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Gasoline Direct Injection GDIGDIGDI. Introduction Advantages of Fuel Injection over Carburetor Main Components of Electronic Fuel Injection Electronic.

Dec 26, 2015

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Rolf Hensley
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Page 1: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

Gasoline Direct InjectionGasoline Direct Injection

GDIGDI GDIGDI GDIGDI

Page 2: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

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

THE WAY WE PROCEED...

Page 3: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

INTRODUCTION

Transition of Fuel Supply System

Carburetor Port Injection

(MPFI)

Direct Injection

(GDI)

Page 4: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

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.

Page 5: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

MAIN COMPONENTS OF ELECTRONIC FUEL INJECTION

1. Engine Control Unit

2. Sensors

3. Fuel Injectors

Engine Control Unit (ECU)

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

ECU Engine

Exhaust

Open loop Operation mode

ECU Engine OxygenSensor

Exhaust

Closed loop Operation mode

Page 6: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

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.

Page 7: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

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.

Page 8: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

ELECTRONIC FUEL INJECTION

1. Multipoint Fuel Injection

2. Gasoline Direct Injection

Page 9: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

Have a separate fuel injector for each cylinder .

Have better cylinder to cylinder distribution.

Eliminate the need to preheat the intake manifold

MULTI POINT FUEL INJECTION SYSTEM

Page 10: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

GASOLINE DIRECT INJECTION

GASOLINE DIRECT INJECTION

Page 11: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

3.350Fuel Pressure (MPa)

Port InjectionIn-Cylinder Direct InjectionFuel System

StandardUpright StraightIntake Port

Flat top PistonCurved Top PistonCombustion Chamber

10.512.0Compression Ratio

Intake: 2, Exhaust: 2Number of Valves

IL-4Number of Cylinders

1834Displacement

81.0 x 89.0Bore x Stroke (mm)

Conventional MPFIGDIITEM

COMPARISON WITH MPFI

Page 12: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

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.

Page 13: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

MAJOR CHARACTERISTICS OF THE GDI ENGINE

Lower fuel consumption and higher output

• Ultra-lean Combustion Mode• Superior Output Mode

Page 14: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

In-cylinder Airflow

Fuel Spray

Optimized Configuration of the Combustion Chamber

Click H

ereC

lick Here

Click H

ere

Page 15: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

REALIZATION OF LOWER FUEL CONSUMPTION

Basic Concept

Combustion of Ultra-lean Mixture

Click H

ere

Page 16: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

Vehicle Fuel Consumption

Fuel Consumption During Idling

Fuel Consumption during Cruising Drive

Page 17: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

Emission Control

Page 18: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

REALIZATION OF SUPERIOR OUTPUT

Improved Volumetric Efficiency

Increased Compression Ratio

Page 19: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

ACHIEVEMENTS Engine performance

Vehicle Acceleration

Page 20: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.

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

Page 21: Gasoline Direct Injection GDIGDIGDI.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic.