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AUTOMATIC SPEED CONTROL SYSTEM

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ABSTRACT: -


Every life that alive in this universe likes to enjoy the beauty in the nature. In
this human beings also one kind. Towards achieving these enjoyments human beings
invented & created the vehicles. But actually what happens, they are satisfying their
needs by using these, but also suffering with accidents and losing valuable lives &
property due to rash driving of drivers especially in highly populated regions.
So to avoid rash driving and to prevent loosing of valuable property we need
some safety systems in the vehicles. We can make this true by using sensors and other
electronic components. But those have more cost which causes increase in cost of the
vehicle. With out using those electronic components also we can achieve this by using
mechanical arrangements. To achieve this I designed a simple mechanical system for
providing safety, for avoiding rash driving in highly populated regions.
I designed this by assuming that driver will apply the brake for more no of times
in highly populated regions. Depending on these no of brake movements the system will
control the maximum speed limit of the vehicle. Lower limit of the vehicle will be the
same. If the no of brake applications are more, then the upper limit of the speed of the
vehicle will be decreased proportionately.
So by providing speed breakers in highly populated regions like school zones,
in village’s side by the high ways we can reduce the speed of the vehicle (Lorries, autos)
to avoid rash driving or to decrease effect of the accidents.



INTRODUCTION: -


For avoiding rash driving of the drivers we have to provide safety systems
with in the vehicles mainly for 4-wheelers. We can make this by using sensors and
electronic circuits, which costs more. Rather than providing such high cost equipment we
can achieve the same thing by mechanical means.
In this system there is one power source (battery) as input, one controlling
element (toroidal coil with controlling rod arrangement), and small modifications in the
already existing conventional design of S.I &C.I engines and connections with brake,
which simply acts as a switch.
By using simple system we can control automatically the speed of the
vehicle in highly populated regions with out interference of the human. The vehicle will
move with designed speed (low speed) of the control system only even though the driver
wants to move the vehicle with high velocities. About the working and description of the
components, which I am using, will have in following discussion



WORKING: -


The system will start working only when we apply the brake for number of
times. The brake will act like a switch. When the brake is pressed the circuit will be
completed the. Battery will start conducting the charge, which will be stored in the
toroidal coil.
Due to high valued resister in the parallel circuit and low resistance of coil 95% of
charge will be entered and stored with in the coil. This charge will create magnetic field
around the coil that will pull the controlling rod. This controlling rod movement will be
used for controlling the fuel supply system for varying the fuel rate entered into the
combustion chambers.
In case of S.I. engine the controlling rod will force or move another needle, which
will obstruct the flow area in main fuel nozzle so with this effect the quantity of fuel
entered will be decreased. It cannot affect the airflow rate or any other thing it only
reduces the quantity of fuel entered.
In case of C.I. engine the controlling rod movement will be used for rotating
the circular ring on fuel induction pump, which will control the opening of hole through
the port, when the hole is opened the fuel will be spilled out.



LIMITATIONS: -


 There is a chance of disconnecting the battery with the system when driver wants. So
to reduce this there is requirement of frequent checking’s of the complete system by some
external government employees.
 In case of C.I. engine the system will be little complicated which is difficult to
manufacture.
 The system will start working only when there is application of brake other wise it
will not start working.

CONCLUSION: -

So finally we can use this system for S.I. engines, C.I. engines and also for gas
engines. We can vary the value of variable résistance as per our requirements. For busses
and Govt. vehicles we will place this resistance of having low value. So for these vehicles
the time for, which the system is in active condition, is very small. So the time for which
the vehicle will move slowly will also very small.