ENGINE

ENGINE

“An engine is a device designed to convert one form of energy into mechanical energy.”

Heat engines, including internal combustion engines and external combustion engines (such as steam engines) burn a fuel to create heat, which then creates a force.

CLASSIFICATION

1. On the basis combustion chamber position

       •INTERNAL COMBUSTION CHAMBER

•EXTERNAL COMBUSTION CHAMBER

INTERNAL COMBUSTION ENGINE

It is a heat engine that converts chemical energy of a fuel into mechanical work, in this type of engine the fuel is ignited inside the cylinder and power is produced.

EXTERNAL COMBUSTION ENGINE

This is also a Heat Engine but in this type of engine the fuel burns outside the Engine. Steam Engine is a type of External combustion Engine which uses steam as its fuel

2. On the basis of piston movement 

        •Reciprocating Engine

•Rotary Engine

RECIPROCATING ENGINE

Engine has one or more cylinders in which pistons reciprocate back and forth. Power is delivered to a rotating output crankshaft by mechanical linkage with the pistons.

ROTARY ENGINE

Engine is made of a block (stator) built around a large non-concentric rotor and crankshaft. The combustion chambers are built into the non-rotating block.

 3. On the basis of ignition process

        •SI Engine

•CI Engine

SPARK IGNITION ENGINE

An SI engine starts the combustion process in each cycle by use of a spark plug.

COMPRESSION IGNITION ENGINE

The combustion process in a CI engine starts when the air-fuel mixture self-ignites due to high temperature in the combustion chamber caused by high compression

4. On the basis of stroke

        •2 Stroke Engine

•4 Stroke Engine

2 STROKE ENGINE

A two-stroke cycle has two piston movements over one revolution for each cycle.

Compression Stroke

Expansion Stroke

4 STROKE ENGINE

A four-stroke cycle experiences four piston movements over two engine revolutions for each cycle.

Intake stroke or Induction

Compression

Expansion stroke or Power Stroke

Exhaust Stroke