Lubricating oil supplying system for internal combustion engine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01M-003/04
F01M-003/00
F01M-001/04
F01M-001/00
F16K-024/00
출원번호
US-0240834
(2005-10-03)
등록번호
US-7331323
(2008-02-19)
우선권정보
JP-2004-293504(2004-10-06)
발명자
/ 주소
Hara,Seinosuke
출원인 / 주소
Hitachi, Ltd.
대리인 / 주소
Foley & Lardner LLP
인용정보
피인용 횟수 :
8인용 특허 :
11
초록▼
A lubricating oil supplying system for an internal combustion engine includes a lubricating oil storage section for storing lubricating oil. A driven pump is driven by the internal combustion engine to suck the lubricating oil from the lubricating oil storage section and discharge the lubricating o
A lubricating oil supplying system for an internal combustion engine includes a lubricating oil storage section for storing lubricating oil. A driven pump is driven by the internal combustion engine to suck the lubricating oil from the lubricating oil storage section and discharge the lubricating oil to a discharge passage. An electric pump is provided for sucking the lubricating oil discharged from the driven pump to the discharge passage and discharge the lubricating oil to a lubricating oil requiring section in the internal combustion engine. A controlling mechanism is provided for drivingly controlling the electric pump in accordance with a control signal. A bypass passage is provided for bypassing the driven pump. A check valve is disposed in the bypass passage to allow the lubricating oil in the lubricating oil storage section to flow only through a path bypassing the driven pump and toward the discharge passage.
대표청구항▼
What is claimed is: 1. A lubricating oil supplying system for an internal combustion engine, comprising: a lubricating oil storage section for storing lubricating oil; a driven pump driven by the internal combustion engine to suck the lubricating oil from said lubricating oil storage section and di
What is claimed is: 1. A lubricating oil supplying system for an internal combustion engine, comprising: a lubricating oil storage section for storing lubricating oil; a driven pump driven by the internal combustion engine to suck the lubricating oil from said lubricating oil storage section and discharge the lubricating oil to a discharge passage; an electric pump for sucking the lubricating oil discharged from said driven pump to the discharge passage and discharge the lubricating oil to a lubricating oil requiring section in the internal combustion engine; a controlling mechanism for drivingly controlling said electric pump in accordance with a control signal; a bypass passage for bypassing said driven pump; and a check valve disposed in said bypass passage to allow the lubricating oil in the lubricating oil storage section to flow only through a path bypassing said driven pump and toward the discharge passage. 2. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 1, further comprising a second bypass passage for bypassing said electric pump, and a bypass valve disposed in the second bypass passage and adapted to open in accordance with the pressure level in the discharge passage. 3. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 1, further comprising a second bypass passage for bypassing said electric pump, and a bypass valve disposed in the second bypass passage and adapted to open when said electric pump stops operating. 4. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 1, further comprising a pressure reducing valve for reducing the pressure of the lubricating oil supplied to the lubricating oil requiring section when the pressure in the section between said electric pump and the lubricating oil requiring section exceeds a predetermined level. 5. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 1, further comprising a filter disposed between said driven pump and said electric pump. 6. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 1, wherein said electric pump stops operating when the engine speed rises. 7. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 1, wherein said electric pump operates when said driven pump fails to operate. 8. A lubricating oil supplying system as claimed in claim 1, wherein said bypass passage extends through a portion of said driven pump and connects said lubricating oil storage section and said discharge passage so as to allow lubricating oil to be sucked by said electric pump from said lubricating oil storage section to said discharge passage without first being sucked by said driven pump from said lubricating oil storage section, and wherein the check valve is disposed in said portion of said driven pump. 9. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 1, further comprising a relief valve disposed in said bypass passage to allow the lubricating oil within the discharge passage to flow to a lower pressure side when the discharge pressure of the lubricating oil discharged from said driven pump to the discharge passage exceeds a predetermined level. 10. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 9, further comprising a second bypass passage for bypassing said electric pump, and a bypass valve disposed in the second bypass passage and adapted to open in accordance with the pressure level in the discharge passage, wherein the bypass valve is adapted to open at a pressure level lower than the pressure level at which the relief valve opens. 11. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 9, wherein the lubricating oil that flows out through the relief valve is returned into said lubricating oil storage section at the lower pressure side, and wherein said check valve is disposed inside the relief valve to allow the lubricating oil to flow only through a path from said lubricating oil storage section to the discharge passage. 12. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 11, wherein the relief valve includes a plunger valve body having a pressure receiving section formed at one end of the plunger valve body, a section defining a lower pressure chamber formed at the other end of the plunger valve body to be in communication with said lubricating oil storage section, and a biasing member disposed in the lower pressure chamber to bias the plunger valve body in one direction, wherein a part of the lubricating oil acting on the pressure receiving section flows through the lower pressure chamber into said lubricating oil storage section when the plunger valve body moves against the biasing force of the biasing member, and wherein said check valve is disposed in the pressure receiving section of the relief valve. 13. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 1, wherein the lubricating oil requiring section includes a main oil gallery for supplying the lubricating oil to sliding sections in the internal combustion engine, and a variable valve actuation mechanism operated by oil pressure, wherein said electric pump is driven by said controlling mechanism in accordance with an operating condition of the variable valve actuation mechanism. 14. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 13, wherein the internal combustion engine is a multi-cylinder V-type engine having two banks of cylinders, each bank of cylinders having a variable valve actuation mechanism associated therewith. 15. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 13, wherein the variable valve actuation mechanism is a variable valve lift mechanism. 16. A lubricating oil supplying system for an internal combustion engine, as claimed in claim 13, wherein the variable valve actuation mechanism is a valve timing controlling mechanism. 17. A lubricating oil supplying system as claimed in claim 1, wherein said driven pump comprises: a pump mechanism for sucking lubricating oil from the storage section and discharging the lubricating oil to a discharge passage; a plunger valve body having a pressure receiving section which is formed at one end of said plunger valve body and opens to the discharge passage, the plunger valve body being movable to release to a low pressure section a part of the lubricating oil discharged from said pump mechanism to the discharge passage; a section defining a low pressure chamber formed at the other end of said plunger valve body and in communication with the low pressure section; and a biasing member disposed in the low pressure chamber to bias said plunger valve body in one direction, wherein the check valve is disposed in the pressure receiving section of said plunger valve body to allow the lubricating oil to flow through a path from said lower pressure chamber to the discharge passage. 18. A lubricating oil supplying system as claimed in claim 17, wherein said check valve includes a check ball for opening and closing a communicating hole formed in the pressure receiving section of said plunger valve body to communicate the low pressure chamber and the discharge passage, and a retainer fixed to the pressure receiving section of said plunger valve body to accommodate and retain the check ball therein. 19. A lubricating oil supplying system as claimed in claim 18, further comprising a second biasing member disposed within the retainer to bias the check ball in a direction to close the communicating hole. 20. A lubricating oil supplying system as claimed in claim 18, wherein the retainer is fixedly disposed within a valve hole formed in the pressure receiving section of said plunger valve body. 21. A fluid pump comprising: a pump mechanism for sucking fluid from a storage section and discharging the fluid to a discharge section; a section defining a bypass passage bypassing said pump mechanism so as to connect the storage section and the discharge section; a plunger valve body movably disposed in said bypass passage and having a pressure receiving section which is formed at one end of said plunger valve body and opens to the discharge section, the plunger valve body being movable to release to a low pressure section a part of the fluid discharged from said pump mechanism to the discharge section; a section defining a low pressure chamber formed at the other end of said plunger valve body and in communication with the low pressure section; a biasing member disposed in the low pressure chamber to bias said plunger valve body in one direction; and a check valve disposed in the pressure receiving section of said plunger valve body to allow the fluid to flow through a path from said lower pressure chamber to the discharge section. 22. A fluid pump as claimed in claim 21, wherein said check valve includes a check ball for opening and closing a communicating hole formed in the pressure receiving section of said plunger valve body to communicate the low pressure chamber and the discharge section, and a retainer fixed to the pressure receiving section of said plunger valve body to accommodate and retain the check ball therein. 23. A fluid pump as claimed in claim 22, further comprising a second biasing member disposed within the retainer to bias the check ball in a direction to close the communicating hole. 24. A fluid pump as claimed in claim 22, wherein the retainer is fixedly disposed within a valve hole formed in the pressure receiving section of said plunger valve body. 25. A lubricating oil supplying system for an internal combustion engine, comprising: a lubricating oil storage section for storing lubricating oil; a first pump for sucking the lubricating oil from said lubricating oil storage section and discharging the lubricating oil to a discharge passage; a second pump for sucking the lubricating oil discharged from said first pump to the discharge passage and discharging the lubricating oil to a lubricating oil requiring section in the internal combustion engine; a bypass passage for bypassing said first pump; and an opening and closing mechanism disposed in said bypass passage to open said bypass passage when the amount of the lubricating oil discharged from said first pump exceeds that discharged from said second pump, and to cut off said bypass passage when the amount of the lubricating oil discharged from said first pump does not exceed the amount of the lubricating oil discharged from said second pump. 26. A fluid pump comprising: a pump mechanism for sucking fluid from a storage section and discharging the fluid to a discharge section, which is connected to an electric pump for sucking the fluid discharged from said pump mechanism; a section defining a bypass passage bypassing said pump mechanism so as to connect the storage section and the discharge section; a plunger valve body movably disposed in said bypass passage and having a pressure receiving section which is formed at one end of said plunger valve body and opens to the discharge section, the plunger valve body being movable to release to a low pressure section a part of the fluid discharged from said pump mechanism to the discharge section; a section defining a low pressure chamber formed at the other end of said plunger valve body and in communication with the low pressure section; a biasing member disposed in the low pressure chamber to bias said plunger valve body in one direction; and a check valve disposed in the pressure receiving section of said plunger valve body to allow the fluid to flow through a path from said lower pressure chamber to the discharge section.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (11)
Trimble, Robert E.; Christiansen, Tage; Kryhlmand, Anders, Combination check valve and pressure release valve.
Arnold Bernhard,DEX ; Eisenbacher Egon,DEX ; Pawellek Franz,DEX, Control for a fluid pressure supply system, particularly for high pressure in a fuel injection system.
Hoelle, Michael; Kemmler, Roland; Rau, Erhard; Schnuepke, Hubert, Coolant circuit for an internal combustion engine and method of making and using same.
Redmond Frederick D. (5 Mayalls Close Tirley GBX GLOS GL19 4HW ) Whitby Alan D. (13 Graystone Close Milton ; Tewkesbury GBX GLOS GL20 8AY ), Lubrication system.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.