4. Architectures and technological solutions
4.1 Influence of valve number and arrangement on combustion and performance
When designing a cylinder head, two objectives are sought: to facilitate filling and to control combustion.
For engines that are not supercharged, filling depends mainly on permeability. This depends on the shape of the passages and their cross-sections (number and size of valves, lift laws).
The combustion process depends on factors such as :
the volumetric ratio, which requires control of dead volumes (particularly for diesel engines);
the compactness of the combustion chamber, which reduces the flame propagation distance;
heat exchange at the...
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Architectures and technological solutions
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"Hydraulic, aerodynamic and thermal machines"
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Distribution and performance, filling, combustion
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