EP3445966A1

EP3445966A1 - Ejector device and combination of a cylinder head cover and ejector device

Info

Publication number: EP3445966A1
Application number: EP17719824.9A
Authority: EP
Inventors: Stefan Herter; Martin JÄGER; Armin Ehni; Stefan Dwenger; Yvonne Serve
Original assignee: ElringKlinger AG
Current assignee: ElringKlinger AG
Priority date: 2016-04-19
Filing date: 2017-04-18
Publication date: 2019-02-27
Anticipated expiration: 2037-04-18
Also published as: WO2017182436A1; DE102016206615A1; EP3445966B1

Abstract

The invention relates to an ejector device which has a simple design, is economical to produce and is easy to construct. According to the invention, the injector device comprises: a suction chamber for suctioning a suction medium; a mixing channel for mixing a propulsion medium with the suction medium; a propulsion nozzle device for generating a propulsion medium beam directed in a beam direction out from the suction chamber and into the mixing channel.

Description

Ejector device and combination of a cylinder head cover and an ejector device

The present invention relates to an ejector device. An ejector device may in particular be a jet pump for generating a negative pressure and for sucking or sucking off a suction medium.

Ejectors are known for example from WO 2011/095790 AI or the

WO 2013/017832 AI known.

The present invention has for its object to provide an ejector, which is simple in construction, inexpensive to produce and can be mounted with little effort.

This object is achieved by an ejector device according to claim 1.

The ejector device according to the invention comprises a main body which comprises:

a suction chamber for sucking a suction medium;

a mixing channel for mixing a propellant with the suction medium; a motive nozzle device for generating a motive medium jet directed out of the suction chamber along a jet direction and into the mixing channel.

The ejector device according to the invention is in particular a jet pump for generating a negative pressure.

By means of the ejector device according to the invention, in particular a negative pressure for sucking and / or sucking off a suction medium can be generated. - -

Hereinafter, the suction and / or suction functions are referred to simply as "suction".

The ejector device can be used in particular for sucking oil mist-containing gas.

The ejector device is then in particular part of an oil separation device, which is used in particular in a vehicle with an internal combustion engine.

The main body of the ejector device preferably comprises a suction chamber element surrounding the suction chamber.

In particular, the suction chamber is formed as an inner space of the Saugkammerelements or formed by the interior of the Saugkammerelements.

The suction chamber element preferably comprises a substantially torus-shaped interior.

The suction chamber is preferably substantially torus-shaped.

It may be provided that the base body comprises a mixing channel element as an alternative or in addition to the suction chamber element.

The mixing channel element preferably surrounds the mixing channel.

In particular, the mixing channel is formed by an interior of the mixing channel element or formed as an interior of the mixing channel element.

It may be favorable if the suction chamber element and the mixing channel element are different components from each other. - -

The suction chamber element and the mixing channel element are preferably different from each other and interconnected according to the respective individual production components, in particular plastic injection molded components.

Both the suction chamber element and the mixing channel element are preferably each produced in one piece in a single production step as a plastic injection-molded component.

The suction chamber element and the mixing channel element are preferably connected to one another in a flange region. In particular, it can be provided that the suction chamber element and the mixing channel element are connected to each other by means of a welded connection, a screw connection, a clamping connection and / or a latching connection.

Preferably, the Saugkammerelement and the mixing channel element in the flange are connected to each other gas-tight.

The suction chamber element and the mixing channel element are preferably connected to one another in such a way that the suction chamber and the mixing channel adjoin one another directly and are connected to one another in a fluid-efficient manner.

It can be provided that the mixing channel, in particular a mixing channel element of the basic body, comprises the following:

a tapered portion which adjoins the suction chamber along the jet direction and which has an inner cross-sectional area continuously and / or continuously decreasing along the jet direction, and / or a widening portion which adjoins the tapered portion along the jet direction; which has a continuous and / or continuously increasing inner cross-sectional area along the beam direction. - -

The tapered portion preferably connects directly to the suction chamber.

The flared portion may immediately follow the tapered portion.

Alternatively, however, it can also be provided that an intermediate section is provided between the tapering section and the widening section, which section has an inner cross-sectional area which is unchanged along the beam direction.

An internal cross-sectional area is, in particular, a flow-through area in a plane taken perpendicular to the beam direction.

More specifically, the mixing passage includes a convergent portion formed by the tapered portion and a divergent portion formed by the expanding portion.

Preferably, a Lavall nozzle is formed by means of the mixing channel.

The mixing channel element is in particular a Lavalldüsenelement.

It can be provided that a suction chamber element of the main body comprises one or more or all of the following components:

an enclosure for the suction chamber;

a suction port connection;

a blowing medium port;

a motive nozzle element receptacle;

a Treibmediumkanal for fluidly effective connection of the Treibmediumanschlusses with the Treibdüsenelementaufnahme;

a flange portion for connecting the suction chamber member to a mixing channel element of the base body different therefrom; - - One or more locking elements of a translational locking device of a fastening device for fastening the base body to a suction channel;

one or more locking elements of a rotary locking device of a fastening device for fastening the base body to a suction channel;

a positioning device for positioning the Saugkammerelements relative to a translational locking device and / or relative to a rotary locking device.

The suction chamber preferably surrounds the motive nozzle element receptacle, a motive nozzle element arranged therein and / or a motive medium channel substantially annularly, in particular torus-shaped or annular segment-shaped, in particular torus section-shaped.

In one embodiment of the invention it can be provided that a mixing channel element of the main body comprises one or more or all of the following components:

an enclosure for the mixing channel;

a discharge port;

a flange portion for connecting the mixing channel member to a suction chamber member of the base body different therefrom;

one or more locking elements of a translational locking device of a fastening device for fastening the base body to a suction channel;

a positioning device for positioning the mixing channel element relative to a translational locking device and / or relative to a rotary locking device. - -

A positioning device is in particular a combination of one or more projections and / or one or more recesses for restricting the movement of the base body relative to the suction channel.

In particular, a positioning device can serve to fix the base body, for example the suction chamber element and / or the mixing channel element, in one or two or three spatial directions or degrees of freedom of movement in order to enable and / or supplement complete fixation in all degrees of freedom by means of the locking device.

