Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1997-09-03
1998-09-15
Okonsky, David A.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
F02M 3510
Patent
active
058064800
ABSTRACT:
An air intake system for an internal combustion engine comprises an air pipe having at least one communication aperture in a pipe wall and opposite ends, and a resonator formed substantially coaxially about and spaced from an outer circumference of the air pipe and disposed substantially over the entire length of the air pipe. The resonator is connected at the opposite ends to the air pipe. The air intake system further comprises a flexible inner bellows formed at a portion of the air pipe and a flexible outer bellows formed at a portion of the resonator substantially overlying the inner bellows. The material for molding the resonator is changed at an intermediate portion in a longitudinal direction of the resonator from a hard resin to a soft resin, with at least the outer bellows being formed from a soft resin.
REFERENCES:
patent: 4538556 (1985-09-01), Takeda
patent: 4889081 (1989-12-01), Ozaki
patent: 4938177 (1990-07-01), Hasegawa
patent: 5002021 (1991-03-01), Nakata et al.
patent: 5307767 (1994-05-01), Schutz
patent: 5495834 (1996-03-01), Rutschmann et al.
patent: 5572966 (1996-11-01), Doddy et al.
Kasugai Joji
Maeda Ituro
Okonsky David A.
Toyoda Gosei Co., Inc.
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