Cylinder head structure

Internal-combustion engines – Particular piston and enclosing cylinder construction – Cylinder head

Reexamination Certificate

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Reexamination Certificate

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07152566

ABSTRACT:
The bottom surface18of the cylinder head10is formed by an intake-side bottom surface18aand an exhaust-side bottom surface18bon which an intake port13and an exhaust port15are formed respectively. Further, a first wall19formed between an intake-side water jacket16and the intake-side bottom surface18ais larger in thickness than a second wall20formed between an exhaust-side water jacket17and the exhaust-side bottom surface18b. This structure can reduce an amount of HC included in exhaust gas.

REFERENCES:
patent: 4418655 (1983-12-01), Henning
patent: 4844030 (1989-07-01), McAvoy
patent: 4962733 (1990-10-01), Cheung
patent: 5230312 (1993-07-01), Baika et al.
patent: 64-51747 (1984-03-01), None

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