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AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsTakaji Kawai, Hitoshi Ishida, Masanori Takahashi, Sadato Yoshida, Masaki Okazaki
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A cowling assembly for an outboard motor includes an improved construction that can supply relatively cool air containing little water to the induction device and can also supply air to cool engine components without reducing the charging efficiency. The outboard motor has an engine that includes an air induction device and is enclosed within the cowling. The cowling assembly defines a closed cavity in which the engine is contained and has an air intake system. An air intake duct structure introduces air into the cavity. The intake duct structure includes a plurality of relatively narrow connection passages and has an expansion chamber portion disposed on the downstream side of the passages. Intake noise is reduced by this construction. In one preferred form, the cowling assembly additionally has a second intake system. One or more connection passages communicate with the first air intake system and the second air intake system.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including an air compartment divided from the space by a divider and having an elongate, generally tubular air intake duct adapted to conduct air from the air compartment through the divider and into the space, and at least a portion of the tubular air duct is divided into a plurality of elongated passages.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including an air compartment having an air intake duct adapted to direct air from the air compartment into the space, a drain passage being formed through a wall of the air compartment, and a conduit extends from the drain passage into a lower portion of the cowling assembly.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including an air compartment and having an air intake duct structure adapted to direct air from the air compartment into the space, the air duct structure including an inlet end and an outlet end, and a plurality of elongated passages are formed through the duct structure and extend from the inlet end to a point between the inlet end and the outlet end, the passages being arranged in a honeycomb-like manner.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including an air compartment and having an air intake duct structure adapted to direct air from the air compartment into the space, the air duct structure including an inlet end, an outlet end, and a passage portion disposed therebetween, the passage portion comprising a plurality of elongated passages and an expansion chamber disposed downstream of the passages, wherein the passage portion is formed separately from the duct structure and is selectively installable within the duct structure.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including an air compartment and having an air intake duct structure adapted to direct air from the air compartment into the space, the air duct structure including an inlet end, an outlet end, and a passage portion and second portion therebetween, the passage portion comprising a plurality of elongated passages and an expansion chamber disposed downstream of the passages, the second portion comprising a transverse wall adjacent the inlet end and a cavity disposed downstream of the transverse wall, and a divider is formed between the expansion chamber of the passage portion and the cavity of the second portion.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including an air compartment and having an air intake duct structure adapted to direct air from the air compartment into the space, the air duct structure including a plurality of elongated passages formed therethrough, wherein the duct structure has a cross-sectional area, and each of the passages has a cross-sectional area, and the cumulative cross-sectional area of the passages is significantly less than the cross-sectional area of the duct structure.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including an air compartment and having an air intake duct structure adapted to direct air from the air compartment into the space, the an duct structure including a plurality of elongated passages formed therethrough, wherein each of the flow passages has a cross-sectional area and the air compartment has a cross-sectional area adjacent to the duct structure, and a cumulative cross-sectional area of the ducts is significantly less than the cross-sectional area of the air compartment adjacent to the duct structure.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction, device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including an air compartment and having an air intake duct structure adapted to direct air from the air compartment into the space, the air duct structure including a plurality of elongated passages formed therethrough, wherein at least two of the flow passages have differing cross-sectional sizes.
An outboard motor comprising an internal combustion engine, a propulsion device configured to be driven by the engine, and a cowling defining an internal space, the engine being disposed generally within the space, the cowling having an air inlet, a divider between the air inlet and the space and configured to at least partially define an inlet chamber between the air inlet and the space, and an elongate tube extending through the divider, the tube having an inlet end and an outlet end, and at least a portion of the tube is divided into a plurality of elongate passages.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including a front air compartment and a rear air compartment, each of the front and rear air compartments having an air intake duct adapted to direct air from the air compartment into the space, and a conduit communicates between the front and rear air compartments, the conduit communicating with the front air compartment through a front passage and with the rear air compartment through a rear passage, and the rear passage is vertically higher than the front passage.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including a front air compartment and a rear air compartment, each of the front and rear air compartments having an air intake duct adapted to direct air from the air compartment into the space, and a first and a second conduit communicates between the front and rear air compartments, the first conduit being positioned generally in a starboard side of the cowling and the second conduit being positioned generally in a port side of the cowling.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including a front air compartment and a rear air compartment that are separated from the space by a front air compartment wall portion and a rear air compartment wall portion, respectively, each of the front and rear air compartments having an air intake duct adapted to direct air from the respective air compartment through the respective wall portion and into the space, and a conduit communicates between the front and rear air compartments.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to chive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including an elongate air compartment divided from the space by a divider and having an air intake duct adapted to conduct air from the air compartment through the divider and into the space, and at least a portion of the air duct is divided into a plurality of elongated passages, and the elongate air duct is defined by a perimeter wall.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including a front air compartment and a rear air compartment, each of the front and rear air compartments having an air intake duct adapted to direct air from the air compartment into the space, and a conduit communicates between the front and rear air compartments, wherein the conduit is a hose.
An outboard motor comprising an internal combustion engine and a cowling assembly enclosing the engine, the engine adapted to drive a propulsion device and including an air induction device, the air induction device including an air inlet that opens into a space defined within the cowling assembly, the cowling assembly including a front air compartment and a rear air compartment, each of the front and rear air compartments having an air intake duct adapted to direct air from the air compartment into the space, and a conduit communicates between the front and rear air compartments, the conduit being at least partially formed as part of the cowling assembly.
Dependencies are inferred from the claim text.