Honda Giken Kogyo Kabushiki Kaisha

Toshihiko Suda

Shigeru Kodaira

Hajime Yamada

Noriyoshi Tsutsui

Tetsuya Nakayasu

Kenjiro Saito

Mitsuo Kusa

Masamoto Ito

Yoshiaki Hirakata

Seiji Yamaguchi

Koichi Hikichi

Hideo Ogura

Naohisa Okawada

The intake and exhaust control systems are operable in varying modes, according to the engine speed, by a single actuator. The intake control system includes an intake valve that allows a variable amount of air into an air cleaner depending on vehicle speed. The exhaust control system includes an exhaust control valve, and a primary and a secondary exhaust purifying system located downstream of the exhaust control valve. The flow into the exhaust purifying systems may also be controlled according to engine speed.

Intake and exhaust control systems for engine

A speedometer mounting structure in a motorcycle is provided which is capable of mounting the speedometer without deteriorating the design of the motorcycle. A handlebar holder is provided to secure a steering handlebar, on a fork support member for supporting a front fork of a motorcycle. The speedometer is mounted on the handlebar holder.

Speedometer mounting structure in motorcycle

A headlight includes a low-beam lamp arranged on a longitudinally extending center line of a vehicle body and left and right high-beam lamps arranged on the opposite sides of the low-beam lamp as viewed in plan. This arrangement permits the total reflection area of the reflecting portions of the left and right high-beam lamps can be increased. The lens of the low-beam lamp and the left and right high-beam lamps is integrally formed and largely curved toward the front side of the vehicle body, thereby suppressing an increase in the air resistance by the headlight. Accordingly, the brightness of the headlight can be increased without changing the rated powers of the bulbs of the low-beam lamp and the high-beam lamps. Further, by symmetrically arranging the left and right high-beam lamps with respect to the low-beam lamp, the illumination condition on the road surface by the high beam in the case of cornering to the left can be made similar to that in the case of cornering to the right.

Headlight for motorcycle

A combustion control apparatus for a spark ignition type 2-cycle internal combustion engine includes fresh air mixed with fuel in a combustion chamber which can be self-ignited at an ignition timing preferable for the operation of the internal combustion engine at least in a low load operation region to effect active thermal atmosphere combustion. When it becomes necessary to stop the internal combustion engine quickly, upon starting of the internal combustion engine again, the starting performance is high. A combustion control apparatus for a spark ignition type 2-cycle internal combustion engine includes fresh air mixed with fuel in a combustion chamber which can be self-ignited at least in a low load operation region. The exhaust path opening adjustment means is driven upon development of a stopping signal for the internal combustion engine, if the internal combustion engine speed is higher than a predetermined speed above idle, so that the exhaust path opening is higher than an opening at which self-ignition is impossible. When the internal combustion engine stopping signal is developed, when the internal combustion engine speed drops until it becomes lower than the predetermined speed, the exhaust path opening adjustment means is driven so that the exhaust path opening is controlled to an opening at which ordinary combustion is possible.

Combustion control apparatus for spark ignition type 2-cycle internal

Growing community of inventors

Saitama, Japan

Toshihiko Suda