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Precision Position-Sensors in Automotive Applications
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English
Abstract
The use of microprocessors in automotive electronics systems such as Electronic Fuel Injection (EFI) and Electronic Fuel Management (EFM) has created a need for a variety of precision position-sensors capable of reliable performance in underhood environments. This paper describes the basics of precision potentiometers and switches which have been adapted for these and other specialized engine applications.
A brief description introduces the precision potentiometer as a position-sensor, and details the differences among the more common types of potentiometers. The fundamental low cost position-sensor concept is elaborated upon with a discussion of some of the special materials and techniques used to develop units for automotive applications. Among the special problems discussed are requirements of long life at high temperature, high vibration environment, and stringent performance accuracy.
Also discussed are typical applications in Exhaust Gas Recirculation, Electronic Fuel Injection, and Throttle Position Sensing.
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Authors
Citation
Wheeler, W., "Precision Position-Sensors in Automotive Applications," SAE Technical Paper 780209, 1978, https://doi.org/10.4271/780209.Also In
References
- Variable Resistive Components Institute “Industry Standard VRCI-P-200A.” 1974 VRCI
- Todd Carl David “The Potentiometer User's Guide to Cost Effective Applications.” McGraw-Hill 1975
- Oswald R.S. Laurence N.L. Devlin S.S. “Design Considerations for an On-Board Computer System.” Paper 750434 (SP-393) SAE Automotive Engineering Congress Detroit February 1975
- Walker Gerald M. “Automotive Electronics Gets the Green Light.” ELECTRONICS Magazine McGraw-Hill September 29 1977