DE102014102596A1 - Blow-by facility - Google Patents

Abstract

Disclosed is a blow-by device with a coupling piece and a suction system-side connecting piece, wherein in the region of the coupling piece and / or the connection piece electrical contacts of an electrical load or signal circuit are formed. By applying a plug, this circuit can be activated. According to the invention, a short-circuiting bridge is provided which shorts the circuit when the coupling piece and connecting piece are not properly connected.

Description

The invention relates to a blow-by device according to the preamble of patent claim 1.

Such a blow-by device is in the documents EP 1 164 264 B1 and EP 1 375 997 B1 the applicant explains. Accordingly, during operation of an internal combustion engine due to leaks in the area of the piston seal, the crankcase fills with combustion gases that mix with oil vapors and are commonly referred to as blowby gases. Due to the stroke of the pistons of the internal combustion engine, these blow-by gases are additionally pressurized, resulting in a pulsating volume flow. Since this contains harmful hydrocarbon compounds and beyond the volume flow is relatively high - even with optimum sealing of the piston rings, the blowby gas volume flow may be about 0.5 to 2% of the total gas flow rate - measures are required to escape these gases to the Environment to avoid.

For this purpose, it is common prior art to provide a vacuum-controlled crankcase ventilation. In this, the blow-by gas flowing out of the crankcase is first passed over an oil separation device, in order then to pass through a pressure regulating valve (blow-by valve) and to reach the intake tract of the internal combustion engine at a point of introduction for afterburning.

The Ölabscheidevorrichtung is for example a cyclone separator, from this, the majority of the oil is returned to the oil pan.

The pressure control valve keeps the negative pressure in the crankcase as constant as possible and limits this. When the engine is at a standstill, the pressure control valve is open. In idling or pushing operation, which is characterized by negative pressure in the intake manifold and little blowby gas, closes the pressure control valve. At higher load more blow-by gas is created, the pressure control valve opens to keep the vacuum about constant.

One problem is that, especially at low outside temperatures, the warm blowby gases collide with the cold intake air and then condensation occurs due to the rapid cooling in the area of the merging of the two gas streams of the discharge point, which can lead to icing in this area. Likewise, icing in the area of the pressure regulating valve is possible. In order to avoid such icing in components, which are flowed through by the blowby gas, they are heated by a heater. Such solutions are already in the DE-AS 24 32 782 . EP 1 314 869 B1 and the DE 195 18 712 A1 described. These heaters are designed as conventional electric heaters. With the aforementioned prior art, it is proposed to use PTC resistance elements (PTC = positive temperature coefficient) as heating elements.

The heating of blow-by gases or components through which these flow is also known from the documents US 4,922,882 and US 4,312,121 known.

One problem with all of these solutions is that, for example, during maintenance work on the engine, it may be possible to forget to reconnect all the fluid connections, in particular the blow-by line connecting the crankcase with the intake tract. For example, the connection between the intake manifold and the blowby heater or the connection between the crankcase and the said heater - this connection is usually through a plastic pipe, e.g. a corrugated tube or a hose formed - stay separated. This accidental separation releases the blow-by gas flow to the environment - this is to be avoided in view of possible environmental pollution. Another problem for the function of the internal combustion engine is that the intake side of the internal combustion engine then draws "false air" and the engine management can no longer work with optimized exhaust gas.

To overcome this disadvantage is in the EP 2 418 361 A2 proposed to perform the blow-by device with an electrically conductive unit which is contacted by means of an electrical connector. This contact can be made only if all fluid connections are made mechanically in the predetermined manner.

To realize this, a plug collar for receiving the plug is formed in the known solution on a coupling piece, wherein the insertion of the plug is only possible when a locking member is moved to a release position. This adjustment of the locking member is made in one embodiment by a driver on the coupling piece, said driver only comes into operative engagement with the locking member when the fluid connection is made properly.

A disadvantage of such a solution that a considerable device-technical effort is required to form on the coupling piece and an associated socket of the plug collar, the driver and the locking part. Furthermore, the plug is used transversely to the axis of the fluid line, so that the space requirement and the installation cost is considerable.

There are also known solutions in which the pulling of "false air" is detected by an air flow meter, so that it can be concluded from the signal of the air flow meter on an improper mechanical connection in the field of blowby device. However, such solutions can only be used with relatively large cable cross-sections.

