FIELD OF INVENTION
[0001] The present invention relates to fuel system of a two-wheeled vehicle and more particularly to orientation of fuel injector inlet tube on an internal combustion engine.
BACKGROUND OF INVENTION
[0002] A scooter vehicle equipped with fuel injector comprises of a fuel hose, fuel injector, cap injector, intake pipe, fuel tank and other related components. In such applications, fuel injector is placed above the intake port and mounted on intake pipe. The said fuel injector supplies fuel to engine at all operating conditions via cap injector. The said cap injector is connected to fuel hose via quick connector. The orientation of the fuel hose and quick connector connecting to the cap injector is decided by the spout orientation on the cap injector and fuel outlet direction of fuel tank.
[0003] In the known prior art, when viewed from top, in vehicle moving direction, the cap injector spout is placed facing towards left or right of vehicle central plane. In such an arrangement, removing/servicing of quick connector is difficult since the clearance between hose/quick connector and frame member is not adequate. Furthermore, the probability of cap injector being damaged while removing and replacing is very high. Also in the above-mentioned case, the fuel hose curve length will be more which can move in different directions during engine swinging conditions. Such a movement is not desirable since the fuel hose can be damaged while rubbing

with nearby parts causing leakage. Furthermore, a longer length will ultimately lead to undesired increased material cost.
SUMMARY OF THE INVENTION
[0004] To obviate the problems associated with the prior art, the current invention discloses a cap injector spout orientation with respect to the vehicle longitudinal axis maintained such that it will be directed along the vehicle central plane when viewed from the top, during all swinging conditions of the engine. Hence, the connector joining the cap injector spout and fuel hose are directed along the vehicle center plane. This arrangement is maintained with the position of ignition coil, capacitor, ECU (Engine Control Unit); relay etc. all of these being either on the right hand side or left hand side of fuel hose when viewed from the top. The arrangement hereby disclosed has the fuel tank outlet being directed at 0° w.r.t vehicle moving direction. The above arrangement is also flexible to be maintained with the fuel tank outlet being directed at -90° (left) to +90° (right) w.r.t vehicle moving direction.
[0005] During engine swinging conditions, orientation of cap injector spout, quick connector and fuel hose is maintained towards vehicle center plane. The current provision if extended for cap injector spout, in vehicle centre plane or parallel to vehicle centre plane leads to attainment of shortest length of fuel hose and ease of access to fuel quick connector. Due to shortest length of fuel hose, free swinging of fuel hose is restricted, hence avoiding unnecessary impact loading on cap injector spout.

BRIEF DESCRIPTION OF DRAWINGS
Figure lillustrates a typical two- wheeler.
Figure 2illustratesthe top view of two-wheeler.
Figure 3 illustrates the perspective view of the two-wheeled vehicle illustrating the fuel system.
Figure 4 illustrates the fuel inlet to the fuel injector.
Figure 5 illustrates the fuel injector cap.
Figure 6 illustrates the mechanism to align the fuel hose.
Figure 7 illustrates the intake manifold location in the fan housing and deflector arrangement.
Figure 8 illustrates the fuel injector boss arrangement on the air intake manifold.
DETAILED DESCRIPTION OF THE INVENTION
[0006] The internal combustion engine is suspended or mounted in between the front wheel and the rear wheel by way of mountings on the body frame. Continuous left and right maneuvering of the vehicle brings stress on the connected hosepipes, tubes and wires. Many a times, reduction in size of the tubes or hosepipes is desired for cost reduction. This reduction in length of tubes brings a lot of stress on the connected hosepipes, tubes and wires as explained above.

[0007] Due to movement of the hanging hosepipes, tubes or wires in a different direction may result in breakage of the said hosepipes, tubes and wires due to heavy stress. Hence it is desired to orient the nozzle of the inlet ports of various essential elements of an internal combustion engine, so as the stress on the hose pipes, tubes and wires is minimum and they are protected so as to avoid any unnecessary breakage and malfunction during the operation of the vehicle. The current invention describes the inlet nozzle of the fuel injector being oriented on the vehicle longitudinal axis to avoid breakage of fuel hose coming from the fuel tank to the fuel injector.
[0008] Figure lillustratesa two-wheeled vehicle 1, rear wheel 2, engine 3, air filter 4, front wheel 5, floorboard 6, front wheel 7, utility box 8,.side covert), front suspension 10, and rear suspension 11, grab rail 12, tail lamp 13 and rider seat 14. In such a vehicle 1, the fuel tank is placed below the rider seat 14. The cylinder head and the cylinder block of the engine 3 are located below the air filter 4 in the front direction of the vehicle.
[0009] Figure 2 shows top view of the vehicle 1 with depicting central axis of vehicle 20, fuel pipe 21, engine breather hose 22, engine breather port 23, head pipe 24, main tube 25, and cylinder head 26, cap injector 27and fuel tank 28. In the current invention, fuel pipe 21 is connected to the cap injector 27. The cap injector 27 is a portion on the fuel injector body. As shown in the Figure, the cap injector body has the said fuel pipe 21 connected to the cap injector 27 along the central longitudinal axis 20. As it can be seen in the Figure, the engine breather hose 22 is connected to the engine

