[001] The present subject matter described herein, relates to a wrong fueling of the vehicle, for example, Diesel vehicle filled with gasoline, and in particularly, wrong fueling prevention device for a fuel filler neck of an automotive fuel tank.
BACKGROUND AND PRIOR ART:
[002] Motor vehicles equipped with internal combustion engines can broadly be classified into two categories based on the fuel used for the combustion and power generation process: Gasoline fuel vehicle (Gasoline vehicle), and Diesel fuel vehicle (Diesel vehicle). The fuel is stored in fuel tank (also known as fuel storage system) which provides the fuel to engine, necessary for vehicle motion. Fuel refilling mechanism (also called fuel filling system) is connected at the end of the tank which can be used to refuel the tank whenever requires. Fuel filing system mainly consists of fuel filler neck which supports the incoming fuel dispensing nozzle to discharge the fuel into the tank.
[003] A diameter of fuel dispensing nozzle varies for gasoline and diesel fuel with diesel fuel nozzle mainly having larger diameter than the gasoline fuel nozzle.
[004] Filler neck consists of a child part, called restrictor which is having a diameter equivalent to the correct nozzle diameter, i.e., for gasoline vehicle, restrictor will allow the gasoline dispensing nozzle, but diesel nozzle being larger in diameter will be block by the restrictor. Similarly the restrictor for diesel vehicle has larger diameter than that of gasoline vehicle (diesel nozzle being larger in diameter). For example, a diameter of the gasoline dispensing nozzle is about 19 to 21 mm and that of diesel dispensing nozzle is 25 to 31 mm. Therefore, diameter of restrictor for gasoline vehicle is approximately 22 mm, and for diesel vehicle is approximately 26 to 32 mm.
[005] The wrong fueling does not occur in the gasoline vehicle as diesel nozzle is blocked due to larger diameter, but in case of diesel vehicle, this problem

occurs frequently because gasoline nozzle being smaller in diameter can be inserted in diesel fuel neck without any blockage caused by the neck restrictor.
[006] Most of the solutions involve use of electrical elements like sensors and magnetic ring method. Few solutions have used the use of opening of barrier system for filling. Tube system placed axially apart is also one of the solutions. However, use of sensors for sensing the wrong insertion and sending data to dashboard is relatively expensive and critical method.
[007] Therefore, there is need in the art to develop a device which can prevent accidental insertion of wrong fuel nozzle, i.e., gasoline fuel nozzle in diesel vehicle. If gasoline nozzle is inserted, the device should block the complete insertion of the gasoline nozzle thus preventing the miss fueling. The present subject provides a device for preventing wrong fueling in the vehicle.
OBJECTS OF THE INVENTION:
[008] The principal objective of the present invention is to prevent wrong fueling in vehicle.
[009] Another object of the present subject matter is to provide a device or wrong fueling inhibitor device to prevent insertion of wrong fuel nozzle based on diameter.
[0010] Yet another object of the present invention is to provide a device which can be positioned on the fuel filler neck for preventing insertion of wrong fuel nozzle in the fuel tank of the vehicle.
SUMMARY OF THE INVENTION:
[0011] The subject matter disclosed herein relates to a device for preventing wrong fueling in fuel tank of vehicle based on nozzle diameter. The device is positioned on fuel filler neck. The wrong fueling prevention device or inhibitor for a fuel filler neck of automotive fuel tank consist of three staged system for preventing the complete insertion of wrong fuel dispensing nozzle into the fuel filler neck of the vehicle (i.e., insertion of gasoline fuel nozzle in diesel vehicle) due to difference in fuel nozzle diameter for gasoline and diesel. The first stage

acts as a guide to the dispensing nozzle which orients the nozzle position into the system. Stage 2 and stage 3 are interconnected wherein the stage 2 consists of two spring loaded axial shafts (radially spaced apart) with hemispherical shape at one end and another end connected to each flap of stage 3 respectively by lever action for motion transfer. When the correct diameter fuel dispensing nozzle is inserted, it moves along the device through stage 1 and comes in contact with both shafts of stage 2. While moving downwards (along the filler neck), nozzle pushes the spring loaded shafts axially outward which transfers the motion to the connected flaps. The outward motion of shafts is converted in axially opening of flaps allowing the nozzle to pass through, which marks the complete insertion of nozzle.
[0012] In case of wrong nozzle insertion (gasoline nozzle in diesel vehicle), due to smaller diameter than the diesel nozzle, it passes through the stage 1. The smaller diameter gasoline nozzle does not come in contact with both axial shafts and therefore, while moving along the neck, both the shafts do not push outward and the flaps will not be completely open at stage 3 hence, the present device offers an obstruction to the nozzle, thus preventing the insertion of wrong nozzle
[0013] In order to further understand the characteristics and technical contents of the present subject matter, a description relating thereto will be made with reference to the accompanying drawings. However, the drawings are illustrative only but not used to limit scope of the present subject matter.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods in accordance with

embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0015] Fig. 1 illustrates front view of wrong fuel nozzle inhibitor, in accordance with an embodiment of the present subject matter;
[0016] Fig. 2 illustrates cross section view of the wrong fuel nozzle inhibitor of figure 1;
[0017] Fig. 3 illustrates cross section view of the wrong fuel nozzle inhibitor of figure 1 along with correct nozzle, in accordance with an embodiment of the present subject matter;
[0018] Fig. 4a, 4b, 4c and 4d illustrate three stages of the wrong fuel nozzle inhibitor to allow complete insertion of correct fuel nozzle in fuel tank of the vehicle, in accordance with an embodiment of the present subject matter; and
[0019] Fig. 5a, 5b, 5c, 5d, 5e, and 5f illustrate three stages of the wrong fuel nozzle inhibitor to restrict complete insertion of in-correct fuel nozzle in fuel tank of the vehicle, in accordance with an embodiment of the present subject matter.
[0020] The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily 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.
DESCRIPTION OF THE PREFERRED EMBODIMENTS:
[0021] The subject matter disclosed herein relates to a device for preventing wrong fueling in fuel tank of vehicle based on nozzle diameter. The device is positioned on fuel filler neck. The wrong fuel nozzle inhibitor or device comprises a cylindrical housing having a vertical cavity along vertical axis (Y-Y') and a horizontal cavity substantially in middle of the cylindrical housing along horizontal axis (X-X') which is perpendicular to vertical axis (Y-Y'). The vertical cavity defines a first aperture at upper end to receive the fuel nozzle and a second aperture at lower end along the vertical axis (Y-Y') which allows passage of the

fuel nozzle in the fuel tank. The vertical axis (Y-Y') and the horizontal axis (X-X') intersect with each other at middle point (O) of intersection of the vertical cavity and the horizontal cavity. Further, the device has two spring loaded cylindrical shafts positioned in the horizontal cavity. Each spring loaded cylindrical shaft from the two spring loaded cylindrical shafts defines a hemispherical ends and planar ends. The hemispherical ends configured to be received in the horizontal cavity such that the hemispherical ends face each other at the middle point (O) which is adjacent to the vertical axis (Y-Y'). Further, the device has two flaps with arcuate profile and pivoted with the cylindrical housing at one end. Each flap from the two flaps defining plane edge coupled to the planar end of the two spring loaded cylindrical shafts and an arcuate edge. The arcuate edges of the two flaps are adjacent to the vertical axis (Y-Y') and face each other and has a distance d' between the faces. The device works into three stages from insertion into first aperture and exit from the arcuate edges of the two flaps. Upon insertion of fuel nozzle in the vertical cavity along the vertical axis (Y-y'), the fuel nozzle pushes both the hemispherical ends of the two spring loaded cylindrical shafts in axially backward direction to exert outward force on the coupled two flaps to move the arcuate edges in outward direction to allow complete insertion of the fuel nozzle in fuel tank.
[0022] It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present subject matter. It should also be appreciated by those skilled in the art that by devising various arrangements that, although not explicitly described or shown herein, embody the principles of the present subject matter and are included within its spirit and scope. Furthermore, all examples recited herein are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the concepts contributed by the inventor(s) to furthering the art, and are to be construed as being without limitation to such specifically recited examples and

conditions. The novel features which are believed to be characteristic of the present subject matter, 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.
[0023] These and other advantages of the present subject matter would be described in greater detail with reference to the following figures. It should be noted that the description merely illustrates the principles of the present subject matter. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described herein, embody the principles of the present subject matter and are included within its scope.
[0024] Fig. 1 illustrates front view of wrong fuel nozzle inhibitor, in accordance with an embodiment of the present subject matter. Fig. 2 illustrates cross section view of the wrong fuel nozzle inhibitor of figure 1, in accordance with an embodiment of the present subject matter. The wrong fuel nozzle inhibitor or device 100 consist a cylindrical housing 101 having a vertical cavity 102 along vertical axis (Y-Y') and a horizontal cavity 103 substantially in middle of the cylindrical housing 101 along horizontal axis (X-X') perpendicular to vertical axis (Y-Y'). The vertical cavity 102 defines a first aperture 102a at upper end to receive fuel nozzle 106 (as shown in the figure 3) and a second aperture 102b at lower end along the vertical axis (Y-Y') to allow passage of the fuel nozzle 106 into the fuel tank. The vertical axis (Y-Y') and the horizontal axis (X-X') intersect with each other at middle point (O) of intersection of the vertical cavity 102 and the horizontal cavity 103.
[0025] Further, the wrong fuel nozzle inhibitor 100 has two spring loaded cylindrical shafts 104 positioned in the horizontal cavity 103 along the horizontal axis X-X'. Each spring loaded cylindrical shaft 104 from the two spring loaded cylindrical shafts 104 has a hemispherical ends 104a, 104b and planar ends 104aa, 104bb. The hemispherical ends 104a, 104b are configured to be received in the horizontal cavity 103 such that the hemispherical ends 104a, 104b face each other

