FR3033382A1 - FLUID VALVE REGULATING ASSEMBLY - Google Patents

Abstract

The invention relates to a fluidic control assembly (1) for a valve (100) having at least three lanes, in particular for a motor vehicle, the assembly (1) comprising: - a mobile dosing element (12) arranged selectively opening or closing a first (2) of the three channels, - a movable switching element (10) arranged to selectively close a second (9) or a third (11) of the three channels, - an actuating device (15) two members (10, 12), which actuating device comprises an adjusting device (200) arranged to adjust the closed position of the metering member when the metering member is in the rest position.

Description

The invention relates in particular to a fluidic control assembly of a valve, in particular an engine control valve, provided with a metering flap and a switching flap. . The metering flap is generally pivotable in a first way to vary the gas flow section, and the switch flap is designed to rotate between a first shutter position of a second path and a second position of shutter of a third way. Such a valve may, for example, be placed in an EGR (Exhaust Gas Recirculation) gas loop downstream of a cooler, the metering flap regulating the gas flow rate in said loop, and the flap of switch is able to close, either an access path to said cooler, or a bypass channel bypassing the cooler.

The valve may comprise a metering flap and a switch flap controlled by an improved actuation mechanism of said flaps. Patent application FR3,004,503 describes such a valve. The invention aims to improve this type of valve.

The subject of the invention is thus a fluidic control assembly for a valve having at least three lanes, in particular for a motor vehicle, the assembly comprising: a mobile metering device arranged to selectively open or close a first of the three lanes, a movable switching member arranged to selectively close off a second or third of the three channels; a device for actuating the two members, which actuating device comprises a setting device arranged to adjust the closed position of the dosing member when the valve is in the rest position.

Thus, the invention makes it possible to overcome an uncertainty as to the closed or closed position of the dosing member, which uncertainty is due to manufacturing tolerances which may affect different parts of the fluidic control assembly. Improper closing (or clogging) of the dosing device can cause undesirable leaks. The invention makes it possible to correctly adjust the closed position of the dosing member.

In an exemplary implementation of the invention, the adjusting device comprises a lever having at its two ends two joints, and the adjusting device is arranged to allow the adjustment of the distance between these two joints. The adjusting device advantageously comprises at least one hinge formed at least with the aid of an eccentric member arranged to allow adjustment of the position of the hinge. Preferably, the adjusting device comprises a lever, in particular in the form of a connecting rod, comprising a housing for accommodating the eccentric member.

The eccentric member may be formed by a separate part of the lever, and attached to this lever. Advantageously the eccentric member comprises a circular outer periphery and a circular opening eccentric with respect to the center of the outer circular periphery.

The eccentric opening of the eccentric member is arranged to cooperate with a hinge pin. If desired, the circular outer circumference of the eccentric member matches the housing of the lever which receives this eccentric member. The eccentric member is advantageously arranged to be mounted in the housing in a desired angular orientation.

If desired, the eccentric member is arranged so that once permanently mounted in the housing, the eccentric member is locked in rotation in the housing. In an exemplary implementation of the invention, the eccentric member 5 is inserted into force in the housing of the lever. Alternatively, the eccentric member is glued, welded or crimped into the housing of the lever. The eccentric member comprises for example reliefs arranged to cooperate with complementary reliefs on the housing to block the relative rotation of the eccentric member relative to once the organ in the housing. At least one of the eccentric member and the housing comprises for example on its outer periphery reliefs, in particular grooves, to cooperate with the other of the eccentric member and the housing to prevent inadvertent relative rotation. The eccentricity of the eccentric opening relative to the outer periphery is preferably chosen to also take account of manufacturing tolerances, being for example at least 0.5 mm, for example close to 1 mm.

The eccentric member is made in particular of plastic, bronze, steel or stainless steel. In an exemplary implementation of the invention, the assembly being arranged so that, in a first operating range, the actuating device actuates the switching member 25 while leaving the organ of still dosage. The actuating device may comprise at least one return member, in particular an elastic return member, in particular a return spring, for example a torsion spring, for biasing the dosing member and the switching member in a rest position.

In particular, the actuating device comprises a guiding member capable of actuating the dosing member, this guiding member 3033382 being capable, in the first operating range, of moving while leaving the dosing member motionless. , the guide member can in particular be coupled to an actuating wheel, and the actuating device comprises an interface member (21), in particular in the form of a crank, coupled to the dosing member , and the guide member comprises a delay device arranged so that, in the first operating range, when the guide member is moved, it moves relative to the interface member without actuating the interface member.

