US 6,155,364 AGranted

Hybrid drive system wherein planetary gear mechanism is disposed radially inwardly of stator coil of motor/generator

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsShuji Nagano, Kunio Morisawa, Hideaki Matsui, Ryuji Ibaraki

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Abstract

Hybrid drive system for a motor vehicle, including (a) an engine operated by combustion of a fuel, (b) a planetary gear mechanism having a sun gear and a carrier one of which is connected to the engine, and a ring gear connected to an output member, (c) a motor/generator connected to the output member, and (d) a differential gear device including output shafts and an input member rotated by a drive force received from the output member, and wherein the motor/generator, the planetary gear mechanism and the output member are arranged coaxially with each other along a first axis, and the output shafts of the differential gear device are disposed along a second axis parallel to the first axis. The planetary gear mechanism is disposed in a radially inner space provided radially inwardly of a stator coil of the motor/generator, and the input member includes a radially outer portion which overlaps a radially outer portion of the motor/generator in the radial direction of the motor/generator.

Claims19

Dependent claims

A hybrid drive system for a motor vehicle, comprising (a) an engine operated by combustion of a fuel, (b) a planetary gear mechanism having a sun gear and a carriers one of which is connected to said engine, a ring gear connected to an output member, and (c) a first motor/generator connected to said out put member, and wherein said first motor/generator, said planetary gear mechanism and said output member are arranged coaxially with each other along a first axis, wherein the improvement comprises:

said first motor/generator having a stator and a stator coil which axially extends beyond an end of the stator to form a radially inner space provided radially inwardly of said stator coil, said planetary gear mechanism being disposed in said radially inner space and radially adjacent to said stator coil and being isolated from said stator and said stator coil of said first motor/generator by a partition wall;
and
a differential gear device which receives a drive force from said output member and distributes the received drive force to right and left drive wheels of the motor vehicle, said differential gear device including a pair of output shafts disposed along a second axis substantially parallel to said first axis, and an input member which is substantially aligned with said output member in an axial direction of said output shafts, wherein said input member is aligned with said output member in an axial direction of an intermediate rotary member.

A hybrid drive system for a motor vehicle having right and left drive wheels, comprising (a) an engine operated by combustion of a fuel, (b) a first motor/generator, (c) an output member connected to said first motor/generator, and (d) a differential gear device which receives a drive force from said output member and distributes the received drive force to said right and left drive wheels, and wherein said engine, said first motor/generator and said output member are arranged coaxially with each other along a first axis, and said differential gear device includes a pair of output shafts disposed along a second axis substantially parallel to said first axis, and an input member which is rotatable about said second axis by the drive force received from said output member, wherein the improvement comprises:

said input member having a radially outer portion which overlaps a radially outer portion of said first motor/generator, wherein said system further comprises a planetary gear mechanism and said first motor/generator has a stator coil which axially extends beyond an end of a stator of the first motor/generator to form a radially inner space provided radially inwardly of said stator coil, said planetary gear mechanism being disposed in said radially inner space and radially adjacent to said stator coil and being isolated from said stator and said stator coil by a partition wall;
and
a differential gear device which receives a drive force from said output member and distributes the received drive force to right and left drive wheels of the motor vehicle, said differential gear device including a pair of output shafts disposed along a second axis substantially parallel to said first axis, and an input member which is substantially aligned with said output member in an axial direction of said output shafts, wherein said input member is aligned with said output member in an axial direction of an intermediate rotary member.

Dependencies are inferred from the claim text.

Facts

Application: 08/801,299Filed 18 Feb 1997
Priority: JP 8-03357821 Feb 1996
Granted: 5 Dec 2000
Term ends: Not estimatedThe source records don’t support an estimate.

Classification38 codes

B60W 20/10
Control systems specially adapted for hybrid vehicles: controlling the power contribution of each of the prime movers to meet required power demand
B60K 6/26
Characterised by apparatus, components or means specially adapted for HEVs: characterised by the motors or the generators
B60K 6/365
Characterised by the transmission gearings: with the gears having orbital motion
B60K 6/40
Characterised by apparatus, components or means specially adapted for HEVs: characterised by the assembly or relative disposition of components