FR2712931A1 - Device for discharging fuel from a tank into the internal combustion engine of a motor vehicle. - Google Patents

Abstract

a) Device for discharging fuel from a tank into the internal combustion engine of a motor vehicle. b) Device characterized in that the delivery device (7) is inserted in a floating body (9) floating in the fuel, in which the fuel filter (11) connected to the suction nozzle is integrated in such a way that the fuel in the tank (1) can flow into the tank even with minimal filling.

Description

"Device for discharging fuel from a fuel

  in the internal combustion engine of a motor vehicle "State of the art: The invention relates to a device for repressing

  fuel from a tank in a combustion engine

  internal combustion of a motor vehicle with a device

  in the reservoir, constituted sensi-

  with a cylindrical shape, which has a suction nozzle connected to a fuel filter and

  a pressure connection which can be connected at least indi-

  directly to a fuel delivery line

to the internal combustion engine.

  In the case of such a device known by the

  DE-OS 3,509,309, a discharge device is disposed in a reservoir and delivers fuel from this reservoir to the internal combustion engine of a motor vehicle. For this, the device of repression

  of cylindrical shape, composed of an electric motor of

  trapping and a delivery pump, has an

  pressure stage connected to a discharge pipe

  going to the internal combustion engine and a suction nozzle

  ration leading into a fuel filter. The provision

  pressure is in this case fixed in a support which

  is connected to the tank wall.

  To reduce the noise or physical transmission of the discharge device's sound on the tank and

  this way to reduce the noise emission of all the

  motor vehicle the known delivery device is

  turned by a double-walled damping element, whose intermediate space is filled with gas to obtain a

  optimal damping of noise.

  This type of damper has some advantages in terms of its longevity compared with solutions with damping members of the rubber type, but there is however the disadvantage that the damping device provided in the document has a complicated and expensive construction to manufacture. In addition the discharge device present in the document on the articulation of the support on the tank housing or on the rigid fuel pipe between the device of

  discharge and the fuel connection on the fuel tank

  core a mechanically rigid connection between the device

  a source of noise and the

  see, so that the action of the known device

  of damping to isolate the noise can not suffice

fire to high demands.

  Advantages of the invention: The delivery device according to the invention

  characterized by the fact that the device

  is inserted into a body floating in the fuel,

  wherein the fuel filter connected to the fuel nozzle

  it is integrated in such a way that the fuel in the tank can flow into it

  even in case of minimal filling. The refueling

  In accordance with the invention, the advantage

  pressure does not have a rigid connection with the

  tank, so that the structural noise of the discharge device is not transmitted to the tank casing, resulting in damping

  high noise from all the discharge device.

  This is achieved in this case in a simple way to construct by inserting the discharge device into a floating body in the liquid fuel without a mechanically rigid connection, the fuel line between the discharge device and the tank connection being made in the form of an elastic hose. For in this

  case of an uncontrolled movement of the

  With the delivery device, the floating body can be guided on the reservoir, in this case at least indirectly and allows it to pivot about at least one axis. For this purpose, it is possible to fix an articulated guide lever on the floating body, which is otherwise

  that it can pivot on the regulator of a potentio-

  penetrating meter in the tank. This potentiometer is used in this case in a known manner to indicate the state of filling of the tank, but instead of its original additional floating body, there is the floating body which receives the delivery device, so that we can do without the additional floating body. But it is also possible to have a realization in which the

  floating body is guided with play in a socket

  connected to the reservoir, this potentiometer can also be advantageously integrated in this socket so that the tank or the tank lid

to be simplified.

  Another advantage with regard to a type of compact construction is obtained by integrating the filter of

  fuel in the floating body, which in this case is dis-

  in such a way that a safe flow of fuel to the discharge device is guaranteed even in the

  case of a minimum filling state.

  Through the use of independent construction

  of different tank variants, it is possible to

  to provide a standard discharge device with

  fuel connections and standard electrical connections

  dardized, whose adaptation to the respective requirements of construction and connection takes place only by means of the connections on the tank cover, so that

  only this one must be adapted to the conditions of

  on the motor vehicle. In order to avoid safety, even in the case of a tank completely filled or emptied and o in the case of a disposition of a body

  floating on the tank housing, a trans-

  noise mission by the backflow device on the

  reservoir, the floating body may be wrapped in a

  advantageously of a damping envelope, this damping part being formed of a single piece of rubber, which projects in particular on the suction nozzle.

  and the pressure connection on the floating body.

