WO2000006934A1 - Tuyauterie d'alimentation en fluide - Google Patents
Tuyauterie d'alimentation en fluide Download PDFInfo
- Publication number
- WO2000006934A1 WO2000006934A1 PCT/JP1999/004082 JP9904082W WO0006934A1 WO 2000006934 A1 WO2000006934 A1 WO 2000006934A1 JP 9904082 W JP9904082 W JP 9904082W WO 0006934 A1 WO0006934 A1 WO 0006934A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- supply pipe
- fuel supply
- fuel
- resin
- layer
- Prior art date
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
- F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
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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
- 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
- F02M37/0017—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor related to fuel pipes or their connections, e.g. joints or sealings
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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
- 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
- F02M37/0047—Layout or arrangement of systems for feeding fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
- Y10T428/1393—Multilayer [continuous layer]
Definitions
- the present invention relates to a fluid supply pipe for supplying a fluid such as a liquid and a gas.
- the present invention relates to a fluid supply pipe capable of suppressing the charge amount of the fluid when the fluid passes through the fluid supply pipe to an appropriate range.
- FIG. 8 shows a schematic configuration diagram of such a conventional fuel supply device.
- the fuel supply device shown in FIG. 8 is of a type that drives and controls the fuel pump so that the pressure of the fuel supplied to the fuel injection valve matches the target pressure.
- an internal combustion engine (engine) 10 is connected to an intake pipe 20 and an exhaust pipe 30 and is provided with an intake valve 13 and an exhaust valve 14.
- the air filtered by the air cleaner 21 is supplied to the intake pipe 20 with the flow rate adjusted by the throttle valve 22, and the fuel is supplied from the fuel injection valve 40.
- the mixture of air and fuel mixed in the intake pipe 20 is supplied to the cylinder chamber of each cylinder via the intake valve 13. Further, the combustion gas in the cylinder chamber is discharged to the exhaust pipe 30 via the exhaust valve 14.
- the fuel in the fuel tank 41 is sent out by a fuel pump 42 (often configured as a pump module integrated with the fuel tank) provided in the fuel tank 41.
- the fuel delivered by the fuel pump 42 is supplied to the fuel injection valve 40 of each cylinder via a fuel supply pipe 73 and a delivery pipe 45.
- the fuel supply pipe 73 is used to connect the fixed fuel supply pipe 73 b fixed to the vehicle body and the fixed fuel supply pipe 73 b to the fuel pump 42 and the delivery pipe 45.
- Fuel supply pipes 73a and 73c As the fixed fuel supply pipe 73b, a metal fuel supply pipe made of a conductive material such as stainless steel is used.
- the fixed fuel supply pipe 73b is usually fixed to the vehicle body or the like via an insulating elastic material such as plastic in order to protect the vehicle body from vibration and the like.
- Rubber fuel supply pipes are used as the connection fuel supply pipes 73a and 73c.
- the connecting fuel supply pipe 73a By using the connecting fuel supply pipe 73a, the work of attaching and detaching the fuel pump 42 becomes easy. Further, by using a rubber fuel supply pipe as the connection fuel supply pipes 73a and 73c, vibration of the vehicle body engine 10 can be absorbed.
- the control unit (ECU) 60 is a fuel pressure sensor that detects the pressure of fuel, an intake pressure sensor that detects the pressure of intake air, an intake temperature sensor that detects the temperature of intake air, and a water temperature sensor that detects the temperature of cooling water.
- Various controls are performed based on a detection signal from an opening amount sensor for detecting the opening amount of the throttle valve. For example, control of the opening degree of the throttle valve 22 for adjusting the intake air amount, control of opening and closing of the fuel injection valve 40 for supplying fuel into the cylinder chamber, and control of the fuel port for matching the fuel pressure to the target pressure
- the drive control of the amplifier 42 is performed.
- connection fuel supply pipes 73a and 73b are used as the connection fuel supply pipes 73a and 73b, there will be deterioration over time, and maintenance work such as replacement is required. For this reason, it is considered that a resin fuel supply pipe, which is easy to mold and requires no maintenance work, is used instead of the rubber fuel supply pipe.
