Sensor arrangement for watercraft
OwnerKazumasa Itoinventor
Life of this patent
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Abstract
A watercraft incorporates a multiple cylinder engine and an exhaust system that guides exhaust gases from the engine to an external location. An oxygen sensor is provided to detect a residual amount of exhaust gases. An engine body of the engine defines a plurality of inner exhaust passages that communicate with respective combustion chambers. The exhaust system incorporates an exhaust conduit such as an exhaust manifold that defines individual exhaust passages therein that communicate with the respective inner exhaust passages. The oxygen sensor is positioned either at one of the inner exhaust passages or at one of the individual exhaust passages.
Claims12
A watercraft comprising an internal combustion engine, an exhaust system arranged to guide exhaust gases from the engine to an external location, and at least one sensor configured to detect a condition of the exhaust gases, the engine comprising an engine body, a plurality of movable members movable within the engine body, the engine body and the movable members together defining a plurality of combustion chambers, the engine body additionally defining a plurality of inner exhaust passages that communicate with the respective combustion chambers, the exhaust system comprising an exhaust conduit defining individual exhaust passages that communicate with the respective inner exhaust passages, the sensor being positioned either at an upper portion of the inner exhaust passages or the individual exhaust passages.
A watercraft comprising a multiple cylinder engine defining a plurality of combustion chambers, an exhaust system arranged to guide exhaust gases from the combustion chambers to an external location, the exhaust system defining a plurality of parallel exhaust passages that communicate with the respective combustion chambers, and an oxygen sensor positioned at an upper portion of one of the exhaust passages.
An internal combustion engine for a watercraft comprising an engine body, a plurality of movable members movable within the engine body, the engine body and the movable members together defining a plurality of combustion chambers, the engine additionally defining a plurality of inner exhaust passages that include a generally horizontally extending portion and that communicate with the respective combustion chambers, an exhaust system arranged to guide exhaust gases from the combustion chambers to an external location, the exhaust system comprising an exhaust conduit defining individual exhaust passages that include at least one generally horizontally extending portion and that communicate with the respective inner exhaust passages, and a sensor configured to detect a condition of the exhaust gases, the sensor being positioned at an upper portion of a generally horizontally extending portion of either one of the inner exhaust passages or the individual exhaust passages.
Dependencies are inferred from the claim text.