WO1982001140A1 - Filtering and dampening apparatus - Google Patents
Filtering and dampening apparatus Download PDFInfo
- Publication number
- WO1982001140A1 WO1982001140A1 PCT/US1980/001321 US8001321W WO8201140A1 WO 1982001140 A1 WO1982001140 A1 WO 1982001140A1 US 8001321 W US8001321 W US 8001321W WO 8201140 A1 WO8201140 A1 WO 8201140A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- filtering
- pressure
- filtering element
- chamber
- Prior art date
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 49
- 239000012530 fluid Substances 0.000 claims abstract description 78
- 230000037361 pathway Effects 0.000 claims description 18
- 230000000977 initiatory effect Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims 2
- 239000000446 fuel Substances 0.000 abstract description 57
- 238000002347 injection Methods 0.000 abstract description 29
- 239000007924 injection Substances 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 description 14
- 239000002245 particle Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/153—Anti-leakage or anti-return valves
-
- 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
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
Definitions
- the present invention relates to fluid pres- sure systems, such as engine fuel injection systems, and, more particularly, to filtering and pressure dampening apparatus in such systems.
- cavitation can be a serious problem in that the fluid pressure can frequently drop below the vapor pressure of the fluid owing to large pressure fluctuations in such systems.
- diesel engines employ fuel injection jjy/stems which have a high pressure fuel injection pump for each combustion cylinder of the engine to provide pressurized fuel at specific intervals to an associated nozzle for injection into the related combustion cylinder.
- Such systems must have a rather sharp fuel cutoff at the nozzle in order to avoid continued dribbling of fuel -into a combustion cylinder which can cause poor combustion and waste of fuel. This is particularly critical to meet emissions standards for engines.
- the present invention is directed to over ⁇ coming one or more of the problems set forth above.
- apparatus for filtering fluid and dampening the pressure of said fluid includes a housing and a filtering element.
- the housing has a chamber in which a filtering element is positioned.
- the filtering element is movable in the chamber between first and second positions in response to a pressure wave of fluid .directed onto and through the filtering element.
- the filtering and dampening apparatus is used for example, in fuel injection systems for engines.
- the apparatus filters fluid pressurized by a pump and directed through a nozzle for injection into a combustion cylinder of the engine.
- the filter is also movable to absorb or dampen pressure waves created in the system owing to sudden cutoff of the pressurized fuel being injected. This reduces large fluctuations in fuel pressure to substantially eliminate cavitation and secondary injection into the combustion cylinder.
- the drawing is a diagrammatic cross-sectional view in partial elevation of one embodiment of the present invention associated with a pump and nozzle of a fuel injection system for an engine.
- apparatus 10 for filtering fluid and dampening pressure of fluid is shown associated with, for example, a fuel injection nozzle 12 for a combustion cylinder of a diesel engine (not shown) .
- the nozzle is operable to inject fluid or fuel into the combustion cylinder when supplied from a pressurized fluid source 14, such as a fuel injection pump.
- the pump has a plunger 16 which is movable upwardly in a bore 18 opening on a chamber 20.
- Valve means 22 is provided to initiate or control flow of fuel into a fluid pathway 23 to the nozzle at a fluid pressure of a desired magni ⁇ tude, such as by a first spring biased check valve 24, and to block flow of fluid from the fluid pathway, such as by a second spring biased check valve 25.
- the fluid pathway includes a passageway 26 at the pump, and first and second fluid or fuel lines 28,29.
- the first fuel line 28 extends between a fuel line coupler 30,32 of the pump and of the filtering and dampening apparatus.
- the second fuel line 29 extends from said apparatus to the nozzle. It should be understood that the filtering and dampening apparatus can also be positioned at other locations in the fuel system.
- said apparatus has a housing 34 and a filtering element 36.
- the filtering element is preferably a woven, knitted or compressed wire filter, or a sintered screen filter as shown by reference numeral 38, with a preselected porosity for filtering fluid to the degree desired as it passes through the filter.
- the porosity is preferably such that the filter traps particles which might otherwise plug the jet orifices of the fuel injection nozzle 12 through which fuel enters a combustion cylinder.
