Engine Compartment; Hybrid Component Locations & Descriptions - Lexus ES300h Vehicle Dismantling Manual

Hybrid Component Locations & Descriptions
Component
Luggage
12 Volt Auxiliary
Battery 
Compartment
Hybrid Vehicle Cabin Area,
(HV) Battery Mounted Under
Pack Rear Seat
Power Cables 
Undercarriage and
Engine
Compartment
Inverter/ Engine
Converter 
Compartment
Gasoline Engine Engine

Compartment
Electric Motor  Engine
Compartment
Electric Generator Engine

Compartment
A/C Compressor Engine
(with Inverter) 
Compartment
DC-DC Converter Engine
for 12 Volt Compartment
Auxiliary Battery

Fuel Tank and Fuel Undercarriage and
Line 
Center
*Numbers in the component column apply to the illustrations on the following page.
Location
Supplies electricity to the electrical components.
• Supplies electrical power to MG1 and MG2 in
accordance with the driving conditions of the vehicle.
• Recharged by MG1 and MG2 in accordance with the
SOC and the driving conditions of the vehicle.
Connects the HV battery, inverter with converter
assembly, hybrid vehicle transaxle assembly and
compressor with motor assembly.
• Converts the direct current from the boost converter
into alternating current for MG1 and MG2, and vice
versa (from AC to DC).
•Boosts the HV battery nominal voltage of DC 244.8 V
up to a maximum voltage of DC 650 V and vice versa
(steps down DC 650 V to DC 244.8 V).
Provides two functions:
1) Powers vehicle.
2) Powers generator to recharge the HV battery pack.
The engine is started and stopped under control of the
vehicle computer.
• MG2, which is driven by electrical power from MG1
and the HV battery, generates motive force for the drive
wheels.
• During braking, or when the accelerator pedal is not
depressed, it generates high-voltage electricity to recharge
the HV battery.
MG1, which is driven by the engine, generates
high-voltage electricity in order to operate MG2 and
charge the HV battery. Also, it functions as a starter to
start the engine.
3-phase high voltage AC electrically driven motor
compressor.
Steps down the HV battery nominal voltage of DC 244.8
V to approximately DC 14 V in order to supply electricity
to the electrical components, as well as to recharge the
auxiliary battery.
The fuel tank provides gasoline via a fuel line to the
engine. The fuel line is routed under the center of
vehicle.
Description
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