Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Ohtsuka Poly-Tech Co., Ltd.

Yasuo Terada

Yoshitaka Uchida

Dai Kataoka

Takao Tomita

Makoto Fujikubo

Takuya Warashina

Takumi Tottori

Chikashi Takiguchi

Hideki Toyota

Daisuke Sugio

Masahiro Akiba

Kazuyuki Kosei

Ryota Takahashi

Yuhei Muraki

Yohei Nakamura

Hiroyuki Yokoyama

Kayoko Takeichi

Yasuhiko Nakano

An exhaust system control apparatus for the exhaust of an internal combustion engine which is particularly useful on two-cycle engines. The exhaust system includes a subsidiary chamber connected to the normal engine exhaust passage with a valve for opening and closing communication between the chamber and exhaust passage to change the pressure wave at the engine cylinder exhaust port to provide optimum performance at high and low speeds. The chamber valve is operated rapidly by a pneumatic actuator supplied with compressed air from one or more of the sources disclosed, namely, a belt driven or electric air compressor and piston and cylinder devices extending between or forming the suspension components of a two wheeled vehicle. A pneumatic valve is operated by engine speed sensing means to supply or release the pressurized air to the actuator at a predetermined engine speed.

Exhaust system control apparatus in an internal combustion engine

Exhaust system control apparatus for internal combustion engine having an exhaust line and a branch line thereon, and an opening and closing valve on said branch line adapted to open when the engine operates at low speed and to close when the engine operates at high speed. The ratio between the cross-sectional areas of the branch line and the exhaust line is about 0.6 to 0.8.

Control system of exhaust for internal combustion engine

Growing community of inventors

Miyoshi, Japan

Yasuo Terada