Chapter 3 review
Match each component of the rotary engine to its correct location:
1: Housing 2: Spark plugs 3. Intake port 4. Rotor 5. Exhaust port
Technician A states that plain bearings are constructed of one material or layers of many different materials. Technician B states that plain bearings made of one material are aluminum bearings. Which technician is correct?
Both technicians A and B
Which stage of the rotary engine cycle begins when the rear seal of the rotor is no longer exposed to the intake port?
Compression
A bearing's ability to adapt to variation (adapt keyword)
Conformability
Allows the bearing to adapt to misalignment between the bearing and shaft
Conformability
Prevents particles from damaging the surface of the journals
Embedability
During which stage in the rotary engine cycle do gases exit the housing?
Exhaust
Metal bushings are used in low load applications.
False
Plastic bushings are typically found on both ends of the engine strut mounts.
False
Rotary engines are very fuel-efficient.
False
Rotary engines contain one spark plug in each port.
False
Rotary engines put out only a small amount of power.
False
Rotary engines use seven main components.
False
Rubber bushings require lubrication to function properly.
False
The exhaust port compresses the air and fuel mixture.
False
The spark plugs, housing, and rotor are the only main components of a rotary engine.
False
Allows bearing to withstand heavy loads
Fatigue Strength
_________ continues to manufacture rotary engine-powered vehicles today.
Mazda
Technician A says the rotary engine uses cylinders and rotaries as pressure combustors in the engine. Technician B says the piston engine uses crankshafts and output shafts in the engine. Which technician is correct?
Neither technician A nor B
has eccentric lobes
Output Shaft
provides the bearings with lubrication
Output Shaft
changes the working chamber size in the housing
Rotor
has an internal bearing in the center
Rotor
Technician A says that apex seal failure has occurred if compression is leaking between two chambers. Technician B says that loss of coolant can occur at the internal gear if the gear is misaligned. Which technician is correct?
Technician A
Technician A says that the Renesis rotary engine is more efficient than the traditional rotary engine. Technician B says that the rotary engine does not work well with turbochargers. Which technician is correct?
Technician A
A complicated emissions control system would be the only way to lower a rotary engine's poor emissions.
True
Flexure bushings reduce excessive movement.
True
Rotary engines contain three individual chambers.
True
The apex seals help seal the three chambers in the rotary engine.
True
The purpose of bushings is to reduce friction between moving parts.
True
The rotary engine has a high power to-weight ratio.
True
The rotor pocket creates additional displacement for the air and fuel mixture in the rotary housing.
True
Threaded insert bushings press into components.
True