Exhaust structure for jet propulsion boat
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorJun Nakajima
Life of this patent
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Abstract
An exhaust structure for a jet propulsion engine in which exhaust noise can be reduced. The exhaust structure includes a tunnel-shaped pump chamber provided at a the rear portion of a hull, a jet pump provided in a pump chamber, a driving engine connected to the jet ump, and an exhaust port of the exhaust pipe extending from the engine disposed facing toward the pump chamber. A sound-deadening resonator is disposed inside the pump chamber, and the exhaust pipe is brought into communication with the resonator.
Claims20
An exhaust structure for a jet propulsion boat in which a tunnel-shaped pump chamber is provided at a rear portion of a hull of the boat, a jet propulsion machine is provided in the pump chamber, an engine is connected to the jet propulsion machine for driving the boat, and an exhaust port of an exhaust pipe extending from the engine faces toward the pump chamber,
- wherein a resonator for sound-deadening is disposed in the pump chamber and the exhaust pipe is brought into communication with the resonator.
An exhaust structure for a jet propulsion boat, comprising:
- a tunnel-shaped pump chamber extending in a fore-and-aft direction provided outside a rear portion of a hull of the boat;
- a jet propulsion machine provided in the pump chamber;
- an engine connected to the jet propulsion machine for driving the boat;
- and
- an exhaust port of an exhaust pipe extending from the engine faces toward the pump chamber,
- wherein a resonator for sound-deadening is disposed in the pump chamber and the exhaust pipe is brought into communication with the resonator.
Dependencies are inferred from the claim text.