37-soumen das_dtsi engine

7/31/2019 37-Soumen Das_DTSI Engine

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Seminar on :-

Digital Twin SparkIgnition(DTSI)

A new revolution of Twin Sparkin I.C. Engine


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Introduction

A conventional 4 Stroke enginehas a Single Spark Plug and leadsto inefficient combustion.

Required Basic design for :

i)Uniform power delivery inall operating conditions.

ii)A high degree of drivability.

iii)Long service life.


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So , What is DTSI ?? Two spark plugs at

opposite ends ofcombustion chamber.

Hemispherical chambers,

piston heads. Helps in better fuel

efficiency and loweremissions.

Fast and efficientcombustion is obtained.


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Main Characteristics

Digital electronic ignition with two plugs percylinder and two ignition distributors.

Twin overhead cams with camshaft timing

variation.

Injection fuel feed with integrated electronictwin spark ignition.

A high specific power. Compact design with superior balance.


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Engine comprises of.???

Four-in-line cylinder

Light weight due to allAluminum - alloy engine

block Eight counterweights

ensure optimal balancingof the high strength nitride

steel crankshaft The pressed-in cast iron

cylinder liners for moreeffective heat dissipation


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Valve Drive

Valves directly acts in V-configuration (46o).

Valve timing Actuator operatesexhaust and intake valves.

At high and medium-highengine speeds, cylinder filling isoptimal.

At low and medium-low enginespeeds, fluctuation-freeoperation is ensured withreduction in specific fuelconsumption.


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Fuel Injection

Fuel injection is used toensure excellent fuelefficiency as well asenvironmental friendliness.

The fuel supply componentconsists offuel pump,modularized regulator andfilter& a small injector.

The injector injects finelyatomized spray of fuelthrough 6 hole type injectors.


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Ignition It is controlled by integrated

digital electronic control boxcalled Capacitor DistributedIgnition(CDI).

DTSI yields:

1. More effective combustion atlow load and at idling speed.

2. A sizeable reduction in specificfuel consumption.

3. Less chance of ignition systemfailure.


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Maiden DTSI First 4-wheeler to use DTS-i.

It is a Superior model ofNano.

The model is Bajaj RE6O.

Engine Displacement -Four-valve DTSi .

Engine Model - DTSi.

Engine Type - Petrol.


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Bajaj Pulsar 220 DTSI review :


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Bajaj Pulsar 220 DTSI review:The Pulsar 220 DTS-I bike have a Indias largest

carburettor, temperature based ignition mappingand Auto choke. To give high end speed and mileagewith air-mixed fuel to prove her power and Good start

ability & better torque.


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Bajaj Pulsar 220 DTSI review: Spark Plug used in Pulsar 220

DTS-i.

Comparison of Spark Plugtemperature with the vehiclevelocity.


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Bajaj Pulsar 220 DTSI review:

Fig: Starting of Pulsar DTS-i Bike.


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Mathematical ModelGoverning equations of the cycle model:

The energy equation in crank angle basis is written as:

+

To determine instantaneous cylinder volume, pressure ,andburned and unburned gas temperatures, the followinggoverning equations have been used:

* +

, + / , (

).--


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Mathematical ModelCombustion model:

Equations to determine the burnt mass fraction :

+

=

Where,= area of flame front= the characteristics burning time= length scale of characteristic flame= laminar flame speed= volume of combustion chamber= internal energy

= crank angle


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Advantages

Better starting of engine even incold climatic conditions.

Efficiently balances thetemperature of chambers andother parts.

Increase the Thermal Efficiencyof the Engine.

Diameter of the flame increasesrapidly.

Twin Spark plugs reduces the

soiling of plugs.


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Disadvantages

The engine tends to overheat and loosepower at higher speeds.

Requires more investment for replacing

the plugs.

The engine wear and tear is somehowincreased and hence these engines needfrequent checkup.


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StatisticsThe following are the various statistics showing theadvantages of application of DTSi & its derived technologiesi.e. the comparison of various aspects of 150 cc category and125 cc category bikes.


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So, finally Iconclude.. Perfect Combustion in Internal

Combustion engine is not possible.

DTSI system helps for instantaneous

burning of fuels.

To overcome the requirements, newpatent DTS-i is introduced.


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References

www.google.com

www.bajajauto.com

www.wikipedia.com Internal Combustion Engines

by V Ganeshan


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Presented by :

Soumen Das

3rd yr. Mechanical Engineering

Roll No. 09101007038

Sec : B1

Jalpaiguri Govt. Engg. College


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Guided by :

Dr. N. Mukhopadhyay[B.E , Ph.D., M.B.A.]


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37-soumen das_dtsi engine

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