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How to evaluate shift comfort?


2009.06.24

For sure you know how hard it is to judge the shift behaviour of a manual gearbox.

Subjective impressions such as “bad”, “bumpy” or “unpleasant” can only help up to a certain
limited degree of further development and optimisation. Moreover, the estimation is highly
dependent on the current mood of the test engineer, his experience or his physical condition.
Therefore, hofer powertrain have created a tool, which makes an objective evaluation of shift
comfort possible. Based on measured data of shift force, shift travel and rotational speeds,
Progear® detects the parameters, which are necessary to evaluate shift quality.
Besides, a basic rating all unpleasant shifting phenomena such as double bump,
scratching, unlocking and spool-in problems are identified and evaluated. The following
graphical representation is possible in any required layout.
 
We are pleased to support you in evaluating your measured data,
no matter whether recorded on a test bench or during vehicle tests.

Just feel free to contact us.

 
 
hofer pdc GmbH
Harald Scheihing
 
Ulmer Strasse 231
70327 Stuttgart
Tel. +49 711 489092-0

 

 



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