DESC:FIELD OF INVENTON

This invention relates to a gaseous fuel supply system used to supply a gaseous fuel to an internal combustion engine. More particularly this invention relates to design of a gaseous fuel supply system to be used in cold atmospheric conditions.

CROSS-REFERENCE TO RELATED APPLICATION
This invention takes priority from an earlier filed Indian patent application no. 202021027919 filed on July 01, 2020; which is incorporated herein by reference in its entirety.
BACKGROUD OF THE INVENTION

In an internal combustion engine operating with a gaseous fuel supply, such as an LPG or CNG, gaseous fuel supply is preferred for environmental reasons in India and many other parts of the world. The gaseous fuel supply system comprises components like a gas storage tank, gas pressure regulator, gas control valve, gas pipe, gas filter etc. The gas pressure regulator controls/regulates the pressure and quantum of gas delivered to the engine in accordance with engine operating conditions or driver demand. When vacuum in an intake manifold of the engine is high, reflecting high engine load conditions, a higher quantum of gas is supplied to the engine. When vacuum in the intake manifold is reduced, for example at engine idle condition, the delivery of gas to the engine is least.

A typically used gas pressure regulator comprises of a regulator body which has an inlet port to receive high pressure gas from a gaseous fuel tank and an outlet port to deliver lower pressure gas to the engine. An orifice in the regulator controls flow of the gas between the inlet port and outlet port through the movement of piston in the regulator according to requirement of gas to the engine.

During running of the engine, a gas flows through the regulator from inlet port to outlet port passing through small orifice. The gas expands during the flow resulting reduction of gas pressure in the regulator. When this happens continuously and more particularly at the peak flow rate, the cooling effect is observed and temperature of gas and surrounding body of regulator is reduced significantly. When the atmospheric temperatures are low, the temperature of regulator reduced further below freezing temperature of water. The moisture content in the gas starts to freeze and ice starts forming in the gas flow passages including in the pores of filter in the regulator. This creates obstruction in gas flow passages and reduces gas flow. Further at a particular point ice is formed in the passages (this is referred as freezing in the gas regulator) that blocks the gas flow from regulator to engine causing hesitation/ stoppage of the engine running due to lack of gaseous fuel.

Various attempts were made to address this freezing problem of gas regulators. For example heating the regulator externally by electric heater, hot air blow, putting electric lamp near it etc. However, these methods are not sufficient, costly and involve many new parts and makes system complex/ unsafe.

A typical prior art gas regulator is explained with the help of figures. In this example, a gas regulator mounting position is at an angle to the vertical direction. This position is by design due to packaging constrains or driving a vehicle on inclined road. During gas flow across regulator, moisture present in the gas is converted in to water droplets due less temperature inside regulator. Gas can also have oil or oily substances (which comes during filling of gas from filling station). In the inclined position of regulator, the water droplets and the oily substances are accumulated in the cavity of piston housing of the regulator due to inclination. Further this accumulated water is converted into ice, and oil/oily substance becomes thicker due to drop in a temperature. Due to this the piston of the regulator cannot travel to its full stroke causing ice formation at corner or oil becoming thick, which reduces the flow of gas to engine resulting interrupted running of the engine. Sometimes due to stroke of piston, the ice may break and can stuck in the outlet port of regulator, which may stop the supply of gas to engine and engine may stop.

In some regions/supply stations, there are issues in gas quality. Gas contains substantial amount of oil and or moisture water. Many times, gas regulators are provided with inbuilt filter to separate dirt/dust. In cold atmospheric conditions and during freezing condition of regulator due to cooling effect, the temperature of regulator and filter reduces further. Also sometimes water/ moisture present in the filter gets freezed and may becomes ice which results in expansion of filter pores leading to filter crack situation.
Due to this, the oil and water accumulated in the filter also freezes and or become thick. Due to this a gas flow through regulator is interrupted or stopped. The engine stops running due to lack of supply of gaseous fuel.

OBJECT OF THE INVENTION
The object of the invention is to solve the above mentioned problems of the regulator.
Another object of the present invention is to design a regulator which will avoid the interruption of gas flow due to cold atmospheric conditions, presence of moisture, oil etc.
Another object of the present invention is to avoid the interruption of gas flow due to accumulation of ice, oily substance in the path of gas.

