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On January 15-17, 2024, the final seminar of the ELANORE project took place at the Kłanino Palace near Gdańsk. During this seminar, the assumptions of the project and the results obtained were presented. The seminar was conducted in a hybrid system - some participants came to Kłanin (despite very difficult weather conditions) and the rest took part online. A total of 43 participants from Poland, Norway, Belgium, the Netherlands, France, Germany, Italy and Sweden participated in the seminar. They represented the European Commission, global tire and car manufacturers, highway network managers and numerous research institutes related to vehicles and road traffic. The seminar included presentations on the imperfections of the current labeling system related to tire noise and rolling resistance, as well as the results of work aimed at significantly increasing the representativeness and usefulness of these labels. After the presentation, a discussion ensued, which showed that all interested parties support efforts to implement the results obtained. In terms of rolling resistance, the ELANORE project ended with the development of proposals for changes regarding the temperature at which tires are tested, the texture of the drums of roadwheel facilities, and changing the CRR ranges associated with individual tire classes to more realistic ones. In terms of tire/road noise, changes were proposed regarding corrections related to temperature and the properties of the standard ISO surface. During the informal discussions, it was also agreed that a radical change in the method of testing the noise of car tires should be pursued by introducing a laboratory method, as harmonized as possible with the method of testing the rolling resistance of tires.
The Final Seminar of ELANORE project will take place on Kłanino, near Gdańsk on 16th-17th of January 2024.
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On the 27th of September, 2023 Gdańsk University of Technology hosted representatives of the Norwegian Embassy, Norway Grants and NCBR as part of the ELANORE project. The guests learned about the genesis of the project, the status of its implementation and plans for the coming months. They also got acquainted with the laboratories of the Faculty of Mechanical Engineering and Shipbuilding, which specialize in testing car tires.
As a result of the work carried out in WP3, the third version of a simple, “geometrical” standard pavement for testing tire rolling resistance was developed. Verification tests will be carried out after the replicas of this surface are made.
The third version of simple, “geometrical” standard pavement.
In April 2023, rolling resistance tests were carried out on 10 passenger car tires in Sweden. The tests were conducted using a modernized R2 Mk.3 experimental trailer, which was rebuilt as part of the ELANORE project (WP1). Thanks to the reconstruction of the driving system, the measuring system is no longer loaded during the transport of the trailer, which reduces the wear of this system and protects it from damages. During the tests in Sweden, measurements of the temperature of the inside of the tires and their rolling resistance were made on the DAC16 pavement. In cooperation with the Swedish National Road and Transport Research Institute (VTI), the results of these tests will be compared with the results obtained on the world's unique Flat Bed Tire Test Facility, which is in use at VTI. The DAC16 surface will be laid on the flat bed, which will allow to compare trailer results with laboratory results. In the next stage, at the Gdańsk University of Technology, the same tires will be tested on a roadwheel facility with its drum covered with a replica of the DAC16 surface.
Test trailer R2Mk3 during measurements in Sweden
Flat Bed Tire Test Facility (VTI)
December 2022 Laboratory tyre/road noise measurements on the roadwheel facility on the replica of the SMA8 road surface have been completed.
August 2022 Laboratory tyre/road noise measurements on the roadwheel facility on the replica of the ISO road surface have been completed.
July 2022 Tyre noise measurements were made according to the Regulation 117 in Norway on the MA11 (soft asphalt) test section located on the Fv1190 road near Skjeberg …
… and on the SMA16 pavement located on the Fv171 road near the city of Sørum.
On the same test sections, noise tests were carried out according to the CPX method with the use of two measuring trailers: Polish and Norwegian. Road Fv1190 near Skjeberg …
… and the Fv171 road near the city of Sørum.
Tyre noise measurements were also carried out according to Regulation 117 in Poland in 2 locations: on the SMA8 surface test section located on a local road near Bartoszylas …
... and on SMA11 on the S6 high speed road near Szemud.
On the same test sections, noise tests were also carried out according to the CPX method using the Tiresonic Mk5 trailer.
July 2022 Continuation of the Round Robin Test from last year. Tests were carried out on the selected fourth ISO test track. This time the weather was good and all planned measurements were made. As in the previous year, tyre noise tests were conducted both according to the methodology of Regulation 117...
