).

15. The vehicle as claimed in claim 10, wherein the at least one pressure release valve is positioned proximal to an exhaust manifold (110) of the engine (104).

16. The vehicle as claimed in claim 10, wherein the primary air intake duct (101) and the exhaust duct (111) are defined with one or more holes, wherein each of the one or more holes are adapted to drain liquid (117).
, Description:[001] TECHNICAL FIELD

[002] Present disclosure generally relates to a field of automobiles. Particularly, but not exclusively, the present disclosure relates to an air intake system and an exhaust system for an internal combustion engine of a vehicle. Further, embodiments of the present disclosure disclose the air intake system and the air exhaust system, configured to prevent entry of liquid into the engine during water wading or flooded conditions, and operate the engine in ON condition.

[003] BACKGROUND OF THE DISCLOSURE

[004] Internal combustion engines (hereinafter referred to as engine) are designed to oxidize fuel with the addition of air, and convert the energy released into mechanical power (speed, torque). Generally, internal combustion engines include an air intake duct and an exhaust duct, which allows flow of air into the engine and vents out exhaust gases from the engine, respectively. For smooth functioning of the engine, the air supplied through the air intake duct into the engine must meet certain requirements in terms of quality and quantity, and the exhaust gases generated as a result of combustion of the air-fuel mixture in the engine has to be vented from the engine in order to avoid back pressures and damage to the engine.

[005] One of the common problems in supplying air through the air intake duct and venting out the exhaust gases through the exhaust duct, is entry of liquid into the air intake duct and the exhaust duct. This scenario is more applicable where the vehicle is waded through water in flooded areas or in flood affected terrains. The liquid such as water, enters through either of the air intake duct and the exhaust duct and then into the engine, which may lead to damages such as water-hammering and, may even result in hydro-locking of the engine, which is undesired.

[006] Considering the above, and with the advent of technology, a system for preventing entry of liquid into the engine through the air intake duct and the exhaust duct have been developed and employed in the vehicles. One such technique includes disposing valves and liquid detection sensors in the air intake duct and the exhaust duct. The valves in the air intake duct and the exhaust duct, operate to a closed position, upon detection of liquid entry into the air intake duct and the exhaust duct. The closed position of the valves prevents entry of liquid into the engine, through the air intake duct and the exhaust duct. In some conventional configurations snorkels are employed in vehicles such as off-road vehicles which regularly wade into flooded terrains in order to by-pass the suction of air. However, such snorkels are limited to only off-road vehicles and may not be entirely suited for passenger cases due to its aesthetic appearance and bulkiness. However, conventional techniques along with preventing entry of liquid into the engine, also prevent entry of air through the intake duct and venting of exhaust gases through the exhaust duct from the engine. This results in stalling of the engine, which is undesired. Particularly, when the vehicle is operating through water or flood affected terrain or in parked condition, the conventional techniques, along with preventing entry of the liquid into the engine, also prevent entry of air into the engine and venting of exhaust gases from the engine, resulting in stalling of the engine and, thus the vehicle.

[007] The present disclosure is directed to overcome one or more limitations stated above or other such limitations associated with the prior art.

[008] SUMMARY OF THE DISCLOSURE

[009] One or more shortcomings of conventional systems are overcome, and additional advantages are provided through the system as claimed in the present disclosure. Additional features and advantages are realized through an air intake system and an exhaust system of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered as a part of the claimed disclosure.

[010] In one non-limiting embodiment of the disclosure, an air intake system for an engine of a vehicle is disclosed. The air intake system includes a primary air intake duct and an auxiliary air intake duct, fluidly coupled to the primary air intake duct. The auxiliary air intake duct is configured to supply air from at least one auxiliary source into the engine. Further, the air intake system includes a float chamber disposed within the primary air intake duct, wherein the float chamber is configured to selectively block the primary air intake duct to prevent entry of liquid into the engine, through the primary air intake duct. Furthermore, the air intake system includes a vacuum sensing valve, disposed at a connection junction of the auxiliary air intake duct and the primary air intake duct. The vacuum sensing valve is configured to selectively allow flow of air from the auxiliary air intake duct into the primary air intake duct, when the air intake of the primary air intake duct is blocked by the float chamber.

