The present invention relates to the field of motorcycle and safety. More
specifically the present invention is directed towards the prevention of water
damage to the motorcycle through fuel tank.
Background Of The Invention
A fuel tank (also called a petrol tank or gas tank) is a safe container for
flammable fluids. Though any storage tank for fuel may be so called, the term is
typically applied to part of an engine system in which the fuel is stored and
propelled (fuel pump) or released (pressurized gas) into an engine. Fuel tanks
range in size and complexity from the small plastic tank of a butane lighter to
the multi-chambered cryogenic Space Shuttle external tank. While most tanks
are manufactured, some fuel tanks are still fabricated by metal craftsmen or
hand-made in the case of bladder-style tanks. These include custom and
restoration tanks for automotive, aircraft, motorcycles, boats and even tractors.
Construction of fuel tanks follows a series of specific steps. The craftsman
generally creates a mock up to determine the accurate size and shape of the tank,
usually out of foam board. Next, design issues that affect the structure of the
tank are addressed - such as where the outlet, drain, fluid level indicator, seams,
and baffles go. Then the craftsmen must determine the thickness, temper and
alloy of the sheet he will use to make the tank. After the sheet is cut to the
shapes needed, various pieces are bent to create the basic shell and/or ends and
baffles for the tank. Many fuel tanks' baffles (particularly in aircraft and racecars)
contain lightening holes. These flanged holes serve two purposes, they reduce the
weight of the tank while adding strength to the baffles. Toward the end of
construction, openings are added for the filler neck, fuel pickup, drain, and fuellevel sending unit. Sometimes these holes are created on the flat shell, other
times they are added at the end of the fabrication process. Baffles and ends can be
riveted into place. The heads of the rivets are frequently brazed or soldered to
prevent tank leaks. Ends can then be hemmed in and soldered, or flanged and
brazed (and/or sealed with an epoxy-type sealant) or the ends can be flanged and
then welded. Once the soldering, brazing or welding is complete, the fuel tank is
leak-tested. The maximum distance a combustion-engine powered car with a full
tank can cover is the product of the tank capacity and its fuel efficiency (as in
miles per gallon). While larger tanks increase the maximum distance, they also
take up more space and (especially when full) add to the total weight, requiring
higher fuel consumption for the same performance. Fuel-tank capacity is
therefore the result of a trade-off in design considerations. For most compact
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cars, the capacity is in the range 45–65 litres (12–17 US gal); the original model
Tata Nano is exceptional with its 15 litres (4 US gal) fuel tank. SUVs and trucks
tend to have considerably larger fuel tanks.
For each new vehicle a specific fuel system is developed, to optimize the use of
available space. Moreover, for one car model, different fuel system architectures
are developed, depending on the type of the car, the type of fuel (gasoline or
diesel), nozzle models, and region.
Two technologies are used to make fuel tanks for automobiles:
• Metal (steel or aluminum) fuel tanks welded from stamped sheets. Although
this technology is very good in limiting fuel emissions, it tends to be less
competitive and thus less on the market, although until recent times automotive
fuel tanks were almost exclusively made from sheet metal.
• Plastic high-density polyethylene (HDPE) fuel tanks made by blow molding.
Blow molded HDPE can take complex shapes, for instance allowing the tank to
be mounted directly over the rear axle, saving space and improving crash safety.
Initially there were concerns over the low fracture toughness of HDPE, when
compared to steel or aluminum. Concern for safety and long term ability to
function should be considered and monitored.
Modern cars often feature remote opening of the fuel tank fuel filler flap using
an electric motor or cable release. For both convenience and security, many
modern fuel tanks cannot be opened by hand or otherwise from the outside of
the car.
Reserve tank
Sometimes called the reserve tank is a secondary fuel tank (in many cars/bikes it
contains around 15% of the capacity of the primary tank) these are more
commonly found on bikes, older cars (some without a fuel gauge) and vehicles
designed for long distance or special use. A light on the instrument panel
indicates when the fuel level dips below a certain point in the tank
Ship in a bottle
The ship in a bottle fuel tank is a manufacturing design developed by TI
Automotive in Rastatt Germany wherein all fuel delivery components including
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the pump, control electronics and most hosing are encased within a blow molded
plastic fuel tank,[3] and named after the traditional ship in a bottle mechanical
puzzle
Racing fuel cell
A racing fuel cell has a rigid outer shell and flexible inner lining to minimize the
potential for punctures in the event of a collision or other mishap resulting in
serious damage to the vehicle. It is filled with an open-cell foam core to prevent
explosion of vapor in the empty portion of the tank and to minimize sloshing of
fuel during competition that may unbalance the vehicle or cause inadequate fuel
delivery to the motor
Placement and safety
For safety considerations, in modern cars the fuel tank is usually located ahead
of the rear axle, out of the crumple zones of the car.
Problem
Some times water get into fuel tanks and get mixed with fuel it can happen in
any vehicle with a fuel tank like cars, bikes, motorcycle, any other vehicle which
results in water getting into the engine and causing failure.
Prior Art
Sr.
No.
Patent application
no.
Summary of invention Comparison with
present invention
1. US8096177B2 An ultrasonic-based
apparatus and method
for fuel inventory
measurements and for
the detection and
characterization of
materials in a fuel tank,
including sludge, water,
microorganisms and
The present invention is
circuit based fuel tank
water detector.