In the DE 10 2010 020 844 a method for controlling a blowby function of an internal combustion engine is disclosed. This blowby device has a heater for heating the blowby gases. In this case, the power consumption of the heating elements is monitored and in case of a deviation of this power consumption from a predetermined characteristic curve inferred from a blockage or improperly executed connection.

Such a solution requires a considerable regulatory effort.

In contrast, the invention has the object to provide a blow-by device, in which the blow-by gas flow path can be checked by simple means to its proper function.

This object is achieved by a blow-by device having the features of patent claim 1.

Advantageous developments of the invention are the subject of the dependent claims.

According to the invention, the blow-by device of an internal combustion engine is designed with a suction-side connecting piece, which is connected with a coupling piece to a crankcase-side blow-by line. The connection between the coupling piece and the connecting piece is usually secured by means of a securing element in order to prevent accidental release. In the region of the coupling piece or the connecting piece electrical contacts of an electrical load or signal circuit are formed, which are electrically connected by attaching a plug to a directly or indirectly formed on the coupling piece electrical connection with the coupling piece to close the circle. According to the invention, a shorting bridge is provided which short-circuits the electric circuit (load circuit or signal circuit) and which is opened by an actuator when connecting the coupling piece to the suction-side connecting piece in order to remove the short circuit.

This solution according to the invention thus turns away from conventional solutions in which the circuit is closed only by establishing the connection between the coupling piece and intake manifold - in the inventive solution, this electrical circuit for controlling the consumer, for example, a blow-by heater or for delivery a signal to the OBD system (on-board diagnostics) closed, but is bridged by means of the shorting bridge. Such a short circuit can be easily recognized by the known OBD systems, since then the resistance R = 0 or R ≈ 0. Another advantage of such a solution is that via the OBD also clear indications are obtained whether the electrical contact is made by means of the plug or not, since in this case the self-contained circuit is open (ie R = ∞). Another advantage is that in the solution according to the invention - as I said - the consumer circuit or the signal circuit is not interrupted and thus does not have to be closed only by a separate contact. This conventional contact can be solved for example by corrosion or vibration, so that then the respective function fails. In the system according to the invention a failure of such a function is not to be feared, since the operation of the shorting bridge is not affected by vibrations occurring during operation or corrosion or the like. The solution according to the invention thus enables active monitoring of the plug-in connections in the circuit, since the circuit is interrupted for example by the above-mentioned disturbances (release of plug connection due to vibrations, corrosion of plug connections) and a corresponding signal can be given to the motor control.

However, the system according to the invention is by no means limited to use in a heater or the like, but can also be used as a pure plug fuse.

In one embodiment of the invention, the blow-by device is designed with an actuator which has a standing and adjustable with the coupling piece and / or the connecting piece adjustable adjusting element which is adjustable by attaching the coupling piece to the connecting piece from a short-circuit position in the direction of an open position ,

The structure is particularly simple if this actuator is spring-biased in the direction of its short-circuit position and thus must be actively moved in the direction of lifting the short circuit.

This actuator may be a pin in a variant of the invention.

In an advantageous embodiment of the invention, the actuator or the actuating element is in one one or more parts housing out, in which the contacts and the shorting bridge are added. This housing is preferably designed with a plug receptacle.

The actuator can be arranged on the connection piece side or on the coupling piece side.

In one exemplary embodiment, the actuator arranged on the coupling piece or on the connecting piece is assigned an actuating part which is arranged on the respective other component and actuates the actuator when connecting the coupling piece to the connecting piece.

This actuating part is preferably designed as an actuating plate or an actuating push-button.

The invention is preferably formed with a blow-by heater, which is formed in the region of the coupling piece or the connecting piece and is controlled via the consumer circuit.

It is also possible to use a fixed resistor. This then forms a signal circuit together with the electrical connection elements.

Such a heater may have at least one PTC heating element whose ceramic PTC resistor is contacted via contact plates which are short-circuited by means of the shorting bridge.

It is particularly advantageous if these two contact plates are formed with two extending in the parallel direction tabs whose parallel end edges are formed as contact edges, which are short-circuited on the adjacent shorting bridge, the short circuit is lifted when lifting the shorting of the parallel contact edges.

To improve the short-circuit contact, the shorting bridge may be slotted, so that each contact edge is assigned a shorting bridge section. In this way, due to tolerances or assembly errors caused displacements of the contact lugs / contact edges can be compensated.

