GB2614339A - High-Pressure Fuel Pump - Google Patents
High-Pressure Fuel Pump Download PDFInfo
- Publication number
- GB2614339A GB2614339A GB2201468.2A GB202201468A GB2614339A GB 2614339 A GB2614339 A GB 2614339A GB 202201468 A GB202201468 A GB 202201468A GB 2614339 A GB2614339 A GB 2614339A
- Authority
- GB
- United Kingdom
- Prior art keywords
- accumulator
- auxiliary chamber
- plane
- chamber
- support
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 47
- 230000001154 acute effect Effects 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 description 11
- 230000010349 pulsation Effects 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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
- F02M55/04—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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0041—Means for damping pressure pulsations
-
- 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
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A high-pressure fuel pump 1 having an accumulator 20 located in an auxiliary chamber (damper cup) 5, where an outermost periphery of the accumulator is elliptical and the accumulator is orientated at an acute angle Ø with respect to a sidewall 13 of the auxiliary chamber, and where there is an accumulator support 30 comprising accumulator contacting portions 32 and chamber contacting portions 31 support the accumulator within the damper cup. Preferably the main plane of the accumulator is located such that it is substantially coplanar with a plane of maximum intersecting area of the auxiliary chamber, wherein the plane of maximum intersecting area of the auxiliary chamber is a plane which intersects the internal volume of the auxiliary chamber such that the area bounded by the intersection between the plane and the internal volume of the auxiliary chamber is at a maximum.
Description
High-pressure fuel pump
Field of the invention
The present disclosure relates to a high-pressure fuel pump, in particular a high-pressure fuel pump comprising an accumulator for damping fuel pressure waves.
Background to the invention
In gasoline direct fuel injection systems, fuel from a fuel tank pump is supplied to a high-pressure pump and then from the high-pressure pump to a fuel rail which supplies high-pressure fuel to the injectors of an internal combustion engine.
During operation, a spill valve of the high-pressure pump can be commanded to remain open for a portion of the compression stroke of the plunger, thereby adjusting the fuel pressure generated by the high-pressure pump in order to accommodate different operating conditions of the internal combustion engine. However, when the spill valve remains open during a portion of the compression stroke of the plunger, pressure pulsations are generated which can propagate upstream of the spill valve and interact with the system components and so generate undesirable noise and vibration. Such pressure pulsations must consequently be attenuated.
The pressure pulsations are typically attenuated by one or more pulsation dampers disposed within a fuel-filled cup (hereafter referred to as damper cup) mounted on the high-pressure pump, where fuel in the damper cup is exposed to the pressure pulsations in use. The pulsation dampers typically comprise a pre-charged gas-filled accumulator.
Such accumulators are generally formed of two dish-like components that are welded together to form an enclosed volume. Accumulators typically have a thin enclosure wall and the enclosed volume is generally pre-charged with an inert gas so that the accumulator is compliant and responds under pulsating external pressure loads from fuel in the fuel-filled cup.
When exposed to external pulsating fluid forces, the accumulator undergoes a volume change which serves to cancel out pressure pulsations in the fuel. The enclosed volume of the accumulator contracts during a rise in pressure and expands during a fall in pressure. In this way the accumulator acts to help maintain the fuel pressure in the fuel-filled cup at an average value.
The effectiveness of the accumulator in damping the pulsations and maintaining the fuel pressure at a desired average value with a desired frequency range depends on how optimally the volume compensation and the dynamic response characteristics of the accumulator can be tuned. It is preferable for the accumulator to have a large enclosed cavity volume and sufficient compliance to undergo the desired volume changes in response to the intensity of pressure pulsations. However, in practice there are constraints on accumulator design and configuration schemes due to restrictions in available packaging space in the engine compartment of a vehicle On which the high-pressure pump is installed). It is therefore preferable to limit the size of the damper cup within which the accumulator resides. In addition, to minimise overall costs of the damper system, it is preferable to use only a single accumulator rather than an array of accumulators.
