Internal-combustion engines – Multiple cylinder
Patent
1979-03-21
1981-03-10
Phillips, Charles E.
Internal-combustion engines
Multiple cylinder
F02B 1500
Patent
active
042547474
ABSTRACT:
A multi-cylinder internal combustion engine having an intake manifold equipped with a variable venturi type carburetor. A secondary throttle valve is provided for each cylinder. Each of the secondary throttle valves is arranged in the respective manifold branch. An auxiliary intake passage is branched off from the collecting portion of the intake manifold and connected to a distribution channel formed in the cylinder head. Each of the intake ports is connected to the distribution channel via a corresponding channel branch which opens into the intake port at a position near the intake valve. A primary throttle valve is arranged in the auxiliary intake passage and opened in accordance with an increase in level of the load of an engine. The secondary throttle valves are opened after the opening degree of the primary throttle valve is increased beyond a predetermined opening degree.
REFERENCES:
patent: 3318292 (1967-05-01), Hideg
patent: 3717131 (1973-02-01), Chana et al.
patent: 3742922 (1973-07-01), Hisatomi et al.
patent: 3809032 (1974-05-01), Morris
patent: 3980060 (1976-09-01), Noguchi et al.
patent: 4064850 (1977-12-01), Nakagawa et al.
Motosugi Katsuhiko
Sekiya Setsuro
Sumiyoshi Masaharu
Phillips Charles E.
Toyota Jidosha Kogyo Kabushiki Kaisha
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