Engine Terminology
Acronyms
Pistons & Parts
Fueling
Blocks & Heads
100

The ignition system of a diesel engine.

What is Compression?

100

RPM

What is Revolution Per Minute?

100

This piston has a clearance window for the crankshaft counter balance weight.

What is a Slipper Skirt?

100

The rating for the level of filtration in a fuel filter.

What is the Micron rating?

100

The engine with a non removable cylinder.

What is a Parent Bore block?

200

The section of the engine block housing the crankshaft.

What is the crankcase?

200

TDC

What is Top Dead Center?

200

The part of the piston is subjected to high pressure and high heat.

What is the Crown?

200

A device that removes moisture form the fuel.

What is a Fuel-water Separator?

200

The block liner only partially in contact with coolant.

What is a Mid-stop Liner?

300

A fuel delivery system that uses a pre ignition chamber formed in the cylinder head using a pintle nozzle.

What is Indirect Injection (IDI)?

300

ULSD

What is Ultra Low Sulfur Diesel?

300

The piston design consisting of two pieces.

What is an Articulating Piston?

300

The device that controls fueling to the engine based on load and rpm demands.

What is a Governor?

300

The angle in which V-8 cylinders banks are arranged.

What is 90 Degrees?

400

The compression ratio most commonly used by on-highway DI engines.

What is 16:1?

400

HEUI

What is Hydraulic-(actuated)  Electronic- (controlled) Unit Injector?

400

The bottom most ring.

What is Oil Control Ring?

400

The difference in time between injection and ignition.

What is Injection Lag?

400

The component at locks the valve stem to the valve retainer.

What are the valve keepers?

500

The name of this process is sometimes call the five-stroke engine.

What is the miller Cycle?

500

BOI

What is the Beginning Of Injection?

500

The component that allows the crankshaft to move the piston.

What is a Connecting Rod?

500

The process of braking up liquid fuel into fine mist.

What is Atomization?

500

This component spins at 1/2 of the crankshaft speed.

What is the Camshaft?