Title:
SILENCER
Document Type and Number:
WIPO Patent Application WO/2008/150024
Kind Code:
A1
Abstract:
A silencer exhibiting excellent silence characteristics for damping the delivery
sound over a wide range including the entire region of low frequency zone, intermediate
frequency zone, and high frequency zone without increasing the muffler volume.
In the silencer (1) where the inside space of a muffler shell (2) is partitioned
into a first chamber (3) and a second chamber (4) and a control valve (14) opening/closing
freely depending on the flow rate of exhaust gas is fixed to the outlet portion
(6b) of an inlet pipe (6) by means of a torsion coil spring (15), the second chamber
(4) is changed to a low frequency resonator chamber for dampingthe delivery sound
in the low frequency zone, an intermediate frequency resonator chamber for damping
the delivery sound in the intermediate frequency zone, and an expansion chamber
for damping the delivery sound in the high frequency zone by varying the opening
of the control valve (14) stepwise.
Inventors:
TOYOSHIMA YOUHEI (JP)
Application Number:
PCT/JP2008/060730
Publication Date:
December 11, 2008
Filing Date:
June 05, 2008
Export Citation:
Assignee:
CALSONIC KANSEI CORP (JP)
TOYOSHIMA YOUHEI (JP)
TOYOSHIMA YOUHEI (JP)
International Classes:
F01N1/02; F01N1/04; F01N1/08; F01N13/08
Foreign References:
| JP2006002712A | 2006-01-05 | |||
| JPS61186717U | 1986-11-21 | |||
| JPS5873919U | 1983-05-19 |
Attorney, Agent or Firm:
GOTO, Masaki (3-1 Kasumigaseki 3-chom, Chiyoda-ku Tokyo 13, JP)
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