n - heptane
iso - octane
depends on fuel quality
same size of flywheel
automatic ignition of the charge at the end of compression
ignition induced by the passage of a spark
ignition of the charge before the passage of flame front
ignition induced to supplement the process of normal combustion
Auto ignition is defined as the self-ignition of the vapors emitted by a liquid heated above its ignition temperature.
reduce the resistance to sliding that occurs between the cam and the tappet.
allow for lengthening of the valve owing to the heat of combustion
increase the speed at which the valves move up and down
make the crankshaft turn smoothly
It is necessary to maintain the valve clearance as they allow for lengthening of the valve owing to the heat of combustion.