[011] In an embodiment of the disclosure, the auxiliary air intake duct is fluidly connected to the primary air intake duct, proximal to an intake manifold of the engine and downstream of the float chamber, and the at least one auxiliary source is at least one of an air conditioning unit and a cabin of the vehicle.

[012] In an embodiment of the disclosure, the float chamber includes a ball disposed in the float chamber, that imparts buoyancy characteristics when contacted by liquid, to block the primary air intake duct.

[013] In an embodiment of the disclosure, the primary air intake duct is defined with one or more holes, wherein each of the one or more holes are adapted to drain liquid.

[014] In another non-limiting embodiment of the present disclosure an exhaust system for an engine of a vehicle is disclosed. The exhaust system includes an exhaust duct, at least one non-return valve and at least one pressure release valve, disposed within the exhaust duct. The at least one non-return valve is configured to selectively block the exhaust duct to prevent entry of liquid into the engine through the exhaust duct, and the at least one pressure release valve is configured to vent exhaust gas from the engine, when the exhaust duct is blocked by the at least one non-return valve.

[015] In an embodiment of the disclosure, the at least one pressure release valve is configured to vent exhaust gas from the engine, when pressure within the exhaust duct exceeds threshold pressure.

[016] In an embodiment of the disclosure, the at least one non-return valve is configured to block the exhaust duct, when pressure of liquid entering the exhaust duct exceeds pressure of the exhaust gas from the engine.

[017] In an embodiment of the disclosure, the exhaust duct is defined with one or more holes, wherein each of the one or more holes are configured to drain liquid.

[018] In yet another non-limiting embodiment of the present disclosure, an air intake and an exhaust system for an engine of a vehicle disclosed. The system includes a primary air intake duct and an auxiliary air intake duct, which is fluidly coupled to the primary air intake duct. The auxiliary air intake duct is configured to supply air from at least one auxiliary source into the engine. Further, the system includes a float chamber disposed within the primary air intake duct. The float chamber is configured to selectively block the primary air intake duct to prevent entry of liquid into the engine, through the primary air intake duct. Additionally, the system includes an exhaust duct, at least one non-return valve and at least one pressure release valve disposed in the exhaust duct. The at least one non-return valve is configured to selectively block the exhaust duct to prevent entry of liquid into the engine through the exhaust duct. The at least one pressure release valve is configured to vent exhaust gas from the engine, when the exhaust duct is blocked by the at least one non-return valve.

[019] In an embodiment of the disclosure, the system comprises a vacuum sensing valve, disposed at a connection junction of the auxiliary air intake duct and the primary air intake duct, wherein the vacuum sensing valve is configured to selectively allow flow of air from the auxiliary air intake duct into the primary air intake duct, when the air intake of the primary air intake duct is blocked by the float chamber.

[020] 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.

[021] 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.

[022] BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS

[023] The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an embodiment when read in con-connection junction with the accompanying drawings. One or 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:

[024] Figure. 1 illustrates a schematic view of an air intake system for an engine of a vehicle, in accordance with an embodiment of the present disclosure;

[025] Figure. 2 illustrates a schematic view of the air intake system for the engine of Figure. 1, with liquid flooded in an air intake duct;

[026] Figures. 3 illustrates a schematic view of an exhaust system for the engine of the vehicle, in accordance with an embodiment of the present disclosure;

[027] Figures. 4 illustrates a schematic view of the exhaust system for the engine of Figure.3 with liquid flooded into an exhaust muffler;

[028] Figures. 5 illustrates a schematic view of an air intake system and an air exhaust system for the engine of the vehicle, in accordance with an embodiment of the present disclosure; and

[029] Figures. 6 illustrates a schematic view of the air intake system and the exhaust system for the engine of Figure. 5, with liquid filled in the air intake system and the exhaust system.

[030] 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 structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

[031] DETAILED DESCRIPTION

[032] While the embodiments in 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 alternative falling within the scope of the disclosure.

