The present invention relates to the reserve fuel system of a vehicle. In particular the invention, is concerned with stopping the fine contaminants which can go with the fuel thereby only clean fuel would be fed to the engine.
BACKGROUND OF THE INVENTION
As the fuel invariably carries numerous solid contaminants which are harmful to the engine or at least necessitate frequent servicing of carburetor/injector, there is need in the art to give a design so as to arrest the ingoing of these particles. In
) case of 2-wheelers/3-wheelers, usual practice as per the prior art is that reserve fuel is taken out from a pipe connected to the bottommost point of the tank (1) where we find the settled particles. Also in case of 4-wheelers, the fuel take-out pipe (9) which comes out from the top of tank (8) (as engine and tank are at the same level or tank is even lower) is normally dipping too low into the tank near
i the particles, so the fuel is prone to catch particles. Therefore to avoid any sort of trouble, a foolproof method has to be invented so that this so-called 'dirty' reserve fuel is prevented from being used in the engine. This invention is based on this requirement.
) OBJECTS OF THE PRESENT INVENTION
It is the primary object of the present invention to provide a FUEL RESERVE
SYSTEM in a vehicle.
It is the main object of the present invention to provide a fuel system which is safe
i.e. by arresting of particles going with the fuel from the tank. So only clean fuel i shall be fed to the engine cylinder.
It is an object of the present invention to provide sieves at the tank ends of fuel
pipes to be doubly sure that clean fuel goes out of the tank.
It is another object of the present invention to dispense with the fuel filter to save
recurring costs. ) It is an object of the present invention to do away with unnecessary servicing of
carburetor, injector etc. so also to save time.

It is another object of the present invention to ensure a very long life of the piston as contaminants/fine particles cannot enter the cylinder.
It is yet another object of the present invention to provide drain system so that once a while the so-called 'dirty' fuel can be drained out and reused after proper i filtering.
SUMMARY OF THE INVENTION
The aim of this invention is to regulate the reserve systems of 2-wheeler/4-wheeler whereby lot of fine particles going with the fuel block the passages of the
) carburetor/injector en route to the vehicle engine. This creates frequent necessity of cleaning/servicing of carburetor or injector.
As per an aspect, the remedy which has been thought of is to have rearrangement of fuel pipes by adjusting their relative heights (detailed later) in the tank so that particles are not able to be picked up by the fuel making the fuel safe for working.
i Thereby the contaminated part of fuel staying at the tank bottom shall not enter the engine. This fuel shall be called 'unusable fuel'. Reserve and open systems (redefined) shall not allow any particles to enter the fuel.
BRIEF DESCRIPTION OF THE DRAWINGS
) Two Drawings No. 1 and No. 2 are made for the purpose of present Invention. Drawing No. 1- This shows the fuel tank (1) of a 2-wheeler/3-wheeler. The end of reserve fuel pipe (2) is raised quite above the bottom of the tank while open fuel pipe (3) end goes still higher in the tank. At the outside of the tank these 2 pipes meet at the Tap (4). With the float (5) at various levels, the float unit (6) shall give
i corresponding signal to the fuel level meter (7) viz. in green, yellow colours for the open fuel and red colour for the reserve fuel.
Drawing No. 2- This is meant for a 4-wheeler tank (8). In this case the fuel to the
engine goes by pressure of a fuel pump and not by gravity (as engine and tank are
) at the same level or tank is even lower). There is a fuel takeout pipe (9) through
the top of the tank and no separate reserve pipe. Various positions of float (10)

correspond to the reserve and open fuels messaged by float unit (11) and indicated by green, yellow and red colours in fuel level meter (12).
DETAILED DESCRIPTION OF THE INVENTION
i When reserve fuel is used which contains many fine solid particles, the result is
that there is frequent necessity of cleaning/servicing of carburetor or injector.
Even the engine is likely to be damaged on this account. Therefore there is
necessity to have a safe reserve system.
Refer to Drawing No. 1 showing the tank of a 2-wheeler. As per an aspect, the ) remedy is to have a reserve fuel pipe (2) inside of fuel tank (1) with its end kept at
a safe level of fuel known by experience.
As per an aspect, to cater to 'open fuel', the open fuel pipe (3) end is kept
sufficiently higher than reserve fuel pipe (2) end as per the ratio of open fuel and
reserve fuel. Ratio could be kept as 4:1/3:1. i As per another aspect, both pipes shall come out from the bottom of the tank and
end at the 2 holes placed in the fuel tap (4) wherefrom 'open/reserve' fuel shall be
selected by operating its knob.
As per another aspect, the tap (4) which shall house ends of reserve and open fuel
pipes from the tank shall be suitably fixed with the tank with airtight packing. ) As per an aspect, so the fuel, now below the reserve fuel pipe end is prevented
from being used and is termed as 'unusable' fuel. The fuel between the 2 pipe
ends is now redefined as 'reserve fuel' and fuel upper to open fuel pipe end, as
'open fuel'.
As per another aspect, as fuel with fine particles settled at bottom of the tank is i prevented from entering the engine, there are little chances of fuel particles/
residues to clog injector or carburetor. To encourage the rider to use new design,
tank (1) capacity must be increased by the now termed 'unusable' quantity.
As per another aspect, that in case of 4 wheelers (Drawing No. 2), there is only
one takeout pipe (9) for the fuel and its end is to be placed at the upper level of ) unusable fuel. Here also the float unit (11) is placed such that its float (10)
remains at the level of end of this fuel pipe to match last point of red sector of fuel

