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Diagnostic Instrumentation for Military Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1973 by SAE International in United States
Annotation ability available
Event: Fleet Week
In common with other owners and operators of large fleets of vehicles, the U.S. Army is faced with a major maintenance task. A significant part of this task is the correct and timely diagnosis of the vehicle faults which cause down time and those which can propagate into secondary, and usually more serious, damage. The Army, of course, has two operational situations which differ in type and degree from those of commercial fleets. First, the duty cycle for Army vehicles is less predictable and instant availability is essential. The second is that Army vehicles are armored, shielded and waterproofed (fordable) to an extent that test point access is severely limited in comparison to commercial vehicles. To grapple with this situation, the U.S. Army Tank-Automotive Command has placed a series of contracts for feasibility studies with RCA's Aerospace Systems Division to investigate the practicality and the means for preinstrumentation of vehicles and for devising appropriate control and readout test units compatible with this built-in instrumentation.
In the process of this work, several new transducers have been developed, and a concept for testing for engine power has been applied.
Two new instruments have been designed and tested for feasibility. A “vehicle readiness unit,” suitable for use in on-board monitoring of road tests and sample runs, with provision for a simple engine power test and for detecting marginal ignition systems, is also described. A “vehicle test meter,” which permits a diagnostic survey to be performed at better than a 10:1 time savings over conventional maintenance procedures, is discussed.
In addition, a computer-controlled unit developed by the Army for detailed diagnostic tests has been adapted and software developed to permit operation with the built-in instrumentation (diagnostic connector).
The basic objectives and operating principles of these devices are presented.
CitationTeixeira, N., Pradko, F., Sarna, D., and Garland, P., "Diagnostic Instrumentation for Military Vehicles," SAE Technical Paper 730658, 1973, https://doi.org/10.4271/730658.
- Studies, supporting most of this work, performed on Contracts DAAE07-71-C-0235, DAAE07-72-C-0089, DAAE07-72-C-0340, and DAAE07-73-C-0035
- Pradko F. Handler H. Sarna D.S. “BITE-Built-In Test Equipment.” Paper 72005 First International Congress on Automotive Safety San Francisco July 1972
- Sarna D.S. Pradko F. Ancona D. “Diagnostic Equipment for Army Vehicles.” Paper 720236 SAE Automotive Engineering Congress Detroit January 1972
- TACOM Report No. 11654 “Feasibility Study of Advanced Vehicle Self-Test Systems”
- Fischer H. L. et al. “PDU/BITE Adaptation.” TACOM Technical Report July 15 1973
- Fineman H.E. “GO/NO-GO Indicators for Vehicle Readiness Testing.” IEEE Automatic Support Systems Conf. Philadelphia November 1972