A mixing channel element of the main body may in particular comprise one or more stiffening ribs.

Preferably, a stiffening rib or a plurality of stiffening ribs is part of a positioning device.

In particular, one or more projections of the positioning device may be utilized to prevent undesirable twisting, tilting, displacement, etc. of the mixing channel member by maintaining one or more stiffening ribs of the mixing channel member in a desired position by means of the one or more protrusions.

It may be favorable if a suction chamber element of the base body is a unitary component for receiving driving nozzle elements of different type and / or size.

The suction chamber element of the base body may also be a unitary component for connection to mixing channel elements of different type and / or size.

A unit component is in particular a universal common part, which is suitable for a multiplicity of application possibilities, in particular for the production of - -

Ejektorvorrichtungen different dimensions and / or operating parameters, is used.

A motive nozzle element of a motive nozzle device is preferably integrated in the suction chamber element.

For example, it can be provided that a motive nozzle element of the

Treibdüsenvorrichtung is passed through the suction chamber.

The suction chamber element preferably serves as a base element for the entire ejector device, on which all functional components relevant to the operating characteristics are determined.

Preferably, the Saugkammerelement also provides a connection option for the supply of the drive medium and / or a connection option for the suction medium.

By using a suction chamber element designed as a unitary component, a cost-effective standard component can be manufactured in higher quantities, in particular while minimizing set-up times and set-up costs of the production tool.

A suction chamber element and / or a mixing channel element of the base body are preferably designed as plastic injection-molded components and preferably have a main demolding, which is substantially parallel to the jet direction.

In one embodiment of the invention, it may be provided that the ejector device comprises a fastening device for fastening the main body of the ejector device to a suction channel.

The fastening device preferably comprises a translatory locking device for avoiding a translational movement of the base body - - relative to the suction channel, in particular in a direction parallel to a central axis of a connecting piece of the suction channel extending direction.

The central axis is in particular transversely, for example substantially perpendicular, aligned with the beam direction. The main body then has in particular an angled configuration.

However, it can also be provided that the center axis and the beam direction are aligned substantially parallel to each other.

The supplied propellant is then deflected in particular within the Saugkammerelements.

The connecting piece of the suction channel is in particular an end region of the suction channel, on which the ejector device is directly fixed or can be fixed.

In particular, a direct, direct and / or contacting connection can be produced between a suction channel connection of a suction chamber element of the base body and the connection piece of the suction channel in order to fix the main body of the ejector device to the suction channel.

Alternatively or in addition to a translational locking device, the fastening device may comprise a rotary locking device. Such a rotary locking device is used in particular to prevent rotation of the base body relative to the suction channel.

In particular, a rotation of the main body of the ejector device about a central axis of a connecting piece of the suction channel can be avoided by means of the rotary locking device.

It may be favorable if the ejector device has a fastening device for fastening the main body of the ejector device to a - -

Suction channel comprises, wherein the fastening device is a translative

Locking device and a rotary locking device comprises.

The translational locking device and the rotary locking device are preferably

a) different from each other,

b) spatially separated,

c) functionally separated from each other,

d) independently operable and / or

e) can be actuated in chronological succession.

By "mutually different locking devices" is to be understood in particular that the translational locking device and the rotary locking device are formed by mutually different components or component sections.

By "spatially separated locking devices" is to be understood in particular that the translational locking device and the rotary locking device act on mutually different spatial regions and / or sections of the Ejektorvorrichtung to effect the translational locking or the rotary locking.

By "functionally separate locking devices" is to be understood in particular that the translational locking device and the rotary locking device are formed by functionally independent elements.

By "independently operable locking devices" is to be understood in particular that the translational locking device is independently of a state of the rotary locking device selectively in a release state or in a locking state can be brought or that the rotary locking device regardless of a state of translational locking - -

Device is selectively brought into a release state or a locking state.

Alternatively, it can be provided that the translational locking device can only be selectively brought into the release position or the locking position when the rotary locking device is arranged either in the release position or in the locked position.

Furthermore, it can be provided that the rotary locking device can only be selectively brought into the release position or in the locking position when the translational locking device is either in the release position or in the locked position.

By "successively operable locking devices" is to be understood that the translational locking device and the rotary locking device can not be brought simultaneously from a release position into a locking position or from the locking position to the release position.

Alternatively, however, it may also be provided that the translational locking device and the rotary locking device can be brought simultaneously into the release position from the release position into the locking position or from the locking position.

It may be advantageous if the translational locking device and / or the rotary locking device in each case one or more locking elements, in particular locking elements and / or locking receptacles comprises.

The translational locking device and / or the rotary locking device are in particular formed by one or more locking devices. By latching in particular a tool-free installation without additional aids, such as screws, be made possible. - -

One or more locking elements of the translational locking device and / or the rotary locking device are preferably formed as projections, in particular latching hooks.

The projections, in particular the latching hooks, are arranged and / or formed in particular on a suction chamber element of the base body.

In particular, the projections, in particular the latching hook, formed integrally with the Saugkammerelement and / or formed on the same.

Instead of a plurality of projections, in particular a plurality of latching hooks, it can also be provided that the translational locking device and / or the rotary locking device comprises only a single projection, in particular only a single latching hook.

A latching hook may in particular be a snap hook or the like.

One or more locking elements of the translational locking device and / or the rotary locking device are preferably formed as projections, in particular as latching hooks and arranged on a mixing channel element of the base body, in particular integrally formed therewith or formed on the same.

It can be provided that a locking element of the translational locking device is designed as an annular bead or thickening, in particular as a latching ring, on an outer side of a connecting piece of the suction channel.

In particular, such an annular bead or thickening can be gripped behind by means of one or more latching hooks in order to achieve a translatory locking. Due to the annular configuration of the bead or thickening, in particular despite the translational locking still a rotary movement (rotation) may be possible. - -

As an alternative to defining locking elements designed as projections, in particular as snap-in hooks, on a locking element designed as an annular bead or thickening, the fixing may be provided on or in one or more recesses. The one or more depressions then also form locking elements in particular, in particular locking elements of the translational locking device and / or the rotary locking device.

