US20090095571A1 - High pressure oil manifold for a diesel engine - Google Patents
High pressure oil manifold for a diesel engine Download PDFInfo
- Publication number
- US20090095571A1 US20090095571A1 US11/873,045 US87304507A US2009095571A1 US 20090095571 A1 US20090095571 A1 US 20090095571A1 US 87304507 A US87304507 A US 87304507A US 2009095571 A1 US2009095571 A1 US 2009095571A1
- Authority
- US
- United States
- Prior art keywords
- oil
- reservoir
- entrance
- manifold
- outlet tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
-
- 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
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
- F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
- F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/02—Arrangements of lubricant conduits
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
Definitions
- This invention relates to internal combustion engines, particularly to diesel engines that power motor vehicles.
- the entrances of the cast-in goosenecks had circular cross sections at the reservoir. A certain minimum wall thickness and a corresponding amount of metal were needed at and adjacent those locations in order to endow the manifold with sufficient strength to assure that stresses in the metal did not exceed specified limits.
- the inventors have discovered that a differently shaped entrance to a cast-in outlet tube from the reservoir can provide significant weight reduction without compromising compliance with the relevant specification for the oil manifold.
- the inventors have confirmed this by comparative stress analysis. In a particular example, a weight reduction of about five pounds of iron was achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
A cast oil manifold (10) has entrance openings (28) from a reservoir (18) to cast-in gooseneck outlet tubes (16) that are substantially elliptical, enabling less material to be used in the vicinity in comparison to the amount of material used when the openings are circular.
Description
- This invention relates to internal combustion engines, particularly to diesel engines that power motor vehicles.
- A known diesel engine comprises a processor-based engine controller that processes data from various sources to develop control data for controlling certain functions of the engine, including fueling of the engine by injection of fuel into engine combustion chambers. Such an engine has an oil pump that delivers oil under pressure to an oil rail, or oil manifold, serving electric-actuated fuel injection devices (fuel injectors), that use oil from the oil rail to force injections of fuel. The pressure at the oil rail is sometimes referred to as injection control pressure, or ICP, and that pressure is under the control of an appropriate ICP control strategy that is an element of the overall engine control strategy implemented in the engine control system.
- Certain fuel injectors contain electric-actuated valves that control the delivery of pressurized oil in an oil rail to pistons that are stroked when the valves open to force fuel into the engine combustion chambers via plungers. Certain fuel injectors are capable of amplifying ICP to develop very high injection pressures.
- In order to contain high-pressure oil, an oil manifold is typically a metal casting of suitable shape that is machined at certain locations in order to mate it with other parts of the engine with which it is associated. A typical casting comprises a reservoir having one or more entrances into which oil is pumped to achieve desired ICP. At locations along its length, the casting has outlet tubes through which oil is sourced from the reservoir to the fuel injectors. In a certain oil manifold the cast-in outlet tubes are goosenecks that wrap around portions of the wall that encloses the reservoir.
- Before the present invention, the entrances of the cast-in goosenecks had circular cross sections at the reservoir. A certain minimum wall thickness and a corresponding amount of metal were needed at and adjacent those locations in order to endow the manifold with sufficient strength to assure that stresses in the metal did not exceed specified limits.
- However, thicker walls sections at certain locations of a cast part sometimes make the manufacture of the part more difficult, and the part, as cast, may contain some porosities at those locations. As one would expect, the added material increases the weight of the part, and that increase has unfavorable implications on part cost, and also on vehicle weight when the engine is used in a motor vehicle.
- The inventors have discovered that a differently shaped entrance to a cast-in outlet tube from the reservoir can provide significant weight reduction without compromising compliance with the relevant specification for the oil manifold. The inventors have confirmed this by comparative stress analysis. In a particular example, a weight reduction of about five pounds of iron was achieved.
- Briefly, the present invention is embodied in a cast oil manifold by making the entrance openings from the reservoir to the cast-in outlet tubes substantially elliptical, rather than circular. The passages running through the outlet tubes follow a curved path, transitioning along the path from substantially elliptical entrances to circular exits that lead to fuel injectors at the engine cylinders. Each outlet tube presents the outward appearance of a gooseneck wrapping around a portion of the circumference of the body of the manifold that contains the reservoir.
