GB2308157A - Fuel injection system for i.c. engines with actuating fluid accumulator - Google Patents
Fuel injection system for i.c. engines with actuating fluid accumulator Download PDFInfo
- Publication number
- GB2308157A GB2308157A GB9621406A GB9621406A GB2308157A GB 2308157 A GB2308157 A GB 2308157A GB 9621406 A GB9621406 A GB 9621406A GB 9621406 A GB9621406 A GB 9621406A GB 2308157 A GB2308157 A GB 2308157A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pump
- actuating
- fluid
- manifold
- fuel system
- 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.)
- Granted
Links
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
- 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
- F02M59/105—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 hydraulic drive
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/04—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation
-
- 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
- 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
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
FUEL SYSTEM HAVING
ACTUATING FLUID ACCUMULATOR RESERVOIR
The present invention relates to a fuel system of a fuel injected engine and, more particularly, to a fuel injection actuating fluid system employing an actuating fluid accumulator reservoir.
In the construction of diesel engines, particularly diesel engines of earthworking machines, space is severely limited for locating and positioning various components of and associated with the engine. It has also been a problem to maintain actuating fluid lines which drive hydraulically actuated fuel injectors in a filled state during extended periods of engine shut down and/or engine shutdown for any time period during cold weather, and quickly supply actuating fluid to the high pressure actuating fluid pump during engine startup. During such times, actuating fluid occasionally drains out of the actuating fluid system and/or the volume of actuating fluid decreases in response to cooling thereof.This actuating fluid volume reduction and slow supply of actuating fluid to the actuating fluid pump can result in the introduction of air into the system and slow pressurization of the actuating fluid, leading to an undesirable increase in engine cranking time prior to engine operation. To overcome these problems, a sufficient quantity of actuating fluid must be supplied to the system and pump during actuating fluid cooldown and during engine startup so that sufficient actuating fluid pressure can be developed to effectively drive the fuel injectors and cause fuel to be injected into the engine's combustion chamber(s) to facilitate engine startup.
US-A-5,213,083, discloses a hydraulically actuated fuel injection system including a high pressure actuating fluid pump for developing high actuating fluid pressure for driving hydraulically actuated fuel injectors and a priming reservoir arranged in fluid communication between a sump and an inlet of that pump. The priming reservoir primes and thereby facilitates rapid pressurization of the high pressure pump during engine start-up so that extended engine cranking times are avoided. In addition, means are provided for automatically making up or replenishing voids in the actuating fluid manifolds supplied by the pump due to cooling and contraction of actuating fluid and/or precipitation of entrained air from the actuating fluid.
Such means comprises an actuating fluid siphon passage which bypasses the inlet of the pump and is connected between the priming reservoir and the manifolds through a check valve.
While the fuel injection system disclosed in
US-A-5213083 is effective to limit cranking times, it is necessary that the lowest level of the actuating fluid in the reservoir be higher than the pump inlet. In installations where sufficient space above the pump mounting location and actuating fluid manifolds is not available or in a situation where the pump mounting location is at a low elevation compared to the engine's fuel injectors, the system disclosed in US-A-5213083 may not be suitable.
In accordance with one aspect of the present invention, a fuel system for a fuel injected engine includes a fuel injector which is actuatable by an actuating fluid, a pump for pressurizing actuating fluid, a manifold providing fluid communication between the pump and the fuel injector for transmitting pressurized actuating fluid from the pump to the fuel injector, and an accumulator reservoir in fluid communication with the manifold and the pump for supplying pressurized actuating fluid to the manifold and the pump.
Preferably, a check valve is coupled between the manifold and the accumulator reservoir. Also preferably, the accumulator reservoir is connected to and charged by an actuating fluid transfer pump.
In accordance with another aspect of the present invention, a hydraulically-actuated fuel system for a diesel engine having a plurality of fuel injectors each of which is actuatable by an actuating fluid includes a high pressure pump operable when the engine is operating for pressurizing actuating fluid, a manifold in fluid communication with the pump and the fuel injectors for transmitting pressurized actuating fluid from the pump to the fuel injectors, and an accumulator reservoir in fluid communication with the pump and the manifold for supplying pressurized actuating fluid to the manifold when the pump is not operating and for supplying pressurized actuating fluid to the pump during pump operation.
