Table 4 Encryption strategy and level.

From: Synergistic optimization of combustion chamber design and hydrogen injection strategies for ultra-lean combustion in hydrogen engines

Encryption regions

Encryption strategy / level

Combustion chamber

AMR/3

Valves

Fixed embedding/2

Intake and exhaust port

AMR/3

Injector nozzles

Fixed embedding/5

Injector exit

Fixed embedding/4

Piston, cylinder wall and head

Boundary embedding/2

Spark plug

Fixed embedding/5

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