Air intake muffler and outboard engine assembly having the same
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsMasanori Tsubouchi, Tomonori Ikuma
Life of this patent
Estimating the term…
Abstract
An air intake muffler has an enclosure having a longitudinal axis, a first portion, and a second portion defining with the first portion an interior space of the enclosure. An air intake connecting duct is formed unitarily with the first portion of the enclosure and extends outwardly from the interior space of the enclosure. A pair of outside air intake ducts for introducting outside air into the interior space of the enclosure diverge in a V-shaped configuration from the longitudinal axis of the enclosure. Each of the outside air intake ducts has a pair of mating concave portions each formed unitarily with a respective one of the first and second portions of the enclosure and extending outwardly from the interior space of the enclosure.
Claims31
An air intake muffler for introducing outside air to be fed to an air intake passage of a throttle valve unit of an engine, the air intake muffler comprising:
- an enclosure having a longitudinal axis, a first portion, and a second portion defining with the first portion an interior space of the enclosure;
- an air intake connecting duct for connection to an air intake passage of a throttle valve unit of an engine, the air intake connecting duct being formed unitarily with the first portion of the enclosure and extending outwardly from the interior space of the enclosure;
- and a pair of outside air intake ducts for introducing outside air into the interior space of the enclosure, the outside air intake ducts diverging in a V-shaped configuration from the longitudinal axis of the enclosure, and each of the outside air intake ducts having a pair of mating concave portions each formed unitarily with a respective one of the first and second portions of the enclosure and extending outwardly from the interior space of the enclosure.
An outboard engine assembly comprising:
- an engine having a throttle valve unit;
- and
- an air intake muffler disposed over the engine and comprised of an enclosure having a longitudinal axis and a pair of body portions connected together to define an interior space of the enclosure, an air intake connecting duct connected to an air intake passage of the throttle valve unit and formed unitarily with one of the body portions of the enclosure, and a pair of outside air intake ducts for introducing outside air into the interior space of the enclosure, the outside air intake ducts diverging in a V-shaped configuration from the longitudinal axis of the enclosure, and each of the outside air intake ducts having a pair of mating concave portions each formed unitarily with a respective one of the body portions of the enclosure.
An air intake muffler for introducing outside air to be fed to an air intake passage of a throttle valve unit of an engine, the air intake muffler comprising:
- an enclosure having a pair of body portions connected together to define an interior space of the enclosure;
- at least one outside air intake duct integral with and projecting outwardly from the enclosure for introducing outside air into the interior space of the enclosure, the outside air intake duct having a pair of mating concave portions;
- and a connecting duct connectable with the air intake passage of the throttle valve unit of the engine for delivering the outside air from the interior space of the enclosure into the engine through the throttle valve unit, the connecting duct being integral with one of the body portions of the enclosure and projecting outwardly from the enclosure in a direction generally the same as a direction in which the outside air intake duct projects from the enclosure.
An air intake muffler for introducing outside air to be fed to an air intake passage of a throttle valve unit of an engine the air intake muffler comprising:
- an enclosure having a pair of body portions connected together to define an interior space of the enclosure;
- at least one outside air intake duct integral with and projecting outwardly from the enclosure for introducing outside air into the interior space of the enclosure, the outside air intake duct having a pair of mating concave portions;
- a connecting duct connectable with the air intake passage of the throttle valve unit of the engine for delivering the outside air from the interior space of the enclosure and into the engine through the throttle valve unit, the connecting duct being integral with one of the body portions of the enclosure and projecting outwardly from the enclosure;
- a retaining frame integral with one of the body portions of the enclosure and disposed upstream of the connecting duct;
- and a flame arrester supported by the retaining frame for preventing backfire of flames from entering the engine.
An outboard engine assembly comprising:
- a V-type multi-cylinder vertical engine having a throttle valve unit and at least two cylinders arranged in a V-shaped configuration;
- and an air intake muffler comprised of an enclosure having a pair of body portions connected together to define an interior space of the enclosure, at least two outside air intake ducts for introducing outside air into the interior space of the enclosure, and a connecting duct connected to the throttle valve unit of the engine for delivering the outside air from the interior space of the enclosure into the V-type multi-cylinder vertical engine through the throttle valve unit, the outside air intake ducts being integral with and projecting outwardly from the enclosure in a V-shaped configuration and disposed over the cylinders of the V-type multi-cylinder vertical engine, and the connecting duct being integral with one of the body portions of the enclosure and projecting outwardly from the enclosure in a direction generally the same as a direction in which the outside air intake duct projects from the enclosure.
Dependencies are inferred from the claim text.