T272/N Industrial Bellows Actuator 272.2.190 GART Convoluted Air
Spring 93740 CF Gomma
Product Information
GUOMAT Brand
GUOMAT Part Number: 2H250180
Material: Rubber+Steel
Warranty: 1 Year
Type: Double Convoluted Air Spring with Flange Ring
Delivery Time: 2-7 Working Days
Payment Methods: Bank Card, PayPal, Western Union
Shipping Methods: International Express, Air, Ocean, Railway, Truck
Cross Reference Number
GUOMAT Number: 2H250180
GART Number: T272/N
GART Number: T 272/N
GART Number: 272.2.190
MAGIRUS DEUTZ Number: 3422652
MAN Number: 81.43601.0023
TRAS CAR Number: 03003000090
ZORZI Number: 1006500
NOMEC Number: 99AMM0000024
CF GOMMA Number: 93740
AIRTECH Number: A2 250/K03
Technical Data
| Flange diameter: | 183mm |
| Distance between threaded holes: | 145mm |
| Threaded holes: | M8 |
| Number of threaded holes per side: | 8 |
| Natural height: | 180mm |
| Maximum height: | 206mm |
| Minimum height | 84mm |
Air Spring Applications on Chassis Dynamometers
A chassis dynamometer, commonly known as a "rolling drum" or "drum
test bench," is an indoor test device used to simulate vehicle road
driving conditions. It is primarily used for vehicle performance
testing, emissions testing, durability testing, and R&D. Air
springs play a crucial role, particularly in passenger and
commercial vehicle testing.
1. Accurate Road Simulation
Data-Driven: First, a prototype vehicle equipped with numerous
sensors drives on a target road profile (such as rough asphalt,
Belgian roads, or cobblestones), recording signals such as
displacement and acceleration at the wheel center or suspension
mounting points.
Laboratory Replication: On a chassis dynamometer, the wheels of the
vehicle under test are placed on a drum. Air spring actuators are
mounted at the four corners of the vehicle, supporting and
connecting the vehicle's suspension system (typically via adapters
to the wheel hubs).
Signal Reproduction: The control system uses the collected
real-world road signals to send commands to the air spring
actuators, causing them to move up and down precisely, thereby
applying the exact same excitation forces to the vehicle's
suspension as on a real road. This allows the vehicle's body to
experience vibrations consistent with road travel, even when the
vehicle is stationary.
2. Multi-Axis Excitation Capabilities
Advanced road simulators can perform not only vertical (Z)
excitation, but also longitudinal (X) and lateral (Y) excitation.
This is crucial for simulating full-vehicle response under
conditions such as acceleration, braking, and cornering. Air spring
systems utilize sophisticated multi-axis control algorithms to
coordinate multiple actuators to achieve this complex,
multi-dimensional motion.
3. Load and Height Adaptability
Load Support: Air springs can easily support vehicles of varying
weights (from light passenger cars to heavy trucks) by adjusting
the internal air pressure and providing the required support force.
Stance Maintenance: During testing, the system automatically
adjusts the air pressure to maintain a preset, level "driving
attitude," ensuring consistent and repeatable test conditions.
4. Improved Testing Efficiency and Safety
All-Weather and Repeatable: Laboratory testing is unrestricted by
weather, traffic, or time constraints. The same road profile can be
accurately repeated thousands of times, which is crucial for
durability testing and reliability verification, significantly
shortening R&D cycles.
Fail-safe: If any problem occurs during testing (such as vehicle
failure or dynamometer malfunction), the system can be stopped
immediately to ensure the safety of personnel and equipment, which
is difficult to achieve in real-world road testing.
Emissions Testing: In emissions certification testing (such as the
WLTC cycle), the combination of a chassis dynamometer and an air
spring road simulator can replicate real-world driving vibrations
while accurately collecting exhaust pollutants, ensuring test
results are more realistic.
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