CN101435400A - Fuel system of internal-combustion engine - Google Patents
Fuel system of internal-combustion engine Download PDFInfo
- Publication number
- CN101435400A CN101435400A CNA2008101754104A CN200810175410A CN101435400A CN 101435400 A CN101435400 A CN 101435400A CN A2008101754104 A CNA2008101754104 A CN A2008101754104A CN 200810175410 A CN200810175410 A CN 200810175410A CN 101435400 A CN101435400 A CN 101435400A
- Authority
- CN
- China
- Prior art keywords
- fuel system
- cylinder spare
- housing
- operation equipment
- petrolift
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 63
- 238000002485 combustion reaction Methods 0.000 title claims description 8
- 239000011324 bead Substances 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 4
- 230000036316 preload Effects 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Images
Classifications
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- 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
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
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- 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
- F02M2200/28—Details of throttles in fuel-injection apparatus
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
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
The invention relates to a fuel system (10) of a gas engine (12), which is provided with a fuel feed pump (22) and an adjustable throttle device (20) for adjusting flow quantity to the fuel feed pump (22); wherein, the adjustable throttle device (20) comprises a cylinder component (38) at least a part of which is accepted in a shell (46) of the fuel feed pump (22); a valve piston (40) is guided in the cylinder component; the throttle device comprises an operating device (34) at least a part of which is arranged out of the shell (46), hermetically fixed on the shell (46) to fluid, and applied to the valve piston (40). The fuel system (10) of the gas engine (12) proposes that the cylinder component (38) is held on a shell section (58) of the operating device (34) with at least an angle clearance and/or a radial clearance.
Description
Technical field
The present invention relates to fuel system according to the internal-combustion engine of the preamble of claim 1.
Background technique
By DE 19,731 994 A1 known a kind of fuel system, it comprises a prime transfer pump, this prime transfer pump transports the fuel from a fuel tank.Fuel arrives a high pressure fuel pump from the prime transfer pump through an adjustable throttling arrangement that is called as batching unit, and this high pressure fuel pump is with the fuel compression and supply with a fuel storage device (" rail ").On this fuel storage device, be connected with a plurality of fuel injectors.
DE 10 2,005 033 634 A1 have also described this fuel system with adjustable throttling arrangement, and this throttling arrangement comprises a valve piston that leads in a cylinder spare.Cylinder spare is engaged in the hole of shell of fuel pump.Cylinder spare is connected rigidly with a housing section of operation equipment.
Summary of the invention
Task of the present invention is, provides a kind of fuel system, but wherein is conditioned to the transmission power pinpoint accuracy of petrolift, and has little manufacture cost simultaneously.
The fuel system of the feature of this task by having claim 1 solves.Favourable further configuration of the present invention provides in the dependent claims.In addition, key character of the present invention can obtain from the following description and accompanying drawing, wherein, these features both can be individually also fully various combination ground and need not this is pointed out significantly as essence of the present invention.
In fuel system according to the present invention, the longitudinal axis of the relative operation equipment of longitudinal axis of the cylinder spare of pilot valve piston can have an angle that is not equal to 180 ° therein, or in other words: cylinder spare operation equipment relatively is provided with a little obliquely, and this can not import moment of flexure thus in cylinder spare, and this moment of flexure will cause the distortion of endoporus of the pilot valve piston of cylinder spare.Therefore cylinder spare can relatively freely reach influence ground orientation in the housing of petrolift of the housing section that is not subjected to operation equipment.Manufacture cost is reduced, because at first operation equipment is must be with the housing of the little relative petrolift of cost directed or can come directed with bigger tolerance.The targeting part of valve piston in cylinder spare can improve the validity of fuel metering in addition, because can promptly still not keep the cooperation between these parts owing to the inclination between cylinder spare and the operation equipment is out of shape.