In an alternative solution, a contact plate may be designed with a contact lug, which is associated with a shorting leg on the shorting bridge, which abuts with a front edge on a contact edge of the contact lug. The other contact plate is designed with an angle leg to which a short-circuit end of the shorting bridge in the short-circuited position rests flat.

In the case of the first-mentioned solution, it is assumed that the two parallel contact edges are in fact aligned with one another, so that a contact to both contact plates can be produced via the short-circuit bridge. In the second alternative, this exact relative positioning of the contact plates / shorting bridge is not so important because two areas of the shorting bridge are used for contacting and thus a contact can be realized with a certain bias, if there is a displacement of the contact plates.

The bias of the shorting bridge in the direction of its short-circuit position is particularly simple if the short-circuiting bridge is formed of sheet metal with a spring section which is supported on the housing side.

This spring portion can be formed in a very simple manner by a zigzag folding of the shorting bridge. Of course, other spring geometries can be realized, so the spring portion or the biasing spring may be formed as a spiral spring, torsion spring, flat spring or the like.

In a very compact design, the housing with the shorting bridge is attached laterally to the coupling piece, so that the installation space is minimal. It is preferred if the contacting takes place via the plug in the direction of the axis of the Blowbystücks.

Preferred embodiments of the invention are explained in more detail below with reference to schematic drawings.

Show it:

1 an exploded view of a first embodiment of a blow-by device with blow-by heating;

2 a detailed representation of the blow-by device according to 1 ;

3 the arrangement according to 2 with an attached plug;

4 a single representation of a coupling piece of the blow-by device according to the 1 to 3 ;

5 a radial section through the coupling piece according to 4 ;

6 an axis-parallel section through the coupling piece according to 4 ;

7 the coupling piece according to the 4 to 6 with removed housing cover;

7a a variant of in 7 illustrated embodiment;

8th one 6 corresponding section showing the coupling piece in case of short circuit;

8a the variant off 7a in case of a short circuit;

9 Another embodiment of a blow-by device;

10 a coupling piece of the embodiment according to 9 with lifted housing cover;

11 a section through a housing of the coupling piece according to 9 ;

12 the coupling piece 9 with attached adapter piece and

13 one 11 corresponding section through the coupling piece according to 12 with canceled short circuit.

As explained, it is common practice to connect the crankcase of an internal combustion engine via a blow-by line with an intake tract, for example a clean air pipe in front of an exhaust gas turbocharger, so that the blow-by gases are withdrawn from the crankcase and admixed with the intake air. In this case, usually in the blowby line, a pressure control valve may be provided which shuts off the blow-by line during idling or during coasting of the engine. The oil content contained in the blow-by gas is separated off via an oil separator, for example a cyclone separator, and returned to the oil circuit via an oil return channel. In order to avoid a problem of icing, the region in which the blow-by line discharges into the intake tract is heated via a blow-by heating device (not shown in detail below).

1 shows a three-dimensional exploded view of a first embodiment of a blow-by device 1 , which in principle consists of a suction system-side connecting piece 2 and a coupling piece provided with a blow-by heater (PTC-based) 4 consists. The blowby heater can be connected via a plug 6 be contacted electrically. The coupling piece 4 has a connection 8th to which a crankcase side pipe is connected. This line is usually designed as a plastic pipe, eg corrugated pipe or hose, so that the connection 8th is formed with a pine cone-like profile for fixing the hose end. The coupling piece is further provided with a multi-part housing 36 executed. The coupling shown 4 has an inner tube 10 whose in 1 right, suction-side end portion of a plastic sheath 12 of the coupling piece 4 protrudes. The pipe 10 must consist of a good thermal conductivity material. Here, for example, a metallic material such as aluminum or copper or a thermally conductive equipped plastic can be used. On the outer circumference of this tube 10 is a sealing arrangement with an O-ring 14 provided on the outer circumference of a seal carrier 16 is attached. This encompasses the tube 10 , The connecting piece 2 has a circumferential sealing collar 18 that then with its inner circumferential wall 20 sealing at the O-ring 14 is applied. At the sealing collar 18 is to the coupling piece 12 towards a trough-shaped retaining sleeve 22 formed in the two diametrically opposed locking recesses 26 are formed, of which only one in 1 is visible. These two recesses act with two on the plastic casing 12 trained snap hook 28 together, of which only one is visible. This snap hook 28 is with its base in the area of the seal carrier 16 to the plastic casing 12 molded and is when inserting the coupling piece 4 in the connecting piece 2 first through the retaining sleeve 22 deflected inward. Upon further insertion, catch noses snap 40 the snap hook 28 in the recesses 26 one, so that connection piece 2 and coupling piece 4 are fixed relative to each other. In this position, then embraces the sealing collar 18 the O-ring. This position is in 2 shown.