[033] It is to be noted that a person skilled in the art would be motivated from the present disclosure and modify various features of the system, without departing from the scope of the disclosure. Therefore, such modifications are considered to be part of the disclosure. Accordingly, the drawings show only those specific details that are pertinent to 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 skilled in the art having benefit of the description herein. Also, the system of the present disclosure may be employed in variety of engines having different specification. However, neither the engine nor the complete vehicle is illustrated in the drawings of the disclosure for the purpose of simplicity.

[034] The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that the system 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, method, or assembly, or device. In other words, one or more elements in a system or device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device.

[035] Embodiments of the present disclosure disclose an intake system and an exhaust system for an engine of a vehicle. Conventional air intake and exhaust systems include additional valve/bypass valve mechanisms along with liquid detection sensors, to detect entry of liquid into the air intake system and the exhaust system. Upon detecting the liquid in the air intake duct and the exhaust duct, the valves/bypass valve mechanisms may operate to a closed position, to prevent entry of liquid into the engine, through the air intake duct and the exhaust duct. However, conventional techniques along with preventing entry of liquid into the engine, also prevent entry of air through the intake duct and venting of exhaust gases from the engine through the exhaust duct, resulting in stalling of the engine, which us undesired.

[036] Accordingly, the present disclosure discloses an air intake system and an exhaust system for an engine of a vehicle. The air intake system and an exhaust system may be configured to prevent entry of liquid into the engine and yet operating the engine in ON condition without stalling the engine.

[037] The air intake system of the present disclosure may include a primary air intake duct and an auxiliary duct, which may be communicatively coupled to the primary air intake duct. The auxiliary duct may be configured to supply air from at least one auxiliary source into the engine. Further, the air intake system may include a float chamber, which may be disposed within the primary air intake duct. The float chamber may be configured to selectively block the primary air intake duct to prevent entry of liquid into the engine. Furthermore, the air intake system includes a vacuum sensing valve, disposed at a connection junction of the auxiliary air intake duct and the primary air intake duct. The vacuum sensing valve is configured to selectively allow flow of air from the auxiliary intake duct into a portion of the primary air intake duct, downstream to the float chamber, when the air intake of the primary air intake duct is blocked by the float chamber. In an operational embodiment, upon entry of liquid into the primary air intake duct, a ball in the float chamber may displace and occupy an end of the float chamber, thus blocking the primary air intake duct. Due to blocking of the primary air intake, vacuum may be created in a portion of the primary air intake duct, downstream to the float chamber. The vacuum created may be sensed by the vacuum sensing valve, which operates (thus, opens) to allow flow of air from the auxiliary air intake duct to the engine, to operate the engine in ON condition.

[038] The exhaust system of the present disclosure may include an exhaust duct, at least one non-return valve and at least one pressure release valve. The at least one non-return valve may be disposed within the exhaust duct and may be configured to selectively block the exhaust duct to prevent entry of liquid into the engine through the exhaust duct. Further, the at least one pressure release valve may be disposed within the exhaust duct, downstream to the at least one non-return valve. The at least one pressure release valve may be configured to vent exhaust gases from the engine, when the exhaust duct is blocked by the at least one non-return valve, to prevent entry of liquid into the engine.

[039] The following paragraphs describe the present disclosure with reference to Figures. 1 to 6. In the figures, the same element or elements which have similar functions are indicated by the same reference signs.

[040] Figure. 1 shows a schematic view of an air intake system (100) for an engine (104) of the vehicle [not shown in Figures]. The air intake system (100) may be configured to prevent entry of liquid (117) into the engine (104) through an air intake duct and, yet facilitating flow of air into the engine (104), for operating the engine (104) in the ON condition.