First further configuration Zhong Jiao gap the constituting by radial clearance and axial clearance according to fuel system of the present invention.This can realize on manufacturing technology simply.But also can consider for example maintenance of spherical pair form basically.
Propose in to this one concrete further configuration, the end section of cylinder spare reaches in the dead slot that is received in the housing section at least in part with having gap, angle and/or radial clearance.This is the simple escapable cost thus that reaches on manufacturing technology.
In another specific embodiment, propose, in described end section and dead slot, has the groove of at least roughly relatively arranging, in these grooves, cooperate a holding member, spring ring for example, this spring ring relatively at least one in these two grooves have axial clearance and relatively at least one in these two grooves have a radial clearance.Therefore this spring ring constitutes holding member, it make cylinder spare Drop-proof after the preassembly remain on the housing section of operation equipment, this holding member and the geometric configuration of two grooves provide the described gap of the housing section of relative operation equipment together, and this gap does not have distortion for cylinder spare and do not have an active force in shell of fuel pump orientation is essential.
Preferably, spring ring is preloading the footpath that abuts at least in part diametrically down in described two grooves upwards on the base portion of that outside groove.This has its advantage, that is, spring ring can be owing to the vibration in the petrolift work not for example be moved in groove in assembled state, but that the footpath that keeps certain makes progress is fixing.Spring force by spring ring in addition, cylinder spare in the axial direction relatively the housing section of operation equipment come directed, this make adjustable throttling arrangement on shell of fuel pump in or the installation on it become easy.Can find out directly that in the case not only spring ring but also two grooves can have big relatively tolerance, and can not lose according to advantage of the present invention.Therefore according to the low cost of manufacture of fuel system of the present invention.
A mapping mode of the above-mentioned connected system of being made up of groove and spring ring is, cylinder spare links by the housing section that is clamped and connected with operation equipment after preassembly.Under this situation about being clamped and connected, reduced the number of parts that needs operation.This has simplified supporting and assembling again.In this being clamped and connected, projection on one in these parts can be used for connection or the Drop-proof of cylinder spare on the housing section of operation equipment, this projection is coupled in the mounting point in the respective grooves of another parts, or is engaged in the back of the corresponding projection of relative parts.
When the housing section of operation equipment with the maintenance position of cylinder spare near with the housing welding mutually of petrolift, press fit or when being threaded, will be more obvious according to the advantage of fuel system of the present invention.This Placement of the housing of operation equipment and petrolift can realize simply, and obtains good fluid-tight, but not according to measure of the present invention, this Placement can cause the danger of cylinder spare distortion to increase.Even under situation about connecting, also brought advantage according to gap, angle of the present invention or according to radial clearance of the present invention by compacting or repousse.
As the more specifically claimed a kind of fuel system of the present invention; wherein; the housing section of operation equipment is configured to columnar link; this link has a bead of extending vertically, this bead upcountry be configured for diametrically receiving cylinder spare an end section dead slot and outwards have with being welded to connect of the housing of petrolift diametrically, press fit is connected or be threaded (or also can be compacting or repousse connection).
Description of drawings
Below will be described in detail embodiments of the invention by accompanying drawing.Represent in the accompanying drawing:
Fig. 1: sketch plan with fuel system of a high pressure fuel pump and an adjustable throttling arrangement;
Fig. 2: adjustable throttling arrangement section among Fig. 1;
Fig. 3: the zoomed-in view in a zone among Fig. 2;
The stereogram of adjustable throttling arrangement spring ring among Fig. 4: Fig. 2 and 3; And
Fig. 5: the view of similar Fig. 3 of the form of implementation of a conversion.
Embodiment
Fuel system among Fig. 1 is always with label 10 indications.This fuel system is used for internal-combustion engine 12 fuelings, and this internal-combustion engine is summarily represented by dot and dash line in Fig. 1.