  Advantageous configurations and developments

  of the device for discharging fuel from a tank in the internal combustion engine of a motor vehicle according to the invention are obtained thanks to the fact that: - on a lid of the tank closing an opening of the

  tank, a connection nozzle is provided which

  binds the part of the fuel delivery line

  extending inside the tank to its part extends

  outside the tank and going to the combustion engine

  internal section, the part, arranged inside the tank, of the fuel discharge pipe consisting of an elastic pipe extending from the pressure connection on the delivery device, pipe of which

  the opposite end of the pressure device

  is connected to one end of the

  string penetrating the tank, - the length of the elastic pipe is chosen in such a way that it does not affect the body's adjusting movement

  floating from a very large upper position

  corresponding to a maximum filling of the tank up to

  a lower position as large as possible, cor-

  corresponding to a minimum filling of the tank,

  the guide element is constituted in the form of a le-

  guide, which is articulated at its end located

  the opposite of the floating body on a device

  setting, at least indirectly attached to the tank, penetrates

  in the tank, an electric path detector, the guide lever mechanically moving the path detector in this case at least indirectly depending on the filling of the reservoir,

  - the electrical signal that occurs as a result of the

  placement of the path detector caused by the guide lever is transmitted by means of an electrical connection

  a device indicating the status of the filling of the

  see, - the electrical path detector is constituted in the form of a potentiometer,

  - the delivery device consists of an electric motor

  drive train and a pressure pump

  dragged by turning by it, motor and pump that

  are arranged in a common casing of cylindrical shape

  that - the tank lid has an electrical connection

  and an inlet nozzle for a return pipe

  both of the internal combustion engine, - the floating body is substantially constituted by a radially projecting lug in which is provided a hole hingably receiving the guide element,

  - the hole in the leg is made in the form of a

  passage, in which a linkage axis is embedded.

  its guided in the guide lever, - the floating body consisting substantially with a cylindrical shape is arranged with play in a socket

  fixed by one of its front faces on the bottom of the

  serving, a sleeve which has on its lower end

  a plurality of passage bores in the peripheral wall facing towards the bottom of the tank; the sleeve has a lateral recess, preferably

  a longitudinal groove through which we do not

  the fuel delivery line and the

  electrical connections of the discharge device, - in the socket, there is provided a stop protruding radially inwards, stop which limits the stroke

  floating body in the direction away from the bottom of the

  the damper elements, preferably damping rubber parts being disposed on the abutment and at the end of the sleeve facing the bottom of the tank, the floating body is surrounded by a resilient damping piece, preferably a rubber piece protruding from the suction nozzle and fitting

  pressure of the delivery device.

  Drawings: The drawings show three embodiments of the fuel delivery device according to the invention and will be explained in more detail in the

description that will follow.

  - Figure 1 shows a schematic representation of a

  system for discharging fuel from a fuel tank

  see to the internal combustion engine of a motor vehicle.

  FIG. 2 shows a first exemplary embodiment

  lon a partial section through the reservoir, in the-

  the discharge device is disposed in a floating body, which is guided by means of a guide lever. FIG. 3 shows a second embodiment similar to that of FIG. 2, second example in FIG.

  which the floating body receiving the refueling device

  1 is guided in a socket, and FIG. 4 shows a third exemplary embodiment in which the floating body is inserted in a part.

made of rubber.

  Description of the exemplary embodiment:

  Figure 1 shows a fuel tank 1, which is connected by means of a delivery pipe of

  fuel 3 to an internal combustion engine 5 of a vehicle

  motor vehicle not shown. In the housing of the fuel tank 1 there is provided, as shown in FIG. 2, a delivery device 7 constituted in a form

  substantially cylindrical device in which are dis-

  poses a drive motor not shown

  in more detail and a pressure pump driven

  by the latter, and whose housing is inserted into a floating body 9 preferably having a cylindrical shape,

  floating on the liquid fuel. The floating body 9 realizes

  preferably made of plastic is in this case designed such that the delivery device which

  is guided in it floats with it on the surface of the car-

  fuellines. The delivery device 7 has a not shown suction nozzle, which is connected to a fuel filter 11, which is integrated in turn in the floating body 9, so that its inlet is at the lower end of the floating body 9 facing the bottom of the tank 1, so that the suction of the fuel in the discharge device 7 is guaranteed

  even when the filling state of tank 1 is minimal

wrong.

