Exhaust System and Saddle-Ride Type Vehicle

• US 20070181360A1
• Filed: 08/01/2006
• Published: 08/09/2007
• Est. Priority Date: 08/02/2005
• Status: Active Grant

• Current Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Original Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Inventors: NAKAYAMA, Yoshiharu
• Granted Patent: US 7,686,122 B2
• Time in Patent Office: Days
• US Class Current: 180/309
• CPC Class Codes: F01N 1/02 by using resonance
• CPC Class Codes: F01N 13/10 of exhaust manifolds with cooling jacket F01N3/046
• CPC Class Codes: F01N 13/1805 Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body pipe joints in general F16L; fixing auxiliaries in motor vehicles in general B60K

Abstract

An exhaust system for a saddle-ride type vehicle provides sufficient volume in a chamber while avoiding interference between the chamber and other parts. The vehicle center of gravity is lowered and differences in exhaust pipe length are reduced. Exhaust pipes are connected to combustion chambers of front and rear cylinder banks of a V-type engine. A chamber is connected to the exhaust pipes and mufflers are connected to the chamber. The chamber has an exhaust pipe connection wall to which the exhaust pipes are connected and opposing muffler connection walls. The mufflers are connected to positions on the muffler connection walls closer to the engine relative to a center in a longitudinal direction of the vehicle.

Claims

1. An exhaust system for a saddle-ride vehicle having an engine, a front cylinder bank and a rear cylinder bank, comprising:

exhaust pipes connected to the front and rear cylinder banks;

a chamber for exhaust gases comprising an exhaust pipe connection wall facing a rear wall in a vehicle longitudinal direction, wherein ends of all of the exhaust pipes are connected to the exhaust pipe connection wall, and a pair of muffler connection walls opposed in a vehicle width direction; and

mufflers connected to positions on the muffler connection walls that are closer to the engine than a center in the longitudinal direction of the vehicle.

2. The exhaust system according to claim 1, wherein

the front cylinder bank is farther from the exhaust pipe connection wall than the rear cylinder bank, and

ends of exhaust pipes connected to the front cylinder bank are connected to side portions of the exhaust pipe connection wall in a vehicle width direction, and ends of exhaust pipes connected to the rear cylinder bank are connected to center portions of the exhaust pipe connection wall in the vehicle width direction.

3. The exhaust system according to claim 1, wherein

the front cylinder bank is farther from the exhaust pipe connection wall than the rear cylinder bank;

and

ends of exhaust pipes connected to the rear cylinder bank are connected to the exhaust pipe connection wall at positions more distant than positions to which ends of exhaust pipes connected to the front cylinder bank are connected.

4. The exhaust system according to claim 1, wherein

the front cylinder bank is farther from the exhaust pipe connection wall than the rear cylinder bank;

and

exhaust pipes connected to the rear cylinder bank have intermediate portions that intersect.

5. The exhaust system according to claim 1, wherein

the front cylinder bank is farther from the exhaust pipe connection wall than the rear cylinder bank;

and

exhaust pipes connected to the rear cylinder bank have intermediate portions that intersect; and

ends of exhaust pipes connected to the rear cylinder bank are connected to the exhaust pipe connection wall at positions more distant than positions to which ends of the exhaust pipes connected to front cylinder bank are connected.

6. The exhaust system according to claim 1, wherein the mufflers are connected to positions on the muffler connection walls that are higher than a center of the saddle-ride vehicle in a vertical direction.

7. The exhaust system according to claim 1, wherein the muffler connection walls are curved convexly toward an outside of the saddle-ride vehicle and the mufflers are connected to positions on the muffler connection walls that are higher than a maximum projection of the saddle-ride vehicle in a width direction.

8. The exhaust system according to claim 1, wherein the chamber is behind a pivot shaft serving as a center of rotation of a support member that swings and supports a rear wheel of the saddle-ride vehicle in a vertical direction.

9. The exhaust system according to claim 8, wherein the rear wall of the chamber is opposed to the rear wheel.

10. A saddle-ride vehicle comprising the exhaust system according to claim 1.

11. A saddle-ride vehicle comprising the exhaust system according to claim 2.

12. A saddle-ride vehicle comprising the exhaust system according to claim 4.