natgillin/translations-raw huggingface dataset:
The tow vehicle and trailer or the tyre test vehicle may be optionally equipped with a pavement-wetting system, less the storage tank, which, in the case of the trailer, is mounted on the tow vehicle.
Preglednica 4
The water being applied to the pavement ahead of the test tyres shall be supplied by a nozzle suitably designed to ensure that the water layer encountered by the test tyre has a uniform cross section at the test speed with a minimum splash and overspray.
Preskusna pnevmatika
The nozzle configuration and position shall ensure that the water jets are directed towards the test tyre and pointed towards the pavement at an angle of 20° to 30°.
μpeak,ave(R) = Ra skladno s preglednico 3
The water shall strike the pavement 250 mm to 450 mm ahead of the centre of tyre contact.
0,85 je največji koeficient zavorne sile za referenčno pnevmatiko v referenčnih pogojih,
The nozzle shall be located 25 mm above the pavement or at the minimum height required to clear obstacles which the tester is expected to encounter, but in no case more than 100 mm above the pavement.
a = – 0,4232 in b = – 8,297 za običajne pnevmatike, a = 0,7721 in b = 31,18 za zimske pnevmatike (a je izražen kot (1/°C)).
The water layer shall be at least 25 mm wider than the test tyre tread and applied so the tyre is centrally located between the edges.
Pnevmatike razredov C2 in C3
Water delivery rate shall ensure a water depth of 1,0 ± 0,5 mm and shall be consistent throughout the test to within ± 10 per cent.
Površina je gosta asfaltna površina z enakomernim naklonom, ki ne presega 2 odstotkov, in pri preskusu z ravno letvijo dolžine 3 m ne odstopa za več kot 6 mm.
The volume of water per unit of wetted width shall be directly proportional to the test speed.
Tlak na preskusni površini je enotne starosti, sestave in obrabljenosti.
The quantity of water applied at 65 km/h shall be 18 l/s per meter of width of wetted surface in case of a water depth of 1,0 mm.
Na preskusni površini ne sme biti nevezanega materiala ali tujih oblog.
The test tyre shall be mounted on the test rim declared by the tyre manufacturer.
Največji premer zrnc peska znaša 8 mm do 13 mm.
A proper bead seat should be achieved by the use of a suitable lubricant.
Globina peska, izmerjena v skladu s standardoma EN13036-1:2001 in ASTM E 965-96 (ponovno odobreno v letu 2006) je 0,7 ± 0,3 mm.
Excessive use of lubricant should be avoided to prevent slipping of the tyre on the wheel rim.
Vrednost trenja površine za namočeno stezo se po presoji pogodbenice določi z eno od naslednjih metod.
The test tyres/rim assemblies shall be stored in a location for a minimum of two hours such that they all have the same ambient temperature prior to testing.
Metoda standardne referenčne preskusne pnevmatike (SRTT)
They should be shielded from the sun to avoid excessive heating by solar radiation.
Povprečni največji koeficient zaviranja (μ peak ave) preskusa z referenčno pnevmatiko po standardu ASTM E1136 -93 (ponovno odobreno 2003) (preskusna metoda z uporabo priklopnika ali vozila za preskušanje pnevmatik iz točke 2.1) je 0,7 +/– 0,1 (pri 65 km/h in 180 kPa).
For tyre break-in, two braking runs shall be performed under the load, pressure and speed as specified in paragraphs 4.2.5.2, 4.2.5.3 and 4.2.7.1 respectively.
Izmerjene vrednosti se zaradi vpliva temperature korigirajo, kot sledi:
The test load on the test tyre is 75 ± 5 per cent of the tyre load capacity.
pbfc = pbfc (izmerjen) + 0,0035 · (t – 20),
The test tyre cold inflation pressure shall be 180 kPa for standard-load tyres.
pri čemer je „t“ temperatura površine namočene steze v stopinjah Celzija.
For extra-load tyres, the cold inflation pressure shall be 220 kPa.
Preskus se izvede s pomočjo voznih pasov in dolžine steze, ki se uporabi za preskus oprijema na mokri podlagi.
Preparation of the tow vehicle and trailer or the tyre test vehicle
Povprečno nihajno število (BPN – British Pendulum Number), izmerjeno z metodo z nihalom v skladu s standardom ASTM E 303-93 (ponovno odobreno v letu 2008) in z uporabo ploščice, določene v standardu ASTM E 501-08, je po korekciji temperature (50 ± 10).