[041] As seen in Figure. 1, the air intake system (100) may include a primary air intake duct (101), which may be configured to allow flow of air from atmosphere into the engine (104). As an example, one end of the primary air intake duct (101) may be exposed to the atmosphere, which may be configured with an air pick-up duct (121), while the other end may be connected to an intake manifold (107) of the engine (104), such that air from the atmosphere may be supplied to the engine (104), through an air filter (116). In an embodiment, the primary air intake duct (101) may be defined with one or more holes (109) to drain liquid entered into the primary air intake duct (101) through the air pick-up duct (121). Further, the air intake system (100) may include a float chamber (105), which may be disposed within the primary air intake duct (101). The float chamber (105) may be configured to selectively block the primary air intake duct (101) to prevent entry of liquid (117) into the air filter (116) and the engine (104). In an embodiment, the float chamber (105) may include a float (108) such as but not limiting to a ball which displaces between a block condition and an unblock condition. In the unblock condition, the ball (108) may reside within a ring (not shown in Figures), configured in the float chamber (105). When there is an entry of liquid (117) [as seen in Figure. 2] into the primary air intake duct (101) from the air pick-up duct (121), and due to buoyancy characteristics, the ball (108) may displace from its initial position and may occupy one end of the float chamber (105), and thus blocking the liquid (117) from entering into the engine (104).

[042] Further, the air intake system (100) may include an auxiliary air intake duct (102). The auxiliary air intake duct (102) may be fluidly coupled to the primary air intake duct (101). In an embodiment, the auxiliary air intake may be fluidly coupled at any location with the primary air intake duct (101) downstream to the float chamber (105). As an example, the auxiliary air intake duct (102) may be fluidly coupled at any portion of the primary air intake duct (101), proximal to the intake manifold (107) of the engine (104). The auxiliary air intake duct (102) may be configured to supply flow of air into the engine (104), from at least one auxiliary source (103) such as but not limiting to a cabin of a vehicle, air conditioning (AC) unit of the vehicle and the like, when the primary air intake duct (101), is blocked, to prevent entry of liquid into the engine.

[043] In an embodiment, the air intake system (100) may include a vacuum sensing valve (106). The vacuum sensing valve (106) may be disposed at a connection junction of the auxiliary air intake duct (102) and the primary air intake duct (101). The vacuum sensing valve (106) may be configured to selectively allow flow of air from the auxiliary air intake duct (102) into a portion of the primary air intake duct (101), when the primary air intake duct (101) is blocked by the float chamber (105), due to entry of liquid (117) into the primary air intake duct (101). In other words, due to blocking of the primary air intake duct (101) by the float chamber (105), air may also be blocked from entering the engine (104) through the primary air intake duct (101), due to which vacuum may be created in a portion of the primary air intake duct (101) [i.e. in a portion of the primary air intake duct (101), downstream to the float chamber (105)]. The vacuum sensing valve (106) may detect vacuum in the portion of the primary air intake duct (101) and may allow flow of air from the auxiliary air intake duct (102) into the engine (104) [as seen in Figure. 2], in order to operate the engine (104) in ON condition.

[044] Turning now to Figure. 2, illustrates a schematic view of the air intake system (100) with the primary air intake duct (101) being blocked to prevent entry of liquid (117) into the engine (104). As seen in Figure. 2, due to entry of liquid (117) into the primary air intake duct (101), due to buoyancy characteristics the ball (108) may displace and may occupy an end of the float chamber (105). This results in blocking the primary air intake duct (101) and thus, preventing entry of liquid (117) into the engine (104). As the primary air intake duct (101) is blocked by the float chamber (105), vacuum may be created in a portion of the primary air intake duct (101), downstream to the float chamber (105). This vacuum created in the portion of the primary air intake duct (101), may be sensed by the vacuum sensing valve (106), disposed at the connection junction of the auxiliary air intake duct (102) and the primary air intake duct (101). Further, upon detecting vacuum by the vacuum sensing valve (106), the vacuum sensing valve (106) may operate (thus, open) [as seen in Figure. 2] to allow flow of air from at least one auxiliary source (103), through the auxiliary air intake duct (102) into the engine (104), and thus operating the engine (104) in ON condition. Thus, the configuration of the intake system (108) facilitates in flow of air into the engine (104), even upon blocking the air flow ducts to prevent entry of liquid (117) into the engine (104), unlike the conventional systems which stall the engine (104), while preventing entry of liquid (117) into the engine (104).

