Nissan Altima HL32 Hybrid. Manual - part 1071

TM-2

SERVICE DATA AND SPECIFICATIONS 
(SDS) ..................................................................

38

General Specification ..............................................

38

MECHANICAL SYSTEM

TM-3

< FUNCTION DIAGNOSIS >

[HYBRID TRANSAXLE: RE0F01H]

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FUNCTION DIAGNOSIS

MECHANICAL SYSTEM

Description

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• Containing a MG2 (Motor Generator No.2) for driving the vehicle and a MG1 (Motor Generator No.1) for

generating electrical power, this hybrid transaxle uses a continuously variable transmission mechanism with

compound gear unit (which consists of a motor speed reduction planetary gear unit and a power split plane-

tary gear unit) that achieve smooth and quiet operation.

• A transaxle damper that consists of a coil spring with low-twist characteristics is used in order to absorb the

torque fluctuation in the drive force of the engine.

• This transaxle uses two lubrication mechanisms concurrently: a lubrication mechanism consisting of a tro-

choid type oil pump placed on the main shaft, and a lubrication mechanism consisting of an oil slinger on the

final gear. The concurrent use of the two mechanisms reduces the drive loss of the oil pump.

SPECIFICATIONS

JPDIA0081ZZ

TM-4

< FUNCTION DIAGNOSIS >

[HYBRID TRANSAXLE: RE0F01H]

MECHANICAL SYSTEM

Refer to 

TM-38, "General Specification"

.

Transaxle Unit

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GENERAL

• This hybrid transaxle consists primarily of MG1 and MG2, a compound gear unit (which consists of a motor

speed reduction planetary gear unit and a power split planetary gear unit), a counter gear unit, and a differ-

ential gear unit.

• This transaxle has a three-shaft configuration. The compound gear unit (consisting of the motor speed

reduction planetary unit and a power split planetary gear unit), MG1 and MG2 are provided on the main

shaft. The counter driven gear and the final drive gear are provided on the second shaft. The differential ring

gear and the differential gear unit are provided on the third shaft.

• The engine, MG1 and MG2 are mechanically joined via the compound gear unit.

• The compound gear unit contains a motor speed reduction planetary gear unit and a power split planetary

gear unit. The motor speed reduction planetary gear unit, whose purpose is to reduce motor speed, is used

to enable the high-speed, high-output MG2 to adapt optimally to the power split planetary gear unit. The

power split planetary gear unit splits the motive force of the engine two ways: one to drive the wheels, and

the other to drive the MG1, so that it can function as a generator.

JPDIA0082GB

MECHANICAL SYSTEM

TM-5

< FUNCTION DIAGNOSIS >

[HYBRID TRANSAXLE: RE0F01H]

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• In the motor speed reduction planetary gear unit, the sun gear is coupled to the output shaft of MG2, and the

carrier is fixed.

COMPOUND GEAR UNIT

General

The compound gear unit consists of a motor speed reduction planetary gear, and a power split planetary gear.

Each planetary ring gear is integrated with the compound gear. Furthermore, this compound gear is integrated

with a counter drive gear and parking gear.

JPDIA0083GB

JPDIA0084GB