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ROTEC · Measurement applications
Timing-drive dynamics and valve timing
Combine crankshaft and camshaft motion with analogue measurements to investigate the dynamic behaviour of the timing drive.
Measurement task and objective
Investigate timing-drive dynamics associated with component life, valve timing and emissions. Measurement results support the design and assessment of the timing drive.
Time-domain analysis
- Tensioner forces.
- Phase-related vibration and angle-of-twist analysis.
- Oil-pressure behaviour in hydraulic tensioners.
- Closing behaviour of the non-return valve.
- Loss of tensioner control.
- Chain or belt slap.
- Starting noise.
Timing and valve train analysis
Timing and valve trains synchronise crankshaft and camshaft motion to control valve opening and closing. Poorly matched dynamic behaviour can affect component loading and emissions.
Multi-channel speed measurements at the camshafts and an encoder at the crankshaft are combined with analogue signals. These can include pressure in the chain tensioner, chain force and acceleration at the chain guides.
The resulting measurements describe timing-drive behaviour under different load conditions and are evaluated in the time and spectral domains.
Spectral and order analysis
Spectral and order analysis help investigate the dynamic behaviour and excitation mechanisms of the timing drive.
- Conventional order and frequency analysis.
- Resonance behaviour of the drive.
- Excitation mechanisms.
- Envelope curves over rotational speed.
- Phase relationships between excitations, for example from high-pressure pumps.
- Chain- and belt-drive noise.
Questions and answers
What is RAS, and what does the ROTEC rotational analysis solution include?
The ROTEC Rotational Analysis System (RAS) is used to analyse rotating components in mechanical engineering, automotive development, power generation and motorsport. It combines high-resolution counter-based acquisition with an angle-based approach to rotational speed measurement and analysis.
The measurement chain includes optical and magnetic speed sensors, signal-conditioning adapters, the modular RASdelta measurement system and specialised measurement and analysis software. The angle-based approach can help identify sensor vibration and other measurement influences during evaluation. ROTEC ENGINEERING supports demanding measurement tasks.
Can the measurement system and software be configured for a specific application?
RASdelta is a modular measurement front end. The source describes configurations with 8 or 16 measurement cards, selected to suit the measurement task. RAS software provides tools for analysing rotating components and complex systems without requiring users to write their own measurement or analysis programs.
ROTEC ENGINEERING can advise on application-specific measurement questions and the selection of a suitable configuration.
Does ROTEC also provide engineering and project support?
Alongside sensors, signal conditioning, data acquisition and analysis software, ROTEC provides engineering and consulting services. These include measurement-point design in CAD, component machining, sensor installation and calibration, measurement execution, data evaluation and presentation of results.
Project support can cover individual work packages as well as a wider measurement project, according to the agreed scope.
Is training available for commissioning and using a measurement system?
ROTEC offers its Training Week in German and English as well as application-specific user training. Training can combine measurement principles, a detailed introduction to the software and practical demonstration measurements in the user’s environment.
Support is also available when commissioning a new system and becoming familiar with the settings and functions of RAS software.
How can users access support and self-help information?
The Munich sales and support team serves Central Europe, supported by local partners in other markets. Partners assist with measurement technology, first-level support and sales enquiries.
ROTEC also provides a knowledge base with registration-based access to information on topics including torsional vibration, transmission error and valve train analysis. Contact the team to discuss the appropriate support route for your application.
Discuss your measurement task with ROTEC
ROTEC ENGINEERING supports measurement-system selection, installation, testing and evaluation to suit your application.
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