Engine

Details Engine Engine

2006-08-01

2006-08-01

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder head

C123S090270, C123S1950HC

Reexamination Certificate

active

07082917

ABSTRACT:
An engine includes a cylinder head having a valve-operating chamber. A cylinder head is coupled to a cylinder block by a plurality of fastening bolts. A head cover is coupled to the cylinder head to close the valve-operating chamber. A ventilating gap is defined between a face of the cylinder head fastened by the fastening bolts and a bottom wall of the valve-operating chamber. An operating bore is provided in the bottom wall to enable insertion of at least one of the fastening bolts and a tool for tightening the fastening bolt. A plug is integrally provided in the head cover to be liquid-tightly fitted into the operating bore. Cooling of portions around the bottom wall of the valve-operating chamber is improved, while the cylinder head can be fastened to the cylinder block from the side of the valve-operating chamber by the fastening bolts.

REFERENCES:
patent: 4291650 (1981-09-01), Formia et al.
patent: 4727833 (1988-03-01), Nakashima
patent: 4972813 (1990-11-01), Sugiura
patent: 5522354 (1996-06-01), Sakamoto et al.
patent: 5609129 (1997-03-01), Hauf et al.
patent: 6279529 (2001-08-01), Komatsu et al.
patent: 6484679 (2002-11-01), Ito et al.
patent: 6953015 (2005-10-01), Asari et al.
patent: 2-32849 (1990-09-01), None

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