In accordance with yet another aspect of the present invention, a hydraulically-actuated fuel system for a diesel engine having a plurality of fuel injectors each of which is actuatable by high pressure engine oil when the engine is operating includes a high pressure pump operable when the engine is running for pressurizing engine oil, a manifold for receiving high pressure engine oil from the pump during pump operation and from an accumulator reservoir when the pump is not operating, and a rail pressure control valve for controlling the pressure of engine oil delivered by the pump to the manifold, and a check valve for obstructing engine oil flow from the manifold to the accumulator reservoir.
The present invention reduces engine cranking times by providing actuating fluid as required to an actuating fluid pump and to an actuating fluid manifold and is suitable for installation in locations where sufficient space above the pump mounting location and/or the manifold is unavailable or where the pump mounting location is physically low compared to the manifold. Further, as compared to systems whose reservoir is integral with the high pressure pump, the complexity of the oil pump is advantageously reduced.
In the accompanying drawings:
Fig. 1 is a diagrammatic view of a first embodiment of the fuel system of the present invention; and
Fig. 2 is a diagrammatic view of a second embodiment of the fuel system of the present invention.
Referring to the Fig. 1, a fuel injected engine, preferably a diesel engine, includes a fuel system 10 having a high pressure actuating fluid pump 12 fluidly connected on its inlet side 14 to an accumulator reservoir 16 and fluidly connected on its outlet side 18 to a high pressure actuating fluid manifold 20. As is known in the art, the manifold 20 is fluidly connected to a plurality of fuel injectors 22-28 for controllably actuating same to supply fuel to a like number of combustion chambers (not shown) of the engine. While four fuel injectors 22-28 for supplying fuel to four associated combustion chambers are shown in the Figs., the engine may include only one or some different number of fuel injectors and associated combustion chambers.Further, one or more additional manifolds may be provided wherein each manifold supplies fuel to a portion of the total number of fuel injectors of the engine, if desired. It is to be understood that the manifold 20 may be directly connected to the pump 12 or may, as shown, be connected to the pump 12 by a significant length of conduit. For purposes of this invention the term "manifold" shall be understood to encompass such length of conduit and any conduit necessary to connect the manifold 20 to the fuel injectors 22-28.
A low pressure, actuating fluid transfer pump 30 is fluidly connected at its inlet side 32 to an actuating fluid sump 34 and at its outlet side 36 through a check valve 38 to the accumulator reservoir 16. For the sake of brevity, simplicity, and maintenance of invention focus, certain details, not pertinent to the present invention, in the actuating fluid's path between the transfer pump 30 and check valve 38 have been omitted. Since the actuating fluid preferably constitutes engine lubricating oil, the sump 34 preferably comprises the utilizing engine's oil sump.
A rail pressure control valve (RPCV) 40 is disposed in fluid communication with the pump 12 and the manifold 20 and controls the pressure of the pump-supplied actuating fluid in the manifold 20 by diverting a portion of the pump pressurized actuating fluid pressurized through a drain check valve 42 to the sump 34. The RPCV typically modulates the actuating fluid pressure to adjust fuel injection pressure in response to signals from an electronic control module (not shown). A pressure relief check valve 44 permits fluid communication between the pump outlet 18 and the sump 34 only when the manifold pressure exceeds a predetermined value which is greater than the pressure set by the RPCV.
A makeup check valve 46 permits fluid communication between the accumulator reservoir 16 and the manifold 20 only when the pressure of actuating fluid in the accumulator reservoir 16 is greater than in the manifold 20.
The fuel system 10 shown in Fig. 2 is identical to that illustrated in Fig. 1 except that the structure of the accumulator reservoir 16' illustrated in Fig. 2 is different from the structure of accumulator reservoir 16 shown in Fig. 1.
Accumulator reservoir 16 includes a fluid tight vessel 48, a moveable barrier or piston 50.which sealingly divides the interior of vessel 48 into a biasing compartment 52 and a fluid compartment 54, and biasing means 56 which preferably comprises a spring 56 which is biasingly engageable with the barrier to minimize the volume of the fluid compartment 54. The accumulator reservoir 16' preferably has the same structure as 16 except for a moveable, expandable bladder 50' replacing the piston 50.
