Automatic transmission with integrated engine starter, remote mounted pump and drive system
View Patent ↗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.
1. 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.
2. The multiple speed automatic transmission of claim 1 further including a plurality of torque transmitting devices selectively engageable to connect: one of said members of said one of said plurality of planetary gear assemblies to ground; another of said members of said one of said plurality of planetary gear assemblies and one of said members of yet another of said plurality of planetary gear assemblies to ground; another of said members of said yet another of said plurality of planetary gear assemblies to ground; and one of said members of another of said plurality of planetary gear assemblies and one of said members of still another of said plurality of planetary gear assemblies to ground.
3. The multiple speed automatic transmission of claim 1 wherein each of said at least three members of said plurality of planetary gear assemblies is one of a sun gear, a ring gear and a planet gear carrier.
4. The multiple speed automatic transmission of claim 1 wherein said one of said plurality of planetary gear assemblies is a compound planetary gear assembly and said one member of said compound planetary gear assembly is a sun gear, another member of said compound planetary gear assembly is a planet gear carrier and yet another member of said compound planetary gear assembly is a ring gear.
5. The multiple speed automatic transmission of claim 1 wherein said one member of said one of said plurality of planetary gear assemblies is a sun gear and wherein another of said members of said one of said plurality of planetary gear assemblies is selectively coupled to ground through a torque transmitting device.
6. The multiple speed automatic transmission of claim 1 wherein said one member of said another of said plurality of planetary gear assemblies is a planet gear carrier and wherein another member of said another of said plurality of planetary gear assemblies is selectively coupled to ground through a torque transmitting device.
7. 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.
8. The multiple speed automatic transmission of claim 7 wherein a first group of said plurality of torque transmitting devices are brakes and a second group of said plurality of torque transmitting devices are clutches.
9. The multiple speed automatic transmission of claim 7 wherein each of said three members of said first, second, third and fourth planetary gear assemblies is one of a sun gear, a ring gear and a planet gear carrier.
10. The multiple speed automatic transmission of claim 7 wherein said one member of said first planetary gear assembly is a planet gear carrier and said another member of said first planetary gear assembly is a sun gear.
11. The multiple speed automatic transmission of claim 7 wherein said one member of said second planetary gear assembly is a sun gear, said another member of said second planetary gear assembly is a planet gear carrier and said yet another member of said second planetary gear assembly is a ring gear.
12. The multiple speed automatic transmission of claim 7 wherein said one member of said third planetary gear assembly is a sun gear, said another member of said third planetary gear assembly is a planet gear carrier and said yet another member of said third planetary gear assembly is a ring gear.
13. The multiple speed automatic transmission of claim 7 wherein said one member of said fourth planetary gear assembly is a planet gear carrier, said another member of said fourth planetary gear assembly is a ring gear and said yet another member of said fourth planetary gear assembly is a sun gear.
14. The multiple speed automatic transmission of claim 7 wherein said second planetary gear assembly is a compound planetary gear assembly.
15. 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.
16. The multiple speed automatic transmission of claim 15 further including a first friction brake disposed between said sun gear of said first planetary gear assembly and a housing, a second friction brake disposed between said ring gears of said first and said second planetary gear assemblies and said housing, a third friction brake disposed between said planet gear carrier of said first planetary gear assembly and said housing, and a fourth friction brake disposed between said planet gear carrier of said third planetary gear assembly and said ring gear of said fourth planetary gear assembly and said housing.
17. The multiple speed automatic transmission of claim 15 further including a first friction clutch disposed between said input member and said sun gear of said fourth planetary gear assembly and a second friction clutch disposed between said input member and said planet gear carrier of said third planetary gear assembly.
18. The multiple speed automatic transmission of claim 15 wherein said first, third and fourth planetary gear assemblies are simple planetary gear assemblies and said second planetary gear assembly is a compound planetary gear assembly.
19. The multiple speed automatic transmission of claim 15 wherein said starter motor assembly includes an output shaft having gear teeth and an idler gear engaging said gear teeth and said drive gear.
20. The multiple speed automatic transmission of claim 15 further including a hydraulic pump driven by said drive gear.