WHAT IS WLTP?
WLTP is a global harmonised standard to determine light-duty vehicles' levels of CO2 emissions and other pollutants, as well as their fuel or energy consumption.
WHY IS WLTP ON THE WAY?
Because the NEDC (New European Driving Cycle) - the current measuring cycle last updated in 1997 - has long been criticised by specialists and the public for the unrealistic data it produces (the test cycle is too lenient, doesn't respond to current traffic and doesn't take optional equipment into account).
WHAT DOES WLTP DELIVER?
The new WLTP test cycle delivers consumption and CO2 emission figures better aligned with reality. The new WLTP driving cycle is faster, longer and more dynamic in comparison to the NEDC and takes optional equipment into account.
WHEN WILL ŠKODA START USING IT?
WLTP was introduced on 1 September 2017. Since then, all new vehicle types have needed WLTP values (this applies only to new vehicle homologation). From 1 September 2018, all new registered vehicles will require WLTP values. ŠKODA will have its first WLTP data in July 2018.
WHO’S INTRODUCING WLTP?
Legend to the map:
Green - European Union (28 countries)
Light grey - other 4 European countries (Switzerland, Liechtenstein, Norway, Iceland)
Black - Candidate countries: Turkey (WLTP applies for imported vehicles; for locally produced vehicles NEDC applies), Israel and outlying EU regions (still unclear): Réunion Island, Martinique, Guadeloupe, French Guiana, St. Martin, Mayotte
Dark grey - Partial implementation (planned): South Korea, Japan (WLTP without "extra-high" test cycle phase), India, China (CO2 emissions only, NEDC is used for consumption figures)
WLTP V NEDC
ALL IN THE DETAIL…
|COMPARISON Duration||NEDC 20 min.||WLTP 30 min.|
|COMPARISON Distance||NEDC 11 km||WLTP 23 km|
|COMPARISON Maximum speed||NEDC 120 km/h||WLTP 131 km/h|
|COMPARISON Average speed||NEDC 34 km/h||WLTP 47 km/h|
|COMPARISON Phases||NEDC 2 phases: urban and extra-urban driving||WLTP Up to 4 phases: “Low”, “Medium”, “High” and “Extra-High”|
|COMPARISON Starting temperature||NEDC 23 °C||WLTP 14 °C|
|COMPARISON Idling percentage||NEDC 25% idling time||WLTP 13% idling time|
|COMPARISON Optional equipment||NEDC No consideration of optional equipment||
Optional equipment is taken into consideration in
terms of weight, aerodynamics and standby power
WLTP requires a higher test mass for vehicles (15% of the maximum payload of the vehicle).
WLTP is more comprehensive than NEDC. WLTP takes additional equipment into account, e.g. bigger wheels, GPS, and spoilers. This influence on CO2 and consumption is measured by the impact the equipment has on rolling resistance, aerodynamics and weight.
RDE and PEMS
REAL DRIVING EMISSIONS (RDE)
RDE stands for Real Driving Emissions and describes the on-road measuring procedure, i.e. it is carried out on the road rather than under standardised test conditions on a test rig, as is the case with WLTP. The WLTP Directive takes RDE into account in the verification of vehicles in use.
PORTABLE EMISSIONS MEASUREMENT SYSTEM (PEMS)
In RDE tests, exhaust gas emissions - NOx (nitrogen oxide), particles (fine dust) and other - are measured during an actual drive on the road using a Portable Emissions Measurement System (PEMS).