Although a spring 56 illustratively provides the biasing force for both embodiments of the accumulator reservoir, it is to be understood that compressed fluid may, as is well known in the art, be used with equal facility. Yet another alternate embodiment of an accumulator reservoir, although not shown, is an elastomeric container which is filled with a compressible fluid at a desired pressure and which is placed in the fluid tight vessel 48. Such elastomeric container, when compressed by actuating fluid exerting force on the exterior of such container would effectively charge the accumulator reservoir 48 to a selected pressure.
Industrial Applicability As the engine operates, actuating fluid is sequentially delivered by the transfer pump 30 from the sump 34 to the accumulator reservoir 16 and then by the high pressure pump 12 to the manifold(s) 20 to pressurize the latter. During engine operation, the accumulator 16 is charged by actuating fluid overcoming the force of spring 56 to enlarge the fluid compartment 54 and decrease the biasing compartment 52.
After engine shut-down, cooling and contraction of actuating fluid and/or precipitation of entrained air from the actuating fluid can create voids in the actuating fluid resident in the manifold 20. These voids can result in engine start-up delays until the pump 12 refills such voids during engine cranking. To reduce or eliminate this problem, the manifold 20 is kept in a filled condition through makeup of actuating fluid from the accumulator reservoir 16 through the make up check valve 46.
As actuating fluid is transferred from the accumulator 16 to the manifold 20, air displaced by the actuating fluid is vented from the manifold 20 in a well known manner. The drain check valve 42 prevents venting of actuating fluid through the rail pressure control valve 40 to sump 34.
In addition to filling the aforementioned voids, the accumulator reservoir 16 provides a ready source of actuating fluid to the inlet side 14 of the high pressure pump 12 to enable that pump to immediately transmit actuating fluid to the manifold 20 upon initiating engine cranking. This maintenance of actuating fluid for the pump 12 is possible regardless of space limitations which may prevent a reservoir from being located above the pump 12.
The fuel system 10 illustrated in Fig. 2 operates identically to that shown in Fig. 1. The only difference is the means used to maintain the pressure of actuating fluid residing in the accumulator reservoirs 16,16'.
The present invention is effective to provide quick cold start-ups of the utilizing engine and is suitable for installation where only limited space above the pump's 12 location is available or where the pump is mounted at a location below the manifold 20. Specifically, use of the accumulator reservoir 16 permits the manifold 20 to be continuously charged with actuating fluid even when the engine is not running. Further, as noted above, because the accumulator reservoir 16 is pressurized, it can be located at any convenient location, including an elevation lower than the manifold 20 and/or pump 12 if desired.
The present invention also advantageously permits reduced complexity of the oil pump 12 as compared to other systems where the actuating fluid reservoir is incorporated in the pump's housing and may result in lower overall system costs.
Claims (15)
1. A fuel system for a fuel injected engine comprising:
a fuel injector which is actuatable by an actuating fluid;
an actuating pump for pressurizing actuating fluid to injector actuating pressure;
a manifold in fluid communication with the actuating pump and the fuel injector for transmitting pressurized actuating fluid from the actuating pump to the fuel injector;
an accumulator reservoir in fluid communication with the manifold and the actuating pump for supplying pressurized actuating fluid to the manifold and actuating pump.
2. The fuel system of claim 1, further comprising a check valve for regulating fluid communication between the manifold and the accumulator reservoir.
3. The fuel system of claim 1, wherein the accumulator reservoir is in fluid communication with and chargeable by a transfer pump.
4. The fuel system of claim 3 further comprising:
a check valve for obstructing actuating fluid flow from the accumulator reservoir to the transfer pump.
5. The fuel system of claim 1, wherein said accumulator reservoir comprises:
a vessel; and
means for pressurizing actuating fluid residing in said vessel.
6. The fuel system of claim 5, said pressurizing means comprising:
a barrier disposed in said vessel for separating the vessel into a biasing compartment and a fluid compartment; and
means for biasing said barrier toward decreasing the size of said fluid compartment.
7. The fuel system of claim 6, said barrier comprising one of:
a piston and a bladder.
8. The fuel system of claim 5, said pressurizing means comprising:
an elastomeric container disposed in said vessel and having compressible fluid housed therein at a selected pressure which increases when said container is compressed.
