초록 ▼

A composite check valve and positively closing electromagnetic solenoid valve, particularly such a valve for regulating the introduction of secondary air into the exhaust stream of an internal combustion engine at selected times during the operation of the engine. The valve comprises an inlet port,

A composite check valve and positively closing electromagnetic solenoid valve, particularly such a valve for regulating the introduction of secondary air into the exhaust stream of an internal combustion engine at selected times during the operation of the engine. The valve comprises an inlet port, an outlet port, a first valve element movable between open and closed positions for nominally regulating the flow of a fluid between the inlet and outlet ports, and an electromagnetic solenoid having a closure element for overriding the first element. The rigid disk or closure element can function by seating against the same seat as the first element, or by “latching”the first element in its closed position. The disclosed embodiment is a flap valve which is modified by superimposing a rigid, movable valve disk over the flap. The rigid disk is connected to the solenoid armature and is movable between an override (closed) position and a disengaged (open) position when the solenoid is energized. The rigid disk may also limit the opening of the flap to regulate the rate of fluid flow through the valve.

대표청구항 ▼

A composite check valve comprising: an inlet port; an outlet port; a flow passage between said inlet port and said outlet port; a seat having an upstream side in fluid communication with said inlet port and a downstream side in fluid communication with said outlet port, said seat defining an apertur

A composite check valve comprising: an inlet port; an outlet port; a flow passage between said inlet port and said outlet port; a seat having an upstream side in fluid communication with said inlet port and a downstream side in fluid communication with said outlet port, said seat defining an aperture providing fluid communication between said upstream side and said downstream side; a first valve having a flap with obverse first and second sides, said flap being deformable between an open position for providing fluid communication between said inlet port and said outlet port, said first side of said flap being displaced from said seat in said open position, and a closed position for preventing such communication, said first side of said flap being substantially against said seat and substantially blocking flow through said aperture in said closed position; an electromagnetic solenoid having a portion being located in said flow passage, said solenoid having electrical winding defining a central magnetic flux axis and a plurality of magnetic segments, said magnetic segments including an armature and a pole piece adjacent said armature, said armature being physically translatable within a portion of said solenoid electrical winding along said flux axis relative to said pole piece; a translatable closure element attached to and moveable with said armature, said closure element being positioned between said flap of said first valve and said outlet port, translation of said closure element being independent of said deformability of said flap of said first valve, said closure element being selectively engageable with said flap of said first valve for maintaining said flap in said closed position and preventing said deformation of said flap; and energization of said electrical winding being effective to cause translation of said armature and said closure element.