Water-cooled engine

Internal-combustion engines – Cooling – With jacketed head and/or cylinder

Reexamination Certificate

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Details

C123S041740

Reexamination Certificate

active

07069882

ABSTRACT:
In a water-cooled multi-cylinder vertical engine for an outboard engine system, cooling water having passed through an exhaust-manifold cooling water jacket for cooling an exhaust passage within an engine room is supplied to a cylinder-block cooling water jacket provided in a cylinder block through water supply pipes, a branching member and two upper and lower couplings. In this case, the lower coupling is locked below the center of a lowermost cylinder to minimize unevenness in flow rate of the cooling water flowing through a water jacket on opposite left and right sides of a cylinder toward a cooling water outlet provided at an upper portion thereof, thereby making uniform the distribution of the temperature around a combustion chamber, leading to an enhancement in cooling effect.

REFERENCES:
patent: 4312304 (1982-01-01), Tyner
patent: 61-167111 (1986-07-01), None

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