On old-fashioned dynamometers, the operator or the observer had to manually record the simultaneous readings on paper.
Nowadays, most dynamometers replace the observers notes with computerized devices that acquire and store the data.
Because of the very loud noise generated by the dynamometer and the engine, a performance test is stressful to anyone whos watching it. In these given conditions, it is very difficult to manually record all the data.
A reliable computerized data acquisition system is considered to be indispensable today among engine builders and testers. Nowadays it is possible to buy recording, control, and playback capabilities in a palm sized package, that many years ago would have cost a lot more and would have had the size of a refrigerator.
An appropriate computerized data acquisition system must have a very fast sampling rate. For obtaining quality data, you will need at least 100 samples, of all sensor channels, per second (100Hz). A 200Hz logging rate or more is even better. It is important to remember that between spark plug firings there is a drop in torque and rpm that can be measured. The crankshaft is accelerated right after...
To view and download this full PLR article, you must be logged in. Registration is completely free. Once you create your account, you will be able to browse, search & downlod from our PLR articles database of over "1,57,897+" on 1,000's of niches and 200+ categories without paying a penny. Click here to signup...
