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Engine components


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valve
allows air/fuel mixture to enter and exhaust gasses to exit
spark plug
(petrol only) ignites fuel with a HV spark
compression
(diesel only) when the fuel ignites with extreme compression pressure
air/fuel mixture ratio
show how many drops of fuel to amount of air drawn in
lambda sensor
determines air/fuel mixture by exhaust gas
Rich
more fuel than air
Lean
Mainly air than fuel
choke
(petrol only) restricts airflow to allow cold starting
glowplug
(diesel only) warms up fuel as it cannot compress at cold temperatures
DOHC
DoubleOverHeadCam
timing belt
turns valves by the crankshaft
crankshaft
turned by pistons driven by exhaust gasses
piston
converts chemical energy to mechanical energy
Injector
squirts fuel at a very fine mist
ECU
Engine management control unit
radiator
cools engine down using water/coolant systems