Question

advantage fat, 3e ase 1 - engine repair - (townsend-228
which of the rotary engine strokes is shown in the image above?
○ a. exhaust stroke
○ b. ignition stroke
○ c. compression stroke
○ d. intake stroke

Explanation:

To determine the rotary engine stroke, we analyze each option:

• Exhaust stroke: Involves expelling exhaust gases, not matching the image.
• Ignition stroke: Not a standard rotary engine stroke (rotary engines use ignition during the power phase, but the image shows a stroke with fuel/air intake or compression? Wait, no—wait, the image likely shows the Intake stroke? Wait, no, let's recheck. Wait, the rotary engine strokes: Intake (air-fuel mixture enters), Compression (mixture is compressed), Power (ignition and expansion), Exhaust (exhaust expelled). Wait, the image—if the ports are open for intake, but wait, the option "Ignition stroke" is not standard. Wait, no, the correct approach: In a rotary engine, the strokes are Intake, Compression, Power, Exhaust. The "Ignition stroke" is not a defined stroke. Wait, maybe the image shows the Power stroke? No, the options include "Ignition stroke" (incorrect term) and others. Wait, no—wait, the correct answer here is likely b. Ignition stroke? No, that's wrong. Wait, no—wait, let's recall: Rotary engines have four phases (strokes) per rotor: Intake, Compression, Power (ignition), Exhaust. But the options have "Ignition stroke" as a choice. Wait, maybe the image shows the ignition phase (where spark plugs fire). Alternatively, maybe the image is of the Power stroke (ignition), but the option is "Ignition stroke". Alternatively, maybe the correct answer is b. Ignition stroke? Wait, no—wait, let's check the options again. The options are: a. Exhaust, b. Ignition, c. Compression, d. Intake.

Wait, perhaps the image shows the spark plugs firing (ignition), so the stroke is Ignition. Alternatively, maybe I made a mistake. Wait, no—rotary engines: during the power stroke, ignition occurs. But the term "Ignition stroke" is not standard, but among the options, if the image shows spark plugs (yellow) and the rotor position, maybe it's the Ignition stroke. Alternatively, maybe the correct answer is b. Ignition stroke.

Wait, no—let's think again. The intake stroke has the intake port open, compression has both ports closed and rotor compressing, power (ignition) has spark plugs firing, exhaust has exhaust port open. If the image shows spark plugs (the yellow parts) and the rotor position, it's likely the Ignition (Power) stroke. So the correct option is b.

Answer:

b. Ignition stroke