Inside Knowledge About Diesel Engines

Written by Thomas Yoon

One ofrepparttar most reliable internal combustion engines around isrepparttar 102783 diesel engine. In many industrial installations, diesel engines are used as prime movers forrepparttar 102784 generation of electricity and for emergency air compressors.

It's true that they are rugged, but one ofrepparttar 102785 most important advantages of these engines isrepparttar 102786 fact that they can be started by manual cranking. In remote areas, diesel engines can be counted upon for starting up from scratch.

Once a small diesel engine is started, it can be used to drive a small electrical generator that can then be used to produce electrical supply for driving other machines like pumps, compressors, and for lighting.

How does a diesel engine work?

First there must be combustion of fuel. As we have discussed in our previous articles, combustion or burning of fuel occurs whenever there is sufficient heat, fuel and oxygen. When conditions are just right, combustion can be very rapid. Rapid combustion causes an explosion in an enclosed area. This is because ofrepparttar 102787 rapid built-up of hot gases duringrepparttar 102788 process.

In an internal combustion engine like a diesel engine, this rapid combustion, and built-up of hot gas pressure is used to push a piston away fromrepparttar 102789 enclosed combustion space.

The piston is attached to a crankshaft through a connecting rod. Because of this,repparttar 102790 engine is able to convertrepparttar 102791 linear movement of a piston to a rotating movement of a crankshaft.

The outward movement ofrepparttar 102792 piston turnsrepparttar 102793 crankshaft. However, repparttar 102794 momentum ofrepparttar 102795 turning crankshaft forcesrepparttar 102796 piston back again towardsrepparttar 102797 engine combustion space in a reciprocating movement.

Bigger Power with Two Strokes!

Written by Thomas Yoon

What is a 2-stroke diesel engine?

Asrepparttar name suggests, these engines work on reciprocating actions of pistons. One stroke means one linear motion ofrepparttar 102782 piston in one direction. Whenrepparttar 102783 piston moves inrepparttar 102784 opposite direction, that is counted as another stroke.

For a 2-stroke engine,repparttar 102785 piston has to move up, and then down to complete one cycle ofrepparttar 102786 engine. In those 2 strokes ofrepparttar 102787 piston,repparttar 102788 crankshaft will have turned 1 revolution.

The 2 strokes ofrepparttar 102789 piston is to complete 4 stages ofrepparttar 102790 combustion cycle - air intake, compression, combustion and exhaust. As you might have known, in order for a fire (or explosion) to occur to powerrepparttar 102791 engine, we need a fuel, a heat source, and oxygen coming together atrepparttar 102792 same time.

Remember howrepparttar 102793 crankshaft andrepparttar 102794 piston moves in a cylinder? The reciprocating movement ofrepparttar 102795 piston is converted to rotary motion by means of a crankshaft. The piston reciprocates between Top Dead Center and Bottom Dead Center insiderepparttar 102796 cylinder liner.

One ofrepparttar 102797 most prominent feature of a 2-stroke engine isrepparttar 102798 presence of air intake ports onrepparttar 102799 cylinder liner that will enable fresh air to be led in for combustion.

These air inlet ports are cut intorepparttar 102800 cylinder liner somewhere atrepparttar 102801 lower end ofrepparttar 102802 latter. In a typical design,repparttar 102803 air inlet port are located about 35 degrees fromrepparttar 102804 Bottom Dead Center (BDC).

In many designs,repparttar 102805 fresh air that is introduced intorepparttar 102806 cylinder is also used to drive outrepparttar 102807 spent exhaust gases inside it. Many designs make use of scavenging air fans like electric blowers or turbochargers to slightly pressurizerepparttar 102808 intake air beforerepparttar 102809 latter is introduced intorepparttar 102810 cylinder.

In order to allowrepparttar 102811 exhaust gases to be expelled fromrepparttar 102812 cylinder, exhaust ports are often cut intorepparttar 102813 cylinder just likerepparttar 102814 air intake ports. A typical design will haverepparttar 102815 exhaust port located about 50 degrees from Bottom Dead Center.

Cont'd on page 2 ==> © 2005
Terms of Use