- One generic aspect of the invention relates to a diesel engine comprising combustion chambers that are fueled by introducing pressurized oil into fuel injectors to cause the fuel injectors to inject fuel and a cast oil manifold comprising a walled body enclosing a reservoir for holding pressurized oil and cast-in outlet tubes through which oil in the reservoir is delivered to the fuel injectors.
- The cast-in outlet tubes comprise walls that wrap around portions of the walled body. Each outlet tube has an entrance at the reservoir and an exit leading to a respective fuel injector. Each entrance has a substantially elliptical transverse cross section.
- Another generic aspect relates to the oil manifold that has been described.
- The foregoing, along with further features and advantages of the invention, will be seen in the following disclosure of a preferred embodiment of the invention depicting the best mode contemplated at this time for carrying out the invention. This specification includes drawings, now briefly described as follows.
-
FIG. 1 is a perspective view of an oil manifold embodying principles of the present invention. -
FIG. 2 is a perspective view of the oil manifold from a different direction. -
FIG. 3 is an enlarged cross section view generally in the direction of arrows 3-3 inFIG. 1 . -
FIG. 4 is an enlarged end view generally in the direction ofarrow 4 inFIG. 1 showing approximately an upper half portion of the oil manifold. -
FIG. 1 shows anoil manifold 10 that mounts on an underlying portion of aninternal combustion engine 12, the engine being only schematically indicated. This particular oil manifold is designed to mount on an in-line, six-cylinder diesel engine. -
Oil manifold 10 is a cast iron part that comprises anelongate body 14 and a series of six cast-ingoosenecks 16 at spaced apart locations along the length ofbody 14. A generallycylindrical reservoir 18 runs lengthwise throughbody 14 along alongitudinal axis 20.FIG. 3 shows one lengthwise end to have anentrance 22 that is communicated by piping (not shown) to an oil pump (also not shown) that pumps oil intoreservoir 18. Although the drawings show the opposite end ofbody 14 to be open because they showmanifold 10 as cast and thereafter machined, it should be understood that the opposite end is either plugged in any suitably appropriate way. - Two series of
bosses body 14. Headed screws (not shown) pass through these bosses and thread into holes inengine 12 to fasten the oil manifold to the engine. - Goosenecks 16 form cast-in outlet tubes through which oil in
reservoir 18 is delivered to fuel injectors that are schematically shown by thereference numerals 34 inFIG. 2 . The walls of the goosenecks wrap around portions ofbody 14, and each gooseneck comprises a passageway having anentrance 28 at reservoir and anexit 30 leading to arespective fuel injector 34. - As shown in
FIG. 3 , eachentrance 28 has a substantially elliptical transverse cross section with the major axis of the ellipse of each entrance being perpendicular toaxis 20 and spanning a distance indicated by thereference numeral 32 inFIG. 4 . Eachexit 30 has a circular transverse cross section. - As
oil manifold 10 is viewed radial toaxis 20,entrance 28 of eachgooseneck 16 is offset from therespective exit 30 along the length ofbody 14. Eachentrance 28 is arranged such that an imaginary line passing through the center of its substantially elliptical transverse cross section perpendicularly intersectsaxis 20. - When the control valve associated with a
fuel injector 34 is opened, pressurized oil inreservoir 18 creates flow through therespective gooseneck 16 and into the respective fuel injector to force an injection of fuel into the respective combustion chamber. -
Oil manifold 10 is manufactured by standard sand casting methods, and after casting, is machined by standard machining techniques for proper fitting toengine 12. - Stress analysis has shown that in comparison to the prior circular cross section of an entrance, an elliptical shape that has been described here and that has about a 10.7% larger open area enables less material to be used in the vicinity of the beginning of the gooseneck while maintaining compliance with the relevant specification for the cast manifold. In the case of the illustrated oil manifold, a savings of approximately five pounds was achieved. It was also discovered that ellipse ratios (long axis length divided by short axis length) in the range of 1.2-1.4 generally perform better than others.
