This is the presentation on DTS-I technology i.e. Digital Twin Spark Ignition Technology. This presentation shows the various advantages of DTS-I engine over the convention IC engines

1. PRESENTED BY –
GAURAV SHUKLA

2.  Introduction
 Why it is called “Digital”?
 Combustion without using DTS-i Technology
 Combustion process with DTS-i Technology
 Detonation in DTS-i Engine
 Advantages of DTS-i Technology over conventional engine
 Disadvantages of DTS-i Technology
 Applications
 Advancement of DTS-i Technology
 Conclusion
 References
OVERVIEW

3. INTRODUCTION
 DTS-i stands for “Digital Twin Spark Ignition”.
 In actual practice, complete combustion is not possible due to
various losses in the combustion chamber as well as design of
the internal combustion engine.
 This can be done by using two spark plugs which spark
alternatively at a certain time interval so as increase the
diameter of the flame & burn the fuel instantaneously
 This system is called DTSI (Digital Twin Spark Ignition system).
In this system, due to twin sparks, combustion will be
complete.

4. Why It is called “Digital” ?
 Because it has some intelligent device that controls the fuel
supply according to the varying loads.
 This device is known as the “Electronic Control Unit” (ECU).
 It is the microprocessor based system and also brain of fuel
injection system and spark timing.
 It collects the information given by various sensors and
accordingly operate the spark plug.

5. Combustion without using DTS-i
Technology
 The spark plug ignites the air-fuel
mixture and flame continuously
spreads.
 There is delay to reach the furthest
part of the combustion chamber.
 There are some non combusted fuel
within the chamber and, overall, the
combustion is slow and inefficient.
 In simple words, the air and fuel
mixture does not burn completely.

6. Combustion process with DTS-i Technology
 The twin spark plugs are fixed to the
cylinder head maintaining an angle
about 90° to valve axis.
 The air-fuel mixture gets ignited in a
way that creates two flame fronts.
 Therefore, a reduction in flame travel
of the order of 40 per cent is achieved.
 Hence, the outcome of this is more
torque, better fuel efficiency and
lower emissions.

7. Combustion Processes in both conventional engine and DTS-I engine

8. Detonation in DTS-i Engine
 Detonation is the main problem in petrol engine.
 Detonation occurs when the flame travel time from centre to
the side walls increases.
 It happens often in the engines having single spark plug.
 This is overcome by the DTSi by having two spark source on the
opposite sides which reduces the flame travel as stated above.
Hence no detonation……

9. Advantages of DTS-i Technology over
conventional engine
 Less vibrations and noise.
 Long life of the engine parts such as piston rings and valve
stem.
 Low specific fuel consumption.
 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.

10. Disadvantages of DTS-i Technology
 There is high NOx (nitrogen oxide) emission.
 If one spark plug get damaged then we have to replace both.
 Cost is double the amount on spark plugs when it is time to
replace them.
 The engine tends to overheat and loose power at higher speeds
as compared to a single plug engine.
 In case the Engine is kept unused for a long time soiling of
spark plugs occur.

11. Applications
It uses in automotive engines. In India Bajaj has patented for
dts-i technology. At present platina, xcd125, 135, discover150,
pulsar135, 150, 180, 200, 220 etc. are using the dts-i(digital
twin spark ignition system). Which means the petrol enters
into the cylinder burns more efficiently.

14. Advancement of DTS-i Technology
DTS-i engine can be further tuned to deliver exhilarating
performance or exceptional mileage. The further advances of
DTS-I technology are:
 Digital Twin Spark – Swirl Induction (DTS - Si)
 Digital Twin Spark – Fuel Injection (DTS - Fi)

15. Digital Twin Spark – Swirl Induction (DTS - Si)
 The Swirl Induction means producing higher turbulence in the
combustion chamber.
 This can be done by making slight modifications in the ports
positioning of engine.
 Due to imparting swirling motion to the air-fuel mixture, it gets
completely mixed in proper composition giving rise to complete
combustion.
 Combustion efficiency in lean air-fuel mixture conditions can be
further improved by generating high turbulence in the
combustion chamber.

16. Digital Twin Spark – Fuel Injection (DTS-Fi)
 This technology is used for increasing the fuel efficiency in
power bikes.
 When there is fluctuations in load either it is increasing or
decreasing accordingly the fuel consumption also varies.
 Fuel supply is decided by carburetor and it is impossible for a
conventional carburetor to take care of the fuel supply for
these varying loads.
 This can be improved by the device called Electronic Control
Unit (ECU).
 It processes information sent by various sensors and instantly
determines optimum fueling and spark timing for various
engine-operating conditions.

18. Advantages of DTS - Fi Technology
 Better low end torque.
 Lower fuel delivery and optimization of spark timing.
 Improved cold start, quick warm up and excellent response to
the sudden acceleration.
 Lower emission levels.
 Self detection and communication of fuel system
malfunctioning if any.

19. Conclusion
Hence it can be concluded that the application of these
technologies in the present day automobiles will give the present
generation what they want i.e. power bikes with fuel efficiency.
Since these technologies also minimize the fuel consumption and
harmful emission levels, they can also be considered as one of the
solutions for increasing fuel costs and increasing effect of global
warming.