Device for actuating a parking lock of an automatic transmission, and parking lock apparatus for such an automatic transmission
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United States of America Patent
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Sep 22, 2020
Grant Date -
Oct 10, 2019
app pub date -
Jun 12, 2017
filing date -
Jun 17, 2016
priority date (Note) -
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Abstract
A device for actuating a parking lock of an automatic transmission for a motor vehicle. A piston, which a hydraulic medium can be applied from a reservoir by a valve apparatus in order to actuate the parking lock by a valve apparatus, which has a first valve and a second valve, which is arranged downstream of the first valve and upstream of the piston in the flow direction of the hydraulic medium from the reservoir to the piston and which has at least one device connection, by way of which the hydraulic medium can be applied to the piston, the second valve having at least two switching states, and a working chamber, which is bounded by the housing element and by the piston and into which the hydraulic medium can be introduced from the reservoir by the valve apparatus in order to apply the hydraulic medium to the piston.
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