- the fuel and the fuel supply pipe rub against each other, and the friction at this time charges the fuel and the fuel supply pipe.
- the amount of charge generated by the charging due to this friction is large when a resin fuel supply pipe is used.
- the charge on the fuel supply pipe can be discharged, for example, by connecting a ground wire to the fuel supply pipe.
- it is difficult to discharge the charge on the fuel Therefore, for example, when the fuel charged when passing through the connection fuel supply pipe 73 a shown in FIG. 8 passes through the metal fixed fuel supply pipe 73 b, the fixed fuel supply pipe 73 b Is inductively charged.
- the electric charge inductively charged in the fixed fuel supply pipe 73b is discharged via the vehicle body or the worker.
- the fixed fuel supply pipe 7 3 b has a small volume resistivity, the electric charge may be rapidly discharged and a spark discharge may occur. There is. If spark discharge occurs in the fixed fuel supply pipe 73b, the fixed fuel supply pipe 73b may be deteriorated. It also interferes with the work of the workers. .
- An object of the present invention is to suppress the charge amount of a fluid when the fluid passes through the fluid supply pipe within an appropriate range.
- Another object of the present invention is to suppress the charge amount of the fluid when the fluid passes through the fluid supply pipe to an appropriate range, and to appropriately reduce the discharge energy when the charge accumulated in the fluid supply pipe is discharged. It is to keep in the range.
- the volume resistivity of the fluid supply pipe 1 0 1 1 ohm - it is set below cm.
- the volume resistivity of the fluid supply pipe in the range of 1 0 7 to 1 0 1 1 ohm 'cm.
- the fluid supply pipe has at least two layers, the most set the volume resistivity of the inner layer to the range of 1 0 7 to 1 0 1 1 ohm ⁇ cm, the outermost the volume resistivity of the layer is set to more than 1 0 1 2 ohm ⁇ cm.
- the fuel supply pipe is formed of a resin.
- FIG. 1 is a view showing an arrangement of a fuel supply device using a fluid supply pipe according to a first embodiment of the present invention.
- FIG. 2 is a configuration diagram of a fuel supply device using a fluid supply pipe according to the first embodiment of the present invention.
- FIG. 3 is a diagram showing the relationship between the volume resistivity of the fuel supply pipe, discharge energy, and charging potential.
- FIG. 4 is a diagram showing a resin fluid supply pipe having a single-layer structure.
- FIG. 5 is a view showing a resin fluid supply pipe having a two-layer structure.
- FIG. 6 is a diagram showing the charged potentials of a single-layer resin fuel supply pipe and a two-layer resin fuel supply pipe.
- FIG. 7 is a diagram showing charge densities of a single-layer resin fuel supply pipe and a two-layer resin fuel supply pipe.
- FIG. 8 is a configuration diagram of a fuel supply device using a conventional fluid supply pipe.
- FIGS. 1 and 2 are views showing an example of a fuel supply device using a fluid supply pipe according to a first embodiment of the present invention.
- Fig. 1 shows the arrangement of the fuel supply device
- Fig. 2 shows the configuration of the fuel supply device.
- the fuel supply device shown in FIGS. 1 and 2 is of a type that drives and controls the fuel pump so that the pressure of the fuel supplied to the fuel injection valve matches the target pressure.
- the internal combustion engine (fuel engine) 10 is installed in front of the vehicle body 1 (in the engine room), and the fuel tank 41 is installed behind the vehicle body 1 (below the rear seat, etc.).
- a fuel pump 42 for delivering fuel is provided in the fuel tank 41.
- a fuel supply pipe 43 for supplying the fuel delivered by the fuel pump 42 to the fuel injection valve 40 via the delivery pipe 45, that is, the internal combustion engine 10 is provided.
- the fuel pump 42 has a variable speed motor, and the discharge pressure of the fuel is adjusted by driving and controlling the variable speed motor.