... as well as according to the CPX method using the Tiresonic Mk5 trailer.
June 2022 On the same test section, tyre/road noise tests were performed according to the CPX method using the Tiresonic Mk5 trailer.
During the weekend of May 30 - June 1, rolling resistance measurements were carried out on the CONTIDROM test track in Germany. During the tests performed with R2Mk.2 trailer road texture influence on rolling resistance was investigated. A total of 22 tires were tested on four very different road surfaces.
May 2022 Tyre noise measurements were made according to the Regulation 117 on the EACC road surface on the S61 road near Ełk in Poland.
April 2022 The selection of locations of conventional road surfaces in Poland and Norway, where tyre noise tests will be carried out according to the Regulation 117 and using the CPX method, was approved. Two test sections were selected in Norway and three in Poland.
December 2021. Modification of the roadwheel facility has been completed. The drive system, torque sensor and temperature control system have been modernized. Sound reflection was also reduced by covering the lab walls with a layer of acoustic foam. See drawing.
Roadwheel facility after modernization
Work has commenced on the development of a unified drum-mounted test surfaces that will result in more realistic tire/drum interaction during tire rolling resistance tests. The first variant of such a surface is shown in the figure below.
First variant of texture for replica road surface proposed for rolling resistance measurements.
Analyzes of the results of laboratory and road tests carried out in 2021 are also carried out, which include: noise and rolling resistance tests of tires performed on a roadwheel facility on a steel drum as well as on a drum covered with replicas of ISO, SMA8 and Surface Dressing surfaces, also noise and tire rolling resistance tests performed on roads in Poland and Germany
August 2021 Round Robin Test on the ISO test tracks. During 2 weeks of intensive work, tyre noise measurements were performed on 3 ISO test tracks.
Measurements were made according to the methodology specified in Regulation 117...
… and according to the CPX method using the Tiresonic Mk5 trailer.
Unfortunately, due to the rainy weather, it was not possible to perform all planned noise tests. It will be necessary to continue the Round Robin Test in the following year.
July 2021 The modernization of the CPX trailer has been completed. Tiresonic Mk4 became Tiresonic Mk5.
May 2021 The modernization of chamber of the roadwheel facility for noise and tire rolling resistance testing has been completed. The acoustic characteristics of the chamber was improved by installing sound-absorbing panels on its walls and ceiling. Laboratory noise measurements of purchased tyres on a drum equipped with an ISO road surface replica will start soon.
April 2021 A test car, Skoda Superb Combi 2.0 TSI 140 kW (190 HP), has been purchased to be used for all tyre noise tests in the ELANORE project. This car meets the requirements of the UNECE Regulation No. 117, according to which tyre external noise measurements will be carried out. It will also be used for noise measurements using the CPX method by towing the specialized measuring trailer.
February 2021 Modernization of the Tiresonic Mk4 trailer for tyre/road noise testing with the CPX method has begun. As part of the modernization, the trailer will be thoroughly rebuilt, its frame will be strengthened, electric trailer axle lifts will be installed, the protective chamber will be renovated and the absorbent material inside it will be replaced, the entire electrical and measuring system will be replaced, and the trailer will be equipped with new measuring sensors.
January 2021 The selection of 3 ISO test tracks in Northern Europe for the Round Robin Test has been approved. Due to the terms of the signed contracts, their location cannot be disclosed.
November 2020 - laboratory and road tests of rolling resistance of 20 car tires have started. The tests are carried out at temperatures from - 15 C to + 25 C to determine whether the tests carried out only at 25 C, as required by the current standards, allow for an objective assessment of tires in the climatic conditions of Northern and Central Europe. The modernization of the drum facility and the Tiresonic Mk. 4 test trailer were also started.
Road measurements of tire rolling resistance
Drum measurements of tire rolling resistance
Replica of coarse surface dressing - for noise and rolling resistance measurements
Test facility for tireroad noise and rolling resistance measurements
October 2020 The selection and purchase of car tyres, which will be tested for noise and rolling resistance within this project, has started. It is planned to purchase about 40 tyres. Two tyre sizes were selected: 215/55R17 (for noise tests) and 205/55/16 (for rolling resistance tests).
