Air-fuel ratio controller

Abstract

Abstract PURPOSE:To improve the precision in the lean control by memorizing the learned values corresponding to the operation regions divided into plural parts and forming a learning region for feedback-controlling the air-fuel ratio to a theoretical air-fuel ratio in one part of the individual region. CONSTITUTION:A signal supplied from an operation state detecting means 16 for an engine 1 is input into a controller 17, and control to a lean air-fuel ratio is performed in the stationary traveling. The learned values of the air-fuel ratio control quantity corresponding to each operation region divided into plural parts are memorized. The learning region for feedback-controlling the air-fuel ratio to a theoretical air-fuel ratio is formed at least in one part of the individual region. Therefore, even in the lean control, the control precision of air-fuel ratio can be improved.

Inventors

• 👤 Masaaki Uchida
• 👤 正明 内田
• 👤 Yukimasa Kai
• 👤 志誠 甲斐

Bibliographic Details