SuperFlow AutoDyn, Руководство оператора

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Theory Of Testing
Volume 2, 9/10/04
Section 8 - Page 15
8.7 Test Profile Descriptions
The following tests are provided as standard tests for our chassis dyno products:
8.7.1 Inertia Tests
These are simple acceleration tests that do not apply load from the eddy current absorber during
execution of the test. These tests 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 from the
dyno system parasitic losses. Power contributed by the load cell is minimal (except on AutoDyn’s,
where the load cell also measures some parasitic losses), however, it is also added to the inertia
power channel to provide the total wheel power value.
All of these tests record data automatically and is saved at the end of each test to an 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.
8.7.1.1 ProInrt.tpf
This is the most commonly used test profile for chassis dynos. The Inertia 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. The test profile also checks for a negative rate of acceleration which will also
terminate recording of test data, in the event the test is aborted before the upper test speed is
achieved.
At the end of the test, the eddy current absorber is engaged to return the vehicle to the starting
MPH speed. Another identical test can then be performed by pressing the “NEW RUN” selection,
or the test may be stopped by pressing the “STOP” selection.
When the “STOP” selection is pressed, the eddy current absorber will engage to bring the vehicle
speed to 0 MPH. If you do not wish to return the vehicle speed to 0 MPH, simply press the big red
hand (reset) function on the handheld to end the test.
8.7.1.2 Mph_Rpm.tpf
This test is identical to the Inertia.tpf except the upper recording termination point is determined by
engine speed, RPM, instead of vehicle speed (MPH).