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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsTakao Tomita, Takumi Tottori, Yasuo Terada, Hideki Toyota, Masahiro Akiba
Estimating the term…
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.
An exhaust system control apparatus for an internal combustion engine, said apparatus comprising:
An exhaust system control apparatus for an internal combustion engine with an exhaust passage, a subsidiary chamber communicating with the exhaust passage and a chamber valve for opening or closing the communication between the subsidiary chamber and the exhaust passage, the improvement comprising, an air pressure actuator means connected to the chamber valve, an air pressure source means operatively connected to said actuator, a control valve means connected between said actuator means and pressure source means for supplying pressurized air to and releasing the pressurized air from said actuator means for rapidly opening and closing the chamber valve, and operating means responsive to engine speed to rapidly operate said control valve means at a predetermined speed to inturn rapidly operate said actuator means to open the chamber valve below said predetermined speed and close the chamber valve above said predetermined speed.
Dependencies are inferred from the claim text.