WO2002016752A1 - Fuel feed device - Google Patents

Fuel feed device Download PDF

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Publication number
WO2002016752A1
WO2002016752A1 PCT/JP2000/005527 JP0005527W WO0216752A1 WO 2002016752 A1 WO2002016752 A1 WO 2002016752A1 JP 0005527 W JP0005527 W JP 0005527W WO 0216752 A1 WO0216752 A1 WO 0216752A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
fuel
burrs
end faces
contact
Prior art date
Application number
PCT/JP2000/005527
Other languages
English (en)
French (fr)
Inventor
Shigeki Kanamaru
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to CNB008143552A priority Critical patent/CN1215256C/zh
Priority to US10/110,694 priority patent/US6729308B1/en
Priority to DE2000626852 priority patent/DE60026852T2/de
Priority to EP20000953483 priority patent/EP1310663B1/en
Priority to PCT/JP2000/005527 priority patent/WO2002016752A1/ja
Priority to TW89117346A priority patent/TW467997B/zh
Publication of WO2002016752A1 publication Critical patent/WO2002016752A1/ja

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/103—Mounting pumps on fuel tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/111—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
    • B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
    • 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
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
    • B01D35/0273—Filtering elements with a horizontal or inclined rotation or symmetry axis submerged in tanks or reservoirs
    • 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
    • B01D35/30—Filter housing constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/44—Filters structurally associated with pumps
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/50—Filters arranged in or on fuel tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0005—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7172—Fuel tanks, jerry cans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/7496—Pumps
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/30—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by heating means

