GGS COLLEGE OF MODERN TECHNOLOGY,KHARAR

Prepared by-Prince Kumar

14098465th Sem(ME)

MPFi (Petrol), Diesel fuel system

Introduction To Supply a proper Ratio of Gasoline and Air to

Cylinder.Without usage of Carburetor to mixing the Fuel

and air In SI Engine.Varied the Piston speed using Advanced sensors

(ECU).

Classification of MPFIBy the Placing of the injector it is further classified into

two types.I. Port Injection system .II. Throttle Injection system

Port Type systemThe Injector is Placed in the Intake Manifold near the intake

Port .The Injector Sprays Gasoline into the Air inside the manifold

.Fuel & Air mix in Uniform manner And this mixture Entered

into Cylinder .

Throttle Injection systemThis is similar to carburetor Body with throttle valve

controlling the amount of Air entering intake manifold .

The sensor is used to control the fuel mixing level.

Type Of Injection System

Sketch of MPFI

Engine Control Unit (ECU)In General ECU in turn is controlled by the Data

Input From the set of sensors Located all over the engine & its Auxiliaries.

ECU primarily controls Ignition Timing & Quality of Fuel to be injected.

ECU gives various commands to the Engine Fuel intake system & Spark ignition system , To deliver an Over all Satisfactory Performance of the engine From start to Shut down including Emission Control .

Advantages of MPFII. Without using of carburetor the product cost is Low.II. Engine Efficiency is High. III. Low Maintenance.IV. High Power to Engine.V. No extra Heating While Warm up. Etc,.

Disadvantage Of MPFI

1. Hood Height of the Car is High.2. Manifold Heat control System OR Valve is

Required.3. Intake Manifold control only air not Fuel .

Diesel fuel

Use of Diesel FuelIn Mobile Applications

Trucks Locomotives And now passenger cars Ships

Stationary Applications Power generation Pump sets in agriculture

Properties of diesel fuelIt is found that Specific gravity, flash point, viscosity, sulfur content, and

carbon residue increase with increase in service severity. The cetane number (which measures the fuel’s ignition

quality) decreases with increase in service severity. There is also a decrease in volatility with increase in service severity.

Properties are, however, inter-related and it is difficult to isolate the effect of any single variable

Advantages and Disadvantages of diesel fuelAdvantages DisadvantagesDiesel cars offer better

mileage. Diesel is an efficient and

energy dense fuelDiesel vehicles don’t need

ignition tune-ups Diesel engines are designed to

withstand the challenge of higher compression.

Diesel costs just as much as gasoline.

Diesel doesn’t offer high-speed performance.

Diesel cars need regular maintenance

Diesels may cost more when maintenance is neglected

Thank You!