HYBRID SYNERGY DRIVE COMPONENT
LOCATIONS AND DESCRIPTIONS
COMPONENT
LOCATION
DESCRIPTION
12-Volt
❶
Luggage
A lead-acid battery
Auxiliary Battery
Compartment
that supplies power to
the low voltage devices.
Hybrid
❷
Luggage
288-Volt Nickel Metal
Vehicle (HV)
Compartment
Hydride (NiMH) battery
Battery Pack
Area, Mounted
pack consisting of 40
to Cross Member
low voltage (7.2-Volt)
and behind Rear
modules connected
Seat
in series.
Power
❸
Under Carriage
Orange coloured power
Cables
and Engine
supply cables carry high-
Compartment
voltage Direct Current
(DC) between the HV
battery pack,
inverter/converter, and
A/C compressor. These
cables also carry 3-phase
Alternating Current (AC)
between the inverter/
converter, electrical
motor, and generator.
Inverter/
Engine
Boosts and inverts the
Converter
❹
Compartment
high voltage electricity
from the HV battery pack
to 3-phase AC electricity
that drives the electric
motor. The inverter/
converter also converts
AC electricity from the
electric generator and
electric motor
(regenerative braking) to
DC that recharges the HV
battery pack.
Petrol
❺
Engine Provides
two
functions:
Engine
Compartment
1) powers vehicle:
2) powers generator to
recharge the HV battery
pack. The engine is
started and stopped
under control of the
vehicle computer.
Electric
❻
Transmission 3-phase
high-voltage
Generator
AC generator that is
contained in the
transmission and
recharges the HV
battery pack.
Electric
❼
Transmission 3-phase
high-voltage
Motor
AC permanent magnet
electric motor contained
in the transmission and
drives the rear wheels
through the propeller
shaft.
– 4 –
Hybrid Synergy Drive Components
❶
❷
❸
❹
❺
❻ ❼
❽
➒
Components (Top View) and High Voltage
Power Cables
❶
❷
❸
❹
❺
❻❼
❽
➒
7940 - Lexus A4 ERG Book 3/5/06 3:23 PM Page 4