EP 0674097 A1 19950927 - Active exhaust gas muffler.
Title (en)
Active exhaust gas muffler.
Title (de)
Aktiver Abgasschalldämpfer.
Title (fr)
Silencieux actif de gaz d'échappement.
Publication
Application
Priority
IT TO940109 A 19940222
Abstract (en)
An active muffler (1) wherein a metal casing (3) defines a parallelepiped inner cavity (8) divided into a first (8a) and second (8b) chamber by a rectangular panel (13) of material impervious to heat. The panel (13) presents a central through opening (19), the peripheral edge of which contacts the peripheral edge (30) of the cone of a loudspeaker (6) housed in the first chamber (8a) and supplied by an electronic active noise reducing system. The second chamber (8b) houses a passive muffler (35) supplied with the exhaust gas produced by a vehicle engine. <IMAGE>
IPC 1-7
IPC 8 full level
F01N 1/06 (2006.01); G10K 11/178 (2006.01)
CPC (source: EP US)
F01N 1/065 (2013.01 - EP US); G10K 11/1785 (2017.12 - EP US); G10K 11/17857 (2017.12 - EP US); G10K 11/17861 (2017.12 - EP US); G10K 11/17883 (2017.12 - EP US); G10K 2210/121 (2013.01 - EP); G10K 2210/1282 (2013.01 - EP); G10K 2210/12822 (2013.01 - EP); G10K 2210/3214 (2013.01 - EP); G10K 2210/3227 (2013.01 - EP); G10K 2210/32271 (2013.01 - EP)
Citation (search report)
- [XAY] WO 9115666 A1 19911017 - ACTIVE NOISE & VIBRATION TECH [US]
- [Y] WO 9305282 A1 19930318 - ACTIVE NOISE & VIBRATION TECH [US]
- [Y] WO 9309334 A1 19930513 - NOISE CANCELLATION TECH [US]
- [Y] PATENT ABSTRACTS OF JAPAN vol. 17, no. 263 (M - 1415) 24 May 1993 (1993-05-24)
- [A] PATENT ABSTRACTS OF JAPAN vol. 18, no. 21 (P - 1674) 13 January 1994 (1994-01-13)
Designated contracting state (EPC)
DE ES FR GB SE
DOCDB simple family (publication)
EP 0674097 A1 19950927; IT 1267402 B1 19970205; IT TO940109 A0 19940222; IT TO940109 A1 19950822
DOCDB simple family (application)
EP 95102257 A 19950217; IT TO940109 A 19940222