KR20140010974A - Pump unit for supplying fuel, preferably diesel oil, from a containing tank to an internal combustion engine - Google Patents

Pump unit for supplying fuel, preferably diesel oil, from a containing tank to an internal combustion engine Download PDF

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Publication number
KR20140010974A
KR20140010974A KR1020137026396A KR20137026396A KR20140010974A KR 20140010974 A KR20140010974 A KR 20140010974A KR 1020137026396 A KR1020137026396 A KR 1020137026396A KR 20137026396 A KR20137026396 A KR 20137026396A KR 20140010974 A KR20140010974 A KR 20140010974A
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South Korea
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pump unit
pump
valve housing
branch
connector
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KR1020137026396A
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Korean (ko)
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KR101900981B1 (en
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마르코 람
루지에로 지씨
마누엘 타바니
넬로 메도로
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로베르트 보쉬 게엠베하
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/54—Arrangement of fuel pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F02M37/0029—Pressure regulator in the low pressure fuel system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

본 발명은 내연기관(3)에 연료, 바람직하게는 디젤유를 공급하기 위한 펌프 유닛에 관한 것으로, 상기 펌프 유닛은 저장 탱크(2)로부터 연료를 흡입하도록 구성된 예비-공급 펌프(7), 그리고 상기 예비-공급 펌프(7)와 고압 펌프(6)를 상호연결하기 위한 제1 분기(15), 고압 펌프(6)와 내연기관(3)을 상호연결하기 위한 제2 분기(17), 및 제1 분기(15)와 저장 탱크(2)를 상호연결하는 제3 분기(21)를 구비한 유체 회로(14)를 포함하며, 적어도 부분적으로, 고압 펌프(6)의 펌프 하우징(8)을 관통하여 형성된 장착 개구(27) 내에 상호 동축으로 장착되는 오버플로우 밸브(26)와 커넥터(37)에 의해 형성된다. The present invention relates to a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine (3), said pump unit being configured to suck fuel from a storage tank (2), and A first branch 15 for interconnecting the pre-supply pump 7 and a high pressure pump 6, a second branch 17 for interconnecting the high pressure pump 6 and the internal combustion engine 3, and A fluid circuit (14) having a third branch (21) interconnecting the first branch (15) and the storage tank (2), and at least partially the pump housing (8) of the high pressure pump (6). It is formed by the overflow valve 26 and the connector 37 which are coaxially mounted in the mounting opening 27 formed through.

Figure P1020137026396
Figure P1020137026396

Description

저장 탱크로부터 내연기관으로 연료, 바람직하게는 디젤유를 공급하기 위한 펌프 유닛{PUMP UNIT FOR SUPPLYING FUEL, PREFERABLY DIESEL OIL, FROM A CONTAINING TANK TO AN INTERNAL COMBUSTION ENGINE}PUMP UNIT FOR SUPPLYING FUEL, PREFERABLY DIESEL OIL, FROM A CONTAINING TANK TO AN INTERNAL COMBUSTION ENGINE}

본 발명은 저장 탱크로부터 내연기관으로 연료, 바람직하게는 디젤유를 공급하기 위한 펌프 유닛에 관한 것이다. The invention relates to a pump unit for supplying fuel, preferably diesel oil, from a storage tank to an internal combustion engine.

특히, 본 발명은 저장 탱크로부터 연료를 흡입하도록 구성된 예비-공급(pre-feed) 펌프, 예를 들어 전기 펌프와, 내연기관에 연료를 공급하도록 구성된 고압 펌프, 예를 들어 피스톤 펌프와, 전기 펌프와 피스톤 펌프를 상호연결하기 위한 제1 분기 및 피스톤 펌프와 내연기관을 상호연결하기 위한 제2 분기를 가진 유체 회로를 포함하는 유형의 펌프 유닛에 관한 것이다. In particular, the present invention provides a pre-feed pump, for example an electric pump, configured to suck fuel from a storage tank, a high pressure pump, for example a piston pump, configured to supply fuel to an internal combustion engine, and an electric pump. And a fluid circuit having a first branch for interconnecting the piston pump and a second branch for interconnecting the piston pump and the internal combustion engine.