SUMMARY OF INVENTION
To avoid the problems mentioned above, the applicant developed a
a gaseous fuel supply system (10) for an internal combustion engine (70) of an automotive vehicle, wherein it comprises;
at least one gaseous cylinder (11), gas control valve (12) connected to the gaseous cylinder (11) at the gas outlet of the cylinder; wherein;
at least two gas regulators (13 & 14) are connected to a gas control valve (12) with the help of a connecting arrangement (A), and wherein;
the gas outlets of both the regulators (13 & 14) are connected ( or joined) together with the help of a connecting arrangement (B) to supply gas to the engine (70),
and the gas regulators (13 & 14) are directly mounted on the gas cylinder (11) through the gas control valve (12) or on vehicle part/s through mounting arrangement (C).

Preferably in the gaseous fuel supply system (10),
at least two gas regulators (13 & 14) are mounted on the cylinder (11) through the gas control valve (12) with the help of connecting arrangement (A) between gas control valve (12) and regulators (13 & 14).

Preferably in the gaseous fuel supply system (10),
at least two gas regulators (13 & 14) are mounted on the vehicle frame/ body or chassis (34) through a mounting bracket (17) and connected with the help of the connecting arrangement (A) between the valve and the regulator.

Preferably in the gaseous fuel supply system (10),
at least two gas regulators (13 & 14) are mounted on the engine (70) through the mounting bracket (17) and connected with the help of the connecting arrangement (A) between the control valve (12) and the regulators (13 & 14).

Preferably in the gaseous fuel supply system (10),
the two regulators (13 & 14) are arranged in parallel to each other.

Preferably in the gaseous fuel supply system (10),
at least one gas regulator (100) is mounted at tilted condition with respect to the vertical plane for compact packaging.

Preferably in the gaseous fuel supply system (10),
the connecting arrangement (A) between the control valve (12) and regulators (13 & 14) includes hoses or pipes (15).

Preferably in the gaseous fuel supply system (10),
the connecting arrangement (B) between regulators (13 & 14) and engine (70) includes a ‘Tee’ joint connector (18) and hose pipes (16).

Preferably in the gaseous fuel supply system (10),
the mounting arrangement (C) comprises brackets (17) and clamping means.

Preferably in the gaseous fuel supply system (10), more than one gaseous cylinders (21, 22) are provided and gas outlet from all cylinders (21, 22) are connected together by a connecting arrangement (A) and further distributed to both the regulators (26 & 27) through a connecting arrangement (B) to supply gas to the engine (70) through the hose pipe (16), a gas filter (29) and a low pressure regulator (30).

Preferably in the gaseous fuel supply system (10), at least one gaseous cylinder (11, 21) is located below a driver seat (31) of the vehicle (50).

Preferably in the gaseous fuel supply system (10), at least one gaseous cylinder (11, 21) is located below a passenger seat (32) of the vehicle (50).

Preferably in the gaseous fuel supply system (10), at least one gaseous cylinder (11, 21) is located at extreme rear (33) of the vehicle (50).

Preferably in the gaseous fuel supply system (10), at least one gaseous cylinder (11, 21) is located in luggage space (42) in front of dash board (43) of the vehicle (60).

Preferably in the gaseous fuel supply system (10), at least one gaseous cylinder (11, 21) is located below load carrying tray of the vehicle.

Preferably, in the gaseous fuel supply system (10), at least one gaseous cylinder (11, 21) is located under passenger body, around engine compartment.

Preferably in the gaseous fuel supply system (10),
a. the first regulator (26) is mounted on the first cylinder (21) through a first control valve (23),
b. the second regulator (27) is mounted on second cylinder (22) through a second control valve (24),
c. gas outlet from both the cylinders (21 & 22) through respective the control valves (23 & 24) are connected to inlet ports of the respective regulators (26 & 27) by steel pipes (15),
d. Outlet ports of both the regulators (26 & 27) are connected to two inlet ports of ‘Tee’ connector (28) by the hose pipe (16),
e. Outlet port of ‘Tee’ connector (28) is connected to engine (70) intake by the hose pipe (16).