- the fuel The fuel pump 42 is integrated with the fuel tank and configured as a pump module.
- An intake pipe 20 and an exhaust pipe 30 are connected to the internal combustion engine 10, and an intake valve 13 and an exhaust valve 14 are provided in a cylinder chamber 11 of each cylinder.
- a piston 12 is provided in the cylinder chamber 11 of each cylinder.
- the air filtered by the air cleaner 21 is supplied to the intake pipe 20 with the flow rate adjusted by the throttle valve 22 and the fuel is supplied from the fuel injection valve 40.
- the mixture of air and fuel mixed in the intake pipe 20 is supplied to the cylinder chamber 11 of each cylinder via the intake valve 13.
- the combustion gas in the cylinder chamber 11 is exhausted to an exhaust pipe 30 via an exhaust valve 14.
- the opening of the throttle valve 22 is adjusted by driving means such as motor 23.
- a fuel pressure sensor 50 that detects fuel pressure
- an intake pressure sensor 51 that detects intake air pressure
- an intake air temperature sensor 52 that detects intake air temperature
- a water temperature sensor that detects cooling water temperature 53.
- An opening amount sensor for detecting the opening amount of the throttle valve 22 is provided.
- the control device (ECU) 60 performs various controls based on detection signals from a fuel pressure sensor 50, an intake pressure sensor 51, an intake temperature sensor 52, a water temperature sensor 53, an opening amount sensor, and the like. For example, the opening degree of the throttle valve 22 is controlled to adjust the intake air amount, the fuel injection valve 40 is opened and closed to supply fuel into the cylinder chamber 11, and the fuel pressure is controlled. Control the fuel pump 42 to adjust to the target pressure.
- the fuel supply pipe 43 has a fixed fuel supply pipe 43b and connecting fuel supply pipes 43a and 43c.
- the fixed fuel supply pipe 4 3 b is fixed to the vehicle body 1.
- the connected fuel supply pipes 43a and 43c connect the fixed fuel supply pipe 43b to the fuel pump 42 and the delivery pipe 45, respectively.
- the fixed fuel supply pipe 43b and the connecting fuel supply pipes 43a and 43c are connected by piping connectors 44a and 44b, respectively.
- a metal fuel supply pipe made of a conductive material such as stainless steel is used as the fixed fuel supply pipe 43b.
- the length of the fixed fuel supply pipe 43b varies depending on the size of the vehicle, but is usually about 2 to 4 m.
- Fixed fuel supply pipe 4 3b In order to protect the vehicle body from vibration and the like, it is fixed to the vehicle body 1 via an insulating elastic body such as plastic.
- connecting fuel supply pipes 43a and 43c resin fuel supply pipes made of nylon are used.
- the length of the connecting fuel supply pipes 43a, 43c is usually about 20 to 30cm.
- the connecting fuel supply pipe 43a on the fuel pump 42 side the fuel pump 42 can be removed without removing the entire fuel supply pipe 43. This facilitates the work of attaching and detaching the fuel pump 42.
- a resin fuel supply pipe as the connection fuel supply pipe 43 a on the fuel pump 42 side and the connection fuel supply pipe 43 c on the delivery pipe 45 side, vibration of the engine 10 and the body 1 is connected. It can be absorbed by the fuel supply pipes 43a and 43c. As a result, damage to the connection fuel supply pipes 43a and 43c can be prevented.
- the connecting fuel supply pipes 43a and 43c are not limited to resin fuel supply pipes made of nylon, but may be resin fuel supply pipes made of a hard resin such as fluororesin or flexible metal.
- a fuel supply pipe or the like may be used.
- a rubber fuel supply pipe can also be used as the connection fuel supply pipes 43a and 43c.
- rubber fuel supply pipes are used as the connection fuel supply pipes 4 3a and 4 3c, when the fuel pump 42 is driven to increase the fuel pressure, the connection fuel supply pipes 4 3a , 43 c is easy to expand. This causes a response delay when adjusting the fuel pressure.
