multi point fuel injection system-gourav

of 21 /21
MULTI POINT FUEL INJECTION SYSTEM BY: GOURAV GUPTA ROLL NO. 12 ENROLLMENT NO. 71/09 1

Upload: priyanshu-goel

Post on 08-Nov-2014

85 views

Category:

Documents


4 download

Embed Size (px)

TRANSCRIPT

Page 1: Multi Point Fuel Injection System-gourav

MULTI POINT FUEL INJECTION

SYSTEM

BY:GOURAV GUPTAROLL NO. 12ENROLLMENT NO. 71/09

1

Page 2: Multi Point Fuel Injection System-gourav

INTRODUCTION

MPFI- a technology used in petrol engines

Uses a small computer to control the car’s engine

In MPFI engine one fuel –injector is installed near each cylinder ,that is why it is called multi point fuel injection.

Before MPFI system, there was a technology called “Carburetor”

2

Page 3: Multi Point Fuel Injection System-gourav

The computer in the MPFI system decides what amount of fuel to inject

System also learns from the drivers driving habits

MPFI system makes engine fuel efficient

3

Page 4: Multi Point Fuel Injection System-gourav

OBJECTIVES

power output fuel efficiency emissions performance reliability drivability and smooth operation initial cost maintenance cost range of environmental operation

4

Page 5: Multi Point Fuel Injection System-gourav

SUPPERSESSION OF CARBURETORS

Extensive carburetor modifications and complexities were needed to approach stoichiometric engine operation

3 primary types of toxic emissions from an IC engine: CO, unburnt HC, and NOx

5

Page 6: Multi Point Fuel Injection System-gourav

Fuel injection systems have significantly evolved since mid 1980s.

Current systems provide an accurate, reliable and cost-effective method of metering fuel and with clean exhaust emissions-replaced carburetors in the marketplace

The carburetor remains in use in developing countries

6

Page 7: Multi Point Fuel Injection System-gourav

COMPONENTS OF MPFI SYSTEM

Air intake system Fuel delivery system Electronic control system

7

Page 8: Multi Point Fuel Injection System-gourav

AIR INTAKE SYSTEM

Throttle Body –

consist of throttle valve, T P sensor, which detect the throttle valve opening.

Ideal Air Control Valve – supplies bypass air depending on the engine condition.

8

Page 9: Multi Point Fuel Injection System-gourav

FUEL DELIVERY SYSTEM

Fuel Pump – consists of armature, magnet, impeller, brush,

check valve etc.

Pressure Regulator System – keeps the fuel pressure applied to the injector

higher than intake manifold at all times.

9

Page 10: Multi Point Fuel Injection System-gourav

Fuel Injector – injects fuel into the intake port of the cylinder head according to the signal from ECM

10

Page 11: Multi Point Fuel Injection System-gourav

ELECTRONIC CONTROL SYSTEM

Electronic Control Module –controls various devices according to the signals from the sensors.

Fuel Injection Control System –supplies the combustion chambers with air/fuel mixture of optimized ratio under widely varying driving conditions.

Fuel Pump Control System –ECM controls ON/OFF operation of the fuel pump

11

Page 12: Multi Point Fuel Injection System-gourav

Ignition Control System –system controls electronically the time of electric current flow to ignition primary coil as well as ignition timing.

Radiator Fan Control System –controls operation (ON/OFF) of the radiator fan motor

12

Page 13: Multi Point Fuel Injection System-gourav

Exhaust air or oxygen sensor Engine coolant temperature sensor Inlet air temperature sensor Air flow sensor Throttle position sensor Manifold pressure sensor Camshaft position sensor Crankshaft position sensor

SENSORS USED IN MPFI SYSTEM

13

Page 14: Multi Point Fuel Injection System-gourav

VARIOUS INJECTION SCHEMES

MPFIsystem

Port injection

Throttle Body

injection

L-MPFI System

D-MPFI System

14

Page 15: Multi Point Fuel Injection System-gourav

Port Injection

The injector is placed on the side of the intake manifold near the intake port

Every cylinder is provided with an injector in its intake manifold

15

Page 16: Multi Point Fuel Injection System-gourav

Throttle Body Injection System

16

Page 17: Multi Point Fuel Injection System-gourav

D-MPFI System

17

Page 18: Multi Point Fuel Injection System-gourav

L-MPFI System

18

Page 19: Multi Point Fuel Injection System-gourav

CONCLUSION

Improved fuel consumption

Better for the environment

Better performance

19

Page 20: Multi Point Fuel Injection System-gourav

References

www.howstuffworks.comwww.indiacar.comwww.carblogindia.comwww.indiacar.comwww.wikipedia.orgwww.crazyengineers.comwww.ehow.comwww.google.com (for images)

20

Page 21: Multi Point Fuel Injection System-gourav

21