Trailer
BPN = BPN (izmerjena vrednost) – (0,0018 · t2) + 0,34 · t – 6,1,
For one axle trailers, the hitch height and transverse position shall be adjusted once the test tyre has been loaded to the specified test load in order to avoid any disturbance of the measuring results.
pri čemer je: t temperatura namočene vozne površine v stopinjah Celzija.
The longitudinal distance from the centre line of the articulation point of the coupling to the transverse centre line of the axle of the trailer shall be at least ten times the ‘hitch height’ or the ‘coupling (hitch) height’.
Učinki obrabe drsne ploščice: ploščico je treba zaradi maksimalne obrabe odstraniti, ko doseže obraba na stičnem robu drsnika 3,2 mm v ravnini drsnika ali 1,6 mm navpično nanjo.
Instrumentation and equipment
Preveriti je treba doslednost BPN za površino preskusne steze pri meritvah oprijema na mokri podlagi na standardnem vozilu.
Install the fifth wheel, when used, in accordance with the manufacturer's specifications and locate it as near as possible to the mid-track position of the tow trailer or the tyre test vehicle.
Na voznih pasovih steze, ki se uporabi med preskusi oprijema na mokri podlagi, se BPN izmeri v presledkih 10 metrov vzdolž dolžine voznih pasov.
The following procedure applies for each test run:
BPN se izmeri petkrat na vsaki točki, koeficient variacije povprečij BPN pa ne sme presegati 10 odstotkov.
The tow vehicle or the tyre test vehicle is driven onto the test track in a straight line at the specified test speed 65 ± 2 km/h.
Homologacijski organ preveri značilnosti steze na podlagi dokazov, ki so navedeni v poročilih o preskusu.
The recording system is launched.
Priporočljivo je, da se močenje s strani steze uporablja ves čas preskušanja.
Water is delivered to the pavement ahead of the test tyre approximately 0,5 s prior to brake application (for internal watering system).
Globina vode je med 0,5 in 2,0 mm.
The trailer brakes are activated within 2 metres of a measurement point of the wetted frictional properties of the surface and sand depth in accordance with paragraphs 3.1.4 and 3.1.5 above.
Veter ne sme vplivati na namočenost površine (dovoljena je zaščita pred vetrom).
The rate of braking application shall be such that the time interval between initial application of force and peak longitudinal force is in the range 0,2 s to 0,5 s.
Temperatura okolice in temperatura namočene površine sta med 5 °C in 35 °C in med preskusom ne odstopata za več kot 10 °C.
The recording system is stopped.
Da bi zajeli velikosti pnevmatik, ki jih je mogoče namestiti na gospodarska vozila, se za merjenje relativnega indeksa oprijema na mokri podlagi uporabijo tri velikosti standardne referenčne preskusne pnevmatike (SRTT):
A number of test runs are made in order to measure the wet grip index of the candidate tyre (T) according to the following procedure, whereby each test run shall be made from the same spot on the test track and in the same direction.
SRTT 315/70R22,5 LI=154/150, ASTM F2870;
First, the reference tyre is tested.
SRTT 225/75 R 16 C LI=116/114, ASTM F2872.
After at least six valid measurements are performed in accordance with paragraph 4.2.7.1 above, the reference tyre is replaced by the candidate tyre.
Tri velikosti standardne referenčne preskusne pnevmatike se uporabijo za merjenje relativnega indeksa oprijema na mokri podlagi, kot je prikazano v naslednji preglednici:
After six valid measurements of the candidate tyre are performed, two more candidate tyres may be measured.
Pri pnevmatikah razreda C3
The test cycle is closed by six more valid measurements of the same reference tyre as at the beginning of the test cycle.
Skupina ozkih pnevmatik
The run order for a test cycle of three candidate tyres (T1 to T3) plus the reference tyre (R) would be the following:
Skupina širokih pnevmatik
The tyre peak braking force coefficient (μpeak) is the highest value of μ(t) before lockup occurs calculated as follows for each test run.
PRESKUSNI POSTOPEK
Analogue signals should be filtered to remove noise.
