Tuesday, July 7, 2015

What is the difference between a Petrol and Diesel Engine? - Just a reminder

Just a reminder to self:

"What is the difference between a Petrol and Diesel Engine?

Petrol engine:

  • In petrol engines fuel is mixed with air
  • then forced into the cylinders
  • where the fuel-air mix is compressed by the pistons
  • and ignited by spark plugs.
Diesel engine:
  • In a diesel engine the air is compressed before the fuel is added to it.
  • When air is compressed it heats up. This means that when the fuel is added to the compressed air it is very hot and the fuel-air mix ignites automatically. (So there are no spark plugs in a diesel engine as pressure is used to ignite the fuel-air mix.")
source




Brilliant animated demonstration of the working of a diesel engine on Thomas Schwenke online channel


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