- While a presently preferred embodiment of the invention has been illustrated and described, it should be appreciated that principles of the invention apply to all embodiments falling within the scope of the following claims.
Claims (8)
1. A diesel engine comprising:
combustion chambers that are fueled by introducing pressurized oil into fuel injectors to cause the fuel injectors to inject fuel,
and a cast oil manifold comprising a walled body enclosing a reservoir for holding pressurized oil and cast-in outlet tubes through which oil in the reservoir is delivered to the fuel injectors,
the cast-in outlet tubes comprising walls that wrap around portions of the walled body, each outlet tube having an entrance at the reservoir and an exit leading to a respective fuel injector, and each entrance having a substantially elliptical transverse cross section.
2. A diesel engine as set forth in claim 1 in which the exit of each outlet tube has a circular transverse cross section.
3. A diesel engine as set forth in claim 1 in which the outlet tubes are disposed at intervals along a long dimension of the walled body, and as the oil manifold is viewed radial to that long dimension, the entrance of each outlet tube is offset from its exit in the direction of the long dimension of the walled body.
4. A diesel engine as set forth in claim 1 in which the entrance of each outlet tube is arranged such that an imaginary line passing through the center of its substantially elliptical transverse cross section perpendicularly intersects a central axis of the long dimension of the reservoir.
5. An oil manifold for a diesel engine having combustion chambers that are fueled by introducing pressurized oil into fuel injectors to cause the fuel injectors to inject fuel, the manifold comprising:
and a casting comprising a walled body enclosing a reservoir for holding pressurized oil and cast-in outlet tubes through which oil in the reservoir is delivered to the fuel injectors,
the cast-in outlet tubes comprising walls that wrap around portions of the walled body, each outlet tube having an entrance at the reservoir through which oil in the reservoir enters the outlet tube and an exit through which oil exits the casting, each entrance having a substantially elliptical transverse cross section.
6. An oil manifold as set forth in claim 5 in which the exit of each outlet tube has a circular transverse cross section.
7. An oil manifold as set forth in claim 5 in which the outlet tubes are disposed at intervals along a long dimension of the walled body, and as the oil manifold is viewed radial to that long dimension, the entrance of each outlet tube is offset from its exit in the direction of the long dimension of the walled body.
8. An oil manifold as set forth in claim 5 in which the entrance of each outlet tube is arranged such that an imaginary line passing through the center of its substantially elliptical transverse cross section perpendicularly intersects a central axis of the long dimension of the reservoir.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/873,045 US20090095571A1 (en) | 2007-10-16 | 2007-10-16 | High pressure oil manifold for a diesel engine |
EP08016720A EP2050953A3 (en) | 2007-10-16 | 2008-09-23 | High-pressure oil manifold for a diesel engine |
CA002639795A CA2639795A1 (en) | 2007-10-16 | 2008-09-24 | High-pressure oil manifold for a diesel engine |
MX2008012679A MX2008012679A (en) | 2007-10-16 | 2008-10-02 | High pressure oil manifold for a diesel engine. |
RU2008139792/06A RU2008139792A (en) | 2007-10-16 | 2008-10-08 | DIESEL ENGINE HIGH PRESSURE FUEL COLLECTOR |
