Patent ES-8603633-A1 (ES)
Title: Automatic transmission with venting.
IPC: F16H57/027
Filed: 1984-08-14
Abstract: An automatic transmission for use with an internal combustion engine (10) having a vacuum source (14) in which a transmission housing (20) is provided with a vent (28), a passage (30,34,38) connects the transmission vent (28) to the vacuum source (14), and one-way valve means (32) is connected in the passage (30,34,38) for preventing fluid flow from the vacuum source (14) to the transmission vent (28), characterised in that vacuum regulator means (36) is connected in the passage (30,34,38) between the vacuum source (14) and the one-way valve means (32) for limiting the maximum vacuum in the transmission housing (20), and a fill tube (40) on the transmission housing (20) is provided with restrictor means (44) providing a flow restriction effective to balance the flow rates of air into and out of the transmission housing (20), whereby the interior of the transmission housing (20) is maintained at a pressure less than atmospheric, as limited by the vacuum regulator means, when the engine (10) is operating and the vacuum source is functioning. - (4pp) EPAB- EP-137596 B An automatic transmission for use with an internal combustion engine (10) having a vacuum source (14) in which a transmission housing (20) is provided with a vent (28), a passage (30,34,38) connects the transmission vent (28) to the vacuum source (14), and one-way valve means (32) is connected in the passage (30,34,38) for preventing fluid flow from the vacuum source (14) to the transmission vent (28), characterised in that vacuum regulator means (36) is connected in the passage (30,34,38) between the vacuum source (14) and the one-way valve means (32) for limiting the maximum vacuum in the transmission housing (20), and a fill tube (40) on the transmission housing (20) is provided with restrictor means (44) providing a flow restriction effective to balance the flow rates of air into and out of the transmission housing (20), whereby the interior of the transmission housing (20) is maintained at a pressure less than atmospheric, as limited by the vacuum regulator means, when the engine (10) is operating and the vacuum source is functioning. - EP-137596 B An automatic transmission for use with an internal combustion engine (10) having a vacuum source (14) in which a transmission housing (20) is provided with a vent (28), a passage (30,34,38) connects the transmission vent (28) to the vacuum source (14), and one-way valve means (32) is connected in the passage (30,34,38) for preventing fluid flow from the vacuum source (14) to the transmission vent (28), characterised in that vacuum regulator means (36) is connected in the passage (30,34,38) between the vacuum source (14) and the one-way valve means (32) for limiting the maximum vacuum in the transmission housing (20), and a fill tube (40) on the transmission housing (20) is provided with restrictor means (44) providing a flow restriction effective to balance the flow rates of air into and out of the transmission housing (20), whereby the interior of the transmission housing (20) is maintained at a pressure less than atmospheric, as limited by the vacuum regulator means, when the engine (10) is operating and the vacuum source is functioning. (4pp) USAB- US4465030 A The transmission includes a housing having the interior connected for fluid communication with a vacuum source, such as an engine manifold. A check valve and regulator valve are disposed between the transmission housing and the vacuum source. The check valve prevents fluid flow from the vacuum source to the transmission while the regulator valve limits the maximum vacuum that can be drawn in the transmission housing. - The normal transmission fill tube opening has a filter for restricting fluid flow to the interior of the housing or a cap for preventing fluid flow through the fill tube during normal operation.