Product

RRTR

Tire Rolling Resistance Test Rig

High accuracy and stability achieved through
Model Based Sensor (MBS) technology

Features

  • High accuracy and robust measurement
    • Rolling resistance : PC ≤ ±0.3N TB ≤ ±0.5N
    • Measurement reproducibility : σ ≤ 0.005N/KN
  • Test standards compliance
  • Fully automated
  • Energy saving from aluminum cast drum

RRTR

6 components sensor

Main window

Drum

High accuracy and robust measurement

Model Based Sensor (MBS)

The core component for measuring rolling resistance used A&D's in-house measurement technology with a digital sensor, which minimizes cross-talk error and measures 6 components of force with high accuracy.

Temperature monitoring and compensation

Three temperature sensors are installed in the system to monitor atmosphere, tire surface, and drum surface temperature. In addition, 6 components of force are digitally measurement, and then optimal temperature compensation is applied to achieve the ideal measurement, A temperature chamber option is also available.

Highly rigid design

The drum and tire stands are designed to have high rigidity for precise tire alignment and measurement, which results in a high measurement reproducibility with σ ≤ 0.05N/kN. This enables an optimized sample check for tire lots.

Test standards Compliance

  • The testing system supports international test standards required for tire testing.
    Standards include ISO 28580, SAEJ1269, SAEJ2452, and UN ECE R117.
  • All the test sequences are pre-programmed and fully automated.

Fully automated testing

  • In addition standards tests, user specific test patterns can also be programmed.
  • Up to 20 different test patterns can be scheduled.
  • Test data including test condition information is saved in CSV format for flexible usage.

Energy savings from the aluminum cast drum

  • A&D introduced the world's first test drum using an aluminum cast drum.
  • The aluminum cast drum reduces the inertia of the drum by almost half.
    Compared to a steel drum, system operating energy is reduced by 30%. (According to in-house testing)

Measurement data

Measurement data with a standard tire.

  Calculation Measurment Skin test measurment
  Rotation direction RR RR temp.correct RRC Spindle force Tire load Distance
(Drum surfacetyre axis)
Ambient temperature Tire surface temprature Drum surface temprature Drum speed Spindle force Tire load Distance
(Drum surfacetyre axis)
Parasitic loss
    [N] [N] [N/kN] [N] [N] [mm] [℃] [℃] [℃] [km/h] [N] [N] [mm] [N]
1 Normal 30.21 30.42 7.12 27.48 4272 286.87 25.9 28.8 26.4 80.02 3.94 100 308.50 5.15
Reverse 30.64 30.98 7.25 27.49 4272 286.84 26.4 28.6 26.0 80.02 3.61 100 308.54 4.73
2 Normal 30.69 30.71 7.19 27.78 4272 286.95 25.1 28.4 26.0 80.02 3.86 100 308.53 5.06
Reverse 30.78 30.87 7.23 27.55 4272 286.96 25.4 28.2 25.7 80.03 3.58 100 308.57 4.68
3 Normal 30.67 30.64 7.17 27.81 4272 287.06 24.9 27.6 25.1 80.03 3.91 100 308.56 5.12
Reverse 30.77 30.69 7.18 27.62 4272 287.02 24.7 27.8 25.3 80.03 3.65 100 308.58 4.78

RRC repeatabillty

  1 2 3 Ave. σ
Normal 7.12 7.19 7.17 7.16 0.035
Reverse 7.25 7.23 7.18 7.22 0.034
Avarage 7.19 7.21 7.18 7.19 0.015

Test tire information

  • Size & specifications 195/55R16 87V
  • RR (Data sheet) 30.8[N]
  • RRC(Data sheet) 7.21[N/kN]

Calibration device

A&D is well versed in force measurements and offers a high-quality calibration device that has been manufactured in-house for calibrating the system on site. The calibration device is available as an option and the user can calibrate the system themselves for easy maintenance, or an A&D engineer can visit the user's site for periodical calibration service.

Calibration device

Calibration device

Layout options

When installing the testing machine, space may be limited. However, the position of driving motor can be selected, which provides flexibility when installing the testing machine.

Specifications

    Specification
Passenger Car (PC) Truck and Bus (TB)
Measurment/Control range Tire load force 10 to 15000N 50 to 60000N
Inflation pressure 10 to 400kPa 100 to 1000kPa
Drum surface speed 5 to 120km/h to 270km/h (option)
Spindle force (Rolling resistance) ±300N ±500N
Tire stand stroke *1 200 to 500mm 300 to 760mm
Tite stand 1position / 2position (option)
Instrumention accuracy Tire load force ±10N ±30N
Inflation pressure ±1kPa
Spindle force ±0.3N ±0.5N
Distance (Tire axis to the drum surface) ±0.5mm
Temoerature sensor ±0.2℃
Drum surface speed ±0.05km/h
Time ±0.001sec
Control accuracy Tire load force ±20N ±45N
Inflation pressure ±3kPa
Drum surface speed ±0.2km/h
Test tire Tire diameter σ500 to 900 σ700 to 1500
Rim size 12" to 24" 18" to 24"
Tire weight 60kg 160kg
Tire stand alignment Load application ≤1mrad (≤0.057°)
Camber angle ≤2mrad (≤0.114°)
Slip angle ≤1mrad (≤0.057°)
Drum Diameter 2.0m / 1.7m (option)
Width 600mm
Frame material Aluminum / Steel (option)
Test surface roughness (Drum) Surface roughness 6.3S
Surface material Stainless steel (SUS420J2)
Measurment reproduciability (σ) Rolling resisitance coefficient ≤0.05N/kN*2 ≤0.06N/kN*2
Measurment point Ambient temperature 0.6m from the center line of drum width
Installation requirement Installation environment temperature 5 to 35℃
Floor weight capacity 2000kg/m2(aluminium cast drum) 2500kg/m2(aluminium cast drum)
Utility Power supply AC380 to 460V ±10%
50/60Hz ±5%
120kVA*3
AC380 to 460V ±10%
50/60Hz ±5%
180kVA*3
Air Higher than 0.5MPa
Size Main body W:4220mm
D:1600mm
H2900mm
W:4220mm
D:1600mm
H3000mm
Motor cabinet W:1800mm
D:600mm
H2350mm
W:2200mm
D:600mm
H2350mm
Operating cabinet W:570mm
D:800mm
H1887mm
Other Options Constant temperature chamber
Calibration device
  • *1 Distance from the roller surface to the center of tire rotation.
  • *2 Standard deviation of three consecutive tests is the reproducibility value. The temprature variation for the three tests must be within ±1℃. If the environment tempreture cannot be controlled to meet this requirement, we offer a constant-tenprature chamber as an option. Please feel free to contact us when this option is necessary.
  • *3 Power supply specifications depend on the selected drum material.

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