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The EFI-Control-Unit Final Test Station
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English
Abstract
Electronic engine control has recently been introduced as standard equipment on a domestic passenger car in the form of the Bendix Electronic Fuel Injection (EFI) system. This system is controlled by the Electronic Control Unit (ECU), a sophisticated electronics package the mass production of which required the development of special-process test equipment capable of ensuring necessary levels of performance, throughput, reliability, and maintainability. This paper details the development of one part of the overall test facility, the Final Test Station. The Test Station accepts control units at several stages of production completion and applies to them simulated manifold-vacuum pressures in a computer-directed sequence. The 100-torr (13-kilopascal) pressure steps propagate pressure surges of less than 0.2 torr (26 pascals) back to the source tanks; total system settling time is 0.6 second or less. The station is both highly reliable and easily maintainable, and was human-engineered for the efficient manual loading and unloading of test units. It has reduced per-unit test time by more than 50 percent and has increased shift production to levels that permit us to meet passenger-car requirements.
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Citation
Ahern, C., Tarter, J., Wolber, W., and Bata, G., "The EFI-Control-Unit Final Test Station," SAE Technical Paper 760244, 1976, https://doi.org/10.4271/760244.Also In
References
- Rivard J. G. “The Electronic Control Unit for Production Electronic Fuel Injection Systems.” Paper No. 760242 SAE Automotive Engineering Congress Detroit, Michigan 23-27 February 1976
- Schlag J. H. “Automatic Computer-Controlled Calibration of EFI Control Units.” Paper No. 760243 SAE Automotive Engineering Congress Detroit, Michigan 23-27 February 1976
- Wolber W. G. Bata G. T. David C. V. Gollomp B. Kudlaty P. R. “A Precision Pressure-Source System for EFI-Control-Unit Calibration and Test.” Paper No. 760245 SAE Automotive Engineering Congress Detroit, Michigan 23-27 February 1976
- Instrument Society of America