Fuel supply system for an internal combustion engine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02M-055/02
F02M-037/00
F16L-047/24
F02M-055/00
F16L-025/10
F16L-023/00
F02M-055/04
출원번호
US-0387529
(2010-07-02)
등록번호
US-8851051
(2014-10-07)
우선권정보
IT-MI2009A1355 (2009-07-29)
국제출원번호
PCT/EP2010/059468
(2010-07-02)
§371/§102 date
20120215
(20120215)
국제공개번호
WO2011/012402
(2011-02-03)
발명자
/ 주소
Ziegler, Thomas
Motolese, Giuseppe
출원인 / 주소
Robert Bosch GmbH
대리인 / 주소
Michael Best & Friedrich LLP
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
System for supplying fuel from a tank (2) to a manifold (5) that distributes fuel into an engine (3); the system (1) having a pumping unit which connects together the tank (2) and the manifold (5) and has a fluid line (11) with a first or low-pressure portion (P1), a second or high-pressure portion
System for supplying fuel from a tank (2) to a manifold (5) that distributes fuel into an engine (3); the system (1) having a pumping unit which connects together the tank (2) and the manifold (5) and has a fluid line (11) with a first or low-pressure portion (P1), a second or high-pressure portion (P2), a high-pressure pump (9) connecting together the first and second portions (P1, P2); the first portion (P1) having a plurality of low-pressure branches (23-28, 30-34), a plurality of fluid components (8, 13, 21, 29, 231, 232, 233, 241, 242, 251, 261, 271, 311), each of which has at least one connector (36) and at least one tubular coupling (40; 140; 340; 440), which latter is inserted partly into the connector (36) and partly into a low-pressure branch (23-28; 30-34); each coupling (40; 140; 340; 440) having a plastic tubular body (145; 345; 445).
대표청구항▼
1. A fuel supply system for an internal-combustion engine (3) in which the system (1) comprises a fuel supply tank (2), a fuel distribution manifold (5), and a pumping unit (6) which connects together the fuel supply tank (2) and the fuel distribution manifold (5); the pumping unit (6) comprising a
1. A fuel supply system for an internal-combustion engine (3) in which the system (1) comprises a fuel supply tank (2), a fuel distribution manifold (5), and a pumping unit (6) which connects together the fuel supply tank (2) and the fuel distribution manifold (5); the pumping unit (6) comprising a fluid line (11) having a first, low-pressure portion (P1), a second, high-pressure portion (P2), a high-pressure pump (9) connecting together the first and second portions (P1, P2), and a pre-supply pump (8) connected to the first portion (P1); and the first portion (P1) comprising a plurality of low-pressure branches (23-28, 30-34), a plurality of fluid components (8, 13, 21, 29, 231, 232, 233, 241, 242, 251, 261, 271, 311), each of which has at least one connector (36) and at least one tubular coupling (40; 140; 340; 440), which tubular coupling is inserted partly into the connector (36) and partly into one of said low-pressure branches (23-28; 30-34) to connect together the component (8; 13; 21; 29; 231; 232; 233; 241; 242; 251; 261; 271; 311) and the low-pressure branch (23-28; 30-34); the system (1) being characterized in that each coupling (40; 140; 340; 440) comprises a plastic tubular body (145; 345; 445), sealing means (41; 141; 341; 441) interposed between the tubular body (145; 345; 445) and the corresponding connector (36), and means (42; 142; 342; 453) for axial locking of the tubular body (145; 345; 445) with respect to its connector (36) in a defined axial position, each coupling (40; 140; 340; 440) comprising axial stop means (44; 144; 351; 451) for the tubular body (145; 345; 445) with respect to its connector (36) in said defined axial position, the connector (36) having an end surface (38) and a cylindrical housing (39) which begins at the end surface (38) and houses part of its coupling (40; 140;340; 440), the sealing means (41; 141; 341; 441) and the locking means (42; 142; 342; 453), the cylindrical housing (39) having an annular groove (45), the axial locking means (42; 142; 342; 453) being snap-action locking means (453) engaging with said groove (45) and being made in one piece with the tubular body (445). 2. The system according to claim 1, in which said stop means (44; 144; 351; 451) comprise, on the coupling (40; 140; 340; 440), an annular shoulder (43) that interacts with the end surface (38) of the connector (36). 3. The system according to claim 1, in which the axial locking means (42; 142; 342; 442) are interference-fit means on the tubular body (145; 345; 445) that engage with the cylindrical housing (39). 4. The system according to claim 3, in which the axial locking means (142; 342) are made of metal. 5. The system according to claim 3, in which the axial locking means (142; 342) comprise a sleeve mounted in a fixed position on the tubular body (145; 345) and projecting radially outwards from said tubular body (145; 345). 6. The system according to claim 2, in which said shoulder (43) is formed on a sleeve mounted in a fixed position on the tubular body (145; 345) and projecting radially outwards from said tubular body (145; 345). 