Engine Block

Question 1

What does the engine block do?

Answer 1

• makes up the main structure of the engine
• an attachment point for the auxiliary components
• holds all the major internal components
• usually one piece but can be joined together in some modular designs
• has the cylinders bored into it, sometimes directly into the parent metal
• often incorporating sleeve or liners of which there are two types dry or wet
• made out of cast iron

Question 2

What is is a turbocharger?

Answer 2

• a type of compressor (air)
• made up of an impeller/ compressor wheel, a turbine and two housings
• they are linked by a common shaft
• compressor housing is usually made from aluminium and turbine housing from cast iron

Question 3

How does the turbocharger work?

Answer 3

• it works by taking wasted heat from the combustion process,that would normally be expelled straight out the exhaust and using it
• to drive the turbine, the movement of and expansion of these gases is what drives it
• the turbine is attached via a shaft to the compressor wheel, which then turns at the same rate, drawing in clean air from the filters
• the rotating motion thought the blade and housing design increase the air density
• which then increases volumetric efficiency
• allowing more fuel to be burnt, resulting in higher power output

Question 4

What does the radiator do?

Answer 4

• used for heat transfer, to cool the coolant

Question 5

What does ATAAC stand for?

Answer 5

Air to air after cooler

Question 6

What does WTAAC stand for?

Answer 6

Water to air after cooler

Question 7

What is an after cooler? And what it does?

Answer 7

• A type of heat exchanger and is aether air to air or water to air
  -it works by cooling the compressed air from the turbocharger
• which further increases its density and allowing for even more power gains