Changeover valve
The invention proceeds from a changeover valve, in particular for an automatic transmission of a motor vehicle, having at least one closing means ( 11 ) which is arranged in a housing part ( 10 ) and which, in order to control a flow, can be guided into at least two valve seats ( 16, 17 ) and is arranged in a control duct ( 20 ) which is open exclusively toward a connection side ( 15 ) of the housing part ( 10 ). It is proposed that in a switched-off state, considered in an operating configuration, the closing means ( 11 ) adopts a defined initial control position ( 18 ).
1 - 11 . (canceled)
12 . A changeover valve for an automatic transmission of a motor vehicle, comprising:
a control plate,
at least two valve seats, and
at least one closing means which is arranged in the control plate, which, in order to control a flow, can be guided into the least two valve seats, and which is arranged in a control duct that is open exclusively toward a planar connection side of the control plate,
wherein in an operating configuration, in a switched-off state, the closing means adopts a defined initial control position, and
wherein the closing means serves to control the flow in at least three ducts which adjoin the planar connection side of the control plate.
13 . The changeover valve according to claim 12 , wherein the defined initial position, considered in the operating configuration, lies below a second control position of the closing means, and wherein, in the switched-off state, the closing means is held at least partially in the defined initial control position under the force of gravity.
14 . The changeover valve according to claim 13 , wherein, in the operating configuration, the control duct has at least one angle to the horizontal, and wherein, in its defined initial control position, the closing means bears against a lower valve seat in the control duct.
15 . The changeover valve according to claim 14 , wherein, in the operating configuration, in the second control position, the closing means bears against an upper valve seat in the control duct.
16 . The changeover valve according to claim 14 , wherein the control plate has at least one second duct in addition to the control duct, and wherein the control duct and the second duct are connected by a transverse duct in the control plate.
17 . The changeover valve according to claim 16 , wherein the transverse duct is formed by a bore.
18 . The changeover valve according to claim 16 , wherein the transverse duct is outwardly sealed off by a metal closing plate.
19 . The changeover valve according to claim 12 , wherein the defined initial control position corresponds to a rebound position.
20 . The changeover valve according to claim 12 , wherein the closing means is formed by a valve ball.
21 . The changeover valve according to claim 12 , wherein at least one of the valve seats is integrally formed on the control plate.
22 . The changeover valve according to claim 15 , wherein the control plate has at least one second duct in addition to the control duct, and wherein the control duct and the second duct are connected by a transverse duct in the control plate.
23 . The changeover valve according to claim 22 , wherein the transverse duct is formed by a bore.
24 . The changeover valve according to claim 17 , wherein the transverse duct is outwardly sealed off by a metal closing plate.
25 . The changeover valve according to claim 13 , wherein the defined initial control position corresponds to a rebound position.
26 . The changeover valve according to claim 14 , wherein the defined initial control position corresponds to a rebound position.
27 . The changeover valve according to claim 15 , wherein the defined initial control position corresponds to a rebound position.
28 . The changeover valve according to claim 13 , wherein the closing means is formed by a valve ball.
29 . The changeover valve according to claim 13 , wherein at least one of the valve seats is integrally formed on the control plate.
30 . The changeover valve according to claim 14 , wherein at least one of the valve seats is integrally formed on the control plate.
31 . A transmission control unit having at least one changeover valve as claimed in claim 12.