Primerjalni oprijem na mokri podlagi se določi z uporabo:
Digitally recorded signals must be filtered using a moving average technique.
priklopnika ali vozila za ocenjevanje pnevmatik za posebne namene ali
μ(t) is the dynamic tyre braking force coefficient in real time;
vozila standardne proizvodnje (kategorija M2, M3, N1, N2 ali N3), kot je opredeljen v Konsolidirani resoluciji o konstrukciji vozil (R.E.3) v dokumentu ECE/TRANS/WP.29/78/Rev.3, odst.
fh(t) is the dynamic braking force in real time, in N;
2.
fv(t) is the dynamic vertical load in real time, in N.
Postopek s priklopnikom ali vozilom za ocenjevanje pnevmatik za posebne namene
The μpeak coefficient of variation is calculated as follows:
Meritve se izvajajo na pnevmatikah, nameščenih na priklopniku, ki ga vleče vozilo, ali na vozilu za preskušanje pnevmatik.
(Standard deviation/Average) × 100
Močno se aktivira zavora na preskusnem položaju, dokler se ne ustvari zadosten zavorni navor za povzročitev največje zavorne sile, ki nastopi pred blokado koles pri preskusni hitrosti 50 km/h.
For the reference tyre (R): If the coefficient of variation of the peak braking force coefficient (μpeak) of the reference tyre is higher than 5 per cent, all data should be discarded and the test repeated for all test tyres (the candidate tyre(s) and the reference tyre).
Priklopnik, skupaj z vlečnim vozilom, ali vozilo za ocenjevanje pnevmatik izpolnjuje naslednje zahteve:
For the candidate tyre(s) (T): The coefficient of variation of the peak braking force coefficient (μpeak) is calculated for each candidate tyre.
sposobna sta preseči zgornjo mejno vrednost preskusne hitrosti 50 km/h in ohranjati zahtevo glede preskusne hitrosti 50 ± 2) km/h na najvišji ravni uporabe zavornih sil;
If one coefficient of variation is higher than 5 per cent, the data should be discarded and the test repeated for this candidate tyre.
opremljena sta z osjo, ki zagotavlja preskusni položaj s hidravlično zavoro in sprožilnim sistemom, ki se lahko po potrebi upravlja na preskusnem položaju iz vlečnega vozila.
Calculation of the adjusted average peak braking force coefficient
Zavorni sistem mora biti sposoben zagotavljati zadosten zavorni navor, da se doseže največji koeficient zavorne sile pri različnih velikostih pnevmatik in obremenitvah pnevmatik, ki jih je treba preskusiti;
The average peak braking force coefficient of the reference tyre used for the calculation of its braking force coefficient is adjusted according to the positioning of each candidate tyre in a given test cycle.
sposobna sta ohranjati vzdolžno nastavitev (stekanje) ter previs preskusnega kolesa in sklopa pnevmatik med celotnim preskusom znotraj ± 0,5° statičnih podatkov, dobljenih v pogojih obremenitve preskusne pnevmatike;
This adjusted average peak braking force coefficient of the reference tyre (Ra) is calculated in accordance with Table 3 where R1 is the average peak tyre braking coefficient in the first test of the reference tyre (R) and R2 is the average peak tyre braking coefficient in the second test of the same reference tyre (R).
V primeru vključenosti sistema za močenje steze:
Table 3
sistem mora dovajati vodo tako, da sta pnevmatika in površina steze pred pnevmatiko namočeni pred začetkom zaviranja in med celotnim trajanjem preskusa.
Calculation of the average peak braking coefficient (μpeak,ave)
Sestava in položaj šobe zagotavljata, da so vodni curki usmerjeni proti preskusni pnevmatiki in nagnjeni proti tlaku pod kotom 15° do 30°.
Table 4
Šoba je nameščena 100 mm nad tlakom ali na najmanjši višini, ki je potrebna za izogibanje oviram, ki jih lahko pričakuje preskuševalec, nikakor pa več kot 200 mm nad tlakom.
Test tyre
Količina vode, nanesene pri 50 km/h, znaša 14 l/s na meter širine namočene površine.
μpeak,ave(R) = Ra as per Table 3
Nazivne vrednosti stopnje močenja se ohranjajo pri ± 10 odstotkih.
is the wet surface reference temperature condition t 0 =
Preskusni postopek
20 °C for normal tyres t0 = 10 °C for snow tyres μ peak,ave(R0) =
Preskusne pnevmatike se namestijo na platišča, ki ustrezajo specifikaciji priznane organizacije za standardizacijo pnevmatik in platišč iz Dodatka 4 k Prilogi 6 k temu pravilniku.
