Thermally compensated noise control device for a solenoid-actuated valve
First Claim
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1. A valve assembly for controlling fluid flow between a fluid supply source and fluid actuating device in a vehicle transmission, said assembly comprising:
- a housing having a supply port for connection with the fluid supply source, an element port for connection with the fluid actuating device, and a passageway communicating with said supply port and said element port;
a valve disposed within said passageway and moveable between positions which cause the element port to be either connected to said supply port or a vent port;
a valve seat means forming at least one valve seat in said passageway and having a central passage communicating therethrough;
electromagnetic means for producing a magnetic field when electrically energized;
a plunger operatively connected to said electromagnetic means having a longitudinal axis aligned with said central passageway to move said valve and act in conjunction with said valve and said valve seat means to effect the element connection to either said supply or vent port;
a damper slideably disposed within said passageway; and
said damper including means for expanding and contracting in response to the temperature of the fluid to allow gradual flow of fluid within said passageway to slow the velocity of said valve and reduce impact noise between said valve and at least one of said valve seat means and said housing.
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Abstract
The present invention is a thermally compensated noise control device for a solenoid-actuated valve. The device includes a thermally expanding ring which varies the amount of clearance between a damper assembly and a passageway in which the damper assembly is disposed to control fluid flow past the damper assembly.
15 Citations
20 Claims
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1. A valve assembly for controlling fluid flow between a fluid supply source and fluid actuating device in a vehicle transmission, said assembly comprising:
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a housing having a supply port for connection with the fluid supply source, an element port for connection with the fluid actuating device, and a passageway communicating with said supply port and said element port; a valve disposed within said passageway and moveable between positions which cause the element port to be either connected to said supply port or a vent port; a valve seat means forming at least one valve seat in said passageway and having a central passage communicating therethrough; electromagnetic means for producing a magnetic field when electrically energized; a plunger operatively connected to said electromagnetic means having a longitudinal axis aligned with said central passageway to move said valve and act in conjunction with said valve and said valve seat means to effect the element connection to either said supply or vent port; a damper slideably disposed within said passageway; and said damper including means for expanding and contracting in response to the temperature of the fluid to allow gradual flow of fluid within said passageway to slow the velocity of said valve and reduce impact noise between said valve and at least one of said valve seat means and said housing. - View Dependent Claims (2, 3, 4)
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5. A valve assembly for controlling fluid flow between a fluid supply source and fluid actuating device in a vehicle transmission, said assembly comprising:
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a housing having a supply port for connection with the fluid supply source, an element port for connection with the fluid actuating device, and a passageway communicating with said supply port and said element port; a valve disposed within said passageway and moveable between positions which cause the element port to be either connected to said supply port or a vent port; a valve seat means forming at least one valve seat in said passageway and having a central passage communicating therethrough; electromagnetic means for producing a magnetic field when electrically energized; a plunger operatively connected to said electromagnetic means having a longitudinal axis aligned with said central passageway to move said valve and act in conjunction with said valve and said valve seat means to effect the element connection to either said supply or vent port; said valve including means for expanding and contracting in response to the temperature of the fluid to allow gradual flow of fluid within said passageway to slow the velocity of said valve and reduce impact noise between said valve and at least one of said valve seat means and said housing; said means comprising a damper slideably disposed within said passageway and having first and second axially spaced ends; said damper having at least one axially extending rib with a diameter less than the diameter of said passageway to allow gradual flow of fluid past said land; said damper having a male projection extending axially from said first end toward said valve seat means; and said damper including tab means forming at least one tab extending axially away from said valve seat means at said second end and having a notch therein. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A valve assembly for controlling fluid flow between a fluid supply source and fluid actuating device in a vehicle transmission, said assembly comprising:
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a housing having a supply port for connection with the fluid supply source, an element port for connection with the fluid actuating device, and a passageway communicating with said supply port and said element port; an insert disposed in said passageway and having at least one seat and a central passage communicating therethrough; a damper disposed within said passageway and moveable between positions which cause the element port to be either connected to said supply port or a vent port; a plunger having a longitudinal axis aligned with said center of said damper to move said damper and act in conjunction with said damper and said valve seat to effect the element connection to either said supply or vent; electromagnetic means for producing a magnetic field when electrically energized; armature means moveable in response to the presence and absence of a magnetic field for actuating said plunger; said damper having at least one axially extending land with a diameter less than the diameter of said passageway to allow gradual flow of fluid past said land; said damper including tab means forming at least one tab extending axially and having a notch therein; and means disposed in said notch for expanding and contracting in response to the temperature of the fluid for varying the flow of fluid within said passageway and reducing impact noise.
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Specification