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Digital Engine Controller
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English
Abstract
An electronic engine control system that uses a microcomputer has been developed. It combines four control systems - fuel injection, ignition timing, EGR and idle speed control - utilizing the engine speed and intake air quantity for its main parameters.
The control circuit is composed of an 8-bit microcomputer combining an 8k byte ROM, RAM, a custom designed input/output LSI, and two hybrid integrated circuits, one has voltage regulators and another has input/output interface circuits.
The control program consists of a main program, a fail-safe program for noise protection and a check program for diagnostic functions.
The main program uses interrupt techniques to control effectively the four items by one microcomputer. The interrupt requests occur from crankshaft position signal and interval timer signals.
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Authors
Topic
Citation
Asano, M., Hosaka, A., Tominaga, T., and Ezoe, M., "Digital Engine Controller," SAE Technical Paper 800825, 1980, https://doi.org/10.4271/800825.Also In
References
- Winstead William P. “A Production Computerized Engine Timing System.” SAE Paper 770854 .
- Hagen D. F. “Electronic Engine Controls at Ford Motor Company.” SAE Paper 780842 .
- Webster J. L. Lappington J. P. “Chrysler’s Digital Spark Timing Computer.” SAE Paper 780844
- Lappington John Caron Laverne A. “Chrysler Microprocessor Spark Advance Control.” SAE Paper 780117
- Ikeura Kenji Hosaka Akio “Microprocessor Control Brings About Better Fuel Economy With Good Driveability.” SAE Paper 800056 .
- Sasayama, Takao et al. “A Concept of Input/Output Signal Processing for Microprocessor Engine Control Systems.” SAE Paper 800125