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US 8,127,540 B2Granted
Exhauster for motorcycle and motorcycle including exhauster
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorKeiichi Harada
Life of this patent
Estimating the term…
Abstract
An exhauster for a motorcycle with a reduced number of components and reduced cost in a structure containing a variable passage area valve. An exhaust chamber has a box-shaped chamber main body, a plurality of expansion chambers a through c formed by sectioning the interior of the chamber main body with partitioning walls, and communication passages for connecting the expansion chambers a through c with one another. A variable passage area valve that controls passage area is contained in the communication passage.
Claims20
An exhauster for a motorcycle, comprising:
- a first exhaust pipe connected with an engine;
- an exhaust chamber connected with the first exhaust pipe;
- and
- a second exhaust pipe connected with the exhaust chamber,
- wherein the exhaust chamber has a box-shaped chamber main body, a plurality of expansion chambers formed by sectioning an interior of the chamber main body with partitioning walls, and communication passages connecting the expansion chambers so that the connected expansion chambers and the communication passages are capable of forming a constant passage of exhaust gas, and
- further wherein a passage area control mechanism that controls passage area is contained in one of the communication passages that is the only communication passage between two of the chambers such that exhaust gas that enters the exhaust chamber must be communicated through the passage area control mechanism to exit the exhaust chamber.
3 more elements
An exhauster for a motorcycle, comprising:
- a first exhaust pipe connected with an engine;
- an exhaust chamber connected with the first exhaust pipe, the exhaust chamber including
- a box-shaped chamber main body,
- a plurality of expansion chambers formed by sectioning an interior of the chamber main body with partitioning walls, the expansion chambers including a first expansion chamber connected with the first exhaust pipe, a third expansion chamber, and a second expansion chamber connected between the first expansion chamber and the third expansion chamber,
- communication passages connecting the expansion chambers, and
- a passage area control mechanism that controls passage area being contained in at least one of the communication passages, wherein the passage area control mechanism has a communication pipe disposed in a vicinity of a side wall of the chamber main body, a valve shaft disposed to penetrate through the communication pipe, and a valve plate provided within the communication pipe and fixed to the valve shaft, the valve shaft extending in a vehicle width direction and penetrating through the side wall to be exposed to the outside, the passage area control mechanism having a communication passage through which the second expansion chamber communicates with the third expansion chamber;
- and
- a second exhaust pipe connected with the exhaust chamber and to the third expansion chamber.
5 more elements
An exhauster for a motorcycle, comprising:
- a first exhaust pipe connected with an engine;
- an exhaust chamber connected with the first exhaust pipe, the exhaust chamber including
- a box-shaped chamber main body,
- a plurality of expansion chambers formed by sectioning an interior of the chamber main body with partitioning walls, the expansion chambers including a first expansion chamber connected with the first exhaust pipe, a third expansion chamber, and a second expansion chamber connected between the first expansion chamber and the third expansion chamber,
- communication passages connecting the expansion chambers, and
- a passage area control mechanism that controls passage area being contained in at least one of the communication passages;
- and
- a second exhaust pipe connected with the exhaust chamber and to the third expansion chamber,
- wherein the first exhaust pipe has a third exhaust pipe through which exhaust gas flows into the first expansion chamber from an outside to an inside substantially in a vehicle width direction, and a fourth exhaust pipe through which exhaust gas flows into the first expansion chamber from an upper side to a lower side substantially in an up-down direction.
6 more elements
An exhauster for a motorcycle, comprising:
- a first exhaust pipe connected with an engine;
- an exhaust chamber connected with the first exhaust pipe, the exhaust chamber including
- a box-shaped chamber main body,
- a plurality of expansion chambers formed by sectioning an interior of the chamber main body with partitioning walls, the expansion chambers including a first expansion chamber connected with the first exhaust pipe, a third expansion chamber, and a second expansion chamber connected between the first expansion chamber and the third expansion chamber,
- communication passages connecting the expansion chambers so that the connected expansion chambers and the communication passages are capable of forming a constant passage of exhaust gas, and
- a passage area control mechanism that controls passage area being contained in one of the communication passages that is the only communication passage between two of the chambers;
- and
- a second exhaust pipe connected with the exhaust chamber and to the third expansion chamber,
- wherein the first expansion chamber, the third expansion chamber, and the second expansion chamber are arranged in this order from a front of the vehicle.
6 more elements
Dependencies are inferred from the claim text.