7. The system according to claim 3, in which the axial locking means (442) comprise an annulus of elastically deformable teeth (453) projecting radially outwards from the tubular body (445). 8. The system according to claim 1, in which the snap-action locking means (442) are made of plastic. 9. The system according to claim 1, in which the tubular body (145; 345; 445) is straight. 10. The system according to claim 1, in which the tubular body (145; 345; 445) is bent essentially into an L shape. 11. A coupling for connecting a fluid component (8; 13; 21; 29; 231; 232; 233; 241; 242; 251; 261; 271; 311) to a low-pressure branch (23-28, 30-34) of a fuel supply system (1) of an internal-combustion engine (3), the fluid component (8; 13; 21; 29; 231; 232; 233; 241; 242; 251; 261; 271; 311) having a connector (36), the coupling (40; 140; 340; 440) comprising: a plastic tubular body (145; 345; 445);a sealing arrangement (41; 141; 341; 441) interposed between the tubular body (145; 345; 445) and the connector (36); andan axial locking arrangement (42; 142; 342; 453) for axial locking of the tubular body (145; 345; 445) with respect to the connector (36) in a defined axial position, each coupling (40; 140; 340; 440) comprising an axial stop arrangement (44; 144; 351; 453) for the tubular body (145; 345; 445) with respect to its connector (36) in said defined axial position, the connector (36) having an end surface (38) and a cylindrical housing (39) which begins at the end surface (38) and houses part of its coupling (40; 140; 340; 440), the sealing arrangement (41; 141; 341; 441) and the axial locking arrangement (42; 142; 342; 453), the cylindrical housing (39) having an annular groove (45), the axial locking arrangement (42; 142; 342; 453) being a snap-action arrangement (453) engaging with said groove (45) and being made in one piece with the tubular body (445). 12. The coupling according to claim 11, in which the stop arrangement (44; 144; 351; 451) comprises, on the coupling (40; 140; 340; 440), an annular shoulder (43) that interacts with an end surface (38) of the connector (36). 13. The coupling according to claim 12, in which the annular shoulder (43) is formed on a sleeve mounted in a fixed position on the tubular body (145; 345) and projecting radially outwards from said tubular body (145; 345). 14. The coupling according to claim 11, in which the axial locking arrangement (142; 342) comprises a sleeve mounted in a fixed position on the tubular body (145; 345) and projecting radially outwards from said tubular body (145; 345). 15. The coupling according to claim 11, in which the axial locking arrangement (442) comprises an annulus of elastically deformable teeth (453) projecting radially outwards from the tubular body (445). 16. A fuel supply system for an internal-combustion engine (3) in which the system (1) comprises a fuel supply tank (2), a fuel distribution manifold (5), and a pumping unit (6) which connects together the fuel supply tank (2) and the fuel distribution manifold (5); the pumping unit (6) comprising a fluid line (11) having a first, low-pressure portion (P1), a second, high-pressure portion (P2), a high-pressure pump (9) connecting together the first and second portions (P1, P2), and a pre-supply pump (8) connected to the first portion (P1); and the first portion (P1) comprising a plurality of low-pressure branches (23-28, 30-34), a plurality of fluid components (8, 13, 21, 29, 231, 232, 233, 241, 242, 251, 261, 271, 311), each of which has at least one connector (36) and at least one tubular coupling (40; 140; 340; 440), which tubular coupling is inserted partly into the connector (36) and partly into one of said low-pressure branches (23-28; 30-34) to connect together the component (8; 13; 21; 29; 231; 232; 233; 241; 242; 251; 261; 271; 311) and the low-pressure branch (23-28; 30-34); the system (1) being characterized in that each coupling (40; 140; 340; 440) comprises a plastic tubular body (145; 345; 445), sealing means (41; 141; 341; 441) interposed between the tubular body (145; 345; 445) and the corresponding connector (36), and means (42; 142; 342; 442) for axial locking of the tubular body (145; 345; 445) with respect to its connector (36) in a defined axial position, in which the axial locking means (442) are snap-action locking means (453) that include an annulus of elastically deformable teeth (453) projecting radially outwards from the tubular body (445). 17. The system according to claim 16, in which said stop means (44; 144; 351; 451) comprise, on the coupling (40; 140; 340; 440), an annular shoulder (43) that interacts with the end surface (38) of the connector (36). 18. The system according to claim 16, in which the axial locking means (42; 142; 342; 442) are interference-fit means on the tubular body (145; 345; 445) that engage with the cylindrical housing (39). 19. The system according to claim 18, in which the axial locking means (142; 342) are made of metal. 20. The system according to claim 18, in which the axial locking means (142; 342) comprise a sleeve mounted in a fixed position on the tubular body (145; 345) and projecting radially outwards from said tubular body (145; 345).
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