Engine Fundamentals D2L Flashcards
What describes blocking an engine?
Preventing crankshaft rotation by locking the flywheel in position
What component ensures smooth engine operation?
Flywheel
HP and KW are units of?
Power
True or False;
Valves in an engine are opened by differences in air pressure.
False;
Camshafts open and close valves
What component connects the piston to the crankshaft?
Con-Rod
(connecting rod)
What abbreviation is used to describe an engine with one camshaft located in the head?
OHC (Over Head Cam)
What is the twisting force acting at a radius that produces a turning moment called?
Torque
What type of energy is released when fuel inside an engine made to react with oxygen?
Chemical
-stupid fucking question
What describes an engine with a stroke of 3.5in and a bore of 2.8in?
Undersquare
-longer stroke length than bore diameter (most diesels to produce high compression ratio)
What are gasses that leak past the rings on the piston called?
Blowby
What things are required for all engines to create combustion?
Fuel, Heat, Oxygen
Put each stroke in order from start to finish describing the correct operation of a four stroke engine.
Intake (suck)
Compression (squeeze)
Power (bang)
Exhaust (blow)
How many degrees does the crankshaft of a two-stroke engine rotate in one complete cycle?
360° for 2 stroke
720° for 4 stroke
What component would be observed when determining the crankshaft rotation according to the SAE organization?
Flywheel
True or False;
The position of the crankshaft throws and the arrangement of the lobes on the camshaft determine the firing order of an engine.
True
What engine configuration is also called a pancake engine?
Horizontally Opposed
-like Subaru boxer engine
What is the main advantage of an integral engine configuration?
A more compact engine and compressor arrangement
Where is the camshaft located on a pushrod engine?
Next to the crankshaft in the block
True or False;
Two-stroke engines have the artificial aspiration induction method.
True
-a blower or scavenge piston pushes air through the inlet ports.
What type of fuel is used in CI engines?
Diesel
CI= Compression ignition
What is used to aid in cooling an air cooled engine?
A larger lubrication supply
True or False;
A close-coupled engine load has it’s own mounting feet and relies on the rigid base to ensure correct alignment is maintained between the engine and load.
False
-the driven unit attaches directly to the engine flywheel and flywheel housing. May use engines main bearing as a support.