The delay device preferably has an elongate cavity forming part of the associated hinge. In a variant, the actuating device is devoid of a delay device. The invention also relates to a method of manufacturing an assembly as defined above, comprising the step of mounting the eccentric member on the lever when the dosing member is held in closed position, including temporarily using a screen. When the fluidic regulation assembly comprises a delay device, the method advantageously comprises the following steps: Use a first tool to hold the dosing member in the closed position, Use a second tool to hold the drive wheel in a closed end position by the switching member of one of the tracks, - Put in place the lever with the bottom of the oblong cavity resting on the pin forming articulation with the interface member, it is the bottom that is closest to the other articulation of the lever, 30 - Insert the eccentric member in the housing.

When the fluidic control assembly is devoid of delay device, the method comprises the following steps: - Use a first tool to keep the metering member in the closed position, 5 - Use a second tool to hold the wheel drive in a position to align its axis of rotation with the hinge pins at the ends of the lever, - Fit the lever, - Insert the eccentric member in the housing.

The fluidic control assembly may be arranged so that, in a first operating range, the actuating device actuates the switching member while leaving the dosing member stationary.

Thus, advantageously, the opening section in the first channel, at the level of the dosing member, is kept constant during the actuation of the switching member. The flow rate of the fluid flowing in the valve is thus kept constant during the selection of one of the second and third channels.

For the purposes of the present application, the term "closure" means a total filling or a quasi-total filling. A total shutter corresponds to a shutter in which no fluid passes. An almost total closure corresponds to a closure in which a residual flow can occur in particular due to a set of operation of the dosing or switching member. The assembly can be arranged so that in the first operating range, the metering member is immobilized in a closed position of the first channel. The assembly can be arranged so that in the first range, the switching member simultaneously opens the second and third channels.

Thus, in the first operating range, leakage at the dosing member can be avoided during actuation of the switch member. In an exemplary embodiment, the assembly can be arranged in such a way that the switching member simultaneously opens the second and third channels in a second operating range greater than the first range and including this first range. The assembly can be arranged so that in the second operating range, the actuating device actuates the dosing member. In other words, in the second operating range, the metering member is in an open position of the first channel. The first range may be at least 20% of the second range, in particular at least 50%, for example at least 80% of the second range. Such an assembly allows to begin to perform a dosage of the first path before the switching member has closed one of the second and third ways. Alternatively, the assembly may be arranged such that the dosing member is stationary in a second operating range larger than the first range and including the first range. The assembly can be arranged so that in the second operating range, the switching member is stationary.

For example, in the second operating range, the switching member may close one of the second and third channels. The first range may be at least 20% of the second range, in particular at least 50%, for example at least 80% of the second range.

Thus, leaks at the dosing member can be avoided during actuation of the switch member. Such an assembly 3033382 7 makes it possible to begin to perform a dosage of the first channel after the switching member has closed one of the second and third channels. This allows precise dosing of the second channel despite possible uncertainties on the position of the dosing and switching elements in the fluid control assembly. In another variant, the assembly may be arranged in such a way that the dosing member is stationary in a second operating range equal to the first range and in such a way that the switching member is stationary in the second region. operating range.

For example, in the second operating range, the switch member may close one of the second and third channels. Thus, leaks at the dosing member can be avoided. Such an assembly allows precise dosing and improves the dosage range. In other words, the dosage is accurate as soon as one of the second and third lanes is closed. In all the preceding examples, the assembly may be arranged so that outside the second operating range, the actuating device actuates the dosing member while leaving the switching member stationary.

The assembly can be arranged so that outside the second operating range, the switching member closes one of the second and third channels. Thus, apart from the second operating range, the assembly allows the dosing of one or the other of the second and third channels. The assembly can be arranged so that in the rest position, the dosing member closes the first channel and the switching member opens the second and third channels. The assembly can be arranged so that in the rest position, the switching member opens at maximum each of the second and third channels.

The actuating device may comprise at least one actuating wheel rotatable for the common actuation of the dosing member and the switching member. Advantageously, the actuating device can be configured so that the rotation of the actuating wheel while the dosing member and the switching member are in the rest position leads to: for a first direction of rotation of the actuating wheel (16), the actuation of the switching member until it closes the second way, and 10 for a second direction of rotation of the actuating wheel, to the actuation of the switching member until it closes the third way. In other words, the actuating device is capable, with a single actuating wheel, of selecting one of the second and third channels for switching the fluid by actuating the actuator wheel in one direction or in one direction, respectively. other direction of rotation from the rest position. The actuating device can be adapted, outside the second operating range, to immobilize the switching member 20 in one or the other of the closure positions of the second or third track while the wheel the actuator continues a unidirectional rotation movement from the rest position. The actuating device may comprise a guide member capable of actuating the dosing member, this guide member 25 being able, in the first operating range, to move while leaving the dosing member stationary. Advantageously, the guiding member can move according to a movement composed of rotation and translation. The guide member may be coupled to the actuating wheel.

