Valve

Abstract

A valve for controlling at least one first flow of at least one fluid, in particular, within a motor vehicle, along a first fluid path from at least one valve inlet to at least one valve outlet, comprising at least one valve seat that is arrangedwith regard to the fluid flowbetween the valve inlet and the valve outlet, wherein the valve seat can be closed at least in some regions in at least one closed position by means of at least one valve member.

Claims

1. A valve (101) for controlling at least one first flow of at least one fluid, in particular, within a motor vehicle, along a first fluid path from at least one valve inlet (11) to at least one first valve outlet (17), comprising at least one valve seat (9) that is arrangedwith respect to the fluid flowbetween the valve inlet (11) and the valve outlet (17), wherein the valve seat (9) can be closed at least in some regions in at least a closed position, by means of a valve member (7, 107), characterized by at least one separation device (119) configured at least in some regions in the valve seat and/or the valve member (107), in order to separate out stains present in the fluid, wherein the fluid can be guided in the closed position along at least one second fluid path from the valve inlet to at least one other valve device (105, 112, 113, 118), and the separation device (119) is arranged at least in some regions in the second fluid path.

2. The valve according to claim 1, characterized in that the second fluid path runs at least in some regions through the valve member (107) and/or the valve seat.

3. The valve according to claim 1 of-2, characterized in that the valve device comprises at least in some regions at least one valve chamber, at least one control chamber (113), at least one control valve (105), at least one auxiliary valve (105), at least one three-way valve (105), at least one bypass line (in particular, fluidically connected to the valve outlet), at least one connection line (118) (such as a B2 line (112)), and/or at least one solenoid valve (105).

4. The valve according to claim 1, characterized in that the separation device (119) is configured at least in some regions as at least one insert that can be accommodated at least in some regions in the valve seat and/or the valve member (107) and/or can be fixed, preferably by means of bonding, welding, clipping, latching, bolting, clamping, or positive and/or non-positive locking connection.

5. The valve according to claim 1, characterized in that the separation device (119) comprises at least one inflow device (121) for the inflow of the fluid to be cleansed into the separation device (119), at least one outflow device (129) for the outflow of the at least partially cleansed fluid from the separation device (119), and/or at least one discharge device (137) for discharging stains that have been separated out from the fluid to be cleansed, wherein preferably at least the inflow device (121) and the discharge device (137) are configured at least in some regions as a single piece.

6. The valve according to claim 1, characterized in that at least one centrifugal separation device, at least one swirl separation device, at least one baffle plate separation device, at least one labyrinth separation device (127, 131, 133), at/or at least one cyclonic separation device be provided, preferably comprised by the separation device (119), in particular, arranged at least in some regions between the inflow device (121) and the outflow device (129), and/or operatively connected to the separation device, in particular, fluidically connected to the separation device.

7. The valve according to claim 5, characterized by comprising at least one elevation (123) surrounding the inflow device (121) at least in some regions.

8. The valve according to claim 5, characterized by at least one connection line (127) between the inflow device (121) and the outflow device (129), wherein, in particular, the connection line (127) forces at least one deflection (131) on the fluid, the connection line (127) having different cross-sections and/or cross-sectional shapes, the cross-section in the region of a deflection (131) preferably being reduced in comparison to a region (131) upstream and/or downstream of the deflection (131), wherein the change in cross-section is preferably continuous.

9. The valve according to claim 5, characterized in that the discharge device (137) comprises at least one discharge line (135), wherein the discharge line (135) runs at least in some regions inclined in the direction of gravity, the discharge line (135) is comprised by and/or formed of the connection line (127), at least in some regions, and/or the discharge line (135) is connected at least in some regions to the inflow device (121) and/or to the valve inlet.

10. The valve according to claim 5, characterized by a plurality of inflow devices (121), outflow devices (129), connection lines (127), discharge devices (137), and/or discharge lines (135), wherein, in particular, a plurality of inflow devices (121) open into at least one outflow device (129), at least one connection line, at least one discharge device, and/or at least one discharge line, and/or at least one inflow device and/or at least one connection line open(s) into a plurality of outflow devices, discharge devices, and/or discharge lines.

11. The valve according to claim 1, characterized in that the valve is configured as, in particular, electrical and/or pilot-operated overrun air recirculation valve (101).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features and advantages of the present invention arise from the following description, which describes preferred embodiments of the present invention with reference to schematic drawings.

[0030] In the drawings,

[0031] FIG. 1a illustrates a schematic cross-sectional view of a generic valve in a closed position;

[0032] FIG. 1b illustrates the valve of FIG. 1a in the open position;

[0033] FIG. 2a illustrates a perspective view of an overrun air recirculation valve according to the present invention;

[0034] FIG. 2b illustrates a view of the separation device of the valve of FIG. 2a;

[0035] FIG. 3 illustrates a side view of the overrun air recirculation valve of FIGS. 2a and 2b;FIG. 4 illustrates a cross-sectional view from a direction A of FIG. 3;

[0036] FIG. 5 illustrates a sectional view of the separation device of FIG. 4, from a direction B in FIG. 4;

[0037] FIG. 6a illustrates a schematic view of a flow simulation of a fluid flow through the separation device or into the overrun air recirculation valve of FIGS. 2 to 5;

[0038] FIG. 6b illustrates a view of the separation device of FIG. 3, from a direction C; and

[0039] FIG. 7 illustrates a graphic plot of the degree of separation of the overrun air recirculation valve according to the present invention.