- the housing has a chamber 40 in which the filter is movably positioned and a retainer 42 which is removably positioned in an opening 44 of the housing.
- the retainer is maintained in position by the second fuel line 29 which abuts said retainer and urges it against the housing when a fuel line connector element 46 is threadably tightened on the housing.
- the chamber is thus defined by a cylindrical bore 48 in the retainer with a cylindrical bore 50 in said housing. Said chamber is a portion of the fluid pathway in that it is positioned in fluid communication with the first and second fuel lines 28,29 through passageways 52,54 in the housing.
- the filter 38 is movable in the chamber ' 40 between first and second positions in response to a pressure wave of the fuel in the fluid pathway 23 which is directed onto and through the filter.
- the first position (shown) is represented by the furthermost travel of the filter in the retainer bore 48 at which it abuts the retainer 42.
- the second position is repre ⁇ sented by the furthermost travel of the filter in the housing bore 50.
- a spring 56 is shown which continu ⁇ ously biases the filter from its second toward its first position.
- the spring can also be omitted by properly sizing the filter with respect to the diameters of the bores 48,50 in order to obtain resistance to travel of the spring in- the chamber bores 48,50 through friction between the walls of the chamber bores and the filter.
- the diametrical clearance in such embodiments is preferably such that particles which might otherwise plug the jet orifices of the nozzle 12 are blocked from passing between the walls of the chamber 40 and the filter.
- the filter 38 is movable from the first toward the second position in response to the pressure wave of the fuel being oriented in a first direction D, in the fluid pathway.
- Such pressure wave orientation is opposite the orientation of the pressure wave caused by fuel compressed by the pump 14 which travels in a second direction D_ through the fluid pathway 23.
- the filter is movable from its second toward its first position by the return action of the spring 56 or, where the spring is absent, by the pressure wave being oriented in said second direction and having a fluid pressure at about a first preselected magnitude.
- the first preselected magnitude herein represents the injection pressure of fuel at which the nozzle 12 is operable to introduce fuel into the com ⁇ bustion cylinder of the engine.
- the plunger 16 moves upwardly in the bore 18 on the injection cycle of the associated engine to compress pressurized fuel trapped in the chamber 20.
- the fuel is forced upwardly by the plunger against a face 58 of the check valve 24 and forces the valve to its open position at which fuel flow at the fluid injection pressure of about the first preselected magnitude is initiated in the fuel lines 28,29 to the nozzle 12.
- the check valve 25 in the nozzle 12 will open and fuel is injected into the related one of the engine combustion cylinders (not shown) .
- the pump 14 When the plunger 16 reaches the end of its stroke, the pump 14 is blocked from initiating fuel flow and fuel pumping ends.
- the check valve 24 at the pump 14 moves to its closed position owing to the spring bias and to higher fuel pressure on the top of the valve.
- the force made by the pressure of the fuel then becomes less and the check valve 25 in the nozzle 12 abruptly closes and stops injection into the combustion cylinder.
- a pressure is developed in response to closure of the nozzle check valve 25 and the abrupt termination of the injection cycle.
- Such pressure is a shock or pressure wave resulting from the check valve closing in the nozzle 12, where said check valve has blocked further injection.
- the pressure wave travels back toward the pump 14 and subsequently reflects or bounces off of the closed pump check valve 24 which tends to reverse direction of said wave.
- the pressure wave then travels in the fuel lines 28,29 until said wave reaches the closed valve 25 where it is again reflected.
- Such pressure phenomenon is generally referred to as secondary pressure waves and.can result in undesirable cavitation owing to a combination of* reversals of the secondary pressure waves at certain points in the fuel lines 28,29 which generates a vacuum condition.
- the reflected magnitude of a pressure wave is greater than the preselected opening pressure of the check valve 25, an undesirable fuel injection into a combustion cylinder will occur.
- the filter 38 being positioned in the fluid flow path, acts to dampen or flatten out the
- I. V.' ⁇ >r_ secondary pressure waves to substantially reduce their magnitude and such detrimental effects as may occur in the fuel system.
- the filter 38 when the pump 14 initiates the injection flow, the filter 38 is at its first position (shown) owing to the action of the spring.