at the middle point (O). The hemispherical ends 104a, 104b are adjacent to the vertical axis (Y-Y’) and face each other. The hemispherical ends 104a, 104b are provided for smooth insertion of the fuel nozzle 106 and spring are provided for backward movement of the cylindrical shaft allowing insertion of the fuel nozzle 5 106.
[0026] Furthermore, the wrong fuel nozzle inhibitor 100 has two flaps 105 with arcuate profile pivoted with the cylindrical housing 101 at one end 105a. The flaps 105 moves along the pivoted points. Each flap 105 from the two flaps 105 defining a plane edge 105b coupled to the planar end 104aa, 104bb of the two
10 spring loaded cylindrical shafts 104 near the pivoted pointed (detailed is explain in the figure 4d) and arcuate edge 105c which is in horizontal direction X-X’. The arcuate edges 105c of the two flaps 105 are adjacent to the vertical axis Y-Y’ and face each other. The two flaps 105 opens in outward direction to allow passage of the fuel nozzle 106 into the fuel tank. Upon insertion of fuel nozzle 106 in the
15 vertical cavity 102 along the vertical axis (Y-Y’), the fuel nozzle 106 pushes both the hemispherical ends 104a, 104b of the two spring loaded cylindrical shafts 104 in axially backward direction to exert outward force on the coupled two flaps 105 to move the arcuate edges 105c in outward direction to allow complete insertion of the fuel nozzle 106 in fuel tank. Figure 3 illustrates positioning of the fuel
20 nozzle with the wrong fuel nozzle inhibitor 100. The wrong fuel nozzle inhibitor 100 is positioned in the fuel filler neck to prevent and support incoming fuel dispensing nozzle to discharge the fuel into the fuel tank.
[0027] The present wrong fuel nozzle inhibitor 100 works in three stages, i.e., stage 1, stage 2, and stage 3.Referring to figure 2, D is the Diameter of opening at 25 the aperture 102a at the stage 1 which acts as a guide for the incoming fuel nozzle. For diesel vehicle, diameter is fixed on the basis of diesel dispensing nozzle diameter which varies from 25 mm to 31 mm. Therefore to ensure the smooth insertion of nozzle, D mainly lies in the range of 32mm to 40mm.
[0028] Referring to figure 2, d is the initial distance between the hemispherical 30 ends 104a, 104b of the spring loaded shafts 104 which is less than the diesel
8

dispensing nozzle diameter Do but greater than gasoline dispensing nozzle diameter. As shown in the figure 2, the distance d’ is the initial distance between the arcuate edges 105c of the two flaps 105 at stage 3 which is less than the gasoline dispensing nozzle diameter. Distance d’ is less than the distance d 5 between the hemispherical ends 104a, 104b.
[0029] The wrong fuel nozzle inhibitor 100 has three stages to prevent the insertion of wrong nozzle as explained in the figure 4a, 4b, 4c, and 4d
[0030] Case 1: When correct nozzle is inserted i.e. diesel dispensing nozzle of diameter Do
10 [0031] Stage 1: Referring to figure 4a and 4b, D is equal to Do (considering tolerances), therefore diesel nozzle passes through the stage 1. While moving along the device 100, tapered path from stage 1 to stage 2 guides the nozzle and orient its dimension.
[0032] At stage 2: Referring to figure 4b, since dD1. Hence the gasoline dispensing nozzle will be blocked by the flaps 105 at the stage 3 and it will not pass through the wrong fuel nozzle inhibitor 100.
[0059] Therefore, when the gasoline dispensing nozzle 107 is inserted in diesel vehicle, it will not pass through the stage 3 which in turn block the complete 25 insertion of the fuel dispensing nozzle 107 up to the desired length as shown in the figure 5f. This partial insertion allows the customer to recognize the wrong fueling nozzle insertion and the nozzle can be taken out before dispensing the fuel.
11

