Internal-combustion engines – Precombustion and main combustion chambers in series – Having combustible mixture forming means
Patent
1980-11-20
1981-10-13
Miles, Tim R.
Internal-combustion engines
Precombustion and main combustion chambers in series
Having combustible mixture forming means
123336, 123442, 123584, 137607, 251305, 261 23B, 261DIG50, F02B 1910
Patent
active
042942055
ABSTRACT:
A carburetor for a multi-cylinder internal combustion engine which has for each cylinder a main combustion chamber defined above the piston in the cylinder and a sub-combustion chamber defined above the main combustion chamber and communicating with the latter through a torch nozzle. The carburetor has a main intake passage and a sub-intake passage for supplying a comparatively lean mixture and a comparatively rich mixture to the main and sub-combustion chambers respectively. The carburetor has a single throttle valve shaft extending across the main and sub-intake passages with a main throttle valve and a sub-throttle valve mounted on the valve shaft and disposed in the main and sub-intake passages respectively. One of the main and sub-throttle valves has an outside diameter smaller than the inside diameter of the associated intake passage so that the ratio of the open areas of the main and sub-intake passages is not constant as the throttle shaft is operated. Thereby, the ratio of weight of air introduced into the sub-combustion chamber to the weight of air introduced into the main combustion chamber can be controlled in accordance with the load condition of the engine.
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Iiyama Masahiko
Naito Kenji
Sanka Tsugio
Honda Giken Kogyo Kabushiki Kaisha
Miles Tim R.
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