On the outer circumference of the sealing collar 18 is also an axially parallel projecting actuating handle 30 provided, which is designed as a cylindrical pin (pin).

This push-button 30 is coupler side 4 a guide bush 32 an actor 34 whose function will be explained later. When connecting the coupling piece 4 and connecting pieces 2 dips the push-button 30 in the guide bush 32 and actuates the actuator 34 (see also 4 ).

At the plastic casing 12 is a multi-part housing 36 formed. This carries the suction side of the guide bush 32 , Connector side is a plug collar 38 formed, the insertion direction is parallel to the coupling piece axis, so that the space is minimal. The plug 6 will be in this plug collar 38 used to close an electrical heating circuit. In the illustrated embodiment, the multi-part housing 36 in the view according to 1 a substantially L-shaped structure.

The already mentioned 2 shows the blowby device after the coupling piece 4 with the connecting piece 2 connected is. You can see that the tube 10 the connecting piece 2 interspersed - the actual fluid connection to the suction line is not shown. It is clearly recognizable that the actuation lever 30 in the guide bush 32 dips and the actor 34 actuated. The snap hooks 28 are with their catch projections 40 in the recesses 26 the retaining sleeve 22 engaged, so that coupling piece 4 and connecting pieces 2 tensile strength are connected.

The trough-shaped sealing collar 22 is on both sides of a guide rail 42 limited when inserted under the housing 36 immersed when the relative positioning between connecting pieces 2 and coupling piece 4 is correct, otherwise this guide bar collides 42 with the housing 36 ,

In the in 2 shown relative position, the fluid connection between the crankcase and the intake system is made. The electrical contact is then made by inserting the plug 6 in the plug collar 4 , where the plug 6 on the outer circumference via a clamping collar 44 on the plug collar 38 is guided. The end position of the plug 6 ( 3 ) is formed by a locking tab integrated in the connector housing 46 causes, in the insertion position in 1 and 2 visible locking projection 48 engages behind.

4 shows the coupling piece 4 opposite the view in the 1 to 3 rotated by about 90 °, with the view from the suction side to the housing 36 is directed. You can clearly see the L-shaped basic structure of the housing 36 , with a lower housing part 50 on which the plug collar 38 is trained. The from the lower part of the housing 50 Spanned space is through an L-shaped housing cover 52 closed, on which the guide bush 32 is trained.

5 shows a section along the line AA in 4 , This cutting plane runs so that you can see the inside of the case 36 sees.

The pipe is also cut in this illustration 10 , the plastic casing 12 and the snap hooks 28 , In the sectional plane AA has the housing 36 an approximately rectangular structure, wherein housing lower part 50 and housing cover 52 a receiving space for a PTC heating element 54 forms. This consists in a known manner of a PTC resistor 56 , also called PTC module and two contact plates 58 . 60 , This in 5 right contact plate 60 is with two notched spring tabs 62 . 64 Running on a supporting wall 66 supported by the housing and thus the PTC heating element 54 Fix in position and in the direction of the pipe 10 press it. Both contact sheets 56 . 58 are formed as stamped and bent parts, wherein an end portion towards two connection pins 68 . 70 is bent, these end portions engage around the two pins, so that there is an electrical contact. On these two connection pins 68 . 70 becomes the plug 6 put on to close the heating circuit.

The two contact plates have two parallel projecting tabs 72 . 74 whose in 5 are formed by the viewer groundbreaking end edges as contact edges on which a transversely extending end edge 76 a shorting bridge 78 is applied. As stated in 6 This shorting bridge is explained 78 resilient in the direction of the abutment position on the two contact lugs 72 . 74 preloaded and displaceable in the housing cover 52 stored. This designed as a stamped bent part shorting bridge 78 is connected to the actuator 34 , which in the concrete solution a pin-shaped actuator 80 has that in the guide bush 32 immersed and in the housing cover 52 is guided. This becomes clearer 6 making a cut along the BB line in 4 shows.

