Department of Mechanical EngineeringPimpri Chinchwad College of Engineering

Performance and Emission Analysis of DTS-I Engine

Presented By :

SAGAR DHUMAL

(TEME B)

Guided By :

Mr. S. S. MORE

WHAT IS DTS-I TECHNOLOGY ?

Combustion with and without using DTS-I Technology

Advancement in DTSI Technology

• Digital Twin Spark – Swirl Induction (DTS - SI)• Digital Twin Spark – Fuel Injection (DTS - FI)• Digital Triple Spark Ignition (DTSI)• Intelligent CDI• TRICS III (3RD GENERATION)• Advancement in Bike Cooling System• ExhausTEC

Digital Twin Spark – Swirl Induction (DTS - SI)

• The Swirl Induction concept, which is meant for producing higher turbulence in the combustion chamber.

• This can be done by making slight modifications in the ports positioning of engine.

DTS-I Triple Spark Engine

• Engine has 3 spark plugs in the combustion chamber. the primary plug is at centre at an angle and other two secondary plugs are mounted below, each opposite to each other.

• The secondary plugs fires a bit after the primary one has fired and the timings are controlled by the ECU depending on throttle position, engine rev, load on engine.

Digital Twin Spark-Fuel Injection (DTS-FI)

• In fuel injection the conventional carburettor

has been replaced by injector which injects fuel in to the engine in a spray form based on the instructions of the Engine Control Unit (ECU) .

• ECU processes information sent by various sensors and instantly determines optimum fuelling and spark timing for various engine operating conditions.

Intelligent CDI (Capacitor Discharge Ignition)

• It contains a microprocessor, which continuously senses different speeds and load on engine and responds by altering ignition timing.

• Working together with the TRICSIII system, the microprocessor’s memory provides optimum ignition timings for any given engine rpm.

TRICS III (3RD GENERATION)

• TRICS III stand for Throttle Response Ignition Control System III Generation.• Depending on the needs of the rider whether it be cruising, acceleration or max speed, the

ignition requirements constantly change.• Based on a particular amount of throttle opening, the magnetic field generated by the

magnet opens or closes the reed switch. The reed switch is connected to the Digital C.D.I., which signals the C.D.I. to change / switch, the desired ignition advance timing maps.

Advancement in Bike Cooling System

• Bajaj Pulsar 200 NS has liquid cooled engine

• Heart of this system is radiator and blood of the system is the coolant or liquid which circulates through the channels made just outside of the cylinder wall to absorb the heat and comes back to radiator to cool down.

• Motul Moto Cool expert or Castrol Radicool is used is coolant.

ExhausTEC

• ExhausTEC is a device incorporated in the exhaust system.

• TEC stands for ‘Torque Expansion Chamber’. It is a tuned box (resonator) fitted onto the header pipe of the exhaust.

• In the lower rpm zones, the ExhausTEC helps to build a negative pressure pulse (vacuum) at the exhaust valve, thereby sucking in more air-fuel mixture into the cylinder during intake valve opening

“Performance and emission Analysis of DTS-I

Engine and single Spark engine

1. Brake thermal efficiency v/s load 2. Brake specific fuel consumption v/s load 3. Volumetric Efficiency v/s Load 4. Detonation5. Unburnt Hydrocarbon emission vs load6. Co Emission v/s load7. NOx Emission v/s load

Experimental Setup

Maker’s name Hero MotoCorp Bajaj auto limited Bajaj auto limited

Model type Hunk pulsar 150 DTS-I Pulsar 200 NS

Type of engine Four stroke single cylinder, air cooled engine

Four stroke single cylinder, air cooled engine

Four stroke single cylinder, water cooled engine

Displacement volume

149.2 cc 149.01 cc 199.5 cc

Compression ratio

9.1:1 9.5:1 11:01

Maximum power

13.1 Ps @8500 rpm 13.2 Ps @8500 rpm 23.5 Ps@9500 rpm

Maximum torque

12.80 Nm@6500 rpm 11.25 Nm@6500 rpm 18.3 Nm@8000 rpm

Ignition system CCVI I-CDI system I-CDI system

Brake Specific Fuel Consumption V/S Load

• It is maximum for single spark engine and minimum for the triple spark engine.

Volumetric Efficiency V/S Load

• Initially volumetric efficiency is maximum for single spark engine and minimum for triple spark engine.

• In all the cases it increases with the increase in the load.

Unburnt Hydrocarbon Emmision Vs Load

• UBHC emissions are higher in single spark engine because of incomplete combustion.

• Triple spark engines have lesser and better UBHC emission due to better and faster completion of combustion.

Co Emission V/S Load

• CO emissions are highest for the

single spark engine due to incomplete combustion.

• It is least for the triple spark engine. • CO emissions decrease with load in all

three conditions because at high temperature CO gets oxidized.

NOx Emission v/s Load

• NOx emissions are higher for twin and triple Plug engine at initial conditions.

• Curve of triple plug engine tends to approach minimum value due to liquid cooling.

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……    

Other Vehicle Manufacturer's That uses Twin spark Technology

TVS Motors (CC-VTI)

Royal Enfield

Honda (i-DSI)

Alfa Romeo

Advantages and Disadvantages

CONCLUSION….

THANK YOU