초록 ▼

A wastegate valve for use with turbocharged engines. The wastegate valve vents exhaust gasses upstream of the turbocharger high pressure turbine to reduce turbocharger speed and associated boost pressure. The wastegate valve includes a piston attached to a poppet valve and movable within a housing.

A wastegate valve for use with turbocharged engines. The wastegate valve vents exhaust gasses upstream of the turbocharger high pressure turbine to reduce turbocharger speed and associated boost pressure. The wastegate valve includes a piston attached to a poppet valve and movable within a housing. The housing receives pressurized intake gasses at a side of the piston to actuate the popper valve between open and closed positions. A diaphragm is sealingly disposed between the piston and housing. The housing includes mechanical stop means to limit the piston travel, thereby reducing flexure of the diaphragm. Additionally, the diaphragm is disposed in the housing in such a way that the diaphragm flexes between reduced peak compressive and tensile stresses.

대표청구항 ▼

A bypass valve, comprising: a housing; a manifold adapted for containing pressurized gas therein; a piston movably disposed in said housing, said piston defining first and second chambers in said housing and being actuable between first and second positions; a first sealing member connected to said

A bypass valve, comprising: a housing; a manifold adapted for containing pressurized gas therein; a piston movably disposed in said housing, said piston defining first and second chambers in said housing and being actuable between first and second positions; a first sealing member connected to said piston, said first sealing member being adapted for sealing against an opening of said manifold; an annular diaphragm connected between said piston and said housing to seal between said first and second chambers, said annular diaphragm flexing as said piston is actuated between said first and second positions; said annular diaphragm being pre-formed to define an outer annular portion adapted for connecting to said housing, an inner annular portion adapted for connecting to said piston and a middle portion generally U-shaped in cross-section arranged between said outer annular portion and said inner annular portion; said annular diaphragm flexing uniformly between a first position in which said middle portion is in compression and a second position in which said middle portion is in tension.