Figure: Investigations / Torsional vibration analysis on the clutch / coupling

Measurements on the clutch, crankshaft, dual mass flywheel and damper

Problem: Rotational irregularities

Goal: Optimal design of coupling

Modern engines are becoming increasingly compact, powerful and economical. This effect – also known as downsizing – leads to an increase in combustion pressures and a reduction in the mass inertia of the crankshaft in internal combustion engines. Because this significantly increases rotational irregularities, clutch and vibration damper manufacturers are faced with a new challenge.
For this reason, it is essential to measure and evaluate crankshaft torsion, clutch slip and the behavior of a vibration damper to ensure functional reliability and service life of the individual components.

In the coupling measurement speed measurement takes place by means of a magnetic sensor on the starter ring gear and on the transmission input shaft. Main analyses are the torsion angle between engine (input) and gearbox side, slip, order analysis, especially angular acceleration in the gearbox (gearbox rattling).
In the ROTEC product portfolio you will find a variety of different speed sensors (laser and magnetoresistive) suitable for the installation situation, environmental conditions and optimal signal resolution. In order to be able to measure the torsion angle between two speed signals with high resolution, ROTEC offers speed measurement boards with 12.3 GHz. At the same time, other analog signals with (max. 24 bit and 3.2 MHz) can be recorded and thus a correlation between torsional vibrations and e.g. noise can be analyzed. The recorded measured values are evaluated in the time and spectral domain.

The recorded measured values are evaluated in the time and spectral domain.

Furthermore ROTEC ENGINEERING provides you with support and technical engineering know-how for problems related to vibration analysis of engines, transmissions and drive trains. With our know-how, we make a valuable contribution to your product in the areas of timing gear validation, valve train optimization, clutch design, transmission errors (TE), transmission optimization, oil supply optimization, powertrain measurement and optimization, measurement technology application.

Time Domain
Analyses

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  • Analysis of static and dynamic deformations
  • Analysis of angular accelerations (gearbox rattling)
  • Analysis of the torsional angle curve (clutch slamming)
  • Starting and stopping behavior
  • Flywheel wobble

Spectral Domain
Analyses

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  • Analysis of the dynamic excitations
  • Verification of the decoupling behavior of the coupling
  • Resonance behavior of the entire system
  • Change of natural frequencies of the ambient condition
  • Dynamic peak loads

Associated
Products

WHERE CAN TORSIONAL VIBRATIONS
BECOME CRITICAL IN THE E-POWERTRAIN?

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