Definitions

  • the present invention relates to a fuel supply device which pressurizes and supplies fuel from a fuel tank to an internal combustion engine or the like, and more particularly to an effect of a burr generated when a housing including a fuel flow path is formed by welding a resin member. It is to prevent.
  • FIGS. 4 and 5 show a conventional fuel supply device disclosed in International Publication No. WO 96/23967, in which FIG. 4 is a side sectional view, FIG. 5 is a plan view, and FIG. FIG. 6 is an explanatory view of hot plate welding for forming a housing, and FIG. 7 is a view showing an XYZ cross section of FIG.
  • 1 is a fuel tank
  • 2 is an opening of the fuel tank 1.
  • a cover 3 made of synthetic resin is provided so as to cover the opening 2, and a seal gasket 4 is interposed between the cover 3 and the fuel tank 1.
  • a fuel pump 5, a fuel filter 6, a pressure regulator 7, a fuel level gauge 8, an electrical connector 9, and a discharge pipe 10 as functional parts of the fuel supply system are integrally mounted on the lid 3 as a unit.
  • the fuel filter 6 is configured by housing a filtration element 12 in a housing 11. Moreover, the lid 3 is part of the housing 11 and is suspended from the lid 3.
  • the housing 11 includes a lid 3 as an upper housing and a lower housing 13, and the lower housing 13 is formed of a synthetic resin material. The entire circumference of the lid 3 and the lower housing 13 is welded in a liquid-tight manner at the boundary 14, and the filtration element 12 is disposed in the internal space. It is.
  • An inlet pipe 15 as a fuel inlet is provided above the inner peripheral side of the housing 11 of the fuel filter 6, and is connected to a discharge pipe of the fuel pump 5.
  • a pipe 16 (indicated by a dashed line in FIG. 4) forming the first fuel outlet of the two fuel outlets of the housing 11 is provided on the lid 3 so as to extend upward from the lower end of the lower housing 13. It communicates with the discharge pipe 10.
  • a return pipe 18 serving as a second fuel outlet is provided at a lower portion of the lower housing 13 and is connected to the pre-shaper radiator 7.
  • An electric connector 8 integrally formed with the lid 3 is connected to a power supply and a control device (not shown) outside the fuel tank 1.
  • the fuel tank 1 is connected to the fuel pump 5 via a lead wire (not shown) to supply electric power to the motor of the fuel pump 5 and the fuel level gauge 8 via a lead wire (not shown). (Shown in Fig. 8) and transmits an electric signal indicating the liquid level.
  • the lower housing 13 is made of conductive synthetic resin
  • the fuel pump 5 when electric power is supplied to the fuel pump 5 through the electric connector 8, the fuel pump 5 sucks and pressurizes the fuel through the filter 19, and pressurizes the fuel inside the housing 11. Discharge to the inlet pipe 15 above the circumferential side.
  • the fuel flows through the passage 20 between the lower housing 13 and the lid 3 in the direction of arrow A.
  • the fuel filter 6 the fuel flows from the top to the bottom in the housing 11, and dust and the like in the fuel are filtered while passing through the filtering element 12.
  • the fuel that has passed through the filtration element 12 is supplied from a pipe 16 through a discharge pipe 10 to an injector (not shown) of the engine fuel injection device.
  • the fuel supply pressure to the injector is adjusted to a constant level in the pressure regulator 7 and excess fuel due to fluctuations in consumption is returned to the fuel tank 1 again from the pressure regulator 7 in the pressure regulator.
  • the entire periphery of the lid 3 and the lower housing 13 at the boundary portion 14 is welded in a liquid-tight manner.
  • hot plate welding is applied to this welding.
  • the end surfaces of the lower housing 13 and the lid 3 to be welded are heated to the melting temperature by the hot plate 30 of the heating source, the hot plate 30 is removed, and the two joining end surfaces The two are pressurized and welded.
  • the cross section of the welded portion formed by hot plate welding is such that the end portion of the welded portion is extruded by pressurization to form a burr 21.
  • the size and shape of the burr 21 vary depending on the molten state of the joining end face and the amount of pressing and moving by pressing. For this reason, the vertical dimension of the housing 11 varies.
  • the burrs 21 protruding into the area corresponding to the fuel flow path reduce the flow path area, thereby increasing the flow path resistance, and the pulsation of the fuel flow causes the deformation stress of the burr 21.
  • the weak portion of the burr 21 may cause fatigue failure and fall off.
  • burr 21 of the welded portion located upstream of the filter element 12 of the fuel filter falls off, it will be captured by the filter element 12 but will be caught by the filter element 12. If the burrs 21 at the welding part located downstream fall off, there is a shortage of fuel supply due to clogging of the downstream piping, or engine malfunction due to clogging of the nozzle of the injector located downstream. There was a risk of causing a malfunction. '
  • the present invention has been made to solve the above-described problems, and its object is to suppress variations in the vertical dimension of the housing due to hot plate welding, and to prevent burrs from protruding into the flow path, and Even if the burr falls off, a fuel supply device that does not allow the burr to flow out to the flow path is provided.
  • the fuel supply device is configured such that an upper housing made of a synthetic resin is used for forming a flow path of a fuel liquid supplied from a fuel pump in a housing.
