C1. Introduction to MPI and GDI

 Introduction Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  Electronic Fuel Injection  Multi Point Fuel Injection  Gasoline Direct Inj

Gasoline Direct InjectionGDI GDI GDI

 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

Transition of Fuel Supply System

Carburetor Port Injection

(MPFI)

Direct Injection

(GDI)

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

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

Exhaust

Open loop Operation mode

Sensor

Exhaust

Closed loop Operation mode

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

of input sensors

It is controlled by the ECU

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

ELECTRONIC FUEL INJECTION

1 Multipoint Fuel Injection

2 Gasoline Direct Injection

 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

GASOLINE DIRECT

INJECTION

GASOLINE DIRECT

INJECTION

3.3 50

Fuel Pressure (MPa)

Port Injection In-Cylinder Direct Injection

Fuel System

Standard Upright Straight

Compression Ratio



Intake: 2, Exhaust: 2 Number of Valves



IL-4 Number of Cylinders



1834 Displacement



81.0 x 89.0 Bore x Stroke (mm)

Conventional MPFI GDI

ITEM

COMPARISON WITH MPFI

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

MAJOR CHARACTERISTICS OF THE GDI ENGINE

 Lower fuel consumption and higher output

• Ultra-lean Combustion Mode

• Superior Output Mode

REALIZATION OF LOWER FUEL CONSUMPTION

Vehicle Fuel Consumption

 Fuel Consumption During Idling

 Fuel Consumption during Cruising Drive

 Emission Control

REALIZATION OF SUPERIOR OUTPUT

 Improved Volumetric Efficiency

Increased Compression Ratio

ACHIEVEMENTS

 Engine performance

Vehicle Acceleration

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

THA NK Y

OU