초록 ▼

A number of embodiments of cooling systems for internal combustion engines powering marine watercraft wherein the engine cooling jacket delivers its coolant to an exhaust manifold cooling jacket adjacent the inlet end of the exhaust manifold and wherein coolant is delivered from the exhaust manifold

A number of embodiments of cooling systems for internal combustion engines powering marine watercraft wherein the engine cooling jacket delivers its coolant to an exhaust manifold cooling jacket adjacent the inlet end of the exhaust manifold and wherein coolant is delivered from the exhaust manifold cooling jacket to a further cooling jacket around the inlet portion of an exhaust elbow. In one embodiment, a closed cooling system is provided for the engine cooling jacket, exhaust manifold cooling jacket and the elbow cooling jacket. In another embodiment, the system discharges coolant back to the body of water in which the watercraft is operating through a further cooling jacket of the exhaust elbow that communicates with its discharge end.

대표청구항 ▼

In a cooling system for a watercraft internal combustion engine, said engine having a cooling jacket having an inlet and an outlet, an exhaust system for said engine comprises of an exhaust manifold having an exhaust inlet end communicating with an exhaust port of said engine and an exhaust discharg

In a cooling system for a watercraft internal combustion engine, said engine having a cooling jacket having an inlet and an outlet, an exhaust system for said engine comprises of an exhaust manifold having an exhaust inlet end communicating with an exhaust port of said engine and an exhaust discharge end for discharging exhaust gases to an exhaust inlet end of an exhaust elbow, said exhaust elbow having an exhaust outlet and for discharging exhaust gases to the atmosphere, said exhaust manifold further being provided with a cooling jacket having a coolant inlet in proximity to said exhaust inlet end and a coolant outlet spaced from said exhaust inlet end and in proximity to said exhaust discharge end, the improvement comprising means for circulating coolant only from said engine cooling jacket outlet to said exhaust manifold cooling jacket coolant inlet for delivering only heated coolant to said exhaust manifold cooling jacket, said exhaust elbow having a cooling jacket surrounding the inlet end of said exhaust elbow and having a coolant inlet and a coolant outlet, means for circulating coolant from said exhaust manifold cooling jacket coolant outlet to said first exhaust elbow cooling jacket coolant inlet and from said first exhaust elbow cooling jacket outlet, back to said engine cooling jacket inlet, and a further cooling jacket surrounding the discharge end of said exhaust elbow adapted to receive coolant and adapted to discharge the coolant into the exhaust gases discharged from said exhaust elbow.