What are the advantages of having larger valves over two smaller ones?

Question

in engines otto cycle

Answer 1

None. Now, you say "larger valves" as, in more than one.

Obviously, larger valves permit more fuel/air flow.

And, what is an otto cycle?

Answer 2

Modern engines usually use four valves. It is not practical to simply use two larger valves, for reasons of simple geometry (two smaller intake valves will fit side-by-side on one side of the combustion chamber, whereas a single one cannot be made much larger) and to keep the mass, and therefore inertia, of individual valves as low as possible. Multi-valve geometry also tends to favor the spark plug being located at the top of the combustion chamber, which can be ideal for even flame propagation during combustion. In addition, particularly as the valve begins to open, for equivalent valve/port areas multi-valve geometry allows for increased airflow.