EV-Motoring

2009 Tokyo Motor Show – Toyota Sai

TOKYO- TOYOTA MOTOR CORPORATION (TMC) announces the unveiling today in Japan of the compact luxury sedan Sai, which is planned to go on sale in Japan on December 7.

The Sai is based on a concept derived from the Japanese word sai – which means “talent” and “coloration” – as a hybrid-only sedan “combining advanced talent and multi-color sophistication”.

The Sai, designed with extensive consideration for the environment, features a gasoline-electric hybrid system with a 2.4-liter engine for outstanding fuel efficiency and use of Ecological Plastic (made from plant-derived materials) for approximately 60% of the interior surface area. Its highly efficient package achieves an outstanding balance between maneuverability, comfort, refined sedan styling and aerodynamic performance. Furthermore, in addition to offering advanced features for high-level safety performance, such as a millimeter-wave-radar Pre-crash Safety system, the Sai, among its other attributes, provides cruising performance and riding comfort befitting a luxury vehicle, altogether making it a compact luxury vehicle for a new era that brings together “talent” and “coloration” to enrich customers’ lifestyles.

Vehicle Outline


“Advanced talent”

Outstanding fuel efficiency and environmental performance

The Sai features the Toyota Hybrid System (THS) II combining a 2.4-liter Atkinson cycle combustion engine with an electric motor and a reduction gear. By delaying intake valve closure, the engine achieves a high expansion ratio at low pressure, thus raising heat efficiency.


Key Hybrid System Specifications

Engine Model 2AZ-FXE
Displacement 2,362cc
Maximum output 110kW (150PS)/6,000rpm
Maximum torque 187N-m (19.1kgf-m)/4,400rpm
Motor Maximum output 105kW (143PS)
Maximum torque 270N-m (27.5kgf-m)
Complete system Maximum output* 140kW (190PS)
HV battery Type Nickel-metal hydride

*Using both engine power and electric motor power
(based on TMC calculations)

The transaxle is exceptionally small and light, with a compact high-speed motor that achieves increased output and a reduction gear that increases torque.

An exhaust heat recovery system uses exhaust gas to heat the engine, thus shortening engine-warming time and contributing to greatly improved fuel efficiency, especially when outside temperatures are low.

LED headlights conserve electric power and consequently reduce power-generation requirements on the engine.

In addition to Standard Driving Mode, which balances fuel efficiency and power, drivers can also select Eco-Drive Mode, which prioritizes fuel efficiency by moderating driving force relative to accelerator operation and putting the air conditioner into a low energy-consumption mode, and Electric Vehicle (EV) Drive Mode, which uses the electric motor only, resulting in extremely quiet cruising and zero emissions.

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