Preferably in the gaseous fuel supply system (10),
a. the first regulator (26) is mounted on vehicle body with the bracket (17) and clamping means,
b. the second regulator (27) is mounted on vehicle body with the bracket (17) and clamping means,
c. gas outlet from both the cylinders (21 & 22) through the respective control valves (23 & 24) are connected to the respective regulators (26 & 27) by steel pipes (25),
d. Outlet ports of both the regulators (26 & 27) are connected to two inlet ports of ‘Tee’ connector (28) by the hose pipe (16),
e. Outlet port of ‘Tee’ connector (28) is connected to engine (70) intake by a rubber hose (16).

As per another embodiment of the present invention, a gaseous fuel supply system (10) for an internal combustion engine of an automotive vehicle, wherein the system comprises;
a gas regulator (200), a regulator body (201), inlet port (202), outlet port (203), flow controlling piston (204) and piston housing (205);
wherein, a hollow cavity (208) is provided to one end of the piston housing (209) of the gas regulator (100).

Preferably in the gas regulator (200), the cavity (208) is of conical shape.

Preferably in the gas regulator (200), a taper angle (ß) of the conical cavity (208) with respect to flat top portion (210) of the piston (204) of the regulator (200) is equal to or greater than the tilting angle (a) of gas regulator (200) mounting on vehicle with respect to vertical plane (V).

Preferably in the gas regulator (200), a taper angle (ß) of the conical cavity (208) with respect to flat top portion (210) of the piston (204) of the regulator (200) is equal to or greater than 15 degrees.

Preferably in the gaseous fuel supply system wherein; a gas regulator (200) is retro-fitted on the vehicle.

As per another embodiment of the present invention, a gaseous fuel supply system (400) for an internal combustion engine of an automotive vehicle, wherein the fuel supply system (400) comprises;
at least one gaseous cylinder (411),
gas control valve/s (412, 423, 424) connected to the gaseous cylinder/s (411, 421, 422) at the gas outlet of the respective cylinder,
a gas filter (402), a gas regulator (401), gas connection pipes (404),
wherein, inlet port of gas filter (402) is connected to the gas cylinder (411) through gas control valve (412) and /or connection pipe (404) and outlet port of the gas filter (402) is connected to the gas regulator (401) through the connection pipe (404).
and wherein; the gas filter (402) is located between the gas control valve (412) and the gas regulator (401) and distal away from the gas regulator (401).

Preferably in the gaseous fuel supply system (400), the gas filter (402) is mounted on the gas cylinder (411) through the gas control valve.

Preferably in the gaseous fuel supply system (400), the gas filter (402) is mounted on the vehicle body through bracket (407) and fastening means.

Preferably in the gaseous fuel supply system (400), the gas filter (402) is mounted on the engine through bracket and fastening means.

BRIEF DESCRIPTION OF DRAWINGS:

Figure 1 is a pictorial view of a gaseous fuel supply system according to one embodiment of the present invention.
Figure 2 is a pictorial view of a gaseous fuel supply system according to another embodiment of the present invention.
Figure 3 and 4 are close up views of details of gaseous fuel supply system according to another embodiment of the present invention.
Figure 5, 6, 7, 8, 9, 10 are pictorial views of showing the location of gas cylinders according to various embodiments of the present invention.
Figure 11 and 12 are pictorial views of a gas regulator according to one of the prior art of the present invention.
Figure 13 and 14 are pictorial views of a gas regulator according to one embodiment of the present invention.
Figure 15 and 16 are pictorial views of a gaseous fuel supply system according to another embodiment of the present invention.
Figure 17 is pictorial view of a gaseous fuel supply system according to another embodiment of the present invention where only one gas cylinder is provided.
Figure 18 is pictorial view of a gaseous fuel supply system according to another embodiment of the present invention where two gas cylinders are provided.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT:

Embodiments of present invention will now be explained with the help of figures herein below. All the aspects described herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating preferred embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope herein without departing from the spirit and scope thereof, and the present invention herein includes all such modifications.

