Patent ID: 7410438
Filing Date: 2008-08-12
Classification: F16H,Y10T

Abstract:
1. A switching-valve arrangement for a shifting system of an automatic transmission having a first actuator for engaging and releasing gears, at least a second actuator for engaging and releasing gears, a first activatable switching valve, a second activatable switching valve, a first signal element, and a second signal element, wherein by means of the first activatable switching valve, in a first position, the first actuator can be set to a pressureless state and, in a second position, the first actuator can be subjected to pressure, a first switching force being provided by the first signal element for switching the valve from the first position into the second position and for retaining it in the second position, and by means of the second activatable switching valve, in a first position, the second actuator can be set to a pressureless state and, in a second position, the second actuator can be subjected to pressure, a second switching force being provided by the second signal element for switching the valve from the first position into the second position and for retaining it in the second position, wherein in case of failure of one of the signal elements one of the actuators can always be pressurized and even in case of erroneous operation of the first and second signal elements only one of the actuators can be pressurized at the same time.