- resin fuel supply pipes are used as the connection fuel supply pipes 43a and 43c, expansion is difficult even when the fuel pressure is high. Therefore, the response delay when adjusting the fuel pressure can be reduced. Further, the resin fuel supply pipe can be easily formed into various shapes.
- the fuel and the fuel supply pipe rub against each other, and the friction at this time charges the fuel and the fuel supply pipe.
- a resin fuel supply pipe is used as the fuel supply pipe, the fuel is positively charged and the resin fuel supply pipe is negatively charged.
- FIG. 3 shows the relationship between the volume resistivity of the fuel supply pipe, the discharge energy, and the charge potential (charge amount).
- the discharge energy is shown by a solid line
- the charging potential is indicated by a broken line.
- the discharge energy is energy when discharging in a state where a predetermined amount of charge is accumulated in the fuel supply pipe.
- the charging potential is a potential generated by charging the fuel and the fuel supply pipe when the fuel passes through the inside of the fuel supply pipe.
- the charge potential can be said to be the amount of charge (charge amount) charged on the fuel and the fuel supply pipe.
- the smaller the volume resistivity of the fuel supply pipe the greater the discharge energy when the charge stored in the fuel supply pipe is discharged.
- discharge energy does not change significantly.
- the larger the volume resistivity of the fuel supply pipe the larger the charging potential generated by charging the fuel and the fuel supply pipe when the fuel passes through the fuel supply pipe (the larger the charge amount).
- the volume resistivity at approximately 1 0 9 ohm ⁇ cm or less, the charge potential can be seen that the following Figures 3 not change significantly.
- the volume resistivity of the fuel supply pipe When the volume resistivity of the fuel supply pipe is small, the charging potential generated by charging the fuel and the fuel supply pipe when the fuel passes through the fuel supply pipe is low (the charge amount is small). However, the charge stored in the fuel supply pipe is rapidly discharged due to the large discharge energy. Therefore, spark discharge may occur from the fuel supply pipe. If a spark discharge occurs in the fuel supply pipe, the fuel supply pipe may deteriorate.
- the volume resistivity of the fuel supply pipe When the volume resistivity of the fuel supply pipe is large, the charge stored in the fuel supply pipe does not suddenly discharge because the discharge energy is small. However, the charged potential generated by charging the fuel and the fuel supply pipe when the fuel passes through the fuel supply pipe is high (the charge amount is large). Therefore, when the fuel that has passed through the fuel supply pipe passes through a metal fuel supply pipe or the like, the amount of charge that is induced and charged in the metal fuel supply pipe by the charge of the charged fuel increases. Since the volume resistivity of the metal fuel supply pipe is small, the discharge energy when the electric charge accumulated in the metal fuel supply pipe is discharged is large. For this reason, spark discharge may occur between the metal fuel supply pipe and the vehicle body or workers. If a spark discharge occurs in the metal fuel supply pipe, the metal fuel supply pipe may deteriorate or impede the work of workers.
- the fuel supply pipe is provided by providing a mechanism for discharging the charged charges in the fuel supply pipe. It is possible to prevent electric charge from accumulating in the fuel supply pipe, thereby preventing a spark discharge from being generated in the fuel supply pipe. However, it is difficult to discharge the electric charge of the fuel when the fuel passes through the fuel supply pipe without generating spark discharge in, for example, a metal fuel supply pipe arranged on the downstream side.
- the metallic fuel supply pipe is inductively charged when the charged fuel passes through the metallic fuel supply pipe. It is necessary to reduce the amount of charge. That is, it is necessary to reduce the amount of charge on the fuel when the fuel passes through the inside of the fuel supply pipe arranged upstream of the metal fuel supply pipe. To do so, the volume resistivity of the fuel supply pipe is set to a value that reduces the amount of charge on the fuel when the fuel passes through the fuel supply pipe, and the fuel cell is arranged downstream by the charge of the charged fuel. It is sufficient to prevent a spark discharge from being generated when the electric charge inductively charged in the metal fuel supply pipe is discharged through the vehicle body or the worker.
