Exhaust flow control valve and two-stage turbocharging system equipped with it

Japanese Patent JP6358690

B2

An exhaust-flow-rate control valve 1 for controlling a flow rate of exhaust gas flowing through an exhaust flow passage includes: a valve rod 2; a valve body 3 having a flat plate shape and configured to rotate about the valve rod 2; and a valve housing 4 having a cylindrical shape and defining a part of the exhaust flow passage inside the valve housing. A valve seat surface 41 extending along a direction intersecting with an axial direction of the exhaust flow passage and being configured to make contact with an outer peripheral portion 31 of the valve body 3 in a fully-closed state in which an opening degree of the valve body 3 is zero degree, and a flow passage surface 42 extending along the axial direction of the exhaust flow passage and defining a passage region R through which the exhaust gas passes between the flow passage surface 42 and the outer peripheral portion 31 of the valve body 3 in a valve-open state in which the opening degree of the valve body 3 is greater than zero degree are formed on an inner peripheral surface of the valve housing 4. The passage region R of exhaust gas increases slowly while the valve body transitions from the fully-closed state to a predetermined valve-open state in which the separation distance between the valve body 3 and the end portion 42b of the flow passage surface 42 is shortest.

WO/2007/098562	DUAL SEAL VALVE
JP6603478	Shutoff valve

Anritsu
Hiroshi Suzuki

JP2017508886A

July 18, 2018

March 30, 2015

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Mitsubishi Heavy Industries Engine & Turbocharger Co., Ltd.

F16K1/18; F02B37/013; F02B37/18

JP2007505257A
JP2014231804A
JP5296067A
JP2004263723A
JP60167269U

WO2009069240A1
WO2016157364A1

Seishin ip patent business corporation

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