Apparatus and method for controlling exhaust pressure
AssigneeJacobs Vehicle Systems, Inc.
InventorsZdenek Meistrick, Todd Perkins
Life of this patent
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Abstract
An apparatus and method of controlling exhaust pressure in an internal combustion engine are disclosed. In one embodiment the apparatus may comprise: a housing; a valve disposed in the housing; an orifice formed in the valve, wherein the orifice defines a gas flowpath through the valve; and a shaft slidably disposed in a bore formed in the valve, the shaft movable between a first position, in which gas is substantially prevented from flowing through said orifice, and a second position in which gas is permitted to flow through said orifice. The position of the shaft may be selectively varied in response to an actuating force.
Claims27
A method of controlling exhaust pressure in an engine exhaust system having a first rotatable butterfly valve adapted to rotate about an axis of rotation and to selectively restrict exhaust flow through the exhaust system, a passage for selectively permitting exhaust flow through said first valve, a bore formed in said first rotatable butterfly valve coaxial with the axis of rotation, and a second valve for selectively controlling exhaust flow through the passage, wherein at least a portion of said second valve is disposed within the bore formed in said first rotatable butterfly valve, said method comprising the steps of:
- closing the first valve;
- generating exhaust pressure in the exhaust system;
- and
- opening the second valve in response to the generation of exhaust pressure in the exhaust system.
A method of controlling exhaust pressure in an engine having an exhaust system, a first rotatable butterfly valve disposed downstream of the exhaust system and adapted to rotate about an axis of rotation, a passage extending through said first rotatable butterfly valve, a bore formed in said first rotatable butterfly valve coaxial with the axis of rotation, a second valve having a first end adapted to control exhaust flow through said passage and a second end adapted to receive an actuation force for said second valve, wherein at least a portion of the first end of said second valve is disposed within the bore formed in said first rotatable butterfly valve, said method comprising the steps of:
- closing the first rotatable butterfly valve;
- applying exhaust pressure to the first end of the second valve in a direction substantially orthogonal to an actuation direction of the second valve;
- and applying an actuation force to the second end of the second valve to open the second valve and control the exhaust pressure in the exhaust system.
An apparatus for controlling exhaust pressure in an engine exhaust system comprising:
- a first rotatable butterfly valve disposed in the exhaust system and adapted to rotate about an axis of rotation;
- a bore formed in said first rotatable butterfly valve coaxial with the axis of rotation;
- a passage extending through said first rotatable butterfly valve and intersecting said bore;
- and
- a second valve incorporated into said first rotatable butterfly valve, said second valve having a first end slidably disposed in said bore and adapted to control exhaust flow through said passage and a second end adapted to receive an actuation force for said second valve.
An apparatus for controlling exhaust pressure in an internal combustion engine having an exhaust system, said apparatus comprising:
- a first valve disposed in the exhaust system, said first valve adapted to rotate about an axis of rotation;
- a bore formed in said first valve coaxial with the axis of rotation;
- a passage extending from an upstream to a downstream side of said first valve;
- and
- a second valve having at least a portion disposed in said valve bore.
An apparatus for controlling exhaust pressure in an internal combustion engine having an exhaust system including a longitudinally extending exhaust pipe, said apparatus comprising:
- a first rotatable butterfly valve disposed in the exhaust system and having a bore formed along an axis of rotation;
- a second valve disposed within said first rotatable butterfly valve bore;
- and
- means for opening the second valve in a direction substantially orthogonal to the longitudinally extending exhaust pipe.
An apparatus for controlling exhaust pressure in an internal combustion engine, the apparatus comprising:
- a housing;
- a first valve disposed in said housing;
- an orifice formed in said first valve, wherein said orifice defines an exhaust flowpath through said valve;
- and
- a second valve comprising a shaft slidably disposed in a bore formed in said first valve, wherein said bore intersects with said orifice.
Dependencies are inferred from the claim text.