일반적으로 유체 회로는, 피스톤 펌프에 공급되는 연료의 순간 유량을 내연기관의 복수의 작동 파라미터 값들의 함수로서 선택적으로 제어하기 위해 제1 분기 상에 배치되는 계량 솔레노이드 밸브를 추가로 포함하며, 제1 분기와 저장 탱크를 상호연결하는 제3 분기는 제1 분기를 따르는 연료의 전진 방향으로 상기 계량 솔레노이드 밸브의 상류에서 제1 분기에 연결되어, 계량 솔레노이드 밸브를 통해 공급되는 양을 초과하는 연료 유량의 적어도 일부가 저장 탱크로 배출될 수 있게 한다. The fluid circuit generally further comprises a metering solenoid valve disposed on the first branch for selectively controlling the instantaneous flow rate of the fuel supplied to the piston pump as a function of a plurality of operating parameter values of the internal combustion engine, the first A third branch, which interconnects the branch and the storage tank, is connected to the first branch upstream of the metering solenoid valve in a forward direction of fuel along the first branch, thereby exceeding the amount of fuel flow that is supplied through the metering solenoid valve. Allow at least some to be discharged to the storage tank.

상기 제3 분기는 피스톤 펌프의 펌프 하우징을 관통하여 형성된 제1 장착 개구에 장착되는 오버플로우 밸브를 구비하며, 상기 오버플로우 밸브 내로의 연료 유입을 위한 입구, 상기 오버플로우 밸브로부터의 연료 배출을 위한 하나 이상의 출구, 및 상기 출구를 폐쇄하는 위치와 상기 출구를 개방하는 위치 사이를 이동할 수 있는 슬라이드 밸브를 갖는다. The third branch has an overflow valve mounted to a first mounting opening formed through the pump housing of the piston pump, the inlet for fuel entry into the overflow valve, for the discharge of fuel from the overflow valve. At least one outlet and a slide valve capable of moving between a position for closing the outlet and a position for opening the outlet.

상기 제3 분기는 또한, 상기 제1 장착 개구에 대해 횡방향으로 피스톤 펌프의 펌프 하우징을 관통하여 형성된 제2 장착 개구에 장착되는 커넥터에 의해 적어도 부분적으로 형성되고, 오버플로우 밸브의 출구와 유체 연통되며, 저장 탱크에 연료를 공급하기 위한 파이프에 연결되도록 펌프 하우징으로부터 돌출한다. The third branch is further formed at least in part by a connector mounted to a second mounting opening formed through the pump housing of the piston pump transverse to the first mounting opening and in fluid communication with the outlet of the overflow valve. And protrudes from the pump housing to be connected to a pipe for supplying fuel to the storage tank.

전술한 유형의 공지된 펌프 유닛은, 주로 두 개의 장착 개구, 즉 1개의 오버플로우 밸브용 장착 개구와 1개의 커넥터용 장착 개구의 제공으로 인해 상기 펌프 하우징에서의 가공 작업의 실행이 비교적 복잡하고, 오래 걸리며, 비용이 많이 든다는 사실에 기인하는 많은 단점이 있다. Known pump units of the type described above are relatively complicated in the execution of machining operations in the pump housing mainly due to the provision of two mounting openings, one mounting opening for the overflow valve and one mounting opening for the connector, There are many drawbacks due to the fact that they are long and costly.

본 발명의 과제는, 저장 탱크로부터 내연기관으로 연료, 바람직하게는 디젤유를 공급하기 위한 펌프 유닛으로서, 상기 단점이 해소되고 간단하면서도 경제적으로 제조되는 펌프 유닛을 제공하는 것이다. SUMMARY OF THE INVENTION An object of the present invention is to provide a pump unit for supplying fuel, preferably diesel oil, from a storage tank to an internal combustion engine, in which the above disadvantages are eliminated and which is produced simply and economically.

본 발명에 따라, 청구범위에 기재된, 저장 탱크로부터 내연기관으로 연료, 바람직하게는 디젤유를 공급하기 위한 펌프 유닛이 제공된다. According to the invention, there is provided a pump unit for supplying fuel, preferably diesel oil, from a storage tank to an internal combustion engine, as described in the claims.

이제 비제한적 실시예를 나타내는 첨부도면을 참조하여 본 발명을 설명한다. The invention will now be described with reference to the accompanying drawings, which illustrate a non-limiting embodiment.