Sometimes fuel present
in the cars and bike get
mixed with water and
forces the motorcycle to
stop or even makes the
motorcycle defective.
4
materials of different
viscosity and densities
that are present in the
tank, presented in an
easy-to-interpret
picture display that can
be remotely located
from the tank.
The developer has
developed a simple
method to solve this
problem as the circuit
will help us to detect
the water present in the
fuel tank and indicate us
with the alarm system
present in the circuit the
owner of motorcycle
will be aware of water
in fuel tank. Circuit
works on DC supply
which includes
transistor, battery and
buzzer. The circuit will
be able to detect water
as the circuit will only
connect with water and
not with petrol.
Whenever the circuit
detects the water it will
trigger the alarm and
aware the driver about
the water in fuel tank.
2. US7895890B2 The liquid depth
sensing and
identification system
determines both the
pressure head or depth,
and therefore the
quantity, of a liquid in a
tank, as well as
determining the
characteristics of the
liquid at the bottom of
the probe. Two
The present invention is
circuit based fuel tank
water detector.
Sometimes fuel present
in the cars and bike get
mixed with water and
forces the motorcycle to
stop or even makes the
motorcycle defective.
The developer has
developed a simple
5
principles of operation
are disclosed herein.
The system may use a
gas bubble collector
about the outlet end of
the purge tube, with the
difference in height of
the collector and purge
tube mouths defining
the very small
difference in pressure
head required to
resolve the bubble
emission characteristics
produced in different
liquids. Alternatively,
the system incorporates
a mass flow sensor
capable of detecting
minute changes in mass
flow as bubbles are
emitted from the purge
tube in order to
determine the type and
characteristics of the
liquid. The system
operates using an open
loop principle of
operation, with no
feedback provided to
control the purge pump
method to solve this
problem as the circuit
will help us to detect
the water present in the
fuel tank and indicate us
with the alarm system
present in the circuit the
owner of motorcycle
will be aware of water
in fuel tank. Circuit
works on DC supply
which includes
transistor, battery and
buzzer. The circuit will
be able to detect water
as the circuit will only
connect with water and
not with petrol.
Whenever the circuit
detects the water it will
trigger the alarm and
aware the driver about
the water in fuel tank.
Existing method consists of ultrasonic waves and other complex methods. There
is no such circuit of transistor and resistance is used. Thus none of the prior art
anticipates the present invention.
6
INNOVATIVE SOLUTION PROPOSED BY INVENTOR
Sometimes fuel present in the cars and bike get mixed with water and forces the
motorcycle to stop or even makes the motorcycle defective. The present
invention will help to solve this problem as the circuit will help us to detect the
water present in the fuel tank and indicate us with the alarm system present in
the circuit the owner of motorcycle will be aware of water in fuel tank. This will
help in preventing the chances of failure of motorcycle engine. Also its cost
effective and money saving method.
OBJECTS OF THE PRESENT INVENTIONS
1. The objective of the present invention is to provide extra safety and add
efficiency to the vehicle.
2. The present invention also helps in saving a lot of time and money.
SUMMARY OF THE INVENTION
Sometimes fuel present in the cars and bike get mixed with water and forces the
motorcycle to stop or even makes the motorcycle defective. The present
invention will help to solve this problem as the circuit will help us to detect the
water present in the fuel tank and indicate us with the alarm system present in
the circuit the owner of motorcycle will be aware of water in fuel tank. Circuit
works on DC supply which includes transistor, battery and buzzer. Transistor
and resistance will be connected as shown in FIG 2 then the circuit will be able
to detect water as the circuit will only connect with water not petrol. A circuit of
transistor, resistance and copper wires is made on the base of fuel tank and is
used as switching element buzzer and wires are connected to this circuit and will
not be triggered until water touches the circuit as the circuit has connectivity for
water only.
DESCRIPTION OF THE DRAWINGS
FIG 1 : Reference figure indicating general parts of motorcycle
FIG 2 : Circuit diagram for water detector in fuel tank
 1 - battery
 2- Buzzer
 3- Transistor
 4- Resistance
7
 5- Wires
FIG 3 : Schematic diagram of water sensor
 Water Sensor
 Connecting wires with circuit
 Heavy material
FIG 4 : Showing implementation of sensor in fuel tank
 Fuel tank
 Water sensor
NOVELTY
The novelty of the present invention lies in developing simple and very cost
effective method for safety of bike, saving money and saving time of the society

I CLAIM:
1. A safety system to detect water in fuel tank, WHEREIN the same consists of:
- Plurality of a circuit of transistors and resistance;
- Transitor, resistance, buzzer, wires which helps to know about water in fuel tanks;
- All components works on DC supply,
And WHEREIN the same fixed exactly at the base of the fuel tank.
2. The system as claimed in claim 1 WHEREIN in normally OFF condition:
- A circuit of transistor, resistance and copper wires is made on the base of fuel tank and is
used as switching element;
- buzzer and wires are connected to this circuit and will not be triggered until water touches
the circuit.
3. The system as claimed in claim 1 WHEREIN the use of the mechanism consist of the following
steps:
- Whenever water gets mixed with fuel it wile settle down and touch the surface of fuel tank,
the circuit is interupted;
- The circuit will start and trigger the buzzer which indicated water in fuel tank.