[045] Now referring to Figure. 3, which illustrates a schematic view of the exhaust system (200) for an engine (104) of the vehicle. The exhaust may include an exhaust duct (111). The exhaust duct (111) may extend from exhaust manifold (110) of the engine (104), for venting exhaust gases generated in the engine (104) to the surroundings. The exhaust duct (111) may be defined with one or more holes (114) to drain liquid entered into the exhaust duct (101). In an embodiment, at least one catalytic convertor (118) and a muffler (119) may be disposed within the exhaust duct (111) for treating the exhaust gases emitted from the engine (104) to meet the emission and noise regulatory requirements. As seen in Figure. 3, the exhaust system (200) may include at least one non-return valve (112) disposed within the exhaust duct (111). In an embodiment, the at least one non-return valve (112) may be disposed at but not limiting to an end of the exhaust chamber (120). As an example, the at least one non-return valve (112) may be but not limiting to bypass valve, check valves and the like. The at least one non-return valve (112) may be configured to selectively block the exhaust duct (111) to prevent entry of the liquid (117) into the engine (104), through the exhaust duct (111). In other words, the at least one non-return valve (112) allows venting of exhaust gases from the engine (104) and blocks the exhaust duct (111) upon entry of liquid (117) into exhaust duct (111). As apparent from Figure. 3, the exhaust system (200) may include at least one pressure release valve (113). The at least one pressure release valve (113) may be configured to vent the exhaust gases from the engine (104), when the exhaust duct (111) is blocked by the at least one non-return valve (112), in order to vent the exhaust gases, and keep the engine operating in ON condition.

[046] Now turning onto Figure. 4, which illustrates a schematic view of the exhaust system (200) for an engine (104) of a vehicle, with the exhaust duct (111) being blocked to prevent entry of liquid (117) into the engine (104). As seen in Figure. 4, upon entry of liquid (117) into the exhaust duct (111) (thus, the exhaust chamber (120)), the at least one non-return valve (112) may block the exhaust duct (111) to prevent entry of liquid (117) into the engine (104). In an embodiment, the at least one non-return valve (112) blocks the exhaust duct (111), when the pressure exerted by the liquid (117) entering the exhaust duct (111) is greater than pressure of the exhaust gases emitted by the engine (104). Due to blocking of the exhaust duct (111) by the at least one non-return valve (112), a pressure may be developed in the exhaust duct (111), downstream to the exhaust chamber (120), due to continuous emission of the exhaust gasses from the engine (104). As apparent from Figure. 4, when the pressure in the exhaust duct (111), downstream to the exhaust chamber (120) exceeds a threshold value, the at least one pressure release valve (113) may operate (thus, open) to vent out the exhaust gases from the engine (104). Thus, the configuration of the exhaust system (200) facilitates in flow of exhaust gas from the engine (104), even upon blocking the exhaust ducts to prevent entry of liquid (117) into the engine (104), unlike the conventional systems which stall the engine (104), while preventing entry of liquid (117) into the engine (104).

[047] Turning now to Figure. 5, which illustrates a schematic view of the air intake system (100) and the exhaust system (200) for the engine (104) of a vehicle [not shown in Figures]. As seen in Figure. 5, air from the atmosphere is drawn into the engine (104), through the primary air intake duct (101) via the air pick-up duct (121) float chamber (105), the air filter (116) and the intake manifold (107). Further, the exhaust gases from the engine (104) flow through the exhaust duct (111) via at least one catalytic convertor (118), the muffler (119) and through the exhaust chamber (120). In an embodiment, in normal operating conditions, and due to non-existence of buoyancy characteristics in the float chamber (105), the ball (108) resides within the float chamber (105) and, thus the air flows into the engine (104) through the primary air intake duct (101). Further, since there is no liquid entering the exhaust chamber (120) the at least one non-return valve (112) operates in open position, to vent exhaust gases from the engine (104) and thus, the exhaust gases flow through the exhaust duct (111).

