Temperature Sensor
First Claim
Patent Images
1. A temperature sensor comprising:
- a housing;
a temperature sensing element disposed in said housing; and
a particulate media disposed in said housing and at least partially around said temperature sensing element, said particulate media comprising a blend of first particles and second particles, said second particles having a size smaller than first particles, whereby an interstitial volume is established in said particulate media for entraining an amount of oxygen sufficient to avoid a reducing atmosphere in said housing.
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Abstract
A temperature sensor including a housing and a temperature sensing element at least partially disposed in the housing. A particulate media, which may include a blend of differently sized particles, is disposed in the housing and at least partially surrounds the temperature sensing element. The particulate media may entrain oxygen to avoid a reducing atmosphere in said housing.
24 Citations
20 Claims
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1. A temperature sensor comprising:
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a housing;
a temperature sensing element disposed in said housing; and
a particulate media disposed in said housing and at least partially around said temperature sensing element, said particulate media comprising a blend of first particles and second particles, said second particles having a size smaller than first particles, whereby an interstitial volume is established in said particulate media for entraining an amount of oxygen sufficient to avoid a reducing atmosphere in said housing. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A temperature sensor comprising:
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a housing;
a temperature sensing element disposed in said housing, said temperature sensing element comprising a resistive temperature detector comprising a metal film disposed on at least one substrate;
a particulate media disposed in said housing and at least partially around said temperature sensing element, said particulate media comprising a blend of first particles and second particles, said second particles having a size of about 71% or less of the size of said first particles, whereby an interstitial volume is established in said particulate media for entraining an amount of oxygen sufficient to avoid a reducing atmosphere in said housing; and
a body portion, said housing being coupled to said body portion to seal said temperature sensing element and said particulate media therein. - View Dependent Claims (9, 10)
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11. A temperature sensor comprising:
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a housing;
a temperature sensing element disposed in said housing, said temperature sensing element comprising a resistive temperature detector comprising a metal film disposed on at least one substrate; and
a particulate media disposed in said housing and at least partially around said temperature sensing element, said particulate media comprising a blend of first particles and second particles, said second particles having a size of about 71% or less of the size of said first particles, whereby an interstitial volume is established in said particulate media for entraining oxygen.
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12. A method of reducing degradation of a temperature sensor comprising:
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pre-oxidizing interior surfaces of a housing;
disposing said temperature sensing element in a housing;
providing a particulate media in said housing and at least partially around said temperature sensing element, said particulate media providing an interstitial volume; and
entraining oxygen in said interstitial volume. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A system comprising:
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an engine an exhaust system configured to carry exhaust gases from said engine;
a temperature sensor coupled to said exhaust system for detecting a temperature of said exhaust gases, said temperature sensor comprising a housing, a temperature sensing element disposed in said housing, and a particulate media disposed in said housing and at least partially around said temperature sensing element, said particulate media comprising a blend of first particles and second particles, said second particles having a size smaller than first particles, whereby an interstitial volume is established in said particulate media for entraining an amount of oxygen sufficient to avoid a reducing atmosphere in said housing; and
a vehicle control system configured to controlling at least one operating parameter of the engine in response to an output of said temperature sensor. - View Dependent Claims (19, 20)
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Specification