The present invention has been devised to address or overcome at least some of the aforementioned problems associated with the prior art.
Statements of the invention
The present invention provides a high-pressure fuel pump comprising: a fuel inlet; a fuel outlet; a pressure chamber located between the fuel inlet and the fuel outlet; an auxiliary chamber located upstream of the pressure chamber with respect to a fuel flow direction in use from the fuel inlet to the fuel outlet, wherein the auxiliary chamber comprises an internal volume bounded by a sidewall, a roof and a base; an accumulator located in the auxiliary chamber, wherein an outermost periphery of the accumulator substantially describes an ellipse which defines a main plane of the accumulator, and wherein the main plane of the accumulator is orientated at an acute angle with respect to the sidewall of the auxiliary chamber; and at least one accumulator support comprising one or more accumulator contact portions in contact with the accumulator, and one or more chamber contact portions in contact with the sidewall, the roof, or the base of the auxiliary chamber.
The present invention is advantageous as the angled orientation of the accumulator in the auxiliary chamber allows the accumulator to have a greater surface area and internal volume than is possible for prior art accumulators so that pressure pulsations may be more effectively damped and the fuel pressure may be more effectively maintained at a desired average value with a desired frequency range.
In order to maximise the surface area and volume of the accumulator, preferably the main plane of the accumulator is located such that it is substantially coplanar with a plane of maximum intersecting area of the auxiliary chamber, wherein the plane of maximum intersecting area of the auxiliary chamber is a plane which intersects the internal volume of the auxiliary chamber such that the area bounded by the intersection between the plane and the internal volume of the auxiliary chamber is at a maximum.
If practical and/or design limitations mean that the main plane of the accumulator cannot substantially match the plane of maximum intersecting area of the auxiliary chamber, then preferably the main plane of the accumulator is orientated such that the angle of separation between the main plane of the accumulator and the plane of maximum intersecting area of the auxiliary chamber is less than or equal to about 200. More preferably the angle of separation between the main plane of the accumulator and a plane of maximum intersecting area of the auxiliary chamber is less than or equal to about 100. More preferably still, the angle of separation between the main plane of the accumulator and a plane of maximum intersecting area of the auxiliary chamber is less than or equal to about 5°.
Optionally a first accumulator support is located between the accumulator and the roof of the auxiliary chamber, and a second accumulator support is located between the accumulator and the base of the auxiliary chamber to provide stable even support on either side of the accumulator.
The accumulator supports may optionally be connected together to limit or prevent relative movement between the supports during installation and use.
One or more of the chamber contact portions of the first support may be connected to one or more of the chamber contact portions of the second support by at least one connector piece.
Alternatively, one or more of the accumulator contact portions of the first support are connected to one or more of the accumulator contact portions of the second support by at least one connector piece.
Optionally, one or more of the chamber contact portions of one of the supports are connected to one or more of the accumulator contact portions of the other of the supports by at least one connector piece.
A portion of the accumulator is optionally received in a shaped portion of the at least one connector piece to help hold the accumulator in place during installation and use.
Brief description of the drawings
A non-limiting example of the present invention will now be described with reference to the following drawings in which: Figure 1 shows a sectional side view of the accumulator arrangement on the top of a prior art high-pressure pump; Figure 2a shows a schematic isometric view of a prior art accumulator located within the auxiliary chamber of a high-pressure pump; Figure 2b shows a schematic plan view of the prior art accumulator of Figure 2a; Figure 2c shows a schematic isometric view of an accumulator according to the present invention located within the auxiliary chamber of a high-pressure pump; Figure 2d shows a schematic plan view of the accumulator of Figure 2c; Figure 3 shows an isometric schematic view of an accumulator located within an auxiliary chamber and supported by a pair of independent supports; Figure 4 shows an isometric schematic view of an accumulator located within an auxiliary chamber and supported by a support bracket; Figure 5 shows a partial sectional view of an accumulator located within an auxiliary chamber and supported by an alternative support bracket; Figure 6 shows a partial sectional view of an accumulator located within an auxiliary chamber and supported by a further alternative of a support bracket; and Figure 7 shows a partial sectional view of a modification of the support bracket shown in Figure 6.
