The patented ROTOTEST VPA-R (Vehicle Performance
Analyser) is comparable to a "rolling road", but
is far superior in precision and test possibilities as there
is no slip between wheels and rollers, and thanks to the
accurate torque measuring method.
The ROTOTEST VPA-R consists of hydraulic dynamometers,
cooling and fan units, and a System Central Unit . The dynamometers
are connected directly to the wheel hubs.
The dynamometers support the vehicle when in operation and
no additional support is required. This results in stable
and low vibration test conditions.
The cooling and fan units produce heavy airflow in accordance
with the braking power. They are intended for cooling the
dynamometers, but have a performance level that ensures
engine and transmission cooling in most cases.
The System Central Unit (SCU) is based on a 19'' rack cabinet
and contains a Master Control Unit, (MCU) with an embedded
PC for control, measurement and supervision; a UPS for power
supply and backup batteries; and a User Interface &
Measurement (UIM) industrial PC.