도 1은 본 발명의 펌프 유닛의 한 바람직한 실시예의 유체 경로도이다.
도 2는 편의상 일부분이 생략된, 도 1의 펌프 유닛의 세부 부분 단면도이다.
도 3은 편의상 일부분이 생략된, 도 2의 변형된 세부 부분 단면도이다.
도 4는 도 3의 변형예의 개략적인 사시도이다. 1 is a fluid path diagram of one preferred embodiment of the pump unit of the present invention.
FIG. 2 is a detailed partial cross-sectional view of the pump unit of FIG. 1, with portions omitted for convenience.
FIG. 3 is a modified, partial cross-sectional view of FIG. 2, with portions omitted for convenience.
4 is a schematic perspective view of a modification of FIG. 3.

도 1을 참조하면, 도면부호 1은 저장 탱크(2)로부터 내연기관(3)으로, 이 경우 디젤 엔진으로, 액체 연료, 바람직하게는 디젤유를 공급하기 위한 펌프 유닛 전체를 나타내며, 상기 내연기관은 "커먼 레일(common rail)"로 알려져 있는 연료 분배 매니폴드(4)와, 상기 매니폴드(4)에 연결되어 엔진(3)의 대응 연소실(도시되지 않음)에 연료를 분사하도록 구성된 복수의 분사기(5)를 포함한다. Referring to FIG. 1, reference numeral 1 represents the entire pump unit for supplying liquid fuel, preferably diesel oil, from the storage tank 2 to the internal combustion engine 3, in this case a diesel engine, said internal combustion engine. Is a plurality of fuel distribution manifolds 4 known as “common rails” and a plurality of fuel cells connected to the manifolds 4 and configured to inject fuel into a corresponding combustion chamber (not shown) of the engine 3. Injector 5.

펌프 유닛(1)은 엔진(3)에 연료를 공급하도록 구성된 고압 펌프(6), 여기서는 피스톤 펌프와, 탱크(2)로부터 펌프(6)에 연료를 공급하도록 구성된 저압 펌프 또는 예비-공급 펌프, 여기서는 전기 펌프를 포함한다. The pump unit 1 is a high pressure pump 6 configured to supply fuel to the engine 3, here a piston pump, a low pressure pump or a pre-feed pump configured to supply fuel from the tank 2 to the pump 6, It includes an electric pump.

펌프(6)는 규정된 종축(9)을 갖는 펌프 하우징(8)과, 상기 펌프 하우징(8)에 형성되고 상기 축(9)에 실질적으로 수직인 종축(11)을 가지며 피스톤(12)에 의해 슬라이드 가능하게 결합되는 하나 이상의 실린더(10)를 포함한다. The pump 6 has a pump housing 8 having a defined longitudinal axis 9, a longitudinal axis 11 formed in the pump housing 8 and substantially perpendicular to the axis 9, and having a piston 12. One or more cylinders 10 slidably coupled by means.

피스톤(12)은 펌프 하우징(8)에 끼워진 공지된 유형의 액추에이터(13)에 의해 실린더(10)를 따라 움직이며, 실린더(10)에 연료를 흡입하기 위한 외향 스트로크 및 실린더(10)에 포함된 연료를 압축하기 위한 리턴 스트로크를 포함하는 왕복 직선 운동을 한다.The piston 12 is moved along the cylinder 10 by an actuator 13 of known type fitted in the pump housing 8 and included in the cylinder 10 and outward stroke for sucking fuel into the cylinder 10. Reciprocating linear motion including a return stroke for compressing the spent fuel.

펌프 유닛(1)은 또한 연료를 공급하기 위한 유체 회로(14)를 포함하며, 상기 유체 회로는, 펌프들(6, 7)을 상호연결하고 액추에이터(13)를 윤활하기 위해 펌프 하우징(8)을 통해 연장되며 흡입 밸브(16)를 통해 실린더(10)에 연결되는 제1 분기(15), 그리고 펌프(6)와 매니폴드(4) 사이에서 연장되며 송출 밸브(18)를 통해 실린더(10)에 연결되는 제2 분기(17)를 포함한다. The pump unit 1 also includes a fluid circuit 14 for supplying fuel, which fluid pump circuit 8 for interconnecting the pumps 6, 7 and lubricating the actuator 13. Through the inlet valve 16 and connected to the cylinder 10, and between the pump 6 and the manifold 4 and through the outlet valve 18 to the cylinder 10. And a second branch 17 connected to the.

