2006-09-13 11:55:19 · 12 answers · asked by steve m 1 in Cars & Transportation ➔ Maintenance & Repairs
The diesel cycle is a 4-stroke process. Intake, Compression, Power and finally Exhaust. The piston rapidly compressing the air on Compression with both valves closed and a high compression ratio heats the air very hot for just a moment. When the diesel fuel is squirted into the cyclinder, it ignites and burns through the power stroke.
2006-09-13 12:07:03 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The diesel fuel gets "squeezed" in the combustion chamber (cylinder). Any time a gas, in this case air mixed with diesel fuel vapor, gets compressed, heat energy is created. The heat energy created ignites the diesel fuel, thus eliminating the need for a spark plug.
2006-09-13 12:05:52 · answer #2 · answered by danfrain 1 · 0⤊ 0⤋
Intake stroke: Diesel fuel is forced through a very tiny oriface by a high pressure injector pump to turn it into a highly explosive mist (when combined with O2) in the cubustion chamber.
Compression Stroke: This explosive fuel/air mix is squeezed to the point of self ingnition (which is caused by having x BTUs in volume A now present in 1/50th of volume A. When the engine is cold, the use of the glow plug provides a little extra heat to encourage ignition.
Power stroke: BAM! This mix explodes and forces the piston down (just like in a gas four stroke engine)
Exhaust stroke: Forces the exhausted fuel/air mix through the exhaust valve which is now open by means of cam timing.
2006-09-13 12:14:49 · answer #3 · answered by Anonymous · 0⤊ 0⤋
It runs on very high compression and the heat the explosion causes. Diesel motors run very high compression. By forcing the proper fuel and air mixture into that chamber and forcing it to compress it burns.It's the heat the compressed air generates that fires the fuel when its injected.
2006-09-13 12:04:14 · answer #4 · answered by uthockey32 6 · 0⤊ 0⤋
The website below will describe and show exactly how the diesel engine works. It even has a moving picture showing the four seperate actions inside the engine.
2006-09-13 12:08:07 · answer #5 · answered by .*. 6 · 0⤊ 0⤋
When a gas (of any type) is compressed, its temperature rises. In a diesel engine the air/fuel mixture is compressed enough to raise its temperature to the ignition point.
http://www.tpub.com/content/doe/h1018v1/css/h1018v1_22.htm
2006-09-13 12:02:43 · answer #6 · answered by ecmfw 4 · 0⤊ 0⤋
pressure and heat are related,the more pressure the more heat.
When you pump a bike pump and hold a finger over the outlet you will feel pressure and heat.A diesel engine works the same,it compresses air to a high pressure(and heat) then the fuel is injected in and it ignites.
2006-09-13 12:43:39 · answer #7 · answered by frank m 5 · 0⤊ 0⤋
Diesel fuel explodes when placed under compression.
2006-09-13 11:58:31 · answer #8 · answered by Common Cents Genius 2 · 0⤊ 0⤋
diesel engines have more pressure in the cylinder than a gasoline engines do. when the air in the cylinder is compacted it becomes so hot that fuel when sprayed into the cylinder it automatically ignites.
2006-09-13 12:08:23 · answer #9 · answered by Grant 2 · 0⤊ 0⤋
It works on the heat generated during compression. for a More detailed description check out the web site howstuffworks.com
2006-09-13 11:58:54 · answer #10 · answered by gary o 7 · 1⤊ 0⤋