FIELD: engines and pumps.
SUBSTANCE: intake channel 1 is cast in ICE cylinder block 2 to communicate with engine combustion chamber via valve annular seat 4. Intake channel 1 comprises, in fact, flat surface 6a conjugated with seat 4 via rounded transition zone 7b making rounded ledge 7a in cylinder block body 2. Invention covers also cylinder block head with intake channel, ICE with cylinder block head with intake channel, and method of cylinder block head fabrication.
EFFECT: optimum straight airflow to create large head ahead of valve.
11 cl, 5 dwg
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