DETAILED DESCRIPTION

[0040] FIG. 2a illustrates a perspective view of an overrun air recirculation valve 101. Those elements of the overrun air recirculation valve 101 that correspond to those of the overrun air recirculation valve 1 bear the same reference signs, but increased by 100. As can be seen, in particular, in FIG. 2a, a separation device 119 in the form of an insert having a labyrinth system is arranged in the region of the valve member 107, in particular, in an open space of the piston.

[0041] The separation device 119 comprises a total of three inflow devices 121. Elevations 123 are arranged in the region of the inflow device 121. The elevations 123 causes already a reduction in the amount of stains supplied to the separation device 119, because much of the stains crashes into the intermediate region 125 between the inflow device 121 and is separated out there so as to then flow back into the valve inlet region. As can be seen, in particular, in FIG. 2b, the inflow devices 121 open into connection lines 127, which in turn open into an outflow device 129.

[0042] FIG. 3 depicts a side view of the overrun air recirculation valve 101 of FIGS. 2a and 2b. As can be seen, in particular, in FIG. 3, the separation device 119 is entirely accommodated within the valve member 107.

[0043] FIG. 4 depicts a cross-sectional view from the direction A in FIG. 3. As can be seen in FIG. 4, the connection lines 127 each comprise two deflections 131. Starting from the inflow device 121, first the cross-section of the connection line decreases in the region from the inflow device 121 to the deflection 131. Thus, the connection line 127 has a reduced cross-section in the region of the deflection 131, causing the fluid to accelerate in this region and raising the degree of separation.

[0044] After passage through the deflection, the fluid enters an intermediate region 133 in which the cross-section is enlarged in comparison to the deflection 131. This calms the flow in this region, and simultaneously reduces the pressure loss occurring due to the separation device 119. Then, the fluid enters the second deflection region 131, which, in turn, has a reduced cross-section, in order to achieve an acceleration of the flow in this region. Then, after thus being cleansed, the fluid enters the inflow device 129 in order to there enter the control chamber through the valve member 107, the B2 line 112 via the control valve 105. As can be seen, in particular, in FIG. 5, which is a cross-sectional view from the direction B in FIG. 4, the blow-by that has been separated out in the separation device 119 is supplied back to the inflow device 121 via a discharge device 137 comprising a slope 135 in the connection line 127. Thus, the inflow device 121 also works at the same time as the discharge device. The blow-by that has been separated in the separation device flows therewith back into the region of the valve inlet and thus does not enter the interior of the valve 101, thereby increasing the failure safety.

[0045] FIG. 6a depicts a schematic representation of a simulation of flow of the fluid through the separation device and the B2 line 112. As can be seen in FIG. 6a, the fluid in the region of the separation device 119 flows at a maximum speed, in order to achieve the greatest possible separation out in the region of the separation device 119, in particular, the deflections 131. After passage through the separation device 119, the flow again loses speed. As can be seen in FIG. 6b, the fluid enters the outflow device 129 tangentially from the connection line 127. This, due to the alignment and shaping of the outflow device 129 in a circular direction, causes the fluid to be set into a rotational motion, producingalso in this regionfurther separation out of the stains due to the cyclone principle and the associated centrifugal forces, these stains then flowing into the outflow device 129 in order to be supplied through the separation device 119 back to the valve inlet.

[0046] Finally, FIG. 7 depicts a graphical representation of the degree of separation of the separation device 119 over the particle diameter at a constant flow rate. As can be seen from the distribution, a separation out with a degree of separation of more than 98% takes place, in particular, for particles from a particle diameter of 0.9 p.m.

[0047] The present invention thus provides a valve in which a separation device is integrated into a valve member or a piston of an overrun air recirculation valve in order to filter out or reduce the blow-by and other stains contained in the fluid before ingress thereof into the valve and, as a consequence of deposits in the interior of the valve, causes sooting or coking, with the risk of setting of moving parts of the valve. The separation device is especially advantageous in comparison to a filter system in that maintenance is avoided, because unlike with a filter the separation device need not be replaced or cleansed. In particular, the separation device comprises an insert that has one or more openings, as inflow devices, on the underside of the valve member, which is in contact with the inflowing medium or faces the valve seat. Then, the inflow devices may lie in different planes, and may also be arranged vertically as well as horizontally.

[0048] The features disclosed in the preceding description, in the drawings, and in the claims may be essential individually as well as in any combination for the embodiments in the various embodiments thereof.

LIST OF REFERENCE SIGNS

[0049] 1, 101 Overrun air recirculation valve [0050] 3, 103 Pneumatic valve [0051] 5, 105 Control valve [0052] 7, 107 Valve member [0053] 9 Valve seat [0054] 11 Valve inlet [0055] 12, 112 B2 line [0056] 13 Control chamber [0057] 15 Spring element [0058] 17 Valve outlet [0059] 18, 118 Line [0060] 119 Separation device [0061] 121 Inflow device [0062] 123 Elevation [0063] 125 Intermediate region [0064] 127 Connection line [0065] 129 Outflow device [0066] 131 Deflection [0067] 133 Intermediate region [0068] 135 Slope [0069] 137 Discharge device [0070] A, B, C Direction