In this illustration you can see the two contact plates 58 . 60 , in this illustration cut spring tabs 62 . 64 that between the two contact sheets 58 . 60 lying PTC resistance element 56 , the two contact flags 72 . 74 and the shorting bridge adjoining it 78 , Well visible in this representation are also the two parallel and aligned mutually extending contact edges 82 . 84 in which an end portion of the short-circuiting bridge angled towards this end 78 with his front edge 76 is applied and thus a short circuit between the two contact plates 58 . 60 so that even when properly contacted via the plug 6 a short circuit is detected by the OBD system and an improper connector is detected if - as shown in the diagram 6 - the coupling piece 4 not with the connecting piece 2 connected is. In this presentation you can see both snap hooks 28 ,

As explained, the shorting bridge 78 executed as a stamped bent part, wherein the with the front edge 76 provided end portion upwards, towards the pin-shaped actuator 80 is bent. In the contact area to the actuator 80 is the shorting bridge 78 then in turn bent by 90 °, so that a peripheral portion of the actuating element 80 and the contact bridge 78 run parallel. In this connection area 86 is the pin-shaped actuator 80 with the shorting bridge 78 connected. Following this, the shorting bridge is zigzag to a spring section 88 bent, which then on a side wall of the housing cover 52 is supported and thus the front edge 76 the shorting bridge 78 in contact with the contact edges 82 . 84 the contact sheets 58 . 60 biases. The actuator 80 is towards the guide bush 32 radially reset.

As explained, this guide bushing 32 on the housing cover 52 educated. In the present case are housing cover 52 and guide bush 32 executed in one piece, in principle, the guide bushing can also be recognized. The larger in the radial direction, in the connection area 86 arranged, part of the pin-shaped adjusting element 80 is in the housing cover 52 guided A radially recessed area of the control element 80 is sliding in the inner peripheral wall of the guide bushing 32 guided. In this area, there is also a seal via an O-ring 90 , A further tapered operating section 92 then extends into the mouth region of the guide bush 32 and arrives at the attachment of the coupling piece 4 to the connecting piece 2 in contact with the push button 30 , The relative position of the Schapphaken 28 and the recesses 26 is chosen so that the immersion depth of the actuating lever 30 in the guide bush 32 sufficient to the operating section 92 of the actuating element 80 move so far that the short circuit, as in 8th represented, is solved.

7 shows the coupling piece 4 in the view 4 with removed housing cover 52 , You can see the spring section in this area 88 the shorting bridge 78 and the connection area 86 in which the actuator 80 and the shorting bridge 78 connected to each other. This one, in the housing cover 52 Guided end portion of the actuating element 80 is as an approximately cuboid guide piece 94 formed, to which the stepped operating portion 92 is scheduled. This carries, as explained, the smaller O-ring 90 , which is inserted into an annular groove and is supported on a collar. The shorting bridge 78 is away from the leader 94 down to the two contact flags 72 . 74 angled the contact plates and is in the shorting position with its front edge 76 at the two contact edges 82 . 84 at.

When connecting coupling piece 4 with connection piece 2 dips the push-button 30 , as in 2 shown in the guide bush 32 one, leaving the actuator 80 , as in 8th recognizable, over the operating section 92 in the direction of the arrow against the force of the spring section 88 is moved. This is the shorting bridge 78 strained and taken away, leaving the front edge 76 from the two contact flags 72 . 74 takes off and the short circuit is canceled.

The cancellation of the short circuit, ie the state R ≈ 0 is detected by the OBD system. If necessary, it is now also possible to carry out resistance evaluation, in which case the "good condition" is recognized as the resistance of the PTC heater (ie, a consumer circuit) or as a fixed resistor (as a signal circuit). After applying the operating voltage, the blowby heater can then fulfill its function properly.

Prerequisite for the embodiment according to the 1 to 8th is that the two contact edges 82 . 84 are aligned with each other, so that the front edge 76 can be brought into contact. For this purpose, a relatively accurate production and assembly is required. This disadvantage can be eliminated by a modification as described in the 7a and 8a is indicated. The modification is that in the angled end portion of the shorting bridge 78 a slot 85 is formed, in the front edge 76 ( 8a ), so that two formed as spring tabs contact bridge sections 87 . 89 arise, each one a contact flag 72 respectively. 74 assigned. Due to the spring action of the contact bridge sections 87 . 89 Manufacturing tolerances or assembly deviations can be compensated, so that a sufficient contact between the shorting bridge 78 and the contact flags 72 . 74 is guaranteed.