- the filter In embodiments where the spring is absent, the filter is movable to the first position in response to the fluid flow at the injection pressure. Such movement will generally be substantially unresisted by the frictional forces between the filter and bores 48,50 owing to the high injection pressures relative to the secondary pressures. Thus, dampening or reducing injection pressure in moving the filter to its first position should be minimal.
- the filter 38 is movable from its first position abutting the retainer 42 toward its second position in response to the secondary pressure waves, in effect, striking the filter.
- the filter in being moved by the pressure waves as they travel back toward the pump 14 in the first direction D, , tends to dampen their effect in the fuel lines 28,29 by absorbing energy and thus substantially eliminates cavitation and unwanted secondary fuel injections into the combustion cylinder of the engine.
- the filter porosity can be sized to minimize the restriction ' to fuel flow while maintaining filtering operation. The combined filter and pressure pulse dampener therefore obviates the need for an additional filter in the system, such as an edge filter which is commonly used in such fuel systems.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
High pressure fluid systems, such as fuel injection systems for an engine or hydraulic controls, often experience high pressure fluctuations which can cause cavitation in the system components plus secondary fuel injection in the fuel systems. Apparatus (10) is provided for dampening the pressures in such systems, as well as filtering the fluid. The apparatus (10) has a filtering element (36) which does not substantially restrict fluid flow but is movable in response to pressure waves in the fluid which are directed onto the filtering element (36). The filtering element (36) thereby filters the fluid and tends to dampen the effects of the pressure waves, which create the pressure fluctuations, by resisting their movement through the fluid system.
Description
Description
Filtering and Dampening Apparatus
Technical Field
The present invention relates to fluid pres- sure systems, such as engine fuel injection systems, and, more particularly, to filtering and pressure dampening apparatus in such systems.
Background Art
In high pressure fluid systems, cavitation can be a serious problem in that the fluid pressure can frequently drop below the vapor pressure of the fluid owing to large pressure fluctuations in such systems.
For example, diesel engines employ fuel injection jjy/stems which have a high pressure fuel injection pump for each combustion cylinder of the engine to provide pressurized fuel at specific intervals to an associated nozzle for injection into the related combustion cylinder. Such systems must have a rather sharp fuel cutoff at the nozzle in order to avoid continued dribbling of fuel -into a combustion cylinder which can cause poor combustion and waste of fuel. This is particularly critical to meet emissions standards for engines.
When high injection pressures and high engine speeds are used, a sharp cutoff can cause large pressure fluctuations in the fuel line between the fuel pump and nozzle. The fluctuations result largely from secondary pressure waves which develop in the lines as the nozzle cuts off fuel flow into the cylinder. The high pressures at the nozzle, when it abruptly cuts off the flow, create shock or pressure waves which travel back toward the pump to introduce the fluctuations leading to
cavitation or, under some circumstances, secondary fuel injection into a combustion cylinder.
It is desirable, therefore, to dampen such secondary pressures to decrease their effect in the system. One solution has been to use a labyrinth of restricted passages to dampen pressure while permitting fluid flow. The restrictions can, however, be too great for high speed engine operation. Another solution, shown in U.S. Patent 3,986,795, which issued to Kranc et al on October 19, 1976, is to provide a reverse check valve at the injection pump to control the secondary pressures.
The present invention is directed to over¬ coming one or more of the problems set forth above.
Disclosure of Invention
In one aspect of the present invention, apparatus for filtering fluid and dampening the pressure of said fluid includes a housing and a filtering element. The housing has a chamber in which a filtering element is positioned. The filtering element is movable in the chamber between first and second positions in response to a pressure wave of fluid .directed onto and through the filtering element.
The filtering and dampening apparatus is used for example, in fuel injection systems for engines. The apparatus filters fluid pressurized by a pump and directed through a nozzle for injection into a combustion cylinder of the engine. The filter is also movable to absorb or dampen pressure waves created in the system owing to sudden cutoff of the pressurized fuel being injected. This reduces large fluctuations in fuel pressure to substantially eliminate cavitation and secondary injection into the combustion cylinder.