[048] Referring to Figure. 6, illustrates a schematic view of the air intake system (100) and the exhaust system (200) for an engine (104) of a vehicle, with the both air intake duct and the exhaust duct (111) being blocked to prevent entry of liquid (117) into the engine (104). As apparent from Figure. 6, and as described above, due to entry of liquid (117) into the primary air intake duct (101) [thus, into the float chamber (105)], the float chamber (105) may block the primary air intake and thus, preventing entry of liquid (117) into the engine (104). Due to blockage of the primary air intake duct (101), vacuum may be created in a portion of the primary air intake duct (101), downstream to the float chamber (105), which may be sensed by the vacuum sensing valve (106), disposed at the connection junction of the auxiliary air intake duct (102) and the primary air intake duct (101). As seen in Figure. 6, upon detecting vacuum by the vacuum sensing valve (106), the vacuum sensing valve (106) may operate (thus, open) to allow flow of air from at least one auxiliary source (103), through the auxiliary air intake duct (102) and into the engine (104), resulting in operating the engine (104) in ON condition. Further, referring to Figure. 6, and as described above, upon entry of liquid (117) into the exhaust duct (111) [thus, the exhaust chamber (120)], the at least one non-return valve (112) may block the exhaust duct (111) to prevent entry of liquid (117) into the engine (104). Upon, blocking of the exhaust duct (111) by the at least one non-return valve (112), a pressure may be developed in the exhaust duct (111), downstream to the exhaust chamber (120), due to continuous emission of the exhaust gasses from the engine (104). As evident from Figure. 6, when the pressure in the exhaust duct (111), downstream to the exhaust chamber (120) exceeds a threshold value, the at least one pressure release valve (113) may operate (thus, open) to vent out the exhaust gases from the engine (104), and thus resulting in operating the engine (104) in ON condition. Thus, the configuration of the air intake system (100) and the exhaust system (200) aids in operating the engine (104) in ON condition and yet preventing entry of liquid (117) into the engine (104).

[049] In an embodiment, the auxiliary air intake duct (102) which is fluidly connected to the primary air intake duct (101) in the air intake system (100), may not be construed as a limitation, as the auxiliary air intake duct (102) may be directly connected to the intake manifold (107) of the engine (104) via an auxiliary air filter [not seen in Figures] disposed in the auxiliary air intake duct (102), without deviating from the scope of the present disclosure.

[050] In an embodiment, the air intake system (100) and the exhaust system (200) of the present disclosure may aid in preventing entry of liquid (117) into the engine (104), and yet operating the engine (104) in ON condition.

[051] In an embodiment, an end of the auxiliary air intake duct (102) may extend from an cabin or from an air conditioning unit, in order to draw air from at least one of the cabin and the air conditioning unit, when the primary air intake duct (101) is blocked to prevent entry of liquid into the engine (104).

[052] In an embodiment, the mechanical valves associated with a microprocessor or a control unit, may be disposed at a connection junction of the auxiliary air intake duct (102) and the primary air intake duct (101). The microprocessor or the control unit may operate the valve, upon blocking of the primary air intake duct (101).

[053] It is to be understood that a person of ordinary skill in the art may develop the air intake system and exhaust system of similar configuration without deviating from the scope of the present disclosure. Such modifications and variations may be made without departing from the scope of the present invention. Therefore, it is intended that the present disclosure covers such modifications and variations provided they come within the ambit of the appended claims and their equivalents.

[054] Equivalents:

[055] 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.

[056] 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 (108) 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 (108) 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.” 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.

[057] Referral Numerals:

Air intake system 100
Primary air intake duct 101
Auxiliary air intake duct 102
Auxiliary source 103
Engine 104
Float chamber 105
Vacuum sensing valve 106
Intake manifold 107
Ball 108
One or more holes in the primary air intake duct 109
Exhaust system 200
Exhaust manifold 110
Exhaust duct 111
Non-return valve 112
Pressure-release valve 113
One or more holes in the exhaust duct 114
Air filter 116
Liquid 117
Catalytic convertor 118
Muffler 119
Exhaust chamber 120
Air pick-up duct 121