Multi Point Fuel Injection System
MULTI –POINT FUEL INJECTION
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Contents
Chapters Page No.
Introduction 3
Objectives 5
History and Development 6
Supersession of carburetor 10
Basic function 13
Fundamentals of fuel injection 15
Various injection system 18
Conclusion 22
Reference 23
Introduction
I was commuting with my friends back from college one evening when one of them asked me: What is an MPFI Engine?
You must have seen cars with specifications which mention words like MPFI and CRDI or CRDE. To an automotive engineer or enthusiast, it means something, but for a common man, it may not make much sense.
MPFI means – Multi-point Fuel-Injection (also called fuel-injection system)
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The term MPFI is used to specify a technology used in Gasoline/petrol Engines. For Diesel Engines, there is a similar technology called CRDI. MPFI System is a system which uses a small computer to control the Car’s Engine. A Petrol car’s engine usually has three or more cylinders or fuel burning zones. So in case of an MPFI engine, there is one fuel –injector installed near each cylinder, that is why they call it Multi-point (more than one points) Fuel Injection.
In plain words, to burn petrol in an Engine to produce power, Petrol has to be mixed with some air, ignited in a cylinder (also called combustion chamber), which produces energy and runs the engine.
Before MPFI system was discovered, there was a technology called “Carburetor”. Carburetor was one chamber where petrol and air was mixed in a fixed ratio and then sent to cylinders to burn it to produce power. This system is purely a mechanical machine with little or no intelligence. It was not very efficient in burning petrol; it will burn more petrol than needed at times and will produce more pollution. But with the advancement of technology this was about to change.
Based on various inputs from the sensors, the
[pic]
Contents
Chapters Page No.
Introduction 3
Objectives 5
History and Development 6
Supersession of carburetor 10
Basic function 13
Fundamentals of fuel injection 15
Various injection system 18
Conclusion 22
Reference 23
Introduction
I was commuting with my friends back from college one evening when one of them asked me: What is an MPFI Engine?
You must have seen cars with specifications which mention words like MPFI and CRDI or CRDE. To an automotive engineer or enthusiast, it means something, but for a common man, it may not make much sense.
MPFI means – Multi-point Fuel-Injection (also called fuel-injection system)
[pic]
The term MPFI is used to specify a technology used in Gasoline/petrol Engines. For Diesel Engines, there is a similar technology called CRDI. MPFI System is a system which uses a small computer to control the Car’s Engine. A Petrol car’s engine usually has three or more cylinders or fuel burning zones. So in case of an MPFI engine, there is one fuel –injector installed near each cylinder, that is why they call it Multi-point (more than one points) Fuel Injection.
In plain words, to burn petrol in an Engine to produce power, Petrol has to be mixed with some air, ignited in a cylinder (also called combustion chamber), which produces energy and runs the engine.
Before MPFI system was discovered, there was a technology called “Carburetor”. Carburetor was one chamber where petrol and air was mixed in a fixed ratio and then sent to cylinders to burn it to produce power. This system is purely a mechanical machine with little or no intelligence. It was not very efficient in burning petrol; it will burn more petrol than needed at times and will produce more pollution. But with the advancement of technology this was about to change.
Based on various inputs from the sensors, the
References: • www.carblogindia.com • www.indiacar.com • www.wikipedia.org • www.crazyengineers.com • www.ehow.com • www.google.com (for images) • Internal Combustion Engines(III edition) by V Ganeshan [pic][pic][pic]