Detailed description
Throughout this description, references to top, bottom, peak, crest, and trough portions of the component and other such directional or relative references are made in relation to the orientations of the components shown in the Figures but are not intended to be limiting.
To provide context for the invention Figure 1 shows a prior art support system for an accumulator 10 of a high-pressure pump 1. The prior art support system comprises a pair of supporting wave spacer rings 2, 4 located together with the accumulator 10 in an auxiliary chamber 5 (also commonly known as a damper cup) of the high-pressure pump 1.
As is well known in the art, the accumulator 10 is supported by wave spacer rings 2, 4 substantially in the centre of fuel space 6 of the auxiliary chamber 5. The top wave spacer ring 2 is located between a top surface of the accumulator 10 and the roof 11 of the auxiliary chamber 5, and the bottom wave spacer ring 4 is located between a bottom surface of the accumulator 10 and the top surface 7 of the top portion 9 of the high-pressure pump 1. The top surface 7 of the top portion 9 of the high-pressure pump 1 forms a base of the auxiliary cylinder 5. An sidewall 13 extends between the roof 11 of the auxiliary chamber 5 and said top surface (or base) 7.
The prior art accumulator 10 is substantially circular in plan view and the wave spacer rings 2, 4 are substantially ring shaped in plan view. The wave spacer rings 2, 4 each comprise a wave formation comprising three peaks (which may also be referred to as crests) and three troughs.
When installed together with the accumulator 10 in the auxiliary chamber 5, the top wave spacer ring 2 contacts a top surface of a peripheral rim 12 of the accumulator 10, and the bottom wave spacer ring 4 contacts a bottom surface of the peripheral rim 12 of the accumulator 10. The wave spacer rings 2, 4 are resiliently deformed when installed in the auxiliary chamber 5 so that the accumulator 10 is firmly held and pre-stressed by the wave spacer rings 2, 4.
In another embodiment of the prior art, the accumulator 10 may be held in place between one wave spacer ring 2, 4 and a formation in the sidewall 13 of the auxiliary chamber 5 which engages with one side of the accumulator 10. The formation may, for example, be an indent or shaped profile in the sidewall 13 of the auxiliary chambers.
Figure 2a shows a schematic isometric view of a prior art accumulator 10 located within an auxiliary chamber 5, and Figure 2b shows a schematic plan view of the prior art accumulator 10. As shown in Figure 2a, the prior art accumulator 10 is located within the auxiliary chamber such that a main plane 8 of the accumulator (which intersects the outermost periphery 16 of the accumulator 10) is orientated at substantially 90° to the sidewall 13 of the auxiliary chamber 5. It will be understood that because the accumulator 10 shown in Figure 2a is a schematic representation of an accumulator represented as a cylinder, the top surface of the accumulator 10 shown in Figure 2a is a plane 8 which intersects the outermost periphery 16 of the accumulator 10. This would be true of any parallel plane located between the top and bottom of the accumulator 10, and any of these planes may be referred to as a main plane of the accumulator 10. The 90° angle is shown in Figure 2a relative to the top surface of the schematic accumulator 10 for simplicity.
Since the accumulator 10 shown in Figure 2a is schematically represented as a cylinder, no projecting rim 12 is shown. It will be understood that the accumulator 10 may comprises a rim 12. In such cases, the main plane of the accumulator 10 is a plane which intersects the outermost periphery 16 of the accumulator 10 at its largest point on the rim.