Fuel system 10 comprises that 14, one of fuel containers are transported to fuel among the section 18a of a low pressure line 18 by this fuel container by electrically driven (operated) prime transfer pump 16 usually.This section 18a leads to an adjustable throttling arrangement 20, and this throttling arrangement is also referred to as " batching unit " and also will describes in more detail it in the back.
The section 18b of low pressure line 18 leads to a piston type high pressure fuel pump 22 that is mechanically driven by internal-combustion engine 12 from throttling arrangement 20.This piston type high pressure fuel pump is reduced to fuel pressure a very high pressure and is transported to a high-pressure fuel storage 26 by pressure duct 24, and this high-pressure fuel storage is also referred to as " rail ".Connecting a plurality of spargers 28 on this rail, they inject fuel in the unshowned firing chamber of internal-combustion engine 12.
The work of this fuel system 10 is subjected to the control or the adjusting of control and controlling device 30.This control and controlling device obtain signal by a pressure transducer 32 that detects the pressure in the high-pressure fuel storage 26.Control and controlling device 30 are controlled the operation equipment 34 of an electromagnetism according to these signals of pressure transducer 32, and this operation equipment belongs to adjustable throttling arrangement 20 and with the throttling action that is used for regulating throttling arrangement 20 of a spring 36 of the opposing of methods in greater detail.
The theory structure of this adjustable throttling arrangement 20 is described referring now to Fig. 2 and 3: valve piston 40 convection cell basically reaches hermetically slidably and is directed in a cylinder spare 38.Corresponding pilot hole in the cylinder spare 38 is indicated with 42.It only is to seal in the receiving hole 44 of the housing 46 represented by dot and dash line and by seal ring 48 relative these receiving holes that cylinder spare 38 is received among Fig. 2 of high pressure fuel pump 22.In the peripheral wall of cylinder spare 38, be provided with a plurality of exhaust ports 52 being provided with a plurality of entry ports of being distributed on the circumference 50 on one first axial position and being arranged on second axial position in valve piston 40 zones.Entry port 50 finally is communicated with the section 18a of low pressure line 18.Exhaust port 52 is communicated with a conveying chamber of high pressure fuel pump 22 by a unshowned valve that enters.On valve piston 40, be provided with a control edge 54.Decide position on control edge 54 relative exhaust ports 52, and these exhaust ports are hidden by valve piston 40 more or less, and thus, the flow of conveying chamber that arrives high pressure fuel pump 22 is more or less by throttling.
Valve piston 40 is connected with a needle 56 that extends longways, this needle penetratingly extends in the housing section 58 of operation equipment 34, this housing section is configured to columnar link, deviates from this needle on the end of valve piston 40 and is fixing an armature 60.This operation equipment 34 also comprises the electromagnetic coil 62 and the grafting section 64 that is used to connect the electric control circuit that surround armature 60.
As especially appreciable by Fig. 3, the housing section 58 of operation equipment 34 has a housing 46 and a upwardly extending bead 66 of axle towards high pressure fuel pump 22.This bead radially inwardly limits a dead slot 68.On the radially inner side of bead 66, be provided with one around circular groove 70.On the radial outside of bead 66, be configured with a footpath upwards around and extend diametrically welding filler ring 72, housing section 58 by this welding filler ring by one around weld seam 74 and the housing 46 of high pressure fuel pump 22 form being connected that convection cells seal.
The end that the housing section 58 towards operation equipment 34 of cylinder spare 38 extends constitutes an end section 76, and this end section has and is received in the dead slot 68 that the bead 66 by housing section 58 constitutes with radially reaching axial clearance.The end face 77 of end section 76 is configured to sphere or ball-shaped.A little gap 78 between the radially inner side of this radial clearance radial outside by end section 76 and bead 66 in Fig. 3 is represented.This axial clearance can not be in sight in Fig. 2 and 3.In end section 76 its outside on be configured with one around circular groove 80, in the mounting point shown in Fig. 2 and 3, circular groove 80 is relative with the circular groove 70 of bead 66.In circular groove 70, be provided with a spring ring 82 (also referring to Fig. 4) and this spring ring in this wise directly upwards outwards by preload, make this spring ring under tension force, abut on the base portion (unlabelled) of circular groove 70.Spring ring 82 is generally fixed.
