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HOW A DIESEL ENGINE WORKS
Title: How a diesel engine works
Duration: 1:57 minutes
Shell This 2 minute video provides a high-level explanation of how diesel engine combustion principles work to power your vehicle compared to conventional gasoline engines. Welcome to Shell’s official YouTube channel. Subscribe here to learn about the future of energy, see our new technology and innovation in action or watch highlights from our major projects around the world. Here you’ll also find videos on jobs and careers, motorsports, the Shell Eco-marathon as well as new products like Shell V-Power. If you have any thoughts or questions, please comment, like or share. Together we can #makethefuture
How a diesel engine works ENGLISH hd Transcript
In diesel engines the operating cycle starts
with clean air being drawn into the cylinder,
not a fuel - air mixture as in a conventional gasoline engine.
The motion of the piston compresses the air,
heating it to a high temperature.
When the piston nears the top of the cylinder,
fuel is injected under high-pressure
through a number of precisely machined holes
in the tip of the fuel injector.
The fuel enters the engine in the form of a fine spray
and the surface of each droplet quickly begins to vaporize
on its path through the hot air.
Spontaneous ignition takes place
without the need for a spark
and rapid expansion of the combusting mixture
increases the pressure in the cylinder,
forcing the piston down and powering the vehicle.
When the piston is close to its lowest position,
the exhaust valve starts to open and the exhaust stroke
then drives the spent gases out of the combustion chamber
and the cycle starts again.
In conventional gasoline engines, a mixture of fuel AND air
is drawn into the cylinder, compressed by the motion of the piston
and ignited by a spark as the piston nears the top of the cylinder.
The resulting combustion generates pressure
which forces the piston down to power the vehicle.