9. The fuel system of claim 1, wherein the actuating fluid comprises engine oil.
10. A hydraulically-actuated fuel system for a diesel engine having a plurality of fuel injectors each of which is actuatable by an actuating fluid when the engine is running, comprising:
a high pressure pump operable when the engine is running for pressurizing actuating fluid;
a manifold in fluid communication with the pump and the fuel injectors for transmitting pressurized actuating fluid from the pump to the fuel injectors; and
an accumulator reservoir in fluid communication with the manifold and pump for supplying pressurized actuating fluid to the manifold when the pump is not operating and for supplying pressurized actuating fluid to the pump during pump operation.
11. The hydraulically-actuated fuel system of claim 10, further comprising a pressure control valve for regulating fluid communication between said manifold and said accumulator reservoir.
12. The fuel system of claim 10, wherein the accumulator reservoir is in fluid communication with and chargable by a transfer pump.
13. The fuel system of claim 10, wherein the actuating fluid comprises engine oil.
14. A hydraulically-actuated fuel system for a diesel engine having a plurality of fuel injectors each of which is actuatable by high pressure engine oil when the engine is operating, comprising:
a high pressure pump operable when the engine is running for pressurizing engine oil;
an accumulator reservoir;
a manifold in fluid communication with said pump for receiving high pressure engine oil therefrom during said pump's operation and in fluid communication with said accumulator reservoir for receiving engine oil therefrom when said pump is not operating;
a rail pressure control valve for regulating the pressure of the pressurized engine oil;
a makeup check valve for obstructing engine oil flow from said manifold to said accumulator reservoir.
15. A hydraulically-actuated fuel system substantially as described with reference to the accompanying drawings.
15. A hydraulically-actuated fuel system substantially as described with reference to the accompanying drawings.
Amendments to the claims have been filed as follows
Claims
1. A fuel system for a fuel injected engine, the system comprising a fuel injector which is actuatable by an actuating fluid; an actuating pump for pressurizing actuating fluid to injector actuating pressure; a manifold in fluid communication with the actuating pump and the fuel injector for transmitting pressurized actuating fluid from the actuating pump to the fuel injector; and an accumulator reservoir in fluid communication with the manifold and the actuating pump for supplying pressurized actuating fluid to the manifold and actuating pump independent of the relative heights of the actuating pump, the accumulator reservoir and the manifold.
2. A fuel system according to claim 1, further comprising a check valve for regulating fluid communication between the manifold and the accumulator reservoir.
3. A fuel system according to claim 1 or claim 2, wherein the accumulator reservoir is in fluid communication with and chargeable by a transfer pump.
4. A fuel system according to any one of the preceding claims, further comprising a check valve for obstructing actuating fluid flow from the accumulator reservoir to the transfer pump.
5. A fuel system according to any one of the preceding claims, wherein the accumulator reservoir comprises: a vessel; and means for pressurizing actuating fluid residing in the vessel.
6. A fuel system according to claim 5, the pressurizing means comprising a barrier disposed in the vessel for separating the vessel into a biasing compartment and a fluid compartment; and means for biasing the barrier towards decreasing the size of the fluid compartment.
7. A fuel system according to claim 6, the barrier being either a piston or a bladder.
8. A fuel system according any one of claims 1 to 5, the pressurizing means comprising: an elastomeric container disposed in the vessel and having compressible fluid housed therein at a selected pressure which increases when the container is compressed.
9. A fuel system according to claim 1, wherein the actuating fluid comprises engine oil.
10. A hydraulically-actuated fuel system for a diesel engine having plurality of fuel injectors each of which is actuatable by an actuating fluid when the engine is running, the system comprising a high pressure pump operable when the engine is running for pressurizing actuating fluid; a manifold in fluid communication with the pump and the fuel injectors for transmitting pressurized actuating fluid from the pump to the fuel injectors; and an accumulator reservoir in fluid communication with the manifold and pump for supplying pressurized actuating fluid to the manifold when the pump is not operating and for supplying pressurized actuating fluid to the pump during pump operation independent of the relative heights of the high pressure pump, the manifold and the accumulator reservoir.
11. A hydraulically-actuated fuel system according to claim 10, further comprising a pressure control valve for regulating fluid communication between the manifold and the accumulator reservoir.
12. The fuel system according to claim 10 or claim 11, wherein the accumulator reservoir is in fluid communication with and chargable by a transfer pump.
13. A fuel system according to any one of claims 10 to 12, wherein the actuating fluid comprises engine oil.
14. A hydraulically-actuated fuel system for a diesel engine having a plurality of fuel injectors each of which is actuatable by high pressure engine oil when the engine is operating, the system comprising a high pressure pump operable when the engine is running for pressurizing engine oil; an accumulator reservoir; a manifold in fluid communication with the pump for receiving high pressure engine oil therefrom during the pump's operation and in fluid communication with the accumulator reservoir for receiving engine oil therefrom when the pump is not operating independent of the relative heights of the high pressure pump, manifold and accumulator reservoir; a rail pressure control valve for regulating the pressure of the pressurized engine oil; and a makeup check valve for obstructing engine oil flow from the manifold to the accumulator reservoir.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US57001895A | 1995-12-11 | 1995-12-11 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9621406D0 GB9621406D0 (en) | 1996-12-04 |
| GB2308157A true GB2308157A (en) | 1997-06-18 |
| GB2308157B GB2308157B (en) | 1999-06-02 |
Family
ID=24277852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9621406A Expired - Lifetime GB2308157B (en) | 1995-12-11 | 1996-10-14 | Fuel system having actuating fluid accumulator reservoir |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH09177634A (en) |
| GB (1) | GB2308157B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2351772A (en) * | 1999-07-08 | 2001-01-10 | Caterpillar Inc | Pressure-intensifying hydraulically-actuated electronically-controlled fuel injection system with individual mechanical unit pumps |
| DE10260775A1 (en) * | 2002-12-23 | 2004-07-01 | Daimlerchrysler Ag | Fuel supply system for internal combustion engines with direct injection |
| WO2017021583A1 (en) * | 2015-08-06 | 2017-02-09 | Wärtsilä Finland Oy | Fuel injection system and method for operating a piston engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101863170B1 (en) * | 2016-04-29 | 2018-06-01 | 한국에너지기술연구원 | DME Fuel Feed Device for Diesel Engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4325340A (en) * | 1980-07-21 | 1982-04-20 | The United States Of America As Represented By The Secretary Of The Army | Variable pressure fuel injection system |
| US5213083A (en) * | 1991-10-11 | 1993-05-25 | Caterpillar Inc. | Actuating fluid pump having priming reservoir |
| US5245970A (en) * | 1992-09-04 | 1993-09-21 | Navistar International Transportation Corp. | Priming reservoir and volume compensation device for hydraulic unit injector fuel system |
-
1996
- 1996-10-14 GB GB9621406A patent/GB2308157B/en not_active Expired - Lifetime
- 1996-12-05 JP JP32515596A patent/JPH09177634A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4325340A (en) * | 1980-07-21 | 1982-04-20 | The United States Of America As Represented By The Secretary Of The Army | Variable pressure fuel injection system |
| US5213083A (en) * | 1991-10-11 | 1993-05-25 | Caterpillar Inc. | Actuating fluid pump having priming reservoir |
| US5245970A (en) * | 1992-09-04 | 1993-09-21 | Navistar International Transportation Corp. | Priming reservoir and volume compensation device for hydraulic unit injector fuel system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2351772A (en) * | 1999-07-08 | 2001-01-10 | Caterpillar Inc | Pressure-intensifying hydraulically-actuated electronically-controlled fuel injection system with individual mechanical unit pumps |
| US6390070B2 (en) * | 1999-07-08 | 2002-05-21 | Caterpillar Inc. | Pressure-intensifying hydraulically-actuated electronically-controlled fuel injection system with individual mechanical unit pumps |
| GB2351772B (en) * | 1999-07-08 | 2003-07-23 | Caterpillar Inc | Pressure-intensifying hydraulically-actuated electronically-controlled fuel injection system with individual mechanical unit pumps |
| DE10260775A1 (en) * | 2002-12-23 | 2004-07-01 | Daimlerchrysler Ag | Fuel supply system for internal combustion engines with direct injection |
| US7201128B2 (en) | 2002-12-23 | 2007-04-10 | Daimlerchrysler Ag | Fuel supply system for internal combustion engine with direct fuel injection |
| WO2017021583A1 (en) * | 2015-08-06 | 2017-02-09 | Wärtsilä Finland Oy | Fuel injection system and method for operating a piston engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09177634A (en) | 1997-07-11 |
| GB2308157B (en) | 1999-06-02 |
| GB9621406D0 (en) | 1996-12-04 |
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