By Fig. 2 and 3 as can be seen, spring ring 82 both had been engaged in and also had been engaged in the circular groove 70 in the circular groove 80, thus cylinder spare 38 after the preassembly just anticreep land on the housing section 58 that remains on fixing device 34.But have a gap radially simultaneously between the base portion of spring ring 82 and circular groove 80, in addition, spring ring 82 is because less relative two circular grooves 70 of its width and 80 have axial gap.Have following effect thus:
At first, in the end before the assembling, on the one hand operation equipment 34 and on the other hand high pressure fuel pump 22 are the parts that are separated from each other.And operation equipment 34 has just comprised cylinder spare 38 after preassembly, this cylinder spare land by spring ring 82 anticreeps but relatively housing section 58 have with radially reaching axial clearance and remain on the housing section 58.By the combination of this axial clearance and radial clearance, the housing section 58 of cylinder spare 38 relative operation equipment 34 also has an angular clearances.In the case, cylinder spare 38 is axially directed by the housing section 58 of the relative operation equipment 34 of spring force of spring ring 82 radially outwards sensing.
For preassembled operation equipment 34 is installed on the housing 46 of high pressure fuel pump 22, cylinder spare 38 is inserted in the receiving hole 44 of housing 46 of high pressure fuel pump 22.Make being connected of that housing section 58 and housing 46 forms rigidity and convection cell sealing by weld seam 74 then.Because the maintenance that has the gap of cylinder spare 38 relative housing sections 58, even housing section 58 connects the longitudinal axis of batter 44 and thus relatively the deflection of cylinder spare 38 also can not cause the distortion of cylinder spare 38, this deflection for example can cause when formation weld seam 74.In the case, the ball type of contact surface 77 on the axial end portion of the end section 76 by cylinder spare 38 makes the angle compensation between cylinder spare 38 and the housing section 58 become simple.Between valve piston 40 and the pilot hole 42 cooperate closely and thus the good mobility under high fluid-tight implementations be held.
Fig. 5 represents the form of implementation of a conversion.Among this figure with above figure in component and parts and the zone of zone with identical function be provided with identical label.Thus they are no longer explained.
With the described high pressure fuel pump 22 of Fig. 2 to 4 differently, on the high pressure fuel pump of Fig. 5, cylinder spare 38 is not by spring ring with housing section 58, but is connected by being clamped and connected or is remaining on after the preassembly on this housing section.On the radially inner side of bead 66 be not for this reason the structure groove but construct one around rib 86, bead 66, its next door be configured with rib 86 axially on end section 88 have the thickness significantly littler than the remaining part of bead 66.
If now its end section of cylinder spare 38 usefulness 76 is inserted in dead slots 68, then flexibly outwards distortion of the end section 88 of bead 66 is till rib 86 is coupled in the circular groove 80 in the end section 76 of cylinder spare 38.Here can see also by Fig. 5 that rib 86 relative circular grooves 80 had both had a radial clearance and also had an axial clearance.It is evident that, also can not use rib 86, a few projection on end section 88 inboards of bead 66 just is enough on the housing section 58 that cylinder spare 38 anticreeps is landed remain on operation equipment 34, and has simultaneously axially and gap radially.
Claims (8)
1. the fuel system (10) of an internal-combustion engine (12), have a petrolift (22) and and be used to be adjusted to adjustable throttling arrangement (20) of the flow of this petrolift (22), wherein, this throttling arrangement (20) comprises a cylinder spare (38), this cylinder spare is received in the housing (46) of this petrolift (22) at least in part, one valve piston (40) is directed in this cylinder spare, this throttling arrangement comprise one be at least partially disposed on outside this housing (46) and convection cell be fixed on hermetically on this housing (46), be used for the operation equipment (34) of this valve piston (40), it is characterized in that: described cylinder spare (38) remains on the housing section (58) of described operation equipment (34) with having gap, angle and/or radial clearance at least.
