At low RPM. At what speed must a crankshaft turn if each cylinder of a four-stroke cycle engine is to be fired 200 times a minute?
400 RPM
.
What special procedure must be followed when adjusting the valves of an engine equipped with a floating cam ring?
What special procedure must be followed when adjusting the valves of an engine equipped with a floating cam ring?
Eliminate cam bearing clearance when making valve adjustment
.
At what speed must a crankshaft turn if each?
At low RPM. At what speed must a crankshaft turn if each cylinder of a four-stroke cycle engine is to be fired 200 times a minute?
400 RPM
.
How many degrees the crankshaft will rotate with both the intake and exhaust valves seated?
Exhaust stroke: occurs when exhaust valves open at 60° BBDC and close at
16° ATDC
(total duration is 256° of crankshaft rotation) In this polar valve timing diagram, note that both the intake and exhaust valves are open for a period of 16° BTDC and for 16° ATDC.
How many degrees of crankshaft travel after ignition does the intake valve open?
When is the fuel/air mixture ignited in a conventional reciprocating engine
What directly regulates the speed of a turbocharger?
Limits the maximum manifold pressure that can be produced by the turbocharger at full throttle. … Controls that rate at which the turbocharger discharge pressure will increase. What directly regulates the speed of a turbocharger?
Waste gate
What is a floating cam ring?
What is a floating cam ring on a large radial engine
Which bearing is least likely to be a roller?
7 (8007) – Which bearing is least likely to be a roller or ball bearing?
B- Master rod bearing (radial engine
What kind of test is performed on an aircraft engine to prove its reliability?
Compression testing is basically a test to determine the amount of leakage past the piston rings and valves in an engine cylinder. The type of compression test used for aircraft engines is
a differential compression test
.
How is the compression ratio of a piston engine determined?
Measure the water it took to fill the cylinder with the piston at bottom dead center, and then divide that by the amount of water needed to fill the cylinder with the piston at top dead center
. The ratio of the two different volumes is the compression ratio.
What type of crankshaft is used by a six cylinder horizontally opposed engine?
The
six-throw shaft
is used on six-cylinder inline engines, 12-cylinder V-type engines, and six-cylinder opposed engines. Crankshafts of radial engines may be the single-throw, two-throw, or four-throw type, depending on whether the engine is the single-row, twin-row, or four-row type.
What would be the effect on valve opening if the clearance was set I too large II too small?
Too much clearance means the valves will likely clatter and, over the long term, cause damage to the valves, camshaft lobes or rocker arms. If there’s too little valve clearance,
the valves won’t fully close, causing excessive heat, and the engine will lose power
.
What is a four stroke five event cycle?
A four-stroke cycle engine completes five Strokes in one operating cycle, including
intake, compression, ignition, power, and exhaust Strokes
. Intake Stroke. The intake event is when the air-fuel mixture is introduced to fill the combustion chamber.
What is used to drive a supercharger?
Superchargers are typically driven via a mechanical drive—usually a belt—connected to the engine’s crankshaft.
An electric motor
can also be used to drive the supercharger, especially if the vehicle already has an electrical system with sufficient capacity.
Why do some turbocharger installations include an after cooler?
The function of a charge air cooler is
to reduce the temperature of compressed air from the turbo before it enters the intake manifold
. … A charge air cooler reduces the temperature from ~450°F (from the turbo) to ~40°F above the ambient air temperature as it enters the intake manifold.
When oil pressure is increased to the wastegate controller?
When oil pressure is increased on the piston, the waste gate valve
moves toward the closed position
, and engine output power increases. Conversely, when the oil pressure is decreased, the waste gate valve moves toward the open position, and output power is decreased as described earlier.
