SuperFlow AutoDyn, Руководство оператора

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AutoDyn
Operators Manual
Section 8 - Page 16
Theory Of Testing.fm
8.7.1.3 Rpm_RpmA.tpf
This test is identical to the Inertia.tpf except the lower start point and upper recording termination
point is determined by engine speed, RPM, instead of vehicle speed (MPH).
At the end of the test, the eddy current absorber is engaged to a value of 35% to apply braking
force to return the vehicle to the approximate starting MPH speed.
This test may be stored in an “optional tests” folder instead of the normal test folder. If you do not
have this test and would like a copy, please contact our Customer Service Department.
8.7.2 Controlled Acceleration Tests
These tests are only available on eddy current equipped dynamometers.
The controlled acceleration test is similar to the inertia test in that the operator accelerates the
vehicle from a starting speed to an ending speed. This test should be run in a single gear at wide
open throttle.
Power is calculated from the rate of acceleration of the dyno system inertia mass and the power
absorbed by the eddy current absorber strain gage during the test. Dyno parasitic values are also
added to the wheel power calculation, as in the inertia style tests. The difference from an inertia
test is the rate of acceleration is controlled during the entire test by the eddy current absorber.
This test is similar to the type commonly used on SuperFlow engine dynamometers. The engine
accelerates at the same rate throughout the test. This test is far more accurate than inertia tests
for tuning the engine, especially when observing air/fuel ratio data. Power numbers for this type
test may differ slightly from those observed under inertia only conditions. However, these numbers
are a more accurate representation of the actual power available to propel the vehicle than those
presented by the inertia style test.
The rate of acceleration should be chosen to closely match the vehicle's typical usage rate of
acceleration. This is particularly important for calibrating air/fuel ratios. Choosing an acceleration
rate that is different than the vehicle's common usage may result in a too rich or too lean air/fuel
ratio during normal vehicle operation off the dyno.
These tests record data automatically and is saved at the end of each test run to a SFD file on the
computer disk drive. All tests are generally performed at wide open throttle, but may be performed
at any fixed throttle position.
8.7.2.1 Proaccel.tpf
The Controlled Acceleration test prompts the operator for an initial test speed in MPH at which the
data acquisition system will begin recording data. An ending speed in MPH is then requested and
is used by the test profile to terminate recording of data.