Figure 2c shows a schematic isometric view of an accumulator 20 according to the invention located within an auxiliary chamber 5, and Figure 2d shows a schematic plan view of the accumulator 20. As shown in Figure 2c, the accumulator 20 is located within the auxiliary chamber 5 such a main plane 18 of the accumulator 20 (which intersects the outermost periphery 26 of the accumulator 20) is orientated at an acute angle 0 with respect to the sidewall 13 of the auxiliary chamber 5. It will be understood that because the accumulator 20 shown in Figure 2a is a schematic representation of an accumulator represented as a simple projection of an ellipse, the top surface of the accumulator 20 shown in Figure 2c is a plane 18 which intersects the outermost periphery 26 of the accumulator 20. This would be true of any parallel plane located between the top and bottom of the accumulator 20, and any of these planes may be referred to as a main plane of the accumulator 20. The acute angle 0 is shown in Figure 2c relative to the top surface of the schematic accumulator 20 for simplicity.
Since the accumulator 20 shown in Figure 22 is schematically represented as a simple projection of an ellipse, no projecting rim 12 is shown. It will be understood that the accumulator 20 may comprises a rim 12. In such cases, the main plane of the accumulator 20 is a plane which intersects the outermost periphery 26 of the accumulator 20 at its largest point on the rim.
By orientating the main plane 18 of the accumulator 20 at an acute angle 0 with respect to the internal sidewall 13 it is possible for the size of the accumulator 20 to be increased without having to increase the size of the auxiliary chamber 5. Consequently, the surface area and enclosed volume of the accumulator 20 is greater than that of an equivalent circular prior art accumulator 10.
The description of the accumulator 20 given above is with respect to an illustrated example accumulator 20 having a thickness which is less than both its width and length. It will be understood that this is an example only and the accumulator 20 is not limited to these relative proportions. In one alternative example, the accumulator 20 may be an oblate spheroid for example.
In order to maximise the surface area and volume of the accumulator 20, it is preferable to orientate the accumulator 20 so that its main plane 18 is coplanar with the plane of maximum intersecting area of the auxiliary chamber 5. The plane of maximum intersecting area of the auxiliary chamber 5 is a plane which intersects the internal volume of the auxiliary chamber 5 such that the area bounded by the intersection between the plane and the internal volume of the auxiliary chamber 5 is the maximum possible.
Packaging constraints, and other design considerations, may mean that it is not possible to position the accumulator 20 so that its main plane 18 and the plane of maximum intersecting area of the auxiliary chamber 5 coincide. Nonetheless, the surface area and internal volume of the accumulator 20 can be increased over what is possible with the prior art accumulator 10 by orientating the accumulator 20 at an acute angle with respect to the internal sidewall 13 of the auxiliary chamber 5. Preferably the accumulator 20 is orientated so that its main plane 18 aligns as closely as possible with the plane of maximum intersecting area of the auxiliary chamber 5 to realise the most benefit from the angled orientation of the accumulator 20. In any event, if alignment of the planes, or near alignment of the planes, is not possible, the main plane 18 of the accumulator 20 is preferably orientated such that the angle of separation between the main plane 18 and the plane of maximum intersecting area of the auxiliary chamber 5 is less than or equal to about 200. More preferably, the main plane 18 of the accumulator 20 is orientated such that the angle of separation between the main plane 18 and the plane of maximum intersecting area of the auxiliary chamber 5 is less than or equal to about 100. More preferably still, the main plane 18 of the accumulator 20 is orientated such that the angle of separation between the main plane 18 and the plane of maximum intersecting area of the auxiliary chamber 5 is less than 5°.
Figure 3 shows an isometric schematic view of an accumulator 20 located within an auxiliary chamber 5 and supported by a pair of independent supports 30. Each support 30 comprises a plurality of chamber contact portions 31 which are configured to bear against an inner surface of the auxiliary chamber 5 in use, and a plurality of accumulator contact portions 32 which are configured to bear against an outer surface of the accumulator 20 in use. Although not shown in Figure 3, typically the accumulator contact portions 32 are configured to bear against a rim 12 of the accumulator 20. The chamber contact portions 31 and the accumulator contact portions 32 of each support 30 are connected by connecting portions 33.
