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Lexus RX450 Hybrid Drive
The RX450h 5-door wagon joins the hybrid model for Lexus Hybrid Drive means that the vehicle contains a gasoline engine and front and rear electric motors for power. The two-hybrid power sources are stored onboard the vehicle: 1. Gasoline stored in the fuel tank for the gasoline engine. 2. Electricity stored in a high voltage Hybrid Vehicle (HV) battery pack for the front and rear electric motors. The result of combining these two power sources is improved fuel economy and reduced emissions. The gasoline engine also powers an electric generator to recharge the battery pack; unlike a pure all-electric vehicle, the RX450h never needs to be recharged from an external electric power source. Depending on the driving conditions one or both sources are used to power the vehicle. The following illustration demonstrates how the RX450h operates in various driving modes.
During light acceleration at low speeds, the vehicle is powered by the front and rear electric motors. The gasoline engine is shut off.
During normal driving, the vehicle is powered mainly by the gasoline engine. The gasoline engine also powers the generator to recharge the battery pack and to drive the motor.
During full acceleration, such as climbing a hill, both the gasoline engine and the front and rear electric motors power the vehicle.
During deceleration, such as when braking, the vehicle regenerates the kinetic energy from the front and rear wheels to produce electricity that recharges the battery pack.
While the vehicle is stopped, the gasoline engine and front and rear electric motors are off, however, the vehicle remains on and operational. (Download Lexus owners manual)