Highlights of Environmental Initiatives in FY2002
Development and Design
  Product Environmental Management System
  Improving Fuel Efficiency
  Reducing Exhaust Emissions
  Promoting an Increase in the Number of Vehicles that Meet Both the Ultra Low-Emission Vehicle Level and the 2010 Fuel Efficiency Standards
  Reducing External Automobile Noise
  Clean-Energy Vehicles
  LCA of New Models and Models Undergoing Complete Redesign
  New Prius: Unveiled at the New York International Automobile Show
Recycling and Sales/After Sales
Automobile Peripheral
and Other Businesses
Environmental Education/
Special Story
Consolidated Environmental Management
Environment-Related Awards Received by Toyota
Continued Reporting of
Environmental Aspects
Chronological Table
  Status of Responses to Meet the 2010 Fuel Efficiency Standards
In FY2002, Toyota vehicles cleared the 2010 Fuel Efficiency Standards in 9 out of 11 vehicle series, including both new models and those that underwent complete redesign. Six out of eight vehicle weight categories also achieved the 2010 Fuel Efficiency Standards. As a result, the number of gasoline-powered passenger vehicles meeting the 2010 Fuel Efficiency Standards reached 75% of total production.
•Actual Fuel Efficiency of Toyota Vehicles in FY2002
•Models that Meet the 2010 Fuel Efficiency Standards among FY2002 New Models and Those that Underwent Complete Redesign
Weight category
(Vehicle weight)
Fuel efficiency
standard (km/L)
FY2002 average
fuel efficiency
Qualifying vehicle series of FY2002 new models and those that underwent complete redesign
703 - 827 18.8 22.4
828 - 1,015 17.9 18.5 ist, WiLL CYPHA
1,016 - 1,265 16.0 16.1 ist,* Probox Wagon*
1,266 - 1,515 13.0 13.1 Caldina, WISH,* Crown Sedan with mild hybrid system
1,516 - 1,765 10.5 11.0 Harrier*
1,766 - 2,015 8.9 9.1 Alphard,* Harrier
2,016 - 2,265 7.8 7.8 Alphard, Land Cruiser Prado
2,266 - 6.4 6.3
*Some of the qualifying vehicle series may not meet the standards depending on models and specifications
indicates a category that has achieved the 2010 Fuel Efficiency Standards
*Vehicles in the 2,016 - 2,265kg category have achieved fuel efficiency only up to the first decimal place
*Vehicles that achieved the efficiency standards before FY2002 are not included
All fuel efficiency values are based on the Ministry of Land, Infrastructure and Transport's 10-15 Japanese test cycle
Increasing the Number of Vehicles with Fuel Efficient Engines
 With the goal of reducing CO2 emissions, Toyota achieved enhanced fuel efficiency in gasoline-powered vehicles, by installing the D-4 system with VVT-i,1 which improves fuel efficiency and produces cleaner exhaust emissions, thereby further improving the functions of the engine.
To achieve ultra-high fuel efficiency in diesel-powered vehicles, Toyota developed a new lightweight, compact direct-injection diesel engine called "1ND-TV." Toyota succeeded in reducing the engine size by using the same axle for the auxiliary drive in the front and back of the camshaft and by adopting a chain drive. Toyota also reduced the engine weight further by using an aluminum cylinder block, a magnesium cylinder head cover, and a plastic intake manifold.

1. VVT-i (Variable Valve Timing-Intelligent): Mechanism that continuously optimizes intake valve opening/closing timing based on the engine's operational condition
Improved Power Transmission
In order to improve the efficiency of power transmission, Toyota incorporated an automatic transmission equipped with a super intelligent flex lock-up function2 into 8 out of 11 new vehicle series and those that underwent complete redesign (ist, Alphard, Probox/Succeed, VOLTZ, Caldina, WiLL CYPHA, WISH and Harrier) in FY2002. A high efficiency torque converter and a highly responsive braking system realize high fuel efficiency.
Further, Toyota installed motor-driven power steering in the WISH.
In addition, the ist and WiLL CYPHA have been fitted with the Flex Fulltime 4WD mechanism, the Probox/Succeed, VOLTZ and Caldina with V3 Flex Fulltime 4WD mechanism, and the WISH with active torque control 4WD.

2. Flex lock-up function: This mechanism distributes transmission of mechanical and hydraulic pressure derived motive power in accordance with driving conditions, in particular raising transmission efficiency at low speeds and thus contributing to an improvement in fuel efficiency
3. V: Viscous Coupling
Lower Air Resistance
Toyota improved aerodynamic performance by making the floor panels flatter and using wheel spats. Also, in the WISH, Toyota adopted a simple monoform styling achieving a Cd (Coefficient of drag) value of 0.30, the highest in the minivan class.
Status of Achievement of FY2005 Fuel Efficiency Standards for Diesel Vehicles
All of the diesel-powered vehicles (Land Cruiser Prado, Hilux Surf and Probox/Succeed) that Toyota introduced in FY2002 met the FY2005 Fuel Efficiency Standards. With a direct-injection diesel engine that uses a new common rail fuel injection system, which precisely controls high-pressure fuel injection, along with a turbo charger equipped with an intercooler, the Land Cruiser Prado achieves a high fuel efficiency level of 11.2km/L, the Hilux Surf 11.4km/L, and the Probox/Succeed 23.0km/L.
•New Common Rail Fuel Injection System

Note: The new Common Rail Fuel Injection System stores fuel in the common rail after highly pressurizing it with a pump, allowing stable fuel injection pressure to be constantly maintained even at low speeds, unaffected by engine rpm or vehicle load
  •Fuel Efficiency Comparison between Selected Old and New Models
Vitz with AT Idling Stop System
Toyota installed the Toyota Intelligent Idling Stop System, which utilizes hybrid technologies, in the CVT4 version of the Vitz. Using a lithium-ion battery, the car's engine is automatically put into the idling stop state when the car comes to a stop, and is subsequently smoothly restarted. As a result, this version of the Vitz has achieved a fuel efficiency level of 25.5km/L (an 8.5% improvement over the previous version), the highest in Japan, excluding minivehicles and hybrid vehicles.
4. CVT: Continuously Variable Transmission
•Diagram Outlining AT Idling Stop
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