상기 분기(15)에는 계량 솔레노이드 밸브(19)가 제공되며, 상기 계량 솔레노이드 밸브는 분기(15, 17)를 따라서 연료의 전진 방향(20)으로 밸브(16)의 상류에 장착되고, 분기(15)를 폐쇄하는 위치와 개방하는 위치 사이에서 움직일 수 있으며, 펌프(6)에 공급되는 연료의 순간 유량을 엔진(3)의 복수의 작동 파라미터 값들의 함수로서 선택적으로 제어하도록 구성된다. The branch 15 is provided with a metering solenoid valve 19, which is mounted upstream of the valve 16 in the advancing direction 20 of fuel along branches 15, 17, and branch 15. Is movable between a closing position and an opening position, and is configured to selectively control the instantaneous flow rate of the fuel supplied to the pump 6 as a function of a plurality of operating parameter values of the engine 3.

상기 회로(14)는 또한, 방향(20)으로 솔레노이드 밸브(19) 상류의 분기(15)를 탱크(2)에 연결하고 솔레노이드 밸브(19)를 통해 공급되는 양을 초과하는 연료 유량의 적어도 일부가 탱크(2)로 배출될 수 있게 하는 제3 분기(21), 그리고 매니폴드(4)와 분기(21) 사이에서 연장되며 분사기(5)에 의해 요구되는 양을 초과하는 연료 유량이 탱크(2)로 배출되게 할 수 있는 제4 분기(22)를 포함한다. The circuit 14 also connects a branch 15 upstream of the solenoid valve 19 to the tank 2 in the direction 20 and at least a portion of the fuel flow rate exceeding the amount supplied through the solenoid valve 19. Third branch 21 and fuel flow rate extending between the manifold 4 and the branch 21 and allowing the fuel flow to exceed the amount required by the injector 5 to allow the gas to be discharged to the tank 2. And a fourth branch 22 which can be discharged to 2).

상기 회로(14)는 또한, 분기(15)로부터 펌프 하우징(8)을 통해 공급되고 액추에이터(13)의 지지 베어링(도시되지 않음)을 통해 누설되는 일체의 연료를 분기(21)로 배출하여 결과적으로 탱크(2)로 배출하기 위한 제5 분기(23), 그리고 방향(20)으로 솔레노이드 밸브(19)의 하류에서 분기(15)에 연결되고 분기(15)와 분기(21) 사이에서 연장되며, 솔레노이드 밸브(19)의 폐쇄 시 솔레노이드 밸브(19)를 통해 누설되는 연료 유량이 흡수될 수 있게 하고, 솔레노이드 밸브(19)의 개방 시 분기(24)에 의해 흡수되는 연료의 양을 특정 임계치 미만의 값으로 제한하도록 설계된 보정 개구(25)가 구비된 제6 분기(24)를 갖는다. The circuit 14 also discharges into the branch 21 any fuel that is supplied from the branch 15 through the pump housing 8 and leaks through the support bearings (not shown) of the actuator 13. And a branch 15 for discharge to the tank 2, and downstream of the solenoid valve 19 in the direction 20 and extending between the branch 15 and the branch 21. Fuel flow leaking through the solenoid valve 19 when the solenoid valve 19 is closed can be absorbed, and the amount of fuel absorbed by the branch 24 when the solenoid valve 19 is opened is below a certain threshold. It has a sixth branch 24 equipped with a correction opening 25 designed to limit it to a value of.

도 1 및 도 2에 도시된 바와 같이, 분기(21)에는, 펌프 하우징(8)을 관통하여 형성되고 규정된 종축(28)을 가지며, 상기 축(28)에 대해 실질적으로 횡방향으로 놓인 환형 숄더(29)에 의해 상호 연결되는 수축부(27a)와 확장부(27b)를 포함하는 장착 개구(27) 내에 장착되는 오버플로우 밸브(26)가 제공된다. As shown in FIGS. 1 and 2, the branch 21 has an annular shape 28 formed through the pump housing 8 and defined, and which is substantially transverse to the axis 28. An overflow valve 26 is provided that is mounted in a mounting opening 27 that includes a constriction 27a and an extension 27b interconnected by a shoulder 29.

