In France, the share of transport in greenhouse gas emissions is 29%. In other words, it is the most polluting sector even before energy consumption at home. Polluting 2,5 times more than heavy goods vehicles, private vehicles are the most affected by this phenomenon. At a time when the emphasis is on environmentally friendly behavior, driving in an ecological manner has also become a major concern for everyone. Tires, important elements of driving safety, help reduce the ecological footprint of a vehicle. Find out how better tires are key to greener driving.
The influence of tires on the fuel consumption
Many may not know it, but the condition of the tires is responsible for higher fuel consumption (they can affect from 20% to 30%!). It is therefore essential to check the condition of its tires before hitting the road to reduce fuel consumption. This gesture is not only good for your wallet, but also for the planet.
The overconsumption caused by tires goes through several parameters:
The inflation or the good tire pressure
As tires are made up of air, their inflation decreases as you drive. However, under-inflated tires are not only bad in terms of safety - they lead to poor handling and a risk of bursting - they also generate a 4% increase in fuel consumption. It is therefore essential to monitor tire inflation on a regular basis.
Please note that tire inflation cannot be improvised. It is necessary to check the indications which appear on the sticker placed on the interior upright of the left front door or in the log book. Then over inflate the tires at 0,2 bar above the value indicated by the manufacturer.
Tire pressure is checked approximately every 1 kilometers or monthly. It is necessary think about changing your tires when they are in bad shape for optimize your safety and fuel consumption. Note that in hiver, greater vigilance is required due to the weather. Snow, cold and sleet can help reduce tire pressure.
Just like under inflation, too high tire pressure can also pose a safety risk. Hence the importance of making no mistake about tire pressure.
If you experience abnormal vibrations at the wheel or if your wheels wear out faster, your tires are most likely to be out of balance. Balancing the tires is necessary after changing them, in order to distribute their weight evenly over their entire circumference.
The consequences of an unbalanced wheel are numerous. Not only does it impact driving comfort by causing more fatigue for the driver, but it also causes premature and abnormal tire wear andoverconsumption of fuel, which will increase your carbon footprint.
To limit the ecological footprint of a car, it is therefore essential to check the tire balance regularly. In addition to the obligation to carry out this operation at each tire change, it is also recommended to have the geometry or parallelism of the tires checked once a year or every 10 to 000 km.
There are several tire sizes suitable for different types of vehicles on the market. Note that there is a link between tire size and the vehicle's fuel consumption. Large tires lead to overconsumption of fuel due to the fact that the contact surface on the road is also large. But the counterpart is the performance gain. Wider tires are more efficient, especially on the highway.
Conversely, small tires can reduce fuel consumption by 0,4l / 100 km. But beware, this gain can turn into a loss if the vehicle is fitted with tires of different sizes. Do not hesitate to ask your mechanic if it is possible to change the size of your tires to reduce your fuel consumption.
Tire rolling resistance
Rolling resistance refers to the energy the vehicle needs to keep the tires moving on a surface, or simply the energy consumed when the tires are in contact with the road. This value reaches around 20% in an average passenger car, you read that right: 20% of energy (and therefore consumption) is lost at the level of the 4 tires! It is very important but it is the guarantee of comfort and security!
It is a key factor in a car's fuel consumption. The higher the rolling resistance of the tires, the higher the fuel consumption. Several factors can increase the rolling resistance of tires, including underinflation or tire wear.
To overcome this problem, manufacturers today offer tires with low rolling resistance or economical tires. They are known to allow a fuel saving of 4 to 6%. In addition, they also make it possible to reduce the rate of CO2 emitted into the atmosphere.
Since November 2012, motorists have had a simple way to compare the tires sold on the market. This is European labeling. This one sets up a simple pictogram going from the letter A to the letter G according to three criteria:
- fuel consumption,
- wet grip,
- the noise emitted while driving.
For all these criteria, Class A tires are considered the best, in other words the best in terms of fuel consumption, wet grip and noise pollution. To minimize fuel consumption, it is therefore necessary to favor class A tires.
A ecological driving to reduce fuel consumption
Regularly calculating fuel consumption is not enough to drive economically. When we talk about ways to reduce fuel consumption, we should also talk about the concept of ecological driving.
Some simple techniques allow the driver to reduce his impact on fuel consumption, and therefore on the environment. Among them, we can cite the anticipation of braking by adopting a constant driving speed. Note that regular acceleration and braking increase fuel consumption significantly. It is therefore necessary to maintain a constant speed. Anticipation of braking also involves planning maneuvers in advance, controlling the road and the surroundings.
Finally, other methods are also involved in la reduction of the ecological impact of driving. Among them is the lightening of the vehicle. Any additional weight increases a vehicle's fuel consumption because it requires more energy.
In addition, moderate use should be made of comfort equipment, such as air conditioning or heating, which tend to increase fuel consumption.