Tdi Seminar

8/2/2019 Tdi Seminar

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SEMINAR ONTURBO DIRECT INJECTIONENGINES

BY- NAKUL SINGH

7AE-033


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DIESEL ENGINES

In 1893, a German engineer namedRudolf Diesel perfected the compression-

ignition engine that bears his name The diesel engine uses heat created by

compression to ignite the fuel, so itrequires no spark ignition system.

A lot of changes have been boughtabout in diesel engines since first enginewas invented.


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TDI

(TURBO CHARGED DIRECTINJECTION)

Developed and produced by volkswagongroup

TDI or Turbocharged Direct Injection is adesign of turbo diesel engines, whichfeature turbocharging and cylinder-direct fuelinjection

Turbocharged direct injection is innovativeengine design that delivers a combination of

1.Performance.2.Fuel economy .3. Low emission


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CONSTRUCTION

Mass air flow sensor

Turbocharger

Intercooler

Direct fuel injector

Engine control unit


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MASS AIR FLOW SENSORS

Converts the amount of air entering intothe engine into voltage signals

Located directly in between air cleanerand throttle body

ECM needs to know the amount of intakeair volume

Necessary to determine how much fuel tobe injected inside cylinder


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TURBOCHARGER

Centrifugal compressor powered by high

speed turbines, driven by engine exhaust

Improves volumetric efficiency of the engines.

The function of turbocharger is to increase the

amount of air entering the engine.

The power and the torque increases

tremendously compared to an enginewithout a turbocharger


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SCHEMATIC DIAGRAM


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INTERCOOLERS

Mechanical device used to cool fluidincluding liquid and gases

Increase efficiency of the inductionsystem by reducing air induction heat

Lowering of intake charge temperatureeliminates the danger of predetonation


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ENGINE CONTROL UNIT(ECU) Electric control unit that controls the series of actuators

of on an internal combustion engine Does this by reading values from a multitude sensors in

the engine bay Functions

Control of Air/Fuel ratioControl of idle speedControl of variable valve timing


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WORKING OF TDI

TDI engine uses a computer controlled

injection system.

Fuel is directly sprayed into the combustionchamber at very high pressure

This helps in promoting complete combustion

Fuel injector sprays atomised fuel directly into

the main combustion chamber ofeach cylinder.


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IMPROVEMENTS OVERPREVIOUS DIESEL ENGINES

More power

Less smoke

Better fuel consumption

Cold start

Turbo lag

Lower compression ratio


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ADVANTAGES

Eco conscious

Increased efficiency

Max output with minimum fuelconsumption

High torque


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DISADVANTAGES

Low rpm

High cost

Space requirement

Documents

Tdi Seminar