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GDI. GDI. GDI. Gasoline Direct Injection. THE WAY WE PROCEED. Introduction Advantages of Fuel Injection over Carburetor Main Components of Electronic Fuel Injection Electronic Fuel Injection Multi Point Fuel Injection Gasoline Direct Injection

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Gasoline Direct Injection

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Gasoline direct injection

GDI

GDI

GDI

Gasoline Direct Injection


Gasoline direct injection

THE WAY WE PROCEED...

  • Introduction

  • Advantages of Fuel Injection over Carburetor

  • Main Components of Electronic Fuel Injection

  • Electronic Fuel Injection

  • Multi Point Fuel Injection

  • Gasoline Direct Injection

  • The Difference Between New GDI And Current MPI

  • Technical features

  • Major characteristics of the GDI engine

  • Realization of lower fuel consumption

  • Vehicle Fuel Consumption

  • Realization of Superior Output

  • Achievements

  • Conclusion


Introduction

Port Injection

(MPFI)

Direct Injection

(GDI)

Carburetor

Transition of Fuel Supply System

INTRODUCTION


Gasoline direct injection

ADVANTAGES OF FUEL INJECTION OVER CARBURETOR

  • Fuel injection has no choke, but sprays atomized fuel directly into the engine.

  • Electronic fuel injection also integrates more easily with computerized engine control systems.

  • Multi port fuel injection delivers a more evenly distributed mixture of air and fuel to each of the engine's cylinders.

  • Sequential fuel injection improves power and reduces emissions.


Gasoline direct injection

Oxygen

Sensor

ECU

Engine

Exhaust

Closed loop Operation mode

ECU

Engine

Exhaust

Open loop Operation mode

MAIN COMPONENTS OF ELECTRONIC FUEL INJECTION

  • Engine Control Unit

  • Sensors

  • 3. Fuel Injectors

Engine Control Unit (ECU)

  • ECU is a computer that controls all of the electronic components on the engine.


Gasoline direct injection

Sensors

  • In order to provide the correct amount of fuel for every operating condition, the ECU has to monitor a huge number of input sensors.


Gasoline direct injection

Fuel Injectors

  • A fuel injector is nothing but an electronically controlled valve.

  • When the injector is energized, an electromagnet moves a plunger that opens the valve, allowing the pressurized fuel to squirt out through a tiny nozzle.

  • It is controlled by the ECU.

  • A pipe called the fuel rail supplies pressurized fuel to all of the injectors.


Electronic fuel injection

  • Multipoint Fuel Injection

  • Gasoline Direct Injection

ELECTRONIC FUEL INJECTION


Gasoline direct injection

MULTI POINT FUEL INJECTION SYSTEM

  • Have a separate fuel injector for each cylinder .

  • Have better cylinder to cylinder distribution.

  • Eliminate the need to preheat the intake manifold


Gasoline direct injection

GASOLINE DIRECT INJECTION


Gasoline direct injection

ITEM

GDI

Conventional MPFI

Bore x Stroke (mm)

81.0 x 89.0

Displacement

1834

Number of Cylinders

IL-4

Number of Valves

Intake: 2, Exhaust: 2

Compression Ratio

12.0

10.5

Combustion Chamber

Curved Top Piston

Flat top Piston

Intake Port

Upright Straight

Standard

Fuel System

In-Cylinder Direct Injection

Port Injection

Fuel Pressure (MPa)

50

3.3

COMPARISON WITH MPFI


Gasoline direct injection

BASIC TECHNICAL FEATURES OF GDI ENGINE

  • The Upright Straight Intake Port.

  • The Curved-top Piston.

  • The High Pressure Fuel Pump.

  • The High Pressure Swirl Injector.


Gasoline direct injection

MAJOR CHARACTERISTICS OF THE GDI ENGINE

  • Lower fuel consumption and higher output

  • Ultra-lean Combustion Mode

  • Superior Output Mode


Gasoline direct injection

  • In-cylinder Airflow

Click Here

  • Fuel Spray

Click Here

Click Here

  • Optimized Configuration of the Combustion Chamber


Gasoline direct injection

REALIZATION OF LOWER FUEL CONSUMPTION

  • Basic Concept

Click Here

  • Combustion of Ultra-lean Mixture


Gasoline direct injection

Vehicle Fuel Consumption

  • Fuel Consumption During Idling

  • Fuel Consumption during Cruising Drive


Gasoline direct injection

  • Emission Control


Gasoline direct injection

REALIZATION OF SUPERIOR OUTPUT

  • Improved Volumetric Efficiency

  • Increased Compression Ratio


Gasoline direct injection

ACHIEVEMENTS

  • Engine performance

  • Vehicle Acceleration


Gasoline direct injection

CONCLUSION

  • Frequent operation in stratified mode.

  • Reduction of CO2 production by nearly 20 percent.

  • Provides improved torque 5-10%

  • Fulfills future emissions requirements.

  • 97% NOx reduction is achieved.

  • Improve the brake specific fuel consumption.

  • Smooth transition between operation modes.

  • Reduced fuel consumption 15-20%

  • Up to 5% more power

  • Spontaneous response behavior


Gasoline direct injection

THANK YOU


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