EP 1090224 A1 20010411 - PIPE WITH A VARIABLE CROSS SECTION
Title (en)
PIPE WITH A VARIABLE CROSS SECTION
Title (de)
ROHR MIT VERÄNDERBAREM QUERSCHNITT
Title (fr)
TUBULURE A SECTION VARIABLE
Publication
Application
Priority
- DE 19704230 A 19970205
- EP 9800616 W 19980205
Abstract (en)
[origin: WO9835156A1] The invention relates to a suction pipe (10) with a variable cross section, in particular for insertion into the intake section of an internal combustion engine. To this end, a variable element (20) is provided to narrow the pipe cross section over a long segment when actuated. The invention seeks to keep the flow channel as narrow as possible, according to the operating state of the motor, thus reducing the bass portion in the intake noise. The variable element is preferably activated by low pressure which is obtained in the further course of the suction channel.
IPC 1-7
IPC 8 full level
F02B 27/02 (2006.01)
CPC (source: EP)
F02B 27/021 (2013.01); F02B 27/0236 (2013.01); F02B 27/0294 (2013.01); F05C 2225/08 (2013.01); Y02T 10/12 (2013.01)
Citation (search report)
See references of WO 9835156A1
Designated contracting state (EPC)
DE ES FR GB IT NL SE
DOCDB simple family (publication)
WO 9835156 A1 19980813; CA 2280917 A1 19980813; EP 1090224 A1 20010411
DOCDB simple family (application)
EP 9800616 W 19980205; CA 2280917 A 19980205; EP 98908059 A 19980205