  • the housing and the lower housing are heat-welded to form a liquid-tight housing, and the upper housing and the lower housing are provided with abutting ribs, which are one step lower than the bonding end, and are in contact with each other.
  • the welded end faces are melt-welded and heat-welded so that the ribs come into contact.
  • a contact rib is provided along the joint end face with a gap groove interposed therebetween, and the gap groove is formed in a closed pool space at the time of completion of the heat welding, and the burrs that fly out during the heat welding are left in the pool space. It is like that.
  • at least a reservoir space formed by the contact rib is provided in a flow path downstream of the filtration element.
  • FIG. 1 is a diagram c Figure 2 is a side sectional view of a fuel supply system showing Embodiment 1 of the present invention is to describe the hot plate welding of the housing formed of the present invention.
  • FIG. 3 is an enlarged partial cross-sectional view of a completed welding part according to the present invention.
  • FIG. 4 is a side sectional view of a conventional fuel supply device.
  • FIG. 5 is a plan view of a conventional fuel supply device.
  • FIG. 6 is an explanatory view of hot plate welding for forming a housing.
  • FIG. 7 is a diagram showing a cross section of XYZ of FIG.
  • FIG. 1 is a side sectional view of a fuel supply device showing Embodiment 1 of the present invention, and FIG. Fig. 3 and Fig. 3 show the completed welding It is a figure which shows the enlarged partial cross section of a part.
  • 1 to 21 and 30 are the same as those described in the conventional apparatus.
  • the lid 3 and the lower housing 13 are formed of a synthetic resin material.
  • 3a is a joint end face of the lid 3 forming the upper part of the housing 11;
  • 3b is a contact rib provided along the joint end face 3a at a position lower than the joint end face 3a;
  • 3c is a joint end face This is a gap groove provided between 3a and the contact rib 3b.
  • Reference numeral 13a denotes a joining end face of the lower housing 13.
  • the joining end face 13a of the lower housing 13 and the joining end face 3a of the lid 3 are welded and joined to form a boundary portion 14.
  • the end face of the partition wall of the housing 11 perpendicular to the boundary 14 is the joining end face 3a, 13a, and the lid 3 and the lower housing 13 are welded and joined at the joining end faces 3a, 13a. Thereby, the outer shell and the flow path of the housing 11 are formed in a liquid-tight manner.
  • 13 b is a contact rib provided along the joint end face 13 a and one step lower than the joint end face 13 a.13 c is between the joint end face 13 a and the contact rib 13 b.
  • hot plate welding of the heat source 30 between the lid 3 and the lower housing 13 is performed between the joining end face 3a of the lid 3 and the joining end face 13a of the lower housing 13. With the both end faces heated to the melting temperature while being sandwiched, the hot plate 30 is removed and the end faces are pressurized and welded in a liquid-tight manner.
  • the two contact ribs 3b and 13b are located one step lower than the joint end faces 3a and 13a, they do not reach the melting softening temperature, so that they are not deformed even when pressed.
  • a pool space 22 is formed by the two void grooves 3c and 13c.
  • the burrs 21 generated by pressurized deformation of the joint end surfaces of the lid 3 and the lower housing 13 can be retained in the pool space 22. Therefore, by forming the reservoir space 22 on the side where the liquid flow is present, the flow path surface due to the ejection of the valley 21 is formed. Prevents narrowing of the product and prevents burrs 21 from falling off due to liquid flow pulsation. Even if burrs 21 fall off, burrs 21 remain in pool space 22 to prevent outflow downstream. Therefore, clogging of the downstream piping can be prevented.
  • gap grooves 3c, 13c and abutment ribs 3b, 13b are provided in the peripheral ring of the joint end face, but the cross-sectional area of the fuel supply device is large, and the size of the device is small. Contrary to Therefore, the contact ribs 3b and 13b may be provided in a dotted arrangement such that the dimensions after heat welding are stabilized in a portion where there is no trouble due to the glue 21. In addition, the burrs 21 accumulate only in the area where the detachment of the burrs interferes with the fuel system.
  • An interval 22 may be formed, and the other portions may have the conventional welding structure.
  • the operation of supplying the fuel liquid by driving the fuel pump 5 is the same as that of the conventional device, and the description is omitted.
  • the present invention is at a position one step lower than the joining end faces 3a, 13a along the joining end face 3a of the lid 3 and the joining end face 13a of the lower housing 13. Since the contact ribs 3b and 13b are provided with the gap grooves 3c and 13c interposed therebetween, the contact ribs 3b and 13c are used when heating both joint end faces and press-welding the joint end faces to each other. Deformation of the joint end surface stops at the position where b and 13b abut, and the completed vertical dimension of the housing 11 stabilizes.
  • the space 22 formed on the flow channel side when welding is completed retains the burr 21 generated by the pressurized deformation, preventing the flow channel area from being narrowed and preventing the flow volume from pulsating due to the liquid flow pulsation. Suppresses falling off, keeps the dropped burr 21 in the storage space 22 and prevents clogging of downstream piping.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Filtration Of Liquid (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Feeding And Controlling Fuel (AREA)

Description

明 細 書
燃料供給装置
技術分野 この発明は、 燃料タ ンクから内燃機関などへ燃料を加圧して供給する 燃料供給装置に関し、 特に燃料流路を含むハウジングを樹脂部材の溶着 によ り形成する際にできるバリの影響を防ぐものである。
背景技術 図 4、 図 5は、 国際公開番号 W O 9 6 / 2 3 9 6 7号公報に示された 従来の燃料供給装置を示すもので、 図 4は側断面図、 図 5は平面図、 図 6はハウジング形成の熱板溶着の説明図、 図 7は図 5の X— Y— Z断面 を示す図である。
図において、 1は燃料タンク、 2は燃料タンク 1の開口部である。 この開口部 2を塞ぐように合成樹脂製の蓋 3が設けられ、 蓋 3と燃料タンク 1との間にはシ ール用のガスケヅ ト 4が介装されている。
蓋 3には燃料供給系の機能部品としての燃料ポンプ 5、 燃料フィルタ 6、 プレ ツシャレギュレ一タ 7、 燃料液面計 8、 電気コネクタ 9、 吐出配管 1 0がー体的 に組付けられユニッ ト化されている。
燃料フィルタ 6は、 ハウジング 1 1 内に濾過エレメ ン ト 1 2 を収容し て構成されている。 しかも、 蓋 3 をハウジング 1 1 の一部としてお り、 蓋 3から吊下げられている。 ハウジング 1 1は、 上ハウジングである蓋 3 と下ハウジング 1 3 とから成り、 下ハウジング 1 3 は、 合成樹脂材料 によ り成形されている。 この蓋 3 と下ハウジング 1 3 とは境界部 1 4で 全周を液密に溶着されてお り、 内部空間に濾過エレメ ン ト 1 2 が配置さ れる。
燃料フィルタ 6のハウジング 1 1の内周側上方には、 燃料入口としての入口管 1 5が設けられており、燃料ポンプ 5の吐出管と接続されている。
ハウジング 1 1 の二つの燃料出口のう ちの第 1 の燃料出口を形成する 配管 1 6 (図 4では一点鎖線で示す） は下ハウジング 1 3の下端から上 方向へ延びて蓋 3 に設けられた吐出配管 1 0 に連通している。
第 2 の燃料出口である リ ターン管 1 8 は、 下ハウジング 1 3 の下部に 設けられてお り、 プレツシャ レギユレ一夕 7 に接続されている。
蓋 3 と一体成形されている電気コネクタ 8は、 燃料タ ンク 1外におい て電源および制御装置 （図示せず） に接続されている。 また、 燃料タン ク 1 内において、図示しないリー ド線を介して燃料ポンプ 5 に接続され、 燃料ポンプ 5のモー夕に電力を供給する とともに、 図示しない リー ド線 を介して燃料液面計 8 (図 8 に示す） に接続され液面高さを示す電気信 号を伝えている。
また、 下ハウジング 1 3は導電性合成樹脂製で成形されてお り、 濾過
'エレメ ン ト 1 2 を燃料が通過する とき発生する静電気を電気コネクタ 8 を通じて放散させている。
このよう に構成された燃料供給装置では、 電気コネクタ 8 を通じて燃 料ポンプ 5 に電力が供給される と、 燃料ポンプ 5 はフィ ルタ 1 9 を通し て燃料を吸入加圧して、 ハウジング 1 1 の内周側上方の入口管 1 5へ送 出する。
燃料は、 下ハウジング 1 3 と蓋 3 との間の通路 2 0 を矢印 A方向に流 れる。燃料フ ィ ルタ 6 内では燃料がハウジング 1 1 の中を上から下へと 流れ、濾過エレメ ン ト 1 2 を通過中に燃料中の塵埃等は濾過される。 濾過エレメ ン ト 1 2 を通過した燃料は配管 1 6から吐出配管 1 0 を通 つてエンジン燃料噴射装置のイ ンジヱクタ （図示していない） に供給さ れる。 このとき、 プレ ツシャ レギユレ一夕 7でイ ンジェクタへの燃料供 給圧力を一定に調整して消費量変動によ り余剰となる燃料をプレッシャ レギユレ一夕 7から再び燃料夕 ンク 1 内に戻される。 ここで、 蓋 3 と下ハウジング 1 3 とは境界部 1 4で全周を液密に溶着 する構成と しているが、 この溶着には一般的に熱板溶着が適用される。 熱板溶着は図 6 に示すよう に下ハウジング 1 3 と蓋 3 の溶着する端面を 加熱源の熱板 3 0で溶融温度に加熱しておいて、 熱板 3 0 を取り除き双 方の接合端面同士を加圧して熱溶着させる。
熱板溶着による溶着部の断面は、 図 7に示すように加圧によ り溶融部 分の端部は押し出されてバリ 2 1 を形成する。 接合端面の溶融状態、 加 圧しての押圧移動量によ り バリ 2 1 は大きさ、 形状に'バラ ツキが発生す る。 このため、 ハウジング 1 1 の縦寸法にバラヅキを生ずる。 また、 燃 料の流路にあたる部位に飛び出したバリ 2 1が流路面積を狭く して、 流 路抵抗を増大させるととも に、 燃料流の脈動がバリ 2 1 の変形ス ト レス とな り、 バリ 2 1 の弱い部分が疲労破壊を起こ し脱落することがある。 燃料フィルタの濾過エレメ ン ト 1 2 よ り上流に位置する溶着部のバリ 2 1 が脱落した場合には、 濾過エレメ ン ト 1 2 に捕捉されるが、 濾過ェレ メ ン ト 1 2 よ り下流に位置する溶着部のバリ 2 1 が脱落した場合には、 下流配管の詰ま り による供給燃料不足が生じた り、 下流に配設されるィ ンジェクタのノズル部への詰ま り によるエンジン不調といった不具合を 引起す恐れがあった。 '
この発明は上記のような問題点を解決するためになされたものでその目的 は、 熱板溶着によるハウジング縦寸法のバラツキを抑制するとともに、 流 路にバリが飛び出さず、 万が一に溶着部のバリが脱落した場合において も、 脱落したバリ を流路へ流出させない燃料供給装置を提供するも'ので ある。
