US 12,409,723 B2
Venting device
Bernhard Maier, Bruckberg (DE); and Peter Streng, Emmering (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/915,206
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed May 20, 2021, PCT No. PCT/EP2021/063418
§ 371(c)(1), (2) Date Sep. 28, 2022,
PCT Pub. No. WO2021/254718, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 10 2020 116 049.6 (DE), filed on Jun. 18, 2020.
Prior Publication US 2023/0116887 A1, Apr. 13, 2023
Int. Cl. B60K 11/06 (2006.01); F16H 57/027 (2012.01)
CPC B60K 11/06 (2013.01) [F16H 57/027 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A venting apparatus for a motor-vehicle drive component, comprising:
an air-feed device which has an air-guide region, by way of which air-guide region the air-feed device is connectable in a fluid-conducting manner to an interior space to be vented;
a membrane vent which has a venting membrane, said venting membrane being permeable to water vapor in a first flow direction and being resistant to permeation of water vapor in a second flow direction; and,
an air-discharge device, wherein:
the membrane vent is at least intermittently connected in a fluid-conducting manner to the air-guide region,
a supply-air direction is a flow direction from an environment surrounding the venting apparatus, through the venting membrane and to the air-guide region, and
the venting membrane is arranged in an air-guide housing in such a way that said venting membrane is resistant to permeation of water vapor in the supply-air direction;
a supply-air shut-off valve is arranged downstream of the venting membrane and upstream of the air-guide region in the supply-air direction,
a fluid flow counter to the supply-air direction from the air-guide region to the venting membrane is prevented by said supply-air shut-off valve;
the air-discharge device has at least one air-exit opening via which air is deliverable to the environment surrounding the venting apparatus,
the air-discharge device has an air-discharge region, by way of which the air-discharge device is connectable in a fluid-conducting manner to the interior space to be vented,
an exhaust-air direction in the air-discharge device is a flow direction from the air-discharge region to the at least one air-exit opening;
an exhaust-air shut-off valve is arranged upstream of the air-exit opening and downstream of the air-discharge region in said exhaust-air direction,
a fluid flow from the at least one air-exit opening to the air-discharge region is prevented by said exhaust-air shut-off valve,
the supply-air shut-off valve and the exhaust-air shut-off valve have a common valve body which is movable in response to a change in pressure in the interior space between at least two end positions such that (i) in a first end position, a flow in the air-discharge device in the exhaust-air direction is allowed and a flow in the air-feed device in the supply-air direction is blocked, and (ii) in a second end position, a flow in the air-feed device in the supply-air direction is allowed and a flow in the air-discharge device in the exhaust-air direction is blocked.