Supercritial Fuel Injection System is a fuel injection system that can be used to reduce emissions and increase efficiency up to 50 - 70 % in an automobile.

1. SEMINAR ON:
SUPERCRITICAL FUEL
INJECTION SYSTEM

2. PRESENTED BY:
MELBIN K MATHEW
NO: 31
S5 MECHANICAL
GPTC KANNUR
mlbnkm1@gmail.com

3. IC ENGINES
• Developed in 1850s
• Most commonly used for
mobile propulsion in vehicles.
• Generally using fossil fuel
(mainly petroleum)
• Used around the globe

4. CURRENT SCENARIO
• 8,41,41,209 vehicles with IC
engines produced in the world
2012
• 41,45,194 in India.
• Production increased by 5.3%
last year
• Fuel cost increasing day by day.
• Increased pollution.

5. DRAWBACKS

6. AIR POLLUTION

8. THERMAL LOSSES

9. LOSSES
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Engine Losses - 62.4 %
Idling Losses - 17.2 %
Accessories - 2.2 %
Driveline Losses - 5.6 %
Aerodynamic Drag - 2.6 %
Rolling Resistance - 4.2 %
Inertia; Braking Losses - 5.8 %

10. SUPERCRITICAL FUEL
INJECTION SYSTEM
(TRANSONIC COMBUSTION)

11. SUPERCRITICAL FUEL
INJECTION SYSTEM
• Fuel is heated beyond
thermodynamic critical point.
• Heating is in the presence of a
catalyst.
• Fuel injection is using a specially
designed fuel injector.
• FUEL USED IS PETROL (GASOLINE).
• COMPRESSION IGNITION IS USED.

12. Supercritical fluid
• any substance at a temperature
and pressure above its critical
point.
• distinct liquid and gas phases
do not exist in this condition.
• small changes in pressure or
temperature result in large
changes in density

15. MAJOR PARTS
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High Pressure Fuel Pump.
Engine control unit (ECU)
Fuel conditioning module.
Heat exchanger.
Fuel rails.
Fuel Injectors.

17. HIGH PRESSURE FUEL
PUMP
• An electric fuel pump.
• Equipped with an Electronic
Control Unit (ECU).
• Increased safety.

18. ELECTRIC FUEL PUMP

19. FUEL CONDITIONING
MODULE

20. FUEL CONDITIONING
MODULE
• Fuel conditioning is an emerging
technology based on the discovery that
high powered magnets placed in a
particular pattern on fuel feed lines
cause the fuel to burn at a higher
temperature and more efficiently.

21. BENEFITS
• Carbon contribution to the
atmosphere is reduced
• Reduced fuel consumption, 6%
-15% reduction.
• Less waste hydrocarbon in
emissions means that more of
the fuel is burnt.
• A rise in flame temperature.

22. HEAT EXCHANGER

23. HEAT EXCHANGER
• A piece of equipment built for
efficient heat transfer from
one medium to another.
• Uses heat from exhaust gases to
heat the fuel.
• Tubular heat exchanger is used.

24. FUEL RAIL (COMMON RAIL)

25. FUEL RAIL (COMMON
RAIL)
• a pipe (usually resembling a rail)
used to deliver fuel to
individual fuel injectors.
• It is designed to have a pocket
or seat for each injector as
well as an inlet for a fuel
supply.

26. FUEL INJECTOR

27. FUEL INJECTOR
• When signalled by the ECU the
fuel injector opens and sprays
the pressurised supercritical
fuel into the engine.
• The duration that the injector
is open (called the pulse width)
is proportional to the amount
of fuel delivered.

28. INJECTED FUEL
NORMAL
SUPERCRITICAL

29. FUEL INJECTOR WORKING

30. ELECTRONIC CONTROL
UNIT

31. FUNCTIONS OF ECU
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Air- fuel ratio control.
Variable valve timing control.
Idle speed control.
Fuel injection.
Error detection.
Monitoring temperature and
other sensors etc.
(VIDEO)
•

33. ADVANTAGES
• About 50 % increase in
efficiency.
• Perfect combustion of fuel.
• Less pollution.

34. DISADVANTAGES
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Costly.
Need regular maintenance.
ECU can be hacked.

35. REFERENCES
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Wikimedia.
Wikipedia.
Team BHP.
United States Patents - 2011/0057049
A1.
Howstuffworks – Auto.
MIT Technology Review.
Green Autoblog.
SAE INTERNATIONAL.

36. QUESTIONS ?

37. 
THANK YOU