JP6512914B2 - Retaining member of regulator in fuel supply system - Google Patents

Description

  The present invention is a holding member of a regulator in a fuel supply system having a reservoir which is disposed in the middle of a fuel supply pipe connecting a fuel tank and an engine and is used to supply the fuel stored in the fuel tank to the engine. It is about

  Conventionally, when supplying liquid fuel stored in a fuel tank to an engine, it is necessary to supply the fuel without interruption even if there is rapid acceleration or rapid deceleration, and a fuel supply device provided with a reservoir is used. There is.

  As the fuel supply device, for example, one disclosed in JP-A-2008-297941 is known, and the fuel supply device is a fuel storage tank formed in a housing main body forming a fuel storage tank which also serves as a reservoir. A fuel pump for supplying stored fuel from a fuel discharge pipe to an engine, a float having an adjusting function for keeping the liquid level of fuel stored in a fuel storage tank at a predetermined position, and a regulator incorporating an adjusting pressure member The fuel storage formed in the housing main body in a state where the pressure control port formed at the upper end of the main body is connected to the fuel discharge pipe and the return port formed below the regulator main body is communicated with the fuel storage tank A fuel supply apparatus comprising a regulator for regulating the pressure of fuel supplied to the engine from the fuel pump disposed in a tank It is known.

  In particular, the regulator used in the fuel supply system disclosed in the above publication is configured to allow excess fuel discharged from the return port to flow down onto the surface of the stored fuel, as with the regulators used in many other fuel supply systems. It is.

  Therefore, the liquid level of the stored fuel may be disturbed by the flow of the surplus fuel, and the liquid level of the stored fuel may not be determined by swinging the float, which may prevent stable and stable supply from the fuel pump to the engine. In addition, the fuel storage tank also has the effect of depositing and removing the water and impurities contained in the fuel, but the water and impurities deposited at the bottom by the flow of surplus fuel from the regulator are mixed again and supplied to the engine There is also the problem of

JP 2008-297941 A

  According to the present invention, in the fuel supply apparatus disposed in the middle of the fuel supply pipe for supplying the liquid fuel stored in the conventional fuel tank to the engine, surplus from the regulator to the fuel stored in the fuel storage tank It is an object of the present invention to prevent harmful effects caused by the flow of fuel and enable the engine to be supplied with fuel in a stable state without mixing of impurities.

  The present invention, which has been made to solve the above problems, has a lid that covers an opening formed on the upper surface of a housing main body forming a fuel storage tank that doubles as a reservoir, and the fuel storage tank formed in the housing main body. A fuel pump for supplying the stored fuel to the engine from a fuel discharge pipe disposed on the lid, a float having an adjusting function for keeping the liquid level of the fuel stored in the fuel storage tank at a predetermined position, and adjusting The fuel storage tank is connected to the fuel discharge pipe connected to a pressure control port continuously connected to the upper side of the pressure control unit main body in which the pressure member is installed, and the return port for discharging excess fuel connected to the lower part of the pressure control unit main body A regulator disposed within the housing body in communication with the fuel pressure control valve for regulating the fuel pressure in the fuel discharge pipe supplied from the fuel pump to the engine A holding member of a regulator in a fuel supply apparatus, wherein a leg portion mountable on a support plate respectively provided in a protruding manner on the mutually opposing inner wall surfaces of the fuel storage tank protrudes on the lower surface of both ends and is arched Of the holding member main body having a length such that at least one end approaches the inner wall surface of the fuel storage tank, the holding flange protrudingly provided on the peripheral wall of the pressure control unit main body of the regulator Forming a receiving surface on the upper end face and forming a space between the return port of the regulator and the regulator receiving portion formed of a recess, and the regulator receiving portion is formed on the surface of the holding member main body A hook-like surplus fuel discharge passage is formed which is in communication with the space of the regulator receiving portion by being hooked on an end portion approaching the inner wall surface of the fuel storage tank from the portion; Characterized in that the excess fuel from the regulator to enable back to fuel stored in the fuel reservoir along the inner wall surface of the fuel reservoir from the tip of the excess fuel discharge passage.

  Further, in the present invention, the surplus fuel from the regulator is returned from the tip of the surplus fuel discharge path to the fuel stored in the fuel storage tank along the inner wall surface on the side of attaching the hinge of the float in the fuel storage tank. By doing so, the influence of surplus fuel on the float can be minimized.

  Furthermore, in the present invention, a ball for a stopper, which is inserted into a locking recess formed in the base end of the communication passage in the tip end surface, in accordance with the position of the communication passage to the atmosphere formed in the lid in the holding member main body. A support shaft of a predetermined height having a receiving surface is erected, and when the housing is overturned, a stopper ball disposed on the receiving surface blocks the communication path to the atmosphere to thereby form a fuel storage tank. It is possible to prevent the outflow of the fuel stored in the

  According to the present invention, it is possible to eliminate the increase and decrease in the amount of stored liquid caused by the disturbance of the liquid level caused by the excess fuel from the regulator flowing down to the fuel stored in the fuel storage tank, and to maintain the engine in a stable state by the fuel pump. It can supply fuel. In addition, it is possible to prevent the re-mixing of the impurities accumulated in the fuel storage tank, which are caused by the surplus fuel from the regulator flowing down to the fuel stored in the fuel storage tank.

