Truck and car transmission test stands
Service life, efficiency and noise testing of transmissions under realistic conditions
- Type: development test stand, endurance test stand, component test stand
- Device under test: vehicle transmissions (manual, automatic, dual-clutch)
- Test task: performance, efficiency, durability, noise and shift behavior
In modern cars and trucks, the transmission carries power from the engine to the wheels. It has to work under very different loads: pulling away on a hill, cruising on the highway, constant load changes in stop-and-go traffic. Expectations for shift comfort, efficiency, noise and durability are high.
Development departments and test centers therefore need test stands that simulate every relevant operating state under controlled conditions. In demand are flexible solutions that cover different transmission types, variable profiles and high system power, with repeatable results and reliable data acquisition.
- Automotive
- Development
- Components
Test tasks
- Performance testing (efficiency and loss analysis)
- Endurance runs under changing loads
- Shift behavior and comfort assessment
- Structure-borne noise and noise measurement
- Thermal management and temperature behavior
- Validation of real driving profiles on the test stand
Typical test parameters (adjustable)
- Speed and load profiles (freely definable)
- Number of load cycles (e.g. loops for endurance runs)
- Structure-borne noise limits
- Shift points and shift frequency
- Optional: transmission oil temperature (with external conditioning)
Options and special functions
- Transmission oil conditioning unit
- Acoustic cell for NVH testing
- Additional temperature or vibration channels
- Can be combined with the gear shift force test stand
Benefits at a glance
- Energy-efficient thanks to DC link coupling
- Four-quadrant operation for realistic load changes
- Modular design for different transmission sizes
- Intelligent algorithms compensate gear backlash
- Works with series transmissions and prototypes
- Convenient evaluation and reporting
TMX transmission test stands in detail
TMX transmission test stands for trucks and cars are built for demanding performance, acoustic and endurance testing. Four-quadrant operation, freely configurable test profiles and well-designed mechanics let you test a wide range of transmission types efficiently and accurately.
Test stand mechanics
The test stands are mechanically rugged. Movable machine modules adapt them to different transmission sizes and configurations.
- Load and drive machines matched to the test task
- Laterally movable bearing blocks for quick adaptation to different transmissions
- Enclosure with sliding door for safety and noise protection
- Operator station and control cabinet outside the test cell
Drive and control
Drive and load machines are connected so that they can switch dynamically between driving and braking.
- Four-quadrant operation through smart assignment of drive and load side
- Frequency inverters with a shared DC link for energy-efficient operation
- Manual setup mode at reduced speed
Measurement and control technology
The data acquisition system records every test-relevant variable in real time, reliably, synchronously and without data loss.
- Distributed measurement system and powerful control CPU
- Torque and speed at transmission input and output
- Structure-borne noise measurement to analyze noise behavior
- Temperature monitoring and optional oil temperature conditioning
Operating software
The software makes test sequences easy to configure and monitors and evaluates everything in real time.
- TMX test sequence editor for speed and load profiles
- Profiles as ramps, steps or imported driving cycles
- Display of all measured variables with limit monitoring
- Fully automatic test records and reports
Summary
TMX truck and car transmission test stands combine high flexibility with high system power. They enable realistic tests of many transmission designs, from performance analysis to long-term behavior. Modular design, intuitive operation and energy-efficient operation make them a good fit for development and for endurance testing.
TEST STAND SOLUTIONS
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