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The Mechanics' Lingo

Updated on July 18, 2016


Self-Propelled Vehicles- Vehicles that are powered by ones self.

Frame/Body- Provides support for the suspension and steering components along with the power train.

Body-on-frame (BOF) – A separate frame and body.

Inline Engines- Four to Six cylinder engines that were arranged inline.

Flathead- The cylinder head simply covered the combustion chamber and includes a hole for the spark plug.

Overhead Valve- Valves are located in the cylinder head.

Single Overhead Camshaft- One camshaft is viable for the intake and exhaust valve.

Double Overhead Camshaft- Two separate camshafts, one viable for intake valve and the second is viable for the exhaust valve.

Water Pump- Circulates coolant.

Water Jackets – the passages in the cylinder block and head.

Radiator – Cools coolant by releasing the heat into the air.

Thermostat- Located in the Coolant Passage. – Maintains the coolant temperature.

Oil Pan/Oil Sump - Holds 3-7 liters of oil.

Oil Pump - Forces the oil under pressure through an oil filter.

Oil Filter - Filters oil.

Oil Galleries - Passages in the block and head.

Air Filter- Filters air.

Intake Manifold- Governs the air-fuel mixture in the engine to the relative cylinder where it is used to produce power by burning.

Evaporative Emissions Control System (EVAP System)- Prevents gasoline fumes an vapors from being released.

Intake Valve - When open, the piston descends downward, drawings a mixture of air and fuel into the cylinder.

Exhaust Valve - The valve that opens to let the burned gases out of the cylinder by the piston.

Spark Plugs - Provide an air gap inside the cylinder where a spark occurs to start combustion.

Ignition Coil – Increase battery voltage to 5,000 to 40,000 volts.

Ignition Control Mode (ICM)- Controls when the sparkplug fires.

Associated Wiring- electronically connects the battery, ICM, coil, and spark plugs.

Combustion Chamber- Power chamber, in which chemical energy of gasoline is converted into heat energy.

Combustion- The chemical energy in fuel is converted to heat energy by burning of the fuel at a controlled rate.

Internal Combustion Engine- Engine combustion occurs within the power chamber.

External Combustion Engine- Burns fuel outside of the engine itself, ex. Steam engine.

Mechanical Force- The pressure developed with in the combustion chamber.

Mechanical Power- Useful energy

Block- solid frame; cradle that everything sits in.

4 stroke – Intake, Compression, Power, Exhaust.

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