The actuating device may comprise an interface member coupled to the dosing member.

The guide member may comprise a delay device arranged so that, in the first operating range, when the guide member is moved, it moves relative to the interface member without actuating the device. interface member.

For example, the actuating device may comprise an interface member coupled to the dosing member, the guide member having a delay device arranged in such a way that, in the first operating range, when the the guide member is moved, it moves relative to the interface member without actuating the interface member. For example, the delay device may be made at one end of the guide member, in particular the end cooperating with the interface member. The delay device makes it possible to keep the metering member stationary in the first operating range, despite the displacement of the switching member. Thus, although using a single actuating wheel for the common actuation of the dosing member and the switching member, the dosing member can remain stationary while the switching member is operated.

The assembly can be arranged in such a way that, when the guiding member is moved to open the first channel, while moving, the guiding member actuates the interface member against the return force exerts the return member on the dosing member. The assembly can be arranged in such a way that, when the guide member is moved to close the first channel, while moving, the guide member allows the interface member to be recalled by the return member to the rest position. The delay device and the interface member can slide cooperatively.

Sliding can be in a first direction when the actuating wheel rotates in the first direction of rotation.

The sliding may be in a second direction opposite to the first direction when the actuating wheel rotates in the second direction of rotation. The delay device may include a cavity and the interface member may include a pin extending into the cavity to allow the pin to slide within the cavity. The cavity may be oblong to allow movement of the pin in the direction in which the cavity extends. The cavity may comprise a plating spring, said spring exerting a force on the pin, such as to press the pin against the first inner edge, at least when the assembly is outside the first operating range. The guide member may comprise a first lever and a second lever articulated in rotation between them via a common end. Alternatively, the first lever may comprise another end cooperating with a pivot with the actuating wheel, the second lever comprising the delay device. The effect of such a guide member is to play the role of a crank-rod system for pivoting the metering member in the same direction of rotation from its closed position of the first path regardless of the direction of rotation of the actuating wheel. With the actuating device in the rest position, the first and second levers can be aligned along their longitudinal axis. The common end of the first and second levers, the pivot and the pin may be aligned when the actuating device is in the rest position. Advantageously, the actuating device may comprise a system for actuating the switching member, said actuating system comprising a guide piece and an interface piece, the actuating wheel being coupled to the guide piece and the switching member being coupled to the interface piece, the guide piece cooperating with the interface piece to rotate the switch member. The actuating device can be arranged so that the rotation of the actuating wheel while the actuating device is in the rest position, leads to the actuation of the dosing member in one and the same direction. rotation, regardless of the direction of rotation of the actuating wheel. The invention also relates to a three-way valve, in particular for a motor vehicle, comprising: a body delimiting a first channel, a second channel and a third channel, the channels opening into a common interior space, an arranged mobile metering device to close the first channel, a movable switching member arranged to selectively close the second or third of the three channels, a common actuating device of the two members, the valve being arranged so that, in a first range In operation, the actuating device actuates the switching member 20 while leaving the dosing member stationary. Preferably, the valve may be placed in an EGR loop comprising a cooler and a bypass channel bypassing said cooler, the metering member regulating the gas flow in said EGR loop and the closing switching member, being a channel of access to said cooler, or said bypass channel. The EGR loop can be a high pressure or low pressure loop. The following is a detailed description of embodiments of a fluidic control assembly of a valve according to the invention, with reference to FIGS. 1 to 14.

FIG. 1 is a schematic view of a low-pressure EGR loop in which the valve can be used. FIG. 2 is a diagram showing the angular position of the metering flap and the switch flap as a function of the angular position. FIG. 3 is a perspective view of the fluidic control assembly according to the invention. FIGS. 4, 6, 8 and 10 are four bottom views of the fluidic control assembly of FIG. a valve according to the invention at four different stages of rotation of the actuating wheel, in the same direction of rotation from the rest position of the flaps of the fluidic control assembly, FIGS. 5, 7, 9 and 11 are four views from above, respectively representing the fluidic control assembly according to FIGS. 5, 6, 8 and 10, FIG. 12 is a schematic and partial view of an exemplary embodiment of the device for delaying the organ. guiding the action device FIG. 13 is a schematic and partial view of a lever of the assembly of FIG. 1, and FIG. 14 is a diagrammatic and partial view of an assembly of the fluidic control assembly according to the invention. according to another exemplary embodiment of the invention, FIGS. 15 and 16 illustrate various steps of assembly methods.

