TDI 2L Diesel Engine

1. VOLKSWAGEN TDI ENGINE

2. CONTENT
• Introduction & History
• History & Motor Racing
• Direct & In-direct Injection
• Forced vs Free Injection
• OHV vs OHC Engine
• 2.0 TDI
• Turbo Lag

3. INTRODUCTION
TDI (Turbocharged Direct Injection) is a marketing term used by Volkswagen
Group for its turbocharged diesel engines that have an intercooler in addition to the
turbo compressor.

4. HISTORY
• Volkswagen’s first turbocharged 5-cylinder diesel engine was used in 1978 in
Mercedes-Benz 300SD
• In 1986 Fiat Corma was the first car to come with Volkswagen’s 2.0L diesel
engine.
• Volkswagen Group's first TDI engine was introduced in the 1989 Audi 100
TDI sedan.

5. MOTOR RACING
• The first TDI engine used by Volkswagen Group for motor racing was in the Audi
R10 TDI, which competed in 24 hours of Le Mans Race and recorded a victory.
• In the nine years from 2006 to 2014, the Audi R10 and its successors (R15 and
R15) won the 24 Hours of Le Mans eight times

6. DIRECT AND INDIRECT
INJECTION
• Direct Injection
When a fuel injector sprays the diesel fuel directly into the main combustion chamber, which
therefore increases the torque output and has a 10–15% lower fuel consumption.
• In-Direct Injection
When fuel goes into a pre-combustion chamber (instead of main combustion chamber) or an air
cell to begin the process that then spreads into the main combustion.

7. FORCED VS FREE INJECTION
• Free Injection
Fuel mixture is injected into the combustion chamber at pressure equal or nearly close to
atmospheric pressure.
Those engines are known as Naturally Aspirated Engines.
• Forced Injection
Fuel mixture is injected into the combustion chamber at very high pressure by means of turbo or
superchargers to get more power and torque from engine.

8. TURBO VS SUPERCHARGER
• Turbo-Charger
Exhaust gases are used to run turbine which then rotates compressor to compress air to increase
its pressure.
• Super-Charger
The compressor is run by getting torque from engine Fly-Wheel using belt and pulley
mechanism which then compresses the air to increase its pressure.

9. SV VS OHV ENGINES
• Side Valve Engine
Intake and exhaust valve are located on the side of combustion chamber of the cylinder. Most
2-Stroke engines had this configuration.
 Insensitive to low octane fuel
 Low mechanical engine noise
 Simplicity, reliability and low cost
• Over Head Valve Engine
In such type of engines, intake and exhaust valves are fitted on the top of cylinder head.
 Higher low-end torque
 Compact size
 High power output

10. SC VS OHC ENGINE
• Side CAM Engine
In such type of engines, cams are located below the head of engine and on the side of
combustion chamber and push rods are used to operate Valves.
• Over Head CAM Engine
In these engines cams are located above the head of engine in direct contact with valve. There is
no need for using push rods in such engines.

11. TURBO LAG
• Turbo-charger needs a certain gas pressure to work, only available when
engine revs are high enough.
To avoid this, variable turbine geometry (VTG) turbocharger is used.
Low Rpm Narrow cross section area of exhaust.
High Rpm Larger cross section area of exhaust.

12. 2.0L DIESEL ENGINE
• It’s a 4-Cylinder Inclined DOHC Diesel Engine.
• It produces 180Hp @4000 RPM.
• 360 Nm of torque @2500 RPM.

13. 2.0L DIESEL ENGINE
• It’s a turbo-charged engine equipped with intercooler to cool down
compressed air.
• Consumable fuel is diesel.
• Equipped with Common-Rail (third generation direct diesel injection).
• Diesel Particulate Filter DPF are installed which are very effective in
cutting emissions, making advanced engines much cleaner than older engines.
• Equipped with VTG system to avoid turbo lag.

14. THANK YOU