Internal-combustion engines – Multiple cylinder
Patent
1985-11-07
1987-06-09
Feinberg, Craig R.
Internal-combustion engines
Multiple cylinder
F02B 2700
Patent
active
046712178
ABSTRACT:
An intake system for a multicylinder internal combustion engine comprises an intake passage including a common passage portion opening to the atmosphere, first and second volume chambers communicated with each other by a communicating passage, and a plurality of discrete passage portions branching from the first volume chamber and respectively connected to the cylinders. The second volume chamber is arranged to communicate the discrete passage portions with each other at a portion downstream of the first volume chamber and the common passage portion is communicated to one of the first and second volume chambers. An on-off valve is disposed at each junction of the second volume chamber with the discrete passage portions to move between an open position and a closed position in which the effective cross-sectional area of the junction is narrowed to an extent sufficient to prevent reflection of the pressure wave generated in the discrete passage portion at the second volume chamber. The on-off valves are moved to the open position as the engine speed increases at least during heavy load operation of the engine.
REFERENCES:
patent: 2862490 (1958-12-01), Trisler
patent: 3814069 (1974-06-01), Croft et al.
patent: 4445480 (1984-05-01), Inoue et al.
patent: 4565166 (1986-01-01), Takeda
patent: 4574748 (1986-03-01), Inoue et al.
Patent Abstracts of Japan, vol. 6, No. 204, (M-164), [1082], Oct. 15, 1982.
Hinatase Fumio
Hitomi Mitsuo
Yuzuriha Yasuhiro
Feinberg Craig R.
Ferguson Jr. Gerald J.
Hoffman Michael P.
Malamud Ronni S.
Mazda Motor Corporation
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