Apparatuses for cooling exhaust components of marine engines

摘要

An elongated exhaust conduit comprises a first end receiving hot exhaust gas from a marine engine and a second end discharging the exhaust gas. An elongated cooling water jacket extends adjacent to the exhaust conduit. The cooling water jacket conveys the raw cooling water adjacent to the exhaust conduit to thereby cool the exhaust conduit and warm the raw cooling water therein and discharges the warmed cooling water to cool the marine engine. The cooling water jacket comprises first and second channels that are separate from each other. The cooling water is oriented in a helical flow around the exhaust conduit.

主权项

1. An apparatus for cooling exhaust components of a marine engine, the apparatus comprising:
an elongated exhaust conduit comprising a first end receiving hot exhaust gas from the marine engine and a second end discharging the exhaust gas; and an elongated cooling water jacket on the exhaust conduit, wherein the cooling water jacket is configured to convey the raw cooling water along an outer surface of the exhaust conduit to thereby cool the exhaust conduit and warm the raw cooling water therein and to discharge the warmed cooling water to thereby cool the marine engine; wherein the cooling water jacket defines first and second channels that are separate from each other; wherein the cooling water jacket defines a chamber into which the first and second channels are configured to conduct cooling water; wherein the chamber is located at a junction between the exhaust conduit and an exhaust manifold; and wherein the first and second channels each taper from a location that is closer to the first end of the exhaust conduit than the second end of the exhaust conduit to a location that is closer to the second end of the exhaust conduit than the first end of the exhaust conduit.