- a conductive member made of metal or the like is attached to the outer periphery of the fuel supply pipe, and an earth wire is provided between the conductive member and the vehicle body or the like.
- the fuel supply pipe is formed of a conductive resin, and an earth wire is connected between the fuel supply pipe and the vehicle body.
- Such a method of preventing the accumulation of electric charge in the fuel supply pipe requires a work of attaching a conductive member to the outer periphery of the fuel supply pipe and a work of connecting a ground wire, which increases costs. . Therefore, it is desirable to eliminate such work.
- the electric charge accumulated in the fuel supply pipe must be reduced. It is only necessary to prevent the electric charge from suddenly discharging at the time of discharge so that spark discharge is unlikely to occur in the fuel supply pipe. In other words, the volume resistivity of the fuel supply pipe is set to a value when the charge stored in the fuel supply pipe is discharged.
- the discharge energy when the charge accumulated in the fuel supply pipe to discharge spark discharge Can be suppressed to such an extent that the occurrence of occurrence can be suppressed.
- the amount of charge of the fuel and the fuel supply pipe when the fuel passes through the fuel supply pipe can be reduced. This makes it possible to reduce the amount of charge induced by charging the charged fuel to the metal fuel supply pipe and the like arranged downstream, and the metal fuel supply pipe and the like and the vehicle body and workers It is possible to prevent the occurrence of spark discharge between them.
- the volume resistivity of the fuel supply pipe to the 1 0 7 to 1 0 1 in the range of 1 ohm ⁇ cm for example resin or rubber having a volume resistivity in the range of 1 0 7 to 1 0 1 1 ohm ⁇ cm This forms a fuel supply pipe.
- the connected fuel supply pipe if the have the volume resistivity is less than 1 0 1 1 ohm ⁇ cm in the range of 1 0 7 to 1 0 1 1 ohm ⁇ cm, resin or rubber or the like of various A fuel supply pipe for the material can be used.
- the fuel supply pipe having a single-layer (monolayer) structure has been described.
- a fuel supply pipe having a multilayer (multi-layer) structure may be used.
- the fuel supply pipe of the multilayer structure for example, the volume resistivity is suitable when it is nearly 1 0 7 to 1 0 1 1 ohm ⁇ cm is formed by easily resin permeated fuel.
- the volume resistivity suppresses approximately 1 0 7 to 1 0 1 less more charge quantity of fuel and the fuel supply pipe to be 1 is ohm ⁇ cm which is the fuel provided a resin layer made of permeated easily resin, volume Although the resistivity is approximately 1 0 6 ohm ⁇ cm or less or 1 0 1 2 ohm ⁇ cm or more fuel permeates the fuel supply pipe by providing a resin layer where the fuel consists of permeated difficulty have resin (barrier layer) To prevent leakage.
- a second embodiment of the present invention will be described.
- FIG. 6 shows the results of measuring the charging potential of the resin fuel supply pipe and the charge density (charge amount) of the fuel passing through the resin fuel supply pipe when fuel was supplied to the resin fuel supply pipe having the above structure. See Figure 7. As shown in Fig.
- a single-layer resin fuel supply pipe composed of an insulating resin layer made of nylon (hereinafter referred to as "nylon layer”) was used.
- the multi-layer resin fuel supply pipe is composed of a conductive resin layer whose inner layer is made of conductive Teflon (hereinafter referred to as "conductive Teflon layer").
- conductive Teflon layer A two-layer structure in which the outer layer was composed of a nylon layer was used.
- the charge potential of the resin fuel supply pipe is lower in the resin fuel supply pipe having a multilayer structure in which the inner layer is a conductive Teflon layer.
- the charge density of the fuel passing through the resin fuel supply pipe is higher in the resin fuel supply pipe having a multilayer structure in which the inner layer is a conductive Teflon layer.
- the volume resistivity of Teflon is, for example, 10 16 ohm ⁇ cm.