The disadvantage described above is also in the following with reference to the 9 to 13 explained embodiment cleared.

First is in 9 recognizable that in this embodiment, the housing 36 of the coupling piece 4 is formed approximately cuboid and again a lower housing part 50 has that by means of a housing cover 52 is closed. The actuator explained in more detail below 34 is in this embodiment in the lower housing part 50 guided. Approximately parallel to the actuator 34 is on the lower housing part a stepped guide pin 96 designed as an anti-rotation during assembly of the coupling piece 4 with the connecting piece 2 acts. The latter is designed approximately cylinder jacket-shaped and has an approximately radially projecting side actuating plate 98 that a recess 100 has, in the stepped end portion of the guide pin 96 when dipping submits. As connecting means for the pipeline of the intake system is in the embodiment according to 9 on the pipe 10 and the plastic jacket 12 a rubber grommet 102 applied on the inner circumference 20 of the connecting piece is present. Its end position is on the coupling piece 4 through a stop ring 104 limited.

The rubber grommet 102 So met in this embodiment, the sealing function and the function of the mechanical attachment between coupling 4 and connecting pieces 2 ,

10 shows the coupling piece 9 with removed housing cover. As in the previously described embodiment, the PTC resistor 56 between the two contact sheets 58 . 60 layered. In this embodiment, only the contact plate has 58 a contact flag 74 , The shorting bridge 78 is again designed as a stamped and bent part, wherein the end portion as a spring portion 88 formed and on the inner wall of the housing base 50 is supported. Following the spring section 88 extends from the shorting bridge 78 a contact leg 106 approximately in the direction of the contact lug 74 , In the short-circuited position lies this contact leg 106 with its side edge 107 at the contact edge 82 the contact flag 74 at. The shorting bridge 78 is again along a connection area 86 with the guide piece 94 of the actuating element 80 connected. Following on from this guide piece 94 has the actuator 80 the operating section 92 passing through the guide bush 32 passed through. This guide bush 32 is in this embodiment, the lower housing part 50 trained and leads the actuator 80 ,

11 shows a section along the line CC in 9 through the housing 36 , In this section you can see the on the lower part of the housing 50 molded guide bushing 32 in which the with the O-ring 90 provided area of the actuating element 80 is guided. The slightly recessed actuating portion in the radial direction 92 cantilevers out of the bushing 32 towards the connection piece. The shorting bridge 78 is with her from the spring section 88 remote end portion down (view after 11 ) to a resilient contact end 108 Angled in the short-circuit position at an in 11 downwardly angled contact part 110 of the contact sheet 80 is applied. The contact end 108 dives into a groove between the guide piece 94 and in the guide bush 32 guided part of the control element 80 one.

When mating the coupling piece 4 and the connecting piece 2 according to 12 becomes the operation section 92 from the actuator plate 98 taken along and in the direction of arrow according to 13 emotional. In this mating also dives the guide pin 96 into the recess 100 a, so that connecting piece 2 and leader 4 are relatively positioned. By the emergence of the actuator plate 98 on the operating section 92 becomes the control element 80 shifted in the arrow direction, the contact end 108 the shorting bridge 78 taken along and the spring section 88 is tense. This lift the contact end 108 and the contact leg 106 from the contact part 110 or from the contact edge 82 the contact flag 74 off - the short circuit is canceled. An advantage of this solution is that an exact alignment of the contact edges is not required because the contact end 108 is resilient and thus compensates for tolerances.

Disclosed is a blow-by device with a coupling piece and a suction system-side connecting piece, wherein in the region of the coupling piece and / or the connection piece electrical contacts of an electrical load or signal circuit are formed. By applying a plug, this circuit can be activated. According to the invention, a short-circuiting bridge is provided which shorts the circuit when the coupling piece and connecting piece are not properly connected.

