4 Stroke Engine
Name something required for combustion to take place in a typical 4 stroke engine.
Fuel, Air or Compression are all acceptable
How many full rotations does the crankshaft during 1 stroke?
.5
What carries coolant from the radiator?
hoses
The role of the coolant system is to
keep the engine from overheating
Could a swallow carry a coconut from the tropics to the island of Britain?
No. It's a question of weight ratio. A 5 ounce bird could not carry a 1 pound coconut.
What is the first stroke?
Intake
What is the 2nd stroke?
Compression
What cools the coolant?
radiator
Chemical characteristics of coolant consist of
Boiling Point & Freezing Point
It's a question of weight ratio really. How big is a European swallow?
5 oz
What is the 4th Stroke?
Exhaust
What is the 3rd Stroke?
Power
What circulates coolant through the system?
Water Pump
1 benefit or drawback of Undiluted coolant is
Needs to be diluted by the technician/owner, More cost efficient
How heavy is a coconut?
a pound or so probably
Explain what is happening during the first stroke
The piston is moving down creating a vacuum which pulls fuel and air into the cylinder
Explain what is happening inside the cylinder during the 2nd stroke.
The piston is moving up compressing the fuel and air mixture
What turns opens and closes the coolant system based on internal engine temperature?
thermostat
1 benefit or drawback of Diluted coolant is
Does not need to be diluted, More Expensive
What about an african swallow?
That would work. It could carry a coconut. It could grip it by the husk.
Explain what is happening inside the cylinder during the 3rd stroke.
The spark plug ignites the compressed fuel and air mixture causing and explosion that forces the piston down
Explain what is happening inside the cylinder during the 4th stroke.
The piston moves up as the exhaust valve opens forcing the exhaust out of the cylinder
What cools the radiator?
Fan
List 2 common issues that a coolant system may experience.
Leaks, Failed Thermostat, Failed Water Pump
So an African swallow could carry a coconut from the tropics to the island of Britain then right?
No. They are non-migratory.