- the charge potential (charge amount) when the fuel passes through the multi-layer resin fuel supply pipe with the inner layer being a conductive Teflon layer is reduced to a single-layer resin fuel. It is larger than when fuel passes through the supply pipe.
- the electric charge charged in the conductive Teflon layer tries to move to the outer nylon layer and the inner fuel, but the amount of the transfer to the fuel is large, and the amount of the transfer to the nylon layer is small. Therefore, compared to a single-layer resin fuel supply pipe, the multi-layer resin fuel supply pipe with the conductive inner layer made of conductive Teflon has a higher charge density of the fuel and a higher charge of the resin fuel supply pipe. The potential decreases.
- the charge density of the fuel after the fuel passes through the resin fuel supply pipe increases.
- the amount of charge inducedly charged in the downstream member increases.
- the present embodiment provides a fuel supply pipe having a multilayer structure capable of suppressing the charge amount of the fuel to an appropriate range. Further, the present embodiment provides a multi-layer fuel supply pipe capable of suppressing the charging potential of the fuel supply pipe and preventing the generation of creeping discharge on the surface of the fuel supply pipe.
- a two-layer resin fuel supply pipe consisting of an inner layer and an outer layer is used as the connection fuel supply pipes 43a and 43c shown in Figs. Will be described.
- the volume resistivity of the inner layer of the resin layer substantially 1 0 7 to 1 0 1 in the range of 1 ohm ⁇ cm.
- the volume resistivity of the inner layer of the resin layer substantially 1 0 7 to 1 0 1 1 ohm ⁇ cm has the effect described above.
- the volume resistivity of approximately 1 0 1 - With less arm ⁇ cm, for example the charge amount of the inner layer of the resin layer and the fuel when the plastic fuel supply pipe 4 3 in a passing fuel shown in FIG. 2 Can be kept low. This makes it difficult for spark discharge to occur even if the metal fixed fuel supply pipe 43b disposed downstream is inductively charged by the charge of the charged fuel.
- volume resistivity of 1 0 7 ohm ⁇ cm or more by setting the volume resistivity of 1 0 7 ohm ⁇ cm or more, creeping discharge on the surface of the resin layer of the outer layer can be prevented from occurring.
- the volume resistivity of the inner layer of the resin layer is less than 1 0 6 ohm ⁇ cm, the cause personal creeping discharge occurs on the outer peripheral surface of the resin layer of the outer layer.
- the volume resistivity of the outer resin layer is set to be about 110 2 ohm ⁇ cm or more.
- the volume resistivity of the outer resin layer is set to be about 110 2 ohm ⁇ cm or more.
- the outer resin layer does not come into direct contact with the fuel, there is no need to consider the charging potential (charge amount) due to friction between the outer resin layer and the fuel, and only the discharge energy.
- a resin that easily permeates the fuel is used as the resin that forms the inner resin layer
- a resin that does not easily penetrate the fuel is used as the resin that forms the outer resin layer.
- the outer resin layer acts as a barrier layer, the fuel does not leak from the resin fuel supply pipe even if the inner resin layer is formed of a resin through which fuel easily penetrates.
- the most volume resistivity of the inner layer was approximately 1 0 7 to 1 0 1 1 ohm ⁇ cm, most volume resistivity of the outer layer substantially 1 0 1 2 Ohm 'cm or more.
- the intermediate layer between the innermost layer and the outermost layer can be formed of various volume resistivity resins.
- the intermediate layer can be formed of a resin that does not easily penetrate the fuel.
- the intermediate layer can be formed of a resin selected from various resins.
- Such a three-layer or more resin fuel supply pipe also has the same operational effects as the two-layer resin fuel supply pipe described above.
- each layer is formed of resin, but each layer may be formed of a material other than resin, for example, rubber.
- a material other than resin for example, rubber.
- the volume resistivity of the innermost layer was formed by rubber 1 0 7 to 1 0 1 1 ohm ⁇ cm, which is the response delay in adjusting the pressure of the fuel occurs, a decrease in charge quantity of the fuel It is effective in preventing the generation of sparks when electric charges stored in the fuel supply pipe are discharged.
