Internal-combustion engines – Cooling
Reexamination Certificate
2005-09-26
2008-03-04
Cronin, Stephen K. (Department: 3747)
Internal-combustion engines
Cooling
C123S04182R, C123S041420, C123S193300
Reexamination Certificate
active
07337755
ABSTRACT:
A cylinder head cooling structure and an oil temperature control system are provided for an internal combustion engine having a plurality of cylinders, each having a plurality of intake ports and a plurality of exhaust ports. The engine includes cooling oil jackets surrounding the spark plugs in the cylinder head, a thermostat attached to the front surface of the crankcase independently of an oil filter, and an oil temperature sensor disposed on a rear face of the cylinder block above the crankcase in an oil supply path formed on the cylinder rear face for supplying oil to the oil jackets. Oil passages conducting oil into the oil jacket are provided between two separate parts of a bifucated intake port and between two separate parts of a bifurcated exhaust port, and only cooling system oil reaching high temperatures is allowed to flow through the thermostat, thereby improving temperature control response.
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Gokan Yoshitsugu
Yamamoto Katsuji
Ali Hyder
Blackman William D.
Carrier Joseph P.
Carrier Blackman & Associates P.C.
Cronin Stephen K.
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