The perspective view which shows the preferable embodiment of the fuel supply apparatus using the holding member of the regulator which concerns on this invention. The perspective view in the state where the lid of an embodiment shown in Drawing 1 was removed. The perspective view of the regulator used for the fuel supply system shown in FIG. 1, and the holding member of the regulator which is this invention. FIG. 2 is a cross-sectional view of the lower part of the lid in the embodiment shown in FIG. 1; FIG. 5 is a cross-sectional view of FIG. 4 with the holding member and the regulator removed. FIG. 2 is a longitudinal sectional view of the embodiment shown in FIG. The longitudinal cross-sectional view of the communication path vicinity to the air | atmosphere formed in the cover body in the Example shown in FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  The drawings show a preferred embodiment of the present invention, and the fuel supply device has a lid 2 which airtightly covers the opening 13 of the housing main body 11 in which the fuel storage tank 12 is formed inside with a bottom with an open upper surface. The fuel stored in the housing 1 and the fuel storage tank 12 disposed in the housing main body 11 are introduced from the suction port 31 through the filter 7 and the fuel discharge formed on the lid 2 of the housing main body 11 A fuel pump 3 for discharging from a pipe 21 and a fuel pipe (not shown) detachably and integrally attached to one wall surface 14 of the housing body 11 and connected to a fuel tank (not shown) The connector 5 has a supply port 52 for supplying the fuel into the fuel storage tank 12 of the housing body 11.

  The fuel pump 3 is disposed with the electrode portion 32 formed at the upper end thereof protruding from the lid 2 to enable electrical connection outside the housing 1.

  Further, the connector 5 is removably attached to the outer wall surface 14 of the housing main body 11 by a set screw 51, and an intake port disposed above the liquid surface of the fuel stored in the fuel storage tank 12 at least. Fuel is supplied from 15 to the fuel storage tank 12.

  Furthermore, a float 8 having an adjusting mechanism for determining the level position of the fuel stored in the fuel storage tank 12 is disposed in the fuel storage tank 12, and the float 8 is the fuel storage tank on the inner wall surface of the lid 2. It is pivotally attached by a hinge 81 disposed at the upper position of the 12 inner wall surfaces 121.

  Furthermore, in the fuel storage tank 12, a pressure control port 42 is continuously provided above the pressure control unit main body 41 in which a pressure control member (not shown) is installed, and a return port 43 below the pressure control unit main body 41. And a regulator 4 having the pressure regulating port 42 connected to the fuel discharge pipe 21 formed on the lid 2 of the housing main body 11 and disposed above the float 8 in the fuel storage tank 12 It is held by the holding member 9.

  More specifically, as shown in FIG. 3, the holding member 9 for holding the regulator 4 used in the present embodiment is provided so as to project on the mutually opposing inner wall surfaces 121 and 122 of the fuel storage tank 12. Legs 91 and 92 which can be placed on the support plates 123 and 124 disposed on the lower surfaces of both ends are arch-shaped, and at least one end 93 approaches the inner wall surface 121 of the fuel storage tank 12 A holding member main body 94 having a length is provided, and a holding flange 44 protrudingly provided on a peripheral wall of the pressure control unit main body 41 of the regulator 4 is mounted on a part of the surface of the holding member main body 94 A regulator receiving portion 96 is formed, which is a recess having a surface 95 formed on the upper end surface and a space (not shown) between the surface 95 and the return port 43 of the regulator 4 and holding the space In the holding member main body 94, a hook-like excess fuel draining on an end portion 93 approaching the inner wall surface 121 of the fuel storage tank 12 from the regulator receiving portion 96 and communicating with the space of the regulator receiving portion 96 A passage 97 is formed.

  In the present embodiment having the above configuration, the lid 2 is assembled to the housing main body 11 by being fixed to the housing main body 11 by the plate-like spring clip 10, and the engine, the vehicle body, etc. The fuel from the fuel tank (not shown) is fueled via the connector 5 attached to the wall surface 14 of the housing main body 11 by the set screw 51, as described above. The fuel is introduced into the storage tank 12 and introduced into the fuel storage tank 12 through the fuel passage (not shown) disposed inside the lid 2 and the valve 17 and stored to a predetermined liquid level by the float 8 at the same time The fuel pump 3 is operated to discharge the fuel in the fuel storage tank 12 from the fuel discharge pipe 21.

  Then, when the fluid pressure in the fuel supply pipe 2 is higher than a predetermined value, the regulator 4 is operated to cause the surplus fuel to flow out to the return port 43 from the pressure adjustment port 42 connected to the fuel supply pipe 2 and store the fuel. Although fuel of a predetermined pressure is supplied to the engine by being returned into the tank 12, in the present embodiment, since the regulator 4 is held by the novel holding member 9, fuel conventionally stored is stored. The liquid does not flow directly to the liquid level of the liquid and does not disturb the liquid level.