상기 밸브(26)는 실질적으로 원통형인 밸브 하우징(30)을 포함하며, 상기 밸브 하우징은 축(28)과 동축으로 연장되고, 링 시일(31)이 중간에 삽입된 형태로 개구(27)에 장착되며, 밸브 하우징(30) 내로의 연료 유입을 위한 축방향 개구(32)와 밸브 하우징(30)으로부터의 연료 배출을 위한 2개 이상의 반경방향 개구를 갖는다. The valve 26 comprises a substantially cylindrical valve housing 30, which extends coaxially with the shaft 28, with the ring seal 31 inserted in the opening 27 in the middle. And an axial opening 32 for fuel entry into the valve housing 30 and two or more radial openings for fuel discharge from the valve housing 30.

상기 밸브(26)는 또한 슬라이드 밸브(34)를 포함하며, 이 슬라이드 밸브는 밸브 하우징(30) 내에 축(28)과 동축으로 장착되고, 밸브 하우징(30)과 슬라이드 밸브(34) 사이에 삽입된 스프링(35)에 의해 개구(33)(도 2)를 폐쇄하는 위치로 움직이고, 보통은 그 위치에 유지되며, 연료에 의해 스프링(35)의 작용에 대항하여 개구(33) 폐쇄 위치로부터 개구 개방 위치(도시되지 않음)로 움직인다. The valve 26 also includes a slide valve 34, which is coaxially mounted with the shaft 28 in the valve housing 30 and inserted between the valve housing 30 and the slide valve 34. The openings 33 (FIG. 2) are moved to a position to close the openings 33 (FIG. 2) by the springs 35, which are normally held in that position and opening from the openings 33 closing position against the action of the springs 35 by the fuel. Move to open position (not shown).

슬라이드 밸브(34)가 그 개방 위치로 움직인 결과, 개구(33)를 통해 공급되는 연료는 분기(23)로부터 연료를 수용할 수도 있는 개구(27)의 부분(36)에 수집된다. As the slide valve 34 moves to its open position, the fuel supplied through the opening 33 is collected in the portion 36 of the opening 27, which may receive fuel from the branch 23.

분기(21)는 또한, 단일 슬리브(38)를 형성하도록 밸브 하우징(30)과 일체로 제조된 튜브형 커넥터(37)를 포함하며, 이 슬리브는 확장부(27b) 내에 축(28)과 동축으로 강제 끼워맞춤(interference fit) 방식으로 고정된다. Branch 21 also includes a tubular connector 37 that is integrally manufactured with valve housing 30 to form a single sleeve 38, which sleeve is coaxial with axis 28 in extension 27b. It is fixed by an interference fit method.

커넥터(37)는 분기(21)의 파이프(도시되지 않음) 형성 부분에 연결되고, 2개 이상의 연결 개구(39)를 통해 부분(36)과 연통되며, 이들 연결 개구는 슬리브(38)를 관통하여 축(28)에 대해 경사지게 형성된다. The connector 37 is connected to the pipe (not shown) forming part of the branch 21 and communicates with the part 36 through two or more connecting openings 39, which connecting openings pass through the sleeve 38. Inclined with respect to the shaft (28).

도 3 및 도 4에 도시된 변형예는, 밸브 하우징(30)과 커넥터(37)가 상호 별개인 2개의 개별 피스이고, 밸브 하우징(30)은, 축(28) 주위에 균일하게 분포되며 밸브 하우징(30)의 외표면에 형성된 대응 평활면(41) 상에 밸브 하우징(30)을 관통하여 형성되는 2개 이상의 반경방향 슬릿(40)을 갖는다는 점에서만 도 2에 도시된실시예와 상이하다. 3 and 4 are two separate pieces of valve housing 30 and connector 37 which are separate from each other, the valve housing 30 being uniformly distributed around the axis 28 and the valve It differs from the embodiment shown in FIG. 2 only in that it has two or more radial slits 40 formed through the valve housing 30 on a corresponding smooth surface 41 formed on the outer surface of the housing 30. Do.

상기 밸브(26)는 개구(27)에 슬라이드 가능하게 결합되고, 커넥터(37)에 의해 숄더(29)에 대해 축방향으로 고정되며, 상기 커넥터는 다시 강제 끼워맞춤식으로 확장부(27b) 내에 고정되고, 슬릿(40)과 대응 면(41)을 통해 부분(36)과 연통된다. The valve 26 is slidably coupled to the opening 27 and fixed axially with respect to the shoulder 29 by the connector 37, which in turn is securely fitted in the extension 27b. Communication with the part 36 via the slit 40 and the corresponding surface 41.

