Engines chapter 1
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Power density
The power an engine produces for its displacement
Thermal efficiency
A comparison between the amount of energy released during combustion and energy available at the engine flywheel.
Compression ratio
A comparison between total cylinder volume and clearance volume
Common rail
A high-pressure injection system that electronically varies injection pressure, timing, and rate.
Torque
A measurement of rotational, or twisting, force transmitted from the crankshaft to the flywheel
