Transcript digital twin spark ignition(dtsi)

PRESENTED
BY
 JYOTEN PANDITPAUTRA(1225016)
 SUVARNA GHULE(1225017)
 YOGI BHIMANI (1225020)
 DHEER DEDHIA (1225024)
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WHAT IS DTSI ?
WHY IS IT USED ?
OPERATING PRINCIPLE
COMPONENTS
WORKING
ADVANTAGES
DISADVANTAGES
FUTURE SCOPE
REFERENCES
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DTSI means Digital Twin Spark Ignition
system.
It has Two Spark Plugs that are use to ignite
the charge in the combustion chamber.
The Twin Spark Plugs ensure faster and better
combustion.
In this system the spark timing is controlled
by a computer that continuously adjust
ignition timing to obtain Optimum
combustion.
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In conventional engines
the air-fuel mixture does
not get combusted
completely. So We use
DTSI technology.
To reduce dependence on
mechanical system for
controls.
For more accurate and
precise ignition timing.
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In the DTSI system a timer is employed in the
distributor instead of contact breaker.
This timer may be a pulse generator which
triggers the ignition module, also called
electronic control unit. (E.C.U.) .
This control unit primarily contains transistor
circuit whose base current is triggered off & on
by timer which result in starting & stopping of
primary current.
Other than this, the electronic ignition system
work similar to the conventional electrical pointtype system
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MICROPROCESSORS/CPU : It has taken over
many of the tasks in cars that were formerly
performed by vacuum, mechanical or
electromechanically devices. When properly
programmed, they can carry out explicit
operations with blinding speeds and almost
flawless consistent.
POSITION SENSORS: The CPU receives feedback
from the sensors and checks along the
programmed value. Depending on the input,
the computer will control the actuators until the
programmed results are obtained.
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A/D CONVERTER: Output of some position
sensor is in the analog form while computer
can only read in digital form. To overcome
this communication problem all analog
voltage are converted in digital format by a
device known as an analog to digital
converter. This produces a digital wave
signal that can directly go to the CPU.
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The ignition system on the Twin spark is a digital
system with static spark advance and no moving
parts subject to wear. It is mapped by the
integrated digital electronic control box which
also handles fuel injection and valve timing. It
features two plugs per cylinder.
This innovative solution, also entailing a special
configuration of the hemispherical combustion
chambers and piston heads, ensures a fast, wide
flame front when the air-fuel mixture is ignited,
and therefore less ignition advance, enabling,
moreover, relatively lean mixtures to be used. As
a result, the adoption of twin spark ignition
yields:
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Digital Twin Spark ignition engine has two Spark
plugs located at opposite ends of the combustion
chamber and hence fast and efficient combustion is
obtained.
The benefits of this efficient combustion process can
be felt in terms of better fuel efficiency and lower
emissions.
The ignition system on the Twin spark is a digital
system with static spark advance and no moving
parts subject to wear.
It is mapped by the integrated digital electronic
control box which also handles fuel injection and
valve timing. It features two plugs per cylinder.
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This innovative solution, also entailing a
special configuration of the hemispherical
combustion chambers and piston heads,
ensures a fast, wide flame front when the airfuel mixture is ignited, and therefore less
ignition advance, enabling, moreover,
relatively lean mixtures to be used.
This technology provides a combination of
the light weight and twice the power offered
by two-stroke engines with a significant
power boost, i.e. a considerable "power-toweight ratio" compared to quite a few fourstroke engines.
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Less vibrations and noise.
Long life of the engine parts such as piston rings and
valve stem.
Decrease in the specific fuel consumption.
No over heating.
Increase the Thermal Efficiency of the Engine & even bear
high loads on it.
Better starting of engine even in winter season & cold
climatic conditions or at very low temperatures because of
increased Compression ratio.
Because of twin Sparks the diameter of the flame increases
rapidly that would result in instantaneous burning of fuels.
Thus force exerted on the piston would increase leading to
better work output.
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There is high NOx emission.
If one spark plug get damaged then we have
to replace both.
The cost is relatively more
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This technology is presently being used by
one of the largest two wheeler manufacturers
of India Bajaj Ltd.
They have a Patent of this technology which
gives them an edge over the competitors.
They have implemented this in most of their
product line up.
PULSAR SERIES, DISCOVER RANGE
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The case study can be explained by the video.