  That is, in the present embodiment, the surplus fuel flowing out from the return port 43 of the regulator 4 does not directly fall on the liquid surface of the fuel stored in the fuel storage tank 12 as in the prior art. Since the fuel is stored along the inner wall surface 121 of the fuel storage tank 12 from the end 93 through the excess fuel drainage path 97 from 96 to the inner wall surface 121 of the fuel storage tank 12, no disturbance of the liquid level due to the surplus fuel flowing down from the regulator 4 occurs. Instability of the fuel supply from the fuel pump 3 due to surface disturbance does not occur. In addition, in the present embodiment, since the surplus fuel is made to flow along the inner wall surface 121 on the hinge 81 side having little influence on the swing of the float 8, the float 8 is less likely to swing and a more stable supply is possible. is there.

  Further, in the present embodiment, since the entire holding member 9 has an arched shape, it is robust against load resistance, and the holding member 9 is provided protruding from the peripheral wall of the pressure control portion main body 41 of the regulator 4 Since the receiving surface 95 on which the flange 44 is mounted is provided, the regulator 4 can be reliably held.

  Furthermore, in the present embodiment, as shown in FIG. 7, the support shaft 99 having a predetermined height stands on the holding member main body 91 at the communication passage position 22 to the atmosphere formed in the lid 2 as shown in FIG. A receiving surface 98 of a stopper ball 24 which is provided and is inserted into a locking recess 23 formed at the base end of the communication path 22 is formed on the tip end surface.

  Therefore, when the housing 1 is in the overturned state, the stopper ball 24 disposed on the receiving surface 98 blocks the communication path 22 to the atmosphere to prevent the outflow of the fuel stored in the fuel storage tank 12. Can.

  Reference Signs List 1 housing, 2 lid, 3 fuel pump, 4 regulator, 5 connector, 7 filter, 8 float, 9 holding member, 10 spring clip, 11 housing body, 12 fuel reservoir, 13 opening, 14 wall, 15 fuel intake Mouth, 17 valve body, 18 mounting portion, 21 fuel discharge pipe, 22 (to the atmosphere) communication passage, 23 locking recess, 24 ball, 31 suction port, 32 electrode portion, 33 discharge port, 41 pressure regulator main body, 42 pressure regulation port, 43 return port, 44 holding flange, 51 set screw, 52 supply port, 81 hinge, 91 leg, 92 leg, 93 end, 94 holding member main body, 95 receiving surface, 96 regulator receiving portion , 97 surplus fuel discharge channel, 98 receiving surface, 99 support shaft, 121, 122 inner wall surface, 123, 124 support plate

Claims (3)

A cover is provided to cover the opening formed in the upper surface of the housing main body forming the fuel storage tank which doubles as a reservoir, and the fuel stored in the fuel storage tank formed in the housing main body is disposed on the lid A fuel pump for supplying the engine from the fuel discharge pipe, a float having an adjustment function for keeping the liquid level of the fuel stored in the fuel storage tank at a predetermined position, and an upper portion of the pressure control unit main body incorporating the pressure control member. The pressure adjustment port connected to the fuel discharge pipe is connected to the fuel discharge pipe, and the return port discharging the excess fuel connected to the lower part of the pressure adjustment unit main body is communicated with the fuel storage tank in the housing main body A regulator in a fuel supply system comprising a regulator arranged to regulate the fuel pressure in the fuel discharge pipe supplied from the fuel pump to the engine A support member,
Legs which can be placed on support plates respectively provided on the inner walls facing each other of the fuel storage tank are arched on the lower surfaces of both ends, and the whole is arch-shaped, and at least one end is the fuel storage tank An upper end face is formed with a receiving surface on which a holding flange projected on a peripheral wall of the pressure regulator main body of the regulator is formed on a part of the surface of the holding member main body having a length approaching the inner wall. A regulator receiving portion formed of a concave portion holding a space with the return port of the fuel cell, and approaching the inner wall surface of the fuel storage tank from the regulator receiving portion to the surface of the holding member main body; The surplus fuel exhaust passage in the form of a bowl is formed to be connected to the space of the regulator receiving portion, and the surplus fuel from the regulator flows from the tip of the surplus fuel drainage passage. Regulators of the holding member in the fuel supply apparatus being characterized in that a possible back along the inner wall surface of serial fuel reservoir to the fuel stored in the fuel storage tank.   The inner wall surface of the fuel storage tank to which the surplus fuel is returned and returned is the inner wall surface on the hinge side supporting the float, and the surplus fuel flowed out from the regulator is from the tip of the surplus fuel drainage path The holding member of the regulator in the fuel supply system according to claim 1, wherein the fuel is returned to the fuel stored in the fuel storage tank along the inner wall surface on the hinge side of the float.   The holding member main body has a stopper ball receiving surface which is inserted into a locking recess formed at the base end of the communication passage according to the position of the communication passage to the atmosphere formed in the lid in the tip end surface. A support shaft having a height is provided upright, and when the housing is in a state of rollover, a stopper ball disposed on the receiving surface blocks the communication path to the atmosphere to store the fuel stored in the fuel storage tank. The holding member of the regulator in the fuel supply system according to claim 1 or 2, characterized in that the outflow is prevented.

Images