Brief Description of the Drawings
The drawing is a diagrammatic cross-sectional view in partial elevation of one embodiment of the present invention associated with a pump and nozzle of a fuel injection system for an engine.
Best Mode For Carrying Out the Invention
Referring to the drawing, apparatus 10 for filtering fluid and dampening pressure of fluid is shown associated with, for example, a fuel injection nozzle 12 for a combustion cylinder of a diesel engine (not shown) . As is known in the fuel systems art, the nozzle is operable to inject fluid or fuel into the combustion cylinder when supplied from a pressurized fluid source 14, such as a fuel injection pump. The pump has a plunger 16 which is movable upwardly in a bore 18 opening on a chamber 20. Valve means 22 is provided to initiate or control flow of fuel into a fluid pathway 23 to the nozzle at a fluid pressure of a desired magni¬ tude, such as by a first spring biased check valve 24, and to block flow of fluid from the fluid pathway, such as by a second spring biased check valve 25. The fluid pathway includes a passageway 26 at the pump, and first and second fluid or fuel lines 28,29. The first fuel line 28 extends between a fuel line coupler 30,32 of the pump and of the filtering and dampening apparatus. The second fuel line 29 extends from said apparatus to the nozzle. It should be understood that the filtering and dampening apparatus can also be positioned at other locations in the fuel system. Referring to the filtering and dampening apparatus 10 in detail, said apparatus has a housing 34 and a filtering element 36. The filtering element is preferably a woven, knitted or compressed wire filter, or a sintered screen filter as shown by reference
numeral 38, with a preselected porosity for filtering fluid to the degree desired as it passes through the filter. The porosity is preferably such that the filter traps particles which might otherwise plug the jet orifices of the fuel injection nozzle 12 through which fuel enters a combustion cylinder. The housing has a chamber 40 in which the filter is movably positioned and a retainer 42 which is removably positioned in an opening 44 of the housing. The retainer is maintained in position by the second fuel line 29 which abuts said retainer and urges it against the housing when a fuel line connector element 46 is threadably tightened on the housing. In the embodiment shown, the chamber is thus defined by a cylindrical bore 48 in the retainer with a cylindrical bore 50 in said housing. Said chamber is a portion of the fluid pathway in that it is positioned in fluid communication with the first and second fuel lines 28,29 through passageways 52,54 in the housing.
The filter 38 is movable in the chamber '40 between first and second positions in response to a pressure wave of the fuel in the fluid pathway 23 which is directed onto and through the filter. The first position (shown) is represented by the furthermost travel of the filter in the retainer bore 48 at which it abuts the retainer 42. The second position is repre¬ sented by the furthermost travel of the filter in the housing bore 50. A spring 56 is shown which continu¬ ously biases the filter from its second toward its first position. Although not shown, it may be necessary to use a retaining element between the spring and the filter to properly align the filter and spring and to protect the filter. The spring can also be omitted by properly sizing the filter with respect to the diameters of the bores 48,50 in order to obtain resistance to travel of the spring in- the chamber bores 48,50 through
friction between the walls of the chamber bores and the filter. The diametrical clearance in such embodiments is preferably such that particles which might otherwise plug the jet orifices of the nozzle 12 are blocked from passing between the walls of the chamber 40 and the filter.
As is evident from the drawing, the filter 38 is movable from the first toward the second position in response to the pressure wave of the fuel being oriented in a first direction D, in the fluid pathway. Such pressure wave orientation is opposite the orientation of the pressure wave caused by fuel compressed by the pump 14 which travels in a second direction D_ through the fluid pathway 23. The filter is movable from its second toward its first position by the return action of the spring 56 or, where the spring is absent, by the pressure wave being oriented in said second direction and having a fluid pressure at about a first preselected magnitude. The first preselected magnitude herein represents the injection pressure of fuel at which the nozzle 12 is operable to introduce fuel into the com¬ bustion cylinder of the engine.
It should be understood that the filter 38 and housing 34, as well as the other fluid system components with which they are used, can be of other configurations as is known in the art without departing from the invention.