In particular, pairs of locking elements, for example, in each case a latching hook and a recess, provided for the realization of the locking action.

The positions of the locking elements described in the present description and the appended claims as well as in the accompanying drawings can be chosen arbitrarily, in particular the locking elements formed as projections, for example as latching hooks, can be replaced by locking elements designed as recesses or annular bead or thickening, if in turn, designed as depressions or as an annular bead or thickening locking elements by projections, in particular latching hooks to be replaced.

It is therefore irrelevant for the invention whether, for example, formed as projections locking elements of the body engage in corresponding recesses in the suction channel or engage as projections formed locking elements of the suction channel into corresponding recesses in the body.

In one embodiment of the invention can be provided that one or more locking elements of the translational locking device and / or the rotary locking device are formed as recesses in a connecting piece of the suction channel. - -

The one or more depressions are in particular arranged behind a locking element of the translatory locking device designed as an annular bead or thickening.

As projections, in particular latching hooks, formed locking elements, which are arranged on the main body of the ejector, then, for example, the trained as an annular bead or thickening locking engage behind to cause the translational locking. By subsequent rotation of the main body relative to the suction channel, the projections, in particular latching hooks can then be guided into the recesses in the connecting piece, in order finally to effect the rotary locking.

It may be favorable if one or more locking elements of the translational locking device and / or of the rotary locking device are arranged on a half of the mixing channel element facing away from the suction chamber, in particular on an end region of the mixing channel element facing away from the suction chamber. In this way, in particular, an increased lever effect can be used to stably fix the base body due to the spaced apart from the central axis of the connecting piece attack point of the locking elements.

In one embodiment of the invention can be provided that the Ejektorvorrichtung comprises a fastening device by means of which the main body is first pushed by a translational movement along a translation direction on a connecting piece of a suction channel and by means of which the base body then about a central axis of the

Rotatable connection piece and thereby in a Drehausrichtung relative to the connection piece is fixed.

As a result, in particular a Drehausrichtung the body when pushing the same on the connecting piece in a wide range freely selectable. This can simplify the assembly of the ejector device. - -

The translation direction is in particular a direction parallel to the central axis of the connecting piece.

It can be provided that the connecting piece and / or a suction channel connection of the suction chamber element comprises a sealing element receptacle for receiving a sealing element, in particular an O-ring. The sealing element receptacle can be formed in particular by an annular groove.

By means of a sealing element received in the sealing element receptacle, in particular a reliable sealing in the transition region between the suction channel and the main body of the ejector device can be ensured.

In particular, when the Ejektorvorrichtung should be particularly easy and inexpensive to produce, a plurality of components of the Ejektorvorrichtung are preferably formed of a plastic material.

Also, a driving nozzle member of the driving nozzle device is preferably formed of a plastic material.

However, it can also be provided that a driving nozzle element of

Treibdüsenvorrichtung is formed of a metallic material.

In particular, it can be provided that the motive nozzle element comprises a metallic material, for example brass, or is formed from a metallic material, in particular brass.

The motive nozzle element is preferably formed of a material which is harder and / or more stable than a material from which the

Suction chamber element is formed. - -

The motive nozzle element can be formed, for example, from a plastic material that is harder in comparison to a plastic material of the suction chamber element. For example, it can be provided that the

Suction chamber element made of an injection-moldable thermoplastic

Plastic material is formed and that the motive nozzle element is formed of a particular high-strength plastic material and / or PEEK material.

It can be provided that the motive nozzle element is formed from a ceramic material or comprises a ceramic material.

The motive nozzle element is preferably embedded in the suction chamber element.

It can be provided that the motive nozzle element is arranged or can be arranged on or in a motive nozzle element receptacle of the suction chamber element.

The motive nozzle element receptacle can be, for example, a threaded insert in the suction chamber element.

Furthermore, the motive nozzle element receptacle can be formed by the Saugkammerelement itself.

The motive nozzle element is preferably formed in one piece, in particular as a metal turned part.

The motive nozzle element receptacle is preferably a section of the suction chamber element formed from a plastic material.

In particular, it may be provided that the ejector device has a suction-chamber element designed as a plastic injection-molded component and a - - Directly embedded in the Saugkammerelement Treibdüsenelement.

The motive nozzle element is preferably a separate, stable and / or long-term resistant component, which has a high dimensional stability and a good precision and abrasion behavior.

Preferably, by direct joining to the plastic give a sufficient tightness property.

The motive nozzle member may be defined, for example, by molding it during manufacture of the suction chamber member in the suction chamber member.

Alternatively or additionally, it can be provided that the motive nozzle element is fixed by hot embedding in the previously completed Saugkammerelement in the Saugkammerelement.

In addition, it may be provided that the motive nozzle element is fixed by Kalteinpressen in the previously completed Saugkammerelement in the Saugkammerelement.

The ejector device described above is particularly suitable for use in a combination of a cylinder head cover and an ejector device.

The combination preferably has one or more of the

In connection with the Ejektorvorrichtung invention described features and / or advantages.

It may be favorable if the cylinder head cover one or more

Locking elements of a translational locking device and / or one or more locking elements of a rotary locking device comprises. - -

The one or more locking elements of the translational locking device and / or the one or more locking elements of the rotary locking device are preferably for translational and / or rotational locking of the main body of the Ejektorvorrichtung relative to the cylinder head cover with one or more arranged on the body locking elements of the translational locking device and / or the rotary locking device engageable, in particular latching engageable.

The cylinder head cover is or preferably comprises a plastic injection molded component.

In particular, the cylinder head cover comprises a one-piece hood body for covering a valve chamber of an internal combustion engine.

The hood body is in particular a plastic injection-molded component, to which one or more locking elements are integrally formed or which comprises one or more locking elements in one piece.

The translational locking device and / or the rotary locking device each comprise at least one latching device or are each formed by at least one latching device.

The term "locking device" includes in particular also a snap connection, clip connection, etc.

Under a "notches" is included in this description and the attached

Claims in particular a passing of two locking elements

to understand each other to set the latching elements with respect to a locking behind each other behind each other. - -

A cross-engagement is in particular a non-detachable connection such that the locking elements can not be separated from each other by pulling them along the locking direction.

