Technical Paper

Wide Range Air-Fuel Ratio Control System

880134

02/01/1988

Event
SAE International Congress and Exposition
Authors
Junichi Ishii Hitachi Research Laboratory Hitachi, Ltd.
Matsuo Amano Hitachi Research Laboratory Hitachi, Ltd.
Teruo Yamauchi Hitachi Research Laboratory Hitachi, Ltd.
Nobuo Kurihara Hitachi Research Laboratory Hitachi, Ltd.
Masami Shida Sawa Works Hitachi, Ltd.
Abstract
Content
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.
Meta Tags
Topics
Air / fuel ratio
Engine cylinders
Affiliated or Co-Author
Hitachi Research Laboratory Hitachi, Ltd.
Sawa Works Hitachi, Ltd.
Details
DOI
https://doi.org/10.4271/880134
Pages
12
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.
Additional Details
Publisher
SAE International
Published
Feb 1, 1988
Product Code
880134
Content Type
Technical Paper
Language
English