発明の開示 この発明に係る燃料供給装置は、 燃料ポンプから送給される燃料液の 流路をハウジング内に形成するにあた り、 合成樹脂からなる上ハウジン グと下ハウジングの接合端面を熱溶着によ り液密にハウジングを形成し- 上ハゥジングぉよび下ハゥジングはそれぞれ接合端面よ り一段低い互い に対向する当接リ ブを設け、 双方の当接リ ブが当接するように接合端面 を溶融圧接して熱溶着したものである。 そして、 接合端面に沿って空隙溝を介在させて当接リ ブを設け、 熱溶 着完成時に空隙溝を閉鎖された溜り空間に形成し、 熱溶着時に飛出すバ リを溜り空間に残存させるよう にしたものである。 また、 少な く とも濾過エレメ ン トの下流の流路に当接リ ブによ り形成 される溜 り空間を設けるものである。
図面の簡単な説明 図 1 はこの発明の実施の形態 1 を示す燃料供給装置の側断面図である c 図 2はこの発明のハウジング形成の熱板溶着を説明する図である。 図 3はこの発明の溶着完成部の拡大部分断面図である。 図 4は従来の燃料供給装置の側断面図である。 図 5は従来の燃料供給装置の平面図である。 図 6はハゥジング形成の熱板溶着の説明図である。 図 7は図 5の X— Y— Z断面を示す図である。
発明を実施するための最良の形態 実施の形態 1 . 図 1 はこの発明の実施の形態 1 を示す燃料供給装置の側断面図である , 図 2は、 この発明のハウジング形成熱板溶着の説明図、 図 3は溶着完成 部の拡大部分断面を示す図である。 図において、 1〜 2 1、 3 0は上記 従来装置での説明と同様のものである。
蓋 3及び下ハウジング 1 3 は合成樹脂材料によ り成形されている。 3 aはハウジング 1 1 の上部を形成する蓋 3の接合端面、 3 bは接合端面 3 aに沿って接合端面 3 aよ り一段低い位置に設けられた当接リ ブ、 3 cは接合端面 3 a と当接リ ブ 3 bの間に設けられた空隙溝である。 1 3 aは下ハウジング 1 3 の接合端面であ り、 この下ハウジング 1 3の接合 端面 1 3 a と蓋 3 の接合端面 3 aが溶着接合されて境界部 1 4 となる。 境界部 1 4 と垂直なハウジング 1 1 の仕切り隔壁の端面が接合端面 3 a、 1 3 aであ り、 蓋 3 と下ハウジング 1 3 を接合端面 3 a、 1 3 aで溶着 接合するこ とによ り、 ハウジング 1 1 の外殻および流路が液密に形成さ れる。
1 3 bは接合端面 1 3 aに沿って接合端面 1 3 aよ り一段低い位置に 設けられた当接リ ブ、 1 3 cは接合端面 1 3 aと当接リ ブ 1 3 bの間に 設けられた空隙溝である。 蓋 3 と下ハウジング 1 3の接合端面 3 a、 1 3 aおよび当接リ ブ 3 b、 1 3 bはそれぞれ面対向に設けられている。 蓋 3 と下ハウジング 1 3 との熱板溶着は図 2 に示すように、 蓋 3の接 合端面 3 a と下ハウジング 1 3 の接合端面 1 3 aの間に加熱源の熱板 3 0を挟んでおいて双方の接合端面を溶融温度に加熱しておいて、 熱板 3 0を取り除き接合端面同士を加圧して液密に溶着させる。 このとき、 双 方の当接リ ブ 3 b、 1 3 bは接合端面 3 a、 1 3 aよ り一段低い位置で あるので溶融軟化温度には至らないので加圧されても変形はない。
従って、 当接リ ブ 3 b、 1 3 bが双方当接したところで境界部 1 4の 変形は止まるため、 ハウジング 1 1 の完成縦寸法が安定する。
また、 図 3 に示すように蓋 3 と下ハウジング 1 3 とが溶着されたとき には、 双方の空隙溝 3 c、 1 3 cによ り溜 り空間 2 2 が形成される。 こ のとき蓋 3 と下ハウジング 1 3の接合端面同士の加圧変形によ り発生す るバリ 2 1 を溜り空間 2 2 内に留めるこ とができる。 従って、 液流のあ る側に溜り空間 2 2 を形成することで、 バ リ 2 1 の飛出しによる流路面 積の狭隘化の防止と、 液流脈動によるバリ 2 1 の脱落を抑制し、 仮にバ リ 2 1 が脱落してもバリ 2 1 を溜り空間 2 2内に留め、 下流への流出を な く するので下流配管の詰ま り を防止することができる。
接合端面の周環に空隙溝 3 c、 1 3 cおよび当接リ ブ 3 b、 1 3 bを 設けるのが最良であるが、 該燃料供給装置の断面積が大き くな り、 装置 の小形化に反する。 そこで、 ノ リ 2 1 による支障の無い部分には、 当接 リ ブ 3 b、 1 3 bを熱溶着後の寸法が安定する程度の点在配置としても よい。 また、 バリ 2 1の離脱が燃料系に支障を及ぼす部分にのみ溜り空
■ 間 2 2 を形成して、 他の部分は従来例の溶着構造のままと してもよい。. 燃料ポンプ 5 の駆動による燃料液の送給動作は従来装置と同様であ り、 説明を省略する。
産業上の利用可能性 この発明は以上説明したよう に、 蓋 3の接合端面 3 aと下ハウジング 1 3 の接合端面 1 3 aに沿って接合端面 3 a、 1 3 aよ り一段低い位置 に当接リ ブ 3 b、 1 3 bを空隙溝 3 c、 1 3 c を介在して設けたので、 双方の接合端面を加熱して接合端面同士を加圧溶着させる際に当接リ ブ 3 b、 1 3 bが当接する位置で接合端面の変形が止ま りハウジング 1 1 の完成縦寸法が安定する。
—また、 流路側に溶着完了時に形成される空間 2 2 は加圧変形によ り発 生するバリ 2 1 を留め、 流路面積の狭隘化の防止と、 液流脈動によるバ リ 2 1 の脱落を抑制し、 脱落したバリ 2 1 を溜 り空間 2 2 内に留め、 下 流配管の詰ま り を防止する。