For locking latching elements in particular a resistance is overcome in order to connect the latching elements with respect to the locking device form-fitting manner with each other. A return movement is then prevented by the engaging behind.

Further preferred features and / or advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

In the drawings show:

Fig. 1 is a schematic perspective view of a

body of an ejector device;

FIG. 2 is a schematic perspective illustration of a suction chamber element of the main body of the ejector device of FIG. 1; FIG.

3 is a schematic perspective illustration of a motive nozzle element of a motive nozzle device of the main body of the ejector device from FIG. 1 ;

4 is a schematic perspective illustration of a mixing channel element of the main body of the ejector device from FIG. 1;

5 shows a schematic longitudinal section through the main body of FIG. 1; - - A schematic perspective view of the ejector device of FIG. 1 and a partially shown cylinder head cover, on which the Ejektorvorrichtung can be fixed, wherein the Ejektorvorrichtung is spaced from the cylinder head cover; 6 is a schematic representation corresponding to the Ejektorvorrichtung and the cylinder head cover, wherein the Ejektorvorrichtung is pushed onto a suction channel of the cylinder head cover and latched to the same; an enlarged view of a connecting piece of the suction channel together with the attached part of the Ejektorvorrichtung; another schematic perspective view of the Ejektorvorrichtung and the cylinder head cover in the state shown in Figure 7; a schematic perspective view of the Ejektorvorrichtung and the cylinder head cover, wherein the Ejektorvorrichtung is fixed on the one hand by means of a translational locking device to the suction channel and on the other hand by means of a rotary locking device on a hood body of the cylinder head cover; an enlarged view of the rotary locking device of FIG. 10; a schematic perspective view of a second embodiment of an ejector device including a cylinder head cover for fixing the Ejektorvorrichtung, - - Wherein a force acting on the suction nozzle of the suction channel rotary locking device is provided;

13 shows a schematic side view of a suction chamber element of the base body of the ejector device and of a connecting piece of the suction channel of the combination of ejector device and cylinder head cover from FIG. 12; a schematic plan view from above of the combination of Ejektorvorrichtung and cylinder head cover of FIG. 13; a schematic section through the connecting piece of the suction channel and the adjoining part of the Saugkammerelements of the main body of the combination of FIG. 12; a schematic perspective view of the combination of Ejektorvorrichtung and cylinder head cover of Figure 12, wherein the main body of the Ejektorvorrichtung is separated from the suction channel. a schematic sectional view of an embodiment of a driving nozzle device; and a schematic representation corresponding to FIG. 17 of a further embodiment of a driving nozzle device.

Identical or functionally equivalent elements are provided with the same reference numerals in all figures. - -

A first embodiment of an ejector device designated as a whole as 100 shown in FIGS. 1 to 11 is used, for example, in motor vehicle construction. The ejector device 100 serves in particular as a suction device for sucking or sucking oil mist-containing gas from a crankcase of an internal combustion engine.

For this purpose, the ejector device 100 is arranged in particular on a cylinder head cover 102 of the internal combustion engine.

First, the details of the ejector device 100 will be discussed below. In the further course, the attachment of the same to the cylinder head cover 102 will be explained.

The ejector device 100 comprises a suction chamber 104 for suction of a suction medium, in particular oil mist-containing gas.

Furthermore, the ejector device 100 comprises a mixing channel 106 and a blowing nozzle device 108.

By means of the driving nozzle device 108, a jet of a driving medium can be generated.

This jet can be directed out of the suction chamber 104 and into the mixing channel 106, as a result of which a suction effect can be generated in the suction chamber 104.

The suction chamber 104 is in particular substantially annular or toroidal in shape and surrounds the motive nozzle device 108 in FIG

Essentially annular or toroidal.

The suction chamber 104 is in particular an inner space 110 of a suction chamber element 112. - -

The mixing channel 106 is in particular an interior 114 of a mixing channel element 116.

The suction chamber element 112 further comprises a drive medium connection 118, via which the drive nozzle device 108 can be supplied with propellant medium.

Furthermore, the suction chamber element 112 preferably comprises a blowing medium channel 120, by means of which the blowing medium supplied via the blowing medium connection 118 can be fed to a blowing nozzle element 122 of the blowing nozzle device 108.

The motive nozzle element 122 is in particular part of the suction chamber element 112 or an additional component embedded in the suction chamber element 112.

In particular, the driving nozzle element 122 is a metallic component, in particular of brass, which is fixed by extrusion coating, hot embedding or Kalteinpressen on or in the Saugkammerelement 112.

In this case, the suction chamber element 112 in particular forms a driving nozzle element receptacle 124 for receiving the motive nozzle element 122.

The suction chamber member 112 preferably forms an enclosure 126 for the suction chamber 104.

In the housing 126, a suction opening 128 is preferably provided.

This suction opening 128 is in particular part of a suction channel connection 129 for connecting the suction chamber element 112 with a suction channel to be described later.

The suction chamber member 112 further includes a flange portion 130 for connecting the suction chamber member 112 to the mixing channel member 116. - -

The flange portion 130 is thus in particular a connecting portion 132.

As in particular Fig. 2, the suction channel connection 129 of the suction chamber element 112 preferably comprises a sealing element receptacle 134 for receiving a sealing element 136 (see in particular FIG. 5).

The sealing element receptacle 134 is, in particular, an annular groove 138 on or in a section of the suction channel connection 129 to be inserted into the suction channel or to be placed on it.

As Fig. 5, the mixing channel 106 comprises a tapering section 140, which adjoins the suction chamber 104 in particular.

In addition, the mixing channel 106 comprises a widening portion 142, which in particular adjoins the tapering portion 140.

Two mutually opposite ends of the mixing channel 106 forming or surrounding mixing channel element 116 are on the one hand by a

Flange portion 130 of the mixing channel element 116 and on the other hand formed by a discharge port 144 of the mixing channel element 116.

The mixing channel element 116 in particular forms an enclosure 146 for the mixing channel 106.