도시되지 않은 한 변형예에서, 밸브 하우징(30)은 또한 강제 끼워맞춤식으로개구(27) 내에 고정된다. In a variant not shown, the valve housing 30 is also secured in the opening 27 by force fit.

오버플로우 밸브(26) 및 커넥터(37)가 단일 장착 개구(27) 내에 장착됨으로써 펌프 하우징(8)의 구조가 단순해질 수 있고, 펌프 하우징(8)의 가공 비용이 절감되고 가공 시간이 절약될 수 있다. By mounting the overflow valve 26 and the connector 37 in the single mounting opening 27, the structure of the pump housing 8 can be simplified, and the processing cost of the pump housing 8 can be reduced and the processing time can be saved. Can be.

Claims (13)

저장 탱크(2)로부터 내연기관(3)으로 연료, 바람직하게는 디젤유를 공급하기 위한 펌프 유닛으로서, 상기 펌프 유닛은 저장 탱크(2)로부터 연료를 흡입하도록 구성된 예비-공급 펌프(7)와, 장착 개구(27)를 구비한 펌프 하우징(8)을 갖는 고압 펌프(6)와, 유체 회로(14)를 포함하고, 상기 유체 회로는 예비-공급 펌프(7)와 고압 펌프(6)를 상호연결하기 위한 제1 분기(15), 고압 펌프(6)와 내연기관(3)을 상호연결하기 위한 제2 분기(17), 및 제1 분기(15)와 저장 탱크(2)를 상호연결하기 위한 제3 분기를 포함하며, 상기 제3 분기(21)는 장착 개구(27)에 장착된 오버플로우 밸브(26)와, 제3 분기(21)를 따라 연료의 전진 방향(20)으로 상기 오버플로우 밸브(26)의 하류에 장착되고 제3 분기(21)의 파이프 형성 부분에 연결되는 커넥터(37)를 포함하는 펌프 유닛에 있어서,
상기 오버플로우 밸브(26)와 상기 커넥터(37)는 장착 개구(27) 내에 상호 동축으로 장착되는 것을 특징으로 하는, 펌프 유닛. A pump unit for supplying fuel, preferably diesel oil, from the storage tank 2 to the internal combustion engine 3, which pump unit comprises a pre-supply pump 7 configured to suck fuel from the storage tank 2. A high pressure pump (6) having a pump housing (8) with a mounting opening (27) and a fluid circuit (14), said fluid circuit comprising a pre-supply pump (7) and a high pressure pump (6). First branch 15 for interconnection, second branch 17 for interconnecting high pressure pump 6 and internal combustion engine 3, and interconnecting first branch 15 and storage tank 2 And a third branch (21) for the overflow valve (26) mounted in the mounting opening (27) and in the forward direction (20) of fuel along the third branch (21). 1. A pump unit comprising a connector 37 mounted downstream of the overflow valve 26 and connected to the pipe forming portion of the third branch 21.
The overflow valve (26) and the connector (37) are characterized in that they are mounted coaxially with each other in the mounting opening (27). 제1항에 있어서, 오버플로우 밸브(26)는 밸브 하우징(30)과, 상기 오버플로우 밸브(26)의 폐쇄 위치와 개방 위치 사이에서 움직이도록 상기 밸브 하우징(30)에 슬라이드 가능하게 결합되는 플러그(34)를 포함하는, 펌프 유닛. 2. The plug of claim 1 wherein the overflow valve (26) is slidably coupled to the valve housing (30) and the valve housing (30) to move between the closed and open positions of the overflow valve (26). Pump unit, comprising 34. 제2항에 있어서, 밸브 하우징(30)과 커넥터(37)가 일체형으로 제조되는, 펌프 유닛. The pump unit according to claim 2, wherein the valve housing (30) and the connector (37) are made in one piece. 제3항에 있어서, 밸브 하우징(30)과 커넥터(37)가 장착 개구 내에 강제 끼워맞춤 방식으로 고정되는, 펌프 유닛. 4. The pump unit according to claim 3, wherein the valve housing (30) and the connector (37) are fixed by a forced fit in the mounting opening. 제2항에 있어서, 밸브 하우징(30)과 커넥터(37)가 2개의 개별 피스로 제조되는, 펌프 유닛. The pump unit according to claim 2, wherein the valve housing (30) and the connector (37) are made of two separate pieces. 제5항에 있어서, 장착 개구(27)는 종축(28)과, 상기 종축(28)에 대해 횡방향으로 형성된 단부-정지 숄더(29)를 갖는, 펌프 유닛. Pump unit according to claim 5, wherein the mounting opening (27) has a longitudinal axis (28) and an end-stop shoulder (29) formed transverse to the longitudinal axis (28). 