  At its upper end, the device

  7 comprises a pressure connection 13 which allows the outgoing fuel to pass to the discharge pressure and an electrical connection plug 15, which in turn is connected by means of electrical conduits inside the casing of the delivery device. 7

  in a known manner to the electric drive motor.

  On the pressure connection 13 is connected an elastic hose

  that part of the refueling line

  fuel hose 3, the length of which is designed such that it allows the floating body 9 to perform a setting movement from a position corresponding to a filling state of the maximum tank 1 up to a

  position corresponding to a filling state of the reservoir

  see 1 minimal and whose other end located opposite the discharge device 7 is connected to a connecting nozzle 19 disposed on the tank 1. This connection nozzle 19 of tubular form is in this case attached to a cover 21 sealingly closing an opening of

  tank 1, so that it is connected by its former

  tremité penetrating into the reservoir 1 to the elastic pipe 17 and its second end coming out of the tank 1 to the

  fuel delivery pipe 3. In addition, the

  tank loop 21 has an inlet nozzle 23 for

  a return line not shown in more detail,

  both the internal combustion engine 5 and a connection

  25, which is connected by means of electrical lines

  also elastic, 27 at the end of

  connection piece 15 of the discharge device 7. In order to prevent uncontrolled movement of the floating body 9 in the tank 1, a guide element constituted in the form of a guide lever 29 is fixedly hinged to a starting lug 31 radially floating body 9 by means of a connecting pin 33 passing through the bore, in such a way that the floating body 9 can move in a pivot plane lying perpendicularly

  to the connection axis 33 according to the filling state of the reservoir.

  see 1, the other end of the guide lever 29 being

  linked so as to be pivotable about at least one axis to

  a mechanical adjustment member 35 of an electromagnetic potentiometer

  trench disposed in the tank cover 31, penetrating

in the tank 1.

  The second embodiment shown at

  FIG. 3 differs from the exemplary embodiment

  presented in Figure 2 by the body guidance type

  floating in the tank 1. In this case, the body floats

  both 9 which has a substantially cylindrical shape is disposed

  at this point with play in a socket 43, which is

  linked by one of its front faces to the bottom 41 of the reservoir.

  see 1 in solidarity. The sleeve 43 has at its end facing the bottom of the tank 41 holes

  in its peripheral wall, through which the fuel

  rant which is in the tank 1, enters the sleeve 43, so that it establishes the same level of filling as in the tank 1. To pass the

  fuel delivery line 17 and the electrical lines

  The bushing 43 has a lateral recess in the form of a longitudinal groove 47 in its peripheral wall. In addition,

  has inside the sleeve 43, above the arrangement

  delivery device 7 a stop 49 protruding radially

  In this case, there is provided on the bottom 41 and on the stop 49 inside the bushing 43 shock absorbing rubbers 51 which are arranged in the direction of the tank lid 21. supposed to further cushion the body abutment

  9. To have a simple integration of the potential

  meter indicating the state of filling of the fuel in the sleeve 43, there is a potentiometer plate 53 on

  the delivery device 7, on which a

  sliding tact 55 protruding radially from the wall

inside the socket.

  In the case of the third exemplary embodiment shown in a simplified manner in FIG. 4, the floating body 9 receiving the delivery device 7 further inserted in a rubber damping part 61, which projects in the axial direction of the delivery device. 7 on its suction nozzle 63 and its pressure connection nozzle 13 and thus avoids even when the tank i is completely filled or completely emptied that the floating body 9 rests directly on the casing

  tank 1 and a noise transmission, which

  from the delivery device 7 to the tank 1.

  It is possible in this way with the fuel delivery system according to the invention without using

  parts subject to wear and in a way that is easy to

  to achieve a real lowering of the noise emission, the compact unit having the further advantage that one can adapt to different requirements with respect to

  the mounting conditions and the connection possibilities

  in a simple way by means of different variants

  tank cover, so that the

  flow can be standardized inside the tank

  for a multiplicity of construction requirements.

