04-02-2016, 03:06 PM
The only difference between diesel engine and a four-stroke
gasoline engine is:
No sparkplug on Diesel engine.
Has a higher compression ratio. (14:1 to 25:1)
Better fuel mileage.
Intake Stroke
Piston moves from TDC to BDC creating vacuum in the cylinder .Intake valve opens allowing only air to enter the cylinder and exhaust valve remains closed.
Compression Stroke
Both valves stay closed
Piston moves from BDC to TDC, Compressing air to 22:1
Compressing the air to this extent increases the temperature inside the cylinder to above 1000 degree F.