As in particular the Fig. 1 and 4, the mixing channel element 116 comprises one or more stiffening ribs 148, which in particular protrude radially outward from the housing 146 of the mixing channel 106 in a star shape. - -

As Fig. 5, the suction chamber element 112 and the mixing channel element 116 are connected to one another with their respective flange sections 130, for example by welding.

The cylinder head cover 102 and the fixing of the ejector device 100 to the cylinder head cover 102 will now be discussed.

However, the ejector device 100 may be similarly fixed to any other components and devices.

As can be seen in particular from FIGS. 6 to 11, the cylinder head cover 102 in particular comprises a hood body 150, which covers in particular a valve chamber of an internal combustion engine.

The hood body 150 is designed in particular as an injection-molded plastic component.

Preferably, the cylinder head cover 102 further comprises a suction channel 152, via which gas, in particular oil mist-containing gas, from a crankcase and / or any other acted upon by oil mist part of the internal combustion engine can be discharged.

In particular, one end 154 of the suction channel 152 forms a connecting piece 156 for connecting and / or connecting and / or fixing the ejector device 100.

The ejector device 100 may include the suction channel 152.

For ease of reference and explanation, reference will now be made, in place of the entire ejector device 100, to a main body 158 of the ejector device 100. - -

This main body 158 is in particular formed by the suction chamber element 112, the mixing channel element 116 and the motive nozzle device 108, in particular the motive nozzle element 122.

Optionally, the sealing element 136 may be part of the main body 158 or fixed to the same.

For fixing the main body 158 of the ejector device 100 to the cylinder head cover 102, a fastening device 160 of the ejector device 100 is provided in particular.

The fastening device 160 comprises in particular one or more locking devices 162, which are preferably designed as latching devices 164.

Preferably, the fastening device 160 comprises a translatory

Locking device 166 for fixing the base body 158 to the suction channel 152 such that a displacement of the base body 158 relative to the suction channel 152 along a central axis 168 of the connecting piece 156 is effectively prevented.

By means of the translational locking device 166, the base body 158 can preferably be pushed onto the suction channel 152 and secured to the suction channel 152 so that the base body 158 can no longer be pulled off the suction channel 152 against a pushing direction (at least not without a special actuation of the translatory locking device 166).

The translational locking device 166 comprises in particular one or more locking elements 170. - -

A locking element 170 of the translational locking device 166 is designed in particular as a latching element 172, for example as a latching hook 174.

Preferably, a plurality of such locking elements 170 are provided.

In particular, the translatory locking device 166 comprises two locking elements 170 designed as latching hooks 174.

Furthermore, the translational locking device 166 preferably comprises a locking element 170 designed as a locking ring 176.

The latching elements 170 designed as latching hooks 174 can preferably be latched with the locking element 170 designed as a latching ring 176 in order to realize the translatory latching.

The latching hooks 174 are preferably arranged and / or formed on the suction chamber element 112 of the main body 158.

The locking ring 176 is preferably arranged and / or formed on the connecting piece 156 of the suction channel 152.

However, it can also be a reverse arrangement provided such that the latching hooks 174 are arranged and / or formed on the connecting piece 156 of the suction channel 152, while the locking ring 156 is arranged and / or formed on the Saugkammerelement 112 of the base body 158.

By means of the latching hooks 174, the latching ring 156 can preferably be gripped behind the center axis 168 in a form-fitting manner.

The locking ring 176 is preferably rotationally symmetrical. - -

In the translationally locked state of the main body 158 of the ejector device 100 on the cylinder head cover 102, as illustrated in FIGS. 7 and 8, a rotational movement of the main body 158 about the central axis 168 is thus still possible as before.

The main body 158 can thus be placed in different Drehausrichtungen on the suction channel 152. Following this, and thus after the translational locking, a further determination can be made to avoid any relative movement of the base body 158 relative to the cylinder head cover 102.

This further determination is effected in particular by means of a rotary locking device 178 (see FIGS. 9 to 11).

The rotary locking device 178 preferably comprises one or more locking elements 170.

The locking elements 170 of the rotary locking device 178 are formed, for example, as latching elements 172, in particular as latching hooks 174.

Preferably, a locking element 174 designed as a locking element 170 of the rotary locking device 178 is arranged and / or formed on the mixing channel element 116 of the main body 158.

Another detent element 170, designed as a latching hook 174, of the rotary locking device 178 is preferably arranged and / or formed on the cylinder head cover 102.

The two latching hooks 174 can be brought into engagement with each other in particular by a rotational movement of the main body 158 about the center axis 168, in particular to fix the main body 158 of the ejector device 100 in a predetermined rotational orientation relative to the suction channel 152 (see in particular FIGS. 10 and 11). - -

A latching element 170, designed as a latching hook 174, of the rotary

Locking device 178 is formed and / or arranged in particular on an end region 180 of the mixing channel element 116 facing away from the suction chamber element 112. Due to the resulting distance of the rotary locking device 178 from the central axis 168 of the connecting piece 156 of the suction channel 152, a large lever effect is available, resulting in a reliable and secure rotational fixing of the base body 158 on the cylinder head cover 102.

The ejector device 100 may further include a positioning device 182.

Such a positioning device 182 serves, in particular, for the reliable positioning of the main body 158 before, during and / or after the latching of the latching elements 174 of the rotary locking device 178.

In particular, by means of the positioning device 182, it is preferably possible to prevent the locking elements 170 of the rotary locking device 178, which are designed as latching elements 174, from disengaging during operation of the ejector device 100, in particular during operation of the internal combustion engine, because the otherwise not further secured end region 180 of the mixing channel element 116 could be subjected to strong vibrations or movements.

The positioning device 182 comprises in particular one or more positioning elements 184.

For example, two positioning elements 184 designed as projections 186 are arranged and / or formed on the cylinder head cover 102.

Between these two projections 186, in particular a stiffening rib 148 of the mixing channel element 116 serving as a positioning element 184 can be provided. - - are brought to ultimately position the entire mixing channel element 116 and thus the base body 158 reliable.

The main body 158 can be produced in particular as follows:

First of all, the suction chamber element 112 and the mixing channel element 116 are preferably produced as separate individual injection molded plastic components.