breather port 23 wherein both the engine breather hose 22 and the engine breather port 231ie along the same central longitudinal axis 20.
[00010] Figure 3 shows the perspective view of the vehiclelalready shown in Figure 1. Figure 3depicts the fuel pipe 21, the engine breather hose 22, head pipe 24, main tube 25, fuel tank 28 and cylinder head 26.As shown in the Figure, the cap injector body has the said fuel pipe 21 connected to the cap injector 27. Though in this perspective view, the central longitudinal axis is not visible, the said fuel pipe 21 connected to the cap injector 27 along the central longitudinal axis 20.
[00011] Figure 4 shows the connection of the fuel pipe 21 with the cap injector 27 in more detail. Figure 5 shows the fuel injector cap 27 and fuel injector inlet 51 in more detail. Figure 4 shows the engine breather hose 22, fuel injector cap 27; hose clamp 41and fuel injector body 45. The hose clamp 41 holds the fuel pipe 21 from excessive movements and jerks while the vehicle is under operation. The inlet of the fuel injector cap 27 on the fuel injector body 45 also lays on the central longitudinal axis 20. The fuel injector body 45 accommodates the fuel injector cap 27.
[00012] Figure 6 shows the hose clamp 41 functioning as hose alignment retainer along the central longitudinal axis 20.1n the present invention and in disclosed embodiment, the hose clamp 41 is mounted and supported on the starter motor 61. In the above-described first embodiment of the current invention, the fuel injector cap 27 with fuel injector inlet 51 as shown in Figure 5 lays in-between the deflector fan housing first mounting 73 and the cowl mountings 76.

[00013] In yet another second embodiment of the current invention, the fuel injector inlet 51 and the fuel pipe 21is assembled along a line parallel, to the central longitudinal axis 20. In this second embodiment, the fuel injector cap 27 with fuel injector inlet 51 as shown in Figure 5 lays in-between the deflector fan housing first mounting 73 and the cowl mountings 76.
[00014] Figure 7 shows fan housing 71, deflector 72, deflector fan housing first mounting 73, deflector fan housing second mounting 74, air intake manifold75 and cowl mountings 76. The fan housing 71 and deflector 72 are fastened together by means of fasteners at the deflector fan housing first mounting 73 and deflector fan housing second mounting 74. Apart from these two mountings for fan housing 71 and deflector 72, other mountings may also be used for increasing the strength of mountings. Air intake manifold is located on the cutout 75.
[00015] Figure 8 shows the air intake manifold with the air intake flange 81; boss fuel injector 82, and air intake conduit 83. The boss orientation 82 is made in such a way so that it lies in between the deflector fan housing first mounting 73 and the cowl mountings 76.

We claim:
1. A fuel system for a two wheeled vehicle (1) comprising:
a fuel tank (28); wherein the said fuel tank (28) is located under rider seat (14) of the said two wheeled vehicle (1);
an internal combustion engine (3); wherein the said internal combustion receives fuel from the said fuel tank (28) through a fuel injector (45);
a fuel pipe (21) which is connected at one end to the outlet of the fuel tank (28) and at the other end to a cap injector (27) of the said fuel injector;
wherein the said fuel pipe (21) and the said cap injector (27) of the said fuel injector lie along a central longitudinal axis (20) of the said two wheeler (1).
2. A fuel system for a two wheeled vehicle (1), the said two wheeled vehicle (1)
comprising:
a fuel tank (28); wherein the said fuel tank (28) is located under rider seat (14) of the said two wheeled vehicle (1);
an internal combustion engine (3);.wherein the said internal combustion receives fuel from the said fuel tank (28) through a fuel injector (45);
a fuel pipe (21) which is connected at one end to the outlet of the fuel tank (28) and at the other end to a cap injector (27) of the said fuel injector;

wherein the said fuel pipe (21) and the said cap injector (27) of the said fuel injector lie along a line parallel to the central longitudinal axis (20) of the said two-wheeler (1).
3. The said fuel system for a two-wheeled vehicle (1) as claimed in Claim 1 wherein the said fuel pipe (21) held, with a hose clamp (41) before being connected to the said cap injector (27).
4. The said fuel system for a two-wheeled vehicle (1) as claimed in Claim 1 wherein the fuel injector boss (82) lays in-between a cowl mounting (76) and a deflector-fan housing mounting (73).