The PPT on the topic Digital Twin Spark Ignition (DTSI) technology used in the two wheelers.This content will be helpful for those whose are intrested in automobile sector, Thank You.

1. By :-
SHREYAS GEET

2.  WHAT IS DTSI ?
 WHY IS IT USED ?
 OPERATING PRINCIPLE
 WORKING
 ADVANTAGES
 DISADVANTAGES
 CASE STUDY/APPLICATION

3.  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.

4.  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.

5.  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
point- type system

6. Oprating principle

7.  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.

8.  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:

9.  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.

11.  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.
 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-to-weight ratio" compared to quite a
few four-stroke engines.

12.  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.

13.  There is high NOx emission.
 If one spark plug get damaged then
we have to replace both.
 The cost is relatively more

14.  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