Referring to Figure 1, a gaseous fuel supply system (10) for an internal combustion engine (70) of an automotive vehicle comprises gaseous cylinder (11), a gas control valve (12) connected to the gaseous cylinder at the gas outlet of the cylinder (11), two gas regulators (13 & 14) are connected to a gas control valve (12) with the help of connecting arrangement (A). The gas outlets of both the regulators (13 & 14) are join together with the help of connecting arrangement (B) to supply gas to the engine (70) through filter (29) and low pressure gas regulator (30). The gas regulators (13 & 14) are mounted on gas cylinder (11) through control valve (12) or on vehicle chassis (34) or on engine (70) through mounting arrangement (C). The connecting arrangement (A) may be a direct connection between control valve (12) and regulators (13 & 14) or it may be a high pressure hose (15) (for example steel pipe). Connecting arrangement (B) comprise ‘Tee’ joint (28) and low pressure hose (16) (for example rubber hose). Mounting arrangement (C) comprise a bracket (17) connected to chassis of vehicle or engine hanger and standard nut bolts (not shown). The gas regulator (13 &14) may be high pressure regulators. Gas flow from gas cylinder (11) to engine (70) is shown by arrows (20). Gas flows from cylinder (11) through control valve (12) to two regulators (13 & 14). Gas flowing out from both regulators (13 &14) is merge together at ‘Tee’ joint (18) and flows to engine (70) through low pressure hose (16), filter (29) and low pressure regulator (30). In this system the regulators (13 & 14) are arranged parallel to each other. Gas flows simultaneously through both regulators (13 & 14) or may flows through only one regulator (13 or 14). When a vehicle is running in cold atmospheric conditions, a gas flow through one regulator (say 13) is reduced or stopped due to freezing effect, the gas flow through another regulator (14) will continue and there will be no effect on normal running of engine and vehicle.

The invention as illustrated above is also useful when the flow of gas through one regulator is stopped due to any reason (for example blockage of gas path by contaminants). At that time the flow of gas will be continued from 2nd regulator. Hence engine/ vehicle will not stop working.

Now referring to figure 2, as per another embodiment of the present invention, two gas cylinders (21 & 22) are provided. These two gas cylinders (21 & 22) are connected to each other through respective control valves (23 & 24) and a high pressure hose (25) (for example steel pipe). Two gas pressure regulators (26 & 27) are connected to gas control valves (23 & 24) respectively with the help of high pressure hose (25). The gas outlets of both the regulators (26 & 27) are join together with the help of connecting arrangement (B) to supply gas to the engine (70) through filter (29) and low pressure gas regulator (30). The gas regulators (26 & 27) are mounted on vehicle chassis or on engine (70) through mounting arrangement (C). Gas flows from cylinders (21 & 22) through respective control valves (23 & 24) to two regulators (26 & 27). Gas flowing out from both regulators (26 &27) is merge together at ‘Tee’ joint (28) and flows to engine (70) through low pressure hose (16), filter (29) and low pressure regulator (30).

There are various locations in the vehicle where the gas cylinder are mounted. Figure 5 discloses two cylinders (21 & 22) are mounted below a driver seat (31) of a three wheeled vehicle (50). Figure 6 discloses only one cylinder (11) is mounted below a driver seat (31) of a three wheeled vehicle (50). Figure 7 discloses cylinder (11) is mounted below a passenger seat (32) of a three wheeled vehicle (50). Figure 8 discloses cylinder (11) is mounted at rear end (33) of a three wheeled vehicle (50). Figure 9 discloses cylinder (11) is mounted below driver seat (41) of a four wheeled vehicle (60). Figure 10 discloses cylinder (11) is mounted at luggage space (42) in front od dash board (43) of a four wheeled vehicle (60).

Now referring to figures 11 and 12, according to known prior art, a regulator (100) comprises a regulator body (101), inlet port (102), outlet port (103), flow controlling piston (104) and piston housing (105). The gas regulator (100) is mounted at tilted condition at an angle (a) with respect to the vertical plane for compact packaging. This position is by design due to packaging constrains or driving a vehicle on inclined road. When a vehicle is running in cold atmospheric conditions, during gas flow across regulator (100), moisture present in the gas is converted in to water droplets due less temperature inside regulator (100). Gas can also have oil or oily substances. In the inclined position of regulator (100), the water droplets and the oily substances are accumulated in the cavity (108) of piston housing (105) of the regulator (100) at corner (106) due to the inclination. Further this accumulated water is converted into ice due to freezing temperature of the regulator (100). The piston (104) could not travel to its full stroke due to this ice is formed (107) at corner (106) of piston cavity, which reduces the flow of gas to engine resulting interrupted running of the engine. Sometimes due to stroke of piston, the ice formed (107) at corner (106) may brake and can stuck in the outlet port (103) of the regulator (100), which may stop the supply of gas to engine and engine may stop.

