1. Drunk Driver Detector
And
Dynamic Speed And
Torque Control
By
MOHAN RANGA K, BANTI KUMAR,RAHUL RANJAN, MIT, MANIPAL

2. BREATH ANALYSER IGNITION INTERLOCKING
SYSTEM
OVERVIEW :
As we know from the past few years the cases of DUI/DWI
across the world as well as in our nation has increased exponentially,
because of negligence and affecting others along the path. So to put a cap
on this major problem, we suggest a system which overrides the car’s
ignition system from starting the car while being intoxicated. It will be
activated only when the alcohol level in the body is beyond the threshold
value which is provided by the state/central law. It keeps checking the
alcohol level intermittently which acts as a failsafe. And it alerts the
emergency contact of the intoxicated person, so that they can arrange for
safe mode of transport for him/her. If not an alternative mode of
transport(Taxi services) can be made available for the person to avoid any
harm that he/she may inflict on himself/herself or to others. This system
can be implemented on all variants of automobiles.

3. Block Diagram & Process Flow Chart :
Breath
Analyzer
GPS Module
Microcontroller
Unit
Ignition
System
Bluetooth
Phone
Block Diagram
Flow Chart

4. Working Sequence:
1. Once the key is put to ignition, the microcontroller unit will start to monitor
the alcohol level through the breath analyzer.
2. If the alcohol level is more then the specified threshold value then the
microcontroller will override the ignition system and will not allow the ignition
of the engine.
3. And at the same time the microcontroller will connect to the drivers phone via
Bluetooth and will send a message to the emergency contact or to the taxi
service with the current GPS co-ordinates of the car/driver (depending on GPS
module the microcontroller has access to).
4. Initially if the engine starts because of alcohol level below the given
threshold, in such case the microcontroller unit will be monitoring the sensor
data periodically. If the alcohol level breaches the threshold level then it will
slow the vehicle down to a stand still condition and will follow the steps 2&3
of the above sequence.

5. Dynamic control of Speed and torque
Overview:
All the automobiles are designed for a specific loading
condition. But there are many who do not care about these loading
restrictions that are specified by the manufacturers and will overload the
vehicle anyways. So what we are suggesting is that, we implement a
dynamic engine control system that takes feedback signals from load and
speed sensors from various sections of the automobile. This feedback
signals provides the necessary corrective signals to the engine control
unit such that the engine will not be overloaded. And it will also lock the
maximum speed which the vehicle can attain depending on the loading
and the road conditions.

6. Block Diagram :
Load cell
Microcontroller
Unit
Engine control
unit
Gear system
Speed and
Torque sensor
unit

7. Working:
 Once the keys are inserted the microcontroller subsystem will also be activated.
 The data from load sensors will be acquired by the microcontroller and the
microcontroller will set the engine parameters, such that the torque and the
speed output of the engine is within the limit.
 If the vehicle approaches the speed limit, the engine management subsystem
will kick in and will make sure the vehicle will not breach the maximum speed
that is formulated by the microcontroller unit.
 And it will make sure that the wheels are getting the required amount of torque.
 If the vehicle approaches a gradient, then the dynamic management system will
change the engine control parameters such that the speed to torque ratio is
maintained in such a way that the vehicle can accelerate at constant torque
required for the current loading condition.