Industrial Applicability
In the operation of the fuel injection system, the plunger 16 moves upwardly in the bore 18 on the injection cycle of the associated engine to compress pressurized fuel trapped in the chamber 20. The fuel is forced upwardly by the plunger against a face 58 of the check valve 24 and forces the valve to its open position
at which fuel flow at the fluid injection pressure of about the first preselected magnitude is initiated in the fuel lines 28,29 to the nozzle 12. At such pres¬ sure, the check valve 25 in the nozzle 12 will open and fuel is injected into the related one of the engine combustion cylinders (not shown) .
When the plunger 16 reaches the end of its stroke, the pump 14 is blocked from initiating fuel flow and fuel pumping ends. The check valve 24 at the pump 14 moves to its closed position owing to the spring bias and to higher fuel pressure on the top of the valve. The force made by the pressure of the fuel then becomes less and the check valve 25 in the nozzle 12 abruptly closes and stops injection into the combustion cylinder. A pressure is developed in response to closure of the nozzle check valve 25 and the abrupt termination of the injection cycle. Such pressure is a shock or pressure wave resulting from the check valve closing in the nozzle 12, where said check valve has blocked further injection. The pressure wave travels back toward the pump 14 and subsequently reflects or bounces off of the closed pump check valve 24 which tends to reverse direction of said wave. The pressure wave then travels in the fuel lines 28,29 until said wave reaches the closed valve 25 where it is again reflected. Such pressure phenomenon is generally referred to as secondary pressure waves and.can result in undesirable cavitation owing to a combination of* reversals of the secondary pressure waves at certain points in the fuel lines 28,29 which generates a vacuum condition. Further, when the reflected magnitude of a pressure wave is greater than the preselected opening pressure of the check valve 25, an undesirable fuel injection into a combustion cylinder will occur. The filter 38, being positioned in the fluid flow path, acts to dampen or flatten out the
BCREAC
_C___
I. V.' ~>r_
secondary pressure waves to substantially reduce their magnitude and such detrimental effects as may occur in the fuel system.
For example, in embodiments utilizing the spring 56, when the pump 14 initiates the injection flow, the filter 38 is at its first position (shown) owing to the action of the spring. In embodiments where the spring is absent, the filter is movable to the first position in response to the fluid flow at the injection pressure. Such movement will generally be substantially unresisted by the frictional forces between the filter and bores 48,50 owing to the high injection pressures relative to the secondary pressures. Thus, dampening or reducing injection pressure in moving the filter to its first position should be minimal.
As the secondary pressure waves are created, therefore, the filter 38 is movable from its first position abutting the retainer 42 toward its second position in response to the secondary pressure waves, in effect, striking the filter. The filter, in being moved by the pressure waves as they travel back toward the pump 14 in the first direction D, , tends to dampen their effect in the fuel lines 28,29 by absorbing energy and thus substantially eliminates cavitation and unwanted secondary fuel injections into the combustion cylinder of the engine. Also, for high fuel flow operational requirements of the engine, the filter porosity can be sized to minimize the restriction' to fuel flow while maintaining filtering operation. The combined filter and pressure pulse dampener therefore obviates the need for an additional filter in the system, such as an edge filter which is commonly used in such fuel systems.
Other aspects, objects and advantages will become apparent from a study of the specification, drawings and appended claims.
Claims
1. Apparatus (10) for filtering fluid and dampening pressure of said fluid, comprising: a fluid pathway (23) ; a housing (34) having a chamber (40) defining a portion of said fluid pathway (23) ; and a filtering element (36) having a preselected porosity for filtering fluid passing through said filtering element (36) and being positioned in said chamber (40) and controllably movable between first and second positions in said chamber (40) in response to a pressure wave of fluid in said fluid pathway (24) directed onto and through said filtering element (36) .
2. The filtering and dampening apparatus (10) , as set forth in claim 1, wherein said filtering element (36) is movable from said first position toward said second position in response to said pressure wave being oriented in a first direction (D, ) in said fluid pathway (23) and from said second toward said first position in response to a pressure wave having a fluid pressure at about a first preselected magnitude and being oriented in a second direction (D») in said fluid pathway (23) , said second direction (D_) being opposite said first direction (D-) .
3. The filtering and dampening apparatus (10) , as set forth in claim 1, wherein said housing (34) has a retainer (42) and defines an opening (44) , said retainer (42) being removably positioned in said opening
(44) and defining said chamber (40) with said housing
(34).
