Test and Development
When we say full-service we mean it and as part of Romax’s complete engineering service, we can work with you to devise, implement and carry out test programmes for transmissions, covering rig tests, in-vehicle tests and end-of-line tests. This covers all aspects of the process, including:
- Review of test facilities
- Test rig specification and design
- Supply of specialist test equipment for NVH on rig and end-of-line
- Test procedures
- Design and management of the test programme
- Training on test methods, practical assistance in testing
- Review and documentation of tests, action plans
But testing is just one half of the story. If a test highlights a problem, you have to take action. Our development consultants have extensive experience in root cause analysis and problem resolution. Their practical approach to hands-on problem solving is matched with the advanced analytical tools developed by Romax to give a holistic approach to identifying the cause and providing a solution.
Romax also has a specially designed test rig, which was was first set up to investigate and validate modelling results of a five speed manual gear box. The test rig has been designed and built by a team of Romax Engineers and it is now being used to complete a series of tests on an automotive manual gearbox.
The test rig features a number of components including a double universal joint arrangement used to provide a dynamic torque excitation. The areas that the engineers are particular interested in analysing are linked to a computer and the test results are fed back for the engineers to then interpret. Previously, Romax engineers have investigated gear rattle of a five speed production gearbox and they are also looking at the effects of oil temperature, oil level and shaft speed on the gearbox.
The test rig has been designed so measurements of drag may be made with control of oil temperature and level. The test data is being used to verify calculations for drag. With the drag data and data describing the input excitation the rig allows for validation of simulations of the gear rattle phenomena. Understanding the magnitude of drag on the individual gears and bearings is critically important for predicting the onset of gear rattle in a transmission as well as determining the severity.