Nokia testing center
Nokia Testing Center
On the Nokia Testing Center, Nokian Tyres simulates almost all driving situations on northern roads. Testing is conducted at Nokia from April to November. Spreading over an area of 30 hectares, the testing center is constantly being developed to meet the challenges of difficult conditions as well the demands of the future.
1. Wet handling
Wet handling tests are used to evaluate how a tyre functions on awet road. The test driver assesses the tyre’s functionality, handling properties and consistency. These assessments are supplemented by lap times on the track.
- length 500 m- width 5 m- curve radiuses 35-50 m- automatic sprinklers
2. Wet grip, circle
The wet circle is used to measure a tyre’s lateral grip on wetasphalt. Lap times are recorded on the track, in addition to which the test driver evaluates the tyre’s behaviour.
- circle radius 40 m
3. Wet grip, braking
A tyre’s braking ability on a wet road can be tested using four different surface types. The test measures a tyre’s braking distance with ABS and locked wheel braking.
- length 230 m- width 13 m- four different surface types: standard (nordic) asphalt, smooth (Central European) asphalt, rough asphalt, concrete
4. Longitudinal aquaplaning
Longitudinal aquaplaning is tested on a track that features an 80-metre tank in which test cars are driven in a straight line. The results are derived from the test drivers’ subjective assessments and objective aquaplaning speed measurements.
- length 80 m- width 3 m - maximum water depth in tank 15 mm
5. Lateral aquaplaning
Lateral aquaplaning tests are used to measure a tyre’s ability to resist aquaplaning in a curve. Lateral aquaplaning is tested on acircle track.
- length 20 m- width 5 m- radius 100 m- water depth 8 mm
- track inclination 1.5%
6. Handling track
On the handling track, test drivers try out and evaluate tyres’driving properties and behaviour in varying conditions. Driving speeds may reach about 170 km/h.
- length 1800 m- width 6-20 m
- curve radiuses from 100 to 150 m
- subjective evaluation
7. Lane change/elk test/manoeuvrability test
The lane change and elk tests study tyres’ behaviour in sudden changes of direction. The manoeuvrability test measures a tyre’s performance in constant, sudden changes of direction. Test results are composed of driving speed measurements and free comments by the test drivers.
- length 400 m
- width 20 m
8. Noise, pass-by noise and cabin noisePass-by noise is measured in accordance with EU Directive2001/43/EC. Test results must remain within the stipulated limit values in order for a tyre to comply with the directive.The cabin noise test measures the decibel value produced by the tyres inside the vehicle. Results are supplemented by the test driver’s subjective assessment.
9. Slush planing
The slush planing test is used to gauge tyres’ behaviour and steerability on a track covered by slush. In addition to speed measurements, the test’s results include an evaluation of the tyres’properties by the driver. As a pioneer of the tyre branch Nokian Tyres has developed the methods of slush planing measurement. The slush track at the Nokia Testing Center is unique in the world.
- length of slush-covered area 20 m
- width of slush-covered area 5 m
- track radius 100 m
- adjustable slush depth, for example 40 mm
- measurement of slush’s water content
- measurement of maximum speed
10. Driving comfortThese tests are used to study a tyre’s behaviour on different surfaces and the effect of this on driving comfort.
11. Maintenance and office buildings
- garages for trucks and cars
- meeting rooms