Referring to FIG. 1, a valve 100 according to the invention is a low pressure EGR valve placed on an EGR loop connecting an exhaust line 3 downstream of a turbine 4 to an intake circuit 5. fresh air upstream of a compressor 6, the turbocharger 4.6 being moreover conventionally connected to a heat engine 7. The EGR loop comprises the valve 100, a cooler 8 of the EGR gas and a bypass channel 9 of said gas originating upstream of said cooler 8 and opening into an outlet 2 of the EGR loop, downstream of this cooler 8. The valve 100 is a three-way valve comprising a body delimiting the channels 2, 9 and 11, these three pathways opening into a common interior space. The valve 100 has a fluidic control assembly 1 according to the invention. The fluidic control assembly 1 comprises a metering flap 12 rotatable about an axis 13, said metering flap 12 regulating the passage section of the gases in the channel 2 and therefore in the EGR loop. The fluidic control assembly 1 also comprises a switching shutter 10 movable in rotation about an axis 14, between a closed position of the bypass channel 9 and a closed position of a passage 11 of FIG. access to the cooler 8. The fluidic control assembly 1 further comprises a common actuating device 15 for controlling the rotational movement of the two flaps 10,12.

FIG. 3 represents a perspective view of the fluidic control assembly 1 of the valve 100 according to the invention. In the example considered, the common actuating device 15 of the two flaps 10, 12 comprises an actuating wheel 16, able to be rotated in both directions by means of an electric motor 50 engraining on a pinion. intermediate 51, the intermediate gear 51 engraining on the wheel 16 of actuation. The direction of rotation of said wheel 16 is dictated by the shutter position that is to be assigned to the shutter 10. This wheel 16 controls both the pivoting of the metering flap 12 and the pivoting of the shutter. switching 10 according to a synchronized kinematics.

In the example considered, the actuating device 15 comprises a torsion spring 18, to return the two flaps 10, 12 in a rest position. The actuating device 15 further comprises a guide member 22, 24 capable of actuating the metering flap 12. The actuating device 15 further comprises an interface member 21, in particular in the form of a This interface member 21 is, in this example, a crank mounted at one end of the axis 13 of the flap 12 and cooperating with the guide member 22, 24. in order to allow the metering flap 12 to pivot. In the example described, the guiding member 22, 24 comprises a delay device 60. In the example described, the delay device 60 is formed at the end. of the guiding member 22 cooperating with the interface member 21. The delay device 60 comprises an oblong cavity and the interface member 21 comprises a pin 63 extending into the cavity, to allow the peg to slide inside the cavity. The guide member 22, 24 comprises a first lever 24 and a second lever 22 articulated in rotation between them, via a common end, the first lever 24 comprising another end coupled with the actuating wheel 16 and the second lever. 22 comprises the delay device 60. The second lever 22 and the oblong cavity extend along the same axis. In the example described, the actuating device 15 further comprises an actuating system of the shutter 10. This actuating system comprises a guide piece 32, an interface piece 26 and a holding piece 33 of the interface piece 26. The holding piece 33 and the guide piece 32 are coupled with the actuating wheel 16. The interface piece 26 is coupled to the switching flap 10. The guide piece 32 cooperates with the interface piece 26 to pivot the switch flap 10. The actuating wheel 16 cooperates with the guide piece 32 25 by a first face of the wheel 16 and the actuating wheel 16 is in position. view of the common end of the first 24 and second 22 levers of the guide member 22,24 by a face opposite to the first face of the wheel 16. The interface piece 26, the guide piece 32 and the workpiece 30 are located opposite a first face of the actuating wheel 16. The crank 21 and the levers 24 and 22 are located opposite a second face, opposite to the first face, of the actuating wheel 16. A blind groove 28 is provided in the interface piece 26 and the guide piece 32 rests in the blind groove 28 at least 5 when the switch flap is in the rest position. When the guide piece rests in the blind groove 28, it thus exerts, under the effect of a rotation of the actuating wheel 16, a thrust on the interface piece 32 to actuate the switch flap 10. The holding piece 33 and the interface piece 26 comprise complementary surfaces, so that the cooperation between these complementary surfaces holds the interface piece 26 in position during a displacement of the guide piece 32, whereas the shutter 10 closes the bypass channel 9 or the passage 11. The fluidic control assembly 1 of the valve 100 is shown in a configuration in which the angular position of the actuating wheel 16 is about 130 °. This position is referenced in FIG. 2 by the letter D. In this angular position, the switching flap 10 is in the closed position of the track 11 and the metering flap 12 has an angular position of approximately 40 °, that is to say that this flap 12 partially opens the track 2. FIG. 2 represents: in the ordinate, the angular position of the metering flap 12 and the switch flap 10, in the abscissa, the angular position of the actuating wheel 16.