BRPI0804356-6A BRPI0804356A2 (en) | 2007-10-16 | 2008-10-15 | high pressure oil sump for a diesel engine |
CNA2008101660450A CN101413468A (en) | 2007-10-16 | 2008-10-15 | High-pressure oil manifold for a diesel engine |
KR1020080101554A KR20090038832A (en) | 2007-10-16 | 2008-10-16 | High pressure oil manifold for a diesel engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/873,045 US20090095571A1 (en) | 2007-10-16 | 2007-10-16 | High pressure oil manifold for a diesel engine |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090095571A1 true US20090095571A1 (en) | 2009-04-16 |
Family
ID=39952342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/873,045 Abandoned US20090095571A1 (en) | 2007-10-16 | 2007-10-16 | High pressure oil manifold for a diesel engine |
Country Status (8)
Country | Link |
---|---|
US (1) | US20090095571A1 (en) |
EP (1) | EP2050953A3 (en) |
KR (1) | KR20090038832A (en) |
CN (1) | CN101413468A (en) |
BR (1) | BRPI0804356A2 (en) |
CA (1) | CA2639795A1 (en) |
MX (1) | MX2008012679A (en) |
RU (1) | RU2008139792A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3635239B1 (en) * | 2017-06-09 | 2021-11-24 | Wärtsilä Finland Oy | Fluid distribution element |
Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4601275A (en) * | 1982-08-23 | 1986-07-22 | General Motors Corporation | Fuel rail |
US4805575A (en) * | 1986-11-18 | 1989-02-21 | Weber S.R.L. | Fuel manifold unit with integrated pressure regulator for the fuel injection system of an internal combustion engine |
US4966120A (en) * | 1987-07-29 | 1990-10-30 | Aisan Kogyo Kabushiki Kaisha | Fuel injection system assembly |
US5074269A (en) * | 1991-04-29 | 1991-12-24 | Chrysler Corporation | Anti-rotation fuel injector clip |
US5136999A (en) * | 1989-06-06 | 1992-08-11 | Robert Bosch Gmbh | Fuel injection device for internal combustion engines |
US5163406A (en) * | 1990-08-07 | 1992-11-17 | Siemens Automotive L.P. | Intake manifold/fuel rail |
US5176121A (en) * | 1992-04-06 | 1993-01-05 | Siemens Automotive Limited | Bumpers for protecting an O-ring seal of a fuel injector during the injector's insertion into a socket |
US5197435A (en) * | 1992-08-13 | 1993-03-30 | Walbro Corporation | Molded fuel injection rail |
US5390638A (en) * | 1994-02-25 | 1995-02-21 | Siemens Automotive L.P. | Fuel rail assembly |
US5513613A (en) * | 1994-07-15 | 1996-05-07 | Ford Motor Company | Automotive fuel rail end closure device with temperature sensor for returnless fuel system |
US5531202A (en) * | 1995-07-18 | 1996-07-02 | Siemens Automotive Corporation | Fuel rail assembly having internal electrical connectors |
US6223726B1 (en) * | 1996-06-30 | 2001-05-01 | Robert Bosch Gmbh | High pressure fuel reservoir |
US6227170B1 (en) * | 1999-09-29 | 2001-05-08 | Kojin, Ltd. | Engine fuel rail and method of fabricating same |
US6311673B1 (en) * | 1999-03-16 | 2001-11-06 | Honda Kogyo Kabushiki Kaisha | Fuel injection device |
US6619264B2 (en) * | 2000-10-25 | 2003-09-16 | Siemens Vdo Automotive Inc. | Lost core fuel rail with attachment features |
US6626152B1 (en) * | 2000-09-19 | 2003-09-30 | Delphi Technologies, Inc. | Fuel rail |
US7252071B2 (en) * | 2005-03-30 | 2007-08-07 | Delaware Capital Formation, Inc. | Fuel rail |
US7523741B2 (en) * | 2005-03-30 | 2009-04-28 | Kurz - Kasch, Inc. | Fuel rail |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5297523A (en) * | 1993-02-26 | 1994-03-29 | Caterpillar Inc. | Tuned actuating fluid inlet manifold for a hydraulically-actuated fuel injection system |
US5325834A (en) * | 1993-08-03 | 1994-07-05 | Caterpillar Inc. | Method of and conversion kit for converting an engine to hydraulically-actuated fuel injection system |
