THS II (TOYOTA HYBRID SYSTEM II)
02DTH90Y
Sun Gear
(MG1)
Carrier
(Engine)
Ring Gear
(Output)
rpm
0
(+)
(+)
(+)
(-)
(-)
(-)
02DTH97Y
Sun Gear
(MG1)
Carrier
(Engine)
Ring Gear
(Output)
TH-12
2. How to Read a Nomographic Chart
The nomographic chart below gives a visual representation of the planetary gear’s rotational direction,
rotational speed, and torque balance.
In the nomographic chart, a straight line is used to represent the relationship between the rotational speeds
of the 3 gears in the power split planetary gear unit. The rotational speed of each gear is indicated by the
distance from the 0 rpm point. Due to the structure of the power split planetary gear unit, the relationship
between the rotational speeds of the 3 gears is always expressed by a straight line.
The relationship between the gear rotation directions and the torque that acts on each gear is as described
below.
Due to the structure of this hybrid transaxle, the MG2 motive force acts on the ring gear via the motor speed
reduction planetary gear unit. The illustrations of the power split planetary gear unit operation on the
following pages, represent the rotational direction, rotational speed and torque condition that act on the
ring gear.
The nomographic charts and the illustrations of the power split planetary gear unit operation for each
vehicle running condition shown on the following pages represent one situation as an example.
Nomographic Chart
Power Split Planetary Gear Unit Operation
Condition of Power Split Planetary Gear Unit
Sun Gear (MG1)
Carrier (Engine)
Ring Gear (Output)
Rotational Direction
+
+
+
Torque Condition
-
+
-
Normal Driving (During Low Load and Constant-speed Cruising)
Содержание Camry Hybrid AHV40
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