The cycle shown at the top of the figure is the simple Otto cycle. This cycle is

Question

The cycle shown at the top of the figure is the simple Otto cycle. This cycle is reproduced in dashes eight more times in the remaining diagrams. The solid black lines represent similar cycles that each demonstrate one modification from the simple cycle. Match the modifications in the list below to the appropriate diagram. Write the letter of the modification inside the proper diagram. fouled spark plug (slow ignition) timing advanced (ignition after top dead center) sticking exhaust valve acceleration turbocharged blown engine (pistons don't move) idle speeds timing retarded (ignition before top dead center) overheating friction in cylinder (low oil pressure) intake and/or exhaust valves leaking

Explanation / Answer

a-2 (incomplete heat addition)

b-5 ( heat addition after top dead centre)

c-3 ( incomplete exhaust removal)

d-5 ( late ignition)

e-8 ( already some heat added)

f-1 (incomplete piston movement)

g-7 ( early ignition)

h-7 (early ignition)

i-6 ( extra heat addition)

j-1 (incomplete piston movement)

k-4 (not proper compression because of leakage)

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