Effects of Eco-Driving
Contribution toEnvironmental
Preservation

Many goodthings aredescribed...

...but it’sdifficult tobuild up
drivers’
enthusiasm

Prevention of global warming
Prevention of air pollution

Implementation of Eco-driving

Improvementof Safety

Improvement ofCost-effectiveness

Reduction in traffic
accidents

Saving of fuel costs
Reduction in vehicle
maintenance costs

1General Perceptions on Eco-driving
Drivers are not aware that they start/accelerate suddenly.

1.
••

Drivers have an awareness that they practice decent level of eco-driving.
Drivers think that further efforts will involve extraordinary driving
operations.

Eco-driving produces little energy saving effect.

2.
••

Almost everyone assumes a energy saving of approx. 5%.
Most drivers do not object to the promotion of eco-driving. However, they
are hesitant to practice it themselves.

Eco-driving depends on traffic environment and limits freedomof drivers.

3.

••

Drivers are afraid that disturbing traffic flow will be a nuisance to others.
Drivers attribute their inability to practice eco-driving to the performanceof their cars or traffic environment.

If the drivers’ perceptions are renewed,-> they can take a step closer to practicing eco-driving.
2

The Energy Conservation Center Japan

Eco- Driving for energy efficiency
Four Driving Modes• We drive the vehicle with repeating 4 driving states(modes): start, cruise, deceleration, and stop.
SpeedStart

CruiseDepressing
the gaspedal

Speed control
technique

Deceleration

Efficient
deceleration

Stop

Effect of stopping
the engine idling

Time3

The Energy Conservation Center Japan(1) Start : Gentle Acceleration“e-Start”• The driving technic when you start is to lightly press theaccelerator to move car “gently”.
– Check the speedometer when you have counted “five” after starting.
Try to reach a rough target speed of 20 km/h at this time.
– When a revolution counter is provided, accelerate at around 1500rpm.
– When there is no revolution counter, press the accelerator using theengine sound as the reference.
– It is good to start with the image that you are starting to drive on asnowy road.

4

The Energy Conservation Center Japan(2) Cruise : Driving with Little
Acceleration/Deceleration[On general roads...]• Rather than the traveling speed, be conscious ofcontrolling the change in speed.
– Don’t be over-concerned about traveling at a constant speed.

• Keep an appropriate distance between vehicles, while
joining the flow of traffic.
– Make gentle adjustments to the speed by accelerator control[On the Highways...]• When you are not in a hurry, keep your driving speedslower.
– Increasing your speed by 10km/h results in an approximately 10%
increase of fuel consumption.
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The Energy Conservation Center Japan(3) Deceleration: Releasing Your Foot
from the Accelerator EarlyA running vehicle will continue to proceed due to cruising for some distanceeven after you release your foot from the accelerator. This allows your car
travel with less amount of fuel.
Release the accelerator

Distance coveredby cruising:

200 m

Stopping position

Fuel consumption reduction effect = 6-10 cc

When descending inclines, make use of engine braking. The supply of fuelmay be stopped (fuel cut function).
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The Energy Conservation Center Japan(4) Stop : Idling Stop Operation

Urbanareas

Outside ofcities(Reduced fuelconsumption rate)

stop time
Percentage of idling stop timestop time(Reduced fuelconsumption rate)

Percentage of idling stop time7