New test method for fuel economy and emissions
What is WLTP?
The European Union has developed a new test called the Worldwide Harmonised Light Vehicle Test Procedure (WLTP) which came into effect on 1st September 2017 for new type approvals and 1 September 2018 for all vehicles. This will replace the current New European Driving Cycle (NEDC) test procedure for establishing the official Fuel Consumption and CO2 emissions of new cars.
The new WLTP laboratory test will also be supplemented by an emissions test that measures pollutants directly on the road: RDE (Real Driving Emissions) and was brought in to the new testing regime to provide a closer representation of ‘real-world’ fuel consumption and CO2 figures and provide model specific values at the point of sale.
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What is RDE?
This takes place on real roads, the RDE test compliments lab tests by measuring that a car delivers low pollutant emissions on the road.
Real driving emission (RDE) tests will measure the pollutants, such as NOx, emitted by cars while driven on the road. RDE will not replace laboratory tests, such as the current NEDC and the future WLTP but it will be additional to them. Europe will be the first region in the world to introduce such on-the-road testing, marking a major leap in the testing of car emissions.
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Introducing greater clarity
Everyday tests, realistic results
The new WLTP tests will ensure that lab measurements now better reflect the situations you will experience in everyday life. This means that fuel consumption and emissions values displayed for new cars are a far better representation of what you are actually likely to achieve.
At Toyota, we welcome the change to WLTP, which will provide our customers with a more accurate basis for calculating fuel economy and emissions. As a leader in clean mobility, we’ve spent decades researching how to make vehicles that are kinder to the environment, producing technologies such as hybrid that have proved their value in reducing greenhouse gas emissions, and helping the move towards a low carbon society.
“Hybrid is the backbone of our powertrain programme and will help us cut our vehicle carbon emissions by 90% by 2050 compared to 2010.”
Dr. Johan van Zyl, President and CEO of Toyota Motor Europe
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