Chamber Design

The various designs of the combustion chamber in the cylinder head contains several benefits.

Combustion Chamber Design
Combustion Chamber Design

The most common chamber design in modern engines is either a domed or a pent-roof combustion chamber design, as these allow the maximum valve area within a given bore size. It also means that the spark plug can be placed right in the middle of the chamber, giving the best chance for a good burn of the air/fuel mixture.