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Application of a Single Chip Microcomputer to Engine Management Control Systems
Technical Paper
891291
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Language:
English
Abstract
The development of a cost effective single chip microcomputer based controller for engine management systems has given powertrain design engineers an alternative to the current electronic control mechanizations. With this design, several applications for simple, lower cost controllers can be explored.
A single chip controller which supports throttle body fuel injection or simultaneous port fuel injection, electronic spark control, idle speed control. and various emission control functions is compared to an existing multi-chip controller. Architectural differences are discussed, highlighting the system design issues in lower cost single chip control systems. These design issues include memory configuration and allocation, throughput requirements and limitations, back-up fuel control strategies and software development and release lead times associated with the single chip controller.
The mechanization of a single chip controller is reviewed in further detail, illustrating the flexibility and capability of such a design. A review of the features which enable the controller to support four, six or eight cylinders engines, to satisfy customer applications around the world, and to provide a solution for engine designers to meet varying emissions standard are discussed in further detail.
A review of the future enhancements to the single chip controller completes the discussion. Microcomputer bus speed, input/output capability, memory amounts and configuration, as well as the application potential of 16 bit microcomputers are included.
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Citation
Deno, J., "Application of a Single Chip Microcomputer to Engine Management Control Systems," SAE Technical Paper 891291, 1989.Also In
References
- Motz, P.R. “Automotive Electronics: Microprocessors ‘Under the Hood’” SAE Proceedings March 6 1985
- Delco Electronics 1984 Edition Fuel Injection Throttle Body Injection and Port Fuel Injection Electronic. Control Module (EMC) Remanufacture Manual Delco Electronics Publication DRM-1984-1 1983
- Delco Electronics 1987 Edition Fuel Injection Throttle Body Injection and Port Fuel Injection Electronic Control Module (ECM) Remanufacture Manual Delco Electronics Publication DRM-1987-1 January 1986
- Motorola “MC68HC11A8 Advanced Information HCMOS Single-Chip Microcomputer Motorola Literature Distribution September 1985
- Motorola “MC68HC11 Advanced Information HCMOS Single-Chip Microcomputer Programmer's Reference Manual Motorola Literature Distribution September 1985