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am unit 29
| Question | Answer |
|---|---|
| Internal combustion engine | device that burns fuel inside a cylinder to create a force that drives a piston. |
| Piston | a sliding cylinder fitting within a cylindrical vessel that receives the force of combusting fuel. |
| Crankshaft | a shaft with an offset projection that converts circular motion to reciprocal motion, or visa versa. |
| Reciprocating | return; move back and forth |
| Horizontal shaft engine | an engine with a crankshaft that lies crossways for normal operation |
| Vertical shaft engine | an engine whose crankshaft is vertical for normal operation. |
| Stroke | the movement of a piston from top to bottom or from bottom to top. |
| Cycle | all the events that take place as an engine takes in air and fuel, compresses the air-fuel mixture, burns the fuel, and expels the burned gasses. Also the current produced by one turn of a generator armature. |
| Two-cycle engine | an engine with two strokes per cycle. |
| Poppet valve | a valve that controls the flow of air and gases by moving up and down. |
| Port | a special hole in the cylinder wall of a two-cycle engine to permit gases to flow in or out of the cylinder. |
| Reed valve | a flat, flexible plate that permits air or liquid to pass in one direction but seals when the flow reverses. |
| Intake stroke | engine process of taking fuel and air into the combustion chamber. |
| Compression stroke | movement of an engine piston to squeeze or compress the ari-furl mixture. |
| Compression ratio | the relationship between the volume of an engine cylinder at the beginning and end of the compression stroke. |
| Top dead center (TDC) | position of a piston when at its highest point ( furthest from the crankshaft) |
| Bottom dead center (BDC) | piston at its lowest point ( point nearest the crankshaft). |
| Fire | flame: to make a spark jump across an air gap. |
| Ignition | a spark igniting an air-fuel mixture. |
| Power stroke | the engine process in which burning fuel expands rapidly but evenly to drive the piston down. |
| Exhaust | burned gases removed by the motion of a piston. |
| Exhaust stroke | movement of a piston which expels burned gases from cylinder. |
| Revolution | one complete turn of 360 degrees. |
| Momentum | turning force of the flywheel and other moving parts that carries an engine through nonpower strokes |
| Maintenance | doing the tasks that keep a machine in good condition. |
| Troubleshooting | determining what causes a malfunction in a machine or process. |
| Repair | to replace a faulty part or make it work correctly. |
| Adjust | to set a part or parts to function as designed. |
| Contaminant | any material that does not belong in a substance. |
| Saturate | to add a substance until the excess starts to run out. |
| Dual | two |
| Precleaner | a device that removes large particles from air entering an air cleaner. |
| Shroud | to cover: a cover. |
| Score | to scratch |
| Torqued | a twisting force: to twist. |
| Speed indicator | a device used to measure revolutions per minute(RPM) of a shaft or part. |
| RPM | revolutions per minute |
| Leaner | a greater proportion of air and a lesser proportion of fuel in an air-furl mixture |
| Richer | a mixture with an increased proportion of fuel to air |
| Labor | to struggle or work hard to keep running |
Created by:
sbowen
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