0,85 is the peak braking force coefficient for the reference tyre in the reference conditions
Zagotoviti je treba pravilno naleganje roba z uporabo primernega maziva.
a = – 0,4232 and b = – 8,297 for normal tyres, a = 0,7721 and b = 31,18 for snow tyres [a is expressed as (1/°C)]
Tik pred preskušanjem je treba preveriti, ali je v preskusnih pnevmatikah pri temperaturi okolice (hladno) predpisan tlak.
The surface shall be a dense asphalt surface with a uniform gradient of not more than two per cent and shall not deviate more than 6 mm when tested with a 3 m straightedge.
tlak, označen na bočni steni pnevmatike.
The test surface shall have a pavement of uniform age, composition, and wear.
Če Pr ni označen na bočni steni, je osnova tlak, ki je naveden v priročnikih z veljavnimi standardi za pnevmatike in ustreza največji nosilnosti za enojno pnevmatiko,
The test surface shall be free of loose material or foreign deposits.
statična preskusna obremenitev pnevmatike,
The maximum chipping size shall be from 8 mm to 13 mm.
največja masa, povezana z indeksom nosilnosti pnevmatike.
The sand depth measured as specified in EN13036-1:2001 and ASTM E 965-96 (reapproved 2006) shall be 0,7 ± 0,3 mm.
Utekanje pnevmatik se izvede z dvema potekoma zaviranja.
The surface friction value for the wetted track shall be established by one or other of the following methods according to the discretion of the Contracting Party.
Pnevmatika stoji najmanj dve uri ob preskusni stezi, tako da se stabilizira pri temperaturi okolice preskusne steze.
Standard reference test tyre (SRTT) method
Med pripravo na preskus pnevmatike ne smejo biti izpostavljene neposredni sončni svetlobi.
The average peak braking coefficient (μ peak average) of the ASTM E1136 -93 (reapproved 2003) reference tyre (Test method using a trailer or a tyre test vehicle as specified in clause 2.1) shall be 0,7 +/– 0,1 (at 65 km/h and 180 kPa).
Obremenitev pri preskušanju je 75 ± 5 odstotkov vrednosti, ki ustreza indeksu obremenitve.
The measured values shall be corrected for the effects of temperature as follows:
Malo pred preskušanjem se steza pripravi tako, da se izvede vsaj deset preskusov zaviranja pri 50 km/h na delu steze, ki se bo uporabil za program preskušanja, pri čemer se uporabi pnevmatika, ki je ta program ne zajema.
pbfc = pbfc (measured) + 0,0035 · (t – 20)
Neposredno pred preskušanjem se preveri tlak v pnevmatikah in po potrebi popravi na vrednosti, navedene v odstavku 2.1.2.1.
Where ‘t’ is the wetted track surface temperature in degrees Celsius.
Preskusna hitrost je 50 ± 2 km/h in se ohranja v okviru teh mejnih vrednosti skozi celotni potek preskusa.
The test shall be conducted using the lanes and length of the track to be used for the wet grip test.
Smer preskusa je v vsakem nizu preskusov enaka; enaka je tudi za preskusno pnevmatiko, ki se uporabi za SRTT, s katero se delovanje primerja.
For the trailer method, testing is run in such a way that braking occurs within 10 metres distance of where the surface was characterised.
Voda se dovaja na tlak pred preskusno pnevmatiko približno 0,5 s pred aktiviranjem zavor (pri notranjem sistemu za močenje).
1.1.2.
Zavore sklopa preskusnega kolesa se uporabijo tako, da se doseže največja zavorna sila med 0,2 s in 1,0 s zaviranja.
British Pendulum Number (BPN) method
Pri novih pnevmatikah se rezultati prvih dveh potekov zaviranja za utekanje pnevmatik izločijo.
The averaged British Pendulum Number (BPN) method as specified in ASTM E 303-93 (reapproved 2008) using the Pad as specified in ASTM E 501-08 shall be (50 ± 10) BPN after temperature correction.