- the outermost layer volume resistivity formed by rubber 1 0 1 2 ohm cm although the function as a barrier layer weaker than in the case of forming a resin, the reduction and the fuel supply pipe of the charge amount of the fuel It is effective in preventing sparking when the accumulated charge is discharged.
- the fuel supply pipe 43 is connected to the fixed fuel supply pipe 43 b made of metal and the connecting fuel made of resin.
- the supply pipes are configured by the supply pipes 43a and 43c, the fuel supply pipe may be configured by only the fuel supply pipe made of resin. In this case, by volume resistivity used 1 0 1 ohm ⁇ cm or less of a resin fuel supply pipe, to suppress the charge quantity of the fuel when the fuel passes through the plastic fuel supply pipe to the proper range Can be.
- connection fuel supply pipes 43a and 43c connected to the fuel pump side and the internal combustion engine side of the fixed fuel supply pipe 43b were formed of resin, but the charge induced by the fixed fuel supply pipe 43b was not charged. If the purpose is to reduce the amount, only the connecting fuel supply pipe 43a may be formed of resin. In this case, to set the volume resistance rate of the connecting fuel supply pipe 4 3 a 1 0 1 1 ohm 'cm or less or 1 0 7 to 1 0 1 1 ohm ⁇ cm. In this case, the amount of charge induced and charged in the fixed fuel supply pipe 43b by the charge of the fuel charged in the resin fuel supply pipe 43a decreases, and the amount of charge from the fixed fuel supply pipe 43b decreases. The generation of spark discharge can be suppressed.
- Connecting the fuel supply pipe 4 3 a, 4 3 c has a volume resistivity of 1 0 1 1 ohm ⁇ cm or less Ah Rui 1 0 7 to 1 0 1 1 ohm 'cm material other than resin as long as it is within the range of, For example, it can be formed by rubber.
- the fluid supply tube of the present invention is used as a fuel supply tube for a fuel supply device for various types of internal combustion engines. be able to.
- the fluid supply pipe of the present invention can be used as a fuel supply pipe of a fuel supply device of various combustion engines other than the internal combustion engine.
- the fluid supply pipe of the present invention can be used as a fluid supply pipe of a fluid supply device that supplies various liquids and gases other than fuel.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99933162A EP1101995B1 (en) | 1998-07-29 | 1999-07-28 | Fluid supply pipe |
DE69937151T DE69937151T2 (de) | 1998-07-29 | 1999-07-28 | Fluidversorgungsleitung |
US09/744,240 US6575199B1 (en) | 1998-07-29 | 1999-07-28 | Fluid supply pipe |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21437098 | 1998-07-29 | ||
JP10/214370 | 1998-07-29 | ||
JP4718899 | 1999-02-24 | ||
JP11/47188 | 1999-02-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000006934A1 true WO2000006934A1 (fr) | 2000-02-10 |
Family
ID=26387346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/004082 WO2000006934A1 (fr) | 1998-07-29 | 1999-07-28 | Tuyauterie d'alimentation en fluide |
Country Status (4)
Country | Link |
---|---|
US (1) | US6575199B1 (ja) |
EP (1) | EP1101995B1 (ja) |
DE (1) | DE69937151T2 (ja) |
WO (1) | WO2000006934A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005052350A1 (ja) * | 2003-11-28 | 2005-06-09 | Sanoh Kogyo Kabushiki Kaisha | 燃料チューブおよび車輌燃料配管のアース構造 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3788780B2 (ja) * | 2002-11-19 | 2006-06-21 | 本田技研工業株式会社 | 車両用キャニスタの配置構造 |
