IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0245349
(2002-09-18)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Finnegan, Henderson, Farabow, Garrett & Dunner
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인용정보 |
피인용 횟수 :
7 인용 특허 :
8 |
초록
▼
A fluid system for supplying low and high pressure fluid is provided. A first pump discharges a first pump flow. A filter receives a first portion of the first pump flow and discharges a filter flow. A first accumulator receives a first portion of the filter flow. A valve receives a second portion o
A fluid system for supplying low and high pressure fluid is provided. A first pump discharges a first pump flow. A filter receives a first portion of the first pump flow and discharges a filter flow. A first accumulator receives a first portion of the filter flow. A valve receives a second portion of the first pump flow and a second portion of the filter flow, and discharges a valve flow. The valve is movable between a first position, providing a first flow path between the second portion of the first pump flow and the valve flow, and a second position, providing a second flow path between the second portion of the filter flow and the valve flow. A second pump receives the valve flow and discharges a second pump flow. A second accumulator receives the second pump flow.
대표청구항
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1. A fluid system for supplying a low pressure fluid and a high pressure fluid, the fluid system comprising: a first fluid pump configured to discharge a first fluid pump outlet flow, which is divisible into a first and a second portion; a fluid filter connected to said first fluid pump to rece
1. A fluid system for supplying a low pressure fluid and a high pressure fluid, the fluid system comprising: a first fluid pump configured to discharge a first fluid pump outlet flow, which is divisible into a first and a second portion; a fluid filter connected to said first fluid pump to receive said first portion of said first fluid pump outlet flow and configured to discharge a fluid filter outlet flow, which is divisible into a first and a second portion; a low pressure fluid accumulator connected to said fluid filter to receive said first portion of said fluid filter outlet flow; a priority valve connected to said first fluid pump to receive said second portion of said first fluid pump outlet flow, connected to said fluid filter to receive said second portion of said fluid filter outlet flow, and configured to discharge a priority valve outlet flow, said priority valve movable between a first position, which provides a first priority valve fluid flow path between said second portion of said first fluid pump outlet flow and said priority valve outlet flow, and a second position, which provides a second priority valve fluid flow path between said second portion of said fluid filter outlet flow and said priority valve outlet flow; a second fluid pump connected to said priority valve to receive said priority valve outlet flow and configured to discharge a second fluid pump outlet flow; and a high pressure fluid accumulator connected to said second fluid pump to receive said second fluid pump outlet flow. 2. The fluid system of claim 1, wherein said low pressure fluid accumulator supplies fluid to lubricate a diesel engine and said high pressure fluid accumulator supplies fluid to fluidly actuate fuel injectors.3. The fluid system of claim 2, further including a fluid cooler to receive said first portion of said first fluid pump outlet flow.4. The fluid system of claim 2, further including a check valve disposed in said first portion of said fluid filter outlet flow.5. The fluid system of claim 4, wherein said check valve is configured to maintain a pressure in said second portion of said fluid filter outlet flow from approximately ten pounds-per-square-inch to approximately twenty pounds-per-square-inch above a pressure in said low pressure fluid accumulator.6. The fluid system of claim 2, further including a check valve disposed in said first fluid pump outlet flow.7. The fluid system of claim 6, wherein said check valve maintains a pressure downstream of said check valve that is approximately one pound-per-square-inch to approximately 5 pounds-per-square-inch above a pressure upstream of said check valve.8. The fluid system of claim 1, wherein said priority valve is in said first position and said second priority valve fluid flow path is blocked.9. The fluid system of claim 1, wherein said second portion of said fluid filter outlet flow has a temperature and a pressure, and said priority valve provides said first priority valve fluid flow path in response to the temperature being less than a predetermined temperature and the pressure being less than a predetermined pressure.10. The fluid system of claim 9, wherein said priority valve provides said second priority valve fluid flow path in response to the temperature being equal to or greater than said predetermined temperature or the pressure being equal to or greater than said predetermined pressure.11. The fluid system of claim 1, wherein said priority valve includes a housing having a first fluid inlet port, a second fluid inlet port, and a fluid outlet port, a spool located within said housing, a resilient element biasing said spool relative to said housing to a first position, and a thermally reactive element exposed to a temperature input.12. The fluid system of claim 11, wherein said spool, in a first position, provides said first priority valve fluid flow path from said first fluid inlet port to said fluid outlet port and substantially blocks said second priority valve fluid flow path, and, in a second position, provides said second priority valve fluid flow path from said second fluid inlet port to said fluid outlet port and substantially blocks said first priority valve fluid flow path.13. The fluid system of claim 11, wherein said thermally reactive element has a first configuration in response to said temperature input being less than a predetermined temperature, said first configuration allowing said spool to be in said first position, and said thermally reactive element has a second configuration in response to said temperature input being equal to or greater than said predetermined temperature, said second configuration of said thermally reactive element preventing said spool from being in said first position.14. A pressure and temperature controlled valve for controlling the flow path of a fluid, the valve comprising: a housing having a first fluid inlet port, a second fluid inlet port, and a fluid outlet port; a spool located within said housing, said spool movable between a first position, at which flow of the fluid along a first flow path between said first fluid inlet port and said fluid outlet port is passed and flow of the fluid along a second flow path between said second fluid inlet port and said fluid outlet port is blocked, and a second position, at which flow of the fluid along said first flow path is blocked and flow of the fluid along said second flow path is passed; a resilient element biasing said spool relative to said housing to a first position; and a thermally reactive element exposed to a temperature input, said thermally reactive element having a first configuration in response to said temperature input being at a first temperature, said first configuration allowing said spool to be in said first position, and having a second configuration in response to said temperature input being at a second temperature, said second configuration preventing said spool from being in said first position. 15. The valve of claim 14, wherein said thermally reactive element is a wax thermostat.16. The valve of claim 14, wherein said temperature input is a temperature of the fluid flowing along said second flow path.17. The valve of claim 14, wherein said spool moves from said first position to said second position in response to a pressure of the fluid flowing along said second flow path.18. A method for supplying a low pressure fluid and a high pressure fluid, the method comprising: pumping a fluid through a first fluid pump to create a first pumped flow; filtering a first portion of said first pumped flow to create a filtered flow; passing a first portion of said filtered flow to a first inlet port of a priority valve; passing a second portion of said first pumped flow to a second inlet port of a priority valve; transmitting one of said first portion of said filtered flow and said second portion of said first pumped flow through said priority valve to create a priority valve outlet flow; passing said priority valve outlet flow to a second fluid pump; and pumping said priority valve outlet flow through said second fluid pump to create a second pump outlet flow. 19. The method of claim 18, wherein said first portion of said filtered flow at said first inlet port has a pressure and a temperature and said second portion of said first pumped flow is transmitted through said priority valve in response to the temperature being less than a predetermined temperature and the pressure being less than a predetermined pressure.20. The method of claim 18, wherein said first portion of said filtered flow at said first inlet port has a pressure and a temperature and said first portion of said first pumped flow is transmitted through said priority valve in response to the temperature being more than a predetermined temperature or the pressure being more than a predetermined pressure.21. The method of claim 18, further including: providing a s econd portion of said filtered flow to a low pressure fluid accumulator wherein said low pressure fluid accumulator supplies lubricating oil to a diesel engine; and providing said second fluid pump outlet flow to a high pressure fluid accumulator wherein said high pressure fluid accumulator supplies an oil to fluidly actuate fuel injectors.
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