[0060] ADVANTAGES:
[0061] The wrong fuel nozzle inhibitor 100 or device 100 acts as a guide to incoming fuel dispensing nozzle for the orientation purpose.
[0062] The device 100 contains no electrical component thus making it more reliable during operation.
[0063] The spring loaded shafts 104 not only act as a passage, but also exert the force on nozzle for the better handling and filling operation.
[0064] The flappers 105 are connected to spring loaded shaft 104, whose motion is utilized with the help of lever action, thus leverage can be varied as per the OEM's design.
[0065] Although embodiments for the present subject matter have been described in language specific to structural features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/component of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the scope of the present subject matter.

We claim:
A wrong fuel nozzle inhibitor (100) for preventing wrong fueling by nozzle diameter, wrong fuel nozzle inhibitor (100) comprising:
a cylindrical housing (101) having a vertical cavity (102) along vertical axis (Y-Y') and a horizontal cavity (103) substantially in middle of the cylindrical housing (101) along horizontal axis (X-X') perpendicular to vertical axis (Y-Y'), the vertical cavity (102) defines a first aperture (102a) at upper end and a second aperture (102b) at lower end along the vertical axis (Y-Y'), the vertical axis (Y-Y') and the horizontal axis (X-X') intersect with each other at middle point (O) of intersection of the vertical cavity (102) and the horizontal cavity (103);
two spring loaded cylindrical shafts (104) positioned in the horizontal cavity (103), wherein each spring loaded cylindrical shaft (104) from the two spring loaded cylindrical shafts (104) defines a hemispherical ends (104a, 104b) and planar ends (104aa, 104bb), wherein the hemispherical ends (104a, 104b) configured to be received in the horizontal cavity (103) such that the hemispherical ends (104a, 104b) face each other at the middle point (O) which is adjacent to the vertical axis (Y-Y');
two flaps (105) with arcuate profile pivoted with the cylindrical housing (101) at one end (105a), wherein each flap (105) from the two flaps (105) defining a plane edge (105b) coupled to the planar end (104aa, 104bb) of the two spring loaded cylindrical shafts (104) and a arcuate edge (105c), wherein the arcuate edges (105c) of the two flaps (105) are adjacent to the vertical axis (Y-Y') and face each other;
wherein, upon insertion of fuel nozzle (106) in the vertical cavity (102) along the vertical axis (Y-y'), the fuel nozzle (106) pushes both the hemispherical ends (104a, 104b) of the two spring loaded cylindrical shafts (104) in axially backward direction to exert outward force on the coupled two flaps (105) to move the arcuate edges (105c) in outward direction to allow complete insertion of the fuel nozzle (106) in fuel tank.

The wrong fuel nozzle inhibitor (100) as claimed in claim 1, wherein diameter (D) of the first aperture (102a) and the second aperture (102b) is greater than diameter (Do) of the fuel nozzle (106).
The wrong fuel nozzle inhibitor (100) as claimed in claim 1, wherein horizontal distance (d) between the facing hemispherical ends (104a, 104b) of the two spring loaded cylindrical shafts (104) is less than diameter (Do) of the fuel nozzle (106).
The wrong fuel nozzle inhibitor (100) as claimed in claim 1, wherein distance (d') between each other facing the arcuate edges (105c) of the two flaps (105) is less than distance (d) between the facing hemispherical ends (104a, 104b) of the two spring loaded cylindrical shafts (104).
The wrong fuel nozzle inhibitor (100) as claimed in claim 1, wherein distance (d') between each other facing the arcuate edges (105c) of the two flaps (105) become equal to diameter (Do) of the fuel nozzle (106) when the fuel nozzle (106) pushes both the hemispherical ends (104a, 104b) of the two spring loaded cylindrical shafts (104).
The wrong fuel nozzle inhibitor (100) as claimed in claim 1, wherein the planar end (104aa, 104bb) of the two spring loaded cylindrical shafts (104) coupled with the plane edges (105b) of the two flaps (105) at distance (a) below pivoted point (105a).
The wrong fuel nozzle inhibitor (100) as claimed in claim 1, wherein the wrong fuel nozzle is gasoline fuel nozzle.
The wrong fuel nozzle inhibitor (100) as claimed in claim 1, wherein the wrong fuel nozzle inhibitor (100) is positioned at filler neck of the fuel tank.

The wrong fuel nozzle inhibitor (100) as claimed in claim 1, wherein diameter (D) of the first aperture (102a) and the second aperture (102b) is in range 32mm to 40mm.