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Hybrid Battery – Composed of sealed nickel-metal hydride modules, the
288-volt hybrid battery is located under the rear seat. It supplies power to
the electric motors during start-up, acceleration, uphill driving, and
reverse. It supplies power to the Inverter for use by the electric motors
and stores regenerative energy captured during coasting and braking
conditions.
Inverter – Converts the hybrid battery’s high voltage DC current into
AC current for the electric motors and vice versa, depending on driving
demands and electrical system needs. The inverter can also boost the hybrid
battery’s power up to 650 volts as needed.
Hybrid ElectronicControl System – Monitors and controls the power flow
operation of MG1, MG2, MGR*, and the inverter.
RegenerativeBraking System – Helps recover energy used to slow the
vehicle during braking or coasting. During braking or coasting, MG2 and
MGR* turn into generators, which create electricity to help charge the
hybrid battery. As they create electricity, they create drag, which helps slow
the vehicle. The conventional brake system and the regenerative brake sys-
tem work in conjunction with each other.
Electronically-controlledContinuously VariableTransmission(ECVT)–
Delivers smooth acceleration without conventional gear shifting, while
enhancing efficiency. It has fewer parts than a conventional automatic trans-
mission. MG1 and MG2 are part of the ECVT. During sustained highway
cruising, the ECVT helps maximize fuel economy for the engine.
12-volt Battery – Enables the Hybrid Electronic Control System to "start" the
hybrid system (vehicle “READY” mode) and operates the basic
electrical system. This battery is charged by the DC/DC converter, which is
part of the inverter assembly.
Lexus Hybrid Drive main components (continued)
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10
8
7
6
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* Vehicleswith optionalAll-Wheel Drive only.
RX 400h Hybrid Technology (continued)
HYBRID OVERVIEW
RX 400h