Referring to the top support with reference to the orientation of Figure 3, the plurality of accumulator contact portions 32 are substantially located in a first plane 40a, and the plurality of chamber contact portions 31 are substantially located in a second plane 41a. The first plane 40a is substantially parallel to the top surface (or main plane) of the accumulator 20 which the accumulator support portions 32 contact in use (typically the top of a rim 12), and the second plane 41a is substantially parallel to the top inner surface of the auxiliary chamber 5 which the chamber support portions 31 contact in use. Similarly, the plurality of accumulator contact portions 32 of the bottom support 30 (with reference to the orientation of Figure 3) are substantially located in a third plane 40b, and the plurality of chamber contact portions 31 are substantially located in a fourth plane 41b. The third plane 40b is substantially parallel to the bottom surface (or main plane) of the accumulator 20 which the accumulator support portions 32 contact in use (typically the bottom of a rim 12), and the fourth plane 41b is substantially parallel to the top surface 7 of the top portion 9 of the high-pressure pump 1 which the chamber support portions 31 contact in use.
When the accumulator 20 is located in the auxiliary chamber 5 the two supports 30 act to hold the accumulator at the desired acute angle 0 with respect to the sidewall 13 of the auxiliary chamber 5. The angle of separation between the first plane 40a and the second plane 41a is an acute angle substantially equal to the acute angle 0. Similarly, the angle of separation between the third plane 40b and the fourth plane 41b is an acute angle substantially equal to the acute angle 0.
Figure 4 shows an isometric schematic view of an accumulator 20 located within an auxiliary chamber 5 and supported by a support bracket 35. The support bracket 35 comprises a pair of supports 30 which are similar in most respects to the support brackets 30 described above with respect to Figure 3. However, the support bracket 35 comprises connecting pieces 34 which extend between the supports 30 and connect the two supports 30 together. In the embodiment shown, the chamber contact portions 31 are connected by the connecting pieces 34. In an alternative embodiment, the accumulator contact portions 32 could be connected together. In a further alternative, the chamber contact portions 31 of one of the supports 30 could be connected to the accumulator contact portions 32 of the other support portion 30. A combination of the connection approaches may be employed in the same support bracket 35.
Figure 5 shows an isometric partial sectional view of an accumulator 20 located inside an auxiliary chamber 5 and supported by a support bracket 35'. As shown, in this embodiment the accumulator contact portions 32 of the support bracket 35' contact the rim 12 of the accumulator 20, and the top support 30 (with reference to the orientation of Figure 5) is connected to the bottom support 30 by connector pieces 34' which connect an accumulator contact portion 32 of the top support 30 to an accumulator contact portion 32 of the bottom support 30.
Figure 6 shows an isometric partial sectional view of an accumulator 20 located inside an auxiliary chamber 5 and supported by an alternative support bracket 36. In this embodiment, part of the top of the accumulator 20 is supported by an indented portion 17 of the internal sidewall 13 of the auxiliary chamber 5. The top support 37 of the support bracket 36 comprises only one chamber contact portion 31 which is connected to an accumulator contact portion 32 of the bottom support 30 by connection pieces 38.
Figure 7 shows an isometric partial sectional view of a further alternative support bracket 36'. This embodiment is broadly similar to the support bracket 36 shown in Figure 6. However, the connector pieces 38' of the support bracket 36' are shaped On this example bent or curved) around the rim 12 of the accumulator 20 so as to form a seating groove to firmly hold the accumulator rim 12 in place at this junction region between the contact portions 32 and connector pieces 38'. It is not necessary that both connector pieces 38' be shaped provided that at least one connector piece 38' is shaped to receive a portion of the accumulator 20 in use. It will be understood that the above described embodiment is an example only and that many different configurations are possible without departing from the scope of the invention.