Claims (12)

R E V E N D I C A T I 0 N S   1) Device for discharging fuel at   firing a tank (1) in an internal combustion engine   (5) of a motor vehicle with a back-up device   ment (7) arranged in the reservoir, constituted substantially   with a cylindrical shape, which device has an   suction section connected to a fuel filter (11) and a pressure connection (13) connectable at least indirectly to a fuel delivery line   (3) to the internal combustion engine, which is   characterized in that the delivery device (7) is inserted into a floating body (9) in the fuel, in   the fuel filter (11) connected to the fuel nozzle   is integrated in such a way that the fuel is   in the tank (1) can flow into the   same in case of minimal filling.   2) Device according to claim 1, characterized   in that the floating body (9) is guided at least by   directly and can rotate around at least one axis in its position in the tank.   3) Device according to claim 1, characterized   in that on the floating body (9) is hingedly mounted to a guide member, the end of which is   the opposite of the floating body (9) is guided so as to   see rotating at least around a fixed axis relative to the tank (1).   4) Device according to claim 1, characterized   in that on a lid (21) of the tank closing an opening of the tank (1), there is provided a connection nozzle (19), which connects the portion of the fuel discharge pipe (3) extending to the inside the tank (1) at its part extending outside the tank   and going to the internal combustion engine, the part,   inside the tank, the pressure line   fuel consisting of an elastic hose (17) from the pressure connection (13) to the delivery device (7), the hose of which the end opposite the discharge device is connected to one end   the connection nozzle (19) entering the reservoir   see. Device according to claim 4, characterized in that the length of the elastic pipe (17) is chosen in such a way that it does not affect the movement of the   adjusting the floating body (9) from a sup-   very large corresponding to a maximum filling of the tank (1) to a lower position also   as large as possible, corresponding to a minimum wrong.   6) Device according to claim 1, characterized   in that the guide element is constituted in the form of a guide lever (29), which is articulated at its end situated opposite the floating body (9) on a   adjusting element, at least indirectly attached to the   see (1), penetrating the tank (1), of a detector   electrical path (37), the guide lever (29) moves   mechanically moving the path detector (37) in this case   at least indirectly depending on the filling of the see (1).   Device according to claim 6, characterized   in that the electrical signal produced by the displacement of the path sensor (37) caused by the guide lever (29) is transmitted by means of a   electrical connection to a device indicating the condition of the pleating of the tank.   8) Device according to claims 6 and 7,   characterized in that the electrical path detector   (37) is constituted in the form of a potentiometer.   Device according to claim 1, characterized   in that the delivery device (7) is formed   an electric drive motor and an electric pump   flow driven by it, motor and pump which are   arranged in a common box of cylindrical shape.    Device according to claim 4, characterized   characterized in that the tank lid (21) has an electrical connection (25) and an inlet nozzle (23) for   a return line from the internal combustion engine dull.   11) Device according to claim 3, characterized   characterized in that the floating body (9) consists of   substantially cylindrical with a leg (31)   radially projecting in which a hole is provided.   articulating the guide element (29).   12) Device according to claim 11, characterized   characterized in that the hole in the tab (31) is made   in the form of a passage bore, in which is   a connecting pin (33) guided in the guide lever age (29).   13) Device according to claim 2, characterized   characterized in that the floating body (9)   with a cylindrical shape is arranged with play   in a socket (43) fixed by one of its front faces   the on the bottom (41) of the tank (1), sleeve which presents   on its lower end facing the bottom of the tank   see (41) a multiplicity of passage bores (45) in its peripheral wall.   14) Device according to claim 13, characterized   characterized in that the sleeve (43) has a recess   lateral, preferably a longitudinal groove (47) through which the discharge pipe is passed   fuel (3) and the electrical lines of   rope of the delivery device (7).    Device according to claims 13 and   14, characterized in that in the sleeve (43), provision is made   a stop (49) protruding radially towards the interior   3s, stop which limits the stroke of the floating body (9) in the direction away from the bottom of the tank (41),   damping elements, preferably pieces of rubber   rubber dampers (51) being disposed on the stop (49) and at the end of the sleeve (43) facing the bottom of the tank.   16) Device according to claim 13, characterized   characterized in that a potentiometer is integrated in the socket (43), which consists of a potentiometer plate   (53) connected to the delivery device (7) and a   sliding tact (55) resting on the plate (53).   17) Device according to claim 1, characterized   characterized in that the floating body (9) is surrounded by an elastic damping piece, preferably a rubber piece (61) which projects from the suction nozzle   and the pressure connection of the delivery device (7).