US7185682B2 (en) * | 2004-12-22 | 2007-03-06 | Visteon Global Technologies, Inc. | Fuel flange assembly for a vehicle fuel system |
DE102007024782B4 (de) * | 2007-05-26 | 2011-08-25 | Eichenauer Heizelemente GmbH & Co. KG, 76870 | Heizeinsatz und dessen Verwendung in einem Harnstoffversorgungssystem |
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US5524673A (en) * | 1992-04-14 | 1996-06-11 | Itt Corporation | Multi-layer tubing having electrostatic dissipation for handling hydrocarbon fluids |
US6321795B1 (en) * | 1992-04-14 | 2001-11-27 | Itt Industries, Inc. | Multi-layer fuel and vapor tube |
US5743304A (en) * | 1992-04-14 | 1998-04-28 | Itt Corporation | Multi-layer fuel and vapor tube |
US5865218A (en) * | 1992-04-14 | 1999-02-02 | Itt Corporation | Multi-layer fuel and vapor tube |
US5284184A (en) * | 1992-04-14 | 1994-02-08 | Itt Corporation | Corrugated multi-layer tubing having at least one fluoroplastic layer |
US5469892A (en) * | 1992-04-14 | 1995-11-28 | Itt Automotive, Inc. | Corrugated polymeric tubing having at least three layers with at least two respective layers composed of polymeric materials dissimilar to one another |
US6089277A (en) * | 1992-08-07 | 2000-07-18 | Tokai Rubber Industries, Ltd. | Fuel transporting hose having inner layer made of fluorine-contained resin |
JP3161661B2 (ja) * | 1993-01-08 | 2001-04-25 | 東海ゴム工業株式会社 | 積層構造ホースの製造方法 |
US6180197B1 (en) * | 1998-02-13 | 2001-01-30 | Itt Manufacturing Enterprises, Inc. | Multi-layer tubing having at least one intermediate layer formed from a polyamide/polyketone alloy |
US6257281B1 (en) * | 1998-02-13 | 2001-07-10 | Itt Manufacturing Enterprises, Inc. | Multi-layer tubing having at least one intermediate layer formed from a polyamide alloy |
US6279615B1 (en) * | 1999-09-03 | 2001-08-28 | Tokai Rubber Industries, Ltd. | Fuel hose |
-
1999
- 1999-07-28 DE DE69937151T patent/DE69937151T2/de not_active Expired - Fee Related
- 1999-07-28 WO PCT/JP1999/004082 patent/WO2000006934A1/ja active IP Right Grant
- 1999-07-28 EP EP99933162A patent/EP1101995B1/en not_active Expired - Lifetime
- 1999-07-28 US US09/744,240 patent/US6575199B1/en not_active Expired - Fee Related
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US4631415A (en) | 1983-09-30 | 1986-12-23 | Kurt Sauerwein | Radiation treatment apparatus |
US4881937A (en) | 1986-07-10 | 1989-11-21 | Eric van't Hooft | Method of treating a part of the body with radioactive material and a trolley for use therein |
JPH04248089A (ja) * | 1990-08-09 | 1992-09-03 | Ems Inventa Ag | 帯電防止性で、耐冷衝撃性及び耐過酸化物性の自動車用燃料パイプ |
US5851172A (en) | 1995-05-08 | 1998-12-22 | Omnitron International, Inc. | Afterloader with active force feedback |
JPH1113574A (ja) * | 1997-06-23 | 1999-01-19 | Honda Motor Co Ltd | 燃料用配管構造 |
JPH11118073A (ja) * | 1997-10-16 | 1999-04-30 | Toyoda Gosei Co Ltd | 燃料ホース |
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Cited By (1)
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WO2005052350A1 (ja) * | 2003-11-28 | 2005-06-09 | Sanoh Kogyo Kabushiki Kaisha | 燃料チューブおよび車輌燃料配管のアース構造 |
Also Published As
Publication number | Publication date |
---|---|
DE69937151D1 (de) | 2007-10-31 |
DE69937151T2 (de) | 2008-06-19 |
EP1101995A4 (en) | 2004-02-25 |
EP1101995B1 (en) | 2007-09-19 |
US6575199B1 (en) | 2003-06-10 |
EP1101995A1 (en) | 2001-05-23 |
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