Lexus Hybrid System Return to top.
Equipped with Lexus' first four-cylinder gas engine, the 2.4-liter Atkinson-cycle powerplant generates 187 total system horsepower. The highly efficient Atkinson-cycle engine, made possible by the Variable Valve Timing with intelligence (VVT-i) system, allows the expansion/power stroke to be significantly longer than the compression stroke so that combustion energy can produce engine power more efficiently.
Performance is further enhanced by the Electronically controlled Continuously Variable Transmission (ECVT). Unlike typical automatic transmissions that have a fixed number of gear combinations, the hybrid's ECVT allows for virtually unlimited combinations, maximizing the powertrain's efficiency and allowing the driver to enjoy a smoother acceleration that can't be experienced with conventional transmissions.
To make efficient driving easier, a hybrid power meter shows instantaneous eco-driving status, while a green ECO indicator light rewards you when you are driving efficiently.
Driving Modes Return to top.
To make the most efficient use of the hybrid system, ECO mode controls the
hybrid system and air conditioning to prioritize fuel economy.
Power mode provides significantly more responsive acceleration.
lets you drive under electric power, virtually free of noise and emissions, at speeds up to 20 mph under certain conditions.
CAUTION! When driving a hybrid vehicle, pay special attention to the area around the vehicle. Because there is little vehicle noise in electric-only mode, pedestrians, people riding bicycles or other people and vehicles in the area may not be aware of the vehicle starting off or approaching them, so take extra care while driving.
Exhaust Heat-Recovery System
The Exhaust Heat-Recovery System further enhances fuel efficiency during winter months by enabling a faster engine warm-up time and also helps the car's heater warm up more quickly.
Shift by Wire
By removing the physical link to the transmission, Shift by Wire allowed the designers of the HS 250h to free up interior space that would have been taken up by the shifter.
Electronically Controlled Braking (ECB) with Regenerative Braking System
Pairing ingenuity with efficiency, regenerative braking converts braking energy into electricity to recharge the batteries, while the enhanced Electronically Controlled Braking (ECB) System is lighter, smaller and uses up to 29% less power than our previous regenerative braking system.
In addition to improving fuel consumption compared to conventional hydraulic power assist systems, the air conditioning compressor relies on electricity rather than the gasoline engine, Electric Power Steering improves responsiveness and feel, while the electric motor's cooling oil pump only operates when needed at high temperatures.
The air conditioning compressor is also electric instead of driven from the
Specifications, features, equipment, technical data,
performance figures, options, and color and trim are based upon
information available at time of posting, are subject to change without
notice, are for the State of Hawaii vehicles and may differ in the
mainland U.S.A. vehicles and in other regions. For more
information, call 808-54-LEXUS (808-545-3987).