Claims

請求の範囲
1 . 燃料ポンプぉよびハウジングとともに一体に燃料夕 ンク内に沈設さ れ上記燃料ポンプから送給される燃料液の流路が上記ハウジング内に形 成される燃料供給装置において、
上記ハゥジングは合成樹脂からなる上ハウジングと下ハウジングの接合 端面を熱溶着によ り液密に形成され、 上記上ハウジングと下ハウジング はそれぞれ接合端面よ り一段低い互いに対向する当接リ ブを設け、 この 双方の当接リ ブが当接するよう に接合端面を溶融圧接して熱溶着したこ とを特徴とする燃料供給装置。.
2 . 接合端面に沿って空隙溝を介在させて当接リ ブを設け、 熱溶着完成 時に上記当接リ ブによ り閉鎖された空隙溝が溜り空間を形成し、 熱溶着 時に飛出すバリを上記溜り空間に残存させるよう にしたこ とを特徴とす る請求項 1記載の燃料供給装置。
3 . 少な く とも濾過エレメ ン トの下流にあたる流路部分に当接リ ブによ り形成される溜り空間を設けたこ とを特徴とする請求項 2記載の燃料供 給装置。
PCT/JP2000/005527 2000-08-18 2000-08-18 Fuel feed device WO2002016752A1 (en)

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US10/110,694 US6729308B1 (en) 2000-08-18 2000-08-18 Fuel feed device
DE2000626852 DE60026852T2 (de) 2000-08-18 2000-08-18 Brennstoffzufuhrsystem
EP20000953483 EP1310663B1 (en) 2000-08-18 2000-08-18 Fuel supply system
PCT/JP2000/005527 WO2002016752A1 (en) 2000-08-18 2000-08-18 Fuel feed device
TW89117346A TW467997B (en) 2000-08-18 2000-08-28 Fuel supply device

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US6729308B1 (en) 2004-05-04
CN1379844A (zh) 2002-11-13
DE60026852D1 (de) 2006-05-11
TW467997B (en) 2001-12-11
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EP1310663A4 (en) 2004-06-02
CN1215256C (zh) 2005-08-17

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