4. The filtering and dampening apparatus (10) , as set forth in claim 1, including valve means
(22) for initiating fluid flow into said fluid pathway
(23) at a fluid pressure of about a first preselected magnitude and for blocking fluid flow from said fluid pathway (23) .
5. The filtering and dampening apparatus (10), as set forth in claim 4, wherein a pressure wave is initiated in said fluid pathway (23) in response to said valve means (22) blocking fluid flow from said fluid pathway (24) and said filtering element (36) moves from said first toward said second position of said filtering element (36) in response to said pressure wave.
6. The filtering and dampening apparatus
(10) , as set forth in claim 1, including a pressurized fluid source (14) and a fluid nozzle (12) and wherein said fluid pathway (23) includes a fluid line (28) connected between said fluid source (14) and said fluid nozzle (12) .
7. The filtering and dampening apparatus (10) , as set forth in claim 1, wherein said filtering element (36) is continuously biased toward said first position of said filtering element (36) .
8. The filtering and dampening apparatus
(10) , as set forth in claim 1, wherein said filtering element (36) is a woven wire filter (38) .
9. The filtering and dampening apparatus (10) , as set forth in claim 1, wherein said filtering element (36) is a sintered screen filter (38).
10. The filtering and dampening apparatus (10) , as set forth in claim 1, wherein said filtering element (36) is a compressed wire filter (38) .
11. Apparatus (10) for filtering pressurized fluid and dampening pressure waves in said fluid, comprising: a fluid line (28) ; a housing (34) having a chamber (40) , said chamber (40) being positioned in fluid communication with said fluid line (28) ; a pressurized fluid source (14) positioned in fluid communication with said fluid line (28) and controllably initiating fluid flow at a pressure of about a first preselected magnitude in said chamber (40) and said fluid line (28) ; a nozzle (12) having a check valve (25) movable between a closed position at which fluid is blocked from passing through said nozzle (12) and an open position at which fluid passes through said nozzle (12) ; and a filtering element (36) having a preselected porosity for filtering said fluid and being positioned in said chamber (40)' and movable between first and second positions in said chamber (40) , said filtering element (36) being movable from said first toward said second position in response to said pressurized fluid source (14) being blocked from initiating said fluid flow in said fluid pathway (24) and said check valve (25) moving to said closed position of said check valve (25).
BU £_
_0Λ PI
' - V..P0
'
12. The filtering and dampening apparatus (10) , as set forth in claim 11, wherein said filtering element (36) is movable from said second toward said first position in response to said pressurized fluid source (14) initiating fluid flow at said pressure of about said first preselected magnitude.
_ _ PI_ VV:P0
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1980/001321 WO1982001140A1 (en) | 1980-10-06 | 1980-10-06 | Filtering and dampening apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1980/001321 WO1982001140A1 (en) | 1980-10-06 | 1980-10-06 | Filtering and dampening apparatus |
WOUS80/01321801006 | 1980-10-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1982001140A1 true WO1982001140A1 (en) | 1982-04-15 |
Family
ID=22154581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1980/001321 WO1982001140A1 (en) | 1980-10-06 | 1980-10-06 | Filtering and dampening apparatus |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO1982001140A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4556490A (en) * | 1983-03-19 | 1985-12-03 | Robert Bosch Gmbh | Arrangement for feeding of fuel |
DE29811141U1 (en) * | 1998-06-24 | 1999-09-30 | Weh Erwin | Fluid line |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1102685A (en) * | 1913-06-12 | 1914-07-07 | Joseph H Proper | Filter. |
US2339457A (en) * | 1941-04-16 | 1944-01-18 | Julian A Campbell | Pulsation dampener |