Za oceno delovanja katere koli pnevmatike v primerjavi z delovanjem SRTT je treba preskus zaviranja izvesti na istem delu preskusne steze.
BPN shall be corrected by the wetted road surface temperature.
Vrsti red preskušanja je:
Unless temperature correction recommendations are indicated by the British pendulum manufacturer the following formula can be used:
R1 – T – R2,
BPN = BPN (measured value) – (0,0018 · t2) + 0,34 · t – 6,1
R1 prvotni preskus SRTT,
Where: ‘t’ is the wetted road surface temperature in degrees Celsius.
R2 ponovni preskus SRTT
Effects of slider pad wear: the pad should be removed for maximum wear when the wear on the striking edge of the slider reaches 3,2 mm in the plane of the slider or 1,6 mm vertical to it.
T preskus preskušane pnevmatike, ki jo je treba oceniti.
Check the test track testing surface BPN consistency for the measurement of wet grip on a standard vehicle.
Pred ponovnim preskusom SRTT se lahko preskusijo največ tri preskušane pnevmatike, na primer:
In the lanes of the track to be used during the wet grip tests, the BPN shall be measured at intervals of 10 m along the length of the lanes.
R1 – T1 – T2 – T3 – R2.
The BPN shall be measured 5 times at each point and the coefficient of variation of the BPN averages shall not exceed 10 per cent.
Izračun največjega koeficienta zavorne sile, μpeak, za vsak preskus po naslednji enačbi:
The Type Approval Authority shall satisfy itself of the characteristics of the track on the basis of evidence produced in test reports.
μ(t) dinamični koeficient zavorne sile pnevmatike v realnem času,
The surface may be wetted from the track-side or by a wetting system incorporated into the test vehicle or the trailer.
fh(t) dinamična zavorna sila v realnem času, v N,
If a track-side system is used, the test surface shall be wetted for at least half an hour prior to testing in order to equalise the surface temperature and water temperature.
fv(t) dinamična navpična obremenitev v realnem času, v N.
It is recommended that track-side wetting be continuously applied throughout testing.
Z enačbo (1) za dinamični koeficient zavorne sile pnevmatike se izračuna največji koeficient zavorne sile pnevmatike, μpeak, pri čemer se določi najvišja vrednost μ(t) pred blokado.
The water depth shall be between 0,5 and 2,0 mm.
Analogni signali se zaradi odstranitve šuma filtrirajo.
The wind conditions shall not interfere with wetting of the surface (wind-shields are permitted).
Digitalno zapisani signali se lahko filtrirajo s tehniko drsečih povprečij.
The ambient and the wetted surface temperature shall be between 5 °C and 35 °C and shall not vary during the test by more than 10 °C.
Izračunati je treba povprečne vrednosti največjega koeficienta zaviranja (μpeak, ave) na podlagi povprečja rezultatov najmanj štirih veljavnih ponovljenih potekov preskusa za vsak komplet preskusnih in referenčnih pnevmatik za vse preskusne pogoje, če se preskusi opravijo v enem dnevu.
In order to cover the range of the tyre sizes fitting the commercial vehicles, three Standard Reference Testing Tyre (SRTT) sizes shall be used to measure the relative wet grip index:
Za referenčno pnevmatiko:
SRTT 315/70R22,5 LI=154/150, ASTM F2870
če je koeficient variacije največjega koeficienta zaviranja, ki se izračuna po formuli „standardno odstopanje/povprečje × 100“, za referenčno pnevmatiko večji od petih odstotkov, se vsi podatki izločijo, preskus pa se ponovi s to referenčno pnevmatiko.
SRTT 245/70R19,5 LI=136/134, ASTM F2871
Za preskušane pnevmatike:
SRTT 225/75 R 16 C LI=116/114, ASTM F2872
koeficienti variacije (standardno odstopanje/povprečje × 100) se izračunajo za vse preskušane pnevmatike.
The three standard reference testing tyre sizes shall be used to measure the relative wet grip index as shown in the following table:
Če je en koeficient variacije večji od petih odstotkov, se podatki za to preskušano pnevmatiko izločijo, preskus pa se ponovi.