LIST OF REFERENCE NUMBERS

1

 Blow-by facility

2

 spigot

4

 coupling

6

 plug

8th

 connection

10

 pipe

12

 Plastic sheathing

14

 O-ring

16

 seal carrier

18

 sealing collar

20

 inner circumferential wall

22

 retaining sleeve

26

 recesses

28

 snap hooks

30

 confirmation pusher

32

 guide bush

34

 actuator

36

 casing

38

 plug collar

40

 locking lug

42

 guide rail

44

 guide collar

46

 snap tab

48

 catch projection

50

 Housing bottom

52

 housing cover

54

 PTC heating element

56

 PTC resistor

58

 contact sheet

60

 contact sheet

62

 spring shackle

64

 spring shackle

66

 retaining wall

68

 connector pin

70

 connector pin

72

 contact tag

74

 contact tag

76

 front edge

78

 Shorting

80

 actuator

82

 contact edge

84

 contact edge

85

 slot

86

 connecting area

87

 Contact bridge section

88

 spring section

89

 Contact bridge section

90

 O-ring

92

 actuating section

94

 guide piece

96

 spigot

98

 operating plate

100

 recess

102

 rubber grommet

104

 stop ring

106

 contact legs

107

 side edge

108

 Contact end

110

 contact part

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1164264 B1 [0002]
• EP 1375997 B1 [0002]
• DE 2432782 A [0006]
• EP 1314869 B1 [0006]
• DE 19518712 A1 [0006]
• US 4922882 [0007]
• US 4312121 [0007]
• EP 2418361 A2 [0009]
• DE 102010020844 [0013]

Claims (12)

Blowby device of an internal combustion engine, which with an intake system-side connecting piece ( 2 ), which with a coupling piece ( 4 ), is connected to a blowby line, is releasably connected, wherein in the region of the coupling piece ( 4 ) or the connecting piece ( 2 ) electrical contacts of an electrical load or signal circuit are formed by attaching a plug ( 6 ) are electrically connected to an electrical connection, characterized by a short-circuit bridge ( 78 ) which short circuits the load or signal circuit and which is controlled by an actuator ( 34 ) when connecting the coupling piece ( 4 ) with the connecting piece ( 2 ) is adjustable to cancel the short circuit. Device according to claim 1, wherein the actuator ( 34 ) a standing with the shorting bridge operatively connected and adjustable actuator ( 80 ), which is adjustable by attaching the coupling piece to the connection piece from a short-circuit position in the direction of an open position. Device according to claim 2, wherein the actuator ( 34 ) is spring biased toward the shorting position. Device according to one of the claims 2 to 3, wherein the actuating element ( 80 ) in a single or multi-part housing ( 36 ), in which the contacts and the shorting bridge ( 78 ) are received and that a plug collar ( 38 ) Has. Device according to one of the preceding claims, wherein the on the coupling piece ( 4 ) or on the connecting piece ( 2 ) arranged actuator ( 34 ) is assigned an arranged on the other component operating part, which when connecting coupling piece ( 4 ) and connecting pieces ( 2 ) the actuator ( 34 ). Device according to claim 5, wherein the actuating part is an actuating plate ( 98 ) or an actuating pushbutton ( 30 ). Device according to one of the preceding claims, with one in the region of the coupling piece ( 4 ) or the connecting piece ( 2 ) trained blowby heater, which is controlled via the consumer circuit. Device according to claim 7, wherein the heater is a PTC heating element ( 54 ) whose ceramic PTC resistor ( 56 ) via contact sheets ( 58 . 60 ) contacted by the shorting bridge ( 78 ) are short-circuited. Device according to claim 8, wherein the two contact sheets ( 58 . 60 ) Contact flags ( 72 . 74 ) whose parallel front edges as contact edges ( 82 . 84 ) are formed, which are short-circuited on the front side adjacent shorting bridge, said short circuit by lifting the shorting bridge ( 78 ) from the contact edges ( 82 . 84 ) can be canceled. Device according to claim 9, wherein a contact plate ( 58 ) a contact flag ( 74 ), which has a contact leg ( 106 ) at the shorting bridge ( 78 ) associated with a front edge ( 76 ) at a contact edge ( 82 ) of the contact lug ( 74 ) is brought into abutment, while the other contact plate ( 60 ) an angled contact part ( 110 ) at which a contact end ( 108 ) of the shorting bridge ( 78 ) lies flat in the short-circuited position. Device according to one of the preceding claims, wherein the shorting bridge ( 78 ) as a contact plate with a spring section ( 88 ) is formed, which is supported on the housing side. Device according to one of the preceding claims, wherein the housing ( 36 ) on the side of the coupling piece ( 4 ) is set.

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