This problem is solved by a design of regulator (200) as per another embodiment of the present invention. Referring to figures 13 and 14, a regulator (200) comprises a regulator body (201), inlet port (202), outlet port (203), flow controlling piston (204) and piston housing (205). The gas regulator (200) is mounted at tilted condition at an angle (a) with respect to the vertical plane for compact packaging. A conical cavity (208) is provided at one end (209) of the piston housing (205) below the piston (204). Due to this conical cavity (208), the water will not accumulate at the corner (110) of the piston housing (205). Any water droplets, made from moisture due to low temperature, will flow to outlet port (203) through the conical cavity (208) due to gravity. Hence the problem of ice formation in the regulator will be avoided. A taper angle (a) of conical cavity with respect to flat top portion (210) of the piston (204) of the regulator (200) is equal to or greater than the tilting angle (ß) of gas regulator (200) mounting on vehicle with respect to vertical plane (V). . A taper angle (a) of conical cavity (208) may be 15 degrees or more. The said regulator (200) may be retro-fitted on the vehicle to solve the above mentioned problem.

Now referring to figure 12, 15, 16, according to known prior art, a regulator (100) comprises a gas filter (110). In some regions/supply stations, there are issues in gas quality. Gas contains substantial amount of oil and or moisture water. Many times, gas regulators (100) are provided with inbuilt filter (110) to separate dirt/dust. In cold atmospheric conditions and during freezing condition of regulator (100) due to cooling effect, the temperature of regulator (100) and filter (110) reduces further. Due to this, the oil and water accumulated in the filter (110) also freezes and or become thick. Due to this a gas flow through regulator (100) is interrupted or stopped. The engine (70) stops running due to lack of gaseous fuel.

This problem is solved by a designing a gaseous fuel supply system (400) as per another embodiment of the present invention. Referring to figures 15 and 16, a gaseous fuel supply system (400) comprises one cylinder (411) or two cylinders (421 & 422) gas control valve/s (412, 423, 424) connected to the gaseous cylinder/s (411, 421, 422) at the gas outlet of the respective cylinder, a gas filter (402), a gas regulator (401), gas connection pipes (404). In this arrangement, the gas filter (402) is located between the gas control valve (412, 423, 424) and the gas regulator (401) and distal away from the gas regulator (401). Inlet port (405) of gas filter (402) is connected to the gas cylinder (411, 421, 422) through gas control valve (412, 423, 424) and /or connection pipe (404) and outlet port (406) of the gas filter (402) is connected to the gas regulator (401) through the connection pipe (404). As the gas filter (402) is located away from gas regulator (401), its temperature does not drop due to cooling of regulator (401).The moisture does not freeze. Due to this the gas flow through regulator (401) is not interrupted or stopped. Hence no effect on normal running of engine and vehicle. Further the gas filter (402) may be mounted on gas cylinder (411) through the gas control valve (412). The gas filter (402) may also be mounted on the vehicle body through bracket (407) and fastening means. The gas filter may mounted on the engine through bracket and fastening means.
With above embodiments of the invention the problem mentioned earlier in the gaseous fuel supply system can be solved effectively.

Now another embodiment of the present invention is descried with the help of figure 17 where only one gas cylinder is used. A gaseous fuel supply system (10) for an internal combustion engine (70) of an automotive vehicle comprises gaseous cylinder (11), a gas control valve (12) connected to the gaseous cylinder (11) at the gas outlet of the cylinder (11), two gas regulators (13 & 14) are directly connected and mounted to a gas control valve (12). The gas cylinder (11) is mounted on vehicle chassis (34) and located at rear end (33) of the vehicle (50) as shown in figure 8 & 15.The gas outlets of both the regulators (13 & 14) are join together with the help of ‘Tee’ joint (18) to supply gas to the engine (70) through filter (29) and low pressure gas regulator (30) through low pressure hose (16). Gas flow from gas cylinder (11) to engine (70) is shown by arrows (20). Gas flows from cylinder (11) through control valve (12) to two regulators (13 & 14). Gas flowing out from both regulators (13 &14) is merge together at ‘Tee’ joint (18) and flows to engine (70) through low pressure hose (16), filter (29) and low pressure regulator (30). The filter (29) and low pressure regulator (30) are mounted on vehicle chassis (34) with the help of stand nut and bolts.

