SuperFlow AutoDyn, Руководство оператора

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M a n u a l
AutoDyn
Section 4 - Page 6
AutoDyn manual Section 4. PM7, 5/2004
then you should be aware of the difficulties this will cause to ventilate
the room, cool the vehicle, and evacuate the exhaust.
For convenience and safety, a separate control room (at least 8’ (2.4 m)
long by 6’ (1.8 m) wide), overlooking the dynamometer area, is recom-
mended. This room houses the computer and printer and provides a
convenient viewing area during testing.
4.2.2. Room positioning
A chassis dynamometer represents a significant investment. Unless
secrecy of your development programs is an important issue, it may be
to your advantage to create high visibility of the dynamometer by
positioning it within view of customers in the reception area of your
facility.
In all cases, vehicle and operator access to the dynamometer area and
dynamometer itself must be easy. Many high performance or racing
vehicles have limited ground clearance and turning radius. Ramps or
tight turns may cause problems.
The dynamometer area must be separated and well insulated from the
rest of your facility to avoid noise and fume problems. Positioning the
dynamometer next to an exterior wall also may reduce the cost of air
handling systems.
Finally, wherever possible the dynamometer should be positioned so
that exhaust extraction systems can be directed away from other nearby
buildings, to minimize noise impact on your neighbors.
4.2.3. Room layout
The position of the dynamometer in the room must take into consider-
ation the type of vehicles which will be tested (FWD and/or RWD) as
well as their size and tie-down requirements. As discussed in the
“Theory of testing” section, tire losses increase with downforce. To
minimize downforce while applying adequate vehicle holding force, tie-
down straps should be fairly horizontal. This means the tie-down hooks
must be installed away from the vehicle. Make sure the dynamometer is
positioned to allow for this distance.
If present, the control room must be positioned for easy access from the
dynamometer room and optimum viewing of the vehicle and operator. Avoid
positioning the control room where failure of a mechanical part on the
vehicle may create a hazard.
Floor strength should be considered. The AutoDyn weighs between
5500 and 13,000 lbs, depending on the model. Add the weight on the
driven axle of the vehicle for total floor load. The AutoDyn is supported
8 to 20 points. In some cases, the floor will have to be reinforced to
support this pressure. A 4” to 6” (10 to 15 cm) reinforced concrete slab
of 4000 psi (280 kg/cm
2
) is adequate.
For reasons outlined above, the control room should have a large
window to the dynamometer area. A window to the workshop and
possibly to a customer viewing area may be desirable, and in some
cases, even required by employee safety regulations.