Claims (11)
- Claims A high-pressure fuel pump (1) comprising: a fuel inlet; a fuel outlet; a pressure chamber located between the fuel inlet and the fuel outlet; an auxiliary chamber (5) located upstream of the pressure chamber with respect to a fuel flow direction in use from the fuel inlet to the fuel outlet, wherein the auxiliary chamber (5) comprises an internal volume bounded by a sidewall (13), a roof (11) and a base (7); an accumulator (20) located in the auxiliary chamber (5), wherein an outermost periphery of the accumulator (20) substantially describes an ellipse which defines a main plane of the accumulator (20), and wherein the main plane of the accumulator (20) is orientated at an acute angle (0) with respect to the sidewall (13) of the auxiliary chamber (5); and at least one accumulator support (30) comprising one or more accumulator contact portions (32) in contact with the accumulator (20), and one or more chamber contact portions (31) in contact with the sidewall (13), the roof (11), or the base (7) of the auxiliary chamber (5)-
- 2. A high-pressure fuel pump (1) as claimed in claim 1, wherein the main plane of the accumulator (20) is located such that it is substantially coplanar with a plane of maximum intersecting area of the auxiliary chamber (5), wherein the plane of maximum intersecting area of the auxiliary chamber (5) is a plane which intersects the internal volume of the auxiliary chamber (5) such that the area bounded by the intersection between the plane and the internal volume of the auxiliary chamber (5) is at a maximum.
- 3. A high-pressure fuel pump (1) as claimed in claim 2, wherein the main plane of the accumulator (20) is orientated such that the angle of separation between the main plane of the accumulator (20) and the plane of maximum intersecting area of the auxiliary chamber (5) is less than or equal to about 20°.
- 4. A high-pressure fuel pump (1) as claimed in claim 3, wherein the angle of separation is less than or equal to about 10°.
- 5. A high-pressure fuel pump (1) as claimed in claim 4, wherein the angle of separation is less than or equal to about 5°.
- 6. A high-pressure fuel pump (1) as claimed in any one of claims 1 to 5, comprising a first accumulator support (30) located between the accumulator (20) and the roof (11) of the auxiliary chamber (5), and a second accumulator support (30) located between the accumulator (20) and the base (7) of the auxiliary chamber (5).
- 7. A high-pressure fuel pump (1) as claimed in claim 6, wherein the accumulator supports (30) are connected together.
- 8. A high-pressure fuel pump (1) as claimed in claim 7, wherein one or more of the chamber contact portions (31) of the first support (30) are connected to one or more of the chamber contact portions (31) of the second support (30) by at least one connector piece (34).
- 9. A high-pressure fuel pump (1) as claimed in claim 7, wherein one or more of the accumulator contact portions (32) of the first support (30) are connected to one or more of the accumulator contact portions (32) of the second support (30) by at least one connector piece (34').
- 10. A high-pressure fuel pump (1) as claimed in claim 7, wherein one or more of the chamber contact portions (31) of one of the supports (30) are connected to one or more of the accumulator contact portions (32) of the other of the supports (30) by at least one connector piece (38).
- 11. A high-pressure fuel pump (1) as claimed in claim 10, wherein a portion of the accumulator (20) is received in a shaped portion of the at least one connector piece (38').
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN202141060273 | 2021-12-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2614339A true GB2614339A (en) | 2023-07-05 |
| GB2614339B GB2614339B (en) | 2024-04-17 |
Family
ID=86693800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2201468.2A Active GB2614339B (en) | 2021-12-23 | 2022-02-04 | High-Pressure Fuel Pump |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2614339B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011220198A (en) * | 2010-04-08 | 2011-11-04 | Denso Corp | High-pressure pump |
| EP3121435A1 (en) * | 2015-07-20 | 2017-01-25 | Delphi Technologies, Inc. | Pulsation damper |
-
2022
- 2022-02-04 GB GB2201468.2A patent/GB2614339B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011220198A (en) * | 2010-04-08 | 2011-11-04 | Denso Corp | High-pressure pump |
| EP3121435A1 (en) * | 2015-07-20 | 2017-01-25 | Delphi Technologies, Inc. | Pulsation damper |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2614339B (en) | 2024-04-17 |
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