Further, the driving nozzle element 122 is manufactured, in particular by shaping, for example turning, a metal part.

In a next step, the motive nozzle element 122 is connected to the Saugkammerelement 112, for example by hot embedding or Kalteinpressen.

However, it can also be provided that the motive nozzle element 122 is arranged by molding it with plastic during the manufacture of the Saugkammerelements 112 and / or in the Saugkammerelement 112.

In a further step, the suction chamber element 112 and the mixing channel element 116 are connected to one another.

In particular, the two flange portions 130 of the Saugkammerelements 112 and the mixing channel element 116 are welded together by plastic welding.

In particular, this results in a gas-tight connection.

Finally, a sealing element 136 is preferably arranged in the sealing element receptacle 134. - -

In this way completed body 158 of the ejector device 100 is then pushed along the central axis 168 with the Saugkanalanschluss 130 of the Saugkammerelements 112 on the connecting piece 156 of the suction channel 152.

The locking hooks 174 of the translational locking device 166 engage behind the locking ring 176 of the translational locking device 166, so that the base body 158 is secured against displacement thereof relative to the suction channel 152.

In a further step, the base body 158 is rotated about the central axis 168 of the connecting piece 156 until the two locking elements 170 of the rotary locking device 178 designed as latching hooks 174 engage with one another.

In addition, during this rotation of the main body 158 about the central axis 168 of the connecting piece 156, an optimal positioning of the main body 158 is achieved by inserting a reinforcing rib 148 of the mixing channel element 116 serving as positioning element 184 between two positioning elements 184 designed as projections 186.

The fact that both the translational locking device 166 and the rotary locking device 178 allow a latching fixing of the main body 158 on the cylinder head cover 102, this determination can be done without tools and thus with very little effort.

A second embodiment of an ejector device 100 shown in FIGS. 12 to 16 essentially differs from the first embodiment shown in FIGS. 1 to 11 in that, as an alternative or in addition to the embodiment shown in FIGS. 1 to 11, a rotary locking device 178, which is arranged and / or formed in the region of the suction channel connection 130 and the connection piece 156, is provided. - -

The rotary locking device 178 is formed on the one hand by one or more locking elements of the translational locking device 166 and on the other hand by one or more locking elements 170 formed as depressions 188 of the rotary locking device 178.

The locking elements 170, which are thus assigned to both the translational locking device 166 and the rotary locking device 178, are in particular designed as latching hooks 174.

The depressions 188 are arranged, in particular, on a side of a locking element 170 of the translatory locking device 166 which is remote from the suction chamber 104 and is designed as a latching ring 176.

The depressions 188 are not formed completely circumferentially, in particular not annularly closed, but merely form local recesses 188 in a region of the connection stub 156 which is preferably located directly behind the detent ring 176.

As in particular from a comparison of FIG. 12 and 13, the locking elements 170 formed as latching hooks 174 and the locking elements 170 formed as depressions 188 are preferably designed and / or arranged such that they can be fixed to one another in a circumferential direction of the connecting piece 176 in a form-fitting manner.

In the embodiment of the ejector device 100 shown in FIGS. 12 to 16, the main body 158 may also be provided as in the embodiment shown in FIGS. 1-11 shown embodiment are pushed in a variety of different Drehausrichtungen on the connecting piece 156 of the suction channel 152 in order to achieve the translational locking.

Subsequently, by rotating the main body 158 about the central axis 168 of the connecting piece 156, the rotary locking can be performed. - -

In this case, in particular, the locking elements 170 formed as latching hooks 174 and engaging behind the latching ring 176 are moved in the circumferential direction until they engage in the recesses 188 and are fixed in a form-fitting manner with respect to the circumferential direction.

Because of this positive fixing the entire body 158 is then secured relative to the suction channel 152 against further rotation.

Incidentally, the in Figs. 1 to 16 illustrated second embodiment of the Ejektorvorrichtung 100 in structure and function with the in Figs. 1 to 11 illustrated first embodiment, so that reference is made to the above description thereof in this regard.

In the Figs. FIGS. 17 and 18 show different variants of blowing nozzle devices 108, which are alternative to the one shown in FIGS. 1 to 11 illustrated embodiment may be provided.

In the in Fig. 17 illustrated embodiment of the driving nozzle device 108 is provided in particular that the driving nozzle element 122 extends from an opening into the suction chamber 104 end 190 against a jet direction 192 to a region outside the Saugkammerelements 112.

A drive medium passage 120 different from the drive nozzle element 122 is thus not provided. Rather, the motive nozzle element 122 itself at the same time forms the motive medium connection 118.

The blowing medium connection 118 may be formed, for example, as an internal thread 194 in, for example, a substantially hollow cylindrical blowing nozzle element 122. - -

In this internal thread 194 in particular a connecting line for supplying driving medium can be screwed.

The suction chamber 104 facing the end 190 of the motive nozzle element 122 is provided for example with a swirl body 196.

In particular, a swirl flow in the mixing channel 106 can be generated by means of such a swirler 196. This serves in particular for an optimized suction effect.

Incidentally, the in Fig. 17 illustrated embodiment of the driving nozzle device 108 in terms of structure and function and in terms of production with the in Figs. 1-11, so that reference is made to the above description thereof.

In particular, the embodiment of the motive nozzle device 108 shown in FIG. 17 may also be manufactured such that the motive nozzle element 122 is disposed on the suction chamber element 112 by molding it with plastic during the production of the suction chamber element 112. Alternatively, a hot embedding or Kalteinpressen the

Treibdüsenelements 122 may be provided in the Saugkammerelement 112.

One in Fig. 18 further differs from the embodiment illustrated in FIG. 17 essentially in that a kind of quick-action coupling 198 is provided as the drive-medium connection 118.

Incidentally, the in Fig. 18 illustrated embodiment of the driving nozzle device 108 in terms of structure and function and in terms of production with the in Fig. 17 illustrated embodiment, so that reference is made to the above description thereof in this regard.