US2633146A (en) * | 1947-03-21 | 1953-03-31 | Joseph B Witt | Fuel pulsation dampener and pressure regulator |
US2699259A (en) * | 1952-05-15 | 1955-01-11 | Bell & Gossett Co | Filter movable to by-pass position |
US2876793A (en) * | 1955-08-16 | 1959-03-10 | Albert G H Vanderpoel | Pressure regulator-filter device |
US3240346A (en) * | 1961-11-06 | 1966-03-15 | Nuclear Products Company | In-line removable filter |
US3248183A (en) * | 1964-04-17 | 1966-04-26 | Robert A Powell | High pressure high temperature filter |
US3986795A (en) * | 1973-08-22 | 1976-10-19 | Caterpillar Tractor Co. | Fuel injection assembly |
US3993561A (en) * | 1975-06-16 | 1976-11-23 | Swearingen Edward J | Fuel filter |
US4018686A (en) * | 1975-07-10 | 1977-04-19 | Nupro Company | Fluid strainer element |
-
1980
- 1980-10-06 WO PCT/US1980/001321 patent/WO1982001140A1/en unknown
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1102685A (en) * | 1913-06-12 | 1914-07-07 | Joseph H Proper | Filter. |
US2339457A (en) * | 1941-04-16 | 1944-01-18 | Julian A Campbell | Pulsation dampener |
US2633146A (en) * | 1947-03-21 | 1953-03-31 | Joseph B Witt | Fuel pulsation dampener and pressure regulator |
US2699259A (en) * | 1952-05-15 | 1955-01-11 | Bell & Gossett Co | Filter movable to by-pass position |
US2876793A (en) * | 1955-08-16 | 1959-03-10 | Albert G H Vanderpoel | Pressure regulator-filter device |
US3240346A (en) * | 1961-11-06 | 1966-03-15 | Nuclear Products Company | In-line removable filter |
US3248183A (en) * | 1964-04-17 | 1966-04-26 | Robert A Powell | High pressure high temperature filter |
US3986795A (en) * | 1973-08-22 | 1976-10-19 | Caterpillar Tractor Co. | Fuel injection assembly |
US3993561A (en) * | 1975-06-16 | 1976-11-23 | Swearingen Edward J | Fuel filter |
US4018686A (en) * | 1975-07-10 | 1977-04-19 | Nupro Company | Fluid strainer element |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4556490A (en) * | 1983-03-19 | 1985-12-03 | Robert Bosch Gmbh | Arrangement for feeding of fuel |
DE29811141U1 (en) * | 1998-06-24 | 1999-09-30 | Weh Erwin | Fluid line |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU2102625C1 (en) | Injecting device | |
US4170974A (en) | High pressure fuel injection system | |
US4161161A (en) | Device for damping pressure waves in an internal combustion engine fuel injection system | |
US4356091A (en) | Filtering and dampening apparatus | |
KR20130098397A (en) | Device for injecting fuel into the combustion chamber of an internal combustion engine | |
US4036192A (en) | Engine fuel injection system | |
KR100340741B1 (en) | Fuel injection device of internal combustion engine | |
GB2289503A (en) | I.c.engine fuel pumping injection nozzle | |
EP1387937A1 (en) | Fuel injection valve for internal combustion engines with damping chamber reducing pressure oscillations | |
EP1007839B1 (en) | Hydraulically actuated electronic fuel injection system | |
EP1552137A1 (en) | Device for surpressing pressure waves on storage injection systems | |
US4201160A (en) | Fuel injection systems | |
US4840310A (en) | Fuel injection nozzle | |
GB2265948A (en) | Fuel-injection device ,such as a pump nozzle for internal combustion engines. | |
WO1982001140A1 (en) | Filtering and dampening apparatus | |
DE19544241A1 (en) | Quiet=running HP fuel injection system | |
WO2000017506A9 (en) | Servo-controlled fuel injector with leakage limiting device | |
US6938610B2 (en) | Fuel injection device with a pressure booster | |
US6845757B2 (en) | Fuel injection system for an internal combustion engine | |
EP1688613A3 (en) | Fuel injection system | |
US5934570A (en) | Injector | |
DK176162B1 (en) | Fuel pump for internal combustion engines, especially large slow-moving marine diesel engines | |
US3011489A (en) | Reciprocating action pumps for the injection of fuel into internal combustion engines | |
US4709680A (en) | Device for controlling fuel injection apparatus in diesel engines | |
US2880675A (en) | Reciprocating pumps in particular in fuel injection pumps |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Designated state(s): US |