Patent US5033506A successfully refreshed from Google Patents.
US5033506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delivery valve
Assignee: Robert Bosch GmbH
•
Filing: 1989-08-16
•
Granted: 1991-07-23
•
Expires: 2009-08-16
Abstract
Abstract A delivery valve for controlling fuel flow from a fuel-injection pump to an internal combustion engine and comprising a seat member, a closing member movable relative to the seat member for controlling flow of fuel through the passage channel of the seat member, and a spring for biasing the closing member into engagement with a valve seat on the seat member. The closing member includes a return-flow collar sealingly displaceable in the passage channel and located outside of the passage channel in an open position of the delivery valve, and a control collar located closely adjacent to the return-flow collar. The control collar has a diameter corresponding to a diameter of the passage channel, a periphery and at least one recess formed on the periphery and extending along an entire length of the control collar. The one recess has a variable cross-sectional area defining with a delivery edge of the passage channel a connecting flow cross-sectional area between a working chamber of the fuel injection pump and a conduit for delvery fuel to the fuel injection point. The size of the variable cross-sectional area is so selected that the connecting flow cross-sectional area increases with an increase in a fuel delivery rate upon displacement of the closing member against bias of the compression spring until the connection flow cross-sectional area becomes equal to maximum size of the variable cross-sectional area of the recess.
Inventors
- 👤 Guenter Bofinger
- 👤 Manfred Narr-Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:23
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/44; F02M59/46; F02M59/462; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7866; Y10T137/7867; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7939
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
264 words
A delivery valve for controlling fuel flow from a fuel-injection pump to an internal combustion engine having a fuel injection point, said delivery valve comprising a seat member having a valve seat and a passage channel defining a delivery edge; a closing member movable relative to said valve seat for controlling flow of fuel through said passage channel; and a spring for biasing said closing member into engagement with said valve seat, said closing member including a collar subdivided into a return-flow collar and a control collar, said return-flow collar being sealingly displacealbe in said passage channel, extending into said passage channel in a closed position of said delivery valve, and located outside of said passage channel in a open position of said delivery valve, and said control collar being located adjacent to said return-flow collar and having a diameter corresponding to a diameter of said passage channel, said control collar also having a periphery and at least one recess formed on said periphery and extending along an entire length of said control collar, said at least one recess having a variable cross-sectional area defining with said delivery edge a connecting flow cross-section area between a working chamber of the fuel injection pump and a conduit for delivery fuel to the fuel injection point the size of said variable cross-sectional area of said recess being so selected that it is smaller than at least the maximum size of said connecting flow cross-sectional area increasing with an increase in a fuel delivery rate upon displacement of said closing member against bias of said compression spring.
Claim 2
Dependent Claim
264 words
A delivery valve for controlling fuel flow from a fuel-injection pump to an internal combustion engine having a fuel injection point, said delivery valve comprising a seat member having a valve seat and a passage channel defining a delivery edge; a closing member movable relative to said valve seat for controlling flow of fuel through said passage channel; and a spring for biasing said closing member into engagement with said valve seat, said closing member including a collar subdivided into a return-flow collar and a control collar, said return-flow collar being sealingly displacealbe in said passage channel, extending into said passage channel in a closed position of said delivery valve, and located outside of said passage channel in a open position of said delivery valve, and said control collar being located adjacent to said return-flow collar and having a diameter corresponding to a diameter of said passage channel, said control collar also having a periphery and at least one recess formed on said periphery and extending along an entire length of said control collar, said at least one recess having a variable cross-sectional area defining with said delivery edge a connecting flow cross-section area between a working chamber of the fuel injection pump and a conduit for delivery fuel to the fuel injection point the size of said variable cross-sectional area of said recess being so selected that it is smaller than at least the maximum size of said connecting flow cross-sectional area increasing with an increase in a fuel delivery rate upon displacement of said closing member against bias of said compression spring.
Claim 3
Dependent Claim
29 words
A delivery valve as set forth in claim 1, wherein the maximum size of said variable cross-sectional area is substantially equal to a cross-sectional area of the delivery conduit.
Claim 4
Dependent Claim
32 words
A delivery valve as set forth in claim 1, wherein said recess has a peripheral surface which is substantially smaller than the maximum size of said variable cross-sectional area of said recess.
Claim 5
Dependent Claim
37 words
A delivery valve as set forth in claim 1, wherein at a maximum delivery rate, at least a portion of said control collar and a portion of a length of said recess remain in said passage channel.
Claim 6
Dependent Claim
101 words
A delivery valve as set forth in claim 1, wherein said closing member has a head having a sealing surface for engaging said valve seat, said return-flow and control collars being formed on a portion of said closing member than extends from said sealing surface and into said passage channel, said closing member further including a guide portion formed adjacent to said control collar and having on an outer peripheral surface thereof a plurality of ribs forming a plurality of slots therebetween, one of said plurality of slots extending over an entire length of said control collar and defining said recess.
Claim 7
Dependent Claim
75 words
A delivery valve as set forth in claim 3, wherein said closing member has a head having a sealing surface for engaging said valve seat and a cylindrical portion extending from said sealing surface into said passage, and forming said return-flow collar adjacent to said sealing surface and said control collar which is arranged on a side of said return-flow collar remote from said sealing surface and defines a guide portion of said closing member.
Claim 8
Dependent Claim
22 words
A delivery valve as set forth in claim 1, wherein said recess is defined by a ground portion of said control member.
Claim 9
Dependent Claim
26 words
A delivery valve as set forth in claim 7, wherein said variable cross-sectional area increases to an end of said recess remote from said delivery edge.
Claim 10
Dependent Claim
33 words
A delivery valve as set forth in claim 7, wherein said recess is a stepped recess a cross-sectional area of which increases to an end of said recess remote from said delivery edge.
References Cited (Backward Citations)
US2792846A
Cited
GB789234A
Cited
US2922581A
Cited
DE2306270A1
Cited
US3965876A
Cited
US4467767A
Cited
US4577606A
Cited
US4648369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |