Internal-combustion engines – Valve – Valve head cooperates with manifold
Patent
1982-06-25
1984-08-21
Feinberg, Craig R.
Internal-combustion engines
Valve
Valve head cooperates with manifold
123306, F02B 3100, F02M 3510
Patent
active
044663978
ABSTRACT:
A helically-shaped intake port comprising a helical portion formed around an intake valve and a substantially straight inlet passage portion tangentially connected to the helical portion. A bypass passage is branched off from the inlet passage portion and connected to the helical portion. A rotary valve is arranged in the bypass passage and actuated by a vacuum operated diaphragm apparatus. The rotary valve is opened when the amount of air fed into the cylinder of an engine is increased beyond a predetermined value. The rotary valve comprises a valve holder, a valve shaft rotatably supported by the valve holder, and a valve body formed in one piece on the valve body and extending across the bypass passage. The valve shaft and the valve body are made of a polymer such as a rubber or synthetic resin.
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Isogai Kiyoshi
Kato Shin-ichi
Koga Ituo
Motosugi Katsuhiko
Takita Naka
Feinberg Craig R.
Toyota Jidosha Kogyo Kabushiki Kaisha
Wolfe W. R.
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