For C3 tyres
Če je R1 povprečje največjega koeficienta zaviranja v prvem preskusu referenčne pnevmatike, R2 pa povprečje največjega koeficienta zaviranja v drugem preskusu referenčne pnevmatike, se v skladu z naslednjo preglednico izvedejo naslednje operacije:
Narrow family
Število kompletov preskušanih pnevmatik med dvema zaporednima potekoma preskusa z referenčno pnevmatiko
Wide family
Komplet preskušanih pnevmatik, ki jih je treba kvalificirati
For C2 tyres
Formula za izračun „Ra“
SNominal = Tyre nominal section width
Indeks oprijema na mokri podlagi (G) se izračuna po naslednji formuli:
TEST PROCEDURE
indeks oprijema na mokri podlagi (G) = μpeak,ave (T)/μpeak, ave (R).
The comparative wet grip performance shall be established using either:
Pomeni relativni indeks oprijema na mokri podlagi za zavorni učinek preskušane pnevmatike (T) v primerjavi z zavornim učinkom referenčne pnevmatike (R).
A trailer or special purpose tyre evaluation vehicle; or
Postopek za standardno vozilo
A standard production vehicle (M2, M3, N1, N2 or N3, category) as defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.) contained in ECE/TRANS/WP.29/78/Rev.3, para. 2.
Uporabiti je treba vozilo, ki ima dve osi in je opremljeno s protiblokirnim zavornim sistemom (npr. vozilo standardne proizvodnje kategorije M2, M3, N1, N2 ali N3).
Trailer or special purpose tyre evaluation vehicle procedure
ABS mora še naprej izpolnjevati zahteve glede izkoristka oprijema, opredeljene v ustreznih pravilnikih, v preskusih z različnimi nameščenimi pnevmatikami pa mora izkazovati primerljive in nespremenljive rezultate.
The measurements are conducted on (a) tyre(s) mounted on a trailer towed by a vehicle or a tyre test vehicle.
Upoštevajo se naslednje tolerance:
The brake on the test position is applied firmly until sufficient braking torque results to produce maximum braking force that will occur prior to wheel lockup at a test speed of 50 km/h.
za merjenje hitrosti, večja izmed naslednjih dveh vrednosti: ± 1 odstotek ali ± 0,5 km/h;
The trailer, together with the towing vehicle, or the tyre evaluation vehicle shall comply with the following requirements:
za merjenje razdalje: ± 1 × 10– 1 m.
Be capable of exceeding the upper limit for the test speed of 50 km/h and of maintaining the test speed requirement of (50 ± 2) km/h even at the maximum level of application of braking forces;
V notranjosti vozila se lahko uporabi prikaz izmerjene hitrosti ali razlike med izmerjeno hitrostjo in referenčno hitrostjo za preskus, ki vozniku omogoča prilagoditev hitrosti vozila.
Be equipped with an axle providing one test position having an hydraulic brake and actuation system that can be operated at the test position from the towing vehicle if applicable.
Poleg tega se lahko za shranjevanje meritev uporabi sistem za pridobivanje podatkov.
The braking system shall be capable of providing sufficient braking torque to achieve the peak brake force coefficient over the range of tyre sizes and tyre loads to be tested;
Pri določeni začetni hitrosti se zavore na obeh oseh hkrati aktivirajo dovolj močno, da se sproži ABS.
Be capable of maintaining longitudinal alignment (toe) and camber of the test wheel and tyre assembly throughout the test within ± 0,5° of the static figures achieved at the test tyre loaded condition;
Izračuna se povprečni pojemek (AD) med dvema določenima hitrostma, pri čemer je začetna hitrost 60 km/h, končna hitrost pa 20 km/h.
In the case a track wetting system is incorporated:
Oprema vozila
The system shall be able to deliver the water such that the tyre and track surface in front of the tyre are wetted before the start of braking and throughout the duration of the test.
Zadnja os je lahko opremljena z 2 ali 4 pnevmatikami.
The apparatus may be optionally equipped with a pavement-wetting system, less the storage tank, which, in the case of the trailer, is mounted on the tow vehicle.
Pri preskušanju referenčnih pnevmatik se na obe osi namestijo referenčne pnevmatike (skupno 4 ali 6 referenčnih pnevmatik, odvisno od zgoraj navedene izbire).
The nozzle configuration and position shall ensure that the water jets shall be directed toward the test tyre and pointed toward the pavement at an angle of 15 to 30°.
Za preskušanje preskušanih pnevmatik so mogoče 3 konfiguracije namestitve: