GASOLINE ENGINE Flashcards
This bottom is indented and forms the combustion chamber with the piston
Cylinder head
This receives the combustion pressure with the piston
Cylinder Block
This converts the reciprocating motion of the pistons into revolving motion
Crankshaft
This transfer the force that the piston is received to the crankshaft.
Connecting Rod
Three essential elements of gasoline engine are “good-air mixture”, “good compression”, and
“good preheating system”
FALSE
The compression ration can be calculated in the formula: (Volume of combustion chamber +
Volume of cylinder) / Volume of combustion chamber
TRUE
When the air-fuel ratio is 14.7, it means that the air-fuel volume is 14.7 against 1 of the gasoline
volume
TRUE
To burn the compressed air-fuel mixture efficiently, it requires good spark.
TRUE
The rotation speed of the intake or exhaust camshaft is same as that of the crankshaf
TRUE
The intake valve opens before TDC (Top Dead Center) and closes after BDC (Bottom Dead
Center), while the exhaust valve opens before BDC and closes after TDC
TRUE
The valve overlap is the period that the intake and exhaust valves open simultaneously.
TRUE
If there is a malfunction in the valve clearance, generally replace the cam to ensure the normal
clearance
FALSE
If the relief valve of the oil pump sticks with opened, it causes the seizure in the lubrication
portion
TRUE
The relief valve of the oil filter is released so that the oil is circulated even if the filler portion of
the oil filter is clogged. Therefore, the oil filter does not require the replacement
FALSE
The oil pressure warning lamp is turned on when the oil pressure is abnormally high or low.
FALSE
If there is no engine oil leakage, the oil volume never decreases
TRUE
The radiator with the electric motor-driven cooling fan is cooled by the cooling fan at all times.
FALSE
If there is a trace that the coolant leaks out from the drain hole, it is likely that a defective
mechanical seat or bearing is the cause.
TRUE
When repairing the water pump, normally replace the assembly except some models.
TRUE
Heat expansion of the spring in the thermostat opens and closes the thermostat.
TRUE
While the control of the injection volume and timing of the conventional EFI-diesel is effected by
the ECU, the fuel pressurizing and distribution mechanisms are identical to the conventional
mechanical type.
True
In both the conventional EFI-diesel and common-rail EFI-diesel systems, the injection volume
and timing are precisely controlled by the ECU to match the driving conditions
TRUE
In the conventional EFI-diesel, the injectors are controlled according to the signals from the ECU.
TRUE
