Emission gas recycling equipment having butterfly valve

Details Emission gas recycling equipment having butterfly valve Emission gas recycling equipment having butterfly valve

2007-06-26

2007-06-26

Bastianelli, John (Department: 3753)

Internal-combustion engines

Engine speed regulator

Specific throttle valve structure

C251S306000

Reexamination Certificate

active

11640408

ABSTRACT:
Emission gas recycling equipment includes a passage for recycling a part of an emission gas and a control valve for controlling an amount of the part of the emission gas. The control valve includes: a housing having a pipe portion; a butterfly valve accommodated in the pipe portion rotatable in a first direction and a second direction; a seal ring for sealing a clearance; and valve open/close operation means for stopping the butterfly valve at the valve full close position after the valve open/close operation means operates the butterfly valve to open and to close equal to or more than one cycle across the valve full close position at the time when the engine stops or after the engine stops.

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Korean Office Action dated Aug. 31, 2006 issued in counterpart Korean Application No. 10-2005-0013333 with English translation.

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