The curve 60 represents the angular position of the switching flap 10 and the curve 62 represents the angular position of the metering flap 12. The different angular positions of the metering flap 12 and the flap 10 represented in FIGS. are thus visible on the curves of FIG. 2, namely: the rest position A as represented in FIGS. 4 and 5, for an angular position of 0 ° of the actuating wheel 16, the position B such as 6 and 7 for an angular position of 45 ° of the actuating wheel 16, the position C as represented in FIGS. 8 and 9 for an angular position of 60 ° of the actuating wheel 16; position D as shown in Figure 3 for an angular position of 130 ° of the actuating wheel 16, the position E as shown in Figures 10 and 11 for an angular position of 170 ° of the actuating wheel 16 In the rep position os A, the metering flap 12 is in the closed position of the exit channel 2 of the EGR loop (angular position of 0 °) and the switch flap 10 is in a position in which it does not obstruct the lane 9 and lane 11 (angular position of 0 °). In this rest position A, the actuating wheel 16 has an angular position of 0 °. From the rest position A of the actuating device 15, a rotation of the actuating wheel 16 in a first direction (to reach 199 °) or in a second direction opposite to the first direction 20 (to reach - 148 °) causes: a pivoting of the metering flap 12 always in the same direction and marked by a positive maximum angular position of about 75 °, a pivoting of the switch flap, to respectively -30 ° or 30 °.

In other words, regardless of the direction of rotation of the wheel 16 from the rest position A, the metering flap 12 always pivots in the same direction with an amplitude of about 75 ° from the position in which it closes the track 2 and the switch flap 10 pivots in a first direction or in a second direction, to close off one or the other of the lanes 9 and 11.

The curves 60 and 62 define a first operating range 71, in which the actuating device 15 actuates the switch flap 10 while leaving the dosing flap 12 stationary. Indeed, in this operating range 71, the dosing flap remains in the closed position of the track 2 (angular position of about 0 °) and the switch flap 10 rotates about an angular position 30 ° to about -30 °. The switching flap 10 does not close either the track 9 or the track 11 only in the first operating range 71. In other words, apart from the first track 71, the switching flap 10 closes one of them. lanes 9 and 11.

Outside the first range 71, the metering flap does not close track 2 and pivots to vary the fluid passage section in track 2. In the first operating range 71, the actuating wheel rotates. with an amplitude close to 120 ° and the rest position A is included in the first operating range 71.

In the rest position A, the switch flap is in a central position in which each of the channels 9 and 11 is open to the maximum. Position B is included in the first operating range 71. In this position B, the metering shutter 12 is in a closed position of the track 2 and the switching flap is in a position in which the track 11 The position C is within the first operating range 71. This position is that taken by the actuating device just before exiting the first operating range 71. In this position C, the shutter 10 is almost in the closed position of the channel 11 and the metering flap 12 is always in the closed position of the channel 2. The positions D and E are outside the first operating range 71. In these positions, the metering flap opens the channel 2 and the switch flap closes the channel 11.

Figures 4, 6, 8, 10 (for bottom views) and 5, 7, 9 and 11 (for top views, respectively) illustrate the fluidic control assembly 1 at four different stages, starting from the rest position A in Figure 4 to arrive at the position E in Figure 11, the wheel 5 actuating 16 rotating in the direction shown in the arrow 23 of Figures 6, 8 and 10. This direction of rotation is that which is taken by observing the actuating wheel 16 on the bottom views. The rotation of the actuating wheel 16 rotates the lever 24 and the guide piece 32.

