What are the Advantages of 24 Valve Engines over 12 Valve Engines?

Have you observed that recently most diesel engine manufacturers prefer 24 valves cylinder head to 12 valves. Let me tell you about an example of 24 valves engines; Cat 3406B, Cummins 855, and Detroit 92 series all these mentioned engines are 24 valves engines. That means there must be reasons why [...]