Preferred embodiments are the following: An ejector device (100) comprising a main body (158) comprising:

a suction chamber (104) for sucking a suction medium; a mixing channel (106) for mixing a propellant with the suction medium;

a motive nozzle device (108) for generating a motive medium jet directed out of the suction chamber (104) along a jet direction (192) and into the mixing channel (106). Ejector device (100) according to embodiment 1, characterized

in that the base body (158) comprises a suction chamber element (112) surrounding the suction chamber (104) and / or a mixing channel element (116) surrounding the mixing channel (106). Ejector device (100) according to embodiment 2, characterized

characterized in that the suction chamber member (112) and the

Mixed channel element (116) are formed by mutually different and after the respective individual production interconnected plastic injection-molded components. Ejector device (100) according to embodiment 3, characterized

characterized in that the suction chamber member (112) and the

Mixed channel element (116) are connected together in a flange, in particular welded together. Ejector device (100) according to one of embodiments 1 to 4, characterized in that the mixing channel (106), in particular a mixing channel element (116) of the base body (158), comprises: a tapered portion (140) which extends along the beam direction (192) adjoins the suction chamber (104) and which has an inner cross-sectional area which decreases continuously and / or continuously along the beam direction (192), and / or - - A widening portion (142), which adjoins the tapered portion (140) along the beam direction (192) and which has a along the beam direction (192) continuously and / or continuously increasing inner cross-sectional area.

Ejector device (100) according to one of embodiments 1 to 5, characterized in that a Saugkammerelement (112) of the base body (158) comprises one or more or all of the following components:

an enclosure (146) for the suction chamber (104);

a suction port (129);

a motive medium port (118);

a motive nozzle element receptacle (124);

a motive medium channel (120) for fluidly connecting the motive medium port (118) to the motive nozzle element receptacle (124);

a flange portion (130) for connecting the suction chamber member (112) to a mixing channel member (116) of the base body (158) different therefrom;

one or more locking elements (170) of a translational locking device (166) of a fastening device (160) for fastening the base body (158) to a suction channel (152);

one or more locking elements (170) of a rotary locking device (178) of a fastening device (160) for fastening the base body (158) to a suction channel (152);

a positioning device (182) for positioning the suction chamber element (112) relative to a translational locking device (166) and / or relative to a rotary locking device (178).

Ejector device (100) according to one of the embodiments 1 to 6, characterized in that a mixing channel element (116) of the

Basic body (158) comprises one or more or all of the following components: - an enclosure (146) for the mixing channel (106);

a discharge port (144);

a flange portion (130) for connecting the mixing channel member (116) to a suction chamber member (112) of the base body (158) different therefrom;

a positioning device (182) for positioning the mixing channel element (116) relative to a translational locking device (166) and / or relative to a rotary locking device (178). Ejector device (100) according to one of embodiments 1 to 7, characterized in that a Saugkammerelement (112) of the base body (158) is a unitary component for receiving

Heated nozzle elements (122) of different type and / or size and / or for connection to mixing channel elements (116)

different type and / or size is. Ejector device (100) according to any one of embodiments 1 to 8, characterized in that a Saugkammerelement (112) and / or a mixing channel element (116) of the base body (158) are formed as plastic injection molded components and have a Hauptentformungsrichtung, which parallel to the beam direction ( 192). Ejector device (100) according to one of the embodiments 1 to 9, characterized in that the Ejektorvorrichtung (100) a

Fastening device (160) for fastening the main body (158) of the ejector device (100) to a suction channel (152), wherein the fastening device (160) has a translatory locking device - -

(166) for preventing a translational movement of the main body (158) relative to the suction channel (152) in a parallel to a

Central axis (168) of a connecting piece (156) of the suction channel (152) extending direction comprises. Ejector device (100) according to one of embodiments 1 to 10, characterized in that the ejector device (100) has a

Fastening device (160) for fastening the main body (158) of the ejector device (100) to a suction channel (152), wherein the fastening device (160) comprises a rotary locking device (178) for preventing rotation of the main body (158) relative to the suction channel (15) 152). Ejector device (100) according to one of embodiments 1 to 11, characterized in that the ejector device (100) has a

Fastening device (160) for fastening the main body (158) of the ejector device (100) to a suction channel (152), wherein the fastening device (160) comprises a translatory locking device (166) and a rotary locking device (178), wherein the translational locking device (15) 166) and the rotary locking device (178)

a) different from each other,

b) spatially separated,

c) functionally separated from each other,

d) independently operable and / or

e) can be actuated in chronological succession. Ejector device (100) according to any one of embodiments 11 or 12, characterized in that the translational locking device (166) and / or the rotary locking device (178) each have one or more locking elements (170), in particular latching elements (172) and / or latching receptacles, includes. Ejector device (100) according to embodiment 13, characterized

characterized in that one or more locking elements (170) of the translational locking device (166) and / or the rotary

Locking device (178) as projections (186), in particular as a latching hook (174), on a Saugkammerelement (112) of the

Base body (158) are formed. Ejector device (100) according to one of the embodiments 13 or 14, characterized in that one or more locking elements (170) of the translational locking device (166) and / or the rotary

Locking device (178) are formed as projections (186, in particular as latching hooks (174) on a mixing channel element (116) of the main body (158) .Ejector device (100) according to one of the embodiments 13 to 15, characterized in that a locking element (170 ) of the

translational locking device (166) as an annular bead or

Thickening, in particular as a locking ring (176), on an outer side of a connecting piece (156) of the suction channel (152) is formed. Ejector device (100) according to one of the embodiments 13 to 16, characterized in that one or more locking elements (170) of the translational locking device (166) and / or the rotary

Locking device (178) as depressions (188) in one

Connecting piece (156) of the suction channel (152) are formed. Ejector device (100) according to one of the embodiments 13 to 17, characterized in that one or more locking elements (170) of the translational locking device (166) and / or the rotary

Locking device (178) on one of the suction chamber (104) facing away from half of the mixing channel element (116), in particular on a suction chamber (104) facing away from the end region (180) of the mixing channel element (116) are arranged. - ejector device (100) according to one of the embodiments 1 to 18, characterized in that the ejector device (100) a

