Honda Motor Co., Ltd.

Yoshinobu Ozaki

Bruno Conte

Masashi Koyanagi

Takeshi Shimura

Kazuhisa Takemoto

Masahiko Nakatsuka

Kenji Watanabe

Ryoji Imai

Shigetaro Okano

Akihiko Hamazaki

Mizuki Fujiwara

In a saddle-ride type vehicle in which an intake device is arranged at a position covered by a fuel tank from above, the intake device including: an air cleaner; a connecting tube having an upstream end thereof connected to the air cleaner; a throttle device including a throttle valve and connected to a downstream end of the connecting tube; and a resonator, a curved portion bulged upward and curved in a chevron shape is formed in the connecting tube, and the resonator arranged between the fuel tank and the connecting tube is connected to the connecting tube on the air cleaner side further than a top portion of the curved portion as seen in a side view of the vehicle.

Saddle-ride type vehicle

In a saddle-ride type vehicle in which a cleaner case of an air cleaner is configured with first and second case half bodies coupled to each other and arranged in a vehicle width direction, and is arranged in a space surrounded by a vehicle body frame, a first case half body is provided with: a cleaner element insertion/removal port opened outward so as to permit insertion and removal of a cleaner element therethrough; a purified air outlet connected with a connecting tube for guiding purified air to an engine body side; and an outside air suction port for introducing air from an outside into the cleaner case.

Air cleaner structure in saddle-ride type vehicle

In a saddle-ride type vehicle in which an air cleaner is arranged inward in a vehicle width direction of at least a pair of left and right main frames and arranged below a riding seat, a cleaner case for the air cleaner is configured long in a longitudinal direction of the vehicle and has a cleaner case main portion storing therein a cleaner element, and a connecting tube connection portion extending forward from the cleaner case main portion so as to be connected to a connecting tube. A pair of left and right side covers covering the cleaner case from opposite sides in the vehicle width direction are supported by side cover supporting portions that are provided on left and right opposite side walls of the cleaner case main portion and the connecting tube connection portion.

An air cleaner positioned above a cylinder head is connected to an intake port of the cylinder head through a connecting tube, a throttle device, and an insulator. An insulator attachment surface is formed in a rear-side wall of a cylinder head such that the insulator attachment surface is inclined to extend in a forward direction while extending upwardly. An insulator is formed in such an arc shape in a side view wherein a flow direction of air flowing inside the insulator is directed more in a forward direction as the air approaches the cylinder head. A throttle device having an intake passage thereof directed in a vertical direction is connected to the insulator. A connecting tube is formed to curve in such a shape that the connecting tube has its upstream end opened in a forward direction and is rounded outwardly in an obliquely rearward direction.

Motorcycle

In a motorcycle including an engine equipped with an inlet system, a crankcase and a cylinder block; and a fuel tank which supplies fuel to the engine, an evaporation system is formed in a compact manner using the layout space above the crankcase. The evaporation system includes a canister which temporarily traps evaporated fuel evaporated inside the fuel tank; a purge device which introduces the evaporated fuel trapped in the canister into the inlet system; and a fresh air filter which filters air introduced to the canister during a purging operation for making the inlet system suction the evaporated fuel. In such evaporation system, the canister is disposed in the rear of the cylinder block and above the crankcase, and the air filter is disposed between the cylinder block and the canister.

Evaporation system for motorcycle, and motorcycle incorporating the same

A vehicle can include a pair of right and left main frames extending from a head pipe of a front portion to a rear direction. An engine is disposed below the main frames, a fuel tank is disposed above the main frames, and an air cleaner is disposed above the engine E and adjacent to the fuel tank. The air cleaner is disposed in the front direction side of the fuel tank, and a part of the air cleaner is disposed in the lower direction side of the fuel tank. An inner side portion disposed between the pair of right and left main frames and outer side portions disposed so as to bulge to the outer side in the width direction of the vehicle of the pair of right and left main frames are connected.

Straddle type vehicle

An intake air routing device for an engine having a plurality of cylinders, includes a pair of half case bodies forming an air chamber, an air filter arranged in the air chamber and configured to purify outside air received via an intake duct, and a plurality of intake passages extending from the air chamber. The plurality of intake passages are connected with respective intakes ports of the engine. A partition plate is disposed in the air chamber, and is formed separately from the case bodies. The partition plate is arranged in the air chamber such that it extends in the air chamber by a predetermined length in a direction intersecting with a direction where the intake passages are lined up so as to partition the intake passages from each other. Such intake air routing device reduces intake interference while maintaining a small size of the intake air routing device.

Intake air routing device for an engine, and engine incorporating same

An engine balancer device is provided that can prevent an increase in the number of component parts and the enlargement of an engine. The balancer weight includes a primary balancerrotated at the same speed as, and in a counter direction to a crankshaftand a coupling balancer for suppressing moment force resulting from the reciprocative weight of the engine. The coupling balancer is integrally provided on a driven gearfor transmitting rotation of the crankshaftto the primary balancer

Engine balancer device

A saddle-ride vehicle includes an engine with a front cylinder extended forward and diagonally upward from a crankcase. The engine is mounted between a front wheel and a rear wheel. A space gradually vertically extended forward is provided between a fuel tank arranged on the upside of the front cylinder and a front head cover provided to an upper part of the front cylinder. A radiator upstream water passage extended backward from an upper part of a radiator is provided in front of the front cylinder and is arranged in the space. The radiator upstream water passage is covered with a front overhead cover attached to the front cylinder. With this configuration, vehicle body components are not exposed, thereby protecting the vehicle body components. In addition, the appearance of the vehicle is efficiently enhanced.

Saddle-ride vehicle

An internal combustion engine and a transmission are supported by a saddle-ride type vehicle body having a front wheel in a front portion thereof. An oil cooler is installed without interference with other parts such as, for example, an exhaust pipe and the front wheel. Further, the distance between a water pump and the oil cooler is made shorter to shorten the length of a cooling water pipe. The power unit includes a crank shaft, an output shaft disposed in a rear portion of the power unit to output torque produced by the crank shaft to the exterior through a transmission, a water pump is adapted to be rotated with the torque transferred thereto from the crank shaft, and an oil cooler mounted on a rear surface of the power unit in a vehicle advancing direction below the output shaft and at a position lower than the crank shaft.

Growing community of inventors

Wako, Japan

Yoshinobu Ozaki