Another embodiment of the present invention is descried with the help of figure 18 where two gas cylinder are used. As per this embodiment of the present invention, two gas cylinders (21 & 22) are provided. These two gas cylinders (21 & 22) are mounted on vehicle chassis (34) through bracket (407) and located below the driver seat (31) of the vehicle (50) as shown in figure 5 and 16. These two gas cylinders (21 & 22) are connected to each other through respective control valves (23 & 24) and a high pressure hose (25) (for example steel pipe). Two gas pressure regulators (26 & 27) are connected to gas control valves (23 & 24) through high pressure hose (25). Two gas pressure regulators (26 & 27) are mounted on vehicle chassis (34) through bracket (17) The gas outlets of both the regulators (26 & 27) are join together with the help of ‘Tee’ joint (28) to supply gas to the engine (70) through filter (29) and low pressure gas regulator (30).

The gaseous fuel supply system as described above with figures 17 and 18 can be implemented for other embodiments of gas cylinder mounting locations shown in figures 6, 7, 9 and 10.

Although the invention has been described with regard to its embodiments, specific embodiments, and various examples, which constitute the best mode presently known to the inventors, it should be understood that various changes and modifications as would be obvious to one having the ordinary skill in this art may be made without departing from the scope of the invention. The scope of the claims should not be limited by the preferred embodiments set forth in the examples, but should be given the broadest interpretation consistent with the description as a whole. All changes that come with meaning and range of equivalency of the claims are to be embraced within their scope.
,CLAIMS:CLAIMS
We Claim:

1: A gaseous fuel supply system (10) for an internal combustion engine (70) of an automotive vehicle (50), wherein the system comprises:
at least one gaseous cylinder (11), gas control valve (12) connected to the gaseous cylinder (11) at the gas outlet of the cylinder (11) wherein;
at least two gas regulators (13 & 14) are connected to the gas control valve (12) by a connecting arrangement (A), and wherein;
the gas outlets of both the regulators (13 & 14) are connected together with the help of a connecting arrangement (B) to supply gas to the engine (70) and the gas regulators (13 & 14) are directly mounted on the gas cylinder (11) through the gas control valve (12) or on vehicle part/s through a mounting arrangement (C).

2: The gaseous fuel supply system (10) as claimed in claim 1 wherein, the at least two gas regulators (13 & 14) are mounted on the gaseous cylinder (11) through the gas control valve (12) by a connecting arrangement (A) between gas control valve (12) and regulators (13 & 14).

3: The gaseous fuel supply system (10) as claimed in claim1, wherein at least the two gas regulators (13 & 14) are mounted on the vehicle frame/ body or chassis (34) through a mounting bracket (17) and connected with the help of the connecting arrangement (A) between the valve (12) and the regulator (13,14).

4: The gaseous fuel supply system (10) as claimed in claim1, wherein the at least two gas regulators (13 & 14) are mounted on the engine (70) through the mounting bracket (17) and connected with the help of the connecting arrangement (A) between the control valve (12) and the regulators (13 & 14).

5: The gaseous fuel supply system (10) as claimed in claim 1 to 4, wherein flow of gas through the two regulators (13 & 14) are parallel to each other.

6: The gaseous fuel supply system (10) as claimed claim 5, wherein at least one gas regulator (100) is mounted at tilted condition with respect to the vertical plane for compact packaging.

7: The gaseous fuel supply system (10) as claimed in claim 1 to 4, wherein the connecting arrangement (A) between the control valve (12) and the regulators (13 & 14) includes a hose pipe (15).

8: The gaseous fuel supply system (10) as claimed in claim 1 to 4, wherein the connecting arrangement (B) between the regulators (13 & 14) and the engine (70) includes a ‘Tee’ joint connector (18) and a hose pipe (16).

9: The gaseous fuel supply system (10) as claimed in claims 1 to 4, wherein the mounting arrangement (C) comprises brackets (17) and clamping means.

10:The gaseous fuel supply system (10) as claimed in claim 1 to 9, wherein more than one gaseous cylinders (21, 22) are provided and gas outlet from all cylinders (21, 22) are connected together by a connecting arrangement (A) and further distributed to both the regulators (26 & 27) through a connecting arrangement (B) to supply gas to the engine (70) through the hose pipe (16), a gas filter (29) and a low pressure regulator (30).

11: The gaseous fuel supply system (10) as claimed in claim 1 to 10, wherein; at least one gaseous cylinder (11, 21) is located below a driver seat (31) of the vehicle (50).

