Fuel Injection System: How Mico Fuel Injection System Work in C.I.Engine

(Last Updated On: 02/08/2018)

Fuel injection system is used to inject the fuel in a combustion chamber of an internal combustion engine.

All diesel engines used fuel injection system but in a petrol engine, it is replaced by the carburettor.

Various types of fuel injection system can be used in automobile engineering.

Some of them are continuous injection, direct injection, single point injection, and multi-point injection etc.

Out of these fuel injection systems, Mico fuel Injection System is widely used in automotive engines.

Hence here I will cover details about Mico Fuel Injection System used for Multi-Cylinder Diesel Engines.

So, Here is the details about Fuel Injection System Working

fuel injection system

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The fuel injection system consists of a Fuel Feed Pump and a Fuel Injection Pump. These parts are integrated into one body. The Fuel Feed Pump sucks the Fuel Oil from the fuel tank.

This still contains Air bubbles and Vapor, then the Pump supply oil to filter unit for purifying it.

The filter unit cleans the oil and further supplies it to the Fuel Injection Pump. Overflowed oil is sent back to Fuel Tank through overflow valve provided on the filter unit.

Air vent screw is also provided by the Filter Unit for Air Venting.

The injection Pump has the main Crankshaft which is driven by power supplied by the Engine.

The number of Plunger quantity is equal to a number of Cylinder Engine.

One Plunger supplies the fuel to one cylinder of engine only, and each Plunger works as an individual Injection Pump.

fuel injection system

Only Control Rod meshes with all the toothed quadrants of all the Pumps at the same time.

The Fuel which is coming from Filter unit is compressed to the required pressure by these Plungers.

Then after it is supplied through a delivery pipe to the injector of the Engine at proper timing.

Separate overflow outlets are provided on each plunger to send back overflowed oil to Fuel Tank.

A Governor is also provided at the Injection Pump.

This actuates the control rod to govern the supply of oil through plunger according to the demand of the Engine.

I hope above information on fuel injection system working will help you to know the topic.

Besides this information, you are suggested to read something more from below engineering books

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