Lubrication system for transmission

1 . A lubrication system for a transmission assembly comprising:

a lubrication tube;

a plurality of oil conduits extending from and in fluid communication with the lubrication tube;

a plurality of poppet valve assemblies, at least one of the plurality of poppet valve assemblies being disposed in each of the plurality of oil conduits; and

a shift assembly comprising:

a shift shaft translatable in a longitudinal direction; and

a cam mechanism disposed about the shift shaft;

wherein the cam mechanism of the shift assembly is configured to engage each of the plurality of poppet valve assemblies to actuate each of the plurality of poppet valve assemblies between a closed position and an open position.

2 . The lubrication system of claim 1 , wherein, in the closed position, each of the plurality of poppet valve assemblies form a seal with the plurality of oil conduits.

3 . The lubrication system of claim 1 , wherein the shift assembly further defines an oil pathway configured to direct oil from the plurality of oil conduits to a plurality of shift bearings.

4 . The lubrication system of claim 1 , wherein the cam mechanism includes a curved profile, such that contact between the curved profile of the cam mechanism and each of the plurality of poppet valve assemblies actuated the plurality of poppet valve assemblies between the closed position and the open position.

5 . The lubrication system of claim 1 , wherein each of the plurality of poppet valve assemblies include a body having a tapered end.

6 . The lubrication system of claim 1 , wherein each of the plurality of poppet valve assemblies includes a spring mechanism configured to secure the plurality of poppet valve assemblies in the closed position.

7 . The lubrication system of claim 1 , wherein each of the plurality of poppet valve assemblies further includes a pin configured to secure each of the plurality of poppet valve assemblies within each of the plurality of oil conduits.

8 . The lubrication system of claim 1 , wherein each of the plurality of poppet valve assemblies further includes a plurality of grooves formed on a body of each of the plurality of poppet valve assemblies.

9 . A transmission assembly comprising:

a transmission housing defining a transmission shaft extending at least partially through the transmission housing;

a lubrication system disposed within the transmission housing, the lubrication system comprising:

a lubrication tube in fluid communication with at least one of the plurality of gears;

a plurality of oil conduits extending from and in fluid communication with the lubrication tube;

a plurality of poppet valve assemblies, at least one of the plurality of poppet valve assemblies being disposed in each of the plurality of oil conduits; and

a shift assembly translatable in a longitudinal direction relative the plurality of oil conduits;

wherein the shift assembly is configured to engage each of the plurality of poppet valve assemblies to actuate each of the plurality of poppet valve assemblies between a closed position and an open position.

10 . The transmission assembly of claim 9 , further comprising a brake assembly disposed within the transmission shaft.

11 . The transmission assembly of claim 10 , wherein the brake assembly further includes an e-axle.

12 . The transmission assembly of claim 9 , wherein the lubrication tube of the lubrication system extends at least partially in parallel with the transmission shaft.

13 . The transmission assembly of claim 9 , wherein the shift assembly comprises:

a shift shaft translatable in the longitudinal direction; and

a cam mechanism disposed about the shift shaft;

wherein the cam mechanism is configured to engage each of the plurality of poppet valve assemblies.

14 . The transmission assembly of claim 9 , wherein, in the open position, oil circumvents each of the plurality of poppet valve assemblies, such that oil flows from the lubrication tube to the shift assembly via the plurality of oil conduits.

15 . The transmission assembly of claim 9 , wherein each of the plurality of poppet valve assemblies include a body having a tapered end, such that the tapered end of each of the plurality of poppet valve assemblies forms a seal with each of the plurality of oil conduits when the plurality of poppet valve assemblies are in the closed position.

16 . The lubrication system of claim 9 , wherein each of the plurality of poppet valve assemblies includes a spring mechanism configured to secure the plurality of poppet valve assemblies in the closed position.

17 . The lubrication system of claim 9 wherein each of the plurality of poppet valve assemblies further includes a pin configured to secure each of the plurality of poppet valve assemblies within each of the plurality of oil conduits.

18 . The lubrication system of claim 9 , wherein each of the plurality of poppet valve assemblies further includes a plurality of grooves formed on a body of each of the plurality of poppet valve assemblies.

19 . A method of lubricating a transmission system, the method comprising:

scavenging, via a lubrication tube of a lubrication system disposed within the transmission system, oil from at least one of a plurality of gears;

directing the scavenged oil from the lubrication tube to a plurality of oil conduits extending from the lubrication tube; and

translating a shift assembly in a longitudinal direction such that the shift assembly actuates a plurality of poppet valve assemblies disposed in the plurality of oil conduits between a closed position and an open position;

wherein the scavenged oil circumvents the plurality of poppet valve assemblies in the open position and the plurality of poppet valve assemblies form a seal with the plurality of oil conduits in the closed position.

20 . The method of claim 19 , further comprising translating the plurality of poppet valves assemblies from the closed position to the open position and directing the scavenged oil from the plurality of oil conduits to a plurality of shift bearings formed within the shift assembly.