Hydraulic damping rail for power shift transmission
A hydraulic damping rail includes a primary rail wall defining a primary rail volume, a rail inlet structured to provide communication of hydraulic fluid between a hydraulic pump and the primary rail volume, and a plurality of rail outlets configured to provide communication between the primary rail volume and a plurality of clutch valves. A spacing between adjacent pairs of rail outlets of the plurality of rail outlets is variable.
1. A hydraulic damping rail for a power shift transmission, the hydraulic damping rail comprising:
a primary rail wall defining a primary rail volume;
a rail inlet configured to fluidly couple the primary rail volume to a hydraulic pump; and
a plurality of rail outlets configured to fluidly couple the primary rail volume to a plurality of clutch valves, wherein a spacing between adjacent pairs of rail outlets of the plurality of rail outlets is variable.
2. The hydraulic damping rail of claim 1 , wherein a first spacing between a first adjacent pair of rail outlets positioned proximate the rail inlet is larger than a second spacing between a second adjacent pair of rail outlets positioned further from the rail inlet.
3. The hydraulic damping rail of claim 1 , further comprising a manifold fluidly coupled to the plurality of rail outlets, the manifold configured to fluidly couple to the plurality of clutch valves.
4. The hydraulic damping rail of claim 3 , wherein the manifold defines passages configured to fluidly couple each rail outlet of the plurality of rail outlets to a respective one of the plurality of clutch valves.
5. The hydraulic damping rail of claim 1 , wherein the rail inlet is positioned on a first side of the primary rail wall and the plurality of rail outlets are all positioned on a second side of the primary rail wall opposite the first side.
6. The hydraulic damping rail of claim 1 , further comprising a secondary rail wall defining a secondary rail volume.
7. The hydraulic damping rail of claim 6 , wherein the primary rail wall defines a first diameter, and wherein the secondary rail wall defines a second diameter greater than the first diameter.
8. The hydraulic damping rail of claim 7 , further comprising a damper positioned within the secondary rail volume.
9. The hydraulic damping rail of claim 8 , wherein the damper includes a piston.
10. The hydraulic damping rail of claim 9 , wherein the damper includes a spring biasing the piston.
11. The hydraulic damping rail of claim 8 , wherein the damper is a first damper, further comprising:
a tertiary rail wall defining a tertiary rail volume; and
a second damper positioned within the tertiary rail volume.
12. The hydraulic damping rail of claim 11 , wherein the secondary rail volume and the tertiary rail volume are positioned on opposing ends of the primary rail volume.
13. A hydraulic damping rail for a power shift transmission, the hydraulic damping rail comprising:
a rail wall defining a volume, wherein a cross-sectional dimension of the volume varies along a length of the rail wall;
a rail inlet configured to fluidly couple the volume to a hydraulic pump; and
a plurality of rail outlets configured to fluidly couple the volume to a plurality of clutch valves.
14. The hydraulic damping rail of claim 13 , wherein a spacing between adjacent pairs of rail outlets of the plurality of rail outlets is variable.
15. The hydraulic damping rail of claim 13 , wherein a first portion of the volume has a first diameter, and wherein a second portion of the volume has a second diameter greater than the first diameter.
16. The hydraulic damping rail of claim 15 , further comprising a damper positioned within the second portion of the volume.
17. The hydraulic damping rail of claim 15 , wherein a third portion of the volume has a third diameter greater than the first diameter.
18. The hydraulic damping rail of claim 17 , wherein the second portion and the third portion are positioned on opposing sides of the first portion.
19. A hydraulic damping rail for a power shift transmission, the hydraulic damping rail comprising:
a rail wall defining a volume;
a rail inlet configured to fluidly couple the volume to a hydraulic pump;
a plurality of rail outlets; and
a manifold fluidly coupled to the plurality of rail outlets, the manifold configured to fluidly couple to a plurality of clutch valves.
20. The hydraulic damping rail of claim 19 , wherein at least one of (a) a spacing between adjacent pairs of rail outlets of the plurality of rail outlets is variable or (b) a cross-sectional dimension of the volume varies along a length of the rail wall.