GB2337082A (en) * | 1998-05-09 | 1999-11-10 | Perkins Engines Co Ltd | An i.c engine fuel injection system having a reservoir for actuating fluid |
DE10261737A1 (en) * | 2002-12-30 | 2004-07-08 | Robert Bosch Gmbh | Component subject to internal pressure, in particular for fuel injection for internal combustion engines with a high-pressure fuel pump |
-
2007
- 2007-10-16 US US11/873,045 patent/US20090095571A1/en not_active Abandoned
-
2008
- 2008-09-23 EP EP08016720A patent/EP2050953A3/en not_active Withdrawn
- 2008-09-24 CA CA002639795A patent/CA2639795A1/en not_active Abandoned
- 2008-10-02 MX MX2008012679A patent/MX2008012679A/en not_active Application Discontinuation
- 2008-10-08 RU RU2008139792/06A patent/RU2008139792A/en unknown
- 2008-10-15 CN CNA2008101660450A patent/CN101413468A/en active Pending
- 2008-10-15 BR BRPI0804356-6A patent/BRPI0804356A2/en not_active Application Discontinuation
- 2008-10-16 KR KR1020080101554A patent/KR20090038832A/en not_active Application Discontinuation
Patent Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4601275A (en) * | 1982-08-23 | 1986-07-22 | General Motors Corporation | Fuel rail |
US4805575A (en) * | 1986-11-18 | 1989-02-21 | Weber S.R.L. | Fuel manifold unit with integrated pressure regulator for the fuel injection system of an internal combustion engine |
US4966120A (en) * | 1987-07-29 | 1990-10-30 | Aisan Kogyo Kabushiki Kaisha | Fuel injection system assembly |
US5136999A (en) * | 1989-06-06 | 1992-08-11 | Robert Bosch Gmbh | Fuel injection device for internal combustion engines |
US5163406A (en) * | 1990-08-07 | 1992-11-17 | Siemens Automotive L.P. | Intake manifold/fuel rail |
US5074269A (en) * | 1991-04-29 | 1991-12-24 | Chrysler Corporation | Anti-rotation fuel injector clip |
US5176121A (en) * | 1992-04-06 | 1993-01-05 | Siemens Automotive Limited | Bumpers for protecting an O-ring seal of a fuel injector during the injector's insertion into a socket |
US5197435A (en) * | 1992-08-13 | 1993-03-30 | Walbro Corporation | Molded fuel injection rail |
US5390638A (en) * | 1994-02-25 | 1995-02-21 | Siemens Automotive L.P. | Fuel rail assembly |
US5513613A (en) * | 1994-07-15 | 1996-05-07 | Ford Motor Company | Automotive fuel rail end closure device with temperature sensor for returnless fuel system |
US5531202A (en) * | 1995-07-18 | 1996-07-02 | Siemens Automotive Corporation | Fuel rail assembly having internal electrical connectors |
US6223726B1 (en) * | 1996-06-30 | 2001-05-01 | Robert Bosch Gmbh | High pressure fuel reservoir |
US6311673B1 (en) * | 1999-03-16 | 2001-11-06 | Honda Kogyo Kabushiki Kaisha | Fuel injection device |
US6227170B1 (en) * | 1999-09-29 | 2001-05-08 | Kojin, Ltd. | Engine fuel rail and method of fabricating same |
US6626152B1 (en) * | 2000-09-19 | 2003-09-30 | Delphi Technologies, Inc. | Fuel rail |
US6619264B2 (en) * | 2000-10-25 | 2003-09-16 | Siemens Vdo Automotive Inc. | Lost core fuel rail with attachment features |
US7252071B2 (en) * | 2005-03-30 | 2007-08-07 | Delaware Capital Formation, Inc. | Fuel rail |
US7523741B2 (en) * | 2005-03-30 | 2009-04-28 | Kurz - Kasch, Inc. | Fuel rail |
Also Published As
Publication number | Publication date |
---|---|
MX2008012679A (en) | 2009-05-08 |
EP2050953A3 (en) | 2010-04-21 |
BRPI0804356A2 (en) | 2009-06-16 |
CA2639795A1 (en) | 2009-04-16 |
EP2050953A2 (en) | 2009-04-22 |
RU2008139792A (en) | 2010-04-20 |
KR20090038832A (en) | 2009-04-21 |
CN101413468A (en) | 2009-04-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GNESIN, ALEXANDER L.;GRIFFIN, GREGORY A.;REEL/FRAME:019970/0013 Effective date: 20071001 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |