FR2765627A1 - DEVICE FOR EXTRACTING AIR, IN PARTICULAR FOR INTERNAL COMBUSTION ENGINES - Google Patents

Abstract

Device (1) for sucking in air, in particular for supplying internal combustion engines. An air channel (4) has a shutter (flap) (5) actuated from the outside. The sealing of the device (1) and its assembly are simplified thanks to a housing (2) which surrounds the various components of the device (1). The device (1) can be advantageously manufactured by an inexpensive injection process to constitute an assembly module.

Description

I

State of the art.

  The present invention relates to a device for

  suck in air, in particular to supply engines with

  internal bustion, comprising an air channel with closure means actuated by an adjusting element or

  mechanical actuation passing through the wall of the air channel.

  In particular in diesel engines with injection

  direct control requires good behavior control

  fluidics. It is desirable to have a round flow-

  billonnaire causing the turbulent entrainment of the fuel on its arrival in the combustion chamber. At speeds of

  high rotation, the dynamics of existing gases from the air as-

  pirated through the suction channel is generally sufficient to have sufficient turbulence of the fuel. But especially in the range of low rotational speeds, we were led to connect an additional suction channel

  by an additional adjustment flap.

  The complete suction channel adjustment flap

  According to the general state of the art, the mental is provided with an axis of rotation passing through the wall of the suction channel so that the action on the flap takes place outside the air channel. Such a device with an adjustment flap consists of several parts which are mounted separately and the passage of the parts through the walls of the channel must also be made

airtight.

  This results in the implementation of manufacturing means and it must also be taken into account that for each cylinder of the internal combustion engine it is necessary

such an adjustment device.

Advantages of the invention.

  The present invention aims to remedy these drawbacks and proposes to create a device whose manufacture, sealing and mounting are improved by

  compared to the device of the prior art.

  To this end, the invention relates to a device of the type described above, characterized in that a housing

  surrounds the air channel and the mechanical adjustment element.

  According to other advantageous features of the invention: * several air channels and several actuating elements

  are provided in a housing for actuating the means of fer-

  meture. * at least one drive unit placed inside the

  housing for actuating at least one shutter means.

  * the sealing means is constituted by a pivoting shutter

  the axis of rotation of which passes through the wall of the air channel.

  has a lever and an actuating rod are provided for

turn the shutter.

  * the shutter, the axis of rotation and / or the lever

  are made in one piece.

  * the drive means is an electromagnet in the form of a rotating or sliding magnet and / or a means

pneumatic drive.

  * the drive unit is also surrounded by injection

of plastic.

  * a flat seal provided on the inlet side and / or on the outlet side, depending on the direction of the suction air flow

  to seal the case.

  * a flat seal on the inlet side and / or on the outlet side

tie in the air channel.

  * the flat seal, which seals the housing, on the side of its inlet or on the side of its outlet, as well as the seal ensuring the seal of the air channel, are made in one

single piece.

  * at least one bronze bearing is provided.

  * stiffening ribs are provided inside

of the housing.

  * all plastic parts are injected

  one behind the other using the multi-injection method

multiple.

  The invention also relates to a motor with com-

  internal bustion, in particular direct injection diesel engine,

  comprising the device according to the invention.

  The invention also relates to a motor vehicle

  mobile comprising the device according to the invention.

  Thus, a device for sucking air, according to the invention, is characterized by a housing surrounding the channel

  air and mechanical adjustment or actuation elements.

  The entire device thus constitutes, to a certain extent, a box which can be assembled as a complete unit. This box also contributes to the complementary sealing of the device. Thanks to this additional sealing of the

  sealing requirements, at the level of the

  management of mechanical actuation elements, such as for example

  the axis of rotation through the wall of the canal, are considered

  reduced, this is why at this place the means to

  implement are much weaker.

  This is how both the air channel and the

  closing means, with mechanical actuating elements

  that can advantageously be produced by injection.

  This allows advantageous manufacture of the outer casing.

  As already indicated, in the case of an internal combustion engine with several cylinders, such an air channel is required for each cylinder with a closure means and

  actuating or adjusting elements.

  According to an advantageous development of the invention, the housing is made so that all the air channels are housed in a common housing with the closure means and the actuating elements. This simplifies the assembly all the more because for all the cylinders it suffices to mount a single device between the cylinder head and the suction unit. The number of sealing points required

  sealing the mounting of the motor is thus considerable-

ment reduced.

  Advantageously, at least one drive unit is provided for actuating the means for closing the air channel in the housing. By integrating unity

  drive (actuator or motor) in the housing on

  shore to a compact box which, next to the openings for the cylinder head or for the suction unit, simply has another passage for the control or actuation of the drive unit. The number of sealing points of such a switch flap housing is thus reduced to a minimum.

three sealing points.

  The shutter device is preferably made

  rence in the form of a rotating flap whose axis of rotation

  tion crosses the wall of the air channel. Thus, this flap can be actuated from outside the air channel as

  in existing systems. The axis of rotation pre-

  provides a lever and an actuating rod which are connected to a drive unit. The complete mechanism, including the drive unit, is housed, as indicated above, inside the housing which surrounds the assembly; thus, as before, the device according to the invention constitutes a global module which is manufactured and installed from

simple way.

  Preferably, the adjustment or actuation elements, in particular the flap and / or the lever, are produced in one piece by injection. This part can be injected directly into the air channel, according to the techniques

modern injection systems.

  The drive unit for actuating the shutter unit may for example be constituted by a rotating or translational magnet. We can also consider other types of drive units or actuator such as a pneumatic cylinder. In one case, it is necessary to provide a passage in the box according to the invention for the power lines; in other cases it is necessary to plan a passage

  for pneumatic driving or a push button of a pneumatic cylinder

  matic. According to another advantageous embodiment,

  also injects one or more plastic

  drive tees inside the housing. In connection with the manufacture of the various components mentioned above, by injection, it is also advantageous to inject the

  housing. So, at the end of this manufacturing process, tech-

  only advantageous, we have the complete module

  fit to provide three seals and mount the assembly on the engine. According to an advantageous embodiment, there is a surface seal which seals the housing, the

  inlet side and / or outlet side, for aspirated air

  re. As already indicated, such a joint, for example in a elastic-

  tomère, provides a remarkable seal, and allows a

quick and easy assembly.

  Advantageously, at least one seal is also provided on the air channel. This seal seals the air channel injected into the device on the tube to be connected during assembly. There is thus a very good guarantee of a good airtight closure of the device according to the invention. On the one hand, the air channel (s) are sealed directly, and, on the other hand, as indicated above, an additional seal is provided on the casing which envelops, which makes possible non-critical leaks. by the passages made in the canal

  of air for crossing the axis of rotation.

  Preferably, a single over-joint is provided.

  face which plays the two sealing functions, namely

  the tightness of the housing and that of the various air channels.

  This further simplifies the mounting of the device according to the invention. For a good reliability of the device of the invention it is advantageous that the moving parts are mounted in bronze bearings and that these bearings are

  preferably integrated into injection manufacturing.

  In a pneumatic drive device it

  just pass a pusher through the wall of the box

tier and seal.

  For good rigid torsional and elongation reliability, the device is preferably reinforced according to

  the invention. The reinforcing ribs provided for this purpose

  fet, and which are also performed by injection during

  manufacturing, provide great rigidity with respect to

  formations and twists and especially those caused by

the vibrations of a diesel engine.

Example of realization.

  An exemplary embodiment of the invention is shown

  shown in the drawings and will be described below using

  the only attached figure which is a sectional view of an arrangement

  sitive according to the invention, partially shown.

  The device 1 according to the figure comprises a box

  tier 2 whose periphery is provided with a groove 3 for

  have an elastomer seal (not shown).

  An air channel 4 is formed in the housing 2; this channel closes with a shutter 5. The shutter 5 is provided with a rotation axis 6 (member

  actuation) rotatably mounted in the wall 7 and which travels

  pours the wall 7 into its underside 8. The drawing shows

  two bronze bearings 9, 10, in the form of sleeves.

  A lever 11 is formed on the axis of rotation 6, on the lower side 8 of the air channel 4; this lever cooperates in an articulated manner with an actuating rod 12. The

  connecting rod 12 is itself hingedly attached to a gar-

niture 13 of a permanent magnet 14.

  The permanent magnet 14 is rotatably mounted in a rotation bearing 15. For this, one side 16 of the axis of rotation 15 is coated with a piece of synthetic material 17, injected, fixed in the housing 2. On the lower side there is provided a return spring 18 mounted in a fixing 19 injected with the plastic part 17; this spring is also fixed to the axis of rotation 15. The spring of

  reminder 18 of the embodiment shown is a res-

twist spell.

  An electromagnetic coil 20 is also

  injection-molded with the plastic part 17, in the vicinity of the permanent magnet 14. A flat connector 21 is provided for the electrical connection of the electromagnet 20.

  Device 1 is only shown partially-

  is lying; it extends to the right in the single figure. Following the stiffening ribs 22, there are other

  air channels, not drawn, corresponding to the other cylinders

  dres. The link 12 also continues; it is hingedly connected to other levers 11 corresponding to other shutter 5 of the other air channels 4. Next to the air channel 4 with the flap

  shutter 5, another air channel 23 is provided without vo-

  shutter let 5. Around the two air channels 4, 23, there is a housing 24 partly in the form of a groove for a seal ensuring the sealing of the air channels 4, 23, on the connection side. The device 1 according to the invention results in a housing which is mounted as a switching module between the cylinder head and the suction device of the internal combustion engine. For this, the device 1 is sealed by corresponding flat seals, vis-à-vis the cylinder head or a corresponding system of tubes leading to the cylinder head; on the other side, the seal is made vis-à-vis the suction module. This flat seal is placed in the groove 3 or

  in the housing 24 and is blocked there.

  As another sealing means there is only the passage of the electrical connection for the electromagnet 22. The return spring 18 is preferably mounted so that the flap 5 is in the open position. The actuating rod 12 thus also opens the neighboring flap 5, not shown. This switching position gives a large suction section so that at low rotational speeds this generates a vortex flow

  necessary to spray the fuel sufficiently.

  As soon as the rotation speed reaches the range

  corresponding rotational speed in which the dyna-

  gas flow gas flow through the section

  the air channel 23 is sufficient, the electro-

  magnet 20 is supplied with current. Therefore, the magnet per-

  handle 14 rotates and drives the connecting rod 12. This leads all the flaps 5 to the closed position as shown in

the figure.

  When the speed of rotation decreases and passes

  below a predetermined value, the power supply

  sheet is cut so that the return spring 18

  shovel the electromagnet 14 into its exit position.

  The driving of the actuating rod 12 also causes the flaps 5 to open. The device 1, finished, can be manufactured by injection in stages. Non-plastic parts are introduced into their respective shapes and receive injection. In particular the flap 5, with its axis of rotation 6 and the lever 11, can be injected globally into the air channel 4. As the entire device 1 is surrounded

  by the housing 2, the tightness of the passage of the axis of rotation

  tion 6 through the wall 7 of the air channel 4, is not cri-

  tick as indicated. The whole device 1

  forms a housing which can be mounted as a complete module on the

  respective in that the device 1 is fixed between the motor

  suction cup and cylinder head or suction tubing

attached to the cylinder head.

NOMENCLATURE

  1. device 2. housing 3. groove 4. air channel 5. shutter 6. axis of rotation (actuating member) 7. wall 8. lower face 9. bronze bearing 10. bronze bearing 11 lever 12. actuating rod 13. packing 14. permanent magnet 15. axis of rotation 16. side 17. plastic part 18. return spring 19. fixing 20. electromagnet 21. flat connector 22. ribs reinforcement 23. air channel 24. housing

Claims (12)

R E V E N D I C A T IONS   1) Device (1) for sucking in air, in particular for air   lie of internal combustion engines, comprising a channel   air (4) with a shutter means (5) actuated by an element   mechanical adjustment or actuation ment (6) passing through the wall (7) of the air channel (4), characterized by a housing (2) surrounding the air channel (4) and the element mechanical adjustment (6).   2) Device according to claim 1, characterized in that several air channels (4) and several elements   actuator (6) are provided in a housing (2) for ac- the closing means (5).   3) Device according to any one of claims 1   and 2, characterized by at least one drive unit (20, 12) placed inside the housing (2) for actuating at least one means shutter (5).   4) Device according to any one of the pre- claims   cédentes, characterized in that the closure means is constituted by a pivoting flap (5) whose axis of rotation (6) passes through the wall (7) of the channel air (4).   3O) Device according to claim 4, characterized by a lever (11) and an actuating rod (12) for turning the flap (5).   6) Device according to claim 5, characterized in that It   the shutter (5), the axis of rotation (6) and / or the   sink (11) are made in one piece.   ) Device according to any one of the pre- claims   , characterized in that the drive means is an electromagnet (20) in the form of a rotating or sliding magnet and / or a means pneumatic drive.   8) Device according to any one of the pre- claims cédentes, characterized in that   the drive unit (20) is also surrounded by injec- tion of plastic.   9) Device according to any one of the pre- claims   cédentes, characterized by a flat seal provided on the inlet side and / or on the outlet side, depending on the direction of flow of the suction air   to seal the housing (2).    ) Device according to any one of the claims   previous, characterized by a flat seal on the inlet side and / or the outlet side in the air channel (4).   11) Device according to claims 9 and 10, characterized in that   the flat seal, which seals the housing (2), the side   tee of its inlet or outlet side, as well as the seal ensuring the air channel seal (4), are made in one piece.   12) Device according to any one of claims previous, characterized by   at least one bronze bearing (9, 10).   13) Device according to any one of claims   previous, characterized by stiffening ribs (22) provided inside the housing (2).   14) Method of manufacturing a device according to one which   conch of the preceding claims,   characterized in that all the plastic parts are injected   one behind the other according to the multi-injection process ples.    ) Internal combustion engine, in particular direct injection diesel engine, characterized in that   it comprises a device according to any one of the claims previous cations.   16) Motor vehicle characterized in that   it comprises a device (1) according to one of claims previous.