Quizzes & Puzzles1 min ago
what causeses deisel to fire
8 Answers
What causeses deisel to fire ie petrol has a sprk plug
Answers
Best Answer
No best answer has yet been selected by Dave G. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.The pressure inside a diesel engine produces sufficient heat for the fuel mixture to instantaneously self-combust (i.e. explode). The pressure inside a petrol engine doesn't heat the fuel mixture to a sufficient temperature for combustion, so the addition of a spark to the process is required (which also means that lower pressures can be used).
More here:
http://www.articlesbase.com/automotive-article s/petrol-engines-compared-to-diesel-engines-66 8455.html
Chris
More here:
http://www.articlesbase.com/automotive-article s/petrol-engines-compared-to-diesel-engines-66 8455.html
Chris
Chris is essentially correct (as usual) except that diesel fuel (nor gasoline for that matter) doesn't "explode" in the cylinders. I realize Chris was probably using the term as an euphemism, but engineers spend millions of dollars and untold amounts of time perfecting "flame propagation" in internal combustion engines. Exploding fuel causes detonation and can severely harm an engine...
Diesel engines have a higher compression which causes the diesel to combust, hence the term compression ignition engine . Large diesel engines have a large stroke (ie piston travel) which gives high torque and low RPM, hence why HGV,plant & commercials use diesels as they require enormous amounts of power
From wikipedia
A diesel engine is an internal combustion engine which operates using the diesel cycle (named after Dr. Rudolph Diesel). Diesel engines have the highest rate of energy to fuel (kwh/lbs) compared to any internal or external combustion engine.
The defining feature of the diesel engine is the use of compression ignition to burn the fuel, which is injected into the combustion chamber during the final stage of compression. This is in contrast to a petrol (gasoline) engine, which uses the Otto cycle, in which a fuel/air mixture is ignited by a spark plug.
From wikipedia
A diesel engine is an internal combustion engine which operates using the diesel cycle (named after Dr. Rudolph Diesel). Diesel engines have the highest rate of energy to fuel (kwh/lbs) compared to any internal or external combustion engine.
The defining feature of the diesel engine is the use of compression ignition to burn the fuel, which is injected into the combustion chamber during the final stage of compression. This is in contrast to a petrol (gasoline) engine, which uses the Otto cycle, in which a fuel/air mixture is ignited by a spark plug.
Diesel engines also use the "Otto Cycle" chas.
Read the last paragraph in the fuel octane section.....
http://en.wikipedia.org/wiki/Four-stroke_engin e
Read the last paragraph in the fuel octane section.....
http://en.wikipedia.org/wiki/Four-stroke_engin e
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