Automatic transmission with integrated engine starter, remote mounted pump and drive system
AssigneeGM Global Technology Operations LLC
InventorsDaryl A. Wilton, James M. Hart
Life of this patent
Estimating the term…
Abstract
An automatic transmission includes a plurality of planetary gear assemblies, an integrated starter, a remote mounted hydraulic pump and a common drive system. An input shaft of the automatic transmission is coupled to and drives a ring (spur) gear. In one portion of the automatic transmission, a starter motor is disposed and includes gear teeth on an output shaft that engage a pinion gear that, in turn, engages the input shaft ring gear. In another portion of the automatic transmission, preferably the lower portion, an off axis hydraulic pump includes a drive shaft and driven gear which also engages the input shaft ring gear.
Claims20
A multiple speed automatic transmission comprising, in combination,
- an input member,
- at least one input clutch having an input coupled to said input member and an output,
- a plurality of planetary gear assemblies, at least three of said planetary gear assemblies having at least three members,
- one of said plurality of planetary gear assemblies having one of said at least three members coupled to said output of said clutch and including a gear train engaging a starter motor and a hydraulic pump, and
- an output member coupled to one of said at least three members of another one of said plurality of planetary gear assemblies.
A multiple speed automatic transmission comprising, in combination,
- a first, a second, a third and a fourth planetary gear assembly, each of said planetary gear assemblies having three members,
- an input member connected to one of said members of said second planetary gear assembly said input member including a gear assembly engaging a starter motor and a hydraulic pump,
- an output member connected to one of said members of said fourth planetary gear assembly,
- a first member for connecting one of said members of said first planetary gear assembly with another of said members of said second planetary gear assembly,
- a second member for connecting said another of said members of said second planetary gear assembly with one of said members of said third planetary gear assembly,
- a third member for connecting another member of said third planetary gear assembly with another of said members of said fourth planetary gear assembly,
- a fourth member for connecting yet another of said members of said third planetary gear assembly with said one of said members of said fourth planetary gear assembly, and
- a plurality of torque transmitting devices selectively engageable to connect:
- another of said members of said first planetary gear assembly to ground, said first connecting member to ground, yet another of said members of said second planetary gear assembly to ground, said third connecting member to ground, said input member to said yet another of said members of said fourth planetary gear assembly and said input member to said another of said members of said third planetary gear assembly.
A multiple speed automatic transmission comprising, in combination,
- an input member having a drive gear coupled thereto,
- a starter motor assembly operably engaged by said drive gear,
- an output member,
- a first planetary gear assembly having a sun gear and an elongate planet gear carrier rotatably supporting a plurality of planet gears,
- a second planetary gear assembly having a sun gear coupled to said input member, said elongate planet gear carrier of said first planetary gear assembly including said plurality of planet gears and a ring gear,
- a third planetary gear assembly having a sun gear coupled to said elongate planetary gear carrier of said first and second planetary gear assembly, a planet gear carrier rotatably supporting a plurality of planet gears and a ring gear,
- a fourth planetary gear assembly having a sun gear, a planet gear carrier coupled to and driving said output member, coupled to said ring gear of said third planetary gear assembly and rotatably supporting a plurality of planet gears and a ring gear coupled to said planet gear carrier of said third planetary gear assembly.
Dependencies are inferred from the claim text.