level meter (12) to indicate running out of reserve fuel. Then red, yellow and green sectors shall be suitably matched with the float to show beginning of reserve and open fuel levels in the fuel level meter (12). Drawing No. 2 shows the arrangement of the float and pipes in the tank of a 4-wheeler.
i INDICATIONS IN FUEL LEVEL METERS- These days in all vehicles, fuel level meters showing 3 fuel levels are in use. These are indicated by 3 colours viz. green, yellow and red, put either in sectors or scales. Indications of fuel quantity like "Vi, V2, 3/4, full" are also in vogue. It is advisable that for safety the fuel should be refilled as soon as tank runs out of open fuel to honour the purpose of reserve.
)
ADVANTAGES OF THE PRESENT INVENTION
Fuel filters are not required and this avoids the recurring costs.
Fuel filters if provided for extra safety shall have a very prolonged life.
Rare servicing called for of carburetors, injectors etc.
i Also no wastage of time on above account.
Since only clean fuel enters the engine, engine shall not catch any dust and piston life shall be longer. This also leads to smooth running of engine. Also not to forget, once a while the dirty fuel must be drained out and tank serviced. If this fuel is worth reuse, this may be done after thorough filtering.
) Good luck!
HINT TO MATCH DIFFERENT FUEL LEVELS WITH FUEL LEVEL METER-
In case of 2 (or 3) - wheelers, the float unit (6) fitted on the tank can be positioned i in such a way that its float (5) shall be at its bottommost position at the fuel level
of end of reserve fuel pipe (2). This shows reserve fuel end & matches the end of
red sector of the fuel level meter (7).
The float (5) when raised at position of open fuel pipe (3) end will correspond to
beginning of red sector of the fuel level meter (7) to indicate reserve fuel quantity/ ) level. Further higher levels of float (5) correspond to yellow and green sectors

showing open fuel levels. Drawing No. 1 shows the arrangement of the float and pipes in the tank of a 2 wheeler.
In case of 4 wheelers, there is only one takeout pipe (9) for the fuel and its end shall be placed at the upper level of unusable fuel. Here also the float unit (11) shall be positioned such that its float (10) remains at the level of end of this fuel pipe to match end of red sector of fuel level meter (12) to indicate end of reserve fuel. Then red, yellow and green sectors shall be suitably matched with the float to show beginning of reserve and open fuel levels in the fuel level meter (12). Drawing No. 2 shows the arrangement of the float and pipes in the tank of a 4-wheeler.

We Claim:

1. A newly designed tank in case of 2-wheeler/3-wheeler such that fuellines going to the engine are so arranged inside the tank that the so-far-called 'reserve fuel' standing at the bottom of the tank containing dust/other fine solid particles is prevented from being fed to engine which can harm the latter. The equipment characterised in that consists of- (for 2-wheeler tank) fuel tank (1), reserve fuel pipe (2), open fuel pipe (3), fuel tap (4), float (5), float unit (6), fuel level meter (7) and (for 4-wheeler tank) tank (8), fuel pipe (9), float (10) float unit (11) and fuel level meter (12) as described in claims 2-6 and shown in Drawings 1 and 2.
2. The equipment as claimed in claim 1 wherein in case of 2-wheeler, the end of reserve fuel pipe (2) is fixed sufficiently high in the tank so that the settled particles remain far from its reach, so are not able to be picked up. The end of open fuel pipe (3) is kept still higher so that the fuel between the 2 pipe ends would now act as 'reserve' fuel and fuel higher to open fuel pipe end, as 'open' fuel. Now the fuel, below the reserve fuel pipe end shall not be fed to the engine and is thus known as 'unusable' fuel (refer to Drawing No. 1). Impurities are retained in this part of fuel.
3. The equipment as claimed in claim 1 comprising the reserve (2) and open fuel pipes (3) which run side by side in the tank (1) are made a part of the fuel tap (4) in design in case of 2 wheelers.
4. The equipment as claimed in claim 1 wherein for maintenance purposes, the tap (4) is made fittable/openable from bottom of the tank without disturbing anything inside of the tank. It is designed as an outer part or is at least easily approachable for tank cleaning.
5. The equipment as claimed in claim 1 necessitating that in case of 2 (or 3) -wheelers, the float unit (6) fitted on the tank is positioned in such a way that its float (5) kept at the beginning position of end of open fuel pipe corresponds to beginning of red sector of the fuel level meter and shows reserve fuel quantity. And the float when kept at the level of reserve fuel pipe (2) end i.e.

at its bottommost position shows finishing of reserve fuel & corresponds to end of red sector of the fuel level meter (7). Further higher levels of float (5) in the fuel correspond to yellow and green sectors showing open fuel levels (refer to Drawing No. 1). 6. The equipment as claimed in claim 1 providing that in case of 4 wheelers, there is just one fuel pipe (9) which comes out from top of tank (8). Its end is placed at the level below which the fuel is not to be used. Here also the float unit (11) is positioned such that lowermost position of float (10) corresponds to the level of the end of the fuel pipe. This shows finishing of reserve fuel and matches the end of red sector of fuel level meter (12). Higher to the fuel pipe end, float (10) level is suitably matched with red, yellow and green sectors to show the reserve & open fuel levels (Refer to Drawing No. 2).