GDCi Engine(Gasoline Direct Compression Ignition )

YAGNA V12LE6ME095

INTRODUCTIONWhat is GDCi engine?

Who developed it?

Why it is important?

BACKGROUND Diesel engine higher efficiency

with higher PM, NOx.Petrol engine lower efficiency

with lower NOx and PM.HCCI engine other practical

problems.

HISTORYThe concept was started in 2010

Delphi along with its partner Hyundai.

Prototype

Fig 1.0 Single cylinder test engine

Experiment targets

(Combustion Noise Level)

Prototype of 4c engine(2013)

Specification of 4C engine

ProcessIntake strokeCompression strokePower strokeExaust stroke

Process

GDCi

Intake

Compression

Power

Exhaust

Combustion chamber concept

Systems and fuel usedNew piston designVariable load valve train system

for exhaust rebreathingTurbo charger and super chargerNew way of cooling Fuel used was Shell unleaded

with octane number 91.

Results BSFC of 210g/kWh. NOx level under 0.2 g/kWhPM less than 0.1 FSNCOV-IMEP less than 2%Combustion efficiency was in

between 92-97%

Comparison

ConclusionThe next generation engine may

be of either GDCI engine or HCCI engine. The main aim of getting this type of engine is to have the emission as minimum as possible with minimum BSFC.

References“History of gasoline direct compression

ignition (gdci) engine- a review ”- IJRET: International Journal of Research in Engineering and Technology- Meisam Ahmadi Ghadikolaei

“GDCI Multi-Cylinder Engine for High Fuel Efficiency and Low Emissions ” – SAE international - Mark Sellnau, Wayne Moore, James Sinnamon, Kevin Hoyer, Matthew Foster, and Harry Husted (Delphi Powertrain)

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