Intake system including a resonance chamber

Details Intake system including a resonance chamber Intake system including a resonance chamber

2007-06-05

2007-06-05

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

C123S184560, C123S184570

Reexamination Certificate

active

11236491

ABSTRACT:
In an intake system for an engine incorporated with a resonance chamber (32), a variable communication unit (50) for controlling the communication between an intake passage with the resonance chamber comprises an outer tube (51) having an open axial end (51a) and an opening (51b) defined in a circumferential wall thereof for communication with the resonance chamber and an inner tube (52) rotatably and coaxially received in the outer tube, the inner tube being provided with a communication inlet port (52a) at an axial end on a same side as the axial end of the outer tube and an opening (52b) in a circumferential wall thereof for defining a communication outlet port (50a) jointly with the opening in the outer circumferential wall of the outer tube. The openings of the inner tube and outer tube are configured such that at least one of a distance (L) between the inlet and outlet ports of the communication passage and an opening area (S) of the communication outlet port changes in relation with a relative rotational angle between the inner tube and outer tube. Thereby, the intake system can be formed as a highly compact unit and requires little power to operate.

REFERENCES:
patent: 2894497 (1959-07-01), Bolles, Jr.
patent: 4646689 (1987-03-01), Katsumoto et al.
patent: 4765286 (1988-08-01), Lyjak et al.
patent: 5870988 (1999-02-01), Fujimori et al.
patent: 2003/0213456 (2003-11-01), Klotz et al.
patent: 3-29581 (1991-06-01), None
patent: 9-264143 (1997-10-01), None

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