Multiple frequency Helmholtz resonator

Details Multiple frequency Helmholtz resonator Multiple frequency Helmholtz resonator

2006-06-06

2006-06-06

Nguyen, Tu M. (Department: 3748)

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

C123S184560, C181S214000, C181S219000

Reexamination Certificate

active

07055484

ABSTRACT:
The tunable resonator is coupled to the engine speed control such that the resonator is set to a different frequency range when the engine speed is changed. The frequency range is changed by opening and closing necks and/or changing the effective volume of the resonator.

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