Yamaha Motor Patente

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A saddle-ride type vehicle (1) comprises a head pipe (21) and a front cover assembly (30). The front cover assembly (30) includes a plurality of cover members (31, 32) and covers the head pipe (21). The front cover assembly (30) includes a plurality of securing portions (61a, 62a) for attaching a separate cover (40) to the front cover assembly (30), the separate cover (40) being formed separately from the front cover assembly (30). The securing portions (61a, 62a) include a first securing portion (61a) and a second securing portion (62a). A border (50) of the cover members (31, 32) is disposed between the first securing portion (61a) and the second securing portion (62a).

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A second silencer (24) is separate from a first silencer (22). A first exhaust pipe (21) connects an exhaust port and the first silencer. A connecting pipe portion (23) connects the first silencer (22) and the second silencer (24). A first expansion chamber (31) of the first silencer is located downstream from the first exhaust pipe in the exhaust flow. A second expansion chamber (32) of the first silencer is partitioned from the first expansion chamber. The second expansion chamber (32) is located downstream from the first expansion chamber (31). The connecting pipe portion includes a second exhaust pipe (28), an exhaust control valve (29), and a third exhaust pipe (30). The second exhaust pipe (28) is connected to the first expansion chamber (31). The exhaust control valve (29) is disposed on the second exhaust pipe (28). The exhaust control valve controls the flow passage area of the second exhaust pipe. The third exhaust pipe (30) is connected to the second expansion chamber (32).

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There is provided a muffler which is capable of sufficiently reducing influence from heat generated in a catalyst. There is also provided a saddle type vehicle including the muffler. A saddle type vehicle 10 includes an engine 14 and a muffler 44. The muffler 44 includes an exhaust pipe 46, a silencer 48 and a catalyst 52. The silencer 48 includes a main body portion 68, a first separator 70 and a second separator 72. Inside the main body portion 68, a first expansion chamber X1 is on a rearward side of the second separator 72, a second expansion chamber X2 is on a forward side of the first separator 70, and a third expansion chamber X3 is between the first separator 70 and the second separator 72. The catalyst 52 is held by the exhaust pipe 46 inside the second expansion chamber X2. The exhaust pipe 46 passes through the through-hole 70a without making contact with the first separator 70, and is supported by the second separator 72. Exhaust gas from the engine 14 flows through the exhaust pipe 46, the first expansion chamber X1, the second expansion chamber X2 and the third expansion chamber X3 in this order, and then is released from the main body portion 68.

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The present invention relates to a straddle-type vehicle (1) comprising: a front cover assembly (2a) comprising a first front cover (10) and a second front cover (11) disposed rearward of the first front cover (10); and a headlight (9) installed in the front cover assembly (2a), wherein a first air inlet (12) is formed in the first front cover (10); a second air inlet (13) is formed in the second front cover (11), the second air inlet (13) having a second front opening (13a) and a second rear opening (13b) for directing cooling air to in-vehicle parts; and when seen in a front view, the first air inlet (12) has a larger opening area than the second rear opening (13b).

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In a motorcycle, a seat (114) is supported by a pair of right and left sub-frames. The pair of side covers(200) covers at least part of a pair of upper frame pipes from outside. The pair of side covers (200) includes a pair of grip covers (220) and a pair of front covers (210). The pair of side covers (200) is fixed to the pair of upper frame pipes, respectively. The pair of front covers (210) is respectively fixed to the pair of grip covers (220) to extend forward from the front ends of the pair of grip covers (220). Each grip cover (220) has a projection (220P) arranged outside the seat (114) in the width direction and has a lower recess (220C) at the lower surface of the projection (220P)

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The present invention relates to a straddle-type vehicle (1) comprising a seat portion (2) configured to move between a first position and a second position, the first position being a position for riding, a lid portion (3) located rearward of the seat portion (2) and configured to move between a first position and a second position, a first contact portion formed on an upper surface of the seat portion and a second contact portion formed on a lower surface of the lid portion, wherein the first contact portion is arranged to contact with the second contact portion when the seat portion (2) and the lid portion (3) are in their respective first positions, wherein when the seat portion (2) and the lid portion (3) are in their respective first positions, a lower surface of the lid portion (3) located behind the second contact portion is positioned higher than the first and second contact portions; and a section of the upper surface of the seat portion (2) forming the first contact portion is inclined upwards and rearwards.

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A brake system (6) includes: a front brake mechanism (30); a rear brake mechanism (40); a front brake wire (74); a rear brake wire (75); a link (81); a support (82); and an interlocking brake wire (72). The link (81) is rotatable around a fulcrum on one end thereof as measured in a longitudinal direction thereof. The support (82) elastically supports the link (81) at the fulcrum. The interlocking brake wire (72) is connected with the link (81) so as to pull the front brake wire (74) and rear brake wire (75). The front brake wire (74), the interlocking brake wire (72), and the rear brake wire (75) are connected with the link (81) in this order, starting from the end of the link with the support (82), as measured in a longitudinal direction of the link (81).

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A starter-generator (SG) is provided that is able to efficiently start an engine without causing an increase in the size of a device. The starter-generator (SG) is configured to, at a time of engine start, act as a starter motor that causes a crankshaft of an engine to rotate from a predetermined rotation start position with an approach run given thereto, and after the engine start, act as a generator. The starter-generator (SG) includes a controller (70) for controlling a driver (60) in such a manner that, at a time of engine start, an application voltage applied to a winding is gradually raised such that the application voltage becomes a predetermined voltage that is higher than a terminal voltage of a battery (B) at a time point when the number of rotations of the engine reaches a predetermined first number of rotations, and the application voltage thus raised is maintained at least until the engine is started.