Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tadashi Iijima0
Taisei Okubo0
Daisuke Kozuka0
Hideyuki Seiyama0
Shuuji Hori0
Date of Patent
February 14, 2012
0Patent Application Number
125213430
Date Filed
December 26, 2007
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An EGR valve device includes a valve housing of which inside exhaust gas passes through, a poppet valve as a valve body accommodated in the valve housing, and a hydraulic servo actuator for driving the poppet valve to be opened and closed. The hydraulic servo actuator is provided by a three-port or four-port servo valve.
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