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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. |
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•Actual Fuel Efficiency of Toyota Vehicles in FY2002
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•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 |
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*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 |
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| 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 |
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| 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 |
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| 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. |
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| 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. |
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•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 |
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•Fuel Efficiency Comparison between
Selected Old and New Models
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| 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 |
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Vitz |
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•Diagram Outlining AT Idling Stop
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