2. according to the fuel system (10) of claim 1, it is characterized in that: gap, described angle by radially with the constituting of axial gap.
3. according to the fuel system (10) of claim 2, it is characterized in that: an end section (76) of described cylinder spare (38) reaches in the dead slot (68) that is received in the described housing section (58) at least in part with having gap, angle and/or radial clearance.
4. according to the fuel system (10) of claim 3, it is characterized in that: in described end section (76) and dead slot (68), have the groove (70 that at least roughly relatively is provided with, 80), in these grooves, cooperate a spring ring (82), this spring ring is these two grooves (70 relatively, 80) at least one in have an axial clearance and relatively at least one in these two grooves (70,80) have a radial clearance.
5. according to the fuel system (10) of claim 4, it is characterized in that: described spring ring (82) is on a base portion that preloads the groove (70) that abuts in radially outer down diametrically at least in part.
6. according to each fuel system (10) in the claim 1 to 3, it is characterized in that: described cylinder spare (38) links by the housing section (58) of a clip connection set (86) with described operation equipment (34).
7. according to each fuel system (10) in the above claim, it is characterized in that: described housing section (58) with the retained part of described cylinder spare (38) near with described housing (46) welding, the press fit of petrolift or be threaded.
8. according to the fuel system (10) of claim 7, it is characterized in that: the housing section (58) of described operation equipment (34) is configured to columnar link, this link has an axially extended bead (66), this bead upcountry constitute diametrically one be used to receive described cylinder spare (38) an end section (76) dead slot (68) and outwards have diametrically with the housing (46) of described petrolift (22) be welded to connect (74), press fit is connected or be threaded.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007053800.8 | 2007-11-12 | ||
| DE200710053800 DE102007053800A1 (en) | 2007-11-12 | 2007-11-12 | Fuel system for internal-combustion engine, has fuel pump and adjustable throttle device for adjusting supply for fuel pump, where cylinder section is retained at housing section of actuation equipment with angle play or radial play |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101435400A true CN101435400A (en) | 2009-05-20 |
Family
ID=40530618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101754104A Pending CN101435400A (en) | 2007-11-12 | 2008-11-12 | Fuel system of internal-combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101435400A (en) |
| DE (1) | DE102007053800A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010063277B4 (en) * | 2010-12-16 | 2013-11-07 | Continental Automotive Gmbh | casing |
| FR3009363B1 (en) * | 2013-07-31 | 2016-06-03 | Delphi Tech Holding S A R L | CLIPSE ARRANGEMENT OF A VALVE ON A PUMP |
| FR3009344B1 (en) | 2013-07-31 | 2015-08-07 | Delphi Technologies Holding | INTEGRATED ARRANGEMENT OF A HIGH PRESSURE VALVE AND AN INJECTION RAMP |
| DE102017207991A1 (en) * | 2017-05-11 | 2018-11-15 | Robert Bosch Gmbh | Fuel delivery device for a fuel injection system and fuel injection system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19731994B4 (en) | 1997-07-25 | 2007-11-15 | Robert Bosch Gmbh | Method and device for controlling an internal combustion engine |
| DE102005033634A1 (en) | 2005-07-19 | 2007-01-25 | Robert Bosch Gmbh | High-pressure fuel pump for a fuel injection system of an internal combustion engine |
-
2007
- 2007-11-12 DE DE200710053800 patent/DE102007053800A1/en not_active Withdrawn
-
2008
- 2008-11-12 CN CNA2008101754104A patent/CN101435400A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007053800A1 (en) | 2009-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20090520 |
|
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |