Title:
【発明の名称】内燃機関の空燃比制御装置
Document Type and Number:
Japanese Patent JP3138498
Kind Code:
B2
Abstract:
A system for controlling an air/fuel ratio for an internal combustion engine, using an oxygen concentration sensor having a first chamber for introducing therein exhaust gas of the engine and a second chamber for introducing therein reference ambient air to detect oxygen content in the exhaust gas. In order to eliminate exhaust gas pulsation which could affect on detection accuracy, it is firstly determined if engine operation is in a transient state or in a normal state. Then the detected oxygen concentration value in the preceding cycle is added to the product obtained by multiplying the deviation between the values in the preceding and current cycles by a coefficient alpha . The coefficient is made different in the transient state and in the normal state. In the normal engine operation state, the coefficient alpha is determined from engine speed and load.
Inventors:
Yukio Miyashita
Hiroshi Ohno
Shinichi Kubota
Hiroshi Ohno
Shinichi Kubota
Application Number:
JP16945791A
Publication Date:
February 26, 2001
Filing Date:
June 14, 1991
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
F02D41/14; F02D45/00; G01N27/419; (IPC1-7): F02D41/14; F02D45/00; G01N27/419
Domestic Patent References:
| JP2211343A | ||||
| JP2227528A | ||||
| JP62198744A | ||||
| JP1232140A | ||||
| JP6439545A | ||||
| JP61272439A |
Attorney, Agent or Firm:
Yutaka Yoshida