ISOLATION VALVE WITH FAST DEPRESSURIZATION FOR HIGH-PRESSURE FUEL TANK

WIPO Patent Application WO/2012/098460

A3

An isolation valve (20) includes a flow restrictor (50) disposed in a passage (56) and having a piston (52) with a first orifice (49) and a depressurization valve (50a) with a second orifice (50b). The valve (20) also includes a solenoid valve assembly (40) having a coil (46) that is selectively energized by a signal from a controller (14) and an armature (42) that is moveable between first and second positions to open and close the first orifice (49) and/or the second orifice (50b). When the coil (46) is energized, the armature (42) moves to the second position to allow vapor to flow through the first orifice (49), the depressurization valve (50a) selectively opens to allow vapor to flow through the first orifice (49), the second orifice (50b), or both. The two orifices (49, 50b) work together to provide controlled vapor flow.

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WO/2017/016737	INTERNAL COMBUSTION ENGINE AND METHOD FOR DETECTING A LEAK FROM A CRANKCASE AND/OR A TANK VENTILATION SYSTEM

PIFER DANIEL LEE (US)

PCT/IB2012/000079

October 18, 2012

January 20, 2012

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EATON CORP (US)
PIFER DANIEL LEE (US)

F02M25/08; B60K15/035; F16K39/02

US20010017160A1	2001-08-30
EP0713036A1	1996-05-22
EP2071217A1	2009-06-17
US20050217734A1	2005-10-06

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