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Wide Range Air-Fuel Ratio Control System
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English
Abstract
A new air-fuel ratio control algorithm and its effect on automotive engine operation is described. The system consists of a wide range air-fuel ratio sensor and a single point injector with an ultrasonic fuel atomizer. The air-fuel ratio control adopts PID control and it has built-in learning control. A 16 bit microcomputer is used for the latter.
The results of three studies are given. The first deals with adaptive PID gain control for various conditions. The second is the new learning control which uses an integration terra. The third is individual cylinder air-fuel ratio control.
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Authors
Citation
Ishii, J., Amano, M., Yamauchi, T., Kurihara, N. et al., "Wide Range Air-Fuel Ratio Control System," SAE Technical Paper 880134, 1988, https://doi.org/10.4271/880134.Also In
Engine and Driveline Control Systems-New Developments and Trends
Number: SP-0739; Published: 1987-02-01
Number: SP-0739; Published: 1987-02-01
References
- Yamauchi T. Nogi T. “Engine Control System for Lean Burn Combustion,” SAE Paper 870291 1987
- Suzuki S. Sasayama T. Miki M. Ohsuga M. Tanaka S. Ueno S. Ichikawa N. “Air-Fuel Ratio Sensor for Rich. Stoichiometric and Lean Ranges,” SAE Paper 860408 1986
- Ueno Sadayasu Ichikawa Norio “Wide Range Air-Fuel Ratio Sensor,” SAE Paper 860409 1986
- Amano M. Ishii J. Kurihara N. Sasayama T. Suda S. “Development of Automobile Control and Data Acquisition Equipment Employing a 16-bit Microcomputer,” Proceedings of 16th International Symposium on Automotive Technology & Automation May 1987