Cylinder head assemblies

Details Cylinder head assemblies Cylinder head assemblies

2007-10-23

2007-10-23

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder head

C123S193600

Reexamination Certificate

active

11065346

ABSTRACT:
Cylinder head assemblies including a cylinder head and a piston are disclosed. The cylinder head includes: a recessed valve region including a first and second bulbous portion connected by a waist, the first bulbous portion accommodating an intake valve and the second bulbous portion accommodating an exhaust valve; an intake port passageway having a gradually contoured flowpath between an intake port and the intake valve in the valve region; and an exhaust port passageway having a gradually contoured flowpath between an exhaust port and the exhaust valve in the valve region. The piston includes a recessed region that substantially conforms to the recessed valve region of the cylinder head. Related overhaul kits and methods of making improved cylinder head assemblies are further disclosed.

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