Fastening device (160), by means of which the

Base body (158) is first pushed by a translational movement along a translation direction on a connecting piece (156) of a suction channel (152) and by means of which the base body (158) then about a central axis (168) of the connecting piece (156) rotatably and thereby in a Drehausrichtung relative to the connecting piece (156) can be fixed. Ejector device (100) according to one of embodiments 1 to 19, characterized in that the Ejektorvorrichtung (100) comprises a formed as a plastic injection molded Saugkammerelement (112) and a directly in the Saugkammerelement (112) embedded Treibdüsenelement (122). Ejector device (100) according to embodiment 20, characterized

in that the motive nozzle element (122) comprises a metallic material, in particular brass, or is formed from a metallic material, in particular brass. An ejector device (100) according to one of the embodiments 20 or 21, characterized in that the motive nozzle element (122)

a) by overmolding during the production of the Saugkammerelements (112),

b) by hot embedding in the previously completed Saugkammerelement (112) or

c) by cold pressing into the previously completed Saugkammerelement (112)

is fixed in the Saugkammerelement (112). Combination of a cylinder head cover (102) and an ejector device (100) according to one of the embodiments 1 to 22. - -

Combination according to embodiment 23, characterized in that the cylinder head cover (102) comprises one or more locking elements (170) of a translational locking device (166) and / or one or more locking elements (170) of a rotary locking device (178) which is used for translational and / or or rotative locking of the main body (158) of the ejector device (100) relative to the

Cylinder head cover (102) with one or more on the base body (158) arranged locking elements (170) of the translational locking device (166) and / or the rotary locking device (178) are engageable.

Claims

claims

An ejector device (100) comprising a body (158) comprising:

a propellant nozzle device (108) for generating a motive medium jet directed out of the suction chamber (104) along a jet direction (192) and into the mixing channel (106), the main body (158) including a suction chamber element (112) surrounding the suction chamber (104) a mixing channel element (116) surrounding the mixing channel (106), the suction chamber element (112) and the mixing channel element (116) passing through one another

different and after the respective individual production interconnected plastic injection molded components are formed.

2. Ejektorvorrichtung (100) according to claim 1, characterized in that the Saugkammerelement (112) and the mixing channel element (116) in a flange (130) are welded together.

3. Ejektorvorrichtung (100) according to any one of claims 1 or 2, characterized in that the mixing channel (106), in particular a mixing channel element (116) of the base body (158), comprising:

a tapered section (140) which adjoins the suction chamber (104) along the beam direction (192) and which has an inner cross-sectional area which decreases continuously and / or continuously along the beam direction (192), and / or

a flared portion (142) which adjoins the tapered portion (140) along the beam direction (192) and which has an inner cross-sectional area which increases continuously and / or steadily along the beam direction (192).

Ejector device (100) according to one of claims 1 to 3, characterized in that a Saugkammerelement (112) of the base body (158) comprises one or more or all of the following components:

an enclosure (146) for the suction chamber (104);

a suction port (129);

a motive medium port (118);

a motive nozzle element receptacle (124);

Ejector device (100) according to one of claims 1 to 4, characterized in that a mixing channel element (116) of the base body (158) comprises one or more or all of the following components:

an enclosure (146) for the mixing channel (106);

a discharge port (144);

a flange portion (130) for connecting the mixing channel member (116) to a suction chamber member (112) of the base body (158) different therefrom; one or more locking elements (170) of a translational locking device (166) of a fastening device (160) for fastening the base body (158) to a suction channel (152);

a positioning device (182) for positioning the mixing channel element (116) relative to a translational locking device (166) and / or relative to a rotary locking device (178).

6. Ejektorvorrichtung (100) according to any one of claims 1 to 5, characterized in that a Saugkammerelement (112) of the base body (158) is a unitary component for receiving Treibdüsenelementen (122) of different types and / or size and / or for connection to mixing channel elements (116) of different type and / or size.

7. Ejektorvorrichtung (100) according to any one of claims 1 to 6, characterized in that a Saugkammerelement (112) and / or a mixing channel element (116) of the base body (158) are formed as plastic injection-molded components and have a Hauptentformungsrichtung, which parallel to Beam direction (192) is.

The ejector device (100) according to any one of claims 1 to 7, characterized in that the ejector device (100) comprises a fastening device (160) for fastening the main body (158) of the ejector device (100) to a suction channel (152)

Fastening device (160) comprises a translatory locking device (166) for preventing a translational movement of the main body (158) relative to the suction channel (152) in a direction parallel to a central axis (168) of a connecting piece (156) of the suction channel (152) extending direction.

The ejector device (100) according to any one of claims 1 to 8, characterized in that the ejector device (100) comprises a fastening device (160) for fastening the main body (158) of the ejector device (100) to a suction channel (152)

Fastening device (160) comprises a rotary locking device (178) for preventing rotation of the base body (158) relative to the suction channel (152).

10. Ejector device (100) according to one of claims 1 to 9, characterized in that the Ejektorvorrichtung (100) comprises a fastening device (160) for fixing the main body (158) of the Ejektorvorrichtung (100) to a suction channel (152), wherein the

Fixing device (160) comprises a translatory locking device (166) and a rotary locking device (178), wherein the translational locking device (166) and the rotary locking device (178)

a) different from each other,

b) spatially separated,

c) functionally separated from each other,

d) independently operable and / or

e) can be actuated in chronological succession.

11. Ejektorvorrichtung (100) according to any one of claims 9 or 10, characterized in that the translational locking device (166) and / or the rotary locking device (178) each one or more

Locking elements (170), in particular locking elements (172) and / or locking receptacles comprises.

12. Ejektorvorrichtung (100) according to claim 11, characterized in that one or more locking elements (170) of the translational locking device (166) and / or the rotary locking device (178) as projections (186), in particular as a latching hook (174) on a Saugkammerelement (112) of the base body (158) are formed.

13. ejector device (100) according to any one of claims 11 or 12, characterized in that one or more locking elements (170) of the translational locking device (166) and / or the rotary locking device (178) as projections (186), in particular as latching hooks ( 174) are formed on a mixing channel element (116) of the main body (158).

14. Combination of a cylinder head cover (102) and an ejector device (100) according to one of claims 1 to 13.