12: The gaseous fuel supply system (10) as claimed in claim 1 to 10, wherein the at least one gaseous cylinder (11, 21) is located below a passenger seat (32) of the vehicle (50).

13: The gaseous fuel supply system (10) as claimed in claim 1 to 10, wherein the at least one gaseous cylinder (11, 21) is located at extreme rear (33) of the vehicle (50).

14: The gaseous fuel supply system (10) as claimed in claim 1 to 10, wherein at least one gaseous cylinder (11, 21) is located in luggage space (42) in front of dashboard (43) of the vehicle (60).

15: The gaseous fuel supply system (10) as claimed in claim 1 to 10, wherein at least one gaseous cylinder (11, 21) is located below load carrying tray of the vehicle.

16: The gaseous fuel supply system (10) as claimed in claim 10, wherein
a. the first regulator (26) is mounted on the first cylinder (21) through a first control valve (23),
b. the second regulator (27) is mounted on the second cylinder (22) through a second control valve (24),
c. gas outlet from both the cylinders (21 & 22) through respective the control valves (23 & 24) are connected to inlet ports of the respective regulators (26 & 27) by steel pipes (15),
d. Outlet ports of both the regulators (26 & 27) are connected to two inlet ports of ‘Tee’ connector (28) by the hose pipe (16);
e. Outlet port of ‘Tee’ connector (28) is connected to engine intake by the hose pipe (16).

17: The gaseous fuel supply system (10) as claimed in claim 10, wherein
a. the first regulator (26) is mounted on vehicle body with the bracket (17) and clamping means,
b. the second regulator (27) is mounted on vehicle body with the bracket (17) and clamping means,
c. gas outlet from both the cylinders (21 & 22) through the respective control valves (23 & 24) are connected to the respective regulators (26 & 27) by steel pipes (25);
d. Outlet ports of both the regulators (26 & 27) are connected to two inlet ports of the ‘Tee’ connector (28) by the hose pipe (16);
e. Outlet port of the ‘Tee’ connector (28) is connected to engine intake by the hose pipe (16).

18: A gaseous fuel supply system (10) for an internal combustion engine of an automotive vehicle, wherein the system comprises;
a gas regulator (200), a regulator body (201), inlet port (202), outlet port (203), flow controlling piston (204) and piston housing (205);
wherein, a hollow cavity (208) is provided to one end of the piston housing (209) of the gas regulator (100).

19: The gas regulator (200) as claimed in claim 18, wherein the cavity (208) is of conical shape.

20: The gas regulator (200) as claimed in claim 19, wherein a taper angle (ß) of the cavity (208) with respect to flat top portion (210) of the piston (204) of the regulator (200) is equal to or greater than the tilting angle (a) of gas regulator (200) mounting on vehicle with respect to vertical plane (V).

21: The gas regulator (200) as claimed in claim 20, wherein a taper angle (ß) of the cavity (208) with respect to flat top portion (210) of the piston (204) of the regulator (200) is equal to or greater than 15 degrees.

22: The gaseous fuel supply system as claimed in claim 18 to 21, wherein a gas regulator (200) is retrofitted on the vehicle.

23: A gaseous fuel supply system (400) for an internal combustion engine of an automotive vehicle, wherein the fuel supply system (400) comprises;
at least one gaseous cylinder (411),
gas control valve/s (412, 423, 424) connected to the gaseous cylinder/s (411, 421, 422) at the gas outlet of the respective cylinder,
a gas filter (402), a gas regulator (401), gas connection pipes (404),
wherein, inlet port of gas filter (402) is connected to the gas cylinder (411) through gas control valve (412) and /or connection pipe (404) and outlet port of the gas filter (402) is connected to the gas regulator (401) through the connection pipe (404).
and wherein; the gas filter (402) is located between the gas control valve (412) and the gas regulator (401) and distal away from the gas regulator (401).

24: The gaseous fuel supply system (400) as claimed in claim 23, wherein the gas filter (402) is mounted on the gas cylinder (411) through the gas control valve.

25: The gaseous fuel supply system (400) as claimed in claim 23, wherein the gas filter (402) is mounted on the vehicle body through bracket (407) and fastening means.

26: The gaseous fuel supply system (400), as claimed in claim 23, wherein the gas filter (402) is mounted on the engine through bracket and fastening means.