The actuating wheel 16, the lever 22, the crank 21, the lever 24 and the metering flap 12 are placed in space and are arranged relative to each other, so that the rotation of the actuating wheel 16, in one direction or the other, causes the lever 24 to move the lever 22 relative to the crank 21 in the same direction, causing the oblong cavity to move relatively The switch flap 10 is rotated by means of a "Maltese cross" mechanism, the principle of which is based on discontinuous rotation of a Maltese cross-shaped object using 20 of a continuous rotation of a driving part interacting with said object. In the context of the invention, the object in the form of Maltese cross is the interface piece 26, which has been secured to the flap 10. This interface piece 26 comprises two parallel arms 27 between them the groove 28 defining a guide path, as will be seen later, and two lateral projections 29, each of said protrusions 29 being placed on each side of the longitudinal axis of the groove 28. An arm 27 and a protuberance 29 placed of the same relative to the longitudinal axis of the groove 28 are connected to each other by an arcuate surface 30. The interface piece 26 has a base 31 aligned with the longitudinal axis of the groove 28. the groove 28, the axis connecting the two protrusions 29 separating said base 31 and the two arms 27. In this manner, each arm 27 has an end implanted in the base 31, and another end which is free. The flap 10 has an axis of rotation 14 enabling it to pivot between the two closed positions of the two channels 9, 11, the interface piece 26 being fixed to one end of the flap 10 via said base 31 More specifically, the interface piece 26 is fixed to the flap 10 so that the base 31 of the interface piece 26 is traversed by the axis of rotation 14 of the flap 10. Thus, the rotation of the interface piece 26 simultaneously causes the rotation of the flap 10 about its axis of rotation 14 and the interface piece 26 with the same angle. The guide piece 32 is here a pin attached to the actuating wheel 16 on which cooperates in the example described a ball bearing. The lug 32 is for example cylindrical and placed at the periphery and emerges from the plane of the actuating wheel 16 in a perpendicular direction. The holding piece 33 is here a fraction of another wheel coaxial with the actuating wheel 16, and is integral therewith. This other wheel 33 is disposed in the central zone of the actuating wheel 16. The other wheel 33 emerges from the plane of the wheel 16 in a perpendicular direction, and thus creates an extra thickness. The cross section of the other wheel 33, which is perpendicular to its axis of rotation, has a circular contour on more than half of its circumference, and a recess delimited by a curved section connecting the partial circular contour to close said section.

Figures 4 and 5 illustrate the actuating system 15 while the flaps 10, 12 are in the rest position A. The pin 32 of the actuating wheel 16 is positioned at the bottom of the groove 28. Both arm 27 of the interface piece 26 then occupy the hollow left vacant by the retaining piece 33, their free end 30 coming off the curved section of said retaining piece 33.

The levers 22 and 24 are aligned. The metering flap 12 is returned to the closed position of the track 2 by the return spring 18. The peg 63 is located at one end of the cavity, a first interior edge of the cavity being at a distance from the peg 63 and a the second inner edge being close to the pin 63. The pin 63 and the second inner edge may leave a clearance to allow adjustment of the parts during assembly of the assembly 1. The switch flap 10 is in a position opening to maximum lanes 9 and 11.

Referring to FIGS. 6 and 7, when the wheel 16 is rotated, in the materialized direction, for the bottom view, by the arrow 23, from the rest position, the pin 32 causes the in rotation of the interface piece 26 and thus of the switching flap 10 which is secured thereto, by exerting a thrust on one of the two arms 27 bordering the groove 28. The rotation of the actuating wheel 16 causes in addition in rotation the lever 24 which causes the movement of the lever 22. The pin 63 slides inside the oblong cavity 62 so that the crank 21 remains stationary. As a result, the dosing flap 12 remains in the closed position of the channel 2.

Referring to Figures 8 and 9, the flap 10 reaches the closed position of the channel 11 and the metering flap 12 remains in the closed position of the track 2. The pin 63 is based on the first inside edge of the cavity. The crank 21 remains stationary and the metering flap 12 remains in the closed position of the track 2.

Referring to FIGS. 10 and 11, once the switch flap 10 has reached its closed position of the track 11, the actuating wheel 16 can continue its rotation so that a segment 30 in an arc of the interface piece 26 bears against the retaining piece 33, and more specifically against the outer surface 30 of the cylindrical portion of said piece 33. This retaining piece 33 helps to maintain the flap. 10 to a closing position of the track 11, bearing against an arcuate segment 30 of the interface part 26. The rotation of the actuating wheel 16 continues to cause rotation lever 24 which continues the movement of the lever 22. The pin 63 causes the rotation of the crank 21 and 5 so the metering flap 12 which is secured to it, exerting a thrust on the first inner edge of the cavity. The metering flap 12 is here shown while it has an angular position of about 70 °. The rotation of the actuating wheel 16 can continue, always in the same direction, until the metering flap 12 reaches a maximum open position to allow the exhaust gases to pass into the track 2 with maximum flow. Thus, the adjustment of the degree of opening of the metering flap 12 is effected by a pivoting of said metering flap 12 controlled by the actuating wheel 16, while the flap shutter 10 remains in a closed position of At any time, the actuating wheel 16 can be rotated in the opposite direction to adjust the open position of the metering flap 12 by reducing the flow of gases in the track 2. The position maximum opening of the metering flap 12 is reached when the flap 12 reaches an angular position of 75 °. This position is reached when the actuating wheel 16 comes into abutment, for example, on a not shown stopper. The actuating wheel 16 can also be rotated in the opposite direction to the direction shown by the arrow 23 of FIGS. 6, 8 and 10.