제6항에 있어서, 장착 개구(27)는 단부-정지 숄더(29)에 의해 상호연결되는 축소부(27a)와 확장부(27b)를 포함하는, 펌프 유닛. The pump unit according to claim 6, wherein the mounting opening (27) comprises a reduction (27a) and an extension (27b) interconnected by an end-stop shoulder (29). 제5항 내지 제7항 중 어느 한 항에 있어서, 밸브 하우징(30)은 장착 개구(27) 내에 강제 끼워맞춤 방식으로 고정되는, 펌프 유닛. 8. The pump unit according to claim 5, wherein the valve housing (30) is fixed in a fitting fit in the mounting opening (27). 9. 제6항 또는 제7항에 있어서, 밸브 하우징(30)은 장착 개구(27)에 슬라이드 가능하게 결합되며, 커넥터(37)에 의해 단부-정지 숄더(29)에 대해 축방향으로 고정되는, 펌프 유닛. 8. The pump according to claim 6, wherein the valve housing 30 is slidably coupled to the mounting opening 27 and fixed axially with respect to the end-stop shoulder 29 by the connector 37. unit. 제5항 내지 제9항 중 어느 한 항에 있어서, 커넥터(37)는 장착 개구(27) 내에 강제 끼워맞춤 방식으로 고정되는, 펌프 유닛. 10. The pump unit according to claim 5, wherein the connector is fixed in a fitting manner in the mounting opening. 제2항 내지 제10항 중 어느 한 항에 있어서, 오버플로우 밸브(26)는 밸브 하우징(30) 내로의 연료 유입을 위한 하나의 입구(32) 및 밸브 하우징(30)으로부터의 연료 유출을 위한 하나 이상의 출구(33)를 포함하며, 장착 개구(27)는, 상기 출구(33)와 유체 연통되고 밸브 하우징(30) 및/또는 커넥터(37) 자체를 관통하여 형성된 하나 이상의 통로(39; 40, 41)를 통해 커넥터(37)와도 유체 연통되는 수집 부분(36)을 포함하는, 펌프 유닛. 11. The overflow valve 26 according to any one of the claims 2 to 10, is provided with one inlet 32 for fuel entry into the valve housing 30 and one for fuel outflow from the valve housing 30. One or more outlets 33, wherein the mounting openings 27 are in fluid communication with the outlets 33 and one or more passageways 39; 40 formed through the valve housing 30 and / or the connector 37 itself. And a collecting portion (36) in fluid communication with the connector (37) via (41). 제11항에 있어서, 상기 통로(39)는, 밸브 하우징(30) 및 커넥터(37)를 관통하여 형성되는 개구를 포함하는, 펌프 유닛. 12. The pump unit according to claim 11, wherein the passage (39) comprises an opening formed through the valve housing (30) and the connector (37). 제11항에 있어서, 상기 통로(40, 41)는 밸브 하우징(30)의 외표면에 형성되는 평활면(41)과, 상기 평활면(41)의 위치에서 밸브 하우징(30)을 관통하여 형성되는 슬릿(40)을 포함하는, 펌프 유닛. The method of claim 11, wherein the passage (40, 41) is formed through the valve housing 30 at the position of the smooth surface 41 and the smooth surface 41 formed on the outer surface of the valve housing (30) A pump unit comprising a slit (40) to be.
KR1020137026396A 2011-04-08 2012-03-06 Pump unit for supplying fuel, preferably diesel oil, from a containing tank to an internal combustion engine KR101900981B1 (en)

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ITMI2011A000582 2011-04-08
IT000582A ITMI20110582A1 (en) 2011-04-08 2011-04-08 PUMPING GROUP FOR FOOD FUEL, PREFERIBLY GASOIL, FROM A CONTAINMENT TANK TO AN INTERNAL COMBUSTION ENGINE
PCT/EP2012/053774 WO2012136429A1 (en) 2011-04-08 2012-03-06 Pump unit for supplying fuel, preferably diesel oil, from a containing tank to an internal combustion engine

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KR101900981B1 KR101900981B1 (en) 2018-09-20

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CN103477065B (en) 2016-11-16
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