If the switching flap is in the closed position of the channel 11, for example as in the position E shown in FIGS. 10 and 11, a rotation of the actuating wheel 16 in the direction opposite to the direction embodied by FIG. arrow 23 causes rotation of pin 32 and lever 24. The pin thus rotates in the direction allowing it to return to groove 28. Lever 24 causes movement of lever 22. The first inner edge of cavity 62 then exerts a push on the pin 63 3033382 22 lower than the thrust exerted by the return spring on the metering flap 12. As a result, the flap 12 is actuated by the return spring 18 to reduce the section of the gas passage in the track 2. The rotation of the actuating wheel 16 can continue 5 in the same direction of rotation so that the metering flap 12 closes the track 2. The assembly then arrives in the position C. The wheel actuation 16 then continuing its rotation in s the same direction, the lug 32 enters the groove 28 and causes the rotation of the interface piece 26 and therefore the switching flap 10 which is integral with it, exerting a thrust 10 on one of the two arms 27 bordering the groove 28. The pin 63 slides in the cavity 62 since the metering flap 12 is held in the closed position of the track 2 by the return spring 18 and the lever 22 continues its movement. The rotation of the actuating wheel 16 can continue in the same direction of rotation so that the metering flap 12 closes the track 2 and the switch flap 10 opens the channels 9 and 11 to the maximum. then arrives in the rest position A in Figures 4 and 5. All that has been described above concerning the pivotal kinematics of the shutter 10 to close the channel 11, 20 also remains valid when said flap 10 closes the way 9, that is to say when the actuating wheel 16 rotates in the opposite direction to that of the arrow 23 in Figure 6 while the assembly 1 is in the rest position. The pivotal kinematics of the metering flap 12 also remain valid.

Referring to Figure 12, the cavity 62 includes a leaf spring 61, the spring 61 exerting a force on the pin 63 so that the pin is pressed against the first inner edge of the cavity. This plating of the pin allows, in addition to the force exerted by the return spring 18 on the flap, to define a single position for the flap, in particular when the displacement of the lever 22 is such that no force is exerted by the second inner edge of the cavity on the counter 63.

The lever 22 is described above very schematically. The lever 22, in particular with reference to FIG. 13, will now be described in more detail. The fluidic control assembly 1 comprises: In addition to the metering member 12, in addition to the switching member 10, the device actuator 15 of the two members, which actuating device 15 comprises an adjusting device 200 arranged to adjust the closed position of the dosing member 12 when the valve is in the rest position, namely when said dosage and the switching member are in the rest position.

Thus, the invention makes it possible to overcome an uncertainty as to the closed or closed position of the metering flap 12, which uncertainty is due to manufacturing tolerances which may affect different parts of the fluidic control assembly.

Improper closing (or clogging) of the dosing member can cause undesirable leaks. The invention makes it possible to correctly adjust the closed position of the dosing member. As illustrated in Figure 4, the adjusting device 200 comprises the lever 22 having at its two ends two joints 201 and 202, and the adjusting device 200 is arranged to allow the adjustment of the distance between these two joints. The hinge 202 is formed using an eccentric member 205 arranged to allow adjustment of the position of the hinge 202, as can be seen in FIG. 13.

The lever 22, in the form of a connecting rod, comprises a housing 206 for housing the eccentric member 205. The eccentric member 205 is formed by a separate part of the lever 22, and attached to this lever.

The eccentric member 205 comprises a circular outer circumference 207 and a circular opening 208 eccentric to the center of the outer circular periphery 207. The eccentric opening 208 of the eccentric member 205 is arranged to cooperate with a hinge pin 17 as shown in FIG. 3. The circular outer circumference 207 of the eccentric member 205 matches the housing 206 of the lever 22 which receives this eccentric member 205. The eccentric member 205 is arranged to be mounted in the housing 206 in accordance with a desired angular orientation. Three angular orientations are illustrated in Figure 13. The eccentric member 205 is arranged such that once permanently mounted in the housing 206, the eccentric member is locked in rotation in the housing. The eccentric member 205 is forcibly inserted into the housing of the lever. Alternatively, the member 205 is glued into the housing 206 of the lever. The eccentric member 205 may comprise reliefs arranged to cooperate with complementary reliefs on the housing 206 to block the relative rotation of the eccentric member 205 relative to the member in the housing. At least one of the eccentric member 205 and the housing 206 comprises for example on its outer periphery reliefs, in particular grooves, to cooperate with the other of the eccentric member and the housing to prevent inadvertent relative rotation. .

The eccentricity of the eccentric opening relative to the outer periphery 207 is chosen to also take account of manufacturing tolerances, for example being at least 0.5 mm, for example close to 1 mm.

The eccentric member 205 is made in particular of plastic, bronze, steel or stainless steel. In the example described, the assembly 1 comprises the delay device 60, as illustrated in FIG. 12. In a variant, the actuating device is devoid of a delay device, as illustrated in FIG. between the lever 22 and the part 21 is a purely pivot joint, without delay effect. When the fluidic control assembly comprises a delay device 60, the method of manufacturing the fluidic unit advantageously comprises the following steps (see FIG. 15): - Using a first tool to keep the dosing member in the closed position (Step 301), - Use a second tool to hold the drive wheel 20 in a closed end position by the switching member of one of the tracks (step 302), - Put in place the lever 22 with the bottom of the oblong cavity 62 bearing on the pin 63 forming articulation with the interface member 21, it is the bottom which is closest to the other articulation 17 of the lever 22 (step 303) - Insert the eccentric member 205 in the housing (step 304). When the fluidic control assembly is devoid of a delay device, the method comprises in particular the following steps (see FIG. 16): Use a first tool to hold the dosing member in the closed position (step 310), 303 3 82 26 - Use a second tool to hold the drive wheel 16 in a position to align its axis of rotation with the hinge pins at the ends of the lever 22 (step 311), - Set up the lever 22 (step 312), - Insert the eccentric member 205 in the housing (step 313).

Claims (12)

REVENDICATIONS1. Fluidic regulation assembly (1) of a valve (100) having at least three lanes, in particular for a motor vehicle, the assembly (1) comprising: - a mobile metering device (12) arranged to selectively open or close a first (2) three channels, - a movable switching member (10) arranged to selectively close a second (9) or third (11) of the three channels, - an actuating device (15) of the two bodies (10). , 12), which actuating device comprises an adjusting device (200) arranged to adjust the closed position of the dosing member when the valve is in the rest position. 2. Assembly according to the preceding claim, the adjusting device (200) comprises a lever (22) having at both ends two hinges (201, 202), and the adjusting device is arranged to allow the adjustment of the distance between them. two joints. 3. Assembly according to one of the preceding claims, the adjusting device (200) comprising at least one joint formed at least with an eccentric member (205) arranged to allow adjustment of the position of the joint . 4. Assembly according to the preceding claim, the adjusting device (200) comprises a lever (22), in particular in the form of a connecting rod, comprising a housing (206) for accommodating the eccentric member. 3033382 28 5. An assembly according to one of claims 3 and 4, the eccentric member (205) being formed by a separate piece of the lever (22), and attached to the lever (22). 5 6. An assembly according to one of claims 3 to 5, the eccentric member comprising a circular outer periphery (207) and a circular opening (208) eccentric with respect to the center of the outer circular periphery. 10 7. Assembly according to one of claims 3 to 6, the eccentric member (205) being arranged to be mounted in the housing in a desired angular orientation. 8. Assembly according to one of claims 4 to 7, the eccentric member 15 being inserted into force in the housing of the lever (22), or is glued, welded or crimped in the housing of the lever (22). 9. Valve, in particular an EGR valve, comprising an assembly according to one of claims 1 to 8. 10. A method of manufacturing an assembly according to one of claims 1 to 8, comprising the step of mounting the eccentric member on the lever (22) when the metering member (12) is held in the closed position, notably temporarily with the help of a screen. 25 11. The method of claim 10, wherein the fluidic control assembly comprises a delay device, the method comprising the following steps: - Using a first tool to keep the dosing member in the closed position, 3033382 29 - Use a second tooling for holding the drive wheel in a closed end position by the switching member of one of the tracks, - setting up the lever (22) with the bottom of the oblong cavity 5 (62) resting on the pin forming articulation with the interface member (21), it is the bottom which is the closest to the other articulation (17) of the lever (22), - Insert the eccentric member in housing. 10 12. The method of claim 10, when the fluidic control assembly being devoid of delay device, the method comprising the following steps: - Use a first tool to maintain the dosing member in the closed position, 15 - Use a second tooling for maintaining the drive wheel